/* ==========================================================================
   Yachay Design System — Engineered with UI Skills + Modern Web Guidance
   Tokens sincronizados con DESIGN.md
   ========================================================================== */

:root {
  color-scheme: light dark;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;

  /* Paleta base (Modo Claro por defecto) */
  --page-default: #F7F7F5;
  --surface-default: #FFFFFF;
  --surface-subtle: #F1F1EE;
  --surface-elevated: #FFFFFF;
  --surface-sunken: #EAE9E4;

  --fill-primary: #141413;
  --fill-primary-hover: #292826;
  --fill-accent: #1D4ED8;
  --fill-accent-hover: #1E40AF;
  --fill-accent-subtle: #EFF6FF;

  --content-primary: #141413;
  --content-secondary: #52514E;
  --content-muted: #6E6D69;
  --content-inverse: #FFFFFF;
  --content-accent: #1D4ED8;

  --line-default: #E4E3DE;
  --line-strong: #C9C8C2;
  --line-input: #8A8984;
  --media-outline: oklch(0 0 0 / 0.08);

  /* Colores semánticos de respuesta (Siempre acompañados de forma geométrica ▲ ◆ ● ■) */
  --choice-triangle: #C81E3A;
  --choice-triangle-hover: #AD1730;
  --choice-diamond: #155EEF;
  --choice-diamond-hover: #104AC4;
  --choice-circle: #B45309;
  --choice-circle-hover: #964406;
  --choice-square: #15803D;
  --choice-square-hover: #116932;

  /* Estados semánticos */
  --status-success: #15803D;
  --status-success-bg: #ECFDF3;
  --status-danger: #B91C1C;
  --status-danger-bg: #FEF2F2;
  --status-info: #1D4ED8;
  --status-info-bg: #EFF6FF;

  /* Tipografía */
  --font-sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Radios concéntricos: outer (20px) = inner (12px) + pad (8px) */
  --radius-card: 1.25rem;
  --radius-control: 0.75rem;
  --radius-sm: 0.5rem;
  --radius-pill: 9999px;
  --card-pad: 0.5rem;

  /* Sombras multicapa naturales (mengto/beautiful-shadows) */
  --shadow-sm:
    0px 1px 1px -0.5px rgba(0, 0, 0, 0.05),
    0px 3px 3px -1.5px rgba(0, 0, 0, 0.05),
    0px 6px 6px -3px rgba(0, 0, 0, 0.04);
  --shadow-md:
    0px 1px 2px -0.5px rgba(0, 0, 0, 0.06),
    0px 4px 8px -2px rgba(0, 0, 0, 0.06),
    0px 12px 20px -4px rgba(0, 0, 0, 0.06);
  --shadow-lg:
    0px 2px 4px -1px rgba(0, 0, 0, 0.06),
    0px 8px 16px -4px rgba(0, 0, 0, 0.08),
    0px 24px 36px -8px rgba(0, 0, 0, 0.10);

  /* Movimiento (emil-design-eng) */
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);

  /* Interpolación perceptual progresiva (modern-web-guidance: visual-effects) */
  --in-oklab: ;
  --in-oklch: ;

  /* Superficie translúcida y atmósfera sutil */
  --logo-bg: #141413;
  --logo-rim: rgba(255, 255, 255, 0.08);
  --header-glass: rgba(255, 255, 255, 0.82);
  --loader-backdrop: rgba(247, 247, 245, 0.88);
  --hero-glow-a: rgba(29, 78, 216, 0.08);
  --hero-glow-b: rgba(21, 128, 61, 0.05);
  --grid-dot-color: rgba(20, 20, 19, 0.06);

  accent-color: var(--fill-accent);
}

@supports (background: linear-gradient(in oklab, white, black)) {
  :root {
    --in-oklab: in oklab;
    --in-oklch: in oklch;
  }
}

@property --arc-start {
  syntax: "<angle>";
  inherits: false;
  initial-value: 0deg;
}

@property --arc-end {
  syntax: "<angle>";
  inherits: false;
  initial-value: 0deg;
}

@property --progress-dash-animation {
  syntax: "*";
  inherits: false;
  initial-value: , progress-dash 3s ease-in-out infinite;
}

@property --spot-inner {
  syntax: "<length-percentage>";
  inherits: true;
  initial-value: 0px;
}

@property --spot-outer {
  syntax: "<length-percentage>";
  inherits: true;
  initial-value: 0px;
}

@media (prefers-reduced-motion: no-preference) {
  @view-transition {
    navigation: auto;
  }

  ::view-transition-old(root) {
    animation: 180ms var(--ease-out) both yachay-vt-out;
  }

  ::view-transition-new(root) {
    animation: 240ms var(--ease-out) both yachay-vt-in;
  }
}

@keyframes yachay-vt-out {
  to {
    opacity: 0;
  }
}

@keyframes yachay-vt-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --page-default: #0F1012;
    --surface-default: #18191C;
    --surface-subtle: #222428;
    --surface-elevated: #202227;
    --surface-sunken: #131417;

    --fill-primary: #F4F4F2;
    --fill-primary-hover: #E2E2DE;
    --fill-accent: #3B82F6;
    --fill-accent-hover: #60A5FA;
    --fill-accent-subtle: #172554;

    --content-primary: #F4F4F2;
    --content-secondary: #B9B8B4;
    --content-muted: #989792;
    --content-inverse: #141413;
    --content-accent: #60A5FA;

    --line-default: #2B2D33;
    --line-strong: #3E4149;
    --line-input: #6D717D;
    --media-outline: oklch(1 0 0 / 0.10);

    --status-success: #4ADE80;
    --status-success-bg: #052E16;
    --status-danger: #F87171;
    --status-danger-bg: #450A0A;
    --status-info: #60A5FA;
    --status-info-bg: #172554;

    --shadow-sm:
      inset 0 1px 0 rgba(255, 255, 255, 0.04),
      0px 2px 4px rgba(0, 0, 0, 0.35);
    --shadow-md:
      inset 0 1px 0 rgba(255, 255, 255, 0.06),
      0px 8px 20px rgba(0, 0, 0, 0.45);
    --shadow-lg:
      inset 0 1px 0 rgba(255, 255, 255, 0.08),
      0px 20px 40px rgba(0, 0, 0, 0.60);

    --logo-bg: #111318;
    --logo-rim: rgba(96, 165, 250, 0.38);
    --header-glass: rgba(24, 25, 28, 0.80);
    --loader-backdrop: rgba(15, 16, 18, 0.90);
    --hero-glow-a: rgba(59, 130, 246, 0.14);
    --hero-glow-b: rgba(34, 197, 94, 0.07);
    --grid-dot-color: rgba(255, 255, 255, 0.06);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page-default: #0F1012;
  --surface-default: #18191C;
  --surface-subtle: #222428;
  --surface-elevated: #202227;
  --surface-sunken: #131417;

  --fill-primary: #F4F4F2;
  --fill-primary-hover: #E2E2DE;
  --fill-accent: #3B82F6;
  --fill-accent-hover: #60A5FA;
  --fill-accent-subtle: #172554;

  --content-primary: #F4F4F2;
  --content-secondary: #B9B8B4;
  --content-muted: #989792;
  --content-inverse: #141413;
  --content-accent: #60A5FA;

  --line-default: #2B2D33;
  --line-strong: #3E4149;
  --line-input: #6D717D;
  --media-outline: oklch(1 0 0 / 0.10);

  --status-success: #4ADE80;
  --status-success-bg: #052E16;
  --status-danger: #F87171;
  --status-danger-bg: #450A0A;
  --status-info: #60A5FA;
  --status-info-bg: #172554;

  --shadow-sm:
    inset 0 1px 0 rgba(255, 255, 255, 0.04),
    0px 2px 4px rgba(0, 0, 0, 0.35);
  --shadow-md:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    0px 8px 20px rgba(0, 0, 0, 0.45);
  --shadow-lg:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0px 20px 40px rgba(0, 0, 0, 0.60);

  --logo-bg: #111318;
  --logo-rim: rgba(96, 165, 250, 0.38);
  --header-glass: rgba(24, 25, 28, 0.80);
  --loader-backdrop: rgba(15, 16, 18, 0.90);
  --hero-glow-a: rgba(59, 130, 246, 0.14);
  --hero-glow-b: rgba(34, 197, 94, 0.07);
  --grid-dot-color: rgba(255, 255, 255, 0.06);
}

[hidden]:not(.yachay-loader) {
  display: none !important;
}

:root[data-theme="light"] {
  color-scheme: light;
}

/* ==========================================================================
   Reset y Base Tipográfica (rem / clamp(), unitless line-height)
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-family: var(--font-sans);
  font-size: 100%;
  line-height: 1.5;
  background-color: var(--page-default);
  color: var(--content-primary);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background-color: var(--page-default);
  background-image: radial-gradient(60rem 26rem at 50% -6rem, var(--hero-glow-a), transparent 72%);
  background-repeat: no-repeat;
  color: var(--content-primary);
  text-align: start;
  overflow-wrap: break-word;
}

main {
  flex: 1 0 auto;
}

h1, h2, h3, h4 {
  margin: 0 0 0.5rem;
  color: var(--content-primary);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

/* text-wrap: balance solo en titulares sin caja bordeada */
.page-title,
.hero-title,
.section-title,
.stage-question-title {
  text-wrap: balance;
}

h1 {
  font-size: clamp(1.75rem, 1.35rem + 1.8vw, 2.625rem);
}

h2 {
  font-size: clamp(1.3rem, 1.15rem + 0.75vw, 1.75rem);
}

h3 {
  font-size: 1.125rem;
  line-height: 1.25;
}

p {
  margin: 0 0 1rem;
  line-height: 1.55;
  text-wrap: pretty;
  max-width: 68ch;
}

a {
  color: var(--content-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

code, kbd, pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

kbd {
  display: inline-block;
  padding: 0.1rem 0.4rem;
  border-radius: 0.35rem;
  border: 1px solid var(--line-strong);
  background: var(--surface-subtle);
  color: var(--content-primary);
  font-size: 0.75rem;
  line-height: 1.3;
  font-variant-numeric: tabular-nums;
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
}

.muted {
  color: var(--content-secondary);
}

.muted-small {
  color: var(--content-muted);
  font-size: 0.875rem;
}

/* Utilidad accesible .visually-hidden con soporte para skip-link */
.visually-hidden:where(:not(:focus-within, :active)) {
  position: absolute !important;
  clip-path: inset(50%) !important;
  overflow: hidden !important;
  width: 1px !important;
  height: 1px !important;
  margin: -1px !important;
  padding: 0 !important;
  border: 0 !important;
  white-space: nowrap !important;
}

.skip-link:is(:focus, :active) {
  position: fixed;
  inset-block-start: 0.75rem;
  inset-inline-start: 0.75rem;
  z-index: 9999;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-control);
  background: var(--fill-primary);
  color: var(--content-inverse);
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-md);
}

:focus-visible {
  outline: 3px solid var(--fill-accent);
  outline-offset: 2px;
}

[inert], [inert] * {
  opacity: 0.5;
  cursor: default;
  user-select: none;
}

/* ==========================================================================
   Escenario de Carga a Pantalla Completa (#yachay-loader · Moderno y Simplificado)
   Se muestra exclusivamente en la primera visita de la sesión o con ?splash=1.
   ========================================================================== */

html.yachay-loader-suppressed #yachay-loader {
  display: none !important;
}

html:has(#yachay-loader:not([hidden]):not([data-closing])) {
  color-scheme: dark;
}

.yachay-loader {
  --loader-progress: 0.08;
  position: fixed;
  inset: 0;
  z-index: 9500;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding:
    max(1.5rem, env(safe-area-inset-top))
    clamp(1.5rem, 5vw, 3rem)
    max(1.5rem, env(safe-area-inset-bottom));
  overflow: hidden;
  overflow: clip;
  isolation: isolate;
  background-color: #07090E;
  color: #F8FAFC;
  cursor: pointer;
  user-select: none;
  opacity: 1;
  transition:
    display 420ms,
    opacity 360ms var(--ease-out),
    transform 360ms var(--ease-out);
  transition-behavior: allow-discrete;
}

.yachay-loader:where([hidden], [data-closing]) {
  opacity: 0;
  transform: scale(0.98);
  pointer-events: none;
  transition:
    display 420ms,
    opacity 360ms var(--ease-out),
    transform 360ms var(--ease-out);
  transition-behavior: allow-discrete;
}

.yachay-loader[hidden] {
  display: none;
}

.loader-stage-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 48%, rgba(29, 78, 216, 0.18) 0%, rgba(7, 9, 14, 0.95) 60%),
    #07090E;
}

.loader-ambient-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(520px, 90vw);
  height: min(520px, 90vw);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.24) 0%, rgba(56, 189, 248, 0.08) 35%, transparent 70%);
  filter: blur(48px);
  animation: loader-glow-pulse 3s ease-in-out infinite alternate;
}

@keyframes loader-glow-pulse {
  from { opacity: 0.65; transform: translate(-50%, -50%) scale(0.94); }
  to { opacity: 1; transform: translate(-50%, -50%) scale(1.06); }
}

.loader-stage-center {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1.5rem;
  max-width: 380px;
  width: 100%;
}

.loader-emblem-wrap {
  position: relative;
  display: grid;
  place-items: center;
  width: 96px;
  height: 96px;
}

.loader-emblem-halo {
  position: absolute;
  inset: -8px;
  border-radius: 24px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.35) 0%, transparent 70%);
  filter: blur(12px);
  animation: loader-gem-breathe 2.4s ease-in-out infinite alternate;
}

.loader-emblem-svg {
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 8px 24px rgba(29, 78, 216, 0.35));
}

@keyframes loader-gem-breathe {
  from { opacity: 0.6; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1.04); }
}

.loader-brand-lockup {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.loader-brand-title {
  font-family: var(--font-sans);
  font-size: 1.85rem;
  font-weight: 750;
  letter-spacing: -0.03em;
  color: #FFFFFF;
  line-height: 1.1;
}

.loader-author-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.75rem;
  color: #94A3B8;
  letter-spacing: 0.01em;
}

.loader-author-badge strong {
  color: #E2E8F0;
  font-weight: 600;
}

.loader-telemetry {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.loader-telemetry-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.loader-subtitle {
  font-size: 0.825rem;
  font-weight: 500;
  color: #94A3B8;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.loader-pct {
  font-family: var(--font-mono);
  font-size: 0.825rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: #60A5FA;
}

.loader-beam-track {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-pill);
  overflow: hidden;
  position: relative;
}

.loader-beam-fill {
  display: block;
  height: 100%;
  width: calc(var(--loader-progress, 0.08) * 100%);
  background: linear-gradient(90deg, #2563EB 0%, #38BDF8 100%);
  border-radius: var(--radius-pill);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.65);
  transition: width 140ms ease-out;
}

/* ==========================================================================
   Contenedores y Layout
   ========================================================================== */

.container {
  width: min(100% - 2rem, 76rem);
  margin-inline: auto;
}

.container-narrow {
  width: min(100% - 2rem, 32rem);
  margin-inline: auto;
}

.page-section {
  padding-block: 2rem 3rem;
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-block-end: 1.5rem;
}

/* ==========================================================================
   Header & Navegación de 5 Pilares (Reconstrucción REA de Kahoot)
   ========================================================================== */

.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 40;
  background: var(--header-glass);
  background: color-mix(in oklab, var(--surface-default) 82%, transparent);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-block-end: 1px solid var(--line-default);
  view-transition-name: site-header;
}

.header-inner {
  min-height: 4.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.5rem;
  flex-wrap: wrap;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: var(--content-primary);
  font-weight: 800;
  font-size: 1.1875rem;
  letter-spacing: -0.025em;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--fill-primary);
  transition: transform 180ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .brand-link:hover .brand-mark {
    transform: scale(1.06) rotate(-3deg);
  }
}

.brand-wordmark {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand-name {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.025em;
}

.brand-byline {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--content-muted);
  letter-spacing: 0.01em;
}

.site-nav {
  min-width: 0;
  max-width: 100%;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0.25rem;
  background: var(--surface-subtle);
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-default);
  overflow-x: auto;
  max-width: 100%;
  scrollbar-width: none;
}

.nav-list::-webkit-scrollbar {
  display: none;
}

.nav-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 2.5rem;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  color: var(--content-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 550;
  white-space: nowrap;
  transition: transform 150ms var(--ease-out), opacity 150ms var(--ease-out), background-color 150ms var(--ease-out), color 150ms var(--ease-out);
}

.nav-pill:active {
  transform: scale(0.97);
}

@media (hover: hover) and (pointer: fine) {
  .nav-pill:hover {
    color: var(--content-primary);
    background: var(--surface-default);
  }
}

.nav-pill.is-active {
  background: var(--surface-default);
  color: var(--content-primary);
  font-weight: 650;
  box-shadow: var(--shadow-sm);
}

.pin-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: var(--radius-pill);
  background: var(--fill-accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ==========================================================================
   Botones y Controles Interactivos (48px min-height, scale(0.97) press)
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 3rem;
  padding: 0.625rem 1.125rem;
  border-radius: var(--radius-control);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: transform 140ms var(--ease-out), opacity 140ms var(--ease-out), background-color 140ms var(--ease-out), border-color 140ms var(--ease-out);
}

.btn:active:not(:disabled) {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-sm {
  min-height: 2.75rem;
  padding: 0.45rem 0.875rem;
  font-size: 0.875rem;
}

.btn-lg {
  min-height: 3.375rem;
  padding: 0.8rem 1.4rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background: var(--fill-primary);
  color: var(--content-inverse);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16), var(--shadow-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

@media (hover: hover) and (pointer: fine) {
  .btn-primary:hover:not(:disabled) {
    background: var(--fill-primary-hover);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22), var(--shadow-md);
  }
}

.btn-accent {
  background: linear-gradient(180deg, #2563EB 0%, #1D4ED8 100%);
  color: #FFFFFF;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25), 0 2px 8px rgba(29, 78, 216, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

@media (hover: hover) and (pointer: fine) {
  .btn-accent:hover:not(:disabled) {
    background: linear-gradient(180deg, #3B82F6 0%, #1E40AF 100%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.32), 0 4px 14px rgba(29, 78, 216, 0.35);
  }
}

.btn-secondary {
  background: var(--surface-default);
  color: var(--content-primary);
  border-color: var(--line-default);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04), var(--shadow-sm);
}

@media (hover: hover) and (pointer: fine) {
  .btn-secondary:hover:not(:disabled) {
    background: var(--surface-subtle);
    border-color: var(--line-strong);
    box-shadow: var(--shadow-md);
  }
}

.btn-ghost {
  background: transparent;
  color: var(--content-secondary);
}

@media (hover: hover) and (pointer: fine) {
  .btn-ghost:hover:not(:disabled) {
    background: var(--surface-subtle);
    color: var(--content-primary);
  }
}

.btn-danger {
  background: #B91C1C;
  color: #FFFFFF;
}

.btn-danger-text {
  color: var(--status-danger);
  justify-content: flex-start;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--line-default);
  background: var(--surface-default);
  color: var(--content-primary);
  cursor: pointer;
  transition: transform 140ms var(--ease-out), opacity 140ms var(--ease-out), background-color 140ms var(--ease-out);
}

.icon-btn:active {
  transform: scale(0.95);
}

@media (hover: hover) and (pointer: fine) {
  .icon-btn:hover {
    background: var(--surface-subtle);
  }
}

@media (pointer: coarse) {
  .btn,
  .icon-btn,
  .nav-pill {
    min-height: 3rem;
  }
}

/* Iconos Sol / Luna según esquema activo */
.icon-moon {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun {
    display: none;
  }
  :root:not([data-theme="light"]) .icon-moon {
    display: block;
  }
}

:root[data-theme="dark"] .icon-sun {
  display: none;
}

:root[data-theme="dark"] .icon-moon {
  display: block;
}

/* ==========================================================================
   Usuario y Popover Menu ([popover])
   ========================================================================== */

.user-menu-anchor {
  position: relative;
}

.user-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  padding: 0.3rem 0.65rem 0.3rem 0.35rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-default);
  background: var(--surface-default);
  color: var(--content-primary);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 140ms var(--ease-out), background-color 140ms var(--ease-out);
}

.user-chip:active {
  transform: scale(0.97);
}

.avatar-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-pill);
  background: var(--avatar-bg, #1D4ED8);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.popover-menu {
  margin: 0;
  inset: auto;
  position: fixed;
  inset-block-start: 4.25rem;
  inset-inline-end: max(1rem, calc((100vw - 76rem) / 2 + 1rem));
  width: 16rem;
  padding: var(--card-pad);
  border-radius: var(--radius-card);
  border: 1px solid var(--line-default);
  background: var(--surface-elevated);
  color: var(--content-primary);
  box-shadow: var(--shadow-lg);
}

.popover-user-header {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.65rem 0.75rem;
  border-block-end: 1px solid var(--line-default);
  margin-block-end: 0.35rem;
}

.popover-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.popover-links a {
  display: flex;
  align-items: center;
  min-height: 2.6rem;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-control);
  color: var(--content-primary);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
}

@media (hover: hover) and (pointer: fine) {
  .popover-links a:hover {
    background: var(--surface-subtle);
  }
}

.popover-logout-form {
  border-block-start: 1px solid var(--line-default);
  margin-block-start: 0.35rem;
  padding-block-start: 0.35rem;
}

/* ==========================================================================
   Tarjetas Concéntricas, Badges y Banners Flash
   ========================================================================== */

.card {
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  border-radius: var(--radius-card);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), var(--shadow-sm);
  padding: 1.25rem;
  transition: transform 180ms var(--ease-out), box-shadow 180ms var(--ease-out), border-color 180ms var(--ease-out);
}

.card-concentric {
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  border-radius: var(--radius-card);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), var(--shadow-sm);
  padding: var(--card-pad);
  transition: transform 180ms var(--ease-out), box-shadow 180ms var(--ease-out), border-color 180ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .card:hover,
  .card-concentric:hover {
    border-color: var(--line-strong);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), var(--shadow-md);
  }
}

.card-inner-surface {
  border-radius: var(--radius-control);
  padding: 1rem;
  background: var(--surface-subtle);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.3;
  background: var(--surface-subtle);
  color: var(--content-secondary);
  border: 1px solid var(--line-default);
}

.badge-accent {
  background: var(--fill-accent-subtle);
  color: var(--content-accent);
  border-color: transparent;
}

.badge-success {
  background: var(--status-success-bg);
  color: var(--status-success);
  border-color: transparent;
}

.badge-subtle {
  font-size: 0.75rem;
  color: var(--content-muted);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-pill);
  background: var(--surface-subtle);
}

.flash-stack {
  margin-block-start: 1rem;
  display: grid;
  gap: 0.5rem;
}

.flash-banner {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--line-default);
  background: var(--surface-default);
  box-shadow: var(--shadow-sm);
  font-size: 0.9375rem;
  font-weight: 500;
}

.flash-success {
  background: var(--status-success-bg);
  color: var(--status-success);
  border-color: currentColor;
}

.flash-error {
  background: var(--status-danger-bg);
  color: var(--status-danger);
  border-color: currentColor;
}

.flash-info {
  background: var(--status-info-bg);
  color: var(--status-info);
  border-color: currentColor;
}

.toast-region {
  position: fixed;
  inset-block-end: max(1rem, env(safe-area-inset-bottom));
  inset-inline-end: 1rem;
  z-index: 90;
  display: grid;
  gap: 0.5rem;
  pointer-events: none;
}

.toast-item {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-control);
  background: var(--fill-primary);
  color: var(--content-inverse);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  font-weight: 550;
  animation: toast-in 180ms var(--ease-out);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(0.5rem) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ==========================================================================
   Formularios Accesibles (:user-invalid + pistas encima del input)
   ========================================================================== */

.form-stack {
  display: grid;
  gap: 1.25rem;
}

.field {
  display: grid;
  gap: 0.35rem;
}

.field label,
.field-label {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--content-primary);
}

.field-hint {
  display: block;
  font-size: 0.8125rem;
  color: var(--content-muted);
  line-height: 1.4;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="url"],
select,
textarea {
  width: 100%;
  min-height: 3rem;
  padding: 0.65rem 0.875rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--line-input);
  background: var(--surface-default);
  color: var(--content-primary);
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.4;
  transition: border-color 140ms var(--ease-out);
}

textarea {
  min-height: 5.5rem;
  resize: vertical;
}

@media (pointer: coarse) {
  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="search"],
  select {
    min-height: 3.25rem;
  }
}

input::placeholder,
textarea::placeholder {
  color: var(--content-muted);
  opacity: 0.85;
}

.field-error {
  display: none;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8125rem;
  font-weight: 550;
  color: var(--status-danger);
  margin-block-start: 0.15rem;
}

:is(input, select, textarea):is(:user-invalid, .user-invalid-fallback) {
  border-color: var(--status-danger);
  background-color: var(--status-danger-bg);
}

:is(input, select, textarea):is(:user-invalid, .user-invalid-fallback) ~ .field-error,
.password-input-wrap:has(input:is(:user-invalid, .user-invalid-fallback)) ~ .field-error {
  display: flex;
}

.password-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.password-input-wrap input {
  padding-inline-end: 5.75rem;
}

.password-toggle-btn {
  position: absolute;
  inset-inline-end: 0.375rem;
  min-height: 2.25rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-default);
  background: var(--surface-subtle);
  color: var(--content-primary);
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
}

/* ==========================================================================
   Native <dialog> y [popover] — Animaciones Top-Layer y Contención de Scroll
   ========================================================================== */

dialog {
  max-width: min(36rem, calc(100vw - 2rem));
  width: 100%;
  padding: 0;
  border: 1px solid var(--line-default);
  border-radius: var(--radius-card);
  background: var(--surface-elevated);
  color: var(--content-primary);
  box-shadow: var(--shadow-lg);
}

dialog.dialog-wide {
  max-width: min(46rem, calc(100vw - 2rem));
}

dialog:modal {
  overscroll-behavior: contain;
}

dialog::backdrop {
  overflow: hidden;
  overscroll-behavior: contain;
  background-color: rgb(0 0 0 / 0);
  transition-property: background-color, display, overlay;
  transition-duration: 180ms;
  transition-timing-function: var(--ease-out);
  transition-behavior: allow-discrete;
}

dialog,
[popover] {
  opacity: 0;
  transform: scale(0.95);
  transition-property: opacity, transform, display, overlay;
  transition-duration: 180ms;
  transition-timing-function: var(--ease-out);
  transition-behavior: allow-discrete;
}

[popover]:is(:popover-open, .\:popover-open) {
  display: block;
}

:is(dialog[open], [popover]:is(:popover-open, .\:popover-open)):where(:not([data-closing])) {
  opacity: 1;
  transform: scale(1);

  @starting-style {
    opacity: 0;
    transform: scale(0.95);
  }

  &::backdrop {
    background-color: rgb(0 0 0 / 0.5);

    @starting-style {
      background-color: rgb(0 0 0 / 0);
    }
  }
}

.dialog-body {
  padding: 1.5rem;
}

.dialog-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-block-end: 1rem;
}

.dialog-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-block-start: 1.5rem;
}

/* ==========================================================================
   Portada Moderna (Hero Atmosférico + Consola PIN + Bento) y Grid
   ========================================================================== */

.hero-backdrop-wrap {
  position: relative;
  isolation: isolate;
  border-block-end: 1px solid var(--line-default);
  background-image:
    radial-gradient(48rem 26rem at 12% 0%, var(--hero-glow-a), transparent 72%),
    radial-gradient(38rem 24rem at 88% 18%, var(--hero-glow-b), transparent 72%),
    radial-gradient(circle, var(--grid-dot-color) 1px, transparent 1.2px);
  background-size: 100% 100%, 100% 100%, 24px 24px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.95fr);
  gap: 2.5rem;
  align-items: center;
  padding-block: 2.75rem 3rem;
}

.hero-copy-col,
.pin-join-shell {
  min-width: 0;
}

@media (max-width: 56rem) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.75rem;
    padding-block: 1.75rem 2.25rem;
  }
}

.hero-eyebrow {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-block-end: 1rem;
}

.live-pulse-dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: currentColor;
}

.hero-author-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.22rem 0.65rem;
  border-radius: var(--radius-pill);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  font-size: 0.8125rem;
  color: var(--content-secondary);
  box-shadow: var(--shadow-sm);
}

.hero-author-tag strong {
  color: var(--content-primary);
  font-family: var(--font-mono);
}

.hero-title-accent {
  color: var(--content-accent);
}

.hero-lead {
  font-size: clamp(1.05rem, 1rem + 0.35vw, 1.2rem);
  color: var(--content-secondary);
  margin-block-end: 1.65rem;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-block-end: 1.85rem;
}

.stats-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.stat-tile {
  padding: 0.95rem 1.05rem;
  border-radius: var(--radius-control);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  box-shadow: var(--shadow-sm);
}

.stat-value {
  display: block;
  font-size: 1.45rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.025em;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--content-muted);
}

@media (max-width: 30rem) {
  .stat-tile {
    padding: 0.75rem 0.65rem;
  }

  .stat-value {
    font-size: 1.25rem;
  }

  .stat-label {
    font-size: 0.75rem;
  }
}

/* Consola PIN inspirada en kahoot.it pero elevada con acabado moderno */
.pin-join-shell {
  padding: var(--card-pad);
  border-radius: calc(var(--radius-card) + 0.15rem);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  box-shadow: var(--shadow-lg);
}

.pin-join-inner {
  padding: 1.5rem;
  border-radius: var(--radius-card);
  background: var(--surface-subtle);
  border: 1px solid var(--line-default);
}

.pin-console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-block-end: 1rem;
}

.pin-console-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.pin-console-shapes {
  display: inline-grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  padding: 0.3rem;
  border-radius: 0.5rem;
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  font-size: 0.55rem;
  line-height: 1;
}

.mini-shape {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 0.75rem;
  height: 0.75rem;
}
.shape-t { color: var(--choice-triangle); }
.shape-d { color: var(--choice-diamond); }
.shape-c { color: var(--choice-circle); }
.shape-s { color: var(--choice-square); }

.pin-console-footer {
  margin-block-start: 1rem;
  padding-block-start: 0.85rem;
  border-block-start: 1px solid var(--line-default);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.pin-input-large {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 1.625rem !important;
  font-weight: 800;
  letter-spacing: 0.18em;
  font-variant-numeric: tabular-nums;
  min-height: 3.75rem !important;
  background: var(--surface-default);
}

.feature-bento-card {
  transition: transform 180ms var(--ease-out), border-color 180ms var(--ease-out), box-shadow 180ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .feature-bento-card:hover {
    transform: translateY(-2px);
    border-color: var(--line-strong);
    box-shadow: var(--shadow-md);
  }
}

/* Grid de Cuestionarios (Descubre / Biblioteca) */
.quiz-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(19.5rem, 100%), 1fr));
  gap: 1.25rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.quiz-card {
  display: flex;
  flex-direction: column;
  padding: var(--card-pad);
  border-radius: var(--radius-card);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  box-shadow: var(--shadow-sm);
  transition: transform 180ms var(--ease-out), box-shadow 180ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .quiz-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }
}

.quiz-cover {
  position: relative;
  height: 7.5rem;
  border-radius: var(--radius-control);
  padding: 0.875rem 1rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: #FFFFFF;
  outline: 1px solid var(--media-outline);
  outline-offset: -1px;
  overflow: hidden;
}

.cover-indigo {
  background-color: #1E3A8A;
  background-image: linear-gradient(135deg var(--in-oklab), #1E3A8A, #1D4ED8);
}
.cover-emerald {
  background-color: #14532D;
  background-image: linear-gradient(135deg var(--in-oklab), #14532D, #15803D);
}
.cover-amber {
  background-color: #7C2D12;
  background-image: linear-gradient(135deg var(--in-oklab), #7C2D12, #B45309);
}
.cover-crimson {
  background-color: #881337;
  background-image: linear-gradient(135deg var(--in-oklab), #881337, #BE123C);
}
.cover-slate {
  background-color: #1E293B;
  background-image: linear-gradient(135deg var(--in-oklab), #0F172A, #334155);
}

.quiz-cover-shapes {
  position: absolute;
  inset-inline-end: -0.5rem;
  inset-block-end: -0.75rem;
  opacity: 0.16;
  pointer-events: none;
}

.quiz-cover-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  z-index: 1;
}

.quiz-cover-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-pill);
  background: rgb(0 0 0 / 0.35);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.fav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgb(255 255 255 / 0.25);
  background: rgb(0 0 0 / 0.35);
  color: #FFFFFF;
  cursor: pointer;
  transition: transform 140ms var(--ease-out);
}

.fav-btn:active {
  transform: scale(0.92);
}

.fav-btn[aria-pressed="true"] {
  background: #FFFFFF;
  color: #C81E3A;
}

.quiz-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 0.85rem 0.65rem 0.5rem;
}

.quiz-card-title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-block-end: 0.35rem;
  line-height: 1.3;
}

.quiz-card-desc {
  font-size: 0.875rem;
  color: var(--content-secondary);
  margin-block-end: 0.85rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.quiz-card-meta {
  margin-block-start: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--content-muted);
  padding-block-end: 0.75rem;
}

.quiz-card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 0.5rem;
  padding: 0.25rem 0.35rem 0.35rem;
}

/* ==========================================================================
   Barra de Búsqueda (<search>) y Estados Vacíos
   ========================================================================== */

.filter-bar {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: 0.75rem;
  align-items: end;
  padding: 1rem;
  border-radius: var(--radius-card);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  box-shadow: var(--shadow-sm);
  margin-block-end: 1.5rem;
}

@media (max-width: 52rem) {
  .filter-bar {
    grid-template-columns: 1fr;
  }
}

.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  border-radius: var(--radius-card);
  background: var(--surface-default);
  border: 1px dashed var(--line-strong);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.empty-state p {
  margin-inline: auto;
  color: var(--content-secondary);
}

/* ==========================================================================
   Los 4 Mosaicos Geométricos de Respuesta (Accesibilidad No-Solo-Color)
   ========================================================================== */

.choices-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.875rem;
}

@media (max-width: 38rem) {
  .choices-grid {
    grid-template-columns: 1fr;
  }
}

.choice-tile {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-height: 5rem;
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius-control);
  border: 2px solid rgb(255 255 255 / 0.16);
  color: #FFFFFF;
  font-family: inherit;
  font-size: clamp(1rem, 0.95rem + 0.35vw, 1.1875rem);
  font-weight: 650;
  line-height: 1.25;
  text-align: start;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: transform 140ms var(--ease-out), opacity 140ms var(--ease-out);
}

.choice-tile:active:not(:disabled) {
  transform: scale(0.97);
}

.choice-triangle { background-color: var(--choice-triangle); }
.choice-diamond  { background-color: var(--choice-diamond); }
.choice-circle   { background-color: var(--choice-circle); }
.choice-square   { background-color: var(--choice-square); }

@media (hover: hover) and (pointer: fine) {
  .choice-triangle:hover:not(:disabled) { background-color: var(--choice-triangle-hover); }
  .choice-diamond:hover:not(:disabled)  { background-color: var(--choice-diamond-hover); }
  .choice-circle:hover:not(:disabled)   { background-color: var(--choice-circle-hover); }
  .choice-square:hover:not(:disabled)   { background-color: var(--choice-square-hover); }
}

.choice-tile.is-selected {
  outline: 4px solid var(--content-primary);
  outline-offset: 2px;
}

.choice-tile.is-dimmed {
  opacity: 0.32;
}

.choice-tile.is-correct-reveal {
  outline: 4px solid var(--status-success);
  outline-offset: 2px;
}

.choice-shape-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  background: rgb(0 0 0 / 0.22);
  flex-shrink: 0;
}

.shape-svg {
  width: 1.35rem;
  height: 1.35rem;
}

.choice-text {
  flex: 1;
}

.choice-keycap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.75rem;
  height: 1.75rem;
  padding-inline: 0.4rem;
  border-radius: 0.4rem;
  background: rgb(0 0 0 / 0.25);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* Pad gigante para el controlador del jugador (play.php) */
.controller-pad-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.875rem;
  flex: 1;
  min-height: 19rem;
}

.controller-pad-grid .choice-tile {
  min-height: 8.5rem;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 1.25rem;
}

.controller-pad-grid .choice-shape-badge {
  width: 3.5rem;
  height: 3.5rem;
}

.controller-pad-grid .shape-svg {
  width: 2rem;
  height: 2rem;
}

/* ==========================================================================
   Escenarios de Juego en Vivo (host.php y play.php) — 100dvh + GPU Progress
   ========================================================================== */

.game-stage-body {
  min-height: 100dvh;
}

.game-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  background: var(--header-glass);
  background: color-mix(in oklab, var(--surface-default) 82%, transparent);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-block-end: 1px solid var(--line-default);
  flex-wrap: wrap;
}

.game-stage-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
  width: min(100% - 2rem, 72rem);
  margin-inline: auto;
  padding-block: 1.25rem;
  padding-block-end: max(1.25rem, env(safe-area-inset-bottom));
}

.pin-hero-box {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 1.5rem 1.75rem;
  border-radius: var(--radius-card);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  box-shadow: var(--shadow-md);
}

.pin-digits-giant {
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 2rem + 3vw, 4.25rem);
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--content-primary);
}

/* Barra de progreso acelerada en GPU con transform: scaleX() */
.timer-track {
  width: 100%;
  height: 0.625rem;
  border-radius: var(--radius-pill);
  background: var(--surface-sunken);
  overflow: hidden;
}

.timer-bar-fill {
  width: 100%;
  height: 100%;
  background: var(--fill-accent);
  transform-origin: left center;
  transform: scaleX(var(--progress, 1));
  transition: transform 120ms linear;
  will-change: transform;
}

.lobby-players-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.player-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-pill);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
  font-size: 0.9375rem;
}

/* Histograma de votos en Reveal */
.histogram-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.875rem;
  align-items: end;
  min-height: 9.5rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-card);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
}

.histogram-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
}

.histogram-bar-wrap {
  width: 100%;
  height: 5.5rem;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  background: var(--surface-subtle);
  border-radius: var(--radius-sm);
  padding: 0.25rem;
}

.histogram-bar {
  width: 100%;
  height: 100%;
  border-radius: 0.35rem;
  transform-origin: bottom center;
  transform: scaleY(var(--bar-scale, 0.08));
  transition: transform 240ms var(--ease-out);
}

/* Podio de 3 escalones */
.podium-stage {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  align-items: end;
  max-width: 44rem;
  margin-inline: auto;
  width: 100%;
  padding-block-start: 1rem;
}

@media (max-width: 36rem) {
  .podium-stage {
    grid-template-columns: 1fr;
  }
}

.podium-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.25rem 1rem;
  border-radius: var(--radius-card);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  box-shadow: var(--shadow-md);
}

.podium-rank-1 {
  min-height: 15rem;
  border-color: var(--fill-accent);
  box-shadow: var(--shadow-lg);
}

.podium-rank-2 {
  min-height: 12.25rem;
}

.podium-rank-3 {
  min-height: 10.75rem;
}

.leaderboard-list {
  display: grid;
  gap: 0.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.leaderboard-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-control);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Estudio Creador de 3 Paneles (editor.php)
   ========================================================================== */

.studio-layout {
  display: grid;
  grid-template-columns: 15.5rem minmax(0, 1fr) 18.5rem;
  gap: 1.25rem;
  align-items: start;
  padding-block: 1.25rem 2.5rem;
}

@media (max-width: 68rem) {
  .studio-layout {
    grid-template-columns: 1fr;
  }
}

.slide-rail {
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  border-radius: var(--radius-card);
  padding: 0.75rem;
  box-shadow: var(--shadow-sm);
}

.slide-list {
  display: grid;
  gap: 0.5rem;
  list-style: none;
  margin: 0 0 0.75rem;
  padding: 0;
  max-height: 62dvh;
  overflow-y: auto;
}

.slide-thumb-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--line-default);
  background: var(--surface-subtle);
  color: var(--content-primary);
  font-family: inherit;
  font-size: 0.875rem;
  text-align: start;
  cursor: pointer;
}

.slide-thumb-btn.is-active {
  background: var(--fill-accent-subtle);
  border-color: var(--fill-accent);
  font-weight: 650;
}

.option-editor-card {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 0.85rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--line-default);
  background: var(--surface-subtle);
}

.option-editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.shape-dot-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-pill);
  color: #FFFFFF;
  font-size: 0.8125rem;
  font-weight: 650;
}

/* ==========================================================================
   Panel (Dashboard), Pestañas y Tablas de Informes Semánticas
   ========================================================================== */

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12.5rem, 1fr));
  gap: 1rem;
  margin-block-end: 1.75rem;
}

.kpi-card {
  padding: 1.15rem 1.25rem;
  border-radius: var(--radius-card);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  box-shadow: var(--shadow-sm);
}

.kpi-number {
  font-size: 1.875rem;
  font-weight: 750;
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-variant-numeric: tabular-nums;
  margin-block-start: 0.25rem;
}

.tabs-bar {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  padding: 0.25rem;
  border-radius: var(--radius-control);
  background: var(--surface-subtle);
  border: 1px solid var(--line-default);
  margin-block-end: 1.5rem;
}

.tab-btn {
  min-height: 2.5rem;
  padding: 0.4rem 0.95rem;
  border-radius: 0.55rem;
  border: 0;
  background: transparent;
  color: var(--content-secondary);
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
}

.tab-btn[aria-selected="true"] {
  background: var(--surface-default);
  color: var(--content-primary);
  box-shadow: var(--shadow-sm);
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-card);
  border: 1px solid var(--line-default);
  background: var(--surface-default);
  box-shadow: var(--shadow-sm);
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

table.data-table caption {
  text-align: start;
  padding: 1rem 1.25rem 0.5rem;
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--content-primary);
}

table.data-table th,
table.data-table td {
  padding: 0.85rem 1.25rem;
  border-block-end: 1px solid var(--line-default);
  text-align: start;
}

table.data-table th {
  font-size: 0.8125rem;
  font-weight: 650;
  color: var(--content-secondary);
  background: var(--surface-subtle);
}

table.data-table tr:last-child td {
  border-block-end: 0;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  margin-block-start: auto;
  border-block-start: 1px solid var(--line-default);
  background: var(--surface-default);
  padding-block: 1.75rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.footer-logo-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-block-end: 0.45rem;
}

.author-credit-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.18rem 0.6rem;
  border-radius: var(--radius-pill);
  background: var(--fill-accent-subtle);
  color: var(--content-accent);
  font-size: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 150ms ease, transform 150ms ease;
}

.author-credit-pill:hover,
.author-credit-pill:focus-visible {
  background: #DBEAFE;
  text-decoration: underline;
  transform: translateY(-1px);
}

.author-credit-pill strong {
  font-family: var(--font-mono);
}

.author-credit-dot {
  width: 0.38rem;
  height: 0.38rem;
  border-radius: 50%;
  background: currentColor;
}

.footer-copy {
  margin: 0;
  font-size: 0.875rem;
  color: var(--content-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--content-secondary);
  text-decoration: none;
}

@media (hover: hover) and (pointer: fine) {
  .footer-links a:hover {
    color: var(--content-primary);
    text-decoration: underline;
  }
}

/* ==========================================================================
   Vistas Públicas Interactivas 1.0 (Spotlight, Arena en Vivo, Catálogo y Auth)
   ========================================================================== */

/* 1. Revelación interactiva por puntero (interactive-content-reveal) */
.spotlight-card {
  position: relative;
  overflow: clip;
  isolation: isolate;
}

.spotlight-card > :not(.spotlight-layer) {
  position: relative;
  z-index: 1;
}

.spotlight-layer {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), color-mix(in oklab, var(--fill-accent) 20%, transparent), transparent 72%),
    radial-gradient(circle, color-mix(in oklab, var(--fill-accent) 34%, transparent) 1px, transparent 1.25px);
  background-size: 100% 100%, 20px 20px;
  transition: --spot-inner 220ms ease-in-out, --spot-outer 220ms ease-in-out;
  -webkit-mask-image: radial-gradient(
    circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    black var(--spot-inner, 0%),
    transparent var(--spot-outer, 0%)
  );
  mask-image: radial-gradient(
    circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    black var(--spot-inner, 0%),
    transparent var(--spot-outer, 0%)
  );
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
}

@media (hover: hover) and (pointer: fine) {
  .spotlight-card:hover > .spotlight-layer {
    --spot-inner: 42px;
    --spot-outer: 230px;
  }

  .spotlight-card:hover > .spotlight-layer-hero {
    --spot-inner: 96px;
    --spot-outer: 390px;
  }
}

/* 2. Animaciones de entrada guiadas por scroll (scroll-entry-exit-effects) */
@media (prefers-reduced-motion: no-preference) {
  @supports ((animation-timeline: view()) and (animation-range: entry)) {
    @keyframes yachay-scroll-entry {
      from {
        opacity: 0.2;
        transform: translateY(18px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .scroll-reveal-item {
      animation: yachay-scroll-entry auto linear backwards;
      animation-timeline: view();
      animation-range: entry 0% cover 22%;
    }
  }

  .scroll-reveal-fallback {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 320ms var(--ease-out), transform 320ms var(--ease-out);
  }

  .scroll-reveal-fallback.is-in-view {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 3. Mejoras táctiles del Hero, KPIs interactivos y Sala Activa */
.stat-tile-interactive {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: transform 160ms var(--ease-out), border-color 160ms var(--ease-out), box-shadow 160ms var(--ease-out);
}

.stat-tile-interactive:active {
  transform: scale(0.98);
}

@media (hover: hover) and (pointer: fine) {
  .stat-tile-interactive:hover {
    transform: translateY(-2px);
    border-color: var(--fill-accent);
    box-shadow: var(--shadow-md);
  }

  .stat-tile-interactive:hover .stat-value {
    color: var(--content-accent);
  }
}

.active-room-banner {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.65rem 0.85rem;
  margin-block-end: 1rem;
  border-radius: var(--radius-control);
  border: 1px solid color-mix(in oklab, var(--status-success) 38%, var(--line-default));
  background: var(--surface-default);
  color: var(--content-primary);
  font-family: inherit;
  text-align: start;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 140ms var(--ease-out), border-color 140ms var(--ease-out);
}

.active-room-banner:active {
  transform: scale(0.98);
}

@media (hover: hover) and (pointer: fine) {
  .active-room-banner:hover {
    border-color: var(--status-success);
  }
}

.active-room-copy {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  font-size: 0.8125rem;
}

.active-room-copy strong {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.active-room-copy span {
  color: var(--content-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.active-room-cta {
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-pill);
  background: var(--status-success-bg);
  color: var(--status-success);
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.feature-bento-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.bento-card-link {
  margin-block-start: auto;
  padding-block-start: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.875rem;
  font-weight: 650;
  text-decoration: none;
  color: var(--content-accent);
}

@media (hover: hover) and (pointer: fine) {
  .bento-card-link:hover {
    text-decoration: underline;
  }
}

/* 4. Arena Interactiva en Vivo en index.php + Anchor Positioning Tab Underline */
.arena-hud-pills {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.arena-shell {
  box-shadow: var(--shadow-md);
}

.arena-inner {
  padding: clamp(1.1rem, 2.2vw, 1.65rem);
  border-radius: calc(var(--radius-card) - 0.2rem);
  background: var(--surface-subtle);
  border: 1px solid var(--line-default);
}

.arena-top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
  margin-block-end: 0.85rem;
}

.arena-tablist {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  list-style: none;
  margin: 0;
  padding: 0.25rem;
  border-radius: var(--radius-control);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
}

.arena-tablist li.is-active-anchor {
  anchor-name: --arena-active-tab;
}

.arena-tablist::before {
  content: "";
  position: absolute;
  position-anchor: --arena-active-tab;
  inset-block-start: calc(anchor(bottom) - 3px);
  inset-inline-start: anchor(left);
  inset-inline-end: anchor(right);
  block-size: 3px;
  border-radius: var(--radius-pill);
  background: var(--fill-accent);
  pointer-events: none;
  z-index: 2;
}

@media (prefers-reduced-motion: no-preference) {
  .arena-tablist::before {
    transition: inset 200ms var(--ease-out);
  }
}

@supports not (position-anchor: auto) {
  .arena-tablist::before {
    display: none;
  }

  .arena-tablist li.is-active-anchor {
    border-bottom: 3px solid var(--fill-accent);
  }
}

.arena-tab-btn {
  min-height: 2.5rem;
  padding: 0.4rem 0.85rem;
  border-radius: 0.55rem;
  border: 0;
  background: transparent;
  color: var(--content-secondary);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: color 140ms var(--ease-out), background-color 140ms var(--ease-out);
}

.arena-tab-btn[aria-selected="true"] {
  background: var(--fill-accent-subtle);
  color: var(--content-accent);
}

@media (hover: hover) and (pointer: fine) {
  .arena-tab-btn:hover:not([aria-selected="true"]) {
    color: var(--content-primary);
    background: var(--surface-subtle);
  }
}

.arena-clock-wrap {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.arena-seconds-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3.75rem;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-pill);
  background: var(--surface-default);
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--content-primary);
}

.arena-prompt-box {
  padding: 1.2rem 1.35rem;
  margin-block-end: 1rem;
  border-radius: var(--radius-control);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  box-shadow: var(--shadow-sm);
}

.arena-prompt-box .stage-question-title {
  margin: 0;
  font-size: clamp(1.125rem, 1rem + 0.55vw, 1.375rem);
}

.arena-type-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: center;
  margin-block-start: 0.5rem;
}

@media (max-width: 34rem) {
  .arena-type-row {
    grid-template-columns: 1fr;
  }
}

.choice-tile.is-wrong-reveal {
  outline: 4px solid var(--status-danger);
  outline-offset: 2px;
}

.arena-feedback {
  margin-block-start: 1rem;
  padding: 0.95rem 1.15rem;
  border-radius: var(--radius-control);
  background: var(--surface-default);
  border: 1px solid var(--line-strong);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
  box-shadow: var(--shadow-sm);
}

.arena-feedback[data-state="correct"] {
  border-color: var(--status-success);
  background: color-mix(in oklab, var(--status-success-bg) 42%, var(--surface-default));
}

.arena-feedback[data-state="wrong"] {
  border-color: var(--status-danger);
  background: color-mix(in oklab, var(--status-danger-bg) 38%, var(--surface-default));
}

.arena-feedback-copy {
  flex: 1;
  min-width: 14rem;
  display: grid;
  gap: 0.2rem;
}

/* 5. Tarjetas de Cuestionario Mejoradas, Modo Compacto y Vista Previa Interactiva */
.quiz-cover-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  z-index: 1;
}

.quiz-quickpeek-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  min-height: 1.85rem;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgb(255 255 255 / 0.28);
  background: rgb(0 0 0 / 0.38);
  color: #FFFFFF;
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 650;
  cursor: pointer;
  transition: background-color 140ms var(--ease-out), transform 140ms var(--ease-out);
}

.quiz-quickpeek-pill:active {
  transform: scale(0.95);
}

@media (hover: hover) and (pointer: fine) {
  .quiz-quickpeek-pill:hover {
    background: rgb(255 255 255 / 0.94);
    color: #141413;
  }
}

.quiz-title-trigger {
  appearance: none;
  border: 0;
  padding: 0;
  margin: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: start;
  cursor: pointer;
  transition: color 140ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .quiz-title-trigger:hover {
    color: var(--content-accent);
  }
}

.quiz-author-line {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  color: var(--content-secondary);
}

.quiz-author-line strong {
  font-family: var(--font-mono);
  font-weight: 650;
  color: var(--content-primary);
}

.quiz-author-dot {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--fill-accent);
}

.quiz-plays-badge {
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-pill);
  background: var(--surface-subtle);
  border: 1px solid var(--line-default);
  font-size: 0.75rem;
  font-weight: 600;
}

.quiz-grid.is-compact {
  grid-template-columns: repeat(auto-fill, minmax(25rem, 1fr));
  gap: 0.85rem;
}

@media (max-width: 32rem) {
  .quiz-grid.is-compact {
    grid-template-columns: 1fr;
  }
}

.quiz-grid.is-compact .quiz-cover {
  height: 4.5rem;
  flex-direction: row;
  align-items: center;
  padding: 0.65rem 0.85rem;
}

.quiz-grid.is-compact .quiz-card-desc {
  -webkit-line-clamp: 1;
  margin-block-end: 0.5rem;
}

/* Lista interactiva dentro de #quiz-preview-dialog */
.preview-list-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-block-end: 0.65rem;
}

.preview-questions-list {
  display: grid;
  gap: 0.65rem;
  max-height: 50dvh;
  overflow-y: auto;
  padding: 0.1rem;
  margin: 0;
  list-style: none;
}

.preview-q-item {
  border-radius: var(--radius-control);
  border: 1px solid var(--line-default);
  background: var(--surface-subtle);
  padding: 0.85rem 1rem;
  display: grid;
  gap: 0.6rem;
}

.preview-q-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.65rem;
}

.preview-q-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.45rem;
}

@media (max-width: 34rem) {
  .preview-q-options {
    grid-template-columns: 1fr;
  }
}

.preview-opt-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.5rem;
  padding: 0.45rem 0.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-default);
  background: var(--surface-default);
  color: var(--content-primary);
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 550;
  text-align: start;
  cursor: pointer;
  transition: border-color 140ms var(--ease-out), background-color 140ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .preview-opt-btn:hover:not(:disabled) {
    border-color: var(--fill-accent);
  }
}

.preview-opt-btn.is-right {
  border-color: var(--status-success);
  background: var(--status-success-bg);
  color: var(--status-success);
  font-weight: 700;
}

.preview-opt-btn.is-wrong {
  border-color: var(--status-danger);
  background: var(--status-danger-bg);
  color: var(--status-danger);
}

.preview-q-exp {
  margin: 0;
  padding-block-start: 0.35rem;
  border-block-start: 1px dashed var(--line-default);
  font-size: 0.8125rem;
  color: var(--content-secondary);
}

/* 6. Banners Públicos, Chips de Categoría y Conmutador de Vista (discover.php / study.php) */
.public-hero-banner {
  padding: clamp(1.25rem, 2.5vw, 1.85rem);
  margin-block-end: 1.5rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--line-default);
  background: var(--surface-default);
  background-image: radial-gradient(36rem 18rem at 0% 0%, var(--hero-glow-a), transparent 72%);
  box-shadow: var(--shadow-sm);
}

.public-hero-content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.catalog-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
  margin-block-end: 1.25rem;
}

.catalog-meta-right {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.chip-filter-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-block-end: 1.15rem;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 2.35rem;
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-default);
  background: var(--surface-default);
  color: var(--content-secondary);
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 140ms var(--ease-out), border-color 140ms var(--ease-out), color 140ms var(--ease-out), transform 140ms var(--ease-out);
}

.filter-chip:active {
  transform: scale(0.96);
}

@media (hover: hover) and (pointer: fine) {
  .filter-chip:hover {
    border-color: var(--line-strong);
    color: var(--content-primary);
  }
}

.filter-chip.is-active,
.filter-chip[aria-pressed="true"] {
  background: var(--fill-primary);
  border-color: var(--fill-primary);
  color: var(--content-inverse);
}

.view-mode-switch {
  display: inline-flex;
  padding: 0.2rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--line-default);
  background: var(--surface-default);
}

.view-mode-btn {
  min-height: 2.1rem;
  padding: 0.25rem 0.7rem;
  border-radius: calc(var(--radius-control) - 0.15rem);
  border: 0;
  background: transparent;
  color: var(--content-secondary);
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
}

.view-mode-btn.is-active,
.view-mode-btn[aria-pressed="true"] {
  background: var(--surface-subtle);
  color: var(--content-primary);
}

.study-quick-search {
  min-width: min(18rem, 100%);
}

.study-quick-search input {
  min-height: 2.55rem;
  font-size: 0.875rem;
}

.study-shortcuts-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin-block-end: 0.75rem;
  font-size: 0.8125rem;
  color: var(--content-muted);
}

/* 7. Vista Pública Unirse con PIN (play.php) */
.play-join-wrap {
  width: 100%;
  max-width: 34rem;
  margin-inline: auto;
}

.player-live-preview {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.75rem 0.95rem;
  margin-block-end: 1rem;
  border-radius: var(--radius-control);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  box-shadow: var(--shadow-sm);
}

.player-preview-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-pill);
  background: var(--fill-accent-subtle);
  font-size: 1.4rem;
  flex-shrink: 0;
}

.player-preview-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.player-preview-meta strong {
  font-size: 0.9375rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.player-preview-meta span {
  font-size: 0.75rem;
  color: var(--content-muted);
}

.open-rooms-strip {
  display: grid;
  gap: 0.45rem;
  margin-block-end: 1rem;
}

.open-rooms-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.btn-inline-action {
  appearance: none;
  border: 1px solid var(--line-default);
  border-radius: var(--radius-pill);
  background: var(--surface-default);
  color: var(--content-accent);
  padding: 0.2rem 0.65rem;
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 650;
  cursor: pointer;
  transition: background-color 140ms var(--ease-out), border-color 140ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .btn-inline-action:hover {
    border-color: var(--fill-accent);
    background: var(--fill-accent-subtle);
  }
}

.avatar-picker-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.5rem;
}

.avatar-pick-tile {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 3.1rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--line-default);
  background: var(--surface-default);
  cursor: pointer;
  transition: transform 140ms var(--ease-out), border-color 140ms var(--ease-out), background-color 140ms var(--ease-out);
}

.avatar-pick-tile input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
}

.avatar-pick-emoji {
  font-size: 1.4rem;
  line-height: 1;
}

.avatar-pick-tile:has(input:checked) {
  border-color: var(--fill-accent);
  background: var(--fill-accent-subtle);
  box-shadow: 0 0 0 1px var(--fill-accent);
}

.avatar-pick-tile:has(input:focus-visible) {
  outline: 3px solid var(--fill-accent);
  outline-offset: 2px;
}

/* 8. Vistas Divididas de Autenticación (login.php / register.php) */
.auth-split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
  gap: 1.75rem;
  align-items: start;
  max-width: 64rem;
  margin-inline: auto;
}

@media (max-width: 56rem) {
  .auth-split-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.auth-showcase-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.75rem;
  padding: clamp(1.5rem, 3vw, 2.15rem);
  border-radius: var(--radius-card);
  border: 1px solid var(--line-default);
  background: var(--surface-default);
  background-image: radial-gradient(34rem 20rem at 0% 0%, var(--hero-glow-a), transparent 75%);
  box-shadow: var(--shadow-md);
}

.auth-feature-list {
  display: grid;
  gap: 0.75rem;
}

.auth-feature-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-control);
  background: var(--surface-subtle);
  border: 1px solid var(--line-default);
  font-size: 0.875rem;
}

.auth-showcase-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-block-start: 1rem;
  border-block-start: 1px solid var(--line-default);
}

.demo-account-grid {
  display: grid;
  gap: 0.55rem;
}

.demo-account-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.5rem;
  align-items: center;
}

.demo-fill-btn {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.75rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--line-default);
  background: var(--surface-subtle);
  color: var(--content-primary);
  font-family: inherit;
  font-size: 0.8125rem;
  text-align: start;
  cursor: pointer;
  transition: border-color 140ms var(--ease-out), background-color 140ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .demo-fill-btn:hover {
    border-color: var(--fill-accent);
  }
}

.demo-account-row.is-selected .demo-fill-btn {
  border-color: var(--fill-accent);
  background: var(--fill-accent-subtle);
}

.demo-role-tag {
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-pill);
  background: var(--surface-default);
  border: 1px solid var(--line-default);
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--content-secondary);
}

.demo-fill-btn code {
  margin-inline-start: auto;
  font-size: 0.75rem;
  color: var(--content-muted);
}

@media (max-width: 34rem) {
  .demo-fill-btn code {
    display: none;
  }
}

.role-picker-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

@media (max-width: 32rem) {
  .role-picker-grid {
    grid-template-columns: 1fr;
  }
}

.role-pick-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--line-default);
  background: var(--surface-subtle);
  cursor: pointer;
  transition: border-color 140ms var(--ease-out), background-color 140ms var(--ease-out);
}

.role-pick-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
}

.role-pick-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--content-primary);
}

.role-pick-sub {
  font-size: 0.75rem;
  color: var(--content-muted);
}

.role-pick-card:has(input:checked) {
  border-color: var(--fill-accent);
  background: var(--fill-accent-subtle);
  box-shadow: 0 0 0 1px var(--fill-accent);
}

.role-pick-card:has(input:focus-visible) {
  outline: 3px solid var(--fill-accent);
  outline-offset: 2px;
}

.pw-strength-meter {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-block-start: 0.35rem;
}

.pw-strength-bars {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.3rem;
}

.pw-strength-bars span {
  height: 0.35rem;
  border-radius: var(--radius-pill);
  background: var(--line-default);
  transition: background-color 160ms var(--ease-out);
}

.pw-strength-meter[data-score="1"] .pw-strength-bars span:nth-child(-n+1) {
  background: var(--status-danger);
}
.pw-strength-meter[data-score="2"] .pw-strength-bars span:nth-child(-n+2) {
  background: var(--status-warning);
}
.pw-strength-meter[data-score="3"] .pw-strength-bars span:nth-child(-n+3) {
  background: var(--fill-accent);
}
.pw-strength-meter[data-score="4"] .pw-strength-bars span:nth-child(-n+4) {
  background: var(--status-success);
}

/* ==========================================================================
   Forced Colors (Alto Contraste) & Reduced Motion
   ========================================================================== */

@media (forced-colors: active) {
  .card,
  .quiz-card,
  .btn,
  .choice-tile,
  .filter-chip,
  .avatar-pick-tile,
  .role-pick-card,
  dialog {
    border: 1px solid CanvasText;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .spotlight-layer {
    transition: none !important;
  }

  .btn,
  .nav-pill,
  .icon-btn,
  .quiz-card,
  .stat-tile-interactive,
  .feature-bento-card,
  .filter-chip,
  .choice-tile,
  .histogram-bar,
  dialog,
  [popover] {
    transform: none !important;
    transition-duration: 90ms !important;
  }

  .toast-item {
    animation: none;
  }

  .loading-spinner {
    --_used-spinner-duration: 6s;
  }

  .loader-ambient-glow,
  .loader-emblem-halo,
  .loader-gem,
  .loader-core-halo {
    animation: none !important;
  }

  .yachay-loader,
  .yachay-loader:where([hidden], [data-closing]) {
    transition-duration: 80ms !important;
  }

  .yachay-loader:where([hidden], [data-closing]) .loader-stage-center {
    transform: none !important;
  }

  .reticle-laser {
    animation: none !important;
  }
}

/* ==========================================================================
   V5: Experiencia Dual PIN + Código QR (Anfitrión, Inicio, Jugador y Escáner)
   ========================================================================== */

.pin-qr-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 1.35rem;
}

@media (max-width: 62rem) {
  .pin-qr-hero-grid {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .host-lobby-cta-col {
    grid-column: 1 / -1;
  }
}

@media (max-width: 40rem) {
  .pin-qr-hero-grid {
    grid-template-columns: minmax(0, 1fr);
    text-align: center;
  }

  .host-qr-card {
    justify-self: center;
  }
}

.pin-hero-copy {
  min-width: 0;
}

.host-qr-card {
  min-width: 0;
}

.host-qr-preview-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 0.85rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--line-strong);
  background: var(--surface-elevated, var(--surface-default));
  color: var(--content-primary);
  font-family: inherit;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 160ms var(--ease-out), border-color 160ms var(--ease-out), box-shadow 160ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .host-qr-preview-btn:hover {
    transform: translateY(-2px);
    border-color: var(--fill-accent);
    box-shadow: var(--shadow-md);
  }
}

.host-qr-preview-btn:active {
  transform: scale(0.98);
}

.host-qr-svg-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem;
  border-radius: 0.65rem;
  background: #FFFFFF;
  border: 1px solid rgb(20 20 19 / 0.1);
}

.host-qr-svg-wrap svg,
.host-qr-svg-wrap .yachay-qr-svg {
  display: block;
  width: 8.25rem;
  height: 8.25rem;
  max-width: 100%;
  height: auto;
}

.host-qr-caption {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
  line-height: 1.25;
}

.host-qr-caption strong {
  font-size: 0.8125rem;
  font-weight: 700;
}

.host-qr-caption span {
  font-size: 0.75rem;
  color: var(--fill-accent);
  font-weight: 600;
}

.host-lobby-cta-col {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.host-lobby-subactions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: flex-end;
}

@media (max-width: 62rem) {
  .host-lobby-subactions {
    justify-content: center;
  }
}

/* Modal de proyección QR en aula */
.dialog-qr-zoom {
  width: min(100% - 1.5rem, 32rem);
}

.qr-zoom-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  padding: 1.15rem 1rem;
  margin-block: 0.75rem 1rem;
  border-radius: var(--radius-card);
  background: var(--surface-sunken);
  border: 1px solid var(--line-default);
}

.qr-zoom-svg-frame {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem;
  border-radius: 1rem;
  background: #FFFFFF;
  box-shadow: var(--shadow-md);
  max-width: 100%;
}

.qr-zoom-svg-frame svg {
  display: block;
  width: min(20rem, 72vw);
  height: auto;
}

.qr-zoom-pin-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-pill);
  background: var(--surface-default);
  border: 1px solid var(--line-strong);
  font-size: 1rem;
}

.qr-zoom-pin-pill strong {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  letter-spacing: 0.08em;
  color: var(--fill-accent);
}

/* Inicio: Banner de sala activa con mini QR + acciones duales */
.active-room-qr-banner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: stretch;
  gap: 0.55rem;
  margin-block-end: 0.9rem;
}

.active-room-qr-banner .active-room-banner {
  margin-block-end: 0;
  min-width: 0;
}

.active-room-mini-qr {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem;
  border-radius: var(--radius-control);
  background: #FFFFFF;
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-sm);
  transition: transform 150ms var(--ease-out), border-color 150ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .active-room-mini-qr:hover {
    transform: scale(1.04);
    border-color: var(--fill-accent);
  }
}

.active-room-mini-qr svg {
  display: block;
  width: 3.6rem;
  height: 3.6rem;
}

@media (max-width: 26rem) {
  .active-room-qr-banner {
    grid-template-columns: minmax(0, 1fr);
  }

  .active-room-mini-qr {
    justify-self: center;
  }
}

.join-dual-actions {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 0.6rem;
}

@media (max-width: 28rem) {
  .join-dual-actions {
    grid-template-columns: minmax(0, 1fr);
  }
}

.qr-trigger-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

/* Modal Escáner e Importador QR */
.dialog-qr-scanner {
  width: min(100% - 1.5rem, 31rem);
}

.qr-privacy-notice {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.75rem 0.9rem;
  margin-block: 0.75rem 0.9rem;
  border-radius: var(--radius-control);
  background: var(--surface-sunken);
  border: 1px solid var(--line-default);
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--content-secondary);
}

.qr-privacy-icon {
  font-size: 1rem;
  line-height: 1.2;
  flex-shrink: 0;
}

.qr-camera-stage {
  margin-block-end: 0.85rem;
}

.qr-video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: #0D0F14;
  border: 1px solid var(--line-strong);
}

.qr-video-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.qr-scan-reticle {
  position: absolute;
  inset: 14%;
  pointer-events: none;
}

.reticle-corner {
  position: absolute;
  width: 1.5rem;
  height: 1.5rem;
  border-color: #38BDF8;
  border-style: solid;
  border-width: 0;
}

.rc-tl { top: 0; left: 0; border-top-width: 3px; border-left-width: 3px; border-top-left-radius: 0.5rem; }
.rc-tr { top: 0; right: 0; border-top-width: 3px; border-right-width: 3px; border-top-right-radius: 0.5rem; }
.rc-bl { bottom: 0; left: 0; border-bottom-width: 3px; border-left-width: 3px; border-bottom-left-radius: 0.5rem; }
.rc-br { bottom: 0; right: 0; border-bottom-width: 3px; border-right-width: 3px; border-bottom-right-radius: 0.5rem; }

.reticle-laser {
  position: absolute;
  inset-inline: 6%;
  top: 12%;
  height: 2px;
  background: linear-gradient(90deg, transparent, #38BDF8, transparent);
  box-shadow: 0 0 10px rgb(56 189 248 / 0.85);
  animation: qrLaserSweep 2.1s ease-in-out infinite alternate;
}

@keyframes qrLaserSweep {
  from { transform: translateY(0); }
  to   { transform: translateY(8.5rem); }
}

.qr-scanner-status {
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--surface-sunken);
  border: 1px solid var(--line-default);
  margin-block-end: 0.85rem;
  text-align: center;
}

.qr-scanner-status.is-error {
  color: var(--status-danger);
  border-color: color-mix(in oklab, var(--status-danger) 42%, var(--line-default));
}

.qr-scanner-actions-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
  margin-block-end: 0.95rem;
}

@media (max-width: 28rem) {
  .qr-scanner-actions-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.qr-paste-box {
  padding-block-start: 0.85rem;
  border-block-start: 1px solid var(--line-default);
  display: grid;
  gap: 0.45rem;
}

.qr-paste-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.5rem;
}

@media (max-width: 26rem) {
  .qr-paste-row {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ==========================================================================
   V6: Experiencia móvil tipo aplicación (barra de pestañas inferior, hojas modales,
   áreas seguras, scroll táctil) + dirección del QR del anfitrión
   ========================================================================== */

.app-tabbar {
  display: none;
}

.host-qr-address {
  margin: 0.55rem 0 0;
  max-width: 13.5rem;
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--content-secondary);
  text-align: center;
  overflow-wrap: anywhere;
}

.host-qr-address code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--content-primary);
}

.host-qr-address.is-local-only {
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-control);
  background: var(--status-info-bg);
  color: var(--status-info);
  border: 1px solid currentColor;
}

.host-qr-address.is-local-only code {
  color: inherit;
}

.host-qr-svg-wrap svg,
.host-qr-svg-wrap .yachay-qr-svg {
  width: min(11.75rem, 100%);
  height: auto;
  aspect-ratio: 1;
}

@media (max-width: 48rem) {
  html {
    -webkit-text-size-adjust: 100%;
    scroll-padding-block-end: 6rem;
  }

  body {
    -webkit-tap-highlight-color: transparent;
    overscroll-behavior-y: none;
    touch-action: manipulation;
  }

  body:has(.app-tabbar) {
    padding-block-end: calc(4.5rem + env(safe-area-inset-bottom));
  }

  /* Cabecera compacta tipo app */
  .site-nav,
  .site-footer,
  .user-chip-name,
  .header-actions .btn-secondary,
  .brand-byline {
    display: none !important;
  }

  .site-header {
    padding-block-start: env(safe-area-inset-top);
  }

  .header-inner {
    min-height: 3.5rem;
    flex-wrap: nowrap;
    padding-block: 0.3rem;
    gap: 0.5rem;
  }

  .header-actions {
    margin-inline-start: auto;
    display: flex;
    align-items: center;
    gap: 0.4rem;
  }

  /* Barra de pestañas inferior */
  .app-tabbar {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    align-items: end;
    position: fixed;
    inset-inline: 0;
    inset-block-end: 0;
    z-index: 60;
    padding: 0.3rem 0.4rem calc(0.3rem + env(safe-area-inset-bottom));
    background: color-mix(in oklab, var(--surface-default) 90%, transparent);
    backdrop-filter: blur(20px) saturate(1.6);
    -webkit-backdrop-filter: blur(20px) saturate(1.6);
    border-block-start: 1px solid var(--line-default);
    box-shadow: 0 -6px 24px rgb(0 0 0 / 0.06);
  }

  .app-tab {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.18rem;
    min-height: 3.35rem;
    padding: 0.3rem 0.1rem;
    border-radius: 1rem;
    color: var(--content-muted);
    text-decoration: none;
    font-size: 0.6875rem;
    font-weight: 650;
    letter-spacing: 0.005em;
    -webkit-user-select: none;
    user-select: none;
    transition: transform 140ms var(--ease-out), color 140ms var(--ease-out), background-color 140ms var(--ease-out);
  }

  .app-tab svg {
    width: 1.5rem;
    height: 1.5rem;
  }

  .app-tab:active {
    transform: scale(0.93);
  }

  .app-tab.is-active {
    color: var(--content-accent);
    background: var(--fill-accent-subtle, color-mix(in oklab, var(--fill-accent) 10%, transparent));
  }

  .app-tab-join {
    background: transparent !important;
    color: var(--content-primary);
  }

  .app-tab-join .app-tab-fab {
    display: grid;
    place-items: center;
    width: 3.5rem;
    height: 3.5rem;
    margin-block-start: -1.5rem;
    border-radius: 1.25rem;
    background: var(--fill-accent);
    color: #FFFFFF;
    border: 3px solid var(--surface-default);
    box-shadow: 0 8px 20px color-mix(in oklab, var(--fill-accent) 45%, transparent);
    transition: transform 160ms var(--ease-out);
  }

  .app-tab-join .app-tab-fab svg {
    width: 1.65rem;
    height: 1.65rem;
  }

  .app-tab-join:active .app-tab-fab {
    transform: scale(0.92);
  }

  .app-tab-join.is-active {
    color: var(--content-accent);
  }

  /* Durante la partida el mando ocupa toda la pantalla */
  body:has(#play-controller-view:not([hidden])) .app-tabbar {
    display: none;
  }

  body:has(#play-controller-view:not([hidden])) {
    padding-block-end: 0;
  }

  /* Notificaciones sobre la barra inferior */
  .toast-region {
    inset-inline: 1rem;
    inset-block-end: calc(5rem + env(safe-area-inset-bottom));
  }

  .toast-item {
    justify-content: center;
  }

  /* Hojas modales inferiores (bottom sheets) */
  dialog {
    transform: translateY(100%);
    opacity: 1;
  }

  dialog:modal {
    width: 100%;
    max-width: 100%;
    max-height: min(92dvh, calc(100dvh - env(safe-area-inset-top) - 0.5rem));
    margin: auto 0 0;
    border-radius: 1.5rem 1.5rem 0 0;
    border-block-end: 0;
    padding-block-end: env(safe-area-inset-bottom);
    overflow-y: auto;
  }

  dialog[open]:not([data-closing]) {
    transform: translateY(0);
  }

  @starting-style {
    dialog[open]:not([data-closing]) {
      transform: translateY(100%);
    }
  }

  dialog:modal .dialog-body::before {
    content: "";
    display: block;
    width: 2.5rem;
    height: 0.3rem;
    margin: -0.6rem auto 0.9rem;
    border-radius: var(--radius-pill);
    background: var(--line-strong);
  }

  .dialog-actions {
    flex-direction: column-reverse;
  }

  .dialog-actions > .btn,
  .dialog-actions > a.btn,
  .dialog-actions > form {
    width: 100%;
  }

  .dialog-actions > form .btn {
    width: 100%;
  }

  /* Tamaños táctiles y prevención de zoom en iOS */
  input,
  select,
  textarea {
    font-size: max(1rem, 16px);
  }

  .btn {
    min-height: 3rem;
  }

  .btn-sm {
    min-height: 2.75rem;
  }

  .page-title {
    font-size: clamp(1.5rem, 6.6vw, 2rem);
  }

  .section-header {
    align-items: stretch;
  }

  .section-header > div:last-child:not(:first-child) {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .public-hero-banner .public-hero-content {
    flex-direction: column;
    align-items: stretch;
  }

  .kpi-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .quiz-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  /* Filtros en carrusel horizontal con snap */
  .chip-filter-row {
    flex-wrap: nowrap;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
    margin-inline: -1rem;
    padding-inline: 1rem;
    padding-block-end: 0.25rem;
  }

  .chip-filter-row::-webkit-scrollbar {
    display: none;
  }

  .filter-chip {
    flex: 0 0 auto;
    scroll-snap-align: start;
  }

  .catalog-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .catalog-meta-right {
    justify-content: space-between;
  }

  .host-qr-address {
    max-width: none;
  }
}

@media (max-width: 48rem) and (display-mode: standalone) {
  .site-header {
    background: var(--surface-default);
  }
}

@media (prefers-reduced-motion: reduce) {
  .app-tab,
  .app-tab-join .app-tab-fab {
    transition: none;
  }
}