/* ═══════════════════════════════════════════════════════════════════════════
   MIKU GAME — Estilos base (Mobile-first, estética Vocaloid)
   ═══════════════════════════════════════════════════════════════════════════ */

/* ───────────────────────────────────────────────────────────────────────────
   VARIABLES CSS (Paleta Vocaloid + Tokens de diseño)
   ─────────────────────────────────────────────────────────────────────────── */
:root {
  /* Colores principales (Vocaloid palette) */
  --color-bg-deep:        #0d1b2a;
  --color-bg-mid:         #1b263b;
  --color-bg-surface:     #243b55;

  /* Acentos Vocaloid */
  --color-cyan:           #39c5bb;   /* Miku teal */
  --color-cyan-light:     #7fefef;
  --color-cyan-glow:      rgba(57, 197, 187, 0.5);

  --color-pink:           #ff6b9d;   /* Luka / Rin pink */
  --color-pink-light:     #ffb3c6;
  --color-pink-glow:      rgba(255, 107, 157, 0.5);

  --color-purple:         #a855f7;   /* Acento secundario */
  --color-purple-glow:    rgba(168, 85, 247, 0.4);

  --color-gold:           #fbbf24;   /* Éxito / acierto */
  --color-red:            #f87171;   /* Error / fallo */

  /* Texto */
  --color-text:           #f1f5f9;
  --color-text-muted:     #94a3b8;
  --color-text-dim:       #64748b;

  /* Tipografía */
  --font-main:            'Outfit', system-ui, sans-serif;
  --font-weight-light:    300;
  --font-weight-normal:   400;
  --font-weight-semibold: 600;
  --font-weight-bold:     700;

  /* Espaciado */
  --space-xs:   0.25rem;
  --space-sm:   0.5rem;
  --space-md:   1rem;
  --space-lg:   1.5rem;
  --space-xl:   2rem;
  --space-2xl:  3rem;

  /* Bordes y radios */
  --radius-sm:  0.5rem;
  --radius-md:  0.75rem;
  --radius-lg:  1rem;
  --radius-xl:  1.5rem;
  --radius-full: 9999px;

  /* Sombras */
  --shadow-glow-cyan:   0 0 20px var(--color-cyan-glow), 0 0 40px var(--color-cyan-glow);
  --shadow-glow-pink:   0 0 20px var(--color-pink-glow), 0 0 40px var(--color-pink-glow);
  --shadow-glow-purple: 0 0 20px var(--color-purple-glow);
  --shadow-card:        0 4px 24px rgba(0, 0, 0, 0.3);

  /* Transiciones */
  --transition-fast:   150ms ease-out;
  --transition-normal: 250ms ease-out;
  --transition-slow:   400ms ease-out;

  /* Layout */
  --header-height:  3.25rem;
  --footer-height:  4rem;
  --safe-area-top:    env(safe-area-inset-top, 0px);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
}


/* ───────────────────────────────────────────────────────────────────────────
   RESET Y BASE
   ─────────────────────────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  font-weight: var(--font-weight-normal);
  color: var(--color-text);
  background: var(--color-bg-deep);
  min-height: 100dvh;
  overflow: hidden;
  /* Prevenir selección de texto en mobile */
  -webkit-user-select: none;
  user-select: none;
  /* Prevenir pull-to-refresh */
  overscroll-behavior: none;
  /* Touch más responsivo */
  -webkit-tap-highlight-color: transparent;
}

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  touch-action: manipulation;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}


/* ───────────────────────────────────────────────────────────────────────────
   FONDO ANIMADO
   ─────────────────────────────────────────────────────────────────────────── */
.bg-animation {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

/* Gradiente base animado */
.bg-gradient {
  position: absolute;
  inset: -50%;
  background: 
    radial-gradient(ellipse at 20% 20%, var(--color-cyan-glow) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, var(--color-pink-glow) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, var(--color-purple-glow) 0%, transparent 60%);
  animation: bgRotate 30s linear infinite;
  opacity: 0.4;
}

@keyframes bgRotate {
  0%   { transform: rotate(0deg) scale(1.2); }
  100% { transform: rotate(360deg) scale(1.2); }
}

/* Partículas flotantes */
.bg-particles {
  position: absolute;
  inset: 0;
}

.bg-particles span {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--color-cyan-light);
  border-radius: var(--radius-full);
  opacity: 0.6;
  animation: particleFloat 8s ease-in-out infinite;
}

.bg-particles span:nth-child(1) { left: 10%; animation-delay: 0s; }
.bg-particles span:nth-child(2) { left: 30%; animation-delay: 1.5s; }
.bg-particles span:nth-child(3) { left: 50%; animation-delay: 3s; }
.bg-particles span:nth-child(4) { left: 70%; animation-delay: 4.5s; }
.bg-particles span:nth-child(5) { left: 85%; animation-delay: 2s; }
.bg-particles span:nth-child(6) { left: 95%; animation-delay: 5.5s; }

@keyframes particleFloat {
  0%, 100% {
    transform: translateY(100vh) scale(0);
    opacity: 0;
  }
  10% {
    opacity: 0.6;
    transform: translateY(80vh) scale(1);
  }
  90% {
    opacity: 0.6;
    transform: translateY(10vh) scale(1);
  }
  100% {
    transform: translateY(-10vh) scale(0);
    opacity: 0;
  }
}

/* Ondas musicales de fondo */
.bg-waves {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 30%;
  overflow: hidden;
}

.wave {
  position: absolute;
  bottom: 0;
  left: -50%;
  width: 200%;
  height: 100%;
  background: linear-gradient(to top, var(--color-cyan-glow), transparent);
  border-radius: 100% 100% 0 0;
  animation: waveMove 12s ease-in-out infinite;
  opacity: 0.15;
}

.wave--2 {
  animation-delay: -4s;
  animation-duration: 15s;
  opacity: 0.1;
}

.wave--3 {
  animation-delay: -8s;
  animation-duration: 18s;
  opacity: 0.08;
}

@keyframes waveMove {
  0%, 100% { transform: translateX(0) scaleY(1); }
  50%      { transform: translateX(25%) scaleY(1.1); }
}


/* ───────────────────────────────────────────────────────────────────────────
   MENÚ PRINCIPAL
   ─────────────────────────────────────────────────────────────────────────── */
.menu-screen {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  padding-top: calc(var(--space-lg) + var(--safe-area-top));
  padding-bottom: calc(var(--space-lg) + var(--safe-area-bottom));
}

.menu-screen[hidden] {
  display: none;
}

.menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
  width: 100%;
  max-width: 320px;
  animation: menuFadeIn 0.6s ease-out;
}

@keyframes menuFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Logo / Título del menú */
.menu__logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  text-align: center;
}

.menu__title {
  font-size: 3.5rem;
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--color-cyan) 0%, var(--color-pink) 50%, var(--color-purple) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: none;
  filter: drop-shadow(0 0 20px var(--color-cyan-glow));
  animation: titleGlow 3s ease-in-out infinite alternate;
}

@keyframes titleGlow {
  0% { filter: drop-shadow(0 0 20px var(--color-cyan-glow)); }
  100% { filter: drop-shadow(0 0 30px var(--color-pink-glow)); }
}

.menu__subtitle {
  font-size: 1.1rem;
  font-weight: var(--font-weight-light);
  color: var(--color-text-muted);
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

/* Opciones del menú */
.menu__options {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  width: 100%;
}

.menu__btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-normal);
  overflow: hidden;
}

.menu__btn--primary {
  background: linear-gradient(135deg, var(--color-cyan) 0%, var(--color-purple) 100%);
  color: white;
  box-shadow: 0 4px 20px var(--color-cyan-glow);
}

.menu__btn--primary:hover,
.menu__btn--primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-cyan);
}

.menu__btn--primary:active {
  transform: translateY(0);
}

.menu__btn--secondary {
  background: var(--color-bg-surface);
  color: var(--color-text-muted);
  border-color: var(--color-bg-mid);
}

.menu__btn--secondary:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.menu__btn-icon {
  font-size: 1.4rem;
  width: 1.5rem;
  text-align: center;
}

.menu__btn-text {
  flex: 1;
  text-align: left;
}

.menu__btn-badge {
  position: absolute;
  top: 0;
  right: 0;
  padding: 0.2rem 0.5rem;
  background: var(--color-pink);
  color: white;
  font-size: 0.6rem;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  border-radius: 0 var(--radius-lg) 0 var(--radius-sm);
}

/* Footer del menú */
.menu__footer {
  margin-top: var(--space-lg);
}

.menu__version {
  font-size: 0.75rem;
  color: var(--color-text-dim);
  letter-spacing: 0.1em;
}


/* ───────────────────────────────────────────────────────────────────────────
   CONTROL DE VOLUMEN LATERAL
   ─────────────────────────────────────────────────────────────────────────── */
.volume-panel {
  position: fixed;
  top: 50%;
  right: 0;
  z-index: 600;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.volume-toggle {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-bg-mid);
  border-right: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  color: var(--color-text);
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.volume-toggle:hover {
  background: var(--color-bg-mid);
  color: var(--color-cyan);
}

.volume-toggle__icon[hidden] {
  display: none;
}

.volume-slider-container {
  position: absolute;
  right: 2.5rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-bg-mid);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  animation: slideIn 0.2s ease-out;
}

.volume-slider-container[hidden] {
  display: none;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-50%) translateX(10px);
  }
  to {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
  }
}

.volume-slider {
  width: 100px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--color-bg-mid);
  border-radius: var(--radius-full);
  cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  background: var(--color-cyan);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 10px var(--color-cyan-glow);
  transition: transform var(--transition-fast);
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.volume-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  background: var(--color-cyan);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 10px var(--color-cyan-glow);
}

.volume-value {
  min-width: 2.5rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: right;
}


/* ───────────────────────────────────────────────────────────────────────────
   CONTENEDOR PRINCIPAL DEL JUEGO
   ─────────────────────────────────────────────────────────────────────────── */
.game-container {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  max-height: 100dvh;
  overflow: hidden;
  padding-top: var(--safe-area-top);
  padding-bottom: var(--safe-area-bottom);
}

.game-container[hidden] {
  display: none;
}


/* ───────────────────────────────────────────────────────────────────────────
   HEADER: Marcador + Timer
   ─────────────────────────────────────────────────────────────────────────── */
.game-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: var(--space-sm) var(--space-md);
  background: linear-gradient(to bottom, var(--color-bg-deep) 60%, transparent);
  backdrop-filter: blur(8px);
}

/* Botón Home */
.header-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-bg-mid);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.header-btn:hover,
.header-btn:focus-visible {
  background: var(--color-bg-mid);
  color: var(--color-cyan);
  border-color: var(--color-cyan);
}

.header-btn--home {
  color: var(--color-pink);
  border-color: var(--color-bg-mid);
}

.header-btn--home:hover,
.header-btn--home:focus-visible {
  color: var(--color-cyan);
  border-color: var(--color-cyan);
}

/* Info de ronda */
.round-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
}

.round-label {
  font-size: 0.65rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.round-number {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-cyan);
}

.round-total {
  font-size: 0.875rem;
  font-weight: var(--font-weight-normal);
  color: var(--color-text-muted);
}

/* Marcador (aciertos / fallos) */
.scoreboard {
  display: flex;
  gap: var(--space-md);
}

.score {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg-surface);
  border-radius: var(--radius-full);
}

.score__icon {
  font-size: 0.875rem;
  line-height: 1;
}

.score--hits .score__icon  { color: var(--color-cyan); }
.score--misses .score__icon { color: var(--color-red); }

.score__value {
  font-size: 1rem;
  font-weight: var(--font-weight-bold);
  min-width: 1.25rem;
  text-align: center;
}

.score--hits .score__value  { color: var(--color-cyan); }
.score--misses .score__value { color: var(--color-red); }

/* Timer circular */
.timer {
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
}

.timer__ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.timer__ring-bg {
  fill: none;
  stroke: var(--color-bg-surface);
  stroke-width: 3;
}

.timer__ring-fill {
  fill: none;
  stroke: var(--color-cyan);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 100;
  stroke-dashoffset: 25; /* 0 = lleno, 100 = vacío */
  transition: stroke-dashoffset 1s linear, stroke 0.3s;
}

/* Cuando queda poco tiempo */
.timer--warning .timer__ring-fill {
  stroke: var(--color-gold);
}

.timer--danger .timer__ring-fill {
  stroke: var(--color-red);
  animation: timerPulse 0.5s ease-in-out infinite;
}

@keyframes timerPulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.5; }
}

.timer__value {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: var(--font-weight-bold);
}


/* ───────────────────────────────────────────────────────────────────────────
   ZONAS DE SELECCIÓN
   ─────────────────────────────────────────────────────────────────────────── */
.selection-zone {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-sm) var(--space-md);
  min-height: 0; /* Allow flex shrink */
}

.selection-zone--images {
  flex: 1.3;
}

.selection-zone--names {
  flex: 0.7;
  overflow-y: auto;
}


/* ───────────────────────────────────────────────────────────────────────────
   GRID DE IMÁGENES (2x2)
   ─────────────────────────────────────────────────────────────────────────── */
.selection-grid--images {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  max-width: 320px;
  margin: 0 auto;
  width: 100%;
}

/* Tarjeta de imagen */
.card--image {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-fast);
}

.card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  background: var(--color-bg-surface);
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  overflow: hidden;
  transition: 
    border-color var(--transition-normal),
    box-shadow var(--transition-normal);
}

.card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card__glow {
  position: absolute;
  inset: 0;
  opacity: 0;
  background: radial-gradient(circle at center, var(--color-cyan-glow), transparent 70%);
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.card__indicator {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  width: 1.5rem;
  height: 1.5rem;
  background: var(--color-bg-mid);
  border: 2px solid var(--color-text-dim);
  border-radius: var(--radius-full);
  opacity: 0;
  transform: scale(0.5);
  transition: 
    opacity var(--transition-fast),
    transform var(--transition-fast),
    background var(--transition-fast),
    border-color var(--transition-fast);
}

/* Estados de la tarjeta */

/* Hover / Focus */
.card--image:focus-visible .card__inner {
  border-color: var(--color-cyan);
  outline: none;
}

/* Active (tocando) */
.card--image:active {
  transform: scale(0.96);
}

.card--image:active .card__img {
  transform: scale(1.05);
}

/* Seleccionado */
.card--image.is-selected .card__inner {
  border-color: var(--color-cyan);
  box-shadow: var(--shadow-glow-cyan);
}

.card--image.is-selected .card__glow {
  opacity: 0.5;
}

.card--image.is-selected .card__indicator {
  opacity: 1;
  transform: scale(1);
  background: var(--color-cyan);
  border-color: var(--color-cyan);
}

.card--image.is-selected .card__indicator::after {
  content: '✓';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--color-bg-deep);
  font-weight: var(--font-weight-bold);
}

/* Bloqueado (durante resultado o transición) */
.card--image.is-locked {
  pointer-events: none;
  opacity: 0.5;
}

/* Resultado correcto */
.card--image.is-correct .card__inner {
  border-color: var(--color-cyan);
  box-shadow: var(--shadow-glow-cyan);
  animation: correctPulse 0.6s ease-out;
}

/* Resultado incorrecto */
.card--image.is-incorrect .card__inner {
  border-color: var(--color-red);
  box-shadow: 0 0 20px rgba(248, 113, 113, 0.5);
}

@keyframes correctPulse {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.05); }
  100% { transform: scale(1); }
}


/* ───────────────────────────────────────────────────────────────────────────
   SEPARADOR / DIVIDER
   ─────────────────────────────────────────────────────────────────────────── */
.divider {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xs) var(--space-lg);
  flex-shrink: 0;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--color-text-dim),
    transparent
  );
}

.divider__pulse {
  width: 8px;
  height: 8px;
  margin: 0 var(--space-md);
  background: var(--color-cyan);
  border-radius: var(--radius-full);
  animation: dividerPulse 2s ease-in-out infinite;
}

@keyframes dividerPulse {
  0%, 100% { 
    transform: scale(1);
    box-shadow: 0 0 0 0 var(--color-cyan-glow);
  }
  50% {
    transform: scale(1.2);
    box-shadow: 0 0 10px 4px var(--color-cyan-glow);
  }
}


/* ───────────────────────────────────────────────────────────────────────────
   LISTA DE NOMBRES (Chips)
   ─────────────────────────────────────────────────────────────────────────── */
.selection-list--names {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  max-width: 400px;
  margin: 0 auto;
  width: 100%;
}

/* Chip de nombre */
.chip--name {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-surface);
  border: 2px solid transparent;
  border-radius: var(--radius-full);
  overflow: hidden;
  transition: 
    transform var(--transition-fast),
    border-color var(--transition-normal),
    box-shadow var(--transition-normal),
    background var(--transition-normal);
}

.chip__text {
  position: relative;
  z-index: 1;
  font-size: 0.9rem;
  font-weight: var(--font-weight-semibold);
  transition: color var(--transition-normal);
}

.chip__glow {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-cyan-glow), var(--color-pink-glow));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

/* Estados del chip */

/* Hover / Focus */
.chip--name:focus-visible {
  border-color: var(--color-pink);
  outline: none;
}

/* Active (tocando) */
.chip--name:active {
  transform: scale(0.97);
}

/* Seleccionado */
.chip--name.is-selected {
  border-color: var(--color-cyan);
  box-shadow: var(--shadow-glow-cyan);
}

.chip--name.is-selected .chip__glow {
  opacity: 0.3;
  background: linear-gradient(135deg, var(--color-cyan-glow), var(--color-cyan-glow));
}

.chip--name.is-selected .chip__text {
  color: var(--color-cyan-light);
}

/* Bloqueado */
.chip--name.is-locked {
  pointer-events: none;
  opacity: 0.5;
}

/* Resultado correcto */
.chip--name.is-correct {
  border-color: var(--color-cyan);
  box-shadow: var(--shadow-glow-cyan);
  animation: correctPulse 0.6s ease-out;
}

/* Resultado incorrecto */
.chip--name.is-incorrect {
  border-color: var(--color-red);
  box-shadow: 0 0 20px rgba(248, 113, 113, 0.5);
}


/* ───────────────────────────────────────────────────────────────────────────
   FOOTER: Botón de confirmación
   ─────────────────────────────────────────────────────────────────────────── */
.game-footer {
  position: sticky;
  bottom: 0;
  z-index: 100;
  padding: var(--space-sm) var(--space-md);
  padding-bottom: calc(var(--space-sm) + var(--safe-area-bottom));
  background: linear-gradient(to top, var(--color-bg-deep) 60%, transparent);
  flex-shrink: 0;
}

.btn--confirm {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
  padding: var(--space-sm) var(--space-lg);
  background: linear-gradient(135deg, var(--color-cyan), var(--color-purple));
  border-radius: var(--radius-full);
  overflow: hidden;
  transition: 
    transform var(--transition-fast),
    opacity var(--transition-normal),
    box-shadow var(--transition-normal);
}

.btn__text {
  font-size: 1rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.02em;
}

.btn__icon {
  font-size: 0.875rem;
  transition: transform var(--transition-normal);
}

.btn__ripple {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255,255,255,0.3), transparent 70%);
  opacity: 0;
  transform: scale(0);
  transition: 
    opacity var(--transition-fast),
    transform var(--transition-normal);
}

/* Estados del botón */

/* Habilitado */
.btn--confirm:not(:disabled) {
  box-shadow: 
    0 4px 20px var(--color-cyan-glow),
    0 0 40px var(--color-purple-glow);
}

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

.btn--confirm:not(:disabled):active .btn__ripple {
  opacity: 1;
  transform: scale(1.5);
}

.btn--confirm:not(:disabled):active .btn__icon {
  transform: translateX(4px);
}

/* Deshabilitado */
.btn--confirm:disabled {
  background: var(--color-bg-surface);
  color: var(--color-text-dim);
  cursor: not-allowed;
  opacity: 0.6;
}


/* ───────────────────────────────────────────────────────────────────────────
   OVERLAYS
   ─────────────────────────────────────────────────────────────────────────── */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(13, 27, 42, 0.9);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: 
    opacity var(--transition-slow),
    visibility var(--transition-slow);
}

.overlay:not([hidden]) {
  opacity: 1;
  visibility: visible;
}

/* Tarjeta de resultado */
.result-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-2xl);
  background: var(--color-bg-surface);
  border-radius: var(--radius-xl);
  text-align: center;
  transform: scale(0.8);
  transition: transform var(--transition-slow);
}

.overlay:not([hidden]) .result-card {
  transform: scale(1);
}

.result-card__icon {
  font-size: 4rem;
  line-height: 1;
}

.result-card--correct .result-card__icon {
  color: var(--color-cyan);
  text-shadow: var(--shadow-glow-cyan);
}

.result-card--incorrect .result-card__icon {
  color: var(--color-red);
}

.result-card__title {
  font-size: 1.75rem;
  font-weight: var(--font-weight-bold);
}

.result-card--correct .result-card__title {
  color: var(--color-cyan);
}

.result-card--incorrect .result-card__title {
  color: var(--color-red);
}

.result-card__detail {
  font-size: 1rem;
  color: var(--color-text-muted);
}

/* Overlay de carga */
.overlay--loading {
  background: rgba(13, 27, 42, 0.85);
}

/* Overlay final de partida */
.overlay--end {
  display: grid;
  place-items: center;
  backdrop-filter: blur(8px) saturate(120%);
  background: rgba(13, 27, 42, 0.8);
  padding: var(--space-lg);
}

.end-card {
  width: min(420px, 92vw);
  max-height: 80vh;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-bg-mid);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-lg);
}

.end-card__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-md);
}

.end-card__title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
}

.end-card__stats {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.end-card__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  overflow: auto;
  max-height: 50vh;
}

.end-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-sm);
  align-items: center;
  padding: var(--space-sm);
  border: 1px solid var(--color-bg-mid);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
}

.end-item__thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  border: 1px solid var(--color-bg-mid);
}

.end-item__title {
  font-weight: var(--font-weight-semibold);
}

.end-item__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.end-item__artist {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.end-item__status {
  font-size: 0.9rem;
  font-weight: var(--font-weight-bold);
}

.end-item__status--hit { color: var(--color-cyan); }
.end-item__status--miss { color: var(--color-red); }

.end-card__actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-sm);
}

.btn--share {
  background: linear-gradient(135deg, var(--color-cyan), var(--color-purple));
  color: white;
  border: none;
  box-shadow: var(--shadow-glow-cyan);
}

.btn--share:hover,
.btn--share:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 6px 22px var(--color-cyan-glow);
}

/* Overlay de confirmación de salida */
.overlay--exit {
  display: grid;
  place-items: center;
  backdrop-filter: blur(8px) saturate(120%);
  background: rgba(13, 27, 42, 0.8);
  padding: var(--space-lg);
}

.exit-card {
  width: min(360px, 92vw);
  padding: var(--space-lg);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-bg-mid);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  text-align: center;
}

.exit-card__icon {
  font-size: 2rem;
  color: var(--color-pink);
}

.exit-card__title {
  font-size: 1.2rem;
  font-weight: var(--font-weight-bold);
}

.exit-card__detail {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.exit-card__actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-sm);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-bg-mid);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
}

.btn--danger {
  background: linear-gradient(135deg, #f87171, #fb7185);
  color: white;
  border: none;
  box-shadow: 0 4px 18px rgba(248, 113, 113, 0.35);
}

.btn--danger:hover,
.btn--danger:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 6px 22px rgba(248, 113, 113, 0.45);
}

.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-xl);
  background: var(--color-bg-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
}

.loading__icon {
  display: none;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

.overlay--loading.is-error .loading {
  border: 1px solid var(--color-red);
  box-shadow: 0 0 20px rgba(248, 113, 113, 0.4);
}

.overlay--loading.is-error .loading__text {
  color: var(--color-red);
  font-weight: var(--font-weight-semibold);
}

.overlay--loading.is-error .loading__spinner {
  display: none;
}

.overlay--loading.is-error .loading__icon {
  display: block;
}

.loading__spinner {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 4px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--color-cyan);
  animation: spin 1s linear infinite;
}

.loading__text {
  font-size: 1rem;
  color: var(--color-text);
  text-align: center;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Intermisión */
.intermission {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  text-align: center;
}

.intermission__round {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

.intermission__prompt {
  font-size: 1.5rem;
  font-weight: var(--font-weight-light);
  color: var(--color-pink);
}

.intermission__countdown {
  font-size: 5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-cyan);
  text-shadow: var(--shadow-glow-cyan);
  animation: countdownPop 1s ease-out infinite;
}

@keyframes countdownPop {
  0%   { transform: scale(1.3); opacity: 0; }
  20%  { transform: scale(1); opacity: 1; }
  80%  { transform: scale(1); opacity: 1; }
  100% { transform: scale(0.8); opacity: 0; }
}


/* ───────────────────────────────────────────────────────────────────────────
   UTILIDADES Y ANIMACIONES EXTRA
   ─────────────────────────────────────────────────────────────────────────── */

/* Animación de entrada escalonada */
@keyframes staggerIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.selection-grid--images .card--image {
  animation: staggerIn 0.4s ease-out backwards;
}

.selection-grid--images .card--image:nth-child(1) { animation-delay: 0.05s; }
.selection-grid--images .card--image:nth-child(2) { animation-delay: 0.1s; }
.selection-grid--images .card--image:nth-child(3) { animation-delay: 0.15s; }
.selection-grid--images .card--image:nth-child(4) { animation-delay: 0.2s; }

.selection-list--names .chip--name {
  animation: staggerIn 0.4s ease-out backwards;
}

.selection-list--names .chip--name:nth-child(1) { animation-delay: 0.25s; }
.selection-list--names .chip--name:nth-child(2) { animation-delay: 0.3s; }
.selection-list--names .chip--name:nth-child(3) { animation-delay: 0.35s; }
.selection-list--names .chip--name:nth-child(4) { animation-delay: 0.4s; }

/* Clase para deshabilitar animaciones (accesibilidad) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}


/* ───────────────────────────────────────────────────────────────────────────
   RESPONSIVE (Tablets y pantallas más grandes)
   ─────────────────────────────────────────────────────────────────────────── */
@media (min-width: 600px) {
  .selection-grid--images {
    max-width: 500px;
    gap: var(--space-lg);
  }

  .selection-list--names {
    max-width: 500px;
  }

  .chip--name {
    padding: var(--space-lg) var(--space-xl);
  }

  .chip__text {
    font-size: 1.125rem;
  }
}

@media (min-width: 900px) {
  /* En pantallas grandes, centrar todo verticalmente */
  .game-container {
    max-width: 600px;
    margin: 0 auto;
  }
}