:root {
  --bg-main: #060911;
  --bg-card: #0e1526;
  --bg-hover: #1b253b;
  --border-color: #243049;
  --border-focus: #3b82f6;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --accent: #0284c7;
  --success: #10b981;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-card: 0 16px 40px rgba(0, 0, 0, 0.55);
  --transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  min-height: 100dvh; /* dynamic viewport para móviles con teclado */
  display: flex;
  flex-direction: column;
  /* Respetar la barra de estado / home indicator en iPhones */
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 40px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-icon {
  font-size: 2rem;
}

.header-brand h1 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.3px;
}

.header-brand small {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--accent);
  margin-left: 8px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  background: rgba(16, 185, 129, 0.12);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: 9999px;
  font-size: 0.84rem;
  font-weight: 600;
}

/* Layout Principal con Escenario Ampliado */
.app-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(0, 360px);
  gap: 36px;
  max-width: 1320px;
  margin: 32px auto;
  padding: 0 28px;
  width: 100%;
  justify-content: center;
  align-items: start;
}

/* Tarjeta del Escenario de Video */
.stage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.stage-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-bottom: 2px;
}

.badge {
  font-size: 0.85rem;
  font-weight: 600;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
  padding: 7px 15px;
  border-radius: 9999px;
  border: 1px solid rgba(56, 189, 248, 0.3);
  letter-spacing: 0.2px;
}

.caption {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fbbf24;
  background: rgba(251, 191, 36, 0.08);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(251, 191, 36, 0.25);
  max-width: 55%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: right;
}

/* Contenedor del Video de Gran Formato */
.media-container {
  width: 100%;
  height: 490px;
  background: #020617;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  border: 1px solid var(--border-color);
  box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.85), 0 12px 28px rgba(0, 0, 0, 0.5);
}

#human-video-player {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Fila de Botones Superiores con Separación Ampliada */
.stage-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 22px;
  font-size: 0.96rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.2px;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.5);
}

.btn-secondary {
  background: var(--bg-hover);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: #25334d;
  border-color: #3b4d70;
  transform: translateY(-2px);
}

/* Caja de Entrada de Texto con Botón Integrado */
.text-input-box {
  width: 100%;
  margin-top: 6px;
}

.text-form {
  display: flex;
  align-items: stretch;
  background: #040711;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.4);
}

.text-form:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
}

.text-form input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 14px 18px;
  color: var(--text-main);
  font-size: 1rem;
  outline: none;
}

.text-form input::placeholder {
  color: var(--text-muted);
}

.text-form .btn-accent {
  background: var(--primary);
  color: #ffffff;
  padding: 0 26px;
  border-radius: 0;
  font-weight: 700;
  font-size: 0.95rem;
}

.text-form .btn-accent:hover {
  background: var(--primary-hover);
}

/* Sección de Micrófono con Separación Adicional */
.voice-controls {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 4px;
}

.btn-voice {
  width: 100%;
  background: rgba(37, 99, 235, 0.12);
  color: var(--text-main);
  border: 1px solid rgba(37, 99, 235, 0.35);
  padding: 13px;
}

.btn-voice:hover {
  background: rgba(37, 99, 235, 0.22);
  border-color: var(--primary);
  transform: translateY(-1px);
}

.transcript-text {
  font-size: 0.86rem;
  color: var(--text-muted);
  text-align: center;
  min-height: 20px;
}

/* Tarjeta del Diccionario */
.dictionary-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  height: 750px;
  box-shadow: var(--shadow-card);
}

.dictionary-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  background: #040711;
  padding: 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.tab-btn {
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 9px;
  font-size: 0.84rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4);
}

.dictionary-list {
  list-style: none;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-right: 6px;
}

.dictionary-list::-webkit-scrollbar {
  width: 6px;
}

.dictionary-list::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 9999px;
}

.dictionary-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 13px 18px;
  background: #040711;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.dictionary-item:hover {
  background: var(--bg-hover);
  border-color: #3b4d70;
  transform: translateX(4px);
}

.dictionary-item.active {
  border-color: var(--primary);
  background: rgba(37, 99, 235, 0.18);
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.2);
}

.dictionary-item strong {
  font-size: 0.96rem;
  color: var(--text-main);
}

.dictionary-item .tag {
  font-size: 0.72rem;
  text-transform: uppercase;
  font-weight: 700;
  padding: 4px 9px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 5px;
  color: var(--text-muted);
}

/* ============================================================
   RESPONSIVE — Tablet / Mobile / 5" phones
   ============================================================ */

/* Tablets pequeños y móviles grandes (< 980px) */
@media (max-width: 980px) {
  .app-layout {
    grid-template-columns: 1fr;
    max-width: 720px;
  }
  .media-container {
    height: 400px;
  }
  .dictionary-card {
    height: auto;
    max-height: 520px;
  }
}

/* Móviles grandes (< 640px) */
@media (max-width: 640px) {
  .app-header {
    padding: 12px 16px;
    flex-wrap: wrap;
    gap: 10px;
  }
  .header-brand {
    gap: 10px;
  }
  .logo-icon {
    font-size: 1.7rem;
  }
  .header-brand h1 {
    font-size: 1.15rem;
    line-height: 1.15;
    display: flex;
    flex-direction: column;
  }
  .header-brand small {
    font-size: 0.72rem;
    margin-left: 0;
    margin-top: 2px;
    font-weight: 500;
  }
  .status-badge {
    padding: 5px 11px;
    font-size: 0.75rem;
  }

  .app-layout {
    padding: 0 14px;
    margin: 18px auto;
    gap: 18px;
  }

  .stage-card {
    padding: 18px;
    gap: 16px;
    border-radius: 16px;
  }
  .stage-header {
    flex-wrap: wrap;
    gap: 10px;
  }
  .badge {
    font-size: 0.76rem;
    padding: 6px 12px;
  }
  .caption {
    font-size: 0.9rem;
    padding: 5px 11px;
    max-width: 100%;
    text-align: left;
  }

  .media-container {
    height: 320px;
    border-radius: 12px;
  }

  .stage-controls {
    gap: 12px;
  }
  .btn {
    padding: 12px 16px;
    font-size: 0.92rem;
  }

  /* Input a 16px para evitar el zoom automático de iOS al enfocar */
  .text-form input {
    padding: 13px 15px;
    font-size: 16px;
  }
  .text-form .btn-accent {
    padding: 0 20px;
    font-size: 0.9rem;
  }

  .btn-voice {
    padding: 13px;
  }
  .transcript-text {
    font-size: 0.82rem;
    line-height: 1.4;
  }

  .dictionary-card {
    padding: 18px;
    border-radius: 16px;
    max-height: 440px;
  }
  .tab-btn {
    font-size: 0.8rem;
    padding: 9px 4px;
  }
  .dictionary-item {
    padding: 12px 14px;
  }
  .dictionary-item strong {
    font-size: 0.92rem;
  }
}

/* Pantallas 5" (iPhone SE, Galaxy A / M pequeños, ~360-400px) */
@media (max-width: 400px) {
  .app-header {
    padding: 10px 12px;
  }
  .header-brand {
    gap: 8px;
  }
  .logo-icon {
    font-size: 1.5rem;
  }
  .header-brand h1 {
    font-size: 1.02rem;
  }
  .header-brand small {
    font-size: 0.66rem;
  }
  .status-badge {
    padding: 4px 9px;
    font-size: 0.68rem;
  }
  .status-badge::before {
    /* Ocultar el punto para ganar espacio si estuviera visible */
    display: none;
  }

  .app-layout {
    padding: 0 10px;
    margin: 14px auto;
    gap: 14px;
  }

  .stage-card {
    padding: 14px;
    gap: 12px;
    border-radius: 14px;
  }
  .stage-header {
    gap: 8px;
  }
  .badge {
    font-size: 0.7rem;
    padding: 5px 10px;
  }
  .caption {
    font-size: 0.82rem;
    padding: 4px 9px;
  }

  .media-container {
    height: 260px;
    border-radius: 10px;
  }

  /* Botones apilados en pantallas muy angostas para que sean fáciles de tocar */
  .stage-controls {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .btn {
    padding: 12px 14px;
    font-size: 0.9rem;
    min-height: 46px; /* zona táctil accesible */
  }

  .text-form input {
    padding: 12px 13px;
  }
  .text-form .btn-accent {
    padding: 0 16px;
    font-size: 0.85rem;
  }

  .btn-voice {
    padding: 12px;
    min-height: 46px;
  }
  .transcript-text {
    font-size: 0.78rem;
  }

  .dictionary-card {
    padding: 14px;
    max-height: 380px;
    gap: 14px;
  }
  .dictionary-tabs {
    padding: 4px;
    gap: 4px;
  }
  .tab-btn {
    font-size: 0.74rem;
    padding: 8px 2px;
  }
  .dictionary-item {
    padding: 11px 13px;
  }
  .dictionary-item strong {
    font-size: 0.88rem;
  }
  .dictionary-item .tag {
    font-size: 0.66rem;
    padding: 3px 7px;
  }

  /* En 5" evitamos el efecto hover translateX que corta el borde */
  .dictionary-item:hover {
    transform: none;
  }
}

/* Landscape en móviles pequeños: reducimos altura del video */
@media (max-height: 480px) and (orientation: landscape) {
  .media-container {
    height: 220px;
  }
  .dictionary-card {
    max-height: 280px;
  }
}

/* ============================================================
   Estado "escuchando" del botón de micrófono
   ============================================================ */
.btn-voice.listening {
  background: rgba(239, 68, 68, 0.18);
  border-color: rgba(239, 68, 68, 0.55);
  color: #fecaca;
  animation: voicePulse 1.4s ease-in-out infinite;
}

.btn-voice.listening span:first-child {
  animation: micPulse 0.9s ease-in-out infinite alternate;
}

@keyframes voicePulse {
  0%   { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.55); }
  70%  { box-shadow: 0 0 0 14px rgba(239, 68, 68, 0); }
  100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

@keyframes micPulse {
  from { transform: scale(1);   opacity: 0.85; }
  to   { transform: scale(1.15); opacity: 1;   }
}

/* ============================================================
   PWA Install Prompt (Android + iOS)
   ============================================================ */

/* Botón flotante de instalación */
.pwa-install-btn {
  position: fixed;
  right: 20px;
  bottom: 22px;
  z-index: 9998;

  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px 12px 14px;

  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  border: none;
  border-radius: 9999px;
  font-family: inherit;
  font-size: 0.94rem;
  font-weight: 600;
  letter-spacing: 0.2px;
  cursor: pointer;

  box-shadow:
    0 10px 25px rgba(37, 99, 235, 0.45),
    0 2px 6px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);

  opacity: 0;
  transform: translateY(20px) scale(0.9);
  transition: opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1),
              background 0.22s ease,
              box-shadow 0.22s ease;
  pointer-events: none;
}

.pwa-install-btn.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
  animation: pwaPulse 2.4s ease-in-out 1s 3;
}

.pwa-install-btn:hover {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  box-shadow:
    0 14px 32px rgba(37, 99, 235, 0.55),
    0 2px 6px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
  transform: translateY(-2px) scale(1);
}

.pwa-install-btn:active {
  transform: translateY(0) scale(0.97);
}

.pwa-install-btn--ios {
  background: linear-gradient(135deg, #0284c7, #0369a1);
  box-shadow:
    0 10px 25px rgba(2, 132, 199, 0.45),
    0 2px 6px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.pwa-install-btn--ios:hover {
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
}

.pwa-install-btn__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  padding: 4px;
  flex-shrink: 0;
}

.pwa-install-btn__icon svg {
  width: 100%;
  height: 100%;
}

.pwa-install-btn__label {
  white-space: nowrap;
}

.pwa-install-btn__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  margin-left: 4px;
  padding-bottom: 2px;
  background: rgba(255, 255, 255, 0.16);
  border-radius: 50%;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s ease;
}

.pwa-install-btn__close:hover {
  background: rgba(255, 255, 255, 0.3);
}

@keyframes pwaPulse {
  0%, 100% { box-shadow: 0 10px 25px rgba(37, 99, 235, 0.45), 0 2px 6px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.2); }
  50%      { box-shadow: 0 10px 25px rgba(37, 99, 235, 0.45), 0 0 0 10px rgba(59, 130, 246, 0.0), 0 2px 6px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.2); }
}

/* En pantallas muy pequeñas, botón compacto */
@media (max-width: 400px) {
  .pwa-install-btn {
    right: 12px;
    bottom: calc(14px + env(safe-area-inset-bottom, 0px));
    padding: 10px 12px;
    font-size: 0.82rem;
    gap: 8px;
  }
  .pwa-install-btn__icon {
    width: 22px;
    height: 22px;
  }
  .pwa-install-btn__close {
    width: 20px;
    height: 20px;
    font-size: 0.9rem;
  }
}

/* ============================================================
   Modal de instrucciones iOS
   ============================================================ */

.pwa-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;

  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 16px;

  background: rgba(3, 6, 15, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);

  opacity: 0;
  transition: opacity 0.28s ease;
  pointer-events: none;
}

.pwa-modal-overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.pwa-modal {
  position: relative;
  width: 100%;
  max-width: 460px;
  padding: 28px 24px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 22px 22px 22px 22px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.7);

  transform: translateY(30px) scale(0.96);
  transition: transform 0.32s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.pwa-modal-overlay.is-visible .pwa-modal {
  transform: translateY(0) scale(1);
}

.pwa-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 34px;
  height: 34px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
  transition: var(--transition);
}

.pwa-modal-close:hover {
  background: rgba(255, 255, 255, 0.12);
}

.pwa-modal-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 14px;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

.pwa-modal-icon img {
  width: 100%;
  height: 100%;
  display: block;
}

.pwa-modal-title {
  text-align: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.pwa-modal-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.45;
  margin-bottom: 22px;
}

.pwa-modal-steps {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pwa-modal-steps li {
  display: flex;
  gap: 14px;
  padding: 14px;
  background: #040711;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.pwa-step-num {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 0 3px 8px rgba(37, 99, 235, 0.4);
}

.pwa-step-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: var(--text-main);
  font-size: 0.94rem;
  line-height: 1.4;
}

.pwa-step-body strong {
  font-weight: 700;
}

.pwa-step-hint {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.pwa-share-icon {
  width: 20px;
  height: 20px;
  color: #38bdf8;
  vertical-align: middle;
}

.pwa-modal-ok {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.pwa-modal-ok:hover {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.55);
}

/* Modal centrado en pantallas grandes */
@media (min-width: 640px) {
  .pwa-modal-overlay {
    align-items: center;
  }
}

/* Ocultamos el botón cuando la app corre en modo standalone
   (por si el navegador incorrectamente dispara el evento) */
@media (display-mode: standalone) {
  .pwa-install-btn,
  .pwa-modal-overlay {
    display: none !important;
  }
}