/* ════════════════════════════════════════════════════════════════
   LINGUA ITALIANO — Diseño "Italiano Elegante"
   Paleta: Verde profundo + Crema + Rojo sutil (NO bandera literal)
   Inspiración: Bodoni (Parma 1740), editorial italiano elegante
   ════════════════════════════════════════════════════════════════ */
:root {
  /* Verde italiano profundo (no bandera) */
  --green-900: #0D3B1F;
  --green-800: #134E26;
  --green-700: #1B5E20;   /* Primary */
  --green-600: #2E7D32;
  --green-500: #388E3C;
  --green-100: #C8E6C9;
  --green-50:  #E8F5E9;

  /* Rojo italiano sutil (acento, no dominante) */
  --red-700: #B71C1C;
  --red-600: #C62828;
  --red-500: #D32F2F;
  --red-100: #FFCDD2;

  /* Dorado/ámbar (calidez italiana) */
  --gold-600: #F57F17;
  --gold-500: #F9A825;
  --gold-400: #FBC02D;
  --gold-100: #FFF9C4;

  /* Neutros cálidos (crema italiana) */
  --cream:    #FAF7F2;   /* Fondo principal */
  --cream-2:  #F5F0E8;
  --paper:    #FFFFFF;
  --ink-900:  #1A1A1A;
  --ink-700:  #2D2D2D;
  --ink-500:  #666666;
  --ink-300:  #BDBDBD;
  --ink-100:  #E0E0E0;

  /* Tipografía editorial italiana */
  --font-serif: 'Playfair Display', 'Georgia', 'Times New Roman', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, Consolas, monospace;
  --font-ipa: 'Doulos SIL', 'Charis SIL', 'Gentium', serif;

  /* Radios y sombras */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  font-family: var(--font-sans);
  background: var(--cream);
  color: var(--ink-900);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

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

button:disabled { cursor: not-allowed; opacity: 0.45; }

a { color: var(--green-700); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ════════════════════════════════════════════════════════════════
   HEADER — Top bar con logo y stats
   ════════════════════════════════════════════════════════════════ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--ink-100);
}
.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: var(--r-md);
  background: linear-gradient(135deg, var(--green-700), var(--green-800));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 22px;
  box-shadow: var(--shadow-sm);
  border-bottom: 3px solid var(--green-900);
}
.brand-name {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--ink-900);
  font-size: 20px;
  letter-spacing: -0.3px;
}
.brand-sub {
  font-size: 11px;
  color: var(--ink-500);
  letter-spacing: 1px;
  text-transform: uppercase;
  font-weight: 600;
}
.stats {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  font-weight: 700;
}
.stat {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border-radius: var(--r-sm);
  background: var(--cream-2);
}
.stat-num { color: var(--ink-900); }
.stat-flame { color: var(--red-600); }
.stat-gem { color: var(--green-700); }
.stat-xp { color: var(--gold-600); }
.stat-heart { color: var(--red-500); cursor: pointer; }
.stat-heart:hover { background: var(--red-100); }

/* ════════════════════════════════════════════════════════════════
   NAVEGACIÓN — Tabs inferiores (móvil) / sidebar (desktop)
   ════════════════════════════════════════════════════════════════ */
.nav-tabs {
  display: flex;
  background: var(--paper);
  border-top: 1px solid var(--ink-100);
  position: sticky;
  bottom: 0;
  z-index: 20;
}
.nav-tab {
  flex: 1;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-500);
  transition: color 0.15s;
  border-top: 3px solid transparent;
}
.nav-tab.active {
  color: var(--green-700);
  border-top-color: var(--green-700);
  background: var(--green-50);
}
.nav-tab svg { width: 22px; height: 22px; }

@media (min-width: 768px) {
  .nav-tabs {
    flex-direction: column;
    border-top: none;
    border-right: 1px solid var(--ink-100);
    width: 200px;
    position: sticky;
    top: 64px;
    height: calc(100vh - 64px);
    height: calc(100dvh - 64px);
  }
  .nav-tab {
    flex: none;
    flex-direction: row;
    justify-content: flex-start;
    gap: 12px;
    padding: 14px 20px;
    font-size: 14px;
    border-top: none;
    border-left: 3px solid transparent;
  }
  .nav-tab.active {
    border-top: none;
    border-left-color: var(--green-700);
  }
  .nav-tab svg { width: 20px; height: 20px; }
}

.app-shell {
  flex: 1;
  display: flex;
  flex-direction: column;
}
@media (min-width: 768px) {
  .app-shell {
    flex-direction: row;
  }
  .main-content {
    flex: 1;
    overflow-y: auto;
  }
}

/* ════════════════════════════════════════════════════════════════
   PANTALLAS
   ════════════════════════════════════════════════════════════════ */
.screen {
  padding: 24px 16px;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  animation: fadeIn 0.25s ease-out;
}
@media (min-width: 768px) {
  .screen { padding: 32px 40px; }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.screen-title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 4px;
  letter-spacing: -0.5px;
}
.screen-subtitle {
  font-size: 16px;
  color: var(--ink-500);
  margin-bottom: 28px;
}

/* ════════════════════════════════════════════════════════════════
   PANTALLA DE ACTIVACIÓN
   ════════════════════════════════════════════════════════════════ */
.activate-wrap {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  background: linear-gradient(135deg, var(--cream) 0%, var(--green-50) 100%);
}
.activate-card {
  width: 100%;
  max-width: 440px;
  background: var(--paper);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--ink-100);
  padding: 40px 32px;
}
.activate-logo {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--green-700), var(--green-800));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 38px;
  box-shadow: var(--shadow-md);
  border-bottom: 4px solid var(--green-900);
}
.activate-title {
  text-align: center;
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 4px;
  letter-spacing: -0.5px;
}
.activate-sub {
  text-align: center;
  font-size: 14px;
  color: var(--ink-500);
  margin-bottom: 28px;
}
.activate-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--ink-100);
}
.activate-header-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  background: var(--green-50);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green-700);
}
.activate-header h2 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink-900);
}
.activate-header p {
  font-size: 13px;
  color: var(--ink-500);
}
.activate-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-700);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.activate-input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--ink-300);
  border-radius: var(--r-md);
  font-family: var(--font-mono);
  text-align: center;
  font-size: 18px;
  letter-spacing: 2px;
  text-transform: uppercase;
  transition: border-color 0.15s;
  background: var(--paper);
  color: var(--ink-900);
}
.activate-input:focus {
  outline: none;
  border-color: var(--green-700);
}
.activate-hint {
  font-size: 12px;
  color: var(--ink-500);
  text-align: center;
  margin-top: 8px;
}
.activate-error {
  padding: 12px 14px;
  border-radius: var(--r-md);
  background: var(--red-100);
  border: 1px solid #EF9A9A;
  color: var(--red-700);
  font-size: 13px;
  margin-top: 12px;
  animation: shake 0.4s ease-in-out;
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}
.btn-primary {
  width: 100%;
  padding: 14px;
  border-radius: var(--r-md);
  background: var(--green-700);
  color: white;
  font-weight: 700;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  border-bottom: 4px solid var(--green-900);
  transition: transform 0.05s, border-bottom-width 0.05s;
  margin-top: 16px;
}
.btn-primary:active:not(:disabled) {
  transform: translateY(2px);
  border-bottom-width: 0;
}
.btn-primary:disabled {
  background: var(--ink-300);
  border-bottom-color: var(--ink-500);
}
.activate-help {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--ink-100);
  font-size: 12px;
  color: var(--ink-500);
  line-height: 1.6;
}
.activate-help strong { color: var(--ink-700); }
.activate-help ul {
  margin: 6px 0 0 18px;
  list-style: disc;
}
.activate-admin-link {
  display: block;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--ink-100);
  text-align: center;
  font-size: 12px;
  color: var(--ink-500);
  text-decoration: none;
}
.activate-admin-link:hover { color: var(--ink-700); text-decoration: underline; }

/* ════════════════════════════════════════════════════════════════
   SELECTOR DE MÓDULO (A1/A2/B1)
   ════════════════════════════════════════════════════════════════ */
.module-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 32px;
}
@media (min-width: 600px) {
  .module-grid { grid-template-columns: repeat(3, 1fr); }
}
.module-card {
  background: var(--paper);
  border-radius: var(--r-lg);
  border: 1px solid var(--ink-100);
  border-bottom: 4px solid var(--ink-100);
  padding: 24px 20px;
  transition: transform 0.1s, box-shadow 0.15s, border-color 0.15s;
  text-align: left;
}
.module-card:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-bottom-color: var(--green-700);
}
.module-card:active:not(:disabled) {
  transform: translateY(0);
  border-bottom-width: 2px;
}
.module-card.locked { opacity: 0.5; }
.module-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--r-sm);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.module-badge.a1 { background: var(--green-100); color: var(--green-800); }
.module-badge.a2 { background: var(--gold-100); color: var(--gold-600); }
.module-badge.b1 { background: var(--red-100); color: var(--red-700); }
.module-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 4px;
}
.module-desc {
  font-size: 13px;
  color: var(--ink-500);
  margin-bottom: 16px;
  line-height: 1.5;
}
.module-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--ink-500);
  padding-top: 12px;
  border-top: 1px solid var(--ink-100);
}
.module-progress {
  font-weight: 700;
  color: var(--green-700);
}

/* ════════════════════════════════════════════════════════════════
   LISTA DE LECCIONES
   ════════════════════════════════════════════════════════════════ */
.lesson-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.lesson-item {
  background: var(--paper);
  border: 1px solid var(--ink-100);
  border-left: 4px solid var(--ink-100);
  border-radius: var(--r-md);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all 0.12s;
  text-align: left;
  width: 100%;
}
.lesson-item:hover:not(:disabled) {
  border-left-color: var(--green-700);
  background: var(--green-50);
}
.lesson-item.completed {
  border-left-color: var(--green-700);
  background: var(--green-50);
}
.lesson-item.current {
  border-left-color: var(--gold-500);
  background: var(--gold-100);
}
.lesson-item.locked {
  opacity: 0.45;
}
.lesson-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--cream-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 15px;
  color: var(--ink-700);
  flex-shrink: 0;
}
.lesson-item.completed .lesson-num {
  background: var(--green-700);
  color: white;
}
.lesson-item.current .lesson-num {
  background: var(--gold-500);
  color: white;
}
.lesson-info {
  flex: 1;
  min-width: 0;
}
.lesson-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 2px;
  flex-wrap: wrap;
}
.lesson-title {
  font-weight: 700;
  font-size: 15px;
  color: var(--ink-900);
}
.lesson-level {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  background: var(--ink-100);
  color: var(--ink-700);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.lesson-desc {
  font-size: 13px;
  color: var(--ink-500);
  line-height: 1.4;
}
.lesson-types {
  display: flex;
  gap: 6px;
  font-size: 14px;
  flex-shrink: 0;
}
.lesson-type-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  background: var(--cream-2);
}
.lesson-status {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--ink-300);
}
.lesson-item.completed .lesson-status { color: var(--green-700); }

/* ════════════════════════════════════════════════════════════════
   LECCIÓN (player de ejercicios)
   ════════════════════════════════════════════════════════════════ */
.lesson-screen {
  position: fixed;
  inset: 0;
  background: var(--cream);
  z-index: 50;
  display: flex;
  flex-direction: column;
}
.lesson-top {
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--paper);
  border-bottom: 1px solid var(--ink-100);
}
.lesson-close {
  padding: 6px;
  color: var(--ink-500);
  display: flex;
}
.lesson-close:hover { color: var(--ink-900); }
.lesson-progress {
  flex: 1;
  height: 8px;
  background: var(--ink-100);
  border-radius: 999px;
  overflow: hidden;
}
.lesson-progress-fill {
  height: 100%;
  background: var(--green-700);
  border-radius: 999px;
  transition: width 0.3s ease;
}
.lesson-hearts {
  display: flex;
  align-items: center;
  gap: 4px;
  font-weight: 700;
  color: var(--red-500);
  font-size: 15px;
}
.lesson-body {
  flex: 1;
  overflow-y: auto;
  padding: 28px 20px;
  max-width: 640px;
  width: 100%;
  margin: 0 auto;
}
.ex-instruction {
  font-size: 14px;
  color: var(--ink-500);
  margin-bottom: 8px;
  font-weight: 500;
}
.ex-prompt {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 24px;
  line-height: 1.3;
}
.ex-prompt-ipa {
  font-family: var(--font-ipa);
  font-size: 22px;
  color: var(--green-700);
  font-weight: 400;
  margin-left: 8px;
}
.ex-source-tag {
  font-size: 12px;
  color: var(--ink-500);
  margin-top: 20px;
  padding: 8px 12px;
  background: var(--cream-2);
  border-radius: var(--r-sm);
  border-left: 3px solid var(--green-600);
}
.ex-source-tag a { font-weight: 600; }
.ex-note {
  font-size: 13px;
  color: var(--ink-700);
  background: var(--gold-100);
  padding: 10px 14px;
  border-radius: var(--r-sm);
  margin-bottom: 16px;
  border-left: 3px solid var(--gold-500);
  line-height: 1.5;
}

/* Botones de audio */
.audio-btn {
  padding: 8px;
  border-radius: var(--r-sm);
  background: var(--green-50);
  color: var(--green-700);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
  vertical-align: middle;
}
.audio-btn:hover { background: var(--green-100); }
.audio-btn-big {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: var(--green-700);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  border-bottom: 4px solid var(--green-900);
  transition: transform 0.1s;
}
.audio-btn-big:hover { background: var(--green-800); }
.audio-btn-big:active { transform: translateY(2px); border-bottom-width: 0; }

/* Opciones */
.options-grid {
  display: grid;
  gap: 10px;
}
.option-btn {
  padding: 16px 18px;
  border-radius: var(--r-md);
  border: 2px solid var(--ink-100);
  border-bottom: 3px solid var(--ink-300);
  background: var(--paper);
  text-align: left;
  font-weight: 600;
  color: var(--ink-700);
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.1s;
  width: 100%;
}
.option-btn:hover:not(:disabled) {
  border-color: var(--green-500);
  background: var(--green-50);
}
.option-btn:active:not(:disabled) {
  transform: translateY(2px);
  border-bottom-width: 0;
}
.option-btn.correct {
  border-color: var(--green-500);
  background: var(--green-50);
  color: var(--green-800);
}
.option-btn.incorrect {
  border-color: var(--red-500);
  background: var(--red-100);
  color: var(--red-700);
}
.option-btn .key {
  display: inline-block;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--cream-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 13px;
  color: var(--ink-500);
  flex-shrink: 0;
}
.option-btn.correct .key { background: var(--green-700); color: white; }
.option-btn.incorrect .key { background: var(--red-500); color: white; }
.option-center { text-align: center; justify-content: center; }

/* Translate-select */
.sentence-box {
  background: var(--paper);
  border: 1px solid var(--ink-100);
  border-radius: var(--r-md);
  padding: 18px;
  margin-bottom: 20px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 500;
  color: var(--ink-900);
}
.answer-slots {
  min-height: 56px;
  padding: 8px;
  border-bottom: 2px solid var(--ink-300);
  border-radius: var(--r-md);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
  background: var(--paper);
  border: 1px solid var(--ink-100);
}
.word-chip {
  padding: 8px 14px;
  border-radius: var(--r-sm);
  background: var(--paper);
  border: 1px solid var(--ink-100);
  border-bottom: 2px solid var(--ink-300);
  font-weight: 600;
  color: var(--ink-700);
  font-size: 14px;
  transition: transform 0.05s;
}
.word-chip:active { transform: translateY(2px); border-bottom-width: 0; }
.word-chip.correct { background: var(--green-50); border-color: var(--green-500); color: var(--green-800); }
.word-chip.incorrect { background: var(--red-100); border-color: var(--red-500); color: var(--red-700); }
.word-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.check-btn {
  width: 100%;
  padding: 14px;
  border-radius: var(--r-md);
  background: var(--green-700);
  color: white;
  font-weight: 700;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  border-bottom: 4px solid var(--green-900);
  transition: transform 0.05s;
}
.check-btn:active:not(:disabled) { transform: translateY(2px); border-bottom-width: 0; }
.check-btn:disabled { background: var(--ink-300); border-bottom-color: var(--ink-500); }

/* Match pairs */
.match-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}
.match-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.match-btn {
  padding: 14px 10px;
  border-radius: var(--r-md);
  border: 2px solid var(--ink-100);
  border-bottom: 3px solid var(--ink-300);
  background: var(--paper);
  font-weight: 600;
  color: var(--ink-700);
  font-size: 14px;
  transition: all 0.1s;
  text-align: center;
}
.match-btn:hover:not(:disabled) {
  border-color: var(--green-500);
  background: var(--green-50);
}
.match-btn.selected {
  border-color: var(--green-500);
  background: var(--green-50);
  color: var(--green-800);
}
.match-btn.matched {
  opacity: 0.4;
  background: var(--green-100);
  border-color: var(--green-100);
  cursor: not-allowed;
}
.match-btn.wrong {
  border-color: var(--red-500);
  background: var(--red-100);
  animation: shake 0.4s;
}
.match-progress {
  text-align: center;
  font-size: 13px;
  color: var(--ink-500);
  margin-top: 12px;
}

/* Grammar exercises */
.grammar-sentence {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 600;
  color: var(--ink-900);
  margin-bottom: 24px;
  line-height: 1.5;
  padding: 20px;
  background: var(--paper);
  border-radius: var(--r-md);
  border: 1px solid var(--ink-100);
  border-left: 4px solid var(--green-600);
}
.grammar-blank {
  display: inline-block;
  min-width: 60px;
  padding: 2px 12px;
  margin: 0 4px;
  border-bottom: 3px solid var(--green-700);
  color: var(--green-700);
  font-weight: 700;
  text-align: center;
}
.grammar-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
.grammar-table th {
  background: var(--green-700);
  color: white;
  padding: 8px 12px;
  text-align: left;
  font-family: var(--font-serif);
  font-weight: 700;
}
.grammar-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--ink-100);
}
.grammar-table tr:nth-child(even) td { background: var(--cream-2); }

/* Pronunciation exercise */
.pron-target {
  text-align: center;
  margin-bottom: 24px;
}
.pron-word {
  font-family: var(--font-serif);
  font-size: 48px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 8px;
}
.pron-ipa {
  font-family: var(--font-ipa);
  font-size: 24px;
  color: var(--green-700);
  margin-bottom: 16px;
}
.pron-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.pron-btn {
  padding: 10px 16px;
  border-radius: var(--r-md);
  background: var(--paper);
  border: 1px solid var(--ink-100);
  font-weight: 600;
  font-size: 13px;
  color: var(--ink-700);
  display: flex;
  align-items: center;
  gap: 6px;
}
.pron-btn:hover { background: var(--cream-2); }
.mic-btn {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--red-500);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  border-bottom: 4px solid var(--red-700);
  transition: all 0.15s;
}
.mic-btn:hover { background: var(--red-600); }
.mic-btn.recording {
  background: var(--red-700);
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(211, 47, 47, 0.4); }
  50% { transform: scale(1.05); box-shadow: 0 0 0 12px rgba(211, 47, 47, 0); }
}
.pron-result {
  padding: 16px;
  border-radius: var(--r-md);
  margin-bottom: 16px;
  text-align: center;
}
.pron-result.excellent { background: var(--green-50); border: 1px solid var(--green-500); }
.pron-result.good { background: var(--gold-100); border: 1px solid var(--gold-500); }
.pron-result.retry { background: var(--red-100); border: 1px solid var(--red-500); }
.pron-result-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.pron-result.excellent .pron-result-title { color: var(--green-700); }
.pron-result.good .pron-result-title { color: var(--gold-600); }
.pron-result.retry .pron-result-title { color: var(--red-700); }
.pron-heard {
  font-size: 14px;
  color: var(--ink-700);
  margin-top: 8px;
}
.pron-heard strong { color: var(--ink-900); }

/* Feedback bar */
.feedback {
  border-top: 2px solid;
  padding: 16px 20px;
  animation: fadeIn 0.25s ease-out;
  background: var(--paper);
}
.feedback.correct { background: var(--green-50); border-color: var(--green-500); }
.feedback.incorrect { background: var(--red-100); border-color: var(--red-500); }
.feedback-inner {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.feedback-msg {
  display: flex;
  align-items: center;
  gap: 12px;
}
.feedback-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 18px;
  flex-shrink: 0;
}
.feedback.correct .feedback-icon { background: var(--green-700); }
.feedback.incorrect .feedback-icon { background: var(--red-500); }
.feedback-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 16px;
}
.feedback.correct .feedback-title { color: var(--green-800); }
.feedback.incorrect .feedback-title { color: var(--red-700); }
.feedback-correct {
  font-size: 13px;
  color: var(--ink-700);
}
.feedback-nota {
  font-size: 13px;
  color: var(--ink-700);
  margin-top: 2px;
}
.feedback-continue {
  padding: 12px 20px;
  border-radius: var(--r-md);
  color: white;
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 4px solid;
  transition: transform 0.05s;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}
.feedback-continue:active { transform: translateY(2px); border-bottom-width: 0; }
.feedback.correct .feedback-continue { background: var(--green-700); border-bottom-color: var(--green-900); }
.feedback.incorrect .feedback-continue { background: var(--red-500); border-bottom-color: var(--red-700); }

/* Mini-lección teórica */
.mini-lesson {
  background: var(--paper);
  border-radius: var(--r-lg);
  border: 1px solid var(--ink-100);
  padding: 28px 24px;
  margin-bottom: 24px;
}
.mini-lesson-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 16px;
  line-height: 1.3;
}
.mini-lesson-body {
  font-size: 15px;
  color: var(--ink-700);
  line-height: 1.7;
  margin-bottom: 16px;
}
.mini-lesson-body p { margin-bottom: 12px; }
.mini-lesson-body strong { color: var(--ink-900); }
.mini-lesson-body em { color: var(--green-700); font-style: italic; }
.mini-lesson-example {
  background: var(--cream-2);
  padding: 12px 16px;
  border-radius: var(--r-sm);
  border-left: 3px solid var(--green-600);
  margin: 12px 0;
  font-family: var(--font-serif);
  font-size: 15px;
}
.mini-lesson-source {
  font-size: 12px;
  color: var(--ink-500);
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--ink-100);
}
.mini-lesson-source a { font-weight: 600; }

/* Complete screen */
.complete-screen {
  position: fixed;
  inset: 0;
  background: var(--cream);
  z-index: 60;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  text-align: center;
  animation: fadeIn 0.3s;
}
.complete-emoji { font-size: 72px; margin-bottom: 16px; }
.complete-title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}
.complete-sub {
  font-size: 15px;
  color: var(--ink-500);
  margin-bottom: 32px;
  max-width: 320px;
}
.complete-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  width: 100%;
  max-width: 360px;
  margin-bottom: 24px;
}
.complete-stat {
  border-radius: var(--r-md);
  padding: 18px 12px;
  border: 2px solid;
  text-align: center;
  background: var(--paper);
}
.complete-stat.xp { border-color: var(--gold-500); }
.complete-stat.acc { border-color: var(--green-500); }
.complete-stat-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
  color: var(--ink-500);
}
.complete-stat-value {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
}
.complete-stat.xp .complete-stat-value { color: var(--gold-600); }
.complete-stat.acc .complete-stat-value { color: var(--green-700); }

/* Out of hearts */
.ooh-screen {
  position: fixed;
  inset: 0;
  background: var(--cream);
  z-index: 60;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  text-align: center;
}
.ooh-emoji { font-size: 72px; margin-bottom: 16px; }
.ooh-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 8px;
}
.ooh-sub {
  font-size: 14px;
  color: var(--ink-500);
  max-width: 320px;
  margin-bottom: 24px;
  line-height: 1.5;
}

/* Footer */
.app-footer {
  margin-top: auto;
  padding: 20px 16px;
  border-top: 1px solid var(--ink-100);
  background: var(--paper);
  text-align: center;
  font-size: 12px;
  color: var(--ink-500);
}
.app-footer strong { color: var(--green-700); }
.app-footer p { margin-top: 4px; font-size: 11px; color: var(--ink-300); }

/* Fonética lab */
.phonetics-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 600px) {
  .phonetics-grid { grid-template-columns: repeat(2, 1fr); }
}
.phon-card {
  background: var(--paper);
  border: 1px solid var(--ink-100);
  border-radius: var(--r-md);
  padding: 18px;
  transition: border-color 0.15s;
}
.phon-card:hover { border-color: var(--green-500); }
.phon-card-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 4px;
}
.phon-card-ipa {
  font-family: var(--font-ipa);
  font-size: 20px;
  color: var(--green-700);
  margin-bottom: 8px;
}
.phon-card-desc {
  font-size: 13px;
  color: var(--ink-500);
  line-height: 1.5;
  margin-bottom: 12px;
}
.phon-card-examples {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.phon-example {
  padding: 4px 10px;
  background: var(--cream-2);
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-700);
  cursor: pointer;
}
.phon-example:hover { background: var(--green-50); color: var(--green-700); }

/* Conjugador */
.conj-search {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--ink-100);
  border-radius: var(--r-md);
  font-size: 16px;
  margin-bottom: 16px;
  font-family: var(--font-serif);
}
.conj-search:focus { outline: none; border-color: var(--green-700); }
.conj-results {
  background: var(--paper);
  border: 1px solid var(--ink-100);
  border-radius: var(--r-md);
  padding: 20px;
}
.conj-verb {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 4px;
}
.conj-translation {
  font-size: 14px;
  color: var(--ink-500);
  margin-bottom: 16px;
  font-style: italic;
}
.conj-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.conj-table th {
  background: var(--green-700);
  color: white;
  padding: 10px;
  text-align: left;
  font-family: var(--font-serif);
}
.conj-table td {
  padding: 10px;
  border-bottom: 1px solid var(--ink-100);
}
.conj-table td:first-child {
  font-weight: 600;
  color: var(--ink-500);
  width: 30%;
}
.conj-table td:last-child {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--ink-900);
}

/* Hidden */
.hidden { display: none !important; }

/* SVG icons */
.icon { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.icon-sm { width: 16px; height: 16px; }
.icon-lg { width: 28px; height: 28px; }

/* Toast */
.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink-900);
  color: white;
  padding: 12px 20px;
  border-radius: var(--r-md);
  font-size: 14px;
  font-weight: 500;
  z-index: 100;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease-out;
}
@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(20px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* Progress view */
.progress-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
@media (min-width: 600px) {
  .progress-stats { grid-template-columns: repeat(4, 1fr); }
}
.progress-stat {
  background: var(--paper);
  border: 1px solid var(--ink-100);
  border-radius: var(--r-md);
  padding: 16px;
  text-align: center;
}
.progress-stat-num {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--green-700);
}
.progress-stat-label {
  font-size: 12px;
  color: var(--ink-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 4px;
}

/* Settings */
.settings-section {
  background: var(--paper);
  border: 1px solid var(--ink-100);
  border-radius: var(--r-md);
  padding: 20px;
  margin-bottom: 16px;
}
.settings-section h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 12px;
}
.settings-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--ink-100);
}
.settings-row:last-child { border-bottom: none; }
.settings-label { font-size: 14px; color: var(--ink-700); }
.settings-value { font-size: 14px; font-weight: 600; color: var(--ink-900); }
.settings-btn {
  padding: 8px 14px;
  border-radius: var(--r-sm);
  background: var(--cream-2);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-700);
}
.settings-btn:hover { background: var(--ink-100); }
.settings-btn.danger { background: var(--red-100); color: var(--red-700); }
.settings-btn.danger:hover { background: #EF9A9A; }

/* ════════════════════════════════════════════════════════════════
   BETA, AVISOS, VENTANAS Y RENOVACIÓN (añadido en Beta 0.1.0)
   ════════════════════════════════════════════════════════════════ */
.beta-badge {
  display: inline-block; vertical-align: middle;
  font: 700 10px/1 var(--font-sans); letter-spacing: 0.6px; text-transform: uppercase;
  padding: 3px 6px; border-radius: 4px;
  background: var(--gold-100); color: var(--gold-600); border: 1px solid var(--gold-400);
}
.beta-card, .install-card {
  background: var(--paper); border: 1px solid var(--gold-400); border-left: 4px solid var(--gold-500);
  border-radius: var(--r-md); padding: 14px 16px; margin-bottom: 16px; font-size: 14px; color: var(--ink-700);
}
.beta-card p + p { margin-top: 6px; }
.beta-card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.install-card { display: flex; gap: 12px; align-items: center; justify-content: space-between; border-color: var(--green-100); border-left-color: var(--green-700); }
.install-card span { color: var(--ink-500); font-size: 13px; }
.install-actions { display: flex; gap: 6px; align-items: center; flex-shrink: 0; }
.beta-close { background: none; border: none; font-size: 22px; line-height: 1; color: var(--ink-500); cursor: pointer; padding: 2px 6px; }
.link-btn { background: none; border: none; padding: 0; color: var(--green-700); font: inherit; font-weight: 600; text-decoration: underline; cursor: pointer; }
.section-h2 { font-family: var(--font-serif); font-size: 20px; margin: 24px 0 12px; color: var(--ink-900); }
.settings-value.mono { font-family: var(--font-mono); }
.tag-irregular, .tag-regular { font-size: 12px; padding: 2px 8px; border-radius: 4px; font-weight: 600; }
.tag-irregular { background: var(--gold-100); color: var(--gold-600); }
.tag-regular { background: var(--green-50); color: var(--green-700); }
.conj-tense { font-family: var(--font-serif); font-size: 15px; color: var(--green-700); margin-bottom: 8px; padding-bottom: 4px; border-bottom: 1px solid var(--ink-100); }
.progress-module { background: var(--paper); border: 1px solid var(--ink-100); border-radius: var(--r-md); padding: 16px; margin-bottom: 12px; }
.progress-bar { background: var(--ink-100); height: 8px; border-radius: 4px; overflow: hidden; }
.progress-bar > div { background: var(--green-700); height: 100%; }

.aviso-licencia {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 16px; background: var(--gold-100); color: var(--ink-900); font-size: 13px; font-weight: 600;
  border-bottom: 1px solid var(--gold-400);
}
.aviso-licencia.urgente { background: var(--red-100); border-bottom-color: var(--red-500); }
.aviso-btn, .aviso-actualizacion button {
  flex-shrink: 0; border: none; border-radius: var(--r-sm); padding: 8px 14px;
  background: var(--green-700); color: #fff; font-weight: 700; font-size: 13px; cursor: pointer;
}
.aviso-actualizacion {
  position: fixed; left: 12px; right: 12px; bottom: calc(76px + env(safe-area-inset-bottom)); z-index: 300;
  max-width: 480px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--ink-900); color: #fff; padding: 12px 14px; border-radius: var(--r-md); box-shadow: var(--shadow-lg); font-size: 14px;
}
.aviso-actualizacion button { background: var(--gold-500); color: var(--ink-900); }

.lesson-report { background: none; border: none; font-size: 18px; color: var(--ink-500); cursor: pointer; padding: 4px 6px; }
.pron-skip { display: block; margin: 16px auto 0; font-size: 13px; color: var(--ink-500); }

.modal-fondo {
  position: fixed; inset: 0; z-index: 500; background: rgba(0,0,0,0.45);
  display: flex; align-items: flex-end; justify-content: center;
}
@media (min-width: 600px) { .modal-fondo { align-items: center; padding: 24px; } }
.modal {
  position: relative; background: var(--paper); width: 100%; max-width: 520px; max-height: 92vh; overflow-y: auto;
  border-radius: var(--r-lg) var(--r-lg) 0 0; padding: 22px 18px calc(22px + env(safe-area-inset-bottom));
}
@media (min-width: 600px) { .modal { border-radius: var(--r-lg); } }
.modal-cerrar { position: absolute; top: 10px; right: 12px; background: none; border: none; font-size: 26px; color: var(--ink-500); cursor: pointer; }
.modal-titulo { font-family: var(--font-serif); font-size: 22px; margin: 0 28px 8px 0; color: var(--ink-900); }
.modal-sub { font-size: 14px; color: var(--ink-500); margin-bottom: 14px; line-height: 1.5; }
.campo {
  display: block; width: 100%; margin-bottom: 12px; padding: 11px 12px; font: inherit; font-size: 16px;
  border: 2px solid var(--ink-100); border-radius: var(--r-sm); background: var(--paper); color: var(--ink-900);
}
.campo:focus { outline: none; border-color: var(--green-600); }
.instrucciones-pago { white-space: pre-line; background: var(--cream); border-radius: var(--r-sm); padding: 10px 12px; font-size: 14px; margin: -4px 0 12px; }
.instrucciones-pago:empty { display: none; }
.pagos-previos { margin-bottom: 14px; }
.pagos-previos h3 { font-size: 14px; margin-bottom: 6px; }
.pago-previo { font-size: 13px; padding: 8px 10px; background: var(--cream); border-radius: var(--r-sm); margin-bottom: 6px; }
.pago-previo small { display: block; color: var(--red-700); }
.pago-ok { text-align: center; padding: 12px 0; }
.pago-ok h3 { font-family: var(--font-serif); margin: 8px 0; }
.renovar-embebido { text-align: left; margin-top: 20px; border-top: 1px solid var(--ink-100); padding-top: 16px; }
.novedad { border-top: 1px solid var(--ink-100); padding: 12px 0; }
.novedad-head { display: flex; justify-content: space-between; font-size: 14px; margin-bottom: 6px; }
.novedad-head span { color: var(--ink-500); }
.novedad ul { padding-left: 18px; font-size: 14px; color: var(--ink-700); }
.instalar-pasos { border: 1px solid var(--ink-100); border-radius: var(--r-md); padding: 12px 14px; margin-top: 12px; font-size: 14px; }
.instalar-pasos.destacado { border-color: var(--green-600); background: var(--green-50); }
.instalar-pasos h3 { font-size: 15px; margin-bottom: 6px; }
.instalar-pasos ol { padding-left: 18px; }

/* Barra superior en celulares estrechos: que quepan las 4 estadísticas. */
@media (max-width: 480px) {
  .topbar-inner { gap: 8px; }
  .stats { gap: 4px; font-size: 13px; }
  .stat { padding: 5px 6px; gap: 2px; }
  .brand { gap: 8px; }
  .brand-logo { width: 34px; height: 34px; }
  .brand-name { font-size: 17px; }
  .brand-name .beta-badge { display: none; }   /* el sello sigue visible en la tarjeta Beta y en Ajustes */
  .brand-sub::after { content: ' · Beta'; color: var(--gold-600); }
}
.treccani-link {
  display: inline-block; vertical-align: middle; margin-left: 6px;
  font: 600 12px var(--font-sans); color: var(--green-700); text-decoration: none;
  padding: 3px 8px; border: 1px solid var(--green-100); border-radius: 999px; background: var(--green-50);
}

/* Preguntas frecuentes y contacto de ayuda */
.faq-seccion { font-size: 15px; margin: 18px 0 6px; color: var(--ink-700); }
.faq-item { border-bottom: 1px solid var(--ink-100, #e5e5e5); padding: 10px 0; }
.faq-item summary { cursor: pointer; font-weight: 600; font-size: 14px; }
.faq-r { font-size: 14px; color: var(--ink-700); padding-top: 6px; }
.faq-r p, .faq-r ul, .faq-r ol { margin: 6px 0; }
.faq-r ul, .faq-r ol { padding-left: 20px; }
.contacto-ayuda:not(:empty) { margin-top: 8px; }

/* iPhone sin instalar: pasos antes de activar */
.ios-instalar { background: var(--gold-100, #FFF8E1); border-left: 4px solid var(--gold-500, #C9A227); border-radius: 8px; padding: 12px 14px; margin: 12px 0; font-size: 14px; color: var(--ink-700); }
.ios-instalar p, .ios-instalar ol { margin: 6px 0; }
.ios-instalar ol { padding-left: 20px; }