:root {
  --bg: #F6F8F6;
  --card: #FFFFFF;
  --ink: #0A120E;
  --muted: #56665D;
  --line: rgba(10, 18, 14, 0.06);
  --accent: #154D38;
  --accent-soft: rgba(21, 77, 56, 0.05);
  --accent-solid: #1C664A;
  --amber: #C97A14;
  --amber-soft: rgba(201, 122, 20, 0.06);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px -4px rgba(10, 18, 14, 0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #080E0B;
    --card: #101814;
    --ink: #EDF3EF;
    --muted: #7E9185;
    --line: rgba(237, 243, 239, 0.06);
    --accent: #32A37B;
    --accent-soft: rgba(50, 163, 123, 0.06);
    --accent-solid: #3EB389;
    --amber: #EAA035;
    --amber-soft: rgba(234, 160, 53, 0.08);
    --shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
  }
}

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

body {
  background-color: var(--bg);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* Contenedor tipo App nativa */
.app-container {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg);
}

.app-header {
  position: fixed; top: 0; width: 100%; max-width: 480px;
  background: rgba(246, 248, 246, 0.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  padding: 16px 20px; z-index: 100;
  border-bottom: 1px solid var(--line);
}
@media (prefers-color-scheme: dark) {
  .app-header { background: rgba(8, 14, 11, 0.85); }
}

.wordmark {
  font-family: 'Fraunces', serif; font-weight: 700; font-size: 18px;
  display: flex; align-items: center; gap: 6px;
}
.wordmark .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-solid); }

.app-content {
  padding: 84px 18px 110px; /* Margen para no chocar con header y barra inferior */
  flex-grow: 1;
}

/* Sistema de Pestañas (Panes) */
.tab-pane {
  display: none;
  animation: fadeIn 0.3s ease;
}
.tab-pane.active { display: flex; flex-direction: column; gap: 20px; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.intro-block h1 { font-family: 'Fraunces', serif; font-size: 26px; font-weight: 600; margin-bottom: 4px; }
.intro-block .sub { color: var(--muted); font-size: 14px; line-height: 1.4; }

/* Tarjetas */
.income-card, .extra-card, .leak-card, .afp-card, .course-card, .kids-card, .cat-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 20px; box-shadow: var(--shadow);
}

.premium-badge-title {
  font-size: 11px; font-weight: 700; letter-spacing: 0.08em; color: var(--accent-solid); margin-bottom: 12px;
}
.premium-badge-title.setup-upsell { color: var(--amber); }

/* Inputs */
.income-input-row, .extra-row, .afp-sim-row, .cat-bottom {
  display: flex; align-items: center; gap: 8px; background: var(--bg);
  padding: 12px 16px; border-radius: var(--radius-md); margin: 10px 0;
}
#income, .amt-input, #afpSalario, #extraIncome {
  font-family: 'IBM Plex Mono', monospace; font-size: 24px; font-weight: 600;
  border: none; background: transparent; color: var(--ink); width: 100%; outline: none;
}
.currency, .amt-currency { font-family: 'IBM Plex Mono', monospace; font-size: 22px; color: var(--muted); }

.type-toggle { display: flex; background: var(--bg); padding: 4px; border-radius: 999px; margin-bottom: 12px; }
.type-btn { flex: 1; text-align: center; padding: 8px; border-radius: 999px; font-size: 13px; font-weight: 600; color: var(--muted); cursor: pointer; }
.type-btn.active { background: var(--card); color: var(--accent-solid); box-shadow: 0 2px 8px rgba(0,0,0,0.02); }

.variable-banner, .extra-tip, .afp-sim-result { display: none; font-size: 12px; line-height: 1.5; color: var(--muted); margin-top: 8px; }
.variable-banner.show, .extra-tip.show, .afp-sim-result.show { display: block; }

/* Chips */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { padding: 10px 16px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); font-size: 13.5px; font-weight: 500; cursor: pointer; display: flex; align-items: center; gap: 6px; }
.chip.active { background: var(--ink); color: var(--card); border-color: var(--ink); }
.chip .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--line); }
.chip.active .dot { background: var(--accent-solid); }

/* Barras */
.bar { background: var(--line); height: 8px; border-radius: 999px; overflow: hidden; margin: 12px 0 4px; }
.bar-seg { height: 100%; }
.bar-caption { display: flex; justify-content: space-between; font-size: 11.5px; color: var(--muted); }

/* Videos Nativos Incrustados (Sin Popups) */
.video-native-box { width: 100%; margin-bottom: 14px; border-radius: var(--radius-md); overflow: hidden; }
.video-embed-container { position: relative; width: 100%; aspect-ratio: 16 / 9; background: #000; }
.video-embed-container iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: none; }
.video-placeholder-luxury { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: #0A120E; color: #FFF; font-size: 12.5px; font-weight: 500; cursor: pointer; text-align: center; padding: 10px; }

/* Listas e Items de Control */
.course-list-minimal, .leak-item, .kids-task { display: flex; flex-direction: column; gap: 2px; margin-top: 8px; }
.course-item, .leak-item, .kids-task { display: flex; flex-direction: row; align-items: center; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.course-item:last-child, .leak-item:last-child, .kids-task:last-child { border-bottom: none; }
.course-num { width: 22px; height: 22px; border-radius: 50%; background: var(--line); font-family: 'IBM Plex Mono', monospace; font-size: 11px; font-weight: 600; display: flex; align-items: center; justify-content: center; }
.course-item.unlocked .course-num { background: var(--accent-soft); color: var(--accent-solid); }
.course-info-text, .leak-text, .kids-task-text { font-size: 13px; color: var(--ink); }
.course-item.locked { opacity: 0.5; }

/* Acordeón Elegante */
.luxury-accordion { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); }
.luxury-accordion summary { font-size: 13px; font-weight: 600; color: var(--accent-solid); cursor: pointer; list-style: none; }
.accordion-content { padding-top: 10px; font-size: 12.5px; color: var(--muted); display: flex; flex-direction: column; gap: 6px; }

/* Casillas Circulares */
.leak-checkbox, .kids-task-check, .xmas-week-check { width: 20px; height: 20px; border-radius: 50%; border: 2px solid var(--line); display: flex; align-items: center; justify-content: center; font-size: 11px; color: #fff; cursor: pointer; }
.leak-checkbox.checked, .kids-task-check.checked, .xmas-week-check.checked { background: var(--accent-solid); border-color: var(--accent-solid); }

/* Reto Navidad Layout Moderno */
.xmas-levels { display: flex; gap: 6px; margin-bottom: 14px; }
.xmas-level { flex: 1; text-align: center; padding: 8px; border-radius: var(--radius-sm); border: 1px solid var(--line); cursor: pointer; }
.xmas-level.active { background: var(--accent-soft); border-color: var(--accent-solid); }
.xmas-level-name { font-size: 11px; font-weight: 700; color: var(--muted); }
.xmas-level-amt { font-family: 'IBM Plex Mono', monospace; font-size: 12px; font-weight: 600; }
.xmas-goal { background: var(--accent-soft); padding: 14px; border-radius: var(--radius-md); text-align: center; margin-bottom: 14px; }
.xmas-goal .num { font-family: 'IBM Plex Mono', monospace; font-size: 18px; font-weight: 700; color: var(--accent-solid); }
.xmas-goal .lbl { font-size: 11.5px; color: var(--muted); margin-top: 2px; }

#xmasWeeks { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; max-height: 260px; overflow-y: auto; padding-right: 4px; }
.xmas-week { background: var(--bg); padding: 10px; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: space-between; }
.xmas-week-label { font-size: 12px; font-weight: 500; }
.xmas-week-amt { font-family: 'IBM Plex Mono', monospace; font-size: 12px; font-weight: 600; }

/* Módulo Niños */
.kids-full { display: none; }
.kids-full.show { display: block; }
.kids-unlock-btn { width: 100%; padding: 12px; background: var(--amber); border: none; color: #fff; font-weight: 700; border-radius: var(--radius-md); font-size: 13px; cursor: pointer; }

/* Barra de Navegación Fija Inferior (Estilo iOS/Android Premium) */
.bottom-nav {
  position: fixed; bottom: 0; left: 0; width: 100%; max-width: 480px; left: 50%; transform: translateX(-50%);
  background: rgba(255, 255, 255, 0.85); backdrop-filter: blur(25px); -webkit-backdrop-filter: blur(25px);
  border-top: 1px solid var(--line); display: flex; padding: 8px 10px 24px; z-index: 100;
}
@media (prefers-color-scheme: dark) {
  .bottom-nav { background: rgba(16, 24, 20, 0.85); }
}
.nav-item { flex: 1; background: none; border: none; display: flex; flex-direction: column; align-items: center; gap: 4px; color: var(--muted); cursor: pointer; }
.nav-item.active { color: var(--accent-solid); }
.nav-icon { font-size: 20px; }
.nav-label { font-size: 11px; font-weight: 600; }

/* Modales y Botón Resumen */
.summary-btn { width: 100%; padding: 14px; background: var(--accent-solid); color: #fff; border: none; border-radius: var(--radius-md); font-size: 14px; font-weight: 600; cursor: pointer; margin-top: 12px; }
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.4); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); z-index: 200; align-items: flex-end; justify-content: center; }
.modal-overlay.show { display: flex; }
.modal-sheet { background: var(--card); width: 100%; max-width: 480px; border-radius: 20px 20px 0 0; padding: 24px 20px 34px; max-height: 80vh; overflow-y: auto; }
.modal-top { display: flex; justify-content: space-between; margin-bottom: 12px; }
.modal-title { font-family: 'Fraunces', serif; font-size: 20px; }
.close-btn { background: none; border: none; font-size: 16px; color: var(--muted); cursor: pointer; }
.summary-total { background: var(--bg); padding: 16px; border-radius: var(--radius-md); text-align: center; margin-bottom: 12px; }
.summary-total .num { font-family: 'IBM Plex Mono', monospace; font-size: 26px; font-weight: 700; }
.summary-total .lbl { font-size: 11px; color: var(--muted); }
.summary-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.whatsapp-btn { display: block; text-align: center; padding: 12px; background: #25D366; color: #fff; text-decoration: none; border-radius: var(--radius-md); font-weight: 600; font-size: 13.5px; margin-top: 14px; }
footer { text-align: center; font-size: 11px; color: var(--muted); padding: 20px 0; }