/* ============================================
   ACADEMY APP — ESTILOS BASE
   Paleta: azul petróleo + ámbar + neutros cálidos
   Pensada para legibilidad y confianza (audiencia 45-65)
   ============================================ */

:root {
  --color-primary: #0d4f5c;
  --color-primary-dark: #083640;
  --color-primary-light: #1a6b7a;
  --color-accent: #d4920a;
  --color-accent-dark: #b87c08;
  --color-bg: #faf8f5;
  --color-surface: #ffffff;
  --color-text: #1c2b30;
  --color-text-soft: #4a5a60;
  --color-border: #e2ddd5;
  --color-error: #c0392b;
  --color-success: #1e8449;
  --shadow-sm: 0 1px 3px rgba(13, 79, 92, 0.08);
  --shadow-md: 0 4px 16px rgba(13, 79, 92, 0.12);
  --shadow-lg: 0 8px 32px rgba(13, 79, 92, 0.16);
  --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --radius: 12px;
}

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

body {
  font-family: var(--font-base);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* LAYOUT DE AUTENTICACIÓN */
.auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}
.auth-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 440px;
  padding: 40px;
}
.auth-logo { text-align: center; margin-bottom: 8px; }
.auth-logo .emoji { font-size: 40px; }
.auth-title {
  font-size: 26px;
  font-weight: 700;
  text-align: center;
  color: var(--color-primary);
  margin-bottom: 6px;
}
.auth-subtitle {
  text-align: center;
  color: var(--color-text-soft);
  margin-bottom: 28px;
  font-size: 15px;
}

/* FORMULARIOS */
.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 6px;
  color: var(--color-text);
}
.form-input {
  width: 100%;
  padding: 13px 15px;
  font-size: 16px;
  font-family: inherit;
  border: 2px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-input:focus {
  outline: none;
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(26, 107, 122, 0.12);
}
.form-hint { font-size: 13px; color: var(--color-text-soft); margin-top: 5px; }

/* BOTONES */
.btn {
  display: inline-block;
  width: 100%;
  padding: 14px 20px;
  font-size: 17px;
  font-weight: 700;
  font-family: inherit;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.1s, background 0.15s, box-shadow 0.15s;
  text-align: center;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--color-primary-dark); box-shadow: var(--shadow-md); }
.btn-accent { background: var(--color-accent); color: #fff; }
.btn-accent:hover { background: var(--color-accent-dark); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* MENSAJES */
.alert {
  padding: 12px 15px;
  border-radius: 10px;
  font-size: 15px;
  margin-bottom: 18px;
  display: none;
}
.alert.show { display: block; }
.alert-error { background: #fdecea; color: var(--color-error); border: 1px solid #f5c6c0; }
.alert-success { background: #eafaf1; color: var(--color-success); border: 1px solid #c0ecd2; }

/* PIE DE FORMULARIO */
.auth-footer {
  text-align: center;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  font-size: 15px;
  color: var(--color-text-soft);
}
.auth-footer a { font-weight: 600; }

/* RESPONSIVE */
@media (max-width: 480px) {
  .auth-card { padding: 28px 22px; }
  .auth-title { font-size: 23px; }
}

/* ============================================
   APP SHELL (dashboard)
   ============================================ */
.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}
.app-header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.app-brand {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.app-nav { display: flex; align-items: center; gap: 20px; }
.app-nav a { font-weight: 600; color: var(--color-text-soft); font-size: 15px; }
.app-nav a:hover { color: var(--color-primary); text-decoration: none; }
.btn-logout {
  background: none;
  border: 1.5px solid var(--color-border);
  color: var(--color-text-soft);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}
.btn-logout:hover { border-color: var(--color-primary); color: var(--color-primary); }

.app-main { max-width: 1100px; margin: 0 auto; padding: 32px 24px; }
.page-title { font-size: 28px; font-weight: 800; color: var(--color-text); margin-bottom: 4px; }
.page-subtitle { color: var(--color-text-soft); margin-bottom: 28px; }

/* GRID DE CURSOS */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 22px;
}
.course-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s, box-shadow 0.15s;
  display: flex;
  flex-direction: column;
}
.course-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.course-thumb {
  height: 150px;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
}
.course-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.course-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
  width: fit-content;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.badge-free { background: #eafaf1; color: var(--color-success); }
.badge-paid { background: #fef5e7; color: var(--color-accent-dark); }
.badge-owned { background: #e8f4f6; color: var(--color-primary); }
.course-card-title { font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--color-text); }
.course-card-desc { font-size: 14px; color: var(--color-text-soft); margin-bottom: 16px; flex: 1; }
.course-card-footer { margin-top: auto; }
.course-price { font-size: 20px; font-weight: 800; color: var(--color-accent-dark); margin-bottom: 10px; }

.btn-sm { padding: 11px 16px; font-size: 15px; }

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-soft);
}

/* ============================================
   REPRODUCTOR DE CURSO
   ============================================ */
.course-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 28px;
  align-items: start;
}
@media (max-width: 900px) {
  .course-layout { grid-template-columns: 1fr; }
}

/* Columna izquierda: video */
.player-wrap {
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  aspect-ratio: 16 / 9;
}
.player-wrap iframe { width: 100%; height: 100%; border: 0; display: block; }

.lesson-info { margin-top: 20px; }
.lesson-info h2 { font-size: 22px; color: var(--color-text); margin-bottom: 8px; }
.lesson-info p { color: var(--color-text-soft); }

/* Candado de pago */
.locked-player {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  padding: 30px;
  box-shadow: var(--shadow-md);
}
.locked-player .lock-icon { font-size: 52px; margin-bottom: 16px; }
.locked-player h2 { font-size: 24px; margin-bottom: 10px; }
.locked-player p { font-size: 16px; opacity: 0.9; margin-bottom: 8px; max-width: 420px; }
.locked-player .price { font-size: 30px; font-weight: 800; margin: 14px 0; color: var(--color-accent); }
.locked-player .btn { max-width: 280px; margin-top: 8px; }

/* Columna derecha: lista de lecciones */
.lessons-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  position: sticky;
  top: 80px;
}
.lessons-panel-header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}
.lessons-panel-header h3 { font-size: 17px; color: var(--color-primary); }
.module-group { padding: 8px 0; }
.module-name {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--color-text-soft);
  padding: 10px 20px 6px;
}
.lesson-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: background 0.12s;
}
.lesson-item:hover { background: var(--color-bg); }
.lesson-item.active {
  background: #e8f4f6;
  border-left-color: var(--color-primary);
}
.lesson-item.locked { cursor: default; opacity: 0.7; }
.lesson-icon { font-size: 18px; flex-shrink: 0; }
.lesson-meta { flex: 1; min-width: 0; }
.lesson-meta .name { font-size: 15px; font-weight: 600; color: var(--color-text); }
.lesson-meta .dur { font-size: 13px; color: var(--color-text-soft); }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--color-text-soft);
  margin-bottom: 18px;
}
.back-link:hover { color: var(--color-primary); text-decoration: none; }

/* ============================================
   PANEL DE ADMINISTRACIÓN
   ============================================ */
.admin-badge {
  background: var(--color-accent);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  margin-left: 8px;
  text-transform: uppercase;
}
.admin-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}
.btn-inline {
  width: auto;
  display: inline-block;
  padding: 10px 18px;
  font-size: 15px;
}

.admin-table {
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  border-collapse: collapse;
  overflow: hidden;
}
.admin-table th {
  text-align: left;
  padding: 14px 16px;
  background: var(--color-bg);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--color-text-soft);
  border-bottom: 1px solid var(--color-border);
}
.admin-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
}
.admin-table tr:last-child td { border-bottom: none; }
.status-pill {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
}
.status-published { background: #eafaf1; color: var(--color-success); }
.status-draft { background: #f3f1ec; color: var(--color-text-soft); }

.row-actions { display: flex; gap: 8px; }
.icon-btn {
  background: none;
  border: 1.5px solid var(--color-border);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  color: var(--color-text-soft);
}
.icon-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.icon-btn.danger:hover { border-color: var(--color-error); color: var(--color-error); }

/* MODAL */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8, 54, 64, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 1000;
}
.modal-overlay.show { display: flex; }
.modal {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 28px;
}
.modal h3 { font-size: 21px; color: var(--color-primary); margin-bottom: 20px; }
.modal-actions { display: flex; gap: 12px; margin-top: 24px; }
.modal-actions .btn { flex: 1; }
.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text-soft);
  border: 1.5px solid var(--color-border);
}
.btn-secondary:hover { background: #efe9e0; }

.form-row { display: flex; gap: 14px; }
.form-row .form-group { flex: 1; }
.checkbox-row { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; }
.checkbox-row input { width: 20px; height: 20px; }
.checkbox-row label { font-size: 15px; font-weight: 600; }

.admin-section { margin-top: 36px; }
.module-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
}
.module-block-header {
  background: var(--color-bg);
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.module-block-header h4 { font-size: 16px; color: var(--color-text); }
.lesson-row {
  padding: 12px 18px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.lesson-row .meta { font-size: 14px; }
.lesson-row .meta .yt { font-size: 12px; color: var(--color-text-soft); }
.hint-box {
  background: #fef9ef;
  border: 1px solid #f5e3c0;
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 14px;
  color: var(--color-text-soft);
  margin-bottom: 20px;
}