/* ============================================================
   INNOVA-STEAM — Stellar Design System v4
   Online Academy / LMS aesthetic — Udemy / Coursera / Khan style
   Light main content area, dark sidebar, clean cards, progress visible
   ============================================================ */

/* Las fuentes las carga header.php con <link>. Un @import aquí obligaba
   al navegador a descargar primero este CSS para descubrir la fuente,
   encadenando dos peticiones en vez de lanzarlas en paralelo — y
   duplicaba la que el header ya hacía. */

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  /* Backgrounds */
  --bg-page:    #EFF1ED;
  --bg-surface: #ffffff;
  --bg-card:    #ffffff;
  --bg-input:   #F7F9F5;
  --bg-muted:   #E9EDE6;
  --bg-border:  #DCE1D9;
  --bg-hover:   #F2F5EF;

  /* Text */
  --text-primary:   #16211C;
  --text-secondary: #3F4F48;
  --text-muted:     #6B7A72;
  --text-inverse:   #ffffff;

  /* Brand / Accent */
  --accent:        #23697E;
  --accent-hover:  #1B5567;
  --accent-light:  rgba(35, 105, 126, .10);
  --accent-border: rgba(35, 105, 126, .30);

  /* Status */
  --success:       #2E8B57;
  --success-light: rgba(46, 139, 87, .10);
  --danger:        #C0453F;
  --danger-light:  rgba(192, 69, 63, .10);
  --warning:       #A9702B;
  --warning-light: rgba(169, 112, 43, .10);
  --info:          #23697E;
  --info-light:    rgba(35, 105, 126, .10);

  /* Stars / Gold */
  --star-color: #DFA426;
  --gold:       #C9942F;

  /* Elevated surface (cards within cards, quiz options, etc.) */
  --bg-elevated: #F2F5EF;
  /* Alias histórico: admin/reportes.php y admin/usuarios.php lo usan sin
     valor de reserva, así que sin definirlo los botones de paginación se
     quedaban sin fondo. */
  --bg-card-alt: #F2F5EF;

  /* Texto sobre los tintes de estado (--*-light). El color de estado a
     secas no llega a 4.5:1 sobre su propio tinte. */
  --success-text: #1F6B41;
  --danger-text:  #9A2E2A;
  --warning-text: #7E5116;
  --info-text:    #1B5567;

  /* Sidebar (dark) */
  --sidebar-bg:      #0F1A20;
  --sidebar-surface: #16242C;
  --sidebar-border:  #223039;
  --sidebar-text:    #93A6A0;
  --sidebar-active:  #ffffff;

  /* Extended palette — used by admin/docente pages */
  --blue:   #3C82B4;
  --green:  #2E8B57;
  --purple: #7C6BB0;
  --coral:  #C4643F;
  --teal:   #23697E;

  /* Sidebar width — consumed by sidebar.css */
  --sidebar-width: 240px;

  /* Radius */
  --radius-sm: 8px;
  --radius:    12px;
  --radius-lg: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(17, 34, 30, .06), 0 1px 2px rgba(17, 34, 30, .04);
  --shadow:    0 4px 16px rgba(17, 34, 30, .10);
  --shadow-lg: 0 8px 32px rgba(17, 34, 30, .14);

  /* Transition */
  --transition: 150ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg-page);
  color: var(--text-primary);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

img, video {
  display: block;
  max-width: 100%;
}

/* Reset: la inmensa mayoría de las listas de la plataforma son menús y
   rejillas, no prosa. Una lista que sí es prosa pide .lista-prosa. */
ul, ol {
  list-style: none;
}

.lista-prosa {
  list-style: disc;
  padding-left: 20px;
}
.lista-prosa > li { margin-bottom: 6px; }
.lista-prosa > li::marker { color: var(--text-muted); }

button {
  cursor: pointer;
  font-family: inherit;
}

hr {
  border: none;
  border-top: 1px solid var(--bg-border);
  margin: 24px 0;
}

/* ── Typography ────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem;     font-family: 'Inter', sans-serif; font-weight: 600; }
h6 { font-size: 0.875rem; font-family: 'Inter', sans-serif; font-weight: 600; }

p {
  color: var(--text-secondary);
  line-height: 1.7;
}

small {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ── Card ──────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
}

.card-title {
  font-family: 'Syne', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.card-subtitle {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.card-body {
  color: var(--text-secondary);
}

.card-footer {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--bg-border);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition),
              color var(--transition), box-shadow var(--transition),
              transform var(--transition);
  white-space: nowrap;
  user-select: none;
}

.btn:disabled,
.btn[disabled] {
  opacity: 0.45;
  pointer-events: none;
}

/* Primary */
.btn-primary {
  background: var(--accent);
  color: var(--text-inverse);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--text-inverse);
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(35, 105, 126, .30);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--bg-border);
}
.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--bg-border);
  text-decoration: none;
}

/* Success */
.btn-success {
  background: var(--success);
  color: var(--text-inverse);
  border-color: var(--success);
}
.btn-success:hover {
  background: var(--success-text);
  border-color: var(--success-text);
  color: var(--text-inverse);
  text-decoration: none;
}

/* Danger */
.btn-danger {
  background: var(--danger);
  color: var(--text-inverse);
  border-color: var(--danger);
}
.btn-danger:hover {
  background: var(--danger-text);
  border-color: var(--danger-text);
  color: var(--text-inverse);
  text-decoration: none;
}

/* Outline */
.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent-border);
}
.btn-outline:hover {
  background: var(--accent-light);
  color: var(--accent-hover);
  border-color: var(--accent);
  text-decoration: none;
}

/* Sizes */
.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}
.btn-lg {
  padding: 12px 28px;
  font-size: 14px;
}

/* Full-width */
.btn-block {
  display: flex;
  width: 100%;
}

/* ── Badges ────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 99px;
  line-height: 1.6;
  white-space: nowrap;
}

.badge-blue {
  background: var(--accent-light);
  color: var(--accent);
}

.badge-green {
  background: var(--success-light);
  color: var(--success);
}

.badge-red {
  background: var(--danger-light);
  color: var(--danger);
}

.badge-amber {
  background: var(--warning-light);
  color: var(--warning);
}

.badge-muted {
  background: var(--bg-muted);
  color: var(--text-muted);
  border: 1px solid var(--bg-border);
}

/* Legacy aliases for backward compatibility */
.badge-accent   { background: var(--accent-light);   color: var(--accent); }
.badge-success  { background: var(--success-light);  color: var(--success); }
.badge-danger   { background: var(--danger-light);   color: var(--danger); }
.badge-warning  { background: var(--warning-light);  color: var(--warning); }
.badge-default  { background: var(--bg-muted); color: var(--text-muted); border: 1px solid var(--bg-border); }

/* ── Form Controls ─────────────────────────────────────────── */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-label .required {
  color: var(--danger);
  margin-left: 2px;
}

.form-control {
  display: block;
  width: 100%;
  padding: 9px 12px;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition),
              background var(--transition);
  appearance: none;
}

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

.form-control:hover {
  border-color: var(--bg-border);
}

.form-control:focus {
  border-color: var(--accent);
  background: var(--bg-surface);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-control:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  background: var(--bg-muted);
}

textarea.form-control {
  resize: vertical;
  min-height: 96px;
}

select.form-control {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236B7A72' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
  cursor: pointer;
}

.form-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.form-error {
  font-size: 12px;
  color: var(--danger);
  margin-top: 4px;
}

/* ── Alerts — left colored border style ────────────────────── */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  line-height: 1.5;
  border: 1px solid transparent;
  border-left-width: 4px;
}

.alert-success {
  background: var(--success-light);
  color: var(--success-text);
  border-color: var(--success-light);
  border-left-color: var(--success);
}

.alert-error {
  background: var(--danger-light);
  color: var(--danger-text);
  border-color: var(--danger-light);
  border-left-color: var(--danger);
}

.alert-warning {
  background: var(--warning-light);
  color: var(--warning-text);
  border-color: var(--warning-light);
  border-left-color: var(--warning);
}

.alert-info {
  background: var(--accent-light);
  color: var(--info-text);
  border-color: var(--accent-light);
  border-left-color: var(--accent);
}

/* ── Progress ──────────────────────────────────────────────── */
.progress-track {
  width: 100%;
  height: 6px;
  background: var(--bg-muted);
  border-radius: 99px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 99px;
  transition: width 0.4s ease;
}

.progress-fill.success { background: var(--success); }
.progress-fill.warning { background: var(--warning); }
.progress-fill.danger  { background: var(--danger); }

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ── Page Header ───────────────────────────────────────────── */
.page-header {
  margin-bottom: 28px;
}

.page-title {
  font-family: 'Syne', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
}

.page-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ── Stat Cards ────────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon.blue   { background: var(--accent-light);   color: var(--accent); }
.stat-icon.green  { background: var(--success-light);  color: var(--success); }
.stat-icon.red    { background: var(--danger-light);   color: var(--danger); }
.stat-icon.amber  { background: var(--warning-light);  color: var(--warning); }

.stat-card .stat-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.stat-card .stat-value {
  font-family: 'Syne', sans-serif;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.stat-card .stat-meta {
  font-size: 12px;
  color: var(--text-muted);
}

.stat-card .stat-meta.up   { color: var(--success); }
.stat-card .stat-meta.down { color: var(--danger); }

/* ── Table ─────────────────────────────────────────────────── */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  background: var(--bg-card);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

thead {
  background: var(--bg-muted);
}

thead th {
  padding: 10px 16px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--bg-border);
  white-space: nowrap;
}

tbody tr {
  border-bottom: 1px solid var(--bg-border);
  transition: background var(--transition);
}

tbody tr:last-child {
  border-bottom: none;
}

tbody tr:nth-child(even) {
  background: rgba(35, 105, 126, .018);
}

tbody tr:hover {
  background: var(--bg-hover);
}

tbody td {
  padding: 12px 16px;
  color: var(--text-secondary);
  vertical-align: middle;
}

tbody td:first-child {
  color: var(--text-primary);
  font-weight: 500;
}

/* Aliases used by practicante pages */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  background: var(--bg-card);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.table { width: 100%; border-collapse: collapse; font-size: 13px; }

/* Compact progress bar (used in dashboard tables) */
.progress-bar-wrap {
  height: 6px;
  background: var(--bg-border);
  border-radius: 99px;
  overflow: hidden;
  flex: 1;
  min-width: 60px;
}
.progress-bar-fill {
  height: 100%;
  border-radius: 99px;
  transition: width .4s ease;
}

/* ── Empty State ───────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 56px 24px;
}

.empty-state-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  opacity: 0.35;
}

.empty-state-title {
  font-family: 'Syne', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.empty-state-desc {
  font-size: 13px;
  color: var(--text-muted);
  max-width: 320px;
  margin: 0 auto 20px;
}

/* ── Modal ─────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 14, 40, .55);
  display: none;           /* hidden by default — JS adds .open */
  align-items: center;
  justify-content: center;
  z-index: 500;
  padding: 16px;
  backdrop-filter: blur(3px);
  animation: fadeOverlay .18s ease;
}

.modal-overlay.open {
  display: flex;
}

@keyframes fadeOverlay {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal-box {
  background: var(--bg-surface);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 28px;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
}

.modal-title {
  font-family: 'Syne', sans-serif;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: transparent;
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}

.modal-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.modal-footer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--bg-border);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

/* ── Stars Display ─────────────────────────────────────────── */
.stars-row {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  color: var(--star-color);
  font-size: 14px;
  line-height: 1;
}

.stars-row .star {
  display: inline-block;
  width: 14px;
  height: 14px;
  background: var(--star-color);
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}

.stars-row .star.empty {
  background: var(--bg-border);
}

.stars-row .star-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-left: 4px;
}

/* Inline star spans generated by estrellasHtml() */
.star-filled { color: var(--star-color); }
.star-empty  { color: var(--bg-border); }

/* ── Flash Banner — top alert bar ──────────────────────────── */
.flash-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 600;
  padding: 10px 24px;
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: var(--shadow);
  animation: bannerSlideDown 0.2s ease;
  border: none;
  border-radius: 0;
}

@keyframes bannerSlideDown {
  from { transform: translateY(-100%); opacity: 0; }
  to   { transform: translateY(0);     opacity: 1; }
}

.flash-banner.alert-success {
  background: var(--success);
  color: var(--text-inverse);
}

.flash-banner.alert-error {
  background: var(--danger);
  color: var(--text-inverse);
}

.flash-banner.alert-warning {
  background: var(--warning);
  color: var(--text-inverse);
}

.flash-banner.alert-info {
  background: var(--accent);
  color: var(--text-inverse);
}

/* Legacy toast-style flash (positioned top-right) */
.flash-message {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 600;
  min-width: 260px;
  max-width: 400px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  border: 1px solid transparent;
  border-left-width: 4px;
  background: var(--bg-surface);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: flex-start;
  gap: 8px;
  animation: slideIn 0.2s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(16px); }
  to   { opacity: 1; transform: translateX(0); }
}

.flash-message.flash-error {
  border-color: var(--bg-border);
  border-left-color: var(--danger);
  color: var(--text-primary);
}

.flash-message.flash-success {
  border-color: var(--bg-border);
  border-left-color: var(--success);
  color: var(--text-primary);
}

.flash-message.flash-warning {
  border-color: var(--bg-border);
  border-left-color: var(--warning);
  color: var(--text-primary);
}

.flash-message.flash-info {
  border-color: var(--bg-border);
  border-left-color: var(--accent);
  color: var(--text-primary);
}

/* ── Courses Grid ──────────────────────────────────────────── */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

/* ── Course Card ───────────────────────────────────────────── */
.course-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
  color: inherit;
}

.course-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  text-decoration: none;
  color: inherit;
}

/* Card header: colored banner with subtle pattern */
.course-card-header {
  height: 110px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background-color: var(--color, var(--accent));
}

/* Subtle geometric pattern overlay */
.course-card-header::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(255,255,255,.12) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,.08) 0%, transparent 50%),
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 12px,
      rgba(255,255,255,.03) 12px,
      rgba(255,255,255,.03) 13px
    );
  pointer-events: none;
}

.course-card-header-icon {
  position: relative;
  z-index: 1;
  color: rgba(255,255,255,.85);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.course-card-body {
  padding: 18px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.course-card-name {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.35;
}

.course-card-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.course-card-footer {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--bg-border);
}

/* ── Course card initial letter ────────────────────────────── */
.course-initial {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 48px;
  color: rgba(255,255,255,.9);
  line-height: 1;
  user-select: none;
  position: relative;
  z-index: 1;
}

/* ── Badge extra variants ───────────────────────────────────── */
.badge-info    { background: var(--accent-light); color: var(--info-text); }
.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }

/* ── Module list (curso.php) ────────────────────────────────── */
.module-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.module-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: inherit;
  transition: box-shadow .15s, border-color .15s, transform .15s;
  cursor: pointer;
}

a.module-item:hover {
  box-shadow: var(--shadow);
  border-color: var(--accent-border);
  transform: translateX(3px);
  text-decoration: none;
  color: inherit;
}

.module-item.locked {
  opacity: .55;
  cursor: not-allowed;
}

.module-item.completed {
  border-color: rgba(45,202,115,.3);
  background: rgba(45,202,115,.03);
}

.module-number {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.module-info { flex: 1; min-width: 0; }

.module-title {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.module-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
}

.module-status { flex-shrink: 0; }

/* ── Extra spacing utilities ────────────────────────────────── */
.mb-28  { margin-bottom: 28px; }
.mt-6   { margin-top: 6px; }
.gap-6  { gap: 6px; }

/* ── Login Page ────────────────────────────────────────────── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-page);
  padding: 24px;
}

.login-box {
  width: 100%;
  max-width: 400px;
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo .brand-name {
  font-family: 'Syne', sans-serif;
  font-size: 1.625rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.login-logo .brand-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.login-card {
  background: var(--bg-surface);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
}

.login-title {
  font-family: 'Syne', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.login-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.login-footer-text {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 20px;
}

/* ── Step Progress ─────────────────────────────────────────── */
.step-progress {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 28px;
}

.step-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  position: relative;
}

.step-item:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 15px;
  left: 50%;
  right: -50%;
  height: 2px;
  background: var(--bg-border);
  z-index: 0;
}

.step-item.done:not(:last-child)::after {
  background: var(--accent);
}

.step-dot {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--bg-muted);
  border: 2px solid var(--bg-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  z-index: 1;
  position: relative;
  transition: background var(--transition), border-color var(--transition);
}

.step-item.done .step-dot {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--text-inverse);
}

.step-item.active .step-dot {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

.step-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
  text-align: center;
  line-height: 1.3;
}

.step-item.done .step-label,
.step-item.active .step-label {
  color: var(--text-secondary);
}

/* ── User Avatar (shared component) ───────────────────────── */
.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
  user-select: none;
  text-transform: uppercase;
}

.user-avatar.sm {
  width: 28px;
  height: 28px;
  font-size: 11px;
}

.user-avatar.lg {
  width: 44px;
  height: 44px;
  font-size: 16px;
}

/* ── Utilities ─────────────────────────────────────────────── */

/* Display */
.flex        { display: flex; }
.flex-col    { display: flex; flex-direction: column; }
.flex-1      { flex: 1; }
.flex-wrap   { flex-wrap: wrap; }
.grid        { display: grid; }
.hidden      { display: none; }
.block       { display: block; }

/* Alignment */
.items-center    { align-items: center; }
.items-start     { align-items: flex-start; }
.items-end       { align-items: flex-end; }
.justify-center  { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end     { justify-content: flex-end; }

/* Gaps */
.gap-4  { gap: 4px; }
.gap-6  { gap: 6px; }
.gap-8  { gap: 8px; }
.gap-10 { gap: 10px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-20 { gap: 20px; }
.gap-24 { gap: 24px; }

/* Margin bottom */
.mb-4  { margin-bottom: 4px; }
.mb-8  { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }
.mb-20 { margin-bottom: 20px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }

/* Margin top */
.mt-4  { margin-top: 4px; }
.mt-8  { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-20 { margin-top: 20px; }
.mt-24 { margin-top: 24px; }

/* Text alignment */
.text-center { text-align: center; }
.text-right  { text-align: right; }
.text-left   { text-align: left; }

/* Text color */
.text-muted     { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-primary   { color: var(--text-primary); }
.text-accent    { color: var(--accent); }
.text-success   { color: var(--success); }
.text-danger    { color: var(--danger); }
.text-warning   { color: var(--warning); }

/* Font size */
.text-sm { font-size: 12px; }
.text-xs { font-size: 11px; }

/* Font weight */
.font-normal   { font-weight: 400; }
.font-medium   { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold     { font-weight: 700; }

/* Width */
.w-full { width: 100%; }

/* Truncate */
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .courses-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }
}

@media (max-width: 768px) {
  h1 { font-size: 1.4rem; }
  h2 { font-size: 1.2rem; }
  .page-title { font-size: 18px; }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .courses-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 14px;
  }

  .table-wrapper { border-radius: var(--radius-sm); }
  table         { font-size: 13px; }
  thead th, tbody td { padding: 10px 12px; }

  .modal-overlay { padding: 12px; }
  .modal-box {
    padding: 24px 20px;
    border-radius: var(--radius);
    max-height: 95vh;
  }

  .page-header { flex-direction: column; align-items: flex-start; gap: 8px; }

  .step-label { display: none; }
  .step-circle { width: 28px; height: 28px; font-size: 11px; }

  .btn-lg { padding: 10px 18px; font-size: 14px; }
  .btn-block-mobile { width: 100%; justify-content: center; }

  .hide-mobile { display: none !important; }
}

@media (max-width: 640px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  .stat-card { padding: 14px; }
  .stat-value { font-size: 24px; }

  .courses-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .course-card-header { height: 80px; }
  .course-initial { font-size: 28px; }
  .course-card-body { padding: 12px 14px; }
  .course-card-name { font-size: 13px; }
}

@media (max-width: 480px) {
  .courses-grid { grid-template-columns: 1fr; }
  .stats-grid   { grid-template-columns: 1fr 1fr; }

  .card { padding: 16px; }

  .modal-box { padding: 20px 16px; }

  .flex-col-mobile { flex-direction: column !important; }
  .gap-col-mobile  { gap: 8px !important; }

  .btn { padding: 8px 14px; font-size: 13px; }
}

/* ══════════════════════════════════════════════════════════════
   MODERN ENHANCEMENTS v2 — animations, depth, polish
   ══════════════════════════════════════════════════════════════ */

/* Page entry animation */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.page-content > * {
  animation: fadeUp .38s cubic-bezier(.22,1,.36,1) both;
}
.page-content > *:nth-child(1) { animation-delay: .04s; }
.page-content > *:nth-child(2) { animation-delay: .08s; }
.page-content > *:nth-child(3) { animation-delay: .13s; }
.page-content > *:nth-child(4) { animation-delay: .18s; }
.page-content > *:nth-child(5) { animation-delay: .22s; }

/* Card depth on hover */
.card {
  transition: box-shadow .22s ease, transform .22s ease, border-color .22s ease;
}
.card:hover {
  box-shadow: 0 8px 32px rgba(26,31,54,.09);
}

/* Stat card micro-lift */
.stat-card {
  transition: box-shadow .2s, transform .2s, border-color .2s;
}
.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(26,31,54,.10);
  border-color: var(--accent-border);
}

/* Smooth nav transitions */
.nav-item {
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}

/* Better button feedback */
.btn {
  transition: background .15s ease, box-shadow .15s ease, transform .1s ease, border-color .15s ease, color .15s ease;
}
.btn:active {
  transform: scale(.96);
}
.btn-primary:hover {
  box-shadow: 0 4px 18px rgba(35, 105, 126,.30);
}
.btn-success:hover {
  box-shadow: 0 4px 18px rgba(46,139,87,.30);
}

/* Module item hover accent */
a.module-item:hover {
  box-shadow: 0 4px 16px rgba(35, 105, 126,.10);
}

/* Chart container */
.chart-container {
  position: relative;
  width: 100%;
}

/* Glass card variant */
.card-glass {
  background: rgba(255,255,255,.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.5);
  box-shadow: 0 4px 24px rgba(17,34,30,.08);
}

/* Gradient hero card */
.hero-gradient {
  background: linear-gradient(135deg, #0F1A20 0%, #1A3A44 58%, #23697E 100%);
  color: #fff;
  border: none;
}

/* Pulse badge for active/online indicators */
@keyframes pulse-ring {
  0%   { transform: scale(1); opacity: .6; }
  100% { transform: scale(1.8); opacity: 0; }
}
.badge-pulse {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.badge-pulse::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: currentColor;
  animation: pulse-ring 1.8s ease infinite;
  pointer-events: none;
}

/* Skeleton loading */
@keyframes shimmer {
  from { background-position: -400px 0; }
  to   { background-position: 400px 0; }
}
.skeleton {
  background: linear-gradient(90deg, var(--bg-border) 25%, var(--bg-hover) 50%, var(--bg-border) 75%);
  background-size: 800px 100%;
  animation: shimmer 1.6s ease infinite;
  border-radius: var(--radius-sm);
}

/* Alpine.js transitions */
.transition { transition-property: all; }
.ease-out   { transition-timing-function: cubic-bezier(0,0,.2,1); }
.ease-in    { transition-timing-function: cubic-bezier(.4,0,1,1); }
.duration-150 { transition-duration: 150ms; }
.duration-100 { transition-duration: 100ms; }
.scale-95   { transform: scale(.95); }
.scale-100  { transform: scale(1); }
.opacity-0  { opacity: 0; }
.opacity-100{ opacity: 1; }
[x-cloak]   { display: none !important; }

/* Etiqueta de curso: icono + nombre en una sola línea. Sueltos dentro
   de una celda estrecha, el nombre se iba debajo del icono. */
.chip-curso {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
}

/* Topbar user button.
   La maqueta vive aquí y no en el atributo style: si Alpine no llega a
   cargar, el botón sigue siendo una fila y no un botón gris del navegador. */
.topbar-user-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 8px;
  transition: background .15s;
}
.topbar-user-btn:hover {
  background: var(--bg-hover) !important;
}

/* ── TTS Wave Animation ─────────────────────────────────── */
@keyframes wave {
  0%, 100% { transform: scaleY(1); }
  50%       { transform: scaleY(1.8); }
}

/* ── Historia reading card enhancements ──────────────────── */
#historia-texto p { margin-bottom: 14px; }
#historia-texto p:last-child { margin-bottom: 0; }

/* ══════════════════════════════════════════════════════════════
   VISUAL POLISH v3 — buttons, inputs, cards, mobile
   ══════════════════════════════════════════════════════════════ */

/* Premium button gradients */
.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  box-shadow: 0 2px 8px rgba(35, 105, 126,.25);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent) 100%);
  box-shadow: 0 4px 16px rgba(35, 105, 126,.35);
  transform: translateY(-1px);
}
.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, var(--success-text) 100%);
  box-shadow: 0 2px 8px rgba(46,139,87,.20);
}
.btn-success:hover {
  box-shadow: 0 4px 16px rgba(46,139,87,.30);
  transform: translateY(-1px);
}

/* Stat card icon — square variant (used in some pages) */
.stat-icon-sq {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.stat-icon-sq.blue   { background: var(--accent-light);   color: var(--accent); }
.stat-icon-sq.green  { background: var(--success-light);  color: var(--success); }
.stat-icon-sq.red    { background: var(--danger-light);   color: var(--danger); }
.stat-icon-sq.amber  { background: var(--warning-light);  color: var(--warning); }
.stat-icon-sq.purple { background: rgba(124,107,176,.14); color: var(--purple); }

/* Smooth scrollbar (desktop) */
* { scrollbar-width: thin; scrollbar-color: var(--bg-border) transparent; }
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-border); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: #B7C4BC; }

/* Focus ring — accessible + modern */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Better form control height */
.form-control { height: 40px; }
textarea.form-control { height: auto; min-height: 96px; }
select.form-control { height: 40px; }

/* Inline form row */
.form-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.form-row .form-group { flex: 1; min-width: 180px; }

/* Page header row */
.page-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

/* Divider */
.divider {
  height: 1px;
  background: var(--bg-border);
  margin: 20px 0;
}

/* Pill tag (used in module/course labels) */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .03em;
  white-space: nowrap;
}

/* Icon button */
.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--bg-border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}
.btn-icon:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* ── Mobile first: key breakpoints ─────────────────────────── */
@media (max-width: 768px) {
  /* Reduce page heading size */
  .page-title { font-size: 17px; }
  h1          { font-size: 1.35rem; }
  h2          { font-size: 1.15rem; }

  /* Stat grid: 2 columns on tablet */
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }

  /* Course cards: 2 columns on tablet */
  .courses-grid { grid-template-columns: 1fr 1fr; gap: 14px; }

  /* Forms: full width on small screens */
  .form-row { flex-direction: column; gap: 0; }

  /* Page header row: stack on mobile */
  .page-header-row { flex-direction: column; align-items: flex-start; }

  /* Module item: compact on mobile */
  .module-item { padding: 12px 16px; gap: 12px; }
  .module-title { font-size: 13px; }

  /* Table: tighter padding */
  thead th, tbody td { padding: 9px 12px; }

  /* Hide secondary table columns */
  .hide-mobile { display: none !important; }

  /* Card padding reduction */
  .card { padding: 18px; }

  /* Reduce modal padding */
  .modal-box { padding: 24px 18px; }

  /* Button sizes on mobile */
  .btn { font-size: 13px; }
  .btn-lg { padding: 11px 20px; font-size: 13px; }
}

@media (max-width: 640px) {
  /* Courses: 1 column on phone */
  .courses-grid { grid-template-columns: 1fr; gap: 12px; }

  /* Stats: always 2-col on phone */
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat-card { padding: 14px; }
  .stat-card .stat-value { font-size: 1.5rem; }

  /* Course card compact */
  .course-card-header { height: 90px; }
  .course-initial     { font-size: 32px; }
  .course-card-body   { padding: 14px; }
  .course-card-name   { font-size: 13px; }

  /* Card padding compact */
  .card { padding: 16px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .modal-box  { padding: 20px 14px; }
  .btn-block-mobile { width: 100%; justify-content: center; display: flex; }
  .flex-col-mobile  { flex-direction: column !important; }
}

/* ── Print utilities ────────────────────────────────────────── */
@media print {
  .no-print, .topbar, .sidebar, #sidebar-overlay { display: none !important; }
  .main-content { margin-left: 0 !important; }
  .page-content { padding: 0 !important; max-width: none !important; }
  .card { box-shadow: none !important; border: 1px solid #DCE1D9 !important; }
}

/* ── table-wrap alias — fully styled (matches table-wrapper) ── */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  background: var(--bg-card);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

/* ── Empty-icon (used in practicante / admin_colegio) ────────── */
.empty-icon {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 12px;
  color: var(--text-muted);
  opacity: 0.4;
}

/* ── Page action header — title left, CTA right ──────────────── */
/* Use <div class="page-action-header"> instead of inline flex   */
.page-action-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.page-action-header .page-title   { margin-bottom: 4px; }
.page-action-header .page-subtitle { margin-top: 4px; }

/* ── Responsive 2-column charts row ─────────────────────────── */
.charts-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

/* ── Course hero inner layout ────────────────────────────────── */
.course-hero-inner {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* ── Aulas / modules grid ────────────────────────────────────── */
.aulas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

/* ── Stat icon Lucide size normalization ─────────────────────── */
.stat-icon [data-lucide],
.stat-icon svg {
  width: 20px;
  height: 20px;
}

/* ── Responsive overrides ────────────────────────────────────── */
@media (max-width: 768px) {
  .charts-row { grid-template-columns: 1fr; gap: 16px; }
  .aulas-grid { grid-template-columns: 1fr; }
  .module-title { white-space: normal; }
}

@media (max-width: 640px) {
  .page-action-header { flex-direction: column; }
  .page-action-header > .btn,
  .page-action-header > a.btn { width: 100%; justify-content: center; }

  .course-hero-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }
  .course-hero-inner > div:first-child {
    /* the color square */
    width: 56px !important;
    height: 56px !important;
    font-size: 28px !important;
  }

  .aulas-grid { grid-template-columns: 1fr; }
}

/* ── Sidebar+content two-column layout ───────────────────────── */
.sidebar-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  align-items: start;
}

@media (max-width: 768px) {
  .sidebar-layout { grid-template-columns: 1fr; }
}

/* ── Form 2-col grid (stacks on mobile) ─────────────────────── */
.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

@media (max-width: 640px) {
  .form-row-2 { grid-template-columns: 1fr; }
}

/* ============================================================
   DARK MODE — overrides CSS tokens for html[data-theme="dark"]
   ============================================================ */
html[data-theme="dark"] {
  /* Backgrounds */
  --bg-page:     #0B1310;
  --bg-surface:  #111C17;
  --bg-card:     #16231D;
  --bg-input:    #111C17;
  --bg-muted:    #111C17;
  --bg-border:   #24332B;
  --bg-hover:    #1C2A23;
  --bg-elevated: #1C2A23;
  --bg-card-alt: #1C2A23;
  --success-text: #8FD4AA;
  --danger-text:  #EFA098;
  --warning-text: #E2BC8A;
  --info-text:    #8ACEE2;

  /* Text */
  --text-primary:   #E6EDE7;
  --text-secondary: #B7C4BC;
  --text-muted:     #8B998F;
  --text-inverse:   #0B1310;

  /* Accent — slightly brighter for dark bg */
  --accent:        #6FBDD4;
  --accent-hover:  #8ACEE2;
  --accent-light:  rgba(111, 189, 212, .15);
  --accent-border: rgba(111, 189, 212, .35);

  /* Status */
  --success:       #6FC291;
  --success-light: rgba(111, 194, 145, .15);
  --danger:        #E0796F;
  --danger-light:  rgba(224, 121, 111, .15);
  --warning:       #D3A063;
  --warning-light: rgba(211, 160, 99, .15);
  --info:          #6FBDD4;
  --info-light:    rgba(111, 189, 212, .15);

  /* Extended palette */
  --blue:   #6FAEDC;
  --green:  #6FC291;
  --purple: #AFA0DC;
  --coral:  #E0906F;
  --gold:   #DFB765;
  --teal:   #6FBDD4;

  /* Shadows — more prominent on dark */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, .40), 0 1px 2px rgba(0, 0, 0, .30);
  --shadow:    0 4px 16px rgba(0, 0, 0, .50);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, .60);
}

/* Smooth background + text transition on theme switch */
body,
.card, .stat-card, .topbar,
.table-wrapper, .table-wrap,
.sidebar, .main-content {
  transition: background-color .25s ease, border-color .2s ease, color .2s ease;
}

/* ── Theme toggle icon visibility ──────────────────────────── */
/* Moon shown in light mode (click → switch to dark)  */
/* Sun  shown in dark mode  (click → switch to light) */
html[data-theme="dark"] .theme-icon-moon { display: none !important; }
html[data-theme="dark"] .theme-icon-sun  { display: block !important; }
html:not([data-theme="dark"]) .theme-icon-sun  { display: none !important; }
html:not([data-theme="dark"]) .theme-icon-moon { display: block !important; }

/* ============================================================
   STELLAR v4.1 — Extended components
   ============================================================ */

/* ── Stat trend badge ──────────────────────────────────────── */
.stat-trend {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 99px;
  margin-top: 6px;
}
.stat-trend.up   { background: var(--success-light); color: var(--success); }
.stat-trend.down { background: var(--danger-light);  color: var(--danger); }
.stat-trend.flat { background: var(--bg-muted);      color: var(--text-muted); }
.stat-trend svg  { width: 10px; height: 10px; flex-shrink: 0; }

/* ── Welcome banner ────────────────────────────────────────── */
.welcome-banner {
  background: linear-gradient(135deg, #0F1A20 0%, #1A3A44 58%, #23697E 100%);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  position: relative;
  overflow: hidden;
}
.welcome-banner::before {
  content: '';
  position: absolute;
  top: -30px; right: -30px;
  width: 160px; height: 160px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
  pointer-events: none;
}
.welcome-banner::after {
  content: '';
  position: absolute;
  bottom: -50px; right: 80px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: rgba(255,255,255,.04);
  pointer-events: none;
}
.welcome-text { position: relative; z-index: 1; }
.welcome-title {
  font-family: 'Syne', sans-serif;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}
.welcome-sub { font-size: 13px; color: rgba(255,255,255,.75); }
.welcome-action { position: relative; z-index: 1; flex-shrink: 0; }
.welcome-action .btn {
  background: rgba(255,255,255,.15);
  border-color: rgba(255,255,255,.3);
  color: #fff;
  backdrop-filter: blur(4px);
}
.welcome-action .btn:hover {
  background: rgba(255,255,255,.25);
}

/* ── Stats grid 6-col ──────────────────────────────────────── */
.stats-grid-6 {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}
@media (max-width: 1100px) { .stats-grid-6 { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px)  { .stats-grid-6 { grid-template-columns: repeat(2, 1fr); } }

/* ── Activity feed ─────────────────────────────────────────── */
.activity-feed { display: flex; flex-direction: column; }
.activity-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--bg-border);
}
.activity-item:last-child { border-bottom: none; }
.activity-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}
.activity-dot svg, .activity-dot i { width: 14px; height: 14px; }
.activity-text { flex: 1; min-width: 0; }
.activity-title { font-size: 13px; font-weight: 600; color: var(--text-primary); line-height: 1.4; }
.activity-meta  { font-size: 11px; color: var(--text-muted); margin-top: 2px; }
.activity-time  { font-size: 11px; color: var(--text-muted); white-space: nowrap; flex-shrink: 0; }

/* ── Aula card ─────────────────────────────────────────────── */
.aula-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-lg);
  padding: 22px;
  transition: box-shadow .2s, border-color .2s, transform .2s;
}
.aula-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--accent-border);
  transform: translateY(-2px);
}
.aula-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 8px;
}
.aula-card-title {
  font-family: 'Syne', sans-serif;
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
}
.aula-card-sub { font-size: 12px; color: var(--text-muted); margin-top: 3px; }
.aula-card-stats {
  display: flex;
  gap: 16px;
  margin-bottom: 14px;
}
.aula-card-stat { text-align: center; }
.aula-card-stat-val { font-family: 'Syne', sans-serif; font-size: 20px; font-weight: 800; line-height: 1; }
.aula-card-stat-lbl { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; margin-top: 2px; }

/* ── Progress ring (SVG-based, CSS-driven) ─────────────────── */
.progress-ring { position: relative; display: inline-flex; align-items: center; justify-content: center; }
.progress-ring-label {
  position: absolute;
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 800;
  color: var(--text-primary);
}

/* ── Chart skeleton / loading ──────────────────────────────── */
.chart-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 100%;
  color: var(--text-muted);
  font-size: 13px;
}
.chart-loading::before {
  content: '';
  width: 16px;
  height: 16px;
  border: 2px solid var(--bg-border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Number counter animation ──────────────────────────────── */
.stat-value[data-count] { transition: none; }

/* ── Aulas grid 3-col ──────────────────────────────────────── */
.aulas-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
@media (max-width: 900px) { .aulas-grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 580px) { .aulas-grid-3 { grid-template-columns: 1fr; } }

/* ── Inline metric pair ────────────────────────────────────── */
.metric-pair { display: flex; gap: 20px; }
.metric-item { }
.metric-val { font-family: 'Syne',sans-serif; font-size: 22px; font-weight: 800; line-height: 1; }
.metric-lbl { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; margin-top: 2px; }