/* ============================================================
   AcadexIA — Shared UI System
   Tokens y componentes comunes a todas las verticales.
============================================================ */

/* ── Tipografía ─────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ── Reset base ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
body {
  font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  background: var(--bg-base);
  min-height: 100vh;
  color: var(--text-primary);
  margin: 0;
  padding: 0;
}

/* ── Tokens compartidos ──────────────────────────────────────── */
:root {
  --primary:        #0066CC;
  --primary-light:  #4A9EFF;
  --primary-dark:   #003D7A;
  --accent:         #00C896;
  --accent-dark:    #00A07A;

  --bg-base:        #f5f9ff;
  --bg-surface:     #ffffff;
  --bg-surface-2:   #f8fafd;
  --bg-surface-3:   #eef4fb;

  --text-primary:   #1a2332;
  --text-secondary: #374151;
  --text-muted:     #6b7a8d;

  --border-color:   #e2eaf4;
  --shadow:         0 4px 24px rgba(0,102,204,.10);
  --shadow-lg:      0 8px 40px rgba(0,102,204,.18);

  --bg-light:       var(--bg-base);
  --text-dark:      var(--text-primary);
  --border:         var(--border-color);

  --radius-card:    16px;
  --radius-btn:     12px;
  --radius-input:   12px;
  --radius-badge:   9999px;
  --radius-nav:     8px;
}

/* ── Dark mode ───────────────────────────────────────────────── */
html.dark {
  --bg-base:        #0f172a;
  --bg-surface:     #1e293b;
  --bg-surface-2:   #263347;
  --bg-surface-3:   #2d3d52;
  --text-primary:   #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted:     #64748b;
  --border-color:   #334155;
  --shadow:         0 4px 24px rgba(0,0,0,.35);
  --shadow-lg:      0 8px 40px rgba(0,0,0,.50);
  --bg-light:       var(--bg-base);
  --text-dark:      var(--text-primary);
  --border:         var(--border-color);
}

html.dark .sidebar { background: var(--bg-surface); border-right-color: var(--border-color); }
html.dark .sidebar-logo { border-bottom-color: var(--border-color); }
html.dark .sidebar-logo-icon { background: rgba(74,158,255,.15); color: var(--primary-light); }
html.dark .sidebar-logo-text strong { color: var(--text-primary); }
html.dark .sidebar-logo-text span { color: var(--text-muted); }
html.dark .nav-item-btn { color: var(--text-secondary); }
html.dark .nav-item-btn i { color: var(--text-muted); }
html.dark .nav-item-btn:hover { background: var(--bg-surface-3); color: var(--primary-light); }
html.dark .nav-item-btn:hover i { color: var(--primary-light); }
html.dark .nav-item-btn.active { background: rgba(74,158,255,.15); color: var(--primary-light); }
html.dark .nav-item-btn.active i { color: var(--primary-light); }
html.dark [style*="background:white"],
html.dark [style*="background: white"] { background: var(--bg-surface) !important; }
html.dark [style*="background:#f0f7ff"],
html.dark [style*="background:#f0f4ff"],
html.dark [style*="background:#f8f9fa"] { background: var(--bg-surface-2) !important; }
html.dark .table thead th { background: var(--bg-surface-2); color: var(--text-primary); border-color: var(--border-color); }
html.dark .table tbody td { color: var(--text-secondary); border-color: var(--border-color); }
html.dark .table-hover tbody tr:hover { background: var(--bg-surface-3); }
html.dark .modal-content { background: var(--bg-surface); color: var(--text-primary); border-color: var(--border-color); }
html.dark .modal-body { background: var(--bg-surface); }
html.dark .modal-footer { background: var(--bg-surface); border-color: var(--border-color); }
html.dark .form-control,
html.dark .form-select { background: var(--bg-surface-2); color: var(--text-primary); border-color: var(--border-color); }
html.dark .form-control:focus,
html.dark .form-select:focus { background: var(--bg-surface-2); color: var(--text-primary); }
html.dark .form-control::placeholder { color: var(--text-muted); }
html.dark .alert { background: var(--bg-surface-2) !important; border-color: var(--border-color) !important; color: var(--text-secondary) !important; }
html.dark code { background: var(--bg-surface-3); color: var(--primary-light); padding: 1px 5px; border-radius: 4px; }
html.dark .card { background: var(--bg-surface); border-color: var(--border-color); color: var(--text-primary); }
html.dark .card-header { background: var(--bg-surface-2); border-color: var(--border-color); }

/* ══════════════════════════════════════════════════════════════
   APP SHELL — Sidebar + Header layout
══════════════════════════════════════════════════════════════ */
html, body { height: 100%; margin: 0; }

.app-shell {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Legacy alias */
.app-container { display: flex; min-height: 100vh; }

/* ── Sidebar ─────────────────────────────────────────────────── */
.sidebar {
  width: 240px;
  min-width: 240px;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width .2s ease, min-width .2s ease;
  z-index: 200;
  flex-shrink: 0;
  height: 100vh;
  position: fixed;
  top: 0; left: 0;
}

.sidebar.collapsed { width: 64px; min-width: 64px; }

/* Logo block */
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 16px;
  border-bottom: 1px solid var(--border-color);
  min-height: 64px;
  overflow: hidden;
}

.sidebar-logo-icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: rgba(0,102,204,.12);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  font-size: 1rem;
  flex-shrink: 0;
}

.sidebar-logo-text {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  white-space: nowrap;
}

.sidebar-logo-text strong { color: var(--text-primary); font-size: .95rem; font-weight: 800; line-height: 1.2; }
.sidebar-logo-text span   { color: var(--text-muted); font-size: .72rem; }
.sidebar.collapsed .sidebar-logo-text { display: none; }

/* Nav */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }

.nav-section-header {
  padding: 10px 12px 6px;
  color: white;
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 12px;
  padding-top: 10px;
  background: rgba(0,102,204,.55);
  border-radius: 6px;
  padding: 6px 10px;
  margin-bottom: 2px;
}
/* First section header doesn't need extra top margin */
.sidebar-nav > .nav-section-header:first-child {
  margin-top: 0;
}

.sidebar.collapsed .nav-section-header { display: none; }

.nav-item-btn, .nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: .88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
  overflow: hidden;
  width: 100%;
  text-align: left;
  text-decoration: none;
}

.nav-item-btn i, .nav-item i {
  font-size: 1rem;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
  color: var(--text-muted);
}

.nav-item-btn:hover, .nav-item:hover {
  background: var(--bg-surface-3);
  color: var(--primary);
}

.nav-item-btn:hover i, .nav-item:hover i { color: var(--primary); }

.nav-item-btn.active, .nav-item.active {
  background: rgba(0,102,204,.1);
  color: var(--primary);
  font-weight: 700;
}

.nav-item-btn.active i, .nav-item.active i { color: var(--primary); }
.nav-item-label { overflow: hidden; }
.sidebar.collapsed .nav-item-label { display: none; }

/* Sidebar overlay mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 199;
}

/* ── App main area ───────────────────────────────────────────── */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  margin-left: 240px;
  transition: margin-left .2s ease;
}

.sidebar.collapsed ~ .app-main,
.sidebar.collapsed + .app-main { margin-left: 64px; }

/* Legacy main-content */
.main-content {
  flex: 1;
  margin-left: 240px;
  background: var(--bg-base);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Top header ──────────────────────────────────────────────── */
.app-header, .topbar {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: white;
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 12px;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,.15);
  z-index: 100;
}

.app-header h2, .topbar h2 {
  flex: 1;
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
  color: white;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-header-hamburger {
  background: transparent;
  border: none;
  color: white;
  font-size: 1.1rem;
  cursor: pointer;
  padding: 6px 8px;
  border-radius: 8px;
  transition: background .15s;
  flex-shrink: 0;
}

.app-header-hamburger:hover { background: rgba(255,255,255,.15); }

.app-header-controls, .topbar-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.header-btn {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  color: white;
  border-radius: 8px;
  padding: 5px 10px;
  font-size: .8rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
  line-height: 1.4;
}

.header-btn:hover { background: rgba(255,255,255,.25); }
.header-btn.active { background: rgba(255,255,255,.3); }

.header-avatar, .user-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,.25);
  border: 2px solid rgba(255,255,255,.4);
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem;
  font-weight: 700;
  color: white;
  cursor: pointer;
  flex-shrink: 0;
}

/* Search box in topbar */
.search-box { position: relative; }
.search-box input {
  padding: .4rem 1rem .4rem 2.2rem;
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 20px;
  background: rgba(255,255,255,.15);
  color: white;
  width: 220px;
  font-size: .85rem;
}
.search-box input::placeholder { color: rgba(255,255,255,.6); }
.search-box input:focus { outline: none; background: rgba(255,255,255,.25); }
.search-box i { position: absolute; left: .75rem; top: 50%; transform: translateY(-50%); color: rgba(255,255,255,.7); }

/* ── Content area ────────────────────────────────────────────── */
.app-content, .content-area {
  flex: 1;
  overflow-y: auto;
  background: var(--bg-base);
  padding: 24px;
}

/* ── Cards ───────────────────────────────────────────────────── */
.card {
  background: var(--bg-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.card-header {
  background: var(--bg-surface-2);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-card) var(--radius-card) 0 0;
}

.card-header h5, .card-header h6 { margin: 0; font-weight: 700; color: var(--text-primary); }
.card-body { padding: 1.5rem; }

.admin-card {
  background: var(--bg-surface);
  border-radius: var(--radius-card);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
  border: 1px solid var(--border-color);
}

.config-card { border-left: 4px solid var(--primary); }

/* ── Tab page header ─────────────────────────────────────────── */
.tab-page-header {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: white;
  padding: 18px 24px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.tab-page-header h5 { margin: 0; font-size: 1.15rem; font-weight: 700; color: white; }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn-primary, .btn-primary-ui {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: all .2s;
}

.btn-primary:hover, .btn-primary-ui:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,102,204,.3);
}

.btn-secondary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  font-weight: 600;
  border-radius: var(--radius-btn);
}

.btn-secondary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: white;
}

.btn-success { background: var(--accent); border-color: var(--accent); }
.btn-success:hover { background: var(--accent-dark); border-color: var(--accent-dark); }

.btn-outline-primary { color: var(--primary); border-color: var(--primary); border-radius: var(--radius-btn); }
.btn-outline-primary:hover { background: var(--primary); border-color: var(--primary); }

.btn-hero-primary {
  background: var(--accent);
  color: white;
  border: none;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all .25s;
  box-shadow: 0 4px 20px rgba(0,200,150,.4);
}

.btn-hero-primary:hover {
  background: var(--accent-dark);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,200,150,.5);
}

.btn-hero-secondary {
  background: rgba(255,255,255,.15);
  color: white;
  border: 2px solid rgba(255,255,255,.5);
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all .25s;
  backdrop-filter: blur(4px);
}

.btn-hero-secondary:hover { background: rgba(255,255,255,.25); color: white; transform: translateY(-2px); }

/* ── KPI / Stat Cards ────────────────────────────────────────── */
.kpi-card, .stat-card {
  background: var(--bg-surface);
  border-radius: var(--radius-card);
  padding: 24px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: all .25s;
}

.kpi-card:hover, .stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.kpi-value, .stat-value { font-size: 2.5rem; font-weight: 800; margin: 0; color: var(--text-primary); line-height: 1; }
.kpi-label, .stat-label { font-size: .9rem; color: var(--text-muted); margin: .5rem 0 0; font-weight: 500; }
.kpi-trend { font-size: .8rem; margin-top: .5rem; }
.trend-up { color: var(--accent-dark); }
.trend-down { color: #dc3545; }
.stat-icon { font-size: 1.8rem; margin-bottom: 8px; }

/* ── Status badges ───────────────────────────────────────────── */
.badge, .status-badge {
  padding: 4px 12px;
  border-radius: var(--radius-badge);
  font-size: .78rem;
  font-weight: 700;
  display: inline-block;
}

.badge-success, .status-confirmado, .status-activo { background: #d4edda; color: #155724; }
.badge-warning, .status-pendiente { background: #fff3cd; color: #856404; }
.badge-danger, .status-cancelado, .status-inactivo { background: #f8d7da; color: #721c24; }
.badge-primary { background: rgba(0,102,204,.15); color: var(--primary); }
.badge-info { background: rgba(74,158,255,.15); color: var(--primary-light); }

/* Bootstrap badge overrides */
.bg-success { background-color: var(--accent) !important; }
.bg-primary { background-color: var(--primary) !important; }
.bg-info    { background-color: var(--primary-light) !important; }

/* ── Tables ──────────────────────────────────────────────────── */
.table thead th {
  background: var(--bg-surface-2);
  color: var(--text-primary);
  font-weight: 700;
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .5px;
  border-bottom: 2px solid var(--border-color);
  padding: 12px 14px;
  border-top: none;
}

.table tbody td { padding: 12px 14px; vertical-align: middle; font-size: .9rem; color: var(--text-secondary); }
.table-hover tbody tr:hover { background: rgba(0,102,204,.04); }

/* ── Modals ──────────────────────────────────────────────────── */
.modal-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
}
.modal-header .btn-close { filter: brightness(0) invert(1); }
.modal-content { border-radius: var(--radius-card); border: 1px solid var(--border-color); }

/* ── Forms ───────────────────────────────────────────────────── */
.form-control, .form-select {
  border-radius: var(--radius-input);
  border: 1px solid var(--border-color);
  font-size: .9rem;
  padding: .65rem 1rem;
  transition: all .2s;
  background: var(--bg-surface);
  color: var(--text-primary);
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,102,204,.12);
  background: var(--bg-surface);
  color: var(--text-primary);
}

.form-label { color: var(--text-primary); font-weight: 500; margin-bottom: .5rem; }
.form-section { background: var(--bg-surface-2); padding: 18px; border-radius: 10px; margin-bottom: 18px; }
.form-section h6 { color: var(--primary); font-weight: 700; margin-bottom: 12px; }

.form-check-input:checked { background-color: var(--primary); border-color: var(--primary); }
.form-check-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,102,204,.12); }

/* ── Alerts ──────────────────────────────────────────────────── */
.alert { border-radius: 12px; border: none; padding: 1rem 1.5rem; }
.alert-success { background: rgba(0,200,150,.1); color: var(--accent-dark); border-left: 4px solid var(--accent); }
.alert-warning { background: rgba(241,194,27,.1); color: #856404; border-left: 4px solid #f1c21b; }
.alert-danger  { background: rgba(220,53,69,.1); color: #721c24; border-left: 4px solid #dc3545; }
.alert-info    { background: rgba(0,102,204,.08); color: var(--primary-dark); border-left: 4px solid var(--primary); }
.alert-primary { background: rgba(0,102,204,.08); color: var(--primary-dark); border-left: 4px solid var(--primary); }

/* ── Upload Zone ─────────────────────────────────────────────── */
.upload-zone {
  border: 2px dashed var(--primary);
  border-radius: var(--radius-card);
  padding: 3rem 2rem;
  text-align: center;
  background: rgba(0,102,204,.04);
  transition: all .3s ease;
  cursor: pointer;
}

.upload-zone:hover, .upload-zone.dragover, .upload-zone.drag-over {
  border-color: var(--accent);
  background: rgba(0,200,150,.08);
  transform: translateY(-2px);
}

.upload-icon { font-size: 3rem; color: var(--primary); margin-bottom: 1rem; }
.upload-text { color: var(--text-primary); font-size: 1.1rem; font-weight: 600; margin-bottom: .5rem; }
.upload-subtext { color: var(--text-muted); font-size: .9rem; }

/* ── Progress ────────────────────────────────────────────────── */
.progress { height: 10px; border-radius: 6px; background: var(--bg-surface-3); }
.progress-bar { border-radius: 6px; transition: width .6s ease; background: var(--primary); }
.progress-bar-success { background: var(--accent); }
.progress-bar-warning { background: #f1c21b; }
.progress-bar-danger  { background: #dc3545; }

/* ── Connection status ───────────────────────────────────────── */
.connection-status {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: var(--radius-badge);
  font-size: .85rem;
  font-weight: 600;
}
.connection-status.connected    { background: #d4edda; color: #155724; border: 2px solid #28a745; }
.connection-status.disconnected { background: #f8d7da; color: #721c24; border: 2px solid #dc3545; }

/* ── Loading overlay ─────────────────────────────────────────── */
.loading-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.65);
  z-index: 9999;
  justify-content: center;
  align-items: center;
}
.loading-spinner { text-align: center; color: white; }
.loading { opacity: .6; pointer-events: none; }

/* ── Config section header ───────────────────────────────────── */
.config-section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: linear-gradient(135deg, rgba(0,102,204,.08) 0%, rgba(0,102,204,.03) 100%);
  border-radius: 10px;
  margin-bottom: 20px;
  border-left: 4px solid var(--primary);
}
.config-section-header i { font-size: 1.2rem; color: var(--primary); }
.config-section-header h6 { margin: 0; font-weight: 700; color: var(--primary-dark); }

/* ── Landing sections ────────────────────────────────────────── */
.lp-section    { padding: 80px 0; }
.lp-section-sm { padding: 56px 0; }
.lp-container  { width: 100%; padding: 0 40px; }

.lp-hero {
  color: var(--text-primary);
  padding: 100px 0 80px;
  position: relative;
  overflow: hidden;
  background: var(--bg-base);
}

.lp-hero-title    { font-size: clamp(2rem,4vw,3.2rem); font-weight: 900; line-height: 1.15; margin-bottom: 20px; color: var(--text-primary); }
.lp-hero-subtitle { font-size: 1.15rem; color: var(--text-secondary); margin-bottom: 36px; max-width: 560px; line-height: 1.6; }
.lp-hero-ctas     { display: flex; gap: 14px; flex-wrap: wrap; }

.lp-hero-visual {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 24px;
  box-shadow: var(--shadow-lg);
}

.lp-section-title    { font-size: clamp(1.6rem,3vw,2.2rem); font-weight: 800; color: var(--text-primary); margin-bottom: 12px; }
.lp-section-subtitle { font-size: 1.05rem; color: var(--text-muted); margin-bottom: 48px; max-width: 600px; }

.lp-label {
  display: inline-block;
  background: rgba(0,102,204,.1);
  color: var(--primary);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: var(--radius-badge);
  margin-bottom: 14px;
}
.lp-label-green { background: rgba(0,200,150,.12); color: var(--accent-dark); }

/* Pain / Feature / Metric / Roadmap cards */
.pain-card, .feature-card {
  background: var(--bg-surface);
  border-radius: 14px;
  padding: 24px;
  border: 1px solid var(--border-color);
  transition: all .25s;
  height: 100%;
}
.pain-card:hover, .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.pain-icon { font-size: 2rem; margin-bottom: 14px; }
.pain-card h5, .feature-card h5 { font-weight: 700; font-size: 1rem; margin-bottom: 8px; color: var(--text-primary); }
.pain-card p, .feature-card p   { font-size: .9rem; color: var(--text-muted); margin: 0; }

.feature-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}
.feature-icon.blue   { background: rgba(0,102,204,.1);  color: var(--primary); }
.feature-icon.green  { background: rgba(0,200,150,.12); color: var(--accent-dark); }
.feature-icon.orange { background: rgba(255,152,0,.12); color: #e65100; }
.feature-icon.purple { background: rgba(103,58,183,.1); color: #673ab7; }

.metric-card {
  background: var(--bg-surface);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: all .25s;
  height: 100%;
}
.metric-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.metric-number { font-size: 2.8rem; font-weight: 900; line-height: 1; margin-bottom: 8px; }
.metric-label  { font-size: .9rem; color: var(--text-muted); font-weight: 500; }

.roadmap-card {
  background: var(--bg-surface);
  border-radius: 14px;
  padding: 28px;
  border: 1px solid var(--border-color);
  height: 100%;
  border-top: 4px solid var(--primary);
}
.roadmap-card.phase2 { border-top-color: var(--accent); }
.roadmap-card.phase3 { border-top-color: #673ab7; }
.roadmap-card h5 { font-weight: 700; margin-bottom: 16px; }
.roadmap-card ul { padding-left: 18px; margin: 0; }
.roadmap-card li { font-size: .9rem; color: var(--text-muted); margin-bottom: 8px; }

/* CTA section */
.lp-cta-section {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: white;
  padding: 80px 0;
}
.lp-cta-section .lp-section-title    { color: white; }
.lp-cta-section .lp-section-subtitle { color: rgba(255,255,255,.8); }

/* Contact form */
.contact-form {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--radius-card);
  padding: 32px;
  backdrop-filter: blur(8px);
}
.contact-form .form-control { background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.3); color: white; }
.contact-form .form-control::placeholder { color: rgba(255,255,255,.6); }
.contact-form .form-control:focus { background: rgba(255,255,255,.2); border-color: var(--accent); box-shadow: none; color: white; }
.contact-form label { color: rgba(255,255,255,.9); font-weight: 500; font-size: .9rem; }

/* Architecture flow */
.arch-flow { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 8px; margin: 32px 0; }
.arch-node {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  padding: 12px 18px;
  font-size: .85rem;
  font-weight: 600;
  text-align: center;
  min-width: 110px;
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
  color: var(--text-primary);
}
.arch-node.highlight       { background: var(--primary); color: white; border-color: var(--primary); }
.arch-node.highlight-green { background: var(--accent);  color: white; border-color: var(--accent); }
.arch-arrow { color: var(--primary-light); font-size: 1.2rem; }

/* Chat bubbles */
.chat-bubble-demo { margin-bottom: 12px; }
.chat-bubble-demo .bubble { display: inline-block; padding: 10px 16px; border-radius: 18px; font-size: .88rem; max-width: 85%; line-height: 1.4; }
.bubble-bot  { background: var(--bg-surface); color: var(--text-primary); border-bottom-left-radius: 4px; }
.bubble-user { background: var(--accent); color: white; border-bottom-right-radius: 4px; float: right; }
.chat-bubble-demo.user { text-align: right; }
.chat-bubble-demo::after { content: ''; display: table; clear: both; }

/* Channel badges */
.channel-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 8px 18px;
  font-size: .88rem; font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  transition: all .2s;
  margin: 4px;
}
.channel-badge:hover { transform: translateY(-2px); box-shadow: var(--shadow); color: var(--primary); }
.channel-badge.whatsapp { border-color: #25D366; color: #25D366; }
.channel-badge.whatsapp:hover { background: #25D366; color: white; }
.channel-badge.soon { opacity: .55; cursor: default; pointer-events: none; }

/* Diff items */
.diff-item  { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 16px; }
.diff-check { color: var(--accent); font-size: 1.1rem; margin-top: 2px; flex-shrink: 0; }

/* Fade-up animation */
.fade-up { opacity: 0; transform: translateY(30px); transition: opacity .6s ease, transform .6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* Footer */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,.7);
  padding: 32px 0;
  text-align: center;
  font-size: .88rem;
}

/* ── Exam Generator Specific ─────────────────────────────────── */
.step-circle {
  width: 50px; height: 50px;
  border-radius: 50%;
  background: var(--bg-surface-3);
  border: 2px solid var(--border-color);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  color: var(--text-muted);
  transition: all .3s ease;
  margin-bottom: .5rem;
}
.step-circle.active    { background: var(--primary); border-color: var(--primary); color: white; transform: scale(1.1); }
.step-circle.completed { background: var(--accent);  border-color: var(--accent);  color: white; }
.step-label { font-size: .85rem; font-weight: 500; color: var(--text-muted); text-align: center; }
.step-indicator.active .step-label { color: var(--primary); font-weight: 600; }
.step-line { flex: 1; height: 2px; background: var(--border-color); margin: 0 1rem; align-self: center; margin-top: -25px; }

.topic-tree {
  max-height: 500px; overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: 8px; padding: 1rem;
  background: var(--bg-surface-2);
}
.topic-node-header { cursor: pointer; border-radius: 6px; transition: background .2s; }
.topic-node-header:hover { background: rgba(0,102,204,.05); }
.topic-item { padding: .5rem; border-radius: 6px; transition: background .2s; }
.topic-item:hover { background: rgba(0,200,150,.05); }
.topic-title { font-weight: 500; color: var(--text-primary); }
.topic-description { font-size: .85rem; color: var(--text-muted); margin-top: .25rem; }

/* Timeline */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before { content: ''; position: absolute; left: 15px; top: 0; bottom: 0; width: 2px; background: linear-gradient(to bottom, var(--primary), var(--accent)); }
.timeline-item { position: relative; margin-bottom: 2rem; }
.timeline-marker {
  position: absolute; left: -23px; top: 0;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--bg-surface-3);
  border: 2px solid var(--border-color);
  transition: all .3s;
}
.timeline-item.active .timeline-marker    { background: var(--primary); border-color: var(--primary); transform: scale(1.2); }
.timeline-item.completed .timeline-marker { background: var(--accent);  border-color: var(--accent); }
.timeline-content h6 { margin-bottom: .25rem; color: var(--text-primary); }
.timeline-content small { color: var(--text-muted); }

/* File items */
.file-item {
  background: var(--bg-surface-2);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: all .3s;
}
.file-item:hover { background: var(--bg-surface-3); transform: translateY(-1px); box-shadow: var(--shadow); }

/* Generated files grid */
.generated-files-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1rem; margin-top: 1rem; }

/* ── Analytics / Charts ──────────────────────────────────────── */
.chart-container { position: relative; height: 300px; margin: 1rem 0; }
.card canvas { max-height: 300px; }

.bar-chart { display: flex; align-items: flex-end; justify-content: space-around; height: 200px; padding: 1rem 0; border-bottom: 2px solid var(--border-color); }
.bar-item  { display: flex; flex-direction: column; align-items: center; flex: 1; margin: 0 2px; max-width: 40px; }
.bar { width: 100%; max-width: 30px; min-height: 5px; border-radius: 4px 4px 0 0; transition: all .3s; cursor: pointer; background: var(--primary); }
.bar:hover { opacity: .8; transform: translateY(-2px); }
.bar-label { font-size: .65rem; color: var(--text-muted); margin-top: .5rem; text-align: center; }

.h-bar-item { display: flex; align-items: center; gap: 1rem; }
.h-bar-label { font-size: .8rem; font-weight: 500; min-width: 100px; text-align: right; color: var(--text-primary); }
.h-bar-container { flex: 1; position: relative; height: 24px; background: var(--bg-surface-3); border-radius: 12px; overflow: hidden; }
.h-bar { height: 100%; border-radius: 12px; transition: width .5s; background: var(--primary); }
.h-bar-value { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); font-size: .7rem; font-weight: 600; color: white; }

/* ── Misc ────────────────────────────────────────────────────── */
.breadcrumb { background: none; padding: 0; margin: 0; font-size: .85rem; }
.breadcrumb-item a { color: var(--primary); text-decoration: none; }
.breadcrumb-item a:hover { text-decoration: underline; }
.breadcrumb-item.active { color: var(--text-muted); font-weight: 500; }

kbd {
  background: var(--primary-dark);
  color: white;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 4px;
  padding: .2em .4em;
  font-size: .8em;
  font-family: 'Inter', monospace;
}

.help-button {
  position: fixed; bottom: 2rem; right: 2rem;
  z-index: 1000;
  border-radius: 50%;
  width: 50px; height: 50px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-lg);
  background: var(--primary);
  color: white;
  border: none;
  cursor: pointer;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform .25s ease;
    z-index: 300;
    width: 256px !important;
    min-width: 256px !important;
    box-shadow: 4px 0 24px rgba(0,0,0,.12);
  }
  .sidebar.show, .sidebar.mobile-open { transform: translateX(0); }
  .sidebar-overlay.visible { display: block; }
  .sidebar.collapsed .sidebar-logo-text,
  .sidebar.collapsed .nav-item-label { display: flex !important; }

  .main-content, .app-main { margin-left: 0 !important; }
  .app-header h2, .topbar h2 { font-size: .9rem; }
  .lp-hero    { padding: 60px 0 48px; }
  .lp-section { padding: 56px 0; }
  .arch-flow  { flex-direction: column; }
  .arch-arrow { transform: rotate(90deg); }
  .content-area { padding: 16px; }
  .search-box input { width: 150px; }
}

/* ── Print ───────────────────────────────────────────────────── */
@media print {
  .sidebar, .app-header, .topbar, .topbar-actions, .btn, .pagination { display: none !important; }
  .main-content, .app-main { margin-left: 0 !important; }
  .card { border: 1px solid #ddd !important; box-shadow: none !important; }
}

/* ── No animations ───────────────────────────────────────────── */
.no-animations * {
  animation-duration: 0s !important;
  animation-delay: 0s !important;
  transition-duration: 0s !important;
  transition-delay: 0s !important;
}

/* ── Font size settings ──────────────────────────────────────── */
[data-font-size="large"] { font-size: 1.1rem; }
[data-font-size="large"] .kpi-value { font-size: 2.2rem; }
[data-font-size="large"] .btn { font-size: 1rem; padding: .5rem 1rem; }
[data-font-size="large"] .table { font-size: 1rem; }

/* ── Login / Auth pages ──────────────────────────────────────── */
.login-hero {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--accent-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  background: var(--bg-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-lg);
  padding: 3rem;
  width: 100%;
  max-width: 420px;
  margin: 2rem;
  border: 1px solid var(--border-color);
}

.login-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.login-logo h1 {
  color: var(--text-primary);
  font-size: 1.6rem;
  font-weight: 800;
  margin: 0;
}

.login-logo p {
  color: var(--text-muted);
  font-size: .88rem;
  margin: .5rem 0 0;
}

.input-group-text {
  background: var(--bg-surface-2);
  border-color: var(--border-color);
  color: var(--text-muted);
}