/* ============================================================
   FocusPoint Attendance System — Master Stylesheet
   Colors: Primary #0f3460 | Accent #e94560 | Dark #1a1a2e
   ============================================================ */

:root {
  --primary: #0f3460;
  --primary-light: #1a4a8a;
  --accent: #e94560;
  --accent-dark: #c0392b;
  --dark: #1a1a2e;
  --dark-light: #16213e;
  --bg: #f0f4ff;
  --white: #ffffff;
  --gray-50: #f8faff;
  --gray-100: #eef2fa;
  --gray-200: #dde3f0;
  --gray-300: #b8c4db;
  --gray-400: #8b9ab8;
  --gray-500: #6b7a94;
  --gray-600: #4a5568;
  --gray-700: #333;
  --success: #27ae60;
  --warning: #f39c12;
  --danger: #e74c3c;
  --info: #3498db;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 20px rgba(0,0,0,0.07);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --transition: all 0.3s ease;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--gray-700);
  min-height: 100vh;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--accent); }

/* ─── SIDEBAR (Admin) ─── */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: 260px; height: 100vh;
  background: linear-gradient(180deg, var(--dark) 0%, var(--dark-light) 100%);
  color: #fff;
  z-index: 1000;
  overflow-y: auto;
  transition: var(--transition);
}
.sidebar-brand {
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-align: center;
}
.sidebar-brand h4 { font-size: 14px; letter-spacing: 2px; color: var(--accent); text-transform: uppercase; font-weight: 700; }
.sidebar-brand p { font-size: 11px; color: var(--gray-400); margin-top: 4px; }
.sidebar-nav { padding: 16px 0; }
.sidebar-nav .nav-section { padding: 8px 20px; font-size: 10px; text-transform: uppercase; letter-spacing: 2px; color: var(--gray-400); margin-top: 12px; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 20px;
  color: var(--gray-300);
  font-size: 14px;
  transition: var(--transition);
  border-left: 3px solid transparent;
}
.sidebar-nav a:hover, .sidebar-nav a.active {
  background: rgba(255,255,255,0.06);
  color: #fff;
  border-left-color: var(--accent);
}
.sidebar-nav a .icon { width: 20px; text-align: center; font-size: 16px; }
.sidebar-nav .badge-count {
  margin-left: auto;
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 700;
}

/* ─── MAIN CONTENT ─── */
.main-content {
  margin-left: 260px;
  min-height: 100vh;
  transition: var(--transition);
}
.topbar {
  background: var(--white);
  padding: 16px 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 10px rgba(0,0,0,0.04);
  position: sticky;
  top: 0;
  z-index: 100;
}
.topbar h2 { font-size: 20px; font-weight: 700; color: var(--dark); }
.topbar .user-info { display: flex; align-items: center; gap: 12px; }
.topbar .user-info img { width: 36px; height: 36px; border-radius: 50%; object-fit: cover; }
.topbar .user-info span { font-size: 14px; color: var(--gray-600); }

.content-area { padding: 24px 30px; }

/* ─── CARDS ─── */
.card-custom {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: none;
  overflow: hidden;
}
.card-custom .card-header-custom {
  padding: 18px 24px;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-custom .card-header-custom h5 { font-size: 16px; font-weight: 700; color: var(--dark); }
.card-custom .card-body-custom { padding: 24px; }

/* ─── STAT CARDS ─── */
.stat-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
  border-left: 4px solid var(--primary);
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.stat-card.accent { border-left-color: var(--accent); }
.stat-card.success { border-left-color: var(--success); }
.stat-card.warning { border-left-color: var(--warning); }
.stat-card .stat-icon {
  width: 52px; height: 52px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  background: var(--gray-50);
}
.stat-card .stat-info h3 { font-size: 28px; font-weight: 800; color: var(--dark); line-height: 1; }
.stat-card .stat-info p { font-size: 12px; color: var(--gray-500); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.5px; }

/* ─── BUTTONS ─── */
.btn-primary-custom {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff; border: none; border-radius: var(--radius-sm);
  padding: 10px 24px; font-weight: 600; font-size: 14px;
  transition: var(--transition); cursor: pointer;
}
.btn-primary-custom:hover { transform: translateY(-1px); box-shadow: 0 4px 15px rgba(15,52,96,0.3); color: #fff; }
.btn-accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff; border: none; border-radius: var(--radius-sm);
  padding: 10px 24px; font-weight: 600; font-size: 14px;
  transition: var(--transition); cursor: pointer;
}
.btn-accent:hover { transform: translateY(-1px); box-shadow: 0 4px 15px rgba(233,69,96,0.3); color: #fff; }

/* ─── TABLES ─── */
.table-custom { width: 100%; border-collapse: collapse; }
.table-custom th {
  background: var(--gray-50);
  padding: 12px 16px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-500);
  font-weight: 700;
  border-bottom: 2px solid var(--gray-200);
  text-align: left;
}
.table-custom td {
  padding: 12px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--gray-100);
  vertical-align: middle;
}
.table-custom tbody tr:hover { background: var(--gray-50); }

/* ─── STATUS BADGES ─── */
.badge-status {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.badge-scheduled { background: #eef2ff; color: var(--primary); }
.badge-live { background: #fef3e2; color: #e67e22; animation: pulse 2s infinite; }
.badge-completed { background: #eafaf1; color: var(--success); }
.badge-cancelled { background: #fdecea; color: var(--danger); }
.badge-booked { background: #eef2ff; color: var(--primary); }
.badge-attended { background: #eafaf1; color: var(--success); }
.badge-absent { background: #fdecea; color: var(--danger); }

@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.7; } }

/* ─── FORMS ─── */
.form-control-custom {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--gray-700);
  background: var(--gray-50);
  transition: var(--transition);
  outline: none;
}
.form-control-custom:focus { border-color: var(--primary); background: var(--white); box-shadow: 0 0 0 3px rgba(15,52,96,0.1); }
.form-label-custom { font-size: 13px; font-weight: 600; color: var(--gray-700); margin-bottom: 6px; display: block; }
.form-label-custom .req { color: var(--accent); }

/* ─── QR SCANNER AREA ─── */
.scanner-container {
  background: var(--dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  max-width: 480px;
  margin: 0 auto;
}
.scanner-container video {
  width: 100%;
  display: block;
}
.scanner-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
}
.scanner-frame {
  width: 220px; height: 220px;
  border: 3px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: 0 0 0 9999px rgba(0,0,0,0.5);
  animation: scanPulse 2s ease-in-out infinite;
}
@keyframes scanPulse { 0%,100% { border-color: var(--accent); } 50% { border-color: var(--success); } }

.scan-result {
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  margin-top: 16px;
}
.scan-result.success { border: 2px solid var(--success); }
.scan-result.error { border: 2px solid var(--danger); }

/* ─── STUDENT MOBILE APP PATTERN ─── */
.student-app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  background: var(--bg);
  position: relative;
}
.student-header {
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
  color: #fff;
  padding: 20px;
  padding-top: 16px;
  border-radius: 0 0 24px 24px;
}
.student-header .greeting { font-size: 13px; color: var(--gray-300); }
.student-header .name { font-size: 22px; font-weight: 700; margin-top: 4px; }
.student-header .dept { font-size: 12px; color: var(--gray-400); margin-top: 2px; }

.student-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: -30px 16px 16px;
  position: relative;
  z-index: 10;
}
.student-stat-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 16px 12px;
  text-align: center;
  box-shadow: var(--shadow);
}
.student-stat-card .num { font-size: 24px; font-weight: 800; color: var(--primary); }
.student-stat-card .label { font-size: 10px; color: var(--gray-500); text-transform: uppercase; margin-top: 4px; letter-spacing: 0.5px; }

.student-section { padding: 0 16px 16px; }
.student-section .section-title {
  font-size: 16px; font-weight: 700; color: var(--dark);
  margin-bottom: 12px;
  display: flex; justify-content: space-between; align-items: center;
}
.student-section .section-title a { font-size: 12px; color: var(--accent); font-weight: 600; }

.class-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}
.class-card:hover { transform: translateX(4px); }
.class-card.live { border-left-color: var(--warning); }
.class-card .class-title { font-size: 15px; font-weight: 700; color: var(--dark); }
.class-card .class-meta { font-size: 12px; color: var(--gray-500); margin-top: 6px; display: flex; gap: 16px; flex-wrap: wrap; }
.class-card .class-meta span { display: flex; align-items: center; gap: 4px; }

.qr-display {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  margin: 16px;
}
.qr-display img {
  width: 240px; height: 240px;
  border-radius: var(--radius);
  border: 4px solid var(--gray-100);
}
.qr-display .qr-label { margin-top: 12px; font-size: 14px; color: var(--gray-600); font-weight: 600; }

/* ─── BOTTOM NAV (Student Mobile) ─── */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  background: var(--white);
  display: flex;
  justify-content: space-around;
  padding: 8px 0 12px;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
  border-radius: 20px 20px 0 0;
  z-index: 100;
}
.bottom-nav a {
  display: flex; flex-direction: column; align-items: center;
  font-size: 10px; color: var(--gray-400); padding: 4px 12px;
  transition: var(--transition); text-decoration: none;
}
.bottom-nav a .nav-icon { font-size: 20px; margin-bottom: 2px; }
.bottom-nav a.active { color: var(--accent); }
.bottom-nav a:hover { color: var(--primary); }

/* ─── AUTH PAGES ─── */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
  padding: 20px;
}
.auth-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
}
.auth-card .auth-logo { text-align: center; margin-bottom: 24px; }
.auth-card .auth-logo h3 { font-size: 13px; letter-spacing: 3px; color: var(--accent); text-transform: uppercase; font-weight: 700; }
.auth-card .auth-logo h2 { font-size: 22px; color: var(--dark); margin-top: 8px; }
.auth-card .auth-logo p { font-size: 13px; color: var(--gray-500); margin-top: 4px; }

/* ─── LOADING SPINNER ─── */
.spinner {
  width: 40px; height: 40px;
  border: 4px solid var(--gray-200);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 20px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── RESPONSIVE ─── */
@media (max-width: 992px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
}
@media (max-width: 768px) {
  .content-area { padding: 16px; }
  .stat-card { padding: 16px; }
  .stat-card .stat-info h3 { font-size: 22px; }
}
@media (max-width: 480px) {
  .auth-card { padding: 24px; }
  .student-stats { grid-template-columns: repeat(3, 1fr); gap: 8px; }
}