/* =========================================
   RESET & ROOT VARIABLES
   ========================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:       #1a6fcf;
  --primary-dark:  #155bb0;
  --primary-light: #e8f1fc;
  --teal:          #0e9f9f;
  --indigo:        #5b4fcf;
  --green:         #16a34a;
  --danger:        #dc2626;
  --warning:       #d97706;

  --bg:            #f0f4f9;
  --surface:       #ffffff;
  --border:        #d9e3ef;
  --text:          #1e293b;
  --text-muted:    #64748b;

  --sidebar-w:     240px;
  --topbar-h:      64px;
  --radius:        10px;
  --shadow:        0 2px 10px rgba(0,0,0,0.08);
  --shadow-md:     0 4px 20px rgba(0,0,0,0.12);
  --transition:    0.25s ease;

  --font:          'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  display: flex;
  min-height: 100vh;
}

/* =========================================
   SIDEBAR
   ========================================= */
.sidebar {
  width: var(--sidebar-w);
  background: linear-gradient(180deg, #0f2d5e 0%, #1a4a94 100%);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 1000;
  transition: transform var(--transition);
  box-shadow: 4px 0 20px rgba(0,0,0,0.15);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.brand-icon {
  font-size: 28px;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.5px;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 8px;
  text-decoration: none;
  color: rgba(255,255,255,0.72);
  font-size: 14.5px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.nav-item:hover {
  background: rgba(255,255,255,0.1);
  color: #ffffff;
}

.nav-item.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(26,111,207,0.45);
}

.nav-icon { font-size: 18px; }
.nav-label { font-size: 14px; }

.sidebar-footer {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.45);
  font-size: 12px;
}

/* =========================================
   MAIN WRAPPER
   ========================================= */
.main-wrapper {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* =========================================
   TOPBAR
   ========================================= */
.topbar {
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 28px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--text);
}

.topbar-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  flex: 1;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--teal));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
}

.topbar-user {
  font-weight: 500;
  font-size: 14px;
  color: var(--text-muted);
}

/* =========================================
   CONTENT
   ========================================= */
.content {
  flex: 1;
  padding: 32px 36px;
}

.section { display: none; }
.section.active { display: block; }

.section-heading {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.section-sub {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

/* =========================================
   STATS CARDS
   ========================================= */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 22px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow);
  border-top: 4px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.stat-card.blue   { border-color: var(--primary); }
.stat-card.teal   { border-color: var(--teal); }
.stat-card.indigo { border-color: var(--indigo); }
.stat-card.green  { border-color: var(--green); }

.stat-icon { font-size: 34px; }

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 30px;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
}

.stat-label {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

/* =========================================
   CARDS
   ========================================= */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow: hidden;
}

.card-header {
  padding: 16px 22px;
  border-bottom: 1px solid var(--border);
  background: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.card-header h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.card-body { padding: 20px 22px; }

.form-card { margin-bottom: 0; }
.mt-20 { margin-top: 20px; }
.recent-section { margin-top: 0; }
.mb-24 { margin-bottom: 24px; }

/* =========================================
   FORMS
   ========================================= */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full-width { grid-column: 1 / -1; }

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: 7px;
  font-size: 14px;
  font-family: var(--font);
  color: var(--text);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,111,207,0.12);
}

.form-group textarea { resize: vertical; }

/* =========================================
   BUTTONS
   ========================================= */
.btn {
  padding: 11px 24px;
  border: none;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  font-family: var(--font);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-danger {
  background: #fef2f2;
  color: var(--danger);
  border: 1px solid #fecaca;
  padding: 6px 12px;
  font-size: 12px;
}

.btn-danger:hover {
  background: var(--danger);
  color: #fff;
}

/* =========================================
   TABLES
   ========================================= */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

.data-table thead tr {
  background: var(--primary-light);
}

.data-table th {
  padding: 12px 14px;
  text-align: left;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--primary-dark);
  white-space: nowrap;
}

.data-table td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  color: var(--text);
}

.data-table tbody tr:last-child td { border-bottom: none; }

.data-table tbody tr:hover { background: #f8fafc; }

/* =========================================
   STATUS BADGES
   ========================================= */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11.5px;
  font-weight: 600;
  text-transform: capitalize;
}

.badge-confirmed  { background: #dcfce7; color: #15803d; }
.badge-scheduled  { background: #dbeafe; color: #1d4ed8; }
.badge-pending    { background: #fef9c3; color: #92400e; }
.badge-cancelled  { background: #fee2e2; color: var(--danger); }

/* =========================================
   SEARCH BOX
   ========================================= */
.search-box {
  padding: 8px 12px;
  border: 1.5px solid var(--border);
  border-radius: 7px;
  font-size: 13px;
  width: 220px;
  outline: none;
  transition: border-color var(--transition);
}

.search-box:focus { border-color: var(--primary); }

/* =========================================
   EMPTY STATE
   ========================================= */
.empty-state {
  text-align: center;
  padding: 32px 16px;
  color: var(--text-muted);
  font-size: 14px;
  display: none;
}

/* =========================================
   TOAST
   ========================================= */
.toast {
  position: fixed;
  bottom: 28px;
  right: 28px;
  background: #1e293b;
  color: #fff;
  padding: 13px 22px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.35s ease, transform 0.35s ease;
  z-index: 9999;
  pointer-events: none;
  max-width: 320px;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast.success { background: var(--green); }
.toast.error   { background: var(--danger); }

/* =========================================
   TEAM GRID (ABOUT PAGE)
   ========================================= */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.team-member {
  background: var(--primary-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.team-member:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.team-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.team-matric {
  font-size: 12.5px;
  color: var(--primary);
  font-weight: 500;
}

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-wrapper {
    margin-left: 0;
  }
  .menu-toggle {
    display: block;
  }
  .content {
    padding: 20px 16px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .search-box { width: 100%; }
}