@import url('https://fonts.googleapis.com/css2?family=Hind+Siliguri:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
  --font-primary: 'Hind Siliguri', 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-numeral: 'Hind Siliguri', 'Outfit', sans-serif;

  /* Colors */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-glow: rgba(37, 99, 235, 0.2);

  --secondary: #4f46e5;
  --accent: #06b6d4;
  --success: #10b981;
  --success-light: #ecfdf5;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --info: #3b82f6;

  /* Neutrals */
  --bg-app: #f8fafc;
  --bg-card: #ffffff;
  --bg-sidebar: #0f172a;
  --sidebar-text: #94a3b8;
  --sidebar-active: #ffffff;
  --sidebar-hover-bg: #1e293b;

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --border-color: #e2e8f0;
  --border-light: #f1f5f9;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --bg-app: #090d16;
  --bg-card: #111827;
  --bg-sidebar: #0b0f19;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --border-color: #1f2937;
  --border-light: #374151;
  --primary-light: rgba(37, 99, 235, 0.15);
  --success-light: rgba(16, 185, 129, 0.15);
  --warning-light: rgba(245, 158, 11, 0.15);
  --danger-light: rgba(239, 68, 68, 0.15);
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.6;
  font-size: 15px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--primary-hover);
}

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

/* Sidebar */
.app-sidebar {
  width: 270px;
  background-color: var(--bg-sidebar);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 50;
  transition: var(--transition);
  overflow-y: auto;
  border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-header {
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-logo {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 20px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.sidebar-brand h2 {
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.2;
}

.sidebar-brand p {
  font-size: 11px;
  color: #64748b;
  font-weight: 500;
}

.sidebar-nav {
  padding: 16px 12px;
  flex: 1;
}

.nav-group-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #475569;
  font-weight: 700;
  padding: 14px 12px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  color: var(--sidebar-text);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 4px;
  transition: var(--transition);
}

.nav-item:hover {
  background-color: var(--sidebar-hover-bg);
  color: #fff;
  transform: translateX(3px);
}

.nav-item.active {
  background: linear-gradient(90deg, #2563eb, #3b82f6);
  color: #fff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.nav-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.nav-badge {
  margin-left: auto;
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

/* Main Content Area */
.app-main {
  flex: 1;
  margin-left: 270px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: var(--transition);
}

/* Top Navbar */
.app-header {
  height: 70px;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 40;
  box-shadow: var(--shadow-sm);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.institution-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background-color: var(--primary-light);
  border-radius: var(--radius-md);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.role-switcher-select {
  padding: 6px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-app);
  font-family: var(--font-primary);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-main);
  cursor: pointer;
}

.btn-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  transition: var(--transition);
}

.btn-icon:hover {
  background: var(--bg-app);
  color: var(--text-main);
}

.user-profile-menu {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 8px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}

.user-avatar {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  border: 2px solid #fff;
  box-shadow: var(--shadow-sm);
}

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

.user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.2;
}

.user-role {
  font-size: 11px;
  color: var(--text-muted);
}

/* Page Content Body */
.page-body {
  padding: 28px;
  flex: 1;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Cards & Widgets */
.card {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  margin-bottom: 24px;
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-light);
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* KPI Stat Cards Grid */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 22px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary);
}

.stat-card.stat-success::before { background: var(--success); }
.stat-card.stat-warning::before { background: var(--warning); }
.stat-card.stat-danger::before { background: var(--danger); }
.stat-card.stat-accent::before { background: var(--accent); }

.stat-info h3 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.stat-info p {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 4px;
}

.stat-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  color: var(--primary);
}

.stat-card.stat-success .stat-icon { background: var(--success-light); color: var(--success); }
.stat-card.stat-warning .stat-icon { background: var(--warning-light); color: var(--warning); }
.stat-card.stat-danger .stat-icon { background: var(--danger-light); color: var(--danger); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px var(--primary-glow);
}

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

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }

.btn-outline {
  background: transparent;
  border-color: var(--border-color);
  color: var(--text-main);
}

.btn-outline:hover {
  background: var(--bg-app);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
  font-family: var(--font-primary);
  font-size: 14px;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.table th {
  background-color: var(--bg-app);
  padding: 12px 16px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-main);
  vertical-align: middle;
}

.table tbody tr:hover {
  background-color: rgba(37, 99, 235, 0.02);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
}

.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-primary { background: var(--primary-light); color: var(--primary); }

/* Alerts & Toasts */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.alert-success { background: var(--success-light); color: #065f46; border: 1px solid #a7f3d0; }
.alert-error, .alert-danger { background: var(--danger-light); color: #991b1b; border: 1px solid #fecaca; }
.alert-warning { background: var(--warning-light); color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: var(--primary-light); color: #1e40af; border: 1px solid #bfdbfe; }

/* Quick Action Grid */
.quick-action-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
}

.quick-action-btn {
  background: var(--bg-app);
  border: 1px solid var(--border-color);
  padding: 16px 12px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-main);
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  transition: var(--transition);
}

.quick-action-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
}

.quick-action-btn svg {
  width: 24px;
  height: 24px;
}

/* Footer */
.app-footer {
  padding: 18px 28px;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
}