/* ========================================================
   Online Academic Advising and Counselling System
   Core Modern CSS Design System (Glassmorphism & Responsive)
   ======================================================== */

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

:root {
  /* Color Palette - Vibrant Dark/Light Glass Design System */
  --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
  --surface-glass: rgba(30, 41, 59, 0.7);
  --surface-glass-border: rgba(255, 255, 255, 0.1);
  --surface-card: #1e293b;
  --surface-card-hover: #334155;
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.3);
  
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --accent-amber: #f59e0b;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --glass-backdrop: blur(16px);
  --font-family: 'Plus Jakarta Sans', sans-serif;
  --font-heading: 'Outfit', sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background: var(--bg-gradient);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
  font-weight: 600;
}

/* Glassmorphism Containers */
.glass-panel {
  background: var(--surface-glass);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.glass-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: all 0.3s ease;
}

.glass-card:hover {
  background: rgba(51, 65, 85, 0.6);
  transform: translateY(-2px);
  border-color: rgba(99, 102, 241, 0.3);
}

/* Layout App Shell */
#app-root {
  display: flex;
  min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
  width: 280px;
  background: rgba(15, 23, 42, 0.85);
  border-right: 1px solid var(--surface-glass-border);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1rem;
  position: fixed;
  height: 100vh;
  z-index: 100;
  transition: transform 0.3s ease;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  margin-bottom: 2rem;
}

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  box-shadow: 0 0 15px var(--primary-glow);
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-section {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: all 0.2s ease;
  cursor: pointer;
}

.nav-link:hover, .nav-link.active {
  color: #fff;
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.25), rgba(99, 102, 241, 0.05));
  border-left: 3px solid var(--primary);
}

/* User Card in Sidebar */
.user-sidebar-card {
  margin-top: auto;
  padding: 1rem;
  background: rgba(30, 41, 59, 0.6);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border: 1px solid var(--surface-glass-border);
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-emerald));
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
}

/* Main Content Area */
.main-wrapper {
  flex: 1;
  margin-left: 280px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.top-bar {
  height: 70px;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--surface-glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 90;
}

.page-title {
  font-size: 1.35rem;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.content-body {
  padding: 2rem;
  flex: 1;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: #fff;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px var(--primary-glow);
}

.btn-secondary {
  background: rgba(51, 65, 85, 0.8);
  color: var(--text-main);
  border: 1px solid var(--surface-glass-border);
}

.btn-secondary:hover {
  background: #475569;
}

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

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
}

/* Badges */
.badge {
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.badge-success { background: rgba(16, 185, 129, 0.2); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-danger { background: rgba(244, 63, 94, 0.2); color: #f87171; border: 1px solid rgba(244, 63, 94, 0.3); }
.badge-info { background: rgba(6, 182, 212, 0.2); color: #38bdf8; border: 1px solid rgba(6, 182, 212, 0.3); }
.badge-confidential { background: rgba(168, 85, 247, 0.25); color: #c084fc; border: 1px solid rgba(168, 85, 247, 0.4); }

/* Form Controls */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-md);
  color: #fff;
  font-family: inherit;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

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

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(8px);
  display: grid;
  place-items: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: #1e293b;
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: transform 0.3s ease;
}

.modal-backdrop.active .modal-content {
  transform: scale(1);
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--surface-glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--surface-glass-border);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* Utilities */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .main-wrapper { margin-left: 0; }
  .grid-2 { grid-template-columns: 1fr; }
}

/* Shared Keyframes */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

/* Scrollbar Styling */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: rgba(255,255,255,0.02); }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(99,102,241,0.4); }

/* Select option dark styling */
select option { background: #1e293b; color: #f8fafc; }

/* Print styles */
@media print {
  .sidebar, .top-bar, .demo-switcher-bar, .btn, .quick-actions { display: none !important; }
  .main-wrapper { margin-left: 0 !important; }
  body { background: white; color: black; }
}