/* ==========================================================================
   StudentLab Design System
   Modern Dark-Mode, Glassmorphism, Micro-Animations & Fluid Responsive UI
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --bg-main: #090d16;
  --bg-surface: #0f172a;
  --bg-surface-elevated: #1e293b;
  --bg-glass: rgba(15, 23, 42, 0.75);
  --bg-glass-card: rgba(30, 41, 59, 0.6);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-hover: rgba(255, 255, 255, 0.18);
  --border-accent: rgba(56, 189, 248, 0.4);

  --primary: #0ea5e9;
  --primary-hover: #38bdf8;
  --primary-glow: rgba(14, 165, 233, 0.35);
  --accent: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.3);
  
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.12);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.12);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.12);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

body {
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(14, 165, 233, 0.12) 0px, transparent 50%),
    radial-gradient(at 50% 100%, rgba(15, 23, 42, 0.8) 0px, transparent 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: 2.25rem; line-height: 1.2; }
h2 { font-size: 1.5rem; line-height: 1.3; }
h3 { font-size: 1.2rem; }

p {
  color: var(--text-secondary);
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(9, 13, 22, 0.8);
  border-bottom: 1px solid var(--border-glass);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.brand-logo svg {
  width: 22px;
  height: 22px;
  fill: #fff;
}

.brand-text {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.03em;
}

.brand-badge {
  font-size: 0.68rem;
  padding: 0.2rem 0.5rem;
  background: rgba(14, 165, 233, 0.15);
  color: var(--primary-hover);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-full);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-user-menu {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-email-chip {
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: var(--bg-surface-elevated);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.role-badge {
  font-size: 0.7rem;
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-full);
  font-weight: 700;
}
.role-badge.admin {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.4);
}
.role-badge.student {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

/* Layout container */
.main-wrapper {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  flex: 1;
}

/* Glass Cards */
.glass-card {
  background: var(--bg-glass-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.36);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
  border-color: var(--border-glass-hover);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-normal);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px var(--primary-glow);
  filter: brightness(1.08);
}

.btn-secondary {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-glass-hover);
  transform: translateY(-1px);
}

.btn-danger {
  background: var(--danger-bg);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.25);
  color: #fff;
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.form-input {
  width: 100%;
  padding: 0.85rem 1.1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition-fast);
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: rgba(15, 23, 42, 0.9);
}

.form-input-prefix-group {
  display: flex;
  align-items: center;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.form-input-prefix-group:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-input-prefix-group input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0.85rem 1.1rem;
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  font-family: var(--font-body);
}

.form-input-suffix {
  padding: 0.85rem 1.1rem;
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  background: rgba(255, 255, 255, 0.03);
  border-left: 1px solid var(--border-glass);
  font-weight: 600;
}

/* Drag & Drop Upload Zone */
.dropzone {
  border: 2px dashed var(--border-glass-hover);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  background: rgba(15, 23, 42, 0.4);
  transition: all var(--transition-normal);
  position: relative;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary);
  background: rgba(14, 165, 233, 0.06);
  box-shadow: 0 0 24px rgba(14, 165, 233, 0.15);
}

.dropzone-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 1rem;
  border-radius: var(--radius-full);
  background: rgba(14, 165, 233, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.dropzone input[type="file"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.file-selected-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  padding: 0.4rem 1rem;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

/* Checkbox styling */
.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
  user-select: none;
}

.checkbox-group input[type="checkbox"] {
  margin-top: 0.25rem;
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
}

.checkbox-label {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Alerts / Banners */
.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.92rem;
}

.alert-success {
  background: var(--success-bg);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #6ee7b7;
}

.alert-danger {
  background: var(--danger-bg);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.alert-info {
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(14, 165, 233, 0.3);
  color: #7dd3fc;
}

/* Grid & Dashboard layout */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2rem;
}

@media (max-width: 900px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

/* Sites List & Cards */
.site-item-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: all var(--transition-normal);
}

.site-item-card:hover {
  border-color: var(--border-accent);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

.site-url-link {
  color: var(--primary);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.site-url-link:hover {
  text-decoration: underline;
  color: var(--primary-hover);
}

.site-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.75rem;
  background: rgba(0, 0, 0, 0.2);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.meta-item-label {
  color: var(--text-muted);
  margin-bottom: 0.15rem;
}

.meta-item-val {
  color: var(--text-primary);
  font-weight: 600;
  font-family: var(--font-mono);
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}

.admin-table th {
  padding: 0.85rem 1rem;
  background: rgba(0, 0, 0, 0.25);
  color: var(--text-secondary);
  font-weight: 600;
  border-bottom: 1px solid var(--border-glass);
}

.admin-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-glass);
  color: var(--text-primary);
}

.admin-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Stat Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  font-family: var(--font-heading);
  color: var(--primary);
  margin-top: 0.35rem;
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-glass);
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}