/* ============================================
   GCETTB Admin Panel - Stylesheet
   ============================================ */

:root {
  --navy: #0f1c3f;
  --navy-light: #1a2d5a;
  --gold: #e8a020;
  --white: #ffffff;
  --off-white: #f8f9fb;
  --gray-100: #f1f3f6;
  --gray-200: #e2e6ed;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --font: 'DM Sans', -apple-system, sans-serif;
  --radius: 10px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font); background: var(--off-white); color: var(--gray-700); }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* Layout */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.admin-sidebar {
  width: 240px;
  background: var(--navy);
  color: var(--white);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-brand {
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-brand h2 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 1px;
}

.sidebar-brand p {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.5);
  margin-top: 2px;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 0;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  font-size: 0.88rem;
  font-weight: 500;
  color: rgba(255,255,255,0.7);
  transition: all 0.2s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: rgba(255,255,255,0.1);
  color: var(--white);
  border-right: 3px solid var(--gold);
}

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

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.sidebar-footer a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color 0.2s;
}

.sidebar-footer a:hover { color: var(--white); }

/* Main content */
.admin-main {
  margin-left: 240px;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.admin-topbar {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}

.admin-topbar h1 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy);
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--gray-500);
}

.topbar-user .avatar {
  width: 32px;
  height: 32px;
  background: var(--navy);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
}

.admin-content {
  padding: 32px;
  flex: 1;
}

/* Stat cards */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow);
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-icon svg {
  width: 24px;
  height: 24px;
}

.stat-icon.navy { background: rgba(15,28,63,0.1); color: var(--navy); }
.stat-icon.gold { background: rgba(232,160,32,0.1); color: var(--gold); }
.stat-icon.success { background: rgba(16,185,129,0.1); color: var(--success); }
.stat-icon.danger { background: rgba(239,68,68,0.1); color: var(--danger); }

.stat-info h3 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1;
}

.stat-info p {
  font-size: 0.82rem;
  color: var(--gray-500);
  margin-top: 3px;
}

/* Admin Tables */
.admin-card {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 24px;
}

.admin-card-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.admin-card-header h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
}

.admin-card-body { padding: 24px; }

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  text-align: left;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-500);
  padding: 10px 14px;
  background: var(--gray-100);
  border-bottom: 1px solid var(--gray-200);
}

td {
  padding: 12px 14px;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--gray-200);
  vertical-align: middle;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--gray-100); }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 8px; font-size: 0.85rem; font-weight: 600; cursor: pointer; border: none; transition: all 0.2s; text-decoration: none; }
.btn-primary { background: var(--navy); color: var(--white); }
.btn-primary:hover { background: var(--navy-light); }
.btn-gold { background: var(--gold); color: var(--navy); }
.btn-gold:hover { background: #f5b535; }
.btn-danger { background: var(--danger); color: var(--white); }
.btn-danger:hover { background: #dc2626; }
.btn-success { background: var(--success); color: var(--white); }
.btn-sm { padding: 5px 12px; font-size: 0.8rem; }

/* Badges */
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 0.72rem; font-weight: 700; }
.badge-event { background: rgba(59,130,246,0.1); color: #1d4ed8; }
.badge-result { background: rgba(16,185,129,0.1); color: #065f46; }
.badge-exam { background: rgba(245,158,11,0.1); color: #92400e; }
.badge-notice { background: var(--gray-100); color: var(--gray-700); }
.badge-admission { background: rgba(167,139,250,0.1); color: #5b21b6; }
.badge-unread { background: rgba(239,68,68,0.1); color: var(--danger); }
.badge-read { background: rgba(16,185,129,0.1); color: var(--success); }

/* Forms */
.form-group { margin-bottom: 18px; }
.form-label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--navy); margin-bottom: 6px; }
.form-control { width: 100%; padding: 10px 14px; border: 1.5px solid var(--gray-200); border-radius: 8px; font-size: 0.9rem; color: var(--gray-700); background: var(--white); outline: none; transition: all 0.2s; font-family: var(--font); }
.form-control:focus { border-color: var(--navy); box-shadow: 0 0 0 3px rgba(15,28,63,0.08); }
textarea.form-control { resize: vertical; min-height: 100px; }
select.form-control { cursor: pointer; }

/* Alert */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 20px; font-size: 0.88rem; font-weight: 500; }
.alert-success { background: rgba(16,185,129,0.1); color: #065f46; border: 1px solid rgba(16,185,129,0.3); }
.alert-danger { background: rgba(239,68,68,0.1); color: #991b1b; border: 1px solid rgba(239,68,68,0.3); }

/* Gallery admin grid */
.gallery-admin-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.gallery-admin-item {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--gray-200);
}

.gallery-admin-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-admin-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s;
}

.gallery-admin-item:hover .gallery-admin-overlay { opacity: 1; }

/* Login page */
.admin-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--navy);
}

.login-box {
  background: var(--white);
  border-radius: 16px;
  padding: 44px 40px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.login-logo {
  text-align: center;
  margin-bottom: 28px;
}

.login-logo h1 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: 1px;
}

.login-logo p {
  font-size: 0.82rem;
  color: var(--gray-500);
  margin-top: 4px;
}

.login-divider {
  width: 40px;
  height: 3px;
  background: var(--gold);
  margin: 12px auto;
  border-radius: 2px;
}

/* ── Admin Sidebar Scrollable ── */
.admin-sidebar {
  overflow-y: auto;
  overflow-x: hidden;
}
.admin-sidebar::-webkit-scrollbar { width: 4px; }
.admin-sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 2px; }

/* ── Responsive Admin ── */
@media (max-width: 900px) {
  .admin-layout { flex-direction: column; }
  .admin-sidebar { width: 100%; position: relative; height: auto; flex-direction: row; overflow-x: auto; display: flex; flex-wrap: nowrap; }
  .sidebar-brand { padding: 12px 16px; border-bottom: none; border-right: 1px solid rgba(255,255,255,0.1); flex-shrink: 0; }
  .sidebar-nav { display: flex; flex-direction: row; overflow-x: auto; padding: 8px 0; flex: 1; white-space: nowrap; }
  .sidebar-nav a { padding: 8px 12px; font-size: 0.78rem; border-right: none; border-bottom: 3px solid transparent; flex-direction: column; gap: 3px; text-align: center; }
  .sidebar-nav a.active { border-right: none; border-bottom-color: var(--gold); }
  .sidebar-nav a svg { display: none; }
  .sidebar-footer { padding: 8px 12px; border-top: none; border-left: 1px solid rgba(255,255,255,0.1); flex-shrink: 0; display: flex; align-items: center; }
  .admin-main { margin-left: 0; }
  .stat-cards { grid-template-columns: repeat(2, 1fr); }
  .gallery-admin-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .stat-cards { grid-template-columns: 1fr 1fr; }
  .admin-content { padding: 16px; }
  table { font-size: 0.78rem; }
  th, td { padding: 8px 10px; }
  .admin-topbar { padding: 12px 16px; }
  .admin-topbar h1 { font-size: 0.95rem; }
  .login-box { padding: 28px 20px; }
}

/* ── Table responsive wrapper ── */
.admin-card table { min-width: 600px; }
.admin-card { overflow-x: auto; }

/* ── Stat cards ── */
.stat-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 16px; }