/* ============================================================
   UTS Admin Panel - Stylesheet
   ============================================================ */

:root {
  --admin-bg: #0a0a0f;
  --admin-sidebar: #0d0d16;
  --admin-card: rgba(255,255,255,0.04);
  --admin-border: rgba(255,255,255,0.08);
  --admin-cyan: #0693e3;
  --admin-purple: #0693e3;
  --admin-gradient: linear-gradient(135deg, #0369a1, #0693e3);
  --admin-text: #f0f4ff;
  --admin-text-muted: #8b9ab5;
  --admin-sidebar-width: 260px;
}

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--admin-bg);
  color: var(--admin-text);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

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

/* ── Sidebar ── */
.admin-sidebar {
  width: var(--admin-sidebar-width);
  background: var(--admin-sidebar);
  border-right: 1px solid var(--admin-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  overflow-y: auto;
}

.admin-sidebar-logo {
  padding: 24px 20px;
  border-bottom: 1px solid var(--admin-border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.admin-sidebar-logo img { height: 34px; }

.admin-sidebar-badge {
  background: var(--admin-gradient);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 100px;
  letter-spacing: .06em;
}

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

.admin-nav-section {
  margin-bottom: 24px;
}

.admin-nav-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--admin-text-muted);
  padding: 0 10px;
  margin-bottom: 8px;
}

.admin-nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--admin-text-muted);
  transition: all 0.2s ease;
  margin-bottom: 2px;
  position: relative;
}

.admin-nav-link:hover {
  background: rgba(255,255,255,0.06);
  color: var(--admin-text);
}

.admin-nav-link.active {
  background: rgba(6,147,227,0.12);
  color: var(--admin-cyan);
  border: 1px solid rgba(6,147,227,0.2);
}

.admin-nav-link i { width: 18px; text-align: center; font-size: 0.95rem; }

.admin-nav-badge {
  margin-left: auto;
  background: var(--admin-cyan);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 100px;
  min-width: 18px;
  text-align: center;
}

.admin-nav-badge.red { background: #cf2e2e; }

.admin-sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--admin-border);
}

.admin-sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.admin-avatar {
  width: 36px; height: 36px;
  background: var(--admin-gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
}

.admin-username { font-size: 0.88rem; font-weight: 600; }
.admin-role { font-size: 0.72rem; color: var(--admin-text-muted); }

/* ── Main area ── */
.admin-main {
  flex: 1;
  margin-left: var(--admin-sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.admin-topbar {
  background: rgba(13,13,22,0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--admin-border);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

.admin-topbar-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.admin-topbar-actions { display: flex; gap: 12px; }

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

/* ── Stat cards ── */
.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.admin-stat-card {
  background: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 16px;
  padding: 24px;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.admin-stat-card:hover {
  border-color: rgba(6,147,227,0.3);
  transform: translateY(-2px);
}

.admin-stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--admin-gradient);
  opacity: 0;
  transition: opacity 0.2s;
}

.admin-stat-card:hover::before { opacity: 1; }

.admin-stat-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.icon-blue { background: rgba(6,147,227,0.15); color: var(--admin-cyan); }
.icon-purple { background: rgba(6,147,227,0.15); color: var(--admin-cyan); }
.icon-green { background: rgba(0,208,132,0.15); color: #00d084; }
.icon-orange { background: rgba(255,165,0,0.15); color: #ffa500; }
.icon-red { background: rgba(207,46,46,0.15); color: #ff6464; }

.admin-stat-value {
  font-size: 2rem;
  font-weight: 700;
  font-family: 'Space Grotesk', sans-serif;
  line-height: 1;
  margin-bottom: 4px;
}

.admin-stat-label { font-size: 0.82rem; color: var(--admin-text-muted); }

.admin-stat-delta {
  font-size: 0.75rem;
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.delta-up { color: #00d084; }
.delta-down { color: #ff6464; }

/* ── Panels / Cards ── */
.admin-panel {
  background: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 24px;
}

.admin-panel-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--admin-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.admin-panel-title {
  font-size: 0.95rem;
  font-weight: 700;
}

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

/* ── Table ── */
.admin-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th {
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--admin-text-muted);
  padding: 12px 16px;
  border-bottom: 1px solid var(--admin-border);
  white-space: nowrap;
}

.admin-table td {
  padding: 14px 16px;
  font-size: 0.88rem;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  vertical-align: middle;
}

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

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

/* ── Status badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 0.73rem;
  font-weight: 700;
}

.badge-green { background: rgba(0,208,132,0.12); color: #00d084; border: 1px solid rgba(0,208,132,0.25); }
.badge-red { background: rgba(207,46,46,0.12); color: #ff6464; border: 1px solid rgba(207,46,46,0.25); }
.badge-blue { background: rgba(6,147,227,0.12); color: var(--admin-cyan); border: 1px solid rgba(6,147,227,0.25); }
.badge-orange { background: rgba(255,165,0,0.12); color: #ffa500; border: 1px solid rgba(255,165,0,0.25); }
.badge-gray { background: rgba(255,255,255,0.06); color: var(--admin-text-muted); border: 1px solid var(--admin-border); }

/* ── Action buttons ── */
.admin-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

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

.admin-btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }

.admin-btn-ghost {
  background: rgba(255,255,255,0.06);
  color: var(--admin-text-muted);
  border: 1px solid var(--admin-border);
}

.admin-btn-ghost:hover { background: rgba(255,255,255,0.1); color: var(--admin-text); }

.admin-btn-danger {
  background: rgba(207,46,46,0.12);
  color: #ff6464;
  border: 1px solid rgba(207,46,46,0.25);
}

.admin-btn-danger:hover { background: rgba(207,46,46,0.2); }

/* ── Forms ── */
.admin-form-group {
  margin-bottom: 20px;
}

.admin-form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--admin-text-muted);
  margin-bottom: 8px;
}

.admin-form-group input,
.admin-form-group textarea,
.admin-form-group select {
  width: 100%;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--admin-border);
  border-radius: 10px;
  padding: 12px 16px;
  color: var(--admin-text);
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: all 0.2s ease;
}

.admin-form-group input:focus,
.admin-form-group textarea:focus,
.admin-form-group select:focus {
  border-color: var(--admin-cyan);
  background: rgba(6,147,227,0.06);
  box-shadow: 0 0 0 3px rgba(6,147,227,0.1);
}

.admin-form-group textarea { resize: vertical; min-height: 200px; }

.admin-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

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

.admin-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.admin-toggle input { display: none; }

.admin-toggle-track {
  width: 44px; height: 24px;
  background: rgba(255,255,255,0.1);
  border-radius: 100px;
  position: relative;
  transition: background 0.2s ease;
  border: 1px solid var(--admin-border);
}

.admin-toggle-thumb {
  width: 18px; height: 18px;
  background: #fff;
  border-radius: 50%;
  position: absolute;
  top: 2px; left: 2px;
  transition: transform 0.2s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.admin-toggle input:checked + .admin-toggle-track {
  background: var(--admin-cyan);
  border-color: var(--admin-cyan);
}

.admin-toggle input:checked + .admin-toggle-track .admin-toggle-thumb {
  transform: translateX(20px);
}

/* ── Chart containers ── */
.chart-container {
  position: relative;
  height: 280px;
}

/* ── Rich text editor (basic) ── */
.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 10px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--admin-border);
  border-bottom: none;
  border-radius: 10px 10px 0 0;
}

.editor-btn {
  padding: 6px 10px;
  background: none;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--admin-text-muted);
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.15s;
}

.editor-btn:hover {
  background: rgba(255,255,255,0.08);
  border-color: var(--admin-border);
  color: var(--admin-text);
}

#content-editor {
  width: 100%;
  min-height: 350px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--admin-border);
  border-radius: 0 0 10px 10px;
  padding: 20px;
  color: var(--admin-text);
  font-family: inherit;
  font-size: 0.93rem;
  line-height: 1.7;
  outline: none;
}

#content-editor:focus { border-color: var(--admin-cyan); }

/* ── Analytics ── */
.analytics-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
}

.donut-legend { display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }

.donut-legend-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

.donut-legend-color {
  width: 10px; height: 10px;
  border-radius: 3px;
  margin-right: 8px;
}

/* ── Alert ── */
.admin-alert {
  padding: 12px 16px;
  border-radius: 10px;
  margin-bottom: 16px;
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.admin-alert-success { background: rgba(0,208,132,0.08); border: 1px solid rgba(0,208,132,0.25); color: #00d084; }
.admin-alert-error { background: rgba(207,46,46,0.08); border: 1px solid rgba(207,46,46,0.25); color: #ff6464; }

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

.admin-login-card {
  width: 420px;
  background: rgba(13,13,22,0.9);
  border: 1px solid var(--admin-border);
  border-radius: 20px;
  padding: 48px 44px;
  position: relative;
  z-index: 2;
  box-shadow: 0 32px 80px rgba(0,0,0,0.5);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .admin-sidebar { transform: translateX(-100%); transition: transform 0.3s ease; }
  .admin-sidebar.open { transform: translateX(0); }
  .admin-main { margin-left: 0; }
  .admin-content { padding: 20px; }
  .analytics-grid { grid-template-columns: 1fr; }
  .admin-form-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .admin-stats-grid { grid-template-columns: 1fr 1fr; }
  .admin-content { padding: 16px; }
}