/* ============================================
   PBD Admin Panel — Design System
   ============================================ */

:root {
    --sidebar-width: 260px;
    --sidebar-collapsed: 0px;
    --topbar-height: 64px;
    --primary: #1e293b;
    --primary-light: #334155;
    --accent: #0ea5e9;
    --accent-dark: #0284c7;
    --gold: #b78103;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg-body: #f1f5f9;
    --bg-card: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --transition: all 0.2s ease;
}

* { box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-body);
    color: var(--text-main);
    margin: 0;
    overflow-x: hidden;
}

/* ─── Sidebar ──────────────────────────────────── */
.sidebar {
    position: fixed;
    top: 0; left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    color: #e2e8f0;
    z-index: 1040;
    transition: var(--transition);
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
}

.sidebar-brand {
    padding: 1.25rem 1.25rem;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    flex-shrink: 0;
}

.sidebar-brand h5 {
    font-size: 0.85rem;
    font-weight: 700;
    color: #fff;
    margin: 0;
    line-height: 1.3;
}

.sidebar-brand small {
    font-size: 0.7rem;
    color: #94a3b8;
    font-weight: 500;
}

.sidebar-nav {
    flex: 1;
    padding: 0.75rem 0;
}

.sidebar-nav .nav-section {
    padding: 0.5rem 1.25rem 0.25rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #64748b;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1.25rem;
    margin: 0.15rem 0.6rem;
    border-radius: var(--radius-sm);
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    background: none;
    width: calc(100% - 1.2rem);
    text-align: left;
}

.sidebar-link i { font-size: 1rem; width: 20px; text-align: center; }
.sidebar-link:hover { color: #fff; background: rgba(255,255,255,0.08); }
.sidebar-link.active { color: #fff; background: var(--accent); font-weight: 600; }

/* ─── Topbar ────────────────────────────────────── */
.topbar {
    position: fixed;
    top: 0; left: var(--sidebar-width);
    right: 0;
    height: var(--topbar-height);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    z-index: 1030;
    transition: var(--transition);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* ─── Main Content ──────────────────────────────── */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--topbar-height);
    padding: 1.5rem;
    min-height: calc(100vh - var(--topbar-height));
    transition: var(--transition);
}

/* ─── Cards ─────────────────────────────────────── */
.card-admin {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.card-admin .card-header {
    background: transparent;
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.25rem;
    font-weight: 600;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-admin .card-body { padding: 1.25rem; }

/* ─── Stat Cards ────────────────────────────────── */
.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 1.25rem;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    width: 48px; height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.stat-value { font-size: 1.5rem; font-weight: 800; color: var(--text-main); line-height: 1; }
.stat-label { font-size: 0.75rem; color: var(--text-muted); font-weight: 500; margin-top: 0.2rem; }

/* ─── Tables ────────────────────────────────────── */
.table-admin {
    width: 100%;
    font-size: 0.8rem;
}

.table-admin thead th {
    background: #f8fafc;
    border-bottom: 2px solid var(--border);
    font-weight: 600;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    padding: 0.75rem 1rem;
}

.table-admin tbody td {
    padding: 0.7rem 1rem;
    vertical-align: middle;
    border-bottom: 1px solid #f1f5f9;
}

.table-admin tbody tr:hover { background: #f8fafc; }

/* ─── Buttons ───────────────────────────────────── */
.btn-admin {
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.45rem 1rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    border: 1px solid transparent;
    cursor: pointer;
}

.btn-admin-primary { background: var(--primary); color: #fff; }
.btn-admin-primary:hover { background: var(--primary-light); }
.btn-admin-accent { background: var(--accent); color: #fff; }
.btn-admin-accent:hover { background: var(--accent-dark); }
.btn-admin-success { background: var(--success); color: #fff; }
.btn-admin-danger { background: var(--danger); color: #fff; }
.btn-admin-outline { background: transparent; border-color: var(--border); color: var(--text-main); }
.btn-admin-outline:hover { background: #f8fafc; }

.btn-admin-sm { font-size: 0.7rem; padding: 0.3rem 0.7rem; }

/* ─── Badges ────────────────────────────────────── */
.badge-admin {
    font-size: 0.68rem;
    font-weight: 600;
    padding: 0.25em 0.6em;
    border-radius: 20px;
}

/* ─── Forms ─────────────────────────────────────── */
.form-admin {
    font-size: 0.8rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.75rem;
    transition: var(--transition);
}

.form-admin:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(14,165,233,0.1);
    outline: none;
}

/* ─── Page Header ───────────────────────────────── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.page-header h4 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0;
}

.page-header p {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin: 0.15rem 0 0;
}

/* ─── Mobile Overlay ────────────────────────────── */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1035;
}

@media (max-width: 991px) {
    .sidebar { left: calc(-1 * var(--sidebar-width)); }
    .sidebar.open { left: 0; }
    .sidebar-overlay.show { display: block; }
    .topbar { left: 0; }
    .main-content { margin-left: 0; }
}

/* ─── Print ─────────────────────────────────────── */
@media print {
    .sidebar, .topbar, .no-print { display: none !important; }
    .main-content { margin: 0 !important; padding: 0 !important; }
    body { background: white !important; }
}

/* ─── Scrollbar ─────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }

/* ─── Loading ───────────────────────────────────── */
.loading-spinner {
    width: 40px; height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }