:root {
    --sf-primary: #c45a11;
    --sf-primary-dark: #9a460d;
    --sf-sidebar: #1a1a1a;
    --sf-sidebar-hover: #2a2a2a;
    --sf-bg: #f4f5f7;
    --sf-text: #1f2937;
    --sf-muted: #6b7280;
    --sf-border: #e5e7eb;
}

* { box-sizing: border-box; }

body.admin-body {
    margin: 0;
    font-family: "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif;
    color: var(--sf-text);
    background: var(--sf-bg);
}

.admin-shell { min-height: 100vh; }

.admin-sidebar {
    width: 260px;
    background: var(--sf-sidebar);
    color: #fff;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--sf-primary), #e88a3a);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.sidebar-brand strong { display: block; font-size: 15px; }
.sidebar-brand small { color: rgba(255,255,255,0.55); font-size: 12px; }

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sidebar-nav a {
    color: rgba(255,255,255,0.78);
    text-decoration: none;
    padding: 12px 14px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background .15s, color .15s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background: var(--sf-sidebar-hover);
    color: #fff;
}

.sidebar-nav a.active {
    border-left: 3px solid var(--sf-primary);
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.admin-main { min-width: 0; }

.admin-topbar {
    background: #fff;
    border-bottom: 1px solid var(--sf-border);
    padding: 18px 28px;
}

.admin-content { padding: 24px 28px 40px; }

.panel {
    background: #fff;
    border: 1px solid var(--sf-border);
    border-radius: 14px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.panel-header {
    padding: 18px 22px;
    border-bottom: 1px solid var(--sf-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.panel-body { padding: 22px; }

.table-admin th {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--sf-muted);
    white-space: nowrap;
}

.table-admin td { vertical-align: middle; }

.thumb-sm {
    width: 56px;
    height: 56px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--sf-border);
    background: #fafafa;
}

.thumb-placeholder {
    width: 56px;
    height: 56px;
    border-radius: 8px;
    background: #eee;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #aaa;
}

.status-badge {
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 999px;
    font-weight: 600;
}

.status-active { background: #dcfce7; color: #166534; }
.status-hidden { background: #f3f4f6; color: #4b5563; }
.status-published { background: #dbeafe; color: #1d4ed8; }
.status-draft { background: #fef3c7; color: #92400e; }

.btn-primary {
    background: var(--sf-primary);
    border-color: var(--sf-primary);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--sf-primary-dark);
    border-color: var(--sf-primary-dark);
}

.btn-outline-primary {
    color: var(--sf-primary);
    border-color: var(--sf-primary);
}

.btn-outline-primary:hover {
    background: var(--sf-primary);
    border-color: var(--sf-primary);
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top right, rgba(196,90,17,.18), transparent 40%), #111;
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: #fff;
    border-radius: 18px;
    padding: 36px 32px;
    box-shadow: 0 20px 60px rgba(0,0,0,.35);
}

.login-logo {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--sf-primary), #e88a3a);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin-bottom: 16px;
}

.form-label { font-weight: 600; font-size: 14px; }

.image-preview {
    max-width: 220px;
    max-height: 160px;
    border-radius: 10px;
    border: 1px solid var(--sf-border);
    object-fit: cover;
}

.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--sf-muted);
}

.empty-state i { font-size: 48px; margin-bottom: 12px; display: block; }

@media (max-width: 991px) {
    .admin-shell { flex-direction: column; }
    .admin-sidebar {
        width: 100%;
        height: auto;
        position: static;
    }
    .sidebar-nav { flex-direction: row; flex-wrap: wrap; }
}