:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --success: #16a34a;
    --warning: #f59e0b;
    --danger: #dc2626;
    --info: #0891b2;
    --surface: #f1f5f9;
    --card: #ffffff;
    --text: #1e293b;
    --muted: #64748b;
    --border: #e2e8f0;
    --navbar-bg: #0f172a;
    --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
    --radius: 0.5rem;
}

body {
    background-color: var(--surface);
    color: var(--text);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navbar */
.navbar {
    background-color: var(--navbar-bg) !important;
    box-shadow: var(--shadow-md);
    padding: 0.6rem 0;
}
.navbar-brand {
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: -0.02em;
}
.navbar .nav-link { font-size: 0.9rem; }
.navbar .nav-link:hover { color: rgba(255,255,255,0.95) !important; }
.navbar .badge { font-size: 0.7rem; vertical-align: middle; }

/* Breadcrumbs */
.breadcrumb-wrapper {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 0.6rem 0;
}
.breadcrumb { margin-bottom: 0; font-size: 0.85rem; }
.breadcrumb-item a { color: var(--primary); text-decoration: none; }
.breadcrumb-item.active { color: var(--muted); }

/* Cards */
.card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.card-header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.25rem;
    font-weight: 600;
}

/* Tables */
.table { margin-bottom: 0; }
.table thead th {
    background: var(--navbar-bg);
    color: white;
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.75rem;
    border: none;
    white-space: nowrap;
}
.table tbody td {
    padding: 0.7rem 0.75rem;
    vertical-align: middle;
    font-size: 0.9rem;
}
.table-hover tbody tr:hover { background-color: #eef2ff; }

/* Status rows */
.row-expired { background-color: #fef2f2 !important; }
.row-expired:hover { background-color: #fee2e2 !important; }
.row-expiring { background-color: #fffbeb !important; }
.row-expiring:hover { background-color: #fef3c7 !important; }

/* Badges */
.badge { font-weight: 500; font-size: 0.78rem; padding: 0.35em 0.65em; border-radius: 0.35rem; }
.badge-admin { background-color: var(--danger); }
.badge-manager { background-color: var(--warning); color: #1e293b; }
.badge-user { background-color: var(--info); }
.badge-expired { background-color: var(--danger); }
.badge-expiring { background-color: var(--warning); color: #1e293b; }
.badge-active { background-color: var(--success); }
.badge-rule { background-color: #475569; }
.badge-category { background-color: #0ea5e9; }
.badge-upload { background-color: var(--success); }
.badge-download { background-color: var(--primary); }
.badge-update { background-color: var(--warning); color: #1e293b; }
.badge-delete { background-color: var(--danger); }
.badge-file-type { background-color: #6366f1; font-size: 0.7rem; letter-spacing: 0.05em; }

/* Buttons */
.btn { border-radius: 0.4rem; font-size: 0.9rem; font-weight: 500; }
.btn-primary { background-color: var(--primary); border-color: var(--primary); }
.btn-primary:hover { background-color: var(--primary-hover); border-color: var(--primary-hover); }
.btn-success { background-color: var(--success); border-color: var(--success); }

/* Action buttons (table) */
.action-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 32px; height: 32px; border-radius: 0.35rem;
    color: var(--muted); text-decoration: none; transition: all 0.15s;
    font-size: 0.95rem;
}
.action-btn:hover { color: var(--primary); background: #eef2ff; }
.action-btn.delete:hover { color: var(--danger); background: #fef2f2; }

/* Card options (categories/rules) */
.card-option {
    cursor: pointer;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    padding: 0.7rem 1rem;
    text-align: center;
    transition: all 0.2s;
    margin-bottom: 0.75rem;
    background: var(--card);
    font-weight: 500;
    font-size: 0.9rem;
    user-select: none;
}
.card-option:hover { border-color: var(--primary); background: #f0f5ff; }
.card-option.selected { background: #dbeafe; border-color: var(--primary); color: var(--primary); }
.card-option input[type="checkbox"],
.card-option input[type="radio"] { display: none; }
.card-option label { margin-bottom: 0; cursor: pointer; font-weight: 600; }

/* Category filter pills */
.filter-pill {
    display: inline-block;
    padding: 0.4rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 2rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.15s;
    background: var(--card);
    margin: 0.2rem;
}
.filter-pill:hover { border-color: var(--primary); }
.filter-pill.active { background: var(--primary); color: white; border-color: var(--primary); }
.filter-pill input { display: none; }

/* Forms */
.form-label { font-weight: 500; font-size: 0.9rem; margin-bottom: 0.3rem; color: var(--text); }
.form-label.required::after { content: " *"; color: var(--danger); }
.form-control:focus, .form-select:focus { border-color: var(--primary); box-shadow: 0 0 0 0.2rem rgba(37,99,235,.15); }
.form-text { font-size: 0.8rem; color: var(--muted); }

/* Page header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}
.page-header h1 { font-size: 1.4rem; font-weight: 700; margin: 0; }

/* Empty state */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--muted);
}
.empty-state i { font-size: 3rem; margin-bottom: 1rem; display: block; opacity: 0.4; }
.empty-state p { font-size: 1rem; margin: 0; }

/* Footer */
.footer {
    margin-top: auto;
    padding: 1rem 0;
    text-align: center;
    font-size: 0.8rem;
    color: var(--muted);
    border-top: 1px solid var(--border);
    background: var(--card);
}

/* Auth pages */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
}
.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 2.5rem;
}
.auth-card h1 { font-size: 1.5rem; font-weight: 700; color: var(--text); margin-bottom: 0.3rem; }
.auth-card .subtitle { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.5rem; }

/* Preview bar */
.preview-bar {
    background: var(--navbar-bg);
    color: white;
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.preview-bar .file-title { font-weight: 600; font-size: 0.95rem; }
.preview-bar .btn { font-size: 0.85rem; }

/* Responsive */
@media (max-width: 768px) {
    .page-header { flex-direction: column; gap: 0.75rem; align-items: stretch; }
    .page-header .btn { width: 100%; }
    .table { font-size: 0.82rem; }
    .action-btn { width: 28px; height: 28px; font-size: 0.85rem; }
}