/* === Admin Panel CSS === */
:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --radius: 8px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
}

/* === Layout === */
.admin-nav {
    background: var(--gray-900);
    color: #fff;
    padding: 0 24px;
    display: flex;
    align-items: center;
    height: 56px;
    gap: 32px;
}

.admin-nav .brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: #fff;
    text-decoration: none;
    margin-right: 16px;
}

.admin-nav a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 16px 0;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
}

.admin-nav a:hover,
.admin-nav a.active {
    color: #fff;
    border-bottom-color: var(--primary);
}

.admin-nav .nav-right {
    margin-left: auto;
}

.admin-nav .nav-right a {
    color: var(--gray-400);
    font-size: 0.85rem;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px;
}

h1 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--gray-900);
}

/* === Stats Grid === */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    border: 1px solid var(--gray-200);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-top: 4px;
}

/* === Cards === */
.card {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    border: 1px solid var(--gray-200);
}

.card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--gray-800);
}

/* === Tables === */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

thead th {
    text-align: left;
    padding: 10px 12px;
    background: var(--gray-100);
    color: var(--gray-600);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-bottom: 2px solid var(--gray-200);
}

tbody td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-700);
}

tbody tr:hover {
    background: var(--gray-100);
}

/* === Tabs === */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--gray-200);
    margin-bottom: 24px;
}

.tab {
    padding: 10px 20px;
    text-decoration: none;
    color: var(--gray-500);
    font-size: 0.9rem;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: color 0.2s, border-color 0.2s;
}

.tab:hover {
    color: var(--gray-700);
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* === Badges === */
[class^="badge-"] {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: capitalize;
}

.badge-active { background: #d1fae5; color: #065f46; }
.badge-draft { background: var(--gray-200); color: var(--gray-600); }
.badge-closed { background: #fee2e2; color: #991b1b; }
.badge-likert { background: #dbeafe; color: #1e40af; }
.badge-opentext { background: #fef3c7; color: #92400e; }

/* === Buttons === */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    border: 1px solid var(--gray-300);
    background: #fff;
    color: var(--gray-700);
    transition: background 0.2s, border-color 0.2s;
}

.btn:hover { background: var(--gray-100); border-color: var(--gray-400); }

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

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

.btn-sm { padding: 4px 12px; font-size: 0.8rem; }

.copy-btn {
    padding: 3px 10px;
    font-size: 0.75rem;
    border-radius: 4px;
    border: 1px solid var(--gray-300);
    background: #fff;
    color: var(--gray-600);
    cursor: pointer;
    transition: background 0.15s;
}

.copy-btn:hover { background: var(--gray-100); }

/* === Forms === */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 0.9rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

input[type="file"].form-control {
    padding: 6px 8px;
}

/* === Alerts === */
.alert {
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }

/* === Result Bars === */
.result-bar-container {
    margin-bottom: 16px;
}

.result-bar-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.result-bar {
    height: 24px;
    background: var(--gray-200);
    border-radius: 12px;
    overflow: hidden;
}

.result-bar-fill {
    height: 100%;
    border-radius: 12px;
    transition: width 0.5s ease;
}

.result-bar-fill.excellent { background: #10b981; }
.result-bar-fill.good { background: #3b82f6; }
.result-bar-fill.average { background: #f59e0b; }
.result-bar-fill.poor { background: #ef4444; }

/* === Open Responses === */
.open-response {
    padding: 14px 0;
    border-bottom: 1px solid var(--gray-200);
}

.open-response:last-child { border-bottom: none; }

.open-response .meta {
    font-size: 0.8rem;
    color: var(--gray-400);
    margin-top: 6px;
}

/* === Login === */
.login-container {
    max-width: 380px;
    margin: 80px auto;
    padding: 32px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border: 1px solid var(--gray-200);
}

.login-container h2 {
    text-align: center;
    margin-bottom: 24px;
    font-size: 1.3rem;
    color: var(--gray-800);
}

.login-container .btn-primary {
    width: 100%;
    padding: 10px;
    font-size: 0.95rem;
}

/* === Empty State === */
.empty-state {
    text-align: center;
    padding: 32px;
    color: var(--gray-400);
    font-size: 0.95rem;
}

/* === Responsive === */
@media (max-width: 768px) {
    .container { padding: 16px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .stat-card { padding: 14px; }
    .stat-value { font-size: 1.5rem; }
    .admin-nav { padding: 0 12px; gap: 16px; font-size: 0.85rem; }
    .tabs { overflow-x: auto; }
    .tab { padding: 8px 14px; white-space: nowrap; }
    h1 { font-size: 1.3rem; }
    .card { padding: 16px; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .admin-nav { gap: 10px; }
    .login-container { margin: 40px 16px; padding: 24px; }
}