:root {
    --bg: #f5f7fa;
    --card: #fff;
    --text: #1a1a2e;
    --muted: #6b7280;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --success: #059669;
    --danger: #dc2626;
    --warning: #f59e0b;
    --border: #e5e7eb;
    --radius: 8px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}
a {
    color: var(--primary);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* Layout */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem 1rem;
}
nav {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    position: sticky;
    top: 0;
    z-index: 100;
    width: 100%;
    box-sizing: border-box;
}
nav .brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text);
    text-decoration: none;
    flex-shrink: 0;
    margin-right: auto;
}
nav .hamburger {
    display: block;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    color: var(--text);
    line-height: 1;
}
nav .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 0.25rem;
    padding-top: 0.5rem;
    order: 3;
}
nav .nav-links.open {
    display: flex;
}
nav .nav-links a {
    color: var(--muted);
    font-size: 0.9rem;
    padding: 0.5rem 0;
    white-space: nowrap;
}
nav .nav-links a:hover,
nav .nav-links a.active {
    color: var(--primary);
    text-decoration: none;
}
nav .user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    flex-shrink: 0;
    order: 2;
}
nav .user-info img {
    width: 24px;
    height: 24px;
    border-radius: 50%;
}
nav .user-info .user-name {
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
@media (min-width: 768px) {
    nav {
        padding: 0.75rem 2rem;
        flex-wrap: nowrap;
        gap: 2rem;
    }
    nav .brand {
        font-size: 1.25rem;
        margin-right: 0;
    }
    nav .hamburger {
        display: none;
    }
    nav .nav-links {
        display: flex;
        flex-direction: row;
        width: auto;
        gap: 1.5rem;
        padding-top: 0;
        order: 0;
        flex: 1;
    }
    nav .nav-links a {
        font-size: 0.875rem;
        padding: 0.35rem 0;
    }
    nav .user-info {
        gap: 0.75rem;
        font-size: 0.875rem;
        order: 0;
    }
    nav .user-info img {
        width: 28px;
        height: 28px;
    }
    nav .user-info .user-name {
        max-width: none;
    }
}

/* Cards */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1rem;
}
.card h2 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

/* Stats */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1rem;
}
.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
    transition: box-shadow 0.2s;
}
.stat-card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}
.stat-card .number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
}
.stat-card .label {
    font-size: 0.8rem;
    color: var(--muted);
    margin-top: 0.25rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
    transition: all 0.15s;
}
.btn:hover {
    background: #f3f4f6;
    text-decoration: none;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-hover);
}
.btn-success {
    background: var(--success);
    color: #fff;
    border-color: var(--success);
}
.btn-danger {
    background: var(--danger);
    color: #fff;
    border-color: var(--danger);
}
.btn-sm {
    padding: 0.3rem 0.65rem;
    font-size: 0.8rem;
}
.btn-outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
}

/* Tables */
.table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 -1rem;
    padding: 0 1rem;
}
@media (min-width: 768px) {
    .table-wrap {
        margin: 0;
        padding: 0;
    }
}
table {
    width: 100%;
    border-collapse: collapse;
}
th,
td {
    padding: 0.65rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}
th:last-child,
td:last-child {
    white-space: nowrap;
}
.truncate {
    display: block;
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.col-action {
    white-space: nowrap;
}
th:last-child,
td:last-child {
    white-space: nowrap;
}
th {
    font-weight: 600;
    color: var(--muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
tr:hover {
    background: #f9fafb;
}

/* Forms */
.form-group {
    margin-bottom: 0.75rem;
}
.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--muted);
    margin-bottom: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-family: inherit;
}
.form-group textarea {
    resize: vertical;
    min-height: 60px;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}
@media (max-width: 640px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    background: #e5e7eb;
    color: var(--muted);
}
.badge-super,
.badge-super_admin {
    background: #7c3aed;
    color: #fff;
}
.badge-admin {
    background: var(--primary);
    color: #fff;
}
.badge-event_admin {
    background: #0891b2;
    color: #fff;
}
.badge-booth_owner {
    background: #059669;
    color: #fff;
}
.badge-visitor {
    background: #6b7280;
    color: #fff;
}
.badge-event_owner,
.badge-owner {
    background: var(--warning);
    color: #fff;
}
.badge-success {
    background: var(--success);
    color: #fff;
}

/* Utilities */
.flex {
    display: flex;
}
.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}
.flex-wrap {
    flex-wrap: wrap;
    gap: 0.5rem;
}
.mt-1 {
    margin-top: 1rem;
}
.mb-1 {
    margin-bottom: 1rem;
}
.text-muted {
    color: var(--muted);
    font-size: 0.85rem;
}
.text-center {
    text-align: center;
}

/* Alerts */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.875rem;
}
.alert-success {
    background: #ecfdf5;
    border: 1px solid #a7f3d0;
    color: #065f46;
}
.alert-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
}
.alert-info {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: #1e40af;
}

/* Login page */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
}
.login-card {
    text-align: center;
    max-width: 400px;
    width: 100%;
}
.login-card h1 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}
.login-card p {
    margin-bottom: 1.5rem;
}

/* QR */
.qr-container {
    text-align: center;
    padding: 1rem;
}
.qr-container img {
    max-width: 280px;
    width: 100%;
    border: 2px solid var(--border);
    border-radius: var(--radius);
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}
.modal {
    background: var(--card);
    border-radius: var(--radius);
    padding: 1.5rem;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

/* Toast */
.toast {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 300;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    animation: slideIn 0.3s ease;
}
.toast-success {
    background: #059669;
    color: #fff;
}
.toast-error {
    background: #dc2626;
    color: #fff;
}
@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border);
    margin-bottom: 1rem;
}
.tab {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    color: var(--muted);
    transition: all 0.15s;
}
.tab:hover {
    color: var(--text);
}
.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 500;
}

/* Top loading bar — like Instagram/Threads */
#top-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 9999;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s;
}
#top-loader.active {
    opacity: 1;
}
#top-loader .bar {
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        var(--primary),
        #7c3aed,
        #059669,
        var(--primary)
    );
    background-size: 200% 100%;
    animation: loaderSlide 1s ease infinite;
}
@keyframes loaderSlide {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Owner bar */
.owner-bar {
    background: #fef3c7;
    border: 1px solid var(--warning);
    padding: 0.75rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.owner-bar strong {
    color: #92400e;
}

/* Scanner */
.scanner-video {
    width: 100%;
    max-width: 400px;
    border-radius: var(--radius);
    border: 2px solid var(--border);
}