:root {
    --bg: #f5f7fb;
    --panel: #ffffff;
    --panel-soft: #f9fafb;
    --text: #182033;
    --muted: #667085;
    --border: #e4e7ec;
    --primary: #1d4ed8;
    --primary-dark: #1e40af;
    --green-bg: #dcfce7;
    --green-text: #166534;
    --blue-bg: #dbeafe;
    --blue-text: #1e40af;
    --danger: #b42318;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.topbar {
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 24px;
    position: sticky;
    top: 0;
    z-index: 1;
}

.brand {
    font-size: 18px;
    font-weight: 700;
}

.nav {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.nav a {
    border-radius: 8px;
    color: var(--muted);
    padding: 8px 10px;
    text-decoration: none;
}

.nav a.active,
.nav a:hover {
    background: #eef4ff;
    color: var(--primary-dark);
}

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 24px;
}

.login-page {
    align-items: center;
    display: flex;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
}

.login-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 16px 40px rgba(16, 24, 40, 0.08);
    max-width: 420px;
    padding: 28px;
    width: 100%;
}

.login-card h1,
.page-title h1 {
    margin: 0 0 8px;
}

.subtitle {
    color: var(--muted);
    margin: 0 0 20px;
}

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 20px;
    padding: 18px;
}

.stats-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin: 20px 0;
}

.stat-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label,
.field-label {
    color: var(--muted);
    font-size: 13px;
}

.table-wrap {
    overflow-x: auto;
}

table {
    border-collapse: collapse;
    min-width: 900px;
    width: 100%;
}

th,
td {
    border-bottom: 1px solid var(--border);
    padding: 12px 10px;
    text-align: left;
    vertical-align: top;
}

th {
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.badge {
    border-radius: 999px;
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 8px;
}

.badge-checkin {
    background: var(--green-bg);
    color: var(--green-text);
}

.badge-checkout {
    background: var(--blue-bg);
    color: var(--blue-text);
}

.form-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

label {
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

input,
select {
    border: 1px solid var(--border);
    border-radius: 8px;
    font: inherit;
    padding: 10px 11px;
    width: 100%;
}

.actions {
    align-items: end;
    display: flex;
    gap: 10px;
}

.button {
    background: var(--primary);
    border: 0;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    display: inline-block;
    font: inherit;
    font-weight: 700;
    padding: 10px 14px;
    text-align: center;
    text-decoration: none;
}

.button:hover {
    background: var(--primary-dark);
    text-decoration: none;
}

.button.secondary {
    background: #eef2f6;
    color: var(--text);
}

.alert {
    border-radius: 8px;
    margin: 0 0 16px;
    padding: 12px 14px;
}

.alert-error {
    background: #fef3f2;
    color: var(--danger);
}

.detail-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field {
    background: var(--panel-soft);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px;
}

.field-value {
    margin-top: 6px;
    overflow-wrap: anywhere;
}

.pagination {
    align-items: center;
    display: flex;
    gap: 10px;
    justify-content: space-between;
    margin-top: 16px;
}

.muted {
    color: var(--muted);
}

@media (max-width: 800px) {
    .topbar,
    .pagination {
        align-items: flex-start;
        flex-direction: column;
    }

    .stats-grid,
    .form-grid,
    .detail-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 16px;
    }

    table {
        min-width: 760px;
    }
}