:root {
    color-scheme: light;
    --ink: #1c2733;
    --muted: #667684;
    --line: #d9e1e7;
    --surface: #ffffff;
    --surface-soft: #f5f7f9;
    --primary: #234e70;
    --primary-dark: #183a56;
    --danger: #a83232;
    --success: #247044;
    --warning: #8a5a00;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--surface-soft); font-size: 14px; }
a { color: var(--primary); }
button, input, select, textarea { font: inherit; }

.topbar {
    min-height: 60px;
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 0 24px;
    background: var(--primary);
    color: #fff;
    box-shadow: 0 1px 5px rgb(0 0 0 / 18%);
}
.brand { color: #fff; text-decoration: none; font-weight: 750; font-size: 18px; white-space: nowrap; }
.nav { display: flex; align-items: stretch; gap: 4px; flex: 1; }
.nav a { color: #dce8f1; text-decoration: none; padding: 20px 12px 17px; border-bottom: 3px solid transparent; }
.nav a:hover, .nav a.active { color: #fff; border-bottom-color: #fff; }
.account { display: flex; gap: 12px; align-items: center; white-space: nowrap; }
.account form { margin: 0; }
.link-button { border: 0; background: transparent; color: #fff; text-decoration: underline; cursor: pointer; padding: 0; }

.page { max-width: 1600px; margin: 0 auto; padding: 24px; }
.page-header { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; margin-bottom: 18px; }
.page-header h1 { margin: 0 0 4px; font-size: 25px; }
.page-header p { margin: 0; color: var(--muted); }
.actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.panel, .auth-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 1px 2px rgb(0 0 0 / 5%);
}
.panel { padding: 18px; margin-bottom: 18px; }
.panel.narrow { max-width: 620px; }
.auth-card { max-width: 420px; margin: 9vh auto 0; padding: 28px; }
.auth-card h1 { margin-top: 0; }
.auth-card p { color: var(--muted); }

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 8px 14px;
    border: 1px solid #b9c6d0;
    border-radius: 5px;
    background: #fff;
    color: var(--ink);
    text-decoration: none;
    cursor: pointer;
    font-weight: 650;
}
.button:hover { background: #eef3f6; }
.button.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.button.primary:hover { background: var(--primary-dark); }
.button.danger { color: var(--danger); border-color: #dfbcbc; }
.button.small { min-height: 30px; padding: 5px 9px; font-size: 13px; }

.stack-form { display: grid; gap: 16px; }
.stack-form label, .form-grid label { display: grid; gap: 6px; font-weight: 650; }
input, select, textarea {
    width: 100%;
    min-height: 37px;
    padding: 7px 9px;
    border: 1px solid #b9c6d0;
    border-radius: 4px;
    background: #fff;
    color: var(--ink);
}
input:focus, select:focus, textarea:focus { outline: 2px solid rgb(35 78 112 / 22%); border-color: var(--primary); }
input:disabled, select:disabled, textarea:disabled { background: #edf1f4; color: #72808b; }
textarea { min-height: 74px; resize: vertical; }
.checkbox { display: flex !important; grid-template-columns: none !important; align-items: center; gap: 8px !important; }
.checkbox input { width: auto; min-height: auto; }
.help { font-size: 12px; color: var(--muted); font-weight: 400; }

.form-grid { display: grid; grid-template-columns: repeat(3, minmax(180px, 1fr)); gap: 16px; }
.form-grid .wide { grid-column: 1 / -1; }
.form-section { border-top: 1px solid var(--line); margin-top: 22px; padding-top: 18px; }
.form-section:first-child { border-top: 0; margin-top: 0; padding-top: 0; }
.form-section h2 { font-size: 18px; margin: 0 0 14px; }
.week-grid { display: grid; grid-template-columns: repeat(7, minmax(90px, 1fr)); gap: 10px; }

.filter-bar { display: flex; gap: 12px; align-items: end; flex-wrap: wrap; }
.filter-bar label { display: grid; gap: 5px; font-weight: 650; min-width: 120px; }
.filter-bar .employee-select { min-width: 240px; }
.month-links { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 14px; }
.month-links a { text-decoration: none; border: 1px solid var(--line); background: #fff; border-radius: 4px; padding: 5px 8px; }
.month-links a.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.cards { display: grid; grid-template-columns: repeat(6, minmax(130px, 1fr)); gap: 12px; margin-bottom: 18px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 7px; padding: 13px; }
.card .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.card .value { font-size: 22px; font-weight: 750; margin-top: 3px; }
.value.negative { color: var(--danger); }
.value.positive { color: var(--success); }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 8px 9px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; white-space: nowrap; }
th { position: sticky; top: 0; z-index: 1; background: #e9eff4; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr.weekend { background: #f8fafb; }
tbody tr.public-holiday { background: #fff7df; }
tbody tr.locked { color: #697680; }
td input, td select { min-width: 82px; min-height: 32px; padding: 4px 6px; }
td input.notes { min-width: 180px; }
td select.status { min-width: 155px; }
.number { text-align: right; font-variant-numeric: tabular-nums; }
.badge { display: inline-block; padding: 3px 6px; border-radius: 999px; background: #e5edf3; font-size: 12px; }
.badge.holiday { background: #f6df9f; color: #654600; }
.warning-text { display: block; max-width: 220px; white-space: normal; font-size: 11px; color: var(--warning); margin-top: 3px; }

.alert { padding: 11px 14px; border-radius: 5px; margin-bottom: 15px; border: 1px solid; }
.alert-success { background: #e9f6ee; color: #145631; border-color: #b8dec7; }
.alert-error { background: #faecec; color: #7f2424; border-color: #e6bcbc; }

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

@media (max-width: 1000px) {
    .topbar { flex-wrap: wrap; gap: 8px 16px; padding: 12px 16px; }
    .nav { order: 3; width: 100%; overflow-x: auto; }
    .nav a { padding: 9px 8px 6px; }
    .page { padding: 16px; }
    .cards { grid-template-columns: repeat(2, minmax(130px, 1fr)); }
    .form-grid { grid-template-columns: 1fr 1fr; }
    .week-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 620px) {
    .account span { display: none; }
    .page-header { display: block; }
    .page-header .actions { margin-top: 12px; }
    .cards, .form-grid, .week-grid { grid-template-columns: 1fr; }
}