:root {
    color-scheme: light;
    --ink: #17202a;
    --muted: #667085;
    --line: #d9dee7;
    --panel: #ffffff;
    --bg: #f3f5f8;
    --primary: #146c94;
    --primary-dark: #0d4f6d;
    --danger: #b42318;
    --success: #067647;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
    font-size: 15px;
}
.topbar {
    min-height: 58px;
    padding: 0 28px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.brand { font-size: 18px; font-weight: 700; }
.nav { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.nav a { color: var(--primary-dark); text-decoration: none; }
.user-name { color: var(--muted); }
.inline-form { display: inline; }
.link-button {
    border: 0;
    background: transparent;
    color: var(--primary-dark);
    cursor: pointer;
    padding: 0;
    font: inherit;
}
.container { max-width: 1240px; margin: 0 auto; padding: 28px; }
.page-title { margin: 0 0 22px; font-size: 25px; }
.subtitle { color: var(--muted); margin: -12px 0 22px; }
.panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 22px;
    margin-bottom: 20px;
}
.grid { display: grid; gap: 20px; grid-template-columns: repeat(12, minmax(0, 1fr)); }
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }
.metric { display: flex; justify-content: space-between; align-items: center; }
.metric-value { font-size: 30px; font-weight: 700; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 15px; }
.form-grid .full { grid-column: 1 / -1; }
label { display: block; margin-bottom: 6px; font-weight: 600; }
input, select, textarea, button {
    width: 100%;
    min-height: 40px;
    padding: 8px 10px;
    border: 1px solid var(--line);
    border-radius: 4px;
    font: inherit;
}
textarea { min-height: 82px; resize: vertical; }
button {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    font-weight: 600;
}
button:hover { background: var(--primary-dark); }
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: auto;
    min-height: 40px;
    padding: 8px 13px;
    border: 1px solid var(--primary);
    border-radius: 4px;
    background: var(--primary);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
}
.button-secondary { background: #fff; color: var(--primary-dark); }
.button-danger { background: var(--danger); border-color: var(--danger); }
.button-small { width: auto; min-height: 32px; padding: 5px 10px; }
.actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.notice { padding: 12px 14px; border-radius: 4px; margin-bottom: 18px; }
.notice-success { background: #ecfdf3; color: var(--success); border: 1px solid #abefc6; }
.notice-error { background: #fef3f2; color: var(--danger); border: 1px solid #fecdca; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { padding: 11px 10px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
th { background: #f8fafc; color: var(--muted); font-size: 13px; }
.status { font-size: 12px; padding: 3px 7px; border-radius: 10px; background: #eef2f6; }
.status.pending { background: #fff4e5; color: #b54708; }
.status.confirmed, .status.normal, .status.active { background: #ecfdf3; color: var(--success); }
.status.rejected, .status.late, .status.early_leave { background: #fef3f2; color: var(--danger); }
.login-wrap { max-width: 430px; margin: 8vh auto; }
.login-wrap .panel { padding: 30px; }
.qr-layout { display: grid; grid-template-columns: minmax(280px, 430px) minmax(280px, 1fr); gap: 28px; align-items: start; }
.qr-box { min-height: 310px; display: flex; align-items: center; justify-content: center; border: 1px dashed var(--line); background: #fff; }
#qr-code { width: 230px; height: 230px; }
.qr-meta { color: var(--muted); line-height: 1.8; }
.empty { color: var(--muted); padding: 22px 0; text-align: center; }
.checkin-result { font-size: 21px; font-weight: 700; margin: 12px 0 20px; }
.checkin-result.success { color: var(--success); }
.checkin-result.error { color: var(--danger); }
.muted { color: var(--muted); }
.right { text-align: right; }
.center { text-align: center; }
@media (max-width: 780px) {
    .topbar { padding: 12px 16px; align-items: flex-start; flex-direction: column; }
    .container { padding: 18px 14px; }
    .form-grid, .qr-layout { grid-template-columns: 1fr; }
    .col-4, .col-6, .col-8 { grid-column: span 12; }
}