:root {
    color-scheme: light;
    --bg: #f4f6fa;
    --card: #fff;
    --text: #172033;
    --muted: #667085;
    --line: #e4e7ec;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger: #b42318;
    --ok: #067647;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 14px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.topbar {
    min-height: 58px;
    padding: 10px 24px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.brand { font-size: 18px; font-weight: 700; }
.topbar nav { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.layout { max-width: 1200px; margin: 0 auto; padding: 24px; }
.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 18px;
}
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 18px; }
.stat strong { display: block; font-size: 28px; }
.muted { color: var(--muted); }
.flash { padding: 11px 14px; border-radius: 8px; margin-bottom: 12px; }
.flash.success { background: #ecfdf3; color: var(--ok); }
.flash.error { background: #fef3f2; color: var(--danger); }
.flash.info { background: #eff8ff; color: #175cd3; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
button, .button {
    display: inline-flex;
    min-height: 36px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--primary);
    border-radius: 8px;
    padding: 7px 13px;
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    font: inherit;
}
button:hover, .button:hover { background: var(--primary-dark); text-decoration: none; }
button.secondary, .button.secondary { background: #fff; color: var(--primary); }
form.inline { display: inline; }
label { display: block; margin: 12px 0 5px; font-weight: 600; }
input, select, textarea {
    width: 100%;
    min-height: 40px;
    border: 1px solid #cdd5df;
    border-radius: 8px;
    padding: 8px 10px;
    background: #fff;
    font: inherit;
}
textarea { min-height: 90px; resize: vertical; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 18px; }
.full { grid-column: 1 / -1; }
.help { color: var(--muted); font-size: 12px; margin-top: 4px; }
.mono { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; word-break: break-all; }
.token-box { padding: 10px; border: 1px dashed var(--primary); border-radius: 8px; background: #eff8ff; word-break: break-all; }
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-card { width: min(420px, 100%); background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 28px; }
.login-card h1 { margin-top: 0; }
@media (max-width: 720px) {
    .layout { padding: 14px; }
    .form-grid { grid-template-columns: 1fr; }
    .full { grid-column: auto; }
    table { display: block; overflow-x: auto; white-space: nowrap; }
}