/* 通用后台样式 */
:root {
    color-scheme: light;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    --bg: #eef2f7;
    --surface: #ffffff;
    --surface-alt: #f8fbff;
    --border: #d9e2ec;
    --text: #102a43;
    --muted: #637381;
    --primary: #2563eb;
    --success: #16a34a;
    --warning: #f59e0b;
    --danger: #dc2626;
    --radius: 16px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    background: var(--bg);
    color: var(--text);
}

body {
    font-family: var(--font-family);
}

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

a:hover {
    text-decoration: underline;
}

.page-wrapper {
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 24px;
}

.topbar {
    background: #0f172a;
    color: #fff;
    padding: 20px 24px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.15);
}

.topbar a {
    color: #fff;
}

.topbar .topbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
    padding: 16px 18px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
}

.nav a {
    padding: 10px 14px;
    border-radius: 12px;
    background: #f8fbff;
    color: var(--primary);
    font-weight: 600;
}

.nav a:hover {
    background: rgba(37, 99, 235, 0.12);
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
}

.table-wrapper {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.06);
}

table {
    width: 100%;
    table-layout: fixed;
    border-collapse: collapse;
}

th, td {
    width: 11.1111%;
    padding: 16px 18px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: middle;
}

thead th {
    background: var(--surface-alt);
    font-weight: 700;
}

tbody tr:hover {
    background: #f5f8ff;
}

button,
a.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 18px;
    border-radius: 12px;
    border: none;
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
}

button.secondary,
a.button.secondary {
    background: #f1f5f9;
    color: var(--text);
}

button.danger,
a.button.danger {
    background: var(--danger);
}

input,
select,
textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    font-size: 14px;
    line-height: 1.5;
}

input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
    vertical-align: middle;
    padding: 0;
    border-radius: 4px;
}

label input[type="checkbox"] {
    width: auto;
}

textarea {
    resize: vertical;
}

label {
    display: block;
    margin-top: 16px;
    font-weight: 600;
    color: var(--text);
}

.form-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 24px;
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.08);
}

.container {
    padding-top: 24px;
    padding-bottom: 24px;
}

.bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin-bottom: 24px;
    width: 100%;
}

.bar > * {
    flex: 1 1 180px;
}

.bar select,
.bar input[type="text"],
.bar button,
.bar a.button {
    min-width: 180px;
}

.flash {
    margin: 0 0 24px;
    padding: 18px 22px;
    border-radius: 18px;
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    color: var(--text);
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
}

.flash.success {
    background: #ecfdf5;
    border-color: #a7f3d0;
    color: #166534;
}
.error {
    color: var(--danger);
}

.login-box {
    width: 100%;
    max-width: 420px;
    margin: 80px auto;
    padding: 32px;
    background: var(--surface);
    border-radius: 24px;
    box-shadow: 0 20px 48px rgba(15, 23, 42, 0.18);
    border: 1px solid rgba(15, 23, 42, 0.08);
}

.login-box h1 {
    margin-bottom: 24px;
    font-size: 24px;
}

.login-box input,
.login-box button {
    width: 100%;
}

.login-box button {
    margin-top: 8px;
}

@media (max-width: 900px) {
    .page-wrapper {
        padding: 16px;
    }
    .nav {
        justify-content: center;
    }
    .topbar .topbar-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}