:root {
    --bg: #f6f5fb;
    --card: #ffffff;
    --text: #2a2438;
    --muted: #8a839c;
    --line: #e8e4f2;
    --primary: #7c5cff;
    --primary-dark: #6344e0;
    --danger: #e5484d;
    --green: #18a058;
    --sidebar: #221b33;
    --sidebar-text: #cfc7e6;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
}

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

.muted { color: var(--muted); }
.green { color: var(--green); }
.gray { color: var(--muted); }
.red { color: var(--danger); }
.nowrap { white-space: nowrap; }

/* 布局 */
.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: 220px;
    flex: 0 0 220px;
    background: var(--sidebar);
    color: var(--sidebar-text);
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand strong { display: block; color: #fff; font-size: 16px; }
.brand small { color: #9b91b8; font-size: 12px; }

.logo {
    width: 36px; height: 36px; border-radius: 10px;
    display: inline-flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #a78bfa, #f0abfc);
    color: #fff; font-weight: 700; font-size: 18px;
}

.menu { display: flex; flex-direction: column; gap: 4px; }
.menu a {
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--sidebar-text);
    transition: background .15s, color .15s;
}
.menu a:hover { background: rgba(255, 255, 255, .08); color: #fff; }
.menu a.active { background: var(--primary); color: #fff; }

.logout {
    margin-top: auto;
    padding: 10px 12px;
    border-radius: 8px;
    color: #f0abfc;
    border: 1px solid rgba(240, 171, 252, .3);
    text-align: center;
}
.logout:hover { background: rgba(240, 171, 252, .1); color: #fff; }

.main { flex: 1; padding: 28px 32px; min-width: 0; }

.page-head {
    display: flex; align-items: flex-start; justify-content: space-between;
    gap: 16px; margin-bottom: 20px;
}
.page-head h1 { margin: 0 0 6px; font-size: 22px; }
.page-head p { margin: 0; }

/* 卡片与统计 */
.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 1px 2px rgba(34, 27, 51, .04);
}
.card h2 { margin: 0 0 14px; font-size: 16px; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat {
    background: var(--card); border: 1px solid var(--line); border-radius: 14px;
    padding: 18px; display: flex; flex-direction: column; gap: 10px;
}
.stat span { color: var(--muted); font-size: 13px; }
.stat strong { font-size: 26px; }

.kv { display: grid; grid-template-columns: 160px 1fr; gap: 10px 16px; margin: 0 0 16px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-all; }

/* 按钮 */
.btn, button {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 9px 16px; border-radius: 9px; border: 1px solid transparent;
    background: var(--primary); color: #fff; font-size: 14px;
    cursor: pointer; font-family: inherit;
}
.btn:hover, button:hover { background: var(--primary-dark); color: #fff; }
.btn.ghost, button.ghost {
    background: transparent; color: var(--text); border-color: var(--line);
}
.btn.ghost:hover, button.ghost:hover { background: #f1edff; color: var(--primary-dark); }
button.danger {
    background: transparent; color: var(--danger); border-color: transparent;
    padding: 4px 8px;
}
button.danger:hover { background: #fdecec; color: var(--danger); }

/* 表格 */
.table-card { padding: 0; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: 13px; background: #faf9fe; }
tr:last-child td { border-bottom: none; }
td.empty { text-align: center; color: var(--muted); padding: 40px; }
.thumb { width: 56px; height: 72px; object-fit: cover; border-radius: 8px; display: block; }
.actions { display: flex; align-items: center; gap: 10px; }
.actions form { margin: 0; }

.badge { padding: 3px 9px; border-radius: 999px; font-size: 12px; }
.badge.on { background: #e7f7ee; color: var(--green); }
.badge.off { background: #f1f0f5; color: var(--muted); }

/* 表单 */
.form { display: flex; flex-direction: column; gap: 16px; max-width: 680px; }
.form label { display: flex; flex-direction: column; gap: 7px; font-weight: 600; }
.form input[type=text], .form input[type=password], .form input[type=number],
.form select, .form textarea {
    width: 100%; padding: 10px 12px; border: 1px solid var(--line);
    border-radius: 9px; font-size: 14px; font-family: inherit; background: #fff;
    color: var(--text);
}
.form input:focus, .form select:focus, .form textarea:focus {
    outline: none; border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(124, 92, 255, .14);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form .checkbox { flex-direction: row; align-items: center; gap: 10px; font-weight: 500; }
.form .checkbox input { width: 18px; height: 18px; accent-color: var(--primary); }
.form button[type=submit] { align-self: flex-start; min-width: 120px; }

.preview img {
    max-width: 220px; max-height: 300px; border-radius: 10px;
    border: 1px solid var(--line); display: block;
}

/* 筛选与分页 */
.filters { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.filters input, .filters select {
    padding: 9px 12px; border: 1px solid var(--line); border-radius: 9px;
    font-size: 14px; background: #fff; color: var(--text);
}
.filters input { min-width: 240px; }

.pager { display: flex; align-items: center; gap: 14px; color: var(--muted); }
.pager a { padding: 7px 14px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }

/* 提示 */
.alert { padding: 12px 16px; border-radius: 10px; margin-bottom: 16px; }
.alert.error { background: #fdecec; color: #b42318; border: 1px solid #f5c2c0; }
.alert.success { background: #e7f7ee; color: #116b3c; border: 1px solid #b7e4c9; }

/* 登录页 */
.login-body {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #ede9fe 0%, #fdf2f8 100%);
    padding: 24px;
}
.login-card {
    width: 100%; max-width: 390px; background: #fff; border-radius: 18px;
    padding: 32px; box-shadow: 0 18px 60px rgba(76, 51, 133, .16);
}
.login-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.login-brand h1 { font-size: 20px; margin: 0; }
.login-card .muted { margin: 0 0 22px; }

@media (max-width: 720px) {
    .layout { flex-direction: column; }
    .sidebar { width: 100%; flex: none; flex-direction: row; align-items: center; flex-wrap: wrap; }
    .menu { flex-direction: row; flex-wrap: wrap; }
    .logout { margin-top: 0; margin-left: auto; }
    .main { padding: 20px; }
    .kv { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
}