:root {
    color-scheme: light;
    --primary: #4f6ef7;
    --primary-dark: #3f5ce0;
    --bg: #f4f6fb;
    --card: #ffffff;
    --text: #1f2430;
    --muted: #8a90a0;
    --border: #e6e9f2;
    --danger: #ef4444;
    --topbar-bg: rgba(255, 255, 255, .9);
    --surface: #f8f9fc;
    --hover: #fafbfe;
    --tag-bg: #f0f2f7;
    --code-bg: #eef0f5;
    --ok-bg: #effaf4;
    --ok-fg: #1a7f47;
    --ok-border: #bce3cb;
    --err-bg: #fef1f0;
    --radius: 12px;
    --sidebar-w: 220px;
}

/* 浅色主题：手动强制（显式声明，避免被系统深色带偏） */
:root[data-theme="light"] {
    color-scheme: light;
    --primary: #4f6ef7;
    --primary-dark: #3f5ce0;
    --bg: #f4f6fb;
    --card: #ffffff;
    --text: #1f2430;
    --muted: #8a90a0;
    --border: #e6e9f2;
    --danger: #ef4444;
    --topbar-bg: rgba(255, 255, 255, .9);
    --surface: #f8f9fc;
    --hover: #fafbfe;
    --tag-bg: #f0f2f7;
    --code-bg: #eef0f5;
    --ok-bg: #effaf4;
    --ok-fg: #1a7f47;
    --ok-border: #bce3cb;
    --err-bg: #fef1f0;
}

/* 深色主题：跟随系统（仅在未手动指定主题时生效） */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        color-scheme: dark;
        --primary: #6d85ff;
        --primary-dark: #5870ff;
        --bg: #0f131d;
        --card: #1a2031;
        --text: #e7eaf2;
        --muted: #8b93a7;
        --border: #2a3142;
        --danger: #f87171;
        --topbar-bg: rgba(15, 19, 29, .9);
        --surface: #141a28;
        --hover: #1f2739;
        --tag-bg: #262e42;
        --code-bg: #2a3142;
        --ok-bg: #12301f;
        --ok-fg: #4ade80;
        --ok-border: #1f5138;
        --err-bg: #3a1d24;
    }
}

/* 深色主题：手动强制 */
:root[data-theme="dark"] {
    color-scheme: dark;
    --primary: #6d85ff;
    --primary-dark: #5870ff;
    --bg: #0f131d;
    --card: #1a2031;
    --text: #e7eaf2;
    --muted: #8b93a7;
    --border: #2a3142;
    --danger: #f87171;
    --topbar-bg: rgba(15, 19, 29, .9);
    --surface: #141a28;
    --hover: #1f2739;
    --tag-bg: #262e42;
    --code-bg: #2a3142;
    --ok-bg: #12301f;
    --ok-fg: #4ade80;
    --ok-border: #1f5138;
    --err-bg: #3a1d24;
}
* { 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); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

.admin { display: flex; min-height: 100vh; }

/* 侧边栏 */
.sidebar {
    width: var(--sidebar-w); background: var(--card); border-right: 1px solid var(--border);
    position: fixed; top: 0; bottom: 0; left: 0; display: flex; flex-direction: column; z-index: 60;
    transition: transform .2s;
}
.logo { display: flex; align-items: center; gap: 10px; padding: 20px 20px 16px; border-bottom: 1px solid var(--border); }
.logo-mark { width: 36px; height: 36px; border-radius: 10px; background: linear-gradient(135deg, #4f6ef7, #8b5cf6); color: #fff; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.logo-text { font-weight: 700; font-size: 16px; }
.menu { padding: 10px; display: flex; flex-direction: column; gap: 3px; flex: 1; }
.menu a {
    display: flex; align-items: center; gap: 10px; padding: 11px 12px;
    border-radius: 10px; font-size: 14px; color: var(--text); transition: .12s;
}
.menu a:hover { background: var(--hover); }
.menu a.active { background: rgba(79, 110, 247, .1); color: var(--primary); font-weight: 600; }
.menu-ico { font-size: 16px; width: 20px; text-align: center; }
.sidebar-foot { padding: 12px 20px 20px; border-top: 1px solid var(--border); font-size: 13px; }
.sidebar-foot a { color: var(--muted); }
.sidebar-foot a:hover { color: var(--primary); }

/* 主区域 */
.main { flex: 1; margin-left: var(--sidebar-w); min-width: 0; }
.top {
    height: 60px; background: var(--topbar-bg); backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 14px;
    padding: 0 20px; position: sticky; top: 0; z-index: 40;
}
.menu-toggle { display: none; border: 0; background: transparent; font-size: 20px; cursor: pointer; color: var(--text); }
.top-title { font-weight: 700; font-size: 16px; }
.top-user { margin-left: auto; display: flex; align-items: center; gap: 10px; font-size: 14px; }
.avatar { width: 30px; height: 30px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 13px; }
.uname { font-weight: 600; }
.role { font-size: 12px; color: var(--muted); }
.logout { color: var(--muted); font-size: 13px; }
.logout:hover { color: var(--danger); }
.content { padding: 20px; }

/* 卡片 */
.panel { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; margin-bottom: 16px; }
.panel-head { font-weight: 700; font-size: 15px; margin-bottom: 14px; }
.panel-head.sub { font-size: 14px; margin: 18px 0 6px; padding-top: 12px; border-top: 1px dashed var(--border); }
.panel-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }

/* 统计 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 16px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.stat-num { font-size: 26px; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 13px; color: var(--muted); margin-top: 4px; }

/* 提示 */
.alert { background: var(--ok-bg); color: var(--ok-fg); border: 1px solid var(--ok-border); padding: 12px 14px; border-radius: 10px; margin-bottom: 14px; font-size: 14px; }
.muted { color: var(--muted); }
.center { text-align: center; }
.ok-text { color: var(--ok-fg); }

/* 工具栏 */
.toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.toolbar-actions { margin-left: auto; display: flex; gap: 8px; }
.filter { display: flex; gap: 8px; flex-wrap: wrap; }

/* 按钮 */
.btn {
    display: inline-flex; align-items: center; gap: 6px; height: 38px; padding: 0 15px;
    border: 1px solid var(--border); background: var(--card); border-radius: 10px; font-size: 14px;
    cursor: pointer; font-weight: 500; transition: .15s; color: var(--text);
}
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; }
.theme-toggle { width: 38px; padding: 0; justify-content: center; font-size: 16px; }
body { transition: background-color .25s ease, color .25s ease; }

/* 表格 */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
.table thead th { background: var(--surface); font-weight: 600; font-size: 13px; color: var(--muted); }
.table tbody tr:hover { background: var(--hover); }
.ops form { display: inline; }
.ops a, .ops button { display: inline-block; margin-right: 8px; padding: 0; border: 0; background: transparent; color: var(--muted); font: inherit; font-size: 13px; cursor: pointer; }
.ops a:hover, .ops button:hover { color: var(--primary); }
.ops a.danger:hover, .ops button.danger:hover { color: var(--danger); }
.favicon-sm { width: 26px; height: 26px; border-radius: 7px; display: inline-flex; align-items: center; justify-content: center; color: #fff; font-size: 12px; font-weight: 700; position: relative; overflow: hidden; }
.favicon-img-sm { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: contain; padding: 2px; border-radius: 7px; background: var(--surface); image-rendering: auto; }
.favicon-img-sm.favicon-fail { display: none; }
.favicon-text-sm { position: relative; z-index: 1; }
.favicon-img-sm:not(.favicon-fail) ~ .favicon-text-sm { display: none; }
.tag { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; background: var(--tag-bg); color: var(--text); }
.tag-admin { background: rgba(79, 110, 247, .12); color: var(--primary); }
.tag-on { background: var(--ok-bg); color: var(--ok-fg); }
.tag-off { background: var(--err-bg); color: var(--danger); }

/* 表单 */
.form { max-width: 640px; }
.form-narrow { max-width: 420px; }
.form-row { margin-bottom: 14px; }
.form-row label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.form-row .check { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.form-row .check input { width: auto; height: auto; }
.form input, .form select, .form textarea {
    width: 100%; min-height: 40px; border: 1px solid var(--border); border-radius: 9px;
    padding: 8px 12px; font-size: 14px; outline: none; background: var(--card); font-family: inherit;
}
.form input:focus, .form select:focus, .form textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 110, 247, .1); }
.form textarea { resize: vertical; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-btns { margin-top: 8px; }
.logo-preview { width: 60px; height: 60px; object-fit: contain; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.form-panel { border-left: 3px solid var(--primary); }

/* 版本信息 */
.ver-list { display: flex; flex-direction: column; gap: 10px; }
.ver-item { display: flex; justify-content: space-between; align-items: center; padding: 12px 14px; background: var(--surface); border-radius: 10px; font-size: 14px; }
.ver-item b { font-size: 15px; }
.tip-box { background: var(--surface); border-radius: 10px; padding: 14px; font-size: 14px; color: var(--muted); margin-bottom: 14px; }
.tip-box p { margin: 6px 0; }
.tip-box code { background: var(--code-bg); padding: 1px 6px; border-radius: 5px; font-size: 13px; color: var(--danger); }

/* 响应式 */
@media (max-width: 900px) {
    .panel-grid { grid-template-columns: 1fr; }
    .stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); box-shadow: 0 0 40px rgba(0,0,0,.15); }
    .main { margin-left: 0; }
    .menu-toggle { display: block; }
    .top { padding: 0 14px; }
    .content { padding: 14px; }
    .two-col { grid-template-columns: 1fr; }
    .toolbar-actions { margin-left: 0; width: 100%; }
    .toolbar-actions .btn { flex: 1; justify-content: center; }
}