:root {
    --side-bg: #161c2d;
    --side-hover: #232b42;
    --side-active: #4f46e5;
    --brand: #4f46e5;
    --brand2: #7c3aed;
    --text: #1f2937;
    --muted: #6b7280;
    --line: #e5e7eb;
    --bg: #f4f6fb;
    --ok: #16a34a;
    --danger: #dc2626;
    --radius: 10px;
}

* { box-sizing: border-box; }

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

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.sidebar {
    width: 220px;
    background: var(--side-bg);
    color: #c7cde0;
    flex: 0 0 220px;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}
.sidebar .logo {
    padding: 20px 22px;
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.sidebar .logo small { display: block; font-weight: 400; color: #8b93ad; font-size: 12px; margin-top: 4px; }
.sidebar nav { padding: 12px 10px; flex: 1; }
.sidebar nav a {
    display: flex; align-items: center; gap: 10px;
    padding: 11px 14px; border-radius: 8px; color: #c7cde0;
    font-size: 14px; margin-bottom: 4px;
}
.sidebar nav a:hover { background: var(--side-hover); text-decoration: none; color: #fff; }
.sidebar nav a.active { background: var(--side-active); color: #fff; }
.sidebar .foot { padding: 14px 22px; font-size: 12px; color: #6b7280; border-top: 1px solid rgba(255,255,255,.08); }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
    height: 60px; background: #fff; border-bottom: 1px solid var(--line);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 24px; position: sticky; top: 0; z-index: 5;
}
.topbar h1 { font-size: 17px; margin: 0; font-weight: 600; }
.topbar .who { color: var(--muted); font-size: 13px; }
.topbar .who a { margin-left: 12px; }

.content { padding: 22px 24px 40px; }

/* 卡片 */
.card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 20px; margin-bottom: 18px;
}
.card h2 { margin: 0 0 16px; font-size: 15px; font-weight: 600; }

/* 统计块 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 18px; }
.stat {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 18px 20px;
}
.stat .n { font-size: 26px; font-weight: 700; }
.stat .l { color: var(--muted); font-size: 13px; margin-top: 6px; }

/* 表格 */
table { width: 100%; border-collapse: collapse; }
th, td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--line); font-size: 13.5px; vertical-align: middle; }
th { color: var(--muted); font-weight: 600; background: #fafbfd; }
tr:hover td { background: #fafbff; }
.table-wrap { overflow-x: auto; }

/* 表单 */
label { display: block; font-size: 13px; color: #374151; margin: 12px 0 5px; }
input[type=text], input[type=password], input[type=number], input[type=url], select, textarea {
    width: 100%; padding: 9px 12px; border: 1px solid #d1d5db; border-radius: 8px;
    font-size: 14px; outline: none; font-family: inherit; background: #fff;
}
input:focus, select:focus, textarea:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(79,70,229,.12); }
textarea { min-height: 100px; resize: vertical; }
.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row > div { flex: 1; min-width: 200px; }
.hint { color: var(--muted); font-size: 12px; margin-top: 5px; }

/* 按钮 */
.btn {
    display: inline-block; padding: 9px 18px; border-radius: 8px; border: 0;
    background: linear-gradient(135deg, var(--brand), var(--brand2)); color: #fff;
    font-size: 14px; cursor: pointer; text-decoration: none; white-space: nowrap;
}
.btn:hover { opacity: .92; text-decoration: none; }
.btn.ghost { background: #fff; border: 1px solid var(--line); color: var(--text); }
.btn.sm { padding: 5px 11px; font-size: 12.5px; }
.btn.danger { background: #fee2e2; color: var(--danger); }
.btn.green { background: #dcfce7; color: var(--ok); }

/* 徽标 */
.badge { display: inline-block; padding: 2px 9px; border-radius: 20px; font-size: 12px; }
.badge.on { background: #dcfce7; color: var(--ok); }
.badge.off { background: #f3f4f6; color: var(--muted); }
.badge.win { background: #e0e7ff; color: #4338ca; }
.badge.android { background: #dcfce7; color: #15803d; }
.badge.other { background: #fef3c7; color: #b45309; }
.badge.force { background: #fee2e2; color: var(--danger); }

/* 提示条 */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 13.5px; }
.alert.ok { background: #ecfdf5; border: 1px solid #a7f3d0; color: #047857; }
.alert.err { background: #fef2f2; border: 1px solid #fecaca; color: #b91c1c; }

.muted { color: var(--muted); }
.code { background: #f3f4f6; padding: 2px 7px; border-radius: 5px; font-family: Consolas, Menlo, monospace; font-size: 12.5px; }
.actions form { display: inline; }
.empty { text-align: center; color: var(--muted); padding: 40px 0; }

/* 登录页 */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #1f2540, #2d3a63); padding: 24px; }
.login-card { width: 100%; max-width: 380px; background: #fff; border-radius: 16px;
    box-shadow: 0 24px 60px rgba(0,0,0,.35); padding: 34px 30px; }
.login-card h1 { margin: 0 0 4px; font-size: 20px; }
.login-card p.sub { color: var(--muted); margin: 0 0 22px; font-size: 13px; }
.login-card button { width: 100%; margin-top: 20px; padding: 12px; }

@media (max-width: 820px) {
    .stats { grid-template-columns: repeat(2, 1fr); }
    .sidebar { width: 64px; flex: 0 0 64px; }
    .sidebar .logo small, .sidebar nav a span.txt, .sidebar .foot { display: none; }
    .sidebar nav a { justify-content: center; }
}