:root {
    --bg: #070b14;
    --card: #0f1728;
    --card-2: #13203a;
    --text: #e6edf7;
    --muted: #7d8aa3;
    --accent: #22d3ee;
    --accent-2: #818cf8;
    --line: rgba(148, 163, 184, 0.14);
    --danger: #fb7185;
    --green: #34d399;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, "PingFang SC", "Helvetica Neue", sans-serif;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    background-image:
        radial-gradient(ellipse at 18% -10%, rgba(34, 211, 238, 0.10), transparent 55%),
        radial-gradient(ellipse at 85% 110%, rgba(129, 140, 248, 0.10), transparent 55%),
        linear-gradient(rgba(148, 163, 184, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.045) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 44px 44px, 44px 44px;
    background-attachment: fixed;
}

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

.sidebar {
    width: 224px; flex-shrink: 0;
    background: rgba(11, 17, 31, 0.85);
    border-right: 1px solid var(--line);
    backdrop-filter: blur(10px);
    padding: 20px 12px;
    display: flex; flex-direction: column;
    position: sticky; top: 0; height: 100vh;
}
.brand {
    font-weight: 800; font-size: 17px; padding: 6px 12px 24px;
    letter-spacing: 1px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
}
.nav-item {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 12px; border-radius: 8px; margin-bottom: 4px;
    color: var(--muted); text-decoration: none; font-size: 14px;
    border: 1px solid transparent;
    transition: all .15s;
}
.nav-item svg { flex-shrink: 0; }
.nav-item:hover { color: var(--text); background: rgba(148, 163, 184, 0.07); }
.nav-item.active {
    color: var(--accent);
    background: rgba(34, 211, 238, 0.10);
    border-color: rgba(34, 211, 238, 0.28);
    box-shadow: 0 0 22px rgba(34, 211, 238, 0.12);
}
.nav-item .tag { margin-left: auto; font-size: 11px; color: var(--muted); font-weight: 400; }

.main { flex: 1; min-width: 0; padding: 24px 28px; }

.bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.bar h1 { font-size: 20px; letter-spacing: .5px; }
.bar .count { color: var(--muted); font-size: 13px; margin-top: 3px; }
.actions { display: flex; gap: 8px; }
.btn {
    border: 1px solid var(--line); background: var(--card); color: var(--text);
    padding: 8px 14px; border-radius: 8px; font-size: 13px; cursor: pointer; text-decoration: none;
    transition: all .15s;
}
.btn:hover { border-color: var(--accent); box-shadow: 0 0 14px rgba(34, 211, 238, 0.15); }
.btn.danger { color: var(--danger); }
.btn.danger:hover { border-color: var(--danger); box-shadow: 0 0 14px rgba(251, 113, 133, 0.15); }

/* ===== 表格 ===== */
.table-wrap {
    background: var(--card); border-radius: 14px; overflow: auto;
    border: 1px solid var(--line);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.35);
}
table { border-collapse: collapse; width: 100%; font-size: 13px; min-width: 860px; }
th, td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { background: rgba(148, 163, 184, 0.05); color: var(--muted); font-weight: 600; position: sticky; top: 0; }
tbody tr { transition: background .12s; }
tbody tr:hover { background: rgba(34, 211, 238, 0.045); }
td.ua { max-width: 260px; overflow: hidden; text-overflow: ellipsis; color: var(--muted); font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace; font-size: 12px; }
td.ip { font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace; color: var(--accent); font-variant-numeric: tabular-nums; }
.empty { padding: 60px 20px; text-align: center; color: var(--muted); }

/* ===== 仪表盘卡片 ===== */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(215px, 1fr)); gap: 16px; }
.stat-card {
    background: linear-gradient(160deg, var(--card), var(--card-2));
    border: 1px solid var(--line);
    border-radius: 14px; padding: 20px;
    position: relative; overflow: hidden;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.28);
}
.stat-card::before {
    content: ''; position: absolute; top: 0; left: 14px; right: 14px; height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: .55;
}
.stat-card .k { display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: 13px; margin-bottom: 10px; letter-spacing: .6px; }
.stat-card .k svg { flex-shrink: 0; color: var(--accent); }
.stat-card .v {
    font-size: 23px; font-weight: 700; display: flex; align-items: center; gap: 9px;
    font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
    color: #fff; text-shadow: 0 0 18px rgba(34, 211, 238, 0.35);
}
.stat-card .v.small { font-size: 16px; font-weight: 600; display: block; font-family: inherit; text-shadow: none; }
.stat-card .sub { color: var(--muted); font-size: 12px; margin-top: 9px; word-break: break-all; }

.dot {
    width: 9px; height: 9px; border-radius: 50%; background: var(--green); flex-shrink: 0;
    animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 5px var(--green); opacity: 1; }
    50% { box-shadow: 0 0 18px var(--green); opacity: .55; }
}

.bar-track { height: 8px; background: rgba(148, 163, 184, 0.14); border-radius: 4px; margin-top: 13px; overflow: hidden; }
.bar-fill {
    height: 100%; border-radius: 4px;
    background: linear-gradient(90deg, var(--accent-2), var(--accent));
    box-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
}

/* ===== 登录框 ===== */
.login {
    max-width: 360px; margin: 14vh auto 0;
    background: linear-gradient(160deg, var(--card), var(--card-2));
    border: 1px solid var(--line); border-radius: 16px; padding: 28px 24px;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
}
.login h1 { font-size: 18px; margin-bottom: 4px; }
.login p { color: var(--muted); font-size: 13px; margin-bottom: 18px; }
.login input {
    width: 100%; padding: 11px 12px; border: 1px solid var(--line); border-radius: 8px;
    font-size: 14px; margin-bottom: 12px; background: rgba(0, 0, 0, 0.25); color: var(--text);
}
.login input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15); }
.login button {
    width: 100%; padding: 11px; border: none; border-radius: 8px; font-size: 14px; cursor: pointer;
    background: linear-gradient(90deg, var(--accent-2), var(--accent)); color: #04121a; font-weight: 700;
    transition: filter .15s;
}
.login button:hover { filter: brightness(1.12); }

/* ===== 移动端 ===== */
@media (max-width: 768px) {
    .layout { flex-direction: column; }
    .sidebar { width: 100%; height: auto; position: static; flex-direction: row; align-items: center; overflow-x: auto; border-right: none; border-bottom: 1px solid var(--line); padding: 10px 12px; }
    .brand { padding: 0 12px 0 0; white-space: nowrap; }
    .sidebar nav { display: flex; gap: 4px; }
    .nav-item { margin-bottom: 0; white-space: nowrap; }
    .main { padding: 16px; }
}