/* ============================================================
   节点监控面板 · 共享设计系统
   风格：现代极简（flat + 柔和层次），亮/暗双主题
   ============================================================ */

/* ---------- 设计令牌（亮色） ---------- */
:root {
  --bg: #f5f6fa;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --text: #0f172a;
  --text-2: #475569;
  --muted: #94a3b8;
  --border: #e7eaf1;
  --border-strong: #d8dde8;
  --primary: #4f46e5;
  --primary-weak: #eef2ff;
  --primary-text: #ffffff;
  --green: #10b981;
  --green-weak: #ecfdf5;
  --green-text: #047857;
  --amber: #f59e0b;
  --amber-weak: #fffbeb;
  --amber-text: #b45309;
  --red: #ef4444;
  --red-weak: #fef2f2;
  --red-text: #dc2626;
  --track: #e9edf3;
  --shadow: 0 1px 2px rgba(15,23,42,.04), 0 10px 28px rgba(15,23,42,.06);
  --shadow-hover: 0 4px 10px rgba(15,23,42,.06), 0 18px 40px rgba(15,23,42,.10);
  --radius: 16px;
  --radius-sm: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --bt-accent: #1e9fff;   /* 宝塔面板主色（用于服务器数据模块强调） */
}

/* ---------- 暗色主题 ---------- */
[data-theme="dark"] {
  --bg: #0b1120;
  --surface: #111827;
  --surface-2: #0f172a;
  --text: #e5e7eb;
  --text-2: #9ca3af;
  --muted: #6b7280;
  --border: #1f2937;
  --border-strong: #2b3648;
  --primary: #818cf8;
  --primary-weak: #1e1b4b;
  --primary-text: #0b1120;
  --green: #34d399;
  --green-weak: rgba(52,211,153,.12);
  --green-text: #6ee7b7;
  --amber: #fbbf24;
  --amber-weak: rgba(251,191,36,.12);
  --amber-text: #fcd34d;
  --red: #f87171;
  --red-weak: rgba(248,113,113,.12);
  --red-text: #fca5a5;
  --track: #1f2937;
  --bt-accent: #38aaff;   /* 暗色下提亮，保证对比度 */
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 28px rgba(0,0,0,.45);
  --shadow-hover: 0 4px 12px rgba(0,0,0,.5), 0 18px 44px rgba(0,0,0,.55);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 26px;
  transition: background .3s ease, color .3s ease;
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- 顶部 / 标题 ---------- */
.topbar, .wrap { max-width: 1200px; margin: 0 auto; }
.topbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.page-title { font-size: 21px; font-weight: 700; letter-spacing: -.2px; }
.page-sub { font-size: 13px; color: var(--muted); margin-top: 6px; display: flex; align-items: center; }
.page-sub .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); margin-right: 7px; animation: pulse 2s infinite; box-shadow: 0 0 0 3px var(--green-weak); }
.updated { margin-left: 8px; color: var(--muted); }
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .35; transform: scale(.8); } }

.head-flex { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; gap: 12px; flex-wrap: wrap; }
h1 { font-size: 20px; font-weight: 700; letter-spacing: -.2px; }

/* 主题切换按钮 */
.theme-toggle {
  flex-shrink: 0; width: 38px; height: 38px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font-size: 17px; cursor: pointer; transition: .15s; display: grid; place-items: center;
}
.theme-toggle:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-1px); }

/* ---------- 告警横幅 ---------- */
.alert-banner { max-width: 1200px; margin: 0 auto 18px; }
.alert-item {
  background: var(--red-weak); border: 1px solid var(--border); color: var(--red-text);
  padding: 11px 15px; border-radius: var(--radius-sm); font-size: 13px; margin-bottom: 10px;
  display: flex; gap: 10px; align-items: center;
}
.alert-item .badge { background: var(--red); color: #fff; font-size: 11px; padding: 2px 9px; border-radius: 20px; flex-shrink: 0; font-weight: 600; }
.alert-item.warn { background: var(--amber-weak); color: var(--amber-text); }
.alert-item.warn .badge { background: var(--amber); color: #fff; }

/* ---------- 卡片栅格 ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 18px; max-width: 1200px; margin: 0 auto; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 18px 15px; box-shadow: var(--shadow);
  transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
}
.card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); border-color: var(--border-strong); }
.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; gap: 10px; }
.node-name { font-size: 15px; font-weight: 600; }
.node-tag { font-size: 11px; padding: 3px 11px; border-radius: 20px; background: var(--green-weak); color: var(--green-text); font-weight: 600; white-space: nowrap; }
.node-tag.warn { background: var(--amber-weak); color: var(--amber-text); }
.node-tag.down { background: var(--red-weak); color: var(--red-text); }

/* ---------- 运营商行 + 进度条 ---------- */
.isp-row { display: grid; grid-template-columns: 36px 62px 1fr 58px; align-items: center; gap: 10px; margin-bottom: 13px; font-size: 12px; }
.isp-name { color: var(--text-2); font-weight: 500; }
.isp-ms, .isp-loss { text-align: right; font-weight: 600; color: var(--green); font-variant-numeric: tabular-nums; }
.isp-ms.warn, .isp-loss.warn { color: var(--amber); }
.isp-ms.bad, .isp-loss.bad { color: var(--red); }

.bar { position: relative; height: 8px; border-radius: 999px; background: var(--track); overflow: hidden; }
.bar-fill { position: absolute; left: 0; top: 0; bottom: 0; border-radius: 999px; transition: width .5s cubic-bezier(.4,0,.2,1); }
.bar-fill.on-g { background: linear-gradient(90deg, #34d399, #10b981); }
.bar-fill.on-y { background: linear-gradient(90deg, #fbbf24, #f59e0b); }
.bar-fill.on-r { background: linear-gradient(90deg, #f87171, #ef4444); }

/* ---------- 卡片页脚 ---------- */
.card-foot { display: flex; align-items: center; gap: 22px; margin-top: 16px; padding-top: 13px; border-top: 1px solid var(--border); font-size: 12px; color: var(--text-2); flex-wrap: wrap; }
.foot-item { display: flex; align-items: center; gap: 7px; }
.foot-item svg { width: 15px; height: 15px; stroke: var(--muted); flex-shrink: 0; }
.foot-item .label { color: var(--muted); }
.foot-item .val { font-weight: 700; color: var(--primary); font-variant-numeric: tabular-nums; }
.foot-item .val.green { color: var(--green); }
.foot-item .val.orange { color: var(--amber); }
.link-btn { margin-left: auto; font-size: 12px; color: var(--primary); cursor: pointer; background: none; border: none; font-weight: 600; padding: 4px 6px; border-radius: 8px; transition: .15s; }
.link-btn:hover { background: var(--primary-weak); }
.empty { text-align: center; color: var(--muted); padding: 60px 20px; }

/* ---------- 弹窗 / 历史曲线 ---------- */
.modal { position: fixed; inset: 0; background: rgba(15,23,42,.55); backdrop-filter: blur(3px); display: none; align-items: center; justify-content: center; z-index: 50; padding: 16px; }
.modal.show { display: flex; animation: fade .2s ease; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.modal-box { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; width: min(700px, 94vw); max-height: 90vh; overflow: auto; box-shadow: var(--shadow-hover); }
.modal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.modal-head h2 { font-size: 17px; }
.modal-close { cursor: pointer; border: none; background: var(--surface-2); color: var(--text-2); width: 32px; height: 32px; border-radius: 10px; font-size: 18px; transition: .15s; }
.modal-close:hover { background: var(--border); }
.legend { display: flex; gap: 18px; font-size: 12px; color: var(--text-2); margin: 4px 0 12px; flex-wrap: wrap; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 14px; height: 3px; border-radius: 2px; display: inline-block; }
canvas { width: 100%; height: 260px; display: block; }
.modal-note { font-size: 12px; color: var(--muted); margin-top: 10px; }

/* ---------- 表单 / 按钮（后台 + 安装） ---------- */
label { display: block; font-size: 13px; color: var(--text-2); margin-bottom: 6px; font-weight: 500; }
input, select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--text); font-size: 14px; outline: none; font-family: var(--font);
  transition: border-color .15s ease, box-shadow .15s ease;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-weak); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.divider { border-top: 1px solid var(--border); margin: 8px 0 16px; padding-top: 16px; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 18px; border: none; border-radius: var(--radius-sm); font-size: 14px; font-weight: 600; cursor: pointer; transition: .15s ease; font-family: var(--font); }
.btn:hover { transform: translateY(-1px); filter: brightness(1.03); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--primary); color: var(--primary-text); }
.btn-ghost { background: var(--surface-2); color: var(--text-2); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger { background: var(--red-weak); color: var(--red-text); }
.btn-danger:hover { background: var(--red); color: #fff; }
.btn-sm { padding: 6px 11px; font-size: 12px; border-radius: 8px; }

.msg { font-size: 13px; margin-top: 12px; min-height: 18px; }
.msg.ok { color: var(--green-text); }
.msg.err { color: var(--red-text); }

/* ---------- 表格 ---------- */
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 11px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .3px; }
td .hosts { color: var(--text-2); font-size: 12px; line-height: 1.6; }
.row-actions { display: flex; gap: 8px; }
.hidden { display: none !important; }
.logout { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 13px; transition: .15s; }
.logout:hover { color: var(--red); }
.link { color: var(--primary); text-decoration: none; font-size: 13px; font-weight: 500; }

/* 告警中心 pill / 行 */
.pill { padding: 2px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; background: var(--red-weak); color: var(--red-text); }
.pill.expire { background: var(--amber-weak); color: var(--amber-text); }
.alert-row.ack td { opacity: .55; }

/* ---------- 安装向导 ---------- */
.sub { color: var(--muted); font-size: 13px; margin-bottom: 22px; }
.req { list-style: none; font-size: 13px; margin: 0 0 22px; }
.req li { padding: 9px 12px; border-radius: var(--radius-sm); margin-bottom: 8px; background: var(--surface-2); display: flex; justify-content: space-between; align-items: center; border: 1px solid var(--border); }
.req .ok { color: var(--green-text); font-weight: 600; }
.req .fail { color: var(--red-text); font-weight: 600; }
.req .warn { color: var(--amber-text); font-weight: 600; }
.small { font-size: 12px; color: var(--muted); }
.sec { border-top: 1px solid var(--border); margin: 18px 0; padding-top: 18px; }

/* ---------- 后台控制台 ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.stat-card { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px 14px; transition: .18s; }
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.stat-label { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.stat-val { font-size: 22px; font-weight: 700; letter-spacing: -.4px; }
.stat-foot { font-size: 11px; color: var(--muted); margin-top: 4px; }
.stat-card.ok .stat-val { color: var(--green-text); }
.stat-card.warn .stat-val { color: var(--amber-text); }
.stat-card.danger .stat-val { color: var(--red-text); }
.stat-sub { font-size: 13px; font-weight: 600; color: var(--text-2); margin-bottom: 10px; }
/* ---------- 统一检测模块（首页） ---------- */
.detect-card { max-width: 1200px; margin: 0 auto 18px; }
.detect-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 10px; }
.detect-grid .stat-card { display: flex; flex-direction: column; }

/* 服务器状态卡 + 分段条（探针风格） */
.server-card { max-width: 1200px; margin: 0 auto 18px; }
.seg-bar { display: flex; gap: 3px; }
.seg-bar i { flex: 1; height: 9px; border-radius: 2px; background: var(--track); min-width: 2px; }
.seg-g { background: #22c55e !important; }
.seg-y { background: #f59e0b !important; }
.seg-r { background: #ef4444 !important; }
.srv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 20px; }
.srv-top { display: flex; justify-content: space-between; align-items: baseline; font-size: 13px; color: var(--text-2); gap: 8px; }
.srv-top b { font-size: 19px; color: var(--text); font-variant-numeric: tabular-nums; letter-spacing: -.4px; }
.srv-top b.warn { color: var(--amber-text); }
.srv-top b.bad  { color: var(--red-text); }
.srv-sub { font-size: 11px; color: var(--muted); margin: 3px 0 7px; }
.srv-net { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border); }
.srv-net .net-item { display: flex; align-items: baseline; gap: 7px; font-size: 13px; color: var(--text-2); }
.srv-net .net-item b { font-size: 19px; color: var(--text); font-variant-numeric: tabular-nums; }
.net-up   { color: #3b82f6; font-weight: 700; }
.net-down { color: #22c55e; font-weight: 700; }
.srv-remain { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border); }
.srv-remain .remain-top { display: flex; justify-content: space-between; font-size: 13px; color: var(--text-2); margin-bottom: 7px; }
/* 节点卡：线路名 + 延迟/丢包 + 双分段历史条 */
.isp2 { margin-bottom: 12px; }
.isp2-top { display: flex; align-items: baseline; gap: 8px; font-size: 12px; margin-bottom: 5px; }
.isp2-top .isp-name { color: var(--text-2); font-weight: 600; width: 36px; flex-shrink: 0; }
.isp2-top .isp-ms   { margin-left: auto; font-variant-numeric: tabular-nums; }
.isp2-top .isp-loss { font-variant-numeric: tabular-nums; width: 52px; text-align: right; flex-shrink: 0; }
.isp2-strips { display: flex; gap: 6px; }
.isp2-strips .seg-bar { flex: 1; }
.isp2-strips .seg-bar i { height: 8px; }
.mini-row { display: flex; align-items: center; gap: 8px; margin: 6px 0; }
.mini-label { font-size: 12px; color: var(--muted); width: 34px; flex-shrink: 0; }
.mini-val { font-size: 12px; font-weight: 700; font-variant-numeric: tabular-nums; width: 46px; text-align: right; flex-shrink: 0; }
.mini-val.warn { color: var(--amber-text); }
.mini-val.bad  { color: var(--red-text); }
/* 宝塔数据模块：以面板风格蓝色为强调色，其余沿用现有设计令牌 */
.bt-tile { border-left: 3px solid var(--bt-accent); }
.tile-list { margin-top: 8px; padding-top: 6px; border-top: 1px dashed var(--border); }
.tile-row { display: flex; align-items: center; gap: 8px; font-size: 12px; padding: 3px 0; min-width: 0; }
.tile-name { color: var(--text-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tile-row .pill { margin-left: auto; flex-shrink: 0; }
.tile-dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
.tile-dot.warn { background: var(--amber); }
.tile-dot.bad  { background: var(--red); }
.tile-more { font-size: 11px; color: var(--muted); margin-top: 4px; }

/* ---------- 后台导航栏 ---------- */
.admin-nav {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; margin-bottom: 18px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.admin-nav .nav-logo {
  width: 30px; height: 30px; flex-shrink: 0; border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff; font-size: 12px; font-weight: 700; letter-spacing: .5px;
  display: inline-flex; align-items: center; justify-content: center;
}
.admin-nav .nav-brand { font-size: 14px; font-weight: 700; letter-spacing: -.2px; white-space: nowrap; }
.admin-nav .nav-list { list-style: none; display: flex; align-items: center; gap: 4px; margin: 0; padding: 0; flex-wrap: wrap; }
.admin-nav .nav-list i { font-style: normal; font-size: 13px; line-height: 1; }
.admin-nav .nav-list .ext { font-size: 10px; opacity: .7; margin-left: 2px; }
.admin-nav .nav-list a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 12px; border-radius: 999px; font-size: 13px; font-weight: 600;
  color: var(--text-2); text-decoration: none; white-space: nowrap; transition: .15s ease;
}
.admin-nav .nav-list a:hover { background: var(--surface-2); color: var(--primary); }
.admin-nav .nav-list a.active { background: var(--primary-weak); color: var(--primary); }
.admin-nav .nav-right { margin-left: auto; }
.admin-nav .nav-right a { color: var(--muted); }
.admin-nav .nav-right a:hover { color: var(--red); background: var(--red-weak); }
.admin-nav .nav-toggle {
  display: none; margin-left: auto; width: 38px; height: 34px; cursor: pointer;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-2);
  border-radius: var(--radius-sm); font-size: 16px; line-height: 1; transition: .15s;
}
.admin-nav .nav-toggle:hover { border-color: var(--primary); color: var(--primary); }

.table-compact td, .table-compact th { padding: 8px 10px; font-size: 13px; }

/* ---------- 服务器资源监控（宝塔） ---------- */
.metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.metric-card { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 14px 16px; transition: .2s; }
.metric-card.warn { border-color: var(--amber); background: var(--amber-weak); }
.metric-card.bad  { border-color: var(--red);  background: var(--red-weak); animation: metricPulse 1.6s infinite; }
.metric-card.down { opacity: .6; }
.metric-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; gap: 8px; }
.metric-label { font-size: 13px; color: var(--text-2); font-weight: 600; }
.metric-th { font-size: 11px; color: var(--muted); white-space: nowrap; }
.metric-val { font-size: 30px; font-weight: 700; letter-spacing: -1px; line-height: 1.1; font-variant-numeric: tabular-nums; }
.metric-val.warn { color: var(--amber-text); }
.metric-val.bad  { color: var(--red-text); }
.metric-unit { font-size: 14px; font-weight: 600; margin-left: 3px; color: var(--muted); }
.metric-card .bar { margin-top: 10px; }
.metric-foot { font-size: 11px; color: var(--muted); margin-top: 7px; }
@keyframes metricPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, .28); }
  50%      { box-shadow: 0 0 0 7px rgba(239, 68, 68, 0); }
}
.pill.ok { background: var(--green-weak); color: var(--green-text); }
.pill.warn { background: var(--amber-weak); color: var(--amber-text); }
.pill.danger { background: var(--red-weak); color: var(--red-text); }

/* ---------- 响应式 ---------- */
@media (max-width: 680px) {
  body { padding: 16px; }
  .grid2, .grid3 { grid-template-columns: 1fr; }
  .isp-row { grid-template-columns: 30px 52px 1fr 50px; font-size: 11px; gap: 7px; }
  .page-title { font-size: 18px; }
  .card-foot { gap: 14px; }
  table { display: block; overflow-x: auto; white-space: nowrap; }
  .topbar { flex-direction: column; }
  .theme-toggle { align-self: flex-end; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-val { font-size: 18px; }
  .metric-grid { grid-template-columns: 1fr; }
  .metric-val { font-size: 26px; }
  .srv-grid, .srv-net { grid-template-columns: 1fr 1fr; gap: 12px; }
  /* 导航栏折叠为汉堡菜单 */
  .admin-nav { flex-wrap: wrap; gap: 10px; }
  .admin-nav .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .admin-nav .nav-list {
    display: none; width: 100%; flex-direction: column; align-items: stretch; gap: 2px;
    margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--border);
  }
  .admin-nav .nav-list.open { display: flex; }
  .admin-nav .nav-list a { padding: 10px 12px; border-radius: var(--radius-sm); }
  .admin-nav .nav-right { margin-left: 0; }
}