:root {
  --bg: #0f1720;
  --bg-card: #17212b;
  --bg-card-2: #1d2937;
  --border: #2a3746;
  --fg: #e6edf3;
  --fg-dim: #94a3b8;
  --accent: #38bdf8;
  --ok: #34d399;
  --err: #f87171;
  --warn: #fbbf24;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre, .mono { font-family: var(--mono); font-size: 13px; }

.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px 20px; background: #121b24; border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10; flex-wrap: wrap;
}
.brand { font-weight: 600; font-size: 17px; display: flex; align-items: center; gap: 8px; }
.brand small { color: var(--fg-dim); font-weight: 400; font-size: 12px; margin-left: 6px; }
.brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.topbar nav { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.topbar nav a { color: var(--fg-dim); font-size: 14px; }
.topbar nav a:hover { color: var(--fg); }

main { padding: 20px; max-width: 1280px; margin: 0 auto; }
footer { padding: 16px 20px 32px; color: #64748b; font-size: 12px; text-align: center; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin-bottom: 16px; }
.card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px; margin-bottom: 16px;
}
.card.narrow { max-width: 680px; }
.card.stat { display: flex; flex-direction: column; gap: 6px; margin: 0; }
.card.stat .k { color: var(--fg-dim); font-size: 12px; }
.card.stat .v { font-size: 20px; font-weight: 600; }
.card.stat .v.small { font-size: 13px; font-weight: 500; word-break: break-all; }
.card h2 { margin: 0 0 12px; font-size: 16px; }
.card h3 { margin: 18px 0 8px; font-size: 14px; color: var(--fg-dim); }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.card-head h2 { margin: 0; }

label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--fg-dim); }
input[type=text], input[type=password], input[type=search], select {
  background: #0d151d; border: 1px solid var(--border); color: var(--fg);
  padding: 8px 10px; border-radius: 7px; font-size: 14px; font-family: var(--mono); min-width: 120px;
}
select { font-family: inherit; cursor: pointer; }
input:focus { outline: 2px solid rgba(56,189,248,.35); border-color: var(--accent); }
input[readonly] { color: var(--fg-dim); }

button, .mini {
  background: var(--bg-card-2); color: var(--fg); border: 1px solid var(--border);
  padding: 7px 12px; border-radius: 7px; cursor: pointer; font-size: 13px; text-decoration: none;
  display: inline-block; line-height: 1.3;
}
button:hover, .mini:hover { border-color: var(--accent); color: #fff; text-decoration: none; }
button.primary { background: #0ea5e9; border-color: #0ea5e9; color: #04141f; font-weight: 600; }
button.primary:hover { background: #38bdf8; border-color: #38bdf8; }
button.danger { color: var(--err); border-color: #4a2b30; }
button.danger:hover { background: #3a1d22; border-color: var(--err); color: #fff; }
button.link { background: none; border: none; color: var(--fg-dim); padding: 0; font-size: 14px; }
button.link:hover { color: var(--fg); }
form.inline { display: inline; }

.row-form { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.row-form .grow { flex: 1 1 240px; }
.row-form label { flex: 0 0 auto; }
.row-form label input { width: 100%; }
.row-form .host-field { flex: 0 0 220px; }
.row-form .port-field { flex: 0 0 110px; }
.row-form .port-field input { text-align: center; }
.row-form .note-field { flex: 0 1 180px; }
.col-form { display: flex; flex-direction: column; gap: 14px; }
.buttons { display: flex; gap: 10px; align-items: center; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--fg-dim); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
tbody tr:hover { background: #1b2531; }
td.ip code { color: #a5f3fc; word-break: break-all; }
td.go { font-size: 13px; }
td.go code { color: #a5f3fc; font-size: 12px; word-break: break-all; }
td.num { text-align: center; color: var(--fg-dim); }
td.client, td.time { color: var(--fg-dim); font-size: 13px; }
.sub { color: #64748b; font-size: 12px; margin-top: 2px; }
.empty { text-align: center; color: var(--fg-dim); padding: 24px; }
.actions { white-space: nowrap; }
.actions form { display: inline-block; margin-left: 6px; }

.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; border: 1px solid; font-size: 14px; }
.flash.ok { background: rgba(52,211,153,.1); border-color: rgba(52,211,153,.4); color: #a7f3d0; }
.flash.err { background: rgba(248,113,113,.1); border-color: rgba(248,113,113,.4); color: #fecaca; }
.flash.info { background: rgba(56,189,248,.1); border-color: rgba(56,189,248,.4); color: #bae6fd; }

.hint { color: var(--fg-dim); font-size: 12.5px; margin: 8px 0; }
.snippet { background: #0d151d; border: 1px solid var(--border); border-radius: 8px; padding: 12px; overflow-x: auto; }
.copy-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.copy-row code { background: #0d151d; border: 1px solid var(--border); border-radius: 6px; padding: 8px 10px; word-break: break-all; }

.login-wrap { display: flex; justify-content: center; padding-top: 8vh; }
.card.login { width: 100%; max-width: 380px; display: flex; flex-direction: column; gap: 14px; }
.card.login h1 { margin: 0 0 4px; font-size: 20px; }

@media (max-width: 640px) {
  .row-form { flex-direction: column; align-items: stretch; }
  main { padding: 12px; }
}