/* [POXIAO:connection-check] 对齐 sub2api 的青绿主色、圆角卡片与深蓝灰暗色；色值来源见 ../README.md。 */
:root {
  color-scheme: light;
  --bg: #f7f9fe; --card: #fff; --text: #111827; --muted: #6b7280;
  --border: #e5e7eb; --soft: #f8fafc; --primary: #14b8a6; --primary-end: #0d9488;
  --tint: #f0fdfa; --line: #0d9488; --warning: #b45309; --warning-bg: #fffbeb;
  --ring: rgb(17 24 39 / 5%); --shadow: 0 1px 2px rgb(0 0 0 / 5%);
  --track: #e8edf3; --info-bg: #eff6ff; --info-text: #1e3a8a; --info-ring: #dbeafe;
  --success-bg: #ecfdf5; --success-text: #064e3b; --success-ring: #a7f3d0;
  --error-bg: #fef2f2; --error-text: #7f1d1d; --error-ring: #fecaca;
  --alert-text: #78350f; --alert-ring: #fde68a;
  --healthy: #34b893; --delayed: #facc15; --failed: #f87171; --waiting: #60a5fa; --pending: #e5e7eb;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #020617; --card: #1e293b; --text: #f9fafb; --muted: #9ca3af;
  --border: #475569; --soft: #162033; --primary: #14b8a6; --primary-end: #0d9488;
  --tint: #102c30; --line: #2dd4bf; --warning: #fbbf24; --warning-bg: #352818;
  --pending: #334155;
  --ring: #334155; --track: #334155;
  --info-bg: #0c1c36; --info-text: #dbeafe; --info-ring: #1e3a5f;
  --success-bg: #062721; --success-text: #d1fae5; --success-ring: #14503c;
  --error-bg: #2b141e; --error-text: #fee2e2; --error-ring: #60212a;
  --alert-text: #fef3c7; --alert-ring: #674422;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 14px/20px Geist, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
main { max-width: 1200px; margin: auto; padding: 24px; }
h1, h2, p { margin: 0; }
h1 { font-size: 20px; line-height: 28px; font-weight: 900; }
h2 { font-size: 16px; line-height: 24px; font-weight: 700; }
p, label, button, select { overflow-wrap: anywhere; }
.muted, .hint, footer, .page-header p { color: var(--muted); }
.hint { font-size: 12px; line-height: 20px; margin-top: 4px; }
.page-header, .heading, .section-head, .result-card, .progress-label { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.page-header { margin-bottom: 24px; padding: 24px; flex-wrap: wrap; }
.heading { justify-content: flex-start; align-items: flex-start; gap: 8px; }
.page-header p { margin-top: 4px; }
.app-icon { width: 32px; height: 32px; border-radius: 12px; background: var(--info-bg); color: var(--info-text); display: grid; place-items: center; flex-shrink: 0; }
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.app-icon svg { width: 18px; height: 18px; }
.card { background: var(--card); border: 0; border-radius: 24px; box-shadow: 0 0 0 1px var(--ring), var(--shadow); }
.setup { padding: 24px; }
.section-head { margin-bottom: 8px; }
.badge { display: inline-flex; align-items: center; gap: 6px; border-radius: 999px; padding: 4px 10px; line-height: 16px; background: var(--soft); color: var(--muted); font-size: 12px; font-weight: 600; white-space: nowrap; }
.badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge.active { background: var(--success-bg); color: var(--success-text); }
.badge.warn { background: var(--warning-bg); color: var(--warning); }
.badge.error { background: var(--error-bg); color: var(--error-text); }
.route { display: flex; align-items: center; gap: 14px; max-width: 650px; margin: 24px 0; color: var(--muted); }
.route span:not(.route-line) { background: var(--soft); padding: 8px 16px; border-radius: 999px; white-space: nowrap; }
.route-line { height: 1px; flex: 1; min-width: 12px; background: var(--border); }
form { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
label { display: flex; flex-direction: column; gap: 6px; font-weight: 500; }
form label { flex: 1; min-width: 170px; }
select, .btn { border: 1px solid var(--border); border-radius: 8px; color: var(--text); background: var(--card); font: inherit; min-height: 42px; }
select { padding: 10px 36px 10px 16px; cursor: pointer; width: 100%; }
.theme-control { flex-direction: row; align-items: center; color: var(--muted); font-size: 12px; }
.theme-control select { width: auto; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 16px; font-weight: 500; cursor: pointer; box-shadow: var(--shadow); transition: background .2s, border-color .2s, box-shadow .2s, transform .2s; white-space: nowrap; }
.btn svg { width: 18px; height: 18px; }
.btn:hover:not(:disabled) { background: #f9fafb; border-color: #d1d5db; }
:root[data-theme="dark"] .btn:hover:not(:disabled) { background: #334155; border-color: #64748b; }
.btn:active:not(:disabled) { transform: scale(.98); }
.btn.primary { background: linear-gradient(to right, var(--primary), var(--primary-end)); color: #fff; border-color: var(--primary); box-shadow: 0 4px 6px -1px rgb(20 184 166 / 25%), 0 2px 4px -2px rgb(20 184 166 / 25%); }
.btn.primary:hover:not(:disabled) { background: linear-gradient(to right, #0d9488, #0f766e); border-color: #0d9488; }
.btn:disabled, select:disabled { opacity: .5; cursor: not-allowed; }
:focus-visible { outline: 2px solid var(--line); outline-offset: 3px; }
.progress-panel { padding: 16px; margin-top: 24px; border-radius: 16px; background: var(--soft); }
progress { appearance: none; display: block; width: 100%; height: 12px; margin: 12px 0 0; border: 0; border-radius: 999px; overflow: hidden; background: var(--track); }
progress::-webkit-progress-bar { background: var(--track); border-radius: 999px; }
progress::-webkit-progress-value { background: var(--healthy); border-radius: 999px; transition: width .2s linear; }
progress::-moz-progress-bar { background: var(--healthy); border-radius: 999px; }
.progress-label { font-size: 12px; color: var(--muted); flex-wrap: wrap; gap: 4px; }
.metrics { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin: 24px 0; }
.metric { padding: 20px; min-height: 138px; }
.metric p { color: var(--muted); }
.metric strong { display: block; font-size: 30px; font-weight: 900; margin: 20px 0 4px; line-height: 36px; font-variant-numeric: tabular-nums; }
.metric small { font-size: 12px; font-weight: 400; color: var(--muted); }
.metric > span { color: var(--muted); font-size: 12px; }
#failures { display: flex; flex-wrap: wrap; gap: 0 8px; }
#failures span { white-space: nowrap; }
.history-card { padding: 24px; border-radius: 24px; }
.history-card .section-head { align-items: flex-start; flex-wrap: wrap; }
.history-heading { display: flex; justify-content: space-between; gap: 8px; margin-top: 20px; margin-bottom: 12px; }
.history-heading span { color: var(--muted); font-size: 14px; }
.history-heading b { color: var(--text); font-weight: 600; }
.history-scroll { overflow-x: auto; padding: 6px 3px; }
#history { display: flex; gap: 3px; min-width: 450px; }
.history-bar { flex: 1; min-width: 0; height: 36px; border: 0; border-radius: 999px; padding: 0; cursor: pointer; transition: opacity .18s; }
.history-bar:hover { opacity: .7; }
.history-bar[aria-pressed="true"] { outline: 2px solid var(--text); outline-offset: 2px; }
.history-ok { background-color: var(--healthy); }
.history-slow { background-color: var(--delayed); }
.history-error { background-color: var(--failed); }
.history-waiting { background-color: var(--waiting); }
.history-pending { background-color: var(--pending); }
.history-axis { display: flex; justify-content: space-between; margin-top: 6px; font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.segment-detail { border-radius: 16px; padding: 12px 16px; margin-top: 14px; background: var(--soft); color: var(--muted); font-size: 12px; line-height: 24px; }
.event-details { margin-top: 14px; border: 1px solid var(--border); border-radius: 16px; overflow: hidden; }
.event-details summary { color: var(--line); font-size: 12px; font-weight: 500; padding: 12px 16px; cursor: pointer; min-height: 44px; }
.event-details[open] summary { border-bottom: 1px solid var(--border); }
.legend { display: flex; gap: 8px 16px; flex-wrap: wrap; color: var(--muted); font-size: 12px; margin-top: 24px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 50%; }
.history-note { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); color: var(--muted); font-size: 12px; }
#events { list-style: none; padding: 0 14px; margin: 0; max-height: 220px; overflow-y: auto; }
#events li { display: flex; gap: 12px; border-bottom: 1px solid var(--border); padding: 11px 0; font-size: 13px; }
#events time { color: var(--muted); font-variant-numeric: tabular-nums; flex-shrink: 0; }
#events .empty-event { border: 0; color: var(--muted); }
.result-card { --panel-bg: var(--info-bg); --panel-text: var(--info-text); --panel-ring: var(--info-ring); margin-top: 24px; padding: 24px; align-items: center; background: var(--panel-bg); color: var(--panel-text); box-shadow: inset 0 0 0 1px var(--panel-ring), var(--shadow); }
.result-card[data-tone="success"] { --panel-bg: var(--success-bg); --panel-text: var(--success-text); --panel-ring: var(--success-ring); }
.result-card[data-tone="warning"] { --panel-bg: var(--warning-bg); --panel-text: var(--alert-text); --panel-ring: var(--alert-ring); }
.result-card[data-tone="error"] { --panel-bg: var(--error-bg); --panel-text: var(--error-text); --panel-ring: var(--error-ring); }
.result-info { display: flex; align-items: flex-start; gap: 16px; }
.result-icon { display: grid; place-items: center; flex-shrink: 0; width: 48px; height: 48px; border-radius: 16px; background: rgb(255 255 255 / 65%); }
:root[data-theme="dark"] .result-icon { background: rgb(15 23 42 / 40%); }
.result-icon svg { width: 26px; height: 26px; }
.result-card .result-label { font-size: 12px; font-weight: 600; opacity: .8; margin: 0 0 4px; }
.result-card h2 { font-size: 24px; line-height: 32px; font-weight: 900; letter-spacing: -.3px; }
#result-desc { margin-top: 8px; line-height: 24px; opacity: .8; }
footer { text-align: center; font-size: 12px; padding-top: 24px; }
[hidden] { display: none !important; }
@media (max-width: 800px) { main { padding: 20px; } .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 480px) { main { padding: 16px; }  .page-header, .setup, .history-card, .result-card { padding: 20px; } .route { gap: 6px; } .route span:not(.route-line) { padding: 8px; font-size: 12px; } form label { flex-basis: 100%; } form .btn { flex: 1; } .metrics { gap: 16px; } .result-card { align-items: stretch; flex-direction: column; }  .progress-label { flex-direction: column; align-items: flex-start; } }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* 与主站相同的细滚动条，时间轴保持内部滚动。 */
html { scrollbar-width: thin; scrollbar-color: rgb(100 116 139 / 40%) transparent; }
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgb(100 116 139 / 40%); border-radius: 999px; }