/* ============================================================
   IP 检测 —— 极简浅色
   ============================================================ */

:root {
  --bg: #faf9f7;
  --text: #1a1a1a;
  --muted: #6f6f6f;
  --faint: #a8a8a8;
  --line: #e6e3dd;
  --line-strong: #cfcbc2;

  --danger: #b42318;
  --ok: #1a7f4b;
  --warn: #b54708;

  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: 100%; max-width: 660px; margin: 0 auto; padding: 0 24px; }

/* ---------------- 顶栏 ---------------- */

.topbar {
  position: sticky; top: 0; z-index: 10;
  background: rgba(250, 249, 247, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; height: 54px; }
.brand { font-size: 14px; font-weight: 600; }

.btn-quiet {
  font: inherit; font-size: 13px; color: var(--muted);
  background: none; border: none; padding: 4px 0; cursor: pointer;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.btn-quiet:hover:not(:disabled) { color: var(--text); border-bottom-color: var(--line-strong); }
.btn-quiet:disabled { opacity: 0.4; cursor: default; }

/* ---------------- 结论 ---------------- */

main { padding-bottom: 32px; }

.verdict { padding: 36px 0 28px; border-bottom: 1px solid var(--line); }
/* 直连时不下结论，整块隐藏（含 padding 和分隔线） */
.verdict[hidden] { display: none; }
.verdict h1 {
  margin: 0; font-size: 21px; font-weight: 600;
  line-height: 1.4; letter-spacing: -0.01em;
}
.verdict p { margin: 8px 0 0; font-size: 14px; color: var(--muted); max-width: 52ch; }
.verdict p:empty { display: none; }
.verdict.is-danger h1 { color: var(--danger); }
.verdict.is-ok h1 { color: var(--ok); }
.verdict.is-warn h1 { color: var(--warn); }
.verdict.is-loading h1 { color: var(--faint); font-weight: 400; }

/* ---------------- IP ---------------- */

.ips { border-bottom: 1px solid var(--line); }

.ip-block { padding: 26px 0; }
.ip-block + .ip-block { border-top: 1px solid var(--line); }
.ip-block[hidden] { display: none; }

.label {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--faint);
}

.value-row { display: flex; align-items: baseline; gap: 12px; margin-top: 6px; }

.ip {
  font-family: var(--mono);
  font-size: clamp(24px, 6.5vw, 34px);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.15;
  word-break: break-all;
}

.copy {
  flex: none; font: inherit; font-size: 12px; color: var(--faint);
  background: none; border: none; padding: 0; cursor: pointer;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.copy:hover { color: var(--text); border-bottom-color: var(--line-strong); }

.meta { margin-top: 8px; font-size: 13.5px; color: var(--muted); }
.meta .sep { color: var(--line-strong); margin: 0 7px; }

/* ---------------- 折叠区 ---------------- */

.fold { border-bottom: 1px solid var(--line); }

.fold > summary {
  padding: 15px 0; font-size: 13.5px; color: var(--muted);
  cursor: pointer; list-style: none;
  display: flex; align-items: center; justify-content: space-between;
  transition: color 0.15s;
}
.fold > summary::-webkit-details-marker { display: none; }
.fold > summary::after { content: "+"; font-family: var(--mono); font-size: 15px; color: var(--faint); }
.fold[open] > summary { color: var(--text); }
.fold[open] > summary::after { content: "−"; }
.fold > summary:hover { color: var(--text); }

.fold-body { padding: 0 0 28px; }

.fold-body h3 {
  margin: 22px 0 6px;
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--faint);
  display: flex; align-items: baseline; justify-content: space-between;
}
.fold-body h3:first-child { margin-top: 0; }

.hint-inline { font-size: 11px; letter-spacing: 0; text-transform: none; font-weight: 400; }

/* ---------------- 键值表 ---------------- */

.kv { margin: 0; }
.kv > div {
  display: flex; gap: 16px; padding: 7px 0;
  border-bottom: 1px solid var(--line);
}
.kv > div:last-child { border-bottom: none; }
.kv dt { flex: none; width: 140px; color: var(--faint); margin: 0; font-size: 13px; }
.kv dd {
  margin: 0; flex: 1; min-width: 0; word-break: break-word;
  font-family: var(--mono); font-size: 12.5px;
}

/* ---------------- 表格 ---------------- */

.table-wrap { overflow-x: auto; }
table.plain { width: 100%; border-collapse: collapse; font-size: 13px; }
table.plain th {
  text-align: left; padding: 6px 12px 6px 0;
  font-size: 11px; font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--faint);
  border-bottom: 1px solid var(--line-strong); white-space: nowrap;
}
table.plain td { padding: 7px 12px 7px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
table.plain tr:last-child td { border-bottom: none; }
table.plain .mono { font-family: var(--mono); font-size: 12.5px; word-break: break-all; }

.cc {
  display: inline-block; min-width: 2.1em; margin-right: 6px;
  padding: 1px 4px; font-family: var(--mono);
  font-size: 10.5px; font-weight: 600; letter-spacing: 0.04em;
  text-align: center; color: var(--muted);
  border: 1px solid var(--line-strong); border-radius: 2px;
}

.tag { font-size: 12.5px; }
.tag.is-bad { color: var(--danger); }
.tag.is-good { color: var(--ok); }
.tag.is-warn { color: var(--warn); }
.tag.is-idle { color: var(--faint); }

.link {
  font: inherit; font-size: 12px; color: var(--muted);
  background: none; border: none; padding: 0; cursor: pointer;
  border-bottom: 1px solid var(--line-strong);
}
.link:hover { color: var(--text); }

.empty { padding: 12px 0; color: var(--faint); font-size: 13px; }

/* ---------------- 页脚 ---------------- */

footer {
  padding: 24px 24px 44px;
  font-size: 12px; color: var(--faint); line-height: 1.7;
}
footer p { margin: 0; }

/* ---------------- 提示 ---------------- */

.toast {
  position: fixed; left: 50%; bottom: 28px;
  transform: translate(-50%, 8px);
  padding: 8px 16px; font-size: 13px;
  color: var(--bg); background: var(--text); border-radius: 2px;
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s, transform 0.2s; z-index: 50;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------------- 响应式 ---------------- */

@media (max-width: 520px) {
  .wrap { padding: 0 18px; }
  footer { padding-left: 18px; padding-right: 18px; }
  .verdict { padding: 28px 0 22px; }
  .ip-block { padding: 20px 0; }
  .kv dt { width: 104px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}