:root {
  --bg: #0b1020;
  --bg-panel: #141b31;
  --bg-card: #1a2340;
  --fg: #e8ecf5;
  --fg-dim: #93a0bd;
  --accent: #4f8cff;
  --accent-hover: #3b78f0;
  --green: #2ecc8f;
  --amber: #f2b134;
  --red: #ff6b6b;
  --border: #263256;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1b2647 0%, var(--bg) 60%);
  color: var(--fg);
  line-height: 1.6;
  min-height: 100vh;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

.hero { text-align: center; margin-bottom: 32px; }
.hero h1 { font-size: 2.2rem; margin: 0 0 8px; letter-spacing: 1px; }
.subtitle { color: var(--fg-dim); margin: 0; font-size: 1.05rem; }

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  margin-bottom: 24px;
}

.btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 14px 36px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s;
}
.btn:hover:not(:disabled) { background: var(--accent-hover); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.6; cursor: default; }

.status { margin-top: 16px; color: var(--fg-dim); font-size: 0.92rem; }

.progress {
  margin-top: 14px;
  height: 6px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 99px;
  transition: width 0.3s ease;
}

[hidden] { display: none !important; }
.results { display: flex; flex-direction: column; gap: 18px; }

.conclusion {
  border-radius: var(--radius);
  padding: 18px 22px;
  font-size: 1.05rem;
  font-weight: 500;
  border: 1px solid var(--border);
}
.conclusion-public { background: rgba(46, 204, 143, 0.12); border-color: var(--green); }
.conclusion-isp { background: rgba(242, 177, 52, 0.12); border-color: var(--amber); }
.conclusion-error { background: rgba(255, 107, 107, 0.12); border-color: var(--red); }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.card h2 { margin: 0 0 14px; font-size: 1.1rem; }

.resolver-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.resolver-item {
  padding: 12px 14px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.resolver-ip { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 1.05rem; }
.resolver-meta { color: var(--fg-dim); font-size: 0.9rem; margin-top: 4px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.badge { font-size: 0.78rem; padding: 2px 10px; border-radius: 99px; font-weight: 600; }
.badge-public { background: rgba(79, 140, 255, 0.2); color: #9cbcff; }
.badge-unknown { background: rgba(147, 160, 189, 0.15); color: var(--fg-dim); }

.kv { display: grid; grid-template-columns: auto 1fr; gap: 8px 18px; margin: 0; }
.kv dt { color: var(--fg-dim); font-size: 0.9rem; }
.kv dd { margin: 0; font-family: ui-monospace, Menlo, Consolas, monospace; word-break: break-all; }

.empty { color: var(--fg-dim); font-style: italic; }

.foot { margin-top: 36px; color: var(--fg-dim); font-size: 0.88rem; }
.foot summary { cursor: pointer; font-weight: 600; color: var(--fg); }
.foot code { background: var(--bg-card); padding: 1px 6px; border-radius: 5px; }
.disclaimer { margin-top: 14px; font-size: 0.8rem; opacity: 0.7; }

@media (max-width: 480px) {
  .hero h1 { font-size: 1.7rem; }
  .wrap { padding: 32px 16px 48px; }
}