:root {
  color-scheme: dark;
  --bg: #0b1020;
  --bg-elevated: rgba(18, 24, 42, 0.88);
  --border: rgba(148, 163, 184, 0.16);
  --text: #e8eefc;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --success: #34d399;
  --danger: #f87171;
  --warning: #fbbf24;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius: 18px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(56, 189, 248, 0.18), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(129, 140, 248, 0.16), transparent 50%),
    radial-gradient(700px 400px at 50% 100%, rgba(52, 211, 153, 0.08), transparent 45%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at center, black 30%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}

.shell {
  position: relative;
  z-index: 1;
  width: min(720px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 3.5rem 0 4rem;
}

.hero {
  margin-bottom: 1.5rem;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 0.75rem;
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(15, 23, 42, 0.55);
}

.hero h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  max-width: 38rem;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.35rem;
  margin-bottom: 1rem;
  backdrop-filter: blur(12px);
}

.card.muted {
  box-shadow: none;
  background: rgba(15, 23, 42, 0.55);
}

.card h2 {
  margin: 0 0 0.9rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.status-row {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 500;
}

.dot {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--warning);
  box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.15);
}

.dot[data-state="loading"] {
  background: var(--warning);
  animation: pulse 1.2s ease-in-out infinite;
}

.dot[data-state="ok"] {
  background: var(--success);
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.15);
  animation: none;
}

.dot[data-state="error"] {
  background: var(--danger);
  box-shadow: 0 0 0 4px rgba(248, 113, 113, 0.15);
  animation: none;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.55;
    transform: scale(0.85);
  }
}

.meta {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.primary-btn {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 1.15rem;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.95), rgba(129, 140, 248, 0.95));
  color: #0b1020;
  text-decoration: none !important;
  transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
  box-shadow: 0 12px 30px rgba(56, 189, 248, 0.22);
}

.primary-btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.primary-btn:active {
  transform: translateY(0);
}

.btn-label {
  font-weight: 700;
  font-size: 1.05rem;
}

.btn-url {
  font-family: var(--mono);
  font-size: 0.82rem;
  word-break: break-all;
  opacity: 0.85;
}

.ghost-btn {
  margin-top: 0.85rem;
  appearance: none;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 999px;
  padding: 0.45rem 0.95rem;
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.ghost-btn:hover {
  background: rgba(148, 163, 184, 0.08);
  border-color: rgba(148, 163, 184, 0.35);
}

.ghost-btn.compact {
  margin-top: 0;
  padding: 0.3rem 0.75rem;
  font-size: 0.8rem;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.9rem;
}

.section-head h2 {
  margin: 0;
}

.link-list,
.source-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.link-item {
  display: grid;
  gap: 0.35rem;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.45);
}

.link-item a {
  font-family: var(--mono);
  font-size: 0.88rem;
  word-break: break-all;
  color: var(--text);
}

.link-item a:hover {
  color: var(--accent);
}

.link-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.75rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.12rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(148, 163, 184, 0.08);
}

.source-item {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.source-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.source-item:first-child {
  padding-top: 0;
}

.ok-text {
  color: var(--success);
}

.err-text {
  color: var(--danger);
}

.footer {
  margin-top: 1.75rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.footer p {
  margin: 0 0 0.4rem;
}

.api-hint code {
  font-family: var(--mono);
  font-size: 0.82rem;
  padding: 0.1rem 0.4rem;
  border-radius: 6px;
  background: rgba(148, 163, 184, 0.1);
  border: 1px solid var(--border);
}

@media (max-width: 520px) {
  .shell {
    padding-top: 2.25rem;
  }

  .card {
    padding: 1.05rem 1.05rem;
  }
}