:root {
  --bg: #070c1b;
  --bg-2: #0b1228;
  --card: #101a36;
  --card-border: #1c2a52;
  --text: #e6edff;
  --text-dim: #7d8db8;
  --blue: #3b82f6;
  --blue-bright: #60a5fa;
  --orange: #f97316;
  --cyan: #38bdf8;
  --green: #34d399;
  --radius: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  height: 100%;
  background: radial-gradient(1200px 800px at 20% -10%, #0e1a3d 0%, var(--bg) 55%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
}

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-bottom: 1px solid var(--card-border);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(7, 12, 27, 0.7);
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  font-size: 20px;
  background: linear-gradient(135deg, var(--blue), #1d4ed8);
  border-radius: 10px;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.35);
}
.brand h1 { font-size: 17px; letter-spacing: 0.5px; }
.brand span { font-size: 12px; color: var(--text-dim); }

.controls { display: flex; align-items: center; gap: 12px; }
select {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  outline: none;
}
.range-switch { display: flex; background: var(--card); border: 1px solid var(--card-border); border-radius: 8px; overflow: hidden; }
.range-switch button {
  background: transparent; border: none; color: var(--text-dim);
  padding: 8px 14px; font-size: 13px; cursor: pointer;
}
.range-switch button.active { background: var(--blue); color: #fff; }
.api-btn {
  background: var(--card); color: var(--text-dim);
  border: 1px solid var(--card-border); border-radius: 8px;
  padding: 8px 12px; cursor: pointer; font-size: 13px;
}
.api-btn:hover { color: var(--text); }

/* ---------- API 弹窗 ---------- */
.api-modal {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(0,0,0,0.6);
  display: grid; place-items: center;
}
.api-modal[hidden] { display: none; }
.api-modal-card {
  width: 480px; max-width: 92vw;
  background: var(--bg-2); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 22px;
}
.api-modal-card h3 { margin-bottom: 8px; }
.api-modal-card p { color: var(--text-dim); font-size: 13px; line-height: 1.6; margin-bottom: 14px; }
.api-modal-card code { color: var(--cyan); }
.api-modal-card input {
  width: 100%; padding: 10px 12px; font-size: 13px;
  background: var(--card); color: var(--text);
  border: 1px solid var(--card-border); border-radius: 8px; outline: none;
}
.api-modal-actions { display: flex; gap: 10px; margin-top: 14px; }
.api-modal-actions button {
  flex: 1; padding: 10px; border-radius: 8px; border: none; cursor: pointer; font-size: 13px;
}
.api-modal-actions .primary { background: var(--blue); color: #fff; }
.api-modal-actions button:not(.primary) { background: var(--card); color: var(--text-dim); border: 1px solid var(--card-border); }
.hint { margin-top: 10px; font-size: 12px; color: var(--green); }

/* ---------- 布局 ---------- */
.layout { padding: 20px 24px; max-width: 1560px; margin: 0 auto; }

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
}

/* 指标卡 */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 14px;
}
.metric-card { padding: 18px; }
.metric-card.wide { grid-column: span 2; }
.metric-label { color: var(--text-dim); font-size: 13px; margin-bottom: 10px; display: flex; align-items: center; gap: 6px; }
.metric-label .dim { font-size: 11px; opacity: 0.7; }
.metric-value { font-size: 32px; font-weight: 700; letter-spacing: 0.5px; font-variant-numeric: tabular-nums; }
.metric-change { font-size: 12px; margin-top: 6px; color: var(--text-dim); }
.metric-change.up { color: var(--green); }
.metric-change.down { color: #f87171; }
.metric-change .dim { color: var(--text-dim); }

/* 地球 + 排行 */
.main-grid {
  display: grid;
  grid-template-columns: minmax(420px, 1.35fr) 1fr;
  gap: 14px;
}
.globe-card { position: relative; min-height: 480px; overflow: hidden; }
.globe-wrap { position: absolute; inset: 0; cursor: grab; }
.globe-wrap:active { cursor: grabbing; }
.legend {
  position: absolute; left: 16px; bottom: 14px;
  display: flex; gap: 16px; font-size: 12px; color: var(--text-dim);
  background: rgba(7,12,27,0.6); padding: 8px 12px; border-radius: 8px;
  backdrop-filter: blur(4px);
}
.legend .dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; margin-right: 5px; }
.dot-colo { background: var(--orange); box-shadow: 0 0 6px var(--orange); }
.dot-visitor { background: var(--cyan); box-shadow: 0 0 6px var(--cyan); }

.rank-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-content: start;
}
.rank-card { padding: 14px 16px; min-height: 180px; }
.rank-card h3 { font-size: 13px; color: var(--text-dim); font-weight: 600; margin-bottom: 10px; }
.rank-card ol { list-style: none; }
.rank-card li {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 0; font-size: 13px;
  border-bottom: 1px solid rgba(28,42,82,0.4);
}
.rank-card li:last-child { border-bottom: none; }
.rank-card .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rank-card .count { color: var(--text-dim); font-variant-numeric: tabular-nums; }
.rank-card .bar {
  height: 4px; border-radius: 2px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
}

.footer {
  text-align: center; padding: 18px; font-size: 12px; color: var(--text-dim);
}

/* 响应式 */
@media (max-width: 1000px) {
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .main-grid { grid-template-columns: 1fr; }
  .globe-card { min-height: 380px; }
}

@media (max-width: 560px) {
  .metrics { grid-template-columns: 1fr; }
  .metric-card.wide { grid-column: span 1; }
  .rank-grid { grid-template-columns: 1fr; }
}