:root {
  --bg: #0f1419;
  --panel: #1a212a;
  --panel-2: #232c38;
  --text: #e6eaf0;
  --text-dim: #9aa3b0;
  --accent: #4ea3e0;
  --accent-2: #2e86ab;
  --border: #2a3442;
  --danger: #d04949;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Microsoft YaHei", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 10px 18px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-cn { font-size: 15px; font-weight: 600; }
.brand-en { font-size: 11px; color: var(--text-dim); margin-top: 2px; }

.controls { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }

.ctrl { display: flex; flex-direction: column; gap: 4px; }
.ctrl > span { font-size: 11px; color: var(--text-dim); }
.ctrl > select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 8px;
  font-size: 13px;
  min-width: 140px;
}

.lang-toggle {
  align-self: flex-end;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 12px;
  height: 30px;
}
.lang-toggle:hover { border-color: var(--accent); }

.tabs {
  display: flex;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 0 12px;
}
.tab {
  background: transparent;
  border: 0;
  color: var(--text-dim);
  padding: 10px 16px;
  cursor: pointer;
  font-size: 13px;
  border-bottom: 2px solid transparent;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

main { flex: 1; overflow: auto; padding: 14px 18px; }

.tab-panel { display: none; }
.tab-panel.active { display: flex; flex-direction: column; gap: 12px; height: 100%; }

.time-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
}
.time-strip input[type=range] { flex: 1; accent-color: var(--accent); }
.icon-btn {
  background: var(--accent-2);
  border: 0;
  color: white;
  width: 30px; height: 30px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 14px;
}
.icon-btn:hover { background: var(--accent); }
.jday-label {
  min-width: 180px;
  font-variant-numeric: tabular-nums;
  color: var(--text-dim);
  text-align: right;
}

.plot {
  flex: 1;
  min-height: 420px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.hint, .placeholder {
  color: var(--text-dim);
  font-size: 12px;
  margin: 4px 0;
}
.placeholder { padding: 24px; text-align: center; }

.ts-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 0;
}
.pin-count { color: var(--text-dim); font-size: 12px; }
.text-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 4px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 12px;
}
.text-btn:hover { color: var(--text); border-color: var(--accent); }

.pin-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.pin-list li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 4px 10px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.pin-list li .swatch {
  width: 10px; height: 10px; border-radius: 50%;
}
.pin-list li button {
  background: transparent; border: 0; color: var(--text-dim);
  cursor: pointer;
}

.footer {
  padding: 8px 18px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-dim);
}
.footer a { color: var(--accent); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

@media (max-width: 800px) {
  .topbar { flex-direction: column; align-items: stretch; }
  .controls { gap: 8px; }
  .jday-label { min-width: 0; }
}