:root {
  --paper: #efe7d4;
  --paper-2: #e3d8bf;
  --paper-card: #fffaf0;
  --ink: #2a3554;
  --ink-2: #4d5072;
  --ink-3: #8b8aa0;
  --blue: #5a6c8d;
  --mauve: #8378a3;
  --sage: #6f8c5a;
  --butter: #c9a64a;
  --coral: #c47b5a;
  --brown: #8a6849;
  --muted: #7a7058;
  --space: #0e1724;
  --space-2: #17233a;
  --font-display: 'Yeseva One', 'ZCOOL XiaoWei', serif;
  --font-body: 'Nunito', 'Noto Sans SC', system-ui, sans-serif;
  --font-cn: 'ZCOOL XiaoWei', 'Ma Shan Zheng', serif;
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

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

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  min-height: 100dvh;
  overflow: hidden;
  display: grid;
  grid-template-rows: auto 1fr auto;
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

.site-header {
  position: relative;
  z-index: 30;
  min-height: 74px;
  padding: 14px 24px;
  display: grid;
  grid-template-columns: minmax(190px, 1fr) auto auto auto;
  align-items: center;
  gap: 18px;
  background: rgba(255, 250, 240, 0.92);
  border-bottom: 1px solid rgba(42, 53, 84, 0.14);
}

.brand {
  color: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
}

.brand-text {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1;
}

.brand-tagline {
  font-family: var(--font-cn);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mode-tabs {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 4px;
  min-width: min(100%, 420px);
  padding: 4px;
  background: var(--paper-2);
  border: 1.5px solid rgba(42, 53, 84, 0.28);
  border-radius: 8px;
}

.mode-tab {
  min-height: 36px;
  min-width: 0;
  padding: 8px 14px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ink-2);
  font-family: var(--font-cn);
  font-size: 13px;
  letter-spacing: 1px;
  white-space: nowrap;
  cursor: pointer;
}

.mode-tab:hover {
  background: rgba(255, 250, 240, 0.7);
}

.mode-tab.active {
  background: var(--ink);
  color: var(--paper-card);
  box-shadow: 0 2px 0 rgba(42, 53, 84, 0.18);
}

.panel-toggle {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 8px 16px;
  background: var(--ink);
  color: var(--paper-card);
  border: 0;
  border-radius: 999px;
  font-family: var(--font-cn);
  font-size: 13px;
  letter-spacing: 1px;
  cursor: pointer;
}

.panel-toggle:hover {
  background: var(--ink-2);
}

.panel-toggle-icon {
  width: 14px;
  height: 2px;
  display: inline-block;
  background: currentColor;
  position: relative;
}

.panel-toggle-icon::before,
.panel-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: currentColor;
}

.panel-toggle-icon::before { top: -5px; }
.panel-toggle-icon::after { top: 5px; }

.viewer {
  min-height: 0;
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, #0c1320, var(--space) 45%, #1c2131);
}

#stage {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}

#stage:active {
  cursor: grabbing;
}

.labels {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.labels[hidden] {
  display: none;
}

.label-pin {
  position: absolute;
  transform: translate(-50%, -50%);
  max-width: min(210px, 42vw);
  padding: 5px 10px 6px;
  border: 1.5px solid rgba(255, 250, 240, 0.78);
  border-radius: 999px;
  background: rgba(255, 250, 240, 0.92);
  color: var(--ink);
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.18);
  font-family: var(--font-cn);
  font-size: 12px;
  line-height: 1.15;
  letter-spacing: 1px;
  white-space: nowrap;
}

.label-pin b {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 6px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper-card);
  font-family: var(--font-body);
  font-size: 9px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 1px;
}

.label-pin.you b { background: var(--mauve); }
.label-pin.city b { background: var(--coral); }
.label-pin.province b { background: var(--butter); color: var(--ink); }
.label-pin.country b { background: var(--sage); }
.label-pin.globe b { background: var(--blue); }
.label-pin.sun b { background: #d06f3c; }
.label-pin.earth b { background: #4f8bb8; }
.label-pin.season b { background: var(--mauve); }
.label-pin.planet b { background: var(--ink-2); }

.hud {
  position: absolute;
  z-index: 4;
  top: 20px;
  left: 20px;
  width: 330px;
  max-height: calc(100% - 40px);
  overflow-y: auto;
  padding: 18px;
  background: var(--paper-card);
  color: var(--ink);
  border: 2px solid var(--ink);
  border-radius: 8px;
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.2);
  transition: transform 0.24s ease, opacity 0.2s ease;
  scrollbar-width: thin;
  scrollbar-color: rgba(42, 53, 84, 0.26) transparent;
}

.hud::-webkit-scrollbar {
  width: 6px;
}

.hud::-webkit-scrollbar-thumb {
  background: rgba(42, 53, 84, 0.24);
  border-radius: 3px;
}

.hud.collapsed {
  transform: translateX(calc(-100% - 28px));
  opacity: 0;
  pointer-events: none;
}

.hud-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 28px;
  height: 28px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  background: var(--paper-2);
  color: var(--ink);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}

.hud-close:hover {
  background: var(--ink);
  color: var(--paper-card);
}

.hud-kicker {
  margin-bottom: 6px;
  padding-right: 36px;
  color: var(--coral);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
}

.hud-title {
  padding-right: 36px;
  font-family: var(--font-cn);
  font-size: 23px;
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: 1px;
}

.hud-copy {
  margin-top: 9px;
  color: var(--ink-2);
  font-size: 13px;
  line-height: 1.55;
}

.scale-list {
  list-style: none;
  display: grid;
  gap: 8px;
  margin-top: 16px;
  padding: 0;
}

.scale-list li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 9px;
  align-items: center;
  min-height: 32px;
  font-family: var(--font-cn);
  font-size: 13px;
  letter-spacing: 0.8px;
  color: var(--ink);
  opacity: 0.55;
  transition: opacity 0.18s ease;
}

.scale-list li.active {
  opacity: 1;
}

.scale-list .no {
  width: 30px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--ink-3);
  color: var(--paper-card);
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 700;
  transition: background 0.18s ease;
}

.scale-list li.active .no {
  background: var(--coral);
}

.slider.zoom-control { display: none; }
body[data-mode="home"] .slider.zoom-control { display: grid; }
body[data-mode="home"] .check.auto-run-control,
body[data-mode="home"] .slider.speed-control { display: none; }

.control-group,
.facts {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1.5px solid rgba(42, 53, 84, 0.16);
}

.check {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-family: var(--font-cn);
  font-size: 13px;
  color: var(--ink);
  letter-spacing: 0.8px;
  cursor: pointer;
  user-select: none;
}

.check input[type="checkbox"] {
  appearance: none;
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  border: 2px solid var(--ink);
  border-radius: 5px;
  background: var(--paper-card);
  display: grid;
  place-items: center;
  cursor: pointer;
}

.check input[type="checkbox"]:checked {
  background: var(--ink);
}

.check input[type="checkbox"]:checked::after {
  content: "";
  width: 5px;
  height: 9px;
  border: solid var(--paper-card);
  border-width: 0 2.5px 2.5px 0;
  transform: rotate(45deg) translate(-1px, -1px);
}

.slider {
  display: grid;
  gap: 7px;
  margin-top: 4px;
  font-family: var(--font-cn);
  font-size: 13px;
  color: var(--ink-2);
  letter-spacing: 0.8px;
}

.slider input[type="range"] {
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 999px;
  background: rgba(42, 53, 84, 0.16);
  outline: none;
}

.slider input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--paper-card);
  cursor: grab;
}

.slider input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--paper-card);
  cursor: grab;
}

.facts h2 {
  margin-bottom: 9px;
  font-family: var(--font-cn);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
}

.facts ul {
  display: grid;
  gap: 7px;
  padding-left: 17px;
  color: var(--ink-2);
  font-size: 12.5px;
  line-height: 1.46;
}

.site-footer {
  position: relative;
  z-index: 5;
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 16px;
  background: rgba(255, 250, 240, 0.92);
  border-top: 1px solid rgba(42, 53, 84, 0.14);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.site-footer .sep {
  color: var(--coral);
}

@media (max-width: 860px) {
  body {
    overflow: hidden;
  }

  .site-header {
    min-height: 118px;
    grid-template-columns: 1fr auto auto;
    grid-template-areas:
      "brand toggle explore"
      "modes modes modes";
    padding: 12px 14px 10px;
    gap: 10px 12px;
  }

  .brand { grid-area: brand; }
  .panel-toggle { grid-area: toggle; }
  .explore { grid-area: explore; }
  .mode-tabs {
    grid-area: modes;
    width: 100%;
    min-width: 0;
  }

  .mode-tab {
    flex: 1;
    padding: 7px 6px;
    font-size: 12px;
    letter-spacing: 0.5px;
  }

  .hud {
    top: 12px;
    left: 12px;
    right: 12px;
    width: auto;
    max-height: min(410px, calc(100% - 24px));
    padding: 14px;
  }

  .hud.collapsed {
    transform: translateY(calc(-100% - 24px));
  }

  .hud-title {
    font-size: 19px;
  }

  .brand-tagline {
    font-size: 10px;
    letter-spacing: 1.3px;
  }
}

@media (max-width: 460px) {
  .site-header {
    min-height: 108px;
  }

  .brand-mark {
    width: 30px;
    height: 30px;
    flex-basis: 30px;
  }

  .brand-name {
    font-size: 17px;
  }

  .brand-tagline,
  .panel-toggle-label {
    display: none;
  }

  .panel-toggle {
    width: 38px;
    justify-content: center;
    padding: 8px;
  }

  .mode-tab {
    font-size: 11px;
  }

  .label-pin {
    max-width: 46vw;
    font-size: 11px;
    padding: 4px 8px 5px;
  }
}

/* ====== Explore menu ====== */
.explore { position: relative; flex: 0 0 auto; }
.explore-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  padding: 7px 14px;
  font-family: var(--font-cn);
  font-size: 14px;
  letter-spacing: 1px;
  cursor: pointer;
}
.explore-btn:hover { background: rgba(42,53,84,.08); }
.explore-btn[aria-expanded="true"] { background: rgba(42,53,84,.08); }
.explore-caret { font-size: 12px; line-height: 1; }
.explore-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 280px;
  background: var(--paper-card, #fffaf0);
  border: 1.5px solid var(--ink);
  border-radius: 14px;
  padding: 8px;
  box-shadow: 0 8px 24px rgba(42,53,84,.12);
  z-index: 20;
}
.explore-title {
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 6px 10px 8px;
}
.explore-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 8px 10px;
  border-radius: 10px;
  text-decoration: none;
  color: var(--ink);
}
a.explore-item:hover { background: rgba(42,53,84,.06); }
.explore-item-name { font-family: var(--font-cn); font-size: 15px; white-space: nowrap; }
.explore-item-url { font-size: 11px; color: var(--muted); letter-spacing: .5px; white-space: nowrap; }
.explore-item--current { cursor: default; opacity: .65; }
.explore-item--current .explore-item-name::after {
  content: " · 当前";
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 1px;
}

@media (max-width: 860px) {
  .explore-btn span:not(.explore-caret) { display: none; }
  .explore-btn::before { content: "···"; letter-spacing: 2px; }
  .explore-menu {
    position: fixed;
    top: 72px;
    right: 16px;
    left: 16px;
    min-width: 0;
  }
}