:root {
  --ink: #1a1410;
  --ink-2: #2a2118;
  --paper: #f4e9d4;
  --paper-dim: #e8d9b8;
  --vermilion: #c23a2b;
  --vermilion-dim: rgba(194, 58, 43, 0.28);
  --gold: #c9a227;
  --gold-dim: rgba(201, 162, 39, 0.35);
  --teal: #2f6f5e;
  --teal-2: #3d8a74;
  --muted: #8a7a62;
  --line: rgba(201, 162, 39, 0.28);
  --ok: #3d8a5a;
  --warn: #c47a1a;
  --danger: #c23a2b;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(1200px 600px at 12% -10%, rgba(201, 162, 39, 0.08), transparent 50%),
    radial-gradient(900px 500px at 100% 100%, rgba(47, 111, 94, 0.12), transparent 45%),
    var(--ink);
  color: var(--paper);
}

#app {
  max-width: 1360px;
  margin: 0 auto;
  padding: 20px 18px 36px;
}

.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.brand h1 {
  margin: 0;
  font-family: "Songti SC", "STSong", "Noto Serif SC", serif;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.brand p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.site-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.nav-link {
  appearance: none;
  text-decoration: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--paper-dim);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
}

.nav-link:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.nav-link.is-active {
  background: rgba(201, 162, 39, 0.16);
  border-color: var(--gold);
  color: var(--gold);
}

.layout {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.layout-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: start;
}

.panel {
  background: linear-gradient(180deg, rgba(42, 33, 24, 0.92), rgba(26, 20, 16, 0.96));
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
}

aside .panel + .panel,
.mt-12 {
  margin-top: 12px;
}

.panel h2,
.section-title {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.choice-grid,
.map-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.choice-btn,
.map-btn {
  appearance: none;
  border: 1px solid rgba(201, 162, 39, 0.22);
  background: rgba(244, 233, 212, 0.04);
  color: var(--paper);
  border-radius: 8px;
  padding: 8px 4px;
  cursor: pointer;
  font-size: 13px;
  line-height: 1.2;
}

.choice-btn:hover,
.map-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.choice-btn.active,
.map-btn.active {
  background: rgba(201, 162, 39, 0.16);
  border-color: var(--gold);
  color: var(--gold);
  box-shadow: inset 0 0 0 1px rgba(201, 162, 39, 0.2);
}

.choice-btn small,
.map-btn small {
  display: block;
  margin-top: 3px;
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0;
}

.coord-row,
.fields-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 4px;
}

label.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: var(--muted);
}

label.field input,
label.field select {
  width: 100%;
  padding: 9px 10px;
  border-radius: 8px;
  border: 1px solid rgba(201, 162, 39, 0.28);
  background: rgba(0, 0, 0, 0.28);
  color: var(--paper);
  font-size: 16px;
  font-variant-numeric: tabular-nums;
}

label.field input:focus,
label.field select:focus {
  outline: none;
  border-color: var(--gold);
}

.err {
  color: #f0a39b;
  font-size: 12px;
  min-height: 18px;
  margin: 6px 0 0;
}

.examples,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.actions {
  margin-top: 10px;
}

.chip,
.ghost-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--paper-dim);
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 12px;
  cursor: pointer;
}

.chip:hover,
.ghost-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.ghost-btn.primary {
  background: var(--vermilion);
  border-color: var(--vermilion);
  color: #fff7ea;
}

.ghost-btn.primary:hover {
  filter: brightness(1.08);
  color: #fff;
}

.ghost-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.ghost-btn.block {
  flex: 1 1 100%;
  width: 100%;
  border-radius: 8px;
  padding: 9px 12px;
}

.toast.warn {
  background: var(--warn);
}

.toast.danger {
  background: var(--vermilion);
}

.result {
  display: grid;
  gap: 8px;
  font-size: 13px;
}

.kv {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.22);
}

.kv span {
  color: var(--muted);
}

.kv b {
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  color: var(--paper);
}

.kv.main b {
  color: #ffd56a;
  font-size: 15px;
}

.tip {
  margin-top: 2px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 13px;
  line-height: 1.55;
}

.tip.ok {
  background: rgba(47, 111, 94, 0.22);
  border-color: rgba(61, 138, 116, 0.45);
}

.tip.warn {
  background: rgba(196, 122, 26, 0.16);
  border-color: rgba(196, 122, 26, 0.45);
}

.tip.danger {
  background: rgba(194, 58, 43, 0.16);
  border-color: rgba(194, 58, 43, 0.45);
}

.tip.info {
  background: rgba(201, 162, 39, 0.1);
  border-color: var(--line);
}

.empty-text {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.footer {
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.footer b {
  color: var(--paper-dim);
  font-weight: 600;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  background: var(--teal);
  color: #f4e9d4;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  z-index: 20;
}

.span-all {
  grid-column: 1 / -1;
}

@media (max-width: 1100px) {
  .layout,
  .layout-2 {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }
}