:root {
  --bg:        oklch(0.932 0.024 82);
  --bg-elev:   oklch(0.965 0.014 85);
  --bg-sunk:   oklch(0.895 0.020 80);
  --paper:     oklch(0.975 0.012 85);

  --ink:       oklch(0.22 0.012 60);
  --ink-2:     oklch(0.38 0.012 60);
  --ink-3:     oklch(0.55 0.012 70);
  --ink-4:     oklch(0.72 0.012 75);

  --line:      oklch(0.80 0.020 80);
  --line-2:    oklch(0.87 0.015 80);

  --zhusha:    oklch(0.52 0.17 30);
  --qing:      oklch(0.50 0.06 190);
  --jin:       oklch(0.62 0.10 75);

  --font-serif: 'Noto Serif SC', 'Songti SC', 'STSong', 'SimSun', serif;
  --font-sans:  'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
  --font-mono:  'JetBrains Mono', 'SF Mono', 'Menlo', 'Consolas', monospace;

  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 12px;

  --shadow-sm: 0 1px 3px oklch(0.22 0.012 60 / 0.06), 0 1px 1px oklch(0.22 0.012 60 / 0.04);
  --shadow-lg: 0 8px 32px oklch(0.22 0.012 60 / 0.12), 0 2px 8px oklch(0.22 0.012 60 / 0.06);
}

body[data-season="spring"] { --zhusha: oklch(0.54 0.17 30); }
body[data-season="summer"] { --zhusha: oklch(0.55 0.16 40); --qing: oklch(0.55 0.10 170); }
body[data-season="autumn"] { --zhusha: oklch(0.50 0.18 25); --jin: oklch(0.65 0.13 70); --bg: oklch(0.93 0.028 75); }
body[data-season="winter"] { --zhusha: oklch(0.48 0.14 15); --bg: oklch(0.94 0.015 220); --bg-sunk: oklch(0.90 0.018 220); }

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
button { font: inherit; color: inherit; }
svg { vertical-align: middle; }

.serif { font-family: var(--font-serif); font-weight: 400; }
.sans  { font-family: var(--font-sans); }
.mono  { font-family: var(--font-mono); }

.cn-caps {
  font-family: var(--font-serif);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.35em;
  color: var(--ink-3);
  text-indent: 0.35em;
}
.caps {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.25em;
  color: var(--ink-3);
  text-transform: uppercase;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  padding: 7px 14px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--ink);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color 0.18s, background 0.18s, color 0.18s;
  white-space: nowrap;
  text-decoration: none;
}
.btn:hover { border-color: var(--ink-3); background: var(--bg); }
.btn:active { transform: translateY(0.5px); }

.btn.sm { padding: 5px 10px; font-size: 12px; gap: 4px; }
.btn.lg { padding: 11px 22px; font-size: 14px; }

.btn.primary {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn.primary:hover { background: oklch(0.3 0.012 60); border-color: oklch(0.3 0.012 60); }

.btn.zhusha {
  background: var(--zhusha);
  color: var(--paper);
  border-color: var(--zhusha);
}
.btn.zhusha:hover { filter: brightness(1.08); border-color: var(--zhusha); }

.btn.ghost {
  background: transparent;
  border-color: transparent;
  color: var(--ink-2);
}
.btn.ghost:hover { background: var(--bg-sunk); border-color: transparent; color: var(--ink); }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-serif);
  font-size: 11px;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 100px;
  background: transparent;
  color: var(--ink-2);
  line-height: 1.6;
}
.pill.zhusha { border-color: var(--zhusha); color: var(--zhusha); background: oklch(from var(--zhusha) l c h / 0.05); }
.pill.qing   { border-color: var(--qing);   color: var(--qing);   background: oklch(from var(--qing) l c h / 0.05); }
.pill.jin    { border-color: var(--jin);    color: var(--jin);    background: oklch(from var(--jin) l c h / 0.05); }
.pill.filled { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.paper-bg {
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 20% 30%, oklch(0.22 0.012 60 / 0.02) 0.7px, transparent 0.7px),
    radial-gradient(circle at 70% 60%, oklch(0.22 0.012 60 / 0.02) 0.7px, transparent 0.7px),
    radial-gradient(circle at 45% 85%, oklch(0.22 0.012 60 / 0.015) 0.5px, transparent 0.5px);
  background-size: 64px 64px, 96px 96px, 128px 128px;
}

.seal {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: var(--zhusha);
  color: var(--paper);
  font-family: var(--font-serif);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: 0.08em;
  text-align: center;
  border-radius: 3px;
  box-shadow:
    inset 0 0 0 1.5px oklch(from var(--zhusha) calc(l - 0.08) c h),
    1.2px 1.2px 0 oklch(0.22 0.012 60 / 0.18);
  position: relative;
  user-select: none;
}
.seal::before {
  content: '';
  position: absolute;
  inset: 3px;
  border: 0.5px solid oklch(from var(--zhusha) calc(l - 0.1) c h / 0.6);
  border-radius: 1px;
  pointer-events: none;
}
.seal.sm { width: 34px; height: 34px; font-size: 9.5px; }
.seal.lg { width: 56px; height: 56px; font-size: 13px; }

kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 2px 6px;
  background: var(--bg-sunk);
  border: 1px solid var(--line-2);
  border-bottom-width: 2px;
  border-radius: 3px;
  color: var(--ink-3);
}

input, textarea { font: inherit; color: inherit; }
input:focus, textarea:focus { outline: none; }

*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { background: var(--line); border-radius: 4px; }
*::-webkit-scrollbar-thumb:hover { background: var(--ink-3); }

@keyframes ink-spread {
  0%   { opacity: 0; transform: scale(0.94); }
  100% { opacity: 1; transform: scale(1); }
}
@keyframes shake-tube {
  0%, 100% { transform: rotate(0); }
  25%      { transform: rotate(-8deg); }
  75%      { transform: rotate(8deg); }
}

.fade-in { animation: ink-spread 0.5s ease-out both; }

@media (max-width: 900px) {
  .map-workspace { display: block !important; min-width: 0 !important; height: auto !important; }
  .map-workspace > aside { border: none !important; }
}