:root {
  --ink: #1c1814;
  --ink-soft: #3a3228;
  --paper: #e8e0d2;
  --paper-deep: #d4c8b4;
  --wash: #c5b79a;
  --accent: #2f5d50;
  --accent-ink: #1e3d35;
  --line: rgba(40, 32, 24, 0.18);
  --danger: #7a3b2e;
  --font-display: "Songti SC", "STSong", "Noto Serif SC", "SimSun", serif;
  --font-ui: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(ellipse 90% 60% at 20% 0%, rgba(255, 255, 255, 0.35), transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 100%, rgba(47, 93, 80, 0.08), transparent 50%),
    linear-gradient(165deg, #d9d0c0 0%, #cfc4b0 45%, #b9ad96 100%);
  color: var(--ink);
  font-family: var(--font-ui);
}

.sz-page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 16px 16px 40px;
  min-height: 100vh;
}

.sz-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}
.sz-brand {
  text-align: center;
  flex: 1;
}
.sz-brand h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 600;
  letter-spacing: 0.28em;
  text-indent: 0.28em;
}
.sz-brand p {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
  letter-spacing: 0.12em;
}
.sz-back, .sz-ghost {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(255, 252, 245, 0.55);
  color: var(--ink-soft);
  padding: 8px 12px;
  border-radius: 8px;
  font: inherit;
  font-size: 13px;
  text-decoration: none;
  cursor: pointer;
}
.sz-back:hover, .sz-ghost:hover { background: rgba(255, 252, 245, 0.9); }

.sz-main {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.9fr);
  gap: 18px;
  align-items: start;
}

.sz-board {
  background:
    linear-gradient(180deg, rgba(255, 252, 245, 0.72), rgba(232, 224, 210, 0.9));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 18px 28px;
  min-height: 420px;
  box-shadow: 0 18px 40px rgba(40, 28, 18, 0.08);
  position: relative;
  overflow: hidden;
}
.sz-board::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(40, 32, 24, 0.08);
  border-radius: 10px;
  pointer-events: none;
}
.sz-status {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--ink-soft);
  padding: 80px 12px;
  font-family: var(--font-display);
  letter-spacing: 0.2em;
}
.sz-drop-banner {
  position: relative;
  z-index: 2;
  text-align: center;
  margin: 0 8px 12px;
  padding: 8px 12px;
  border-radius: 8px;
  background: rgba(47, 93, 80, 0.12);
  color: var(--accent-ink);
  font-size: 14px;
  font-family: var(--font-display);
  letter-spacing: 0.06em;
}
.sz-drop-banner strong {
  font-size: 18px;
  margin: 0 2px;
}
.sz-stack {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 20px;
  justify-items: center;
  padding: 12px 4px;
}
.sz-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  max-width: 100%;
}
.sz-char {
  width: clamp(48px, 10vw, 60px);
  height: clamp(48px, 10vw, 60px);
  display: grid;
  place-items: center;
  border: 1px solid rgba(40, 32, 24, 0.18);
  border-radius: 6px;
  background: rgba(255, 252, 245, 0.7);
  padding: 2px;
  box-sizing: border-box;
}
.sz-hanzi {
  display: block;
  overflow: visible;
}
.sz-stroke-flash {
  filter: drop-shadow(0 0 3px rgba(47, 93, 80, 0.55));
}

.sz-unlocked {
  display: grid;
  gap: 6px;
}
.sz-unlocked-label {
  font-size: 12px;
  color: var(--ink-soft);
}
.sz-unlocked-bar {
  min-height: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  color: var(--ink-soft);
  font-size: 13px;
}
.sz-unlocked-bar .sz-chip {
  display: inline-grid;
  place-items: center;
  min-width: 28px;
  height: 24px;
  padding: 0 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: var(--font-display);
  color: #f4f1ea;
  background: var(--accent);
}

.sz-panel {
  background: rgba(255, 252, 245, 0.7);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  display: grid;
  gap: 14px;
}
.sz-mode {
  display: grid;
  gap: 8px;
}
.sz-mode-label {
  font-size: 12px;
  color: var(--ink-soft);
}
.sz-mode-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.sz-mode-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: #fffaf3;
  color: var(--ink-soft);
  padding: 10px 12px;
  border-radius: 10px;
  font: inherit;
  font-size: 15px;
  cursor: pointer;
}
.sz-mode-btn.active {
  background: var(--accent);
  border-color: transparent;
  color: #f4f1ea;
}
.sz-hint.muted-more {
  font-size: 12px;
  opacity: 0.92;
}
.sz-meters {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.sz-meter {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.45);
  display: grid;
  gap: 4px;
}
.sz-meter span {
  font-size: 12px;
  color: var(--ink-soft);
}
.sz-meter strong {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
}
.sz-hint {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-soft);
}
.sz-actions {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 8px;
}
.sz-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: #fffaf3;
  color: var(--ink);
  padding: 11px 14px;
  border-radius: 10px;
  font: inherit;
  font-size: 15px;
  cursor: pointer;
}
.sz-btn:hover { filter: brightness(0.98); }
.sz-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.sz-btn.primary {
  background: var(--accent);
  border-color: transparent;
  color: #f4f1ea;
}
.sz-btn.primary:hover { background: var(--accent-ink); }
#btnLose {
  color: var(--danger);
}

.sz-guess label {
  display: block;
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 6px;
}
.sz-guess-row {
  display: flex;
  gap: 8px;
}
.sz-guess-row input {
  flex: 1;
  min-width: 0;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font: inherit;
  background: #fff;
}
.sz-win {
  border-top: 1px solid var(--line);
  padding-top: 12px;
  display: grid;
  gap: 8px;
}
.sz-win h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 24px;
  letter-spacing: 0.12em;
}
.sz-win p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.sz-win-content {
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink) !important;
  white-space: pre-wrap;
}

@media (max-width: 820px) {
  .sz-main { grid-template-columns: 1fr; }
  .sz-board { min-height: 300px; }
}