/* ============================================================
   语义猜词 · 纸墨 × 热度
   方向:暖纸底 + 衬线汉字 + 青灰→琥珀→朱红的关联度色阶,
   猜中时刻 = 朱红印章。移动优先。
   ============================================================ */

:root {
  /* 纸墨 */
  --paper: #f4efe4;
  --paper-deep: #ece5d4;
  --card: #fdfbf4;
  --ink: #2b2620;
  --ink-soft: #7a7057;
  --ink-faint: #a89e85;
  --line: #e2d9c2;

  /* 热度色阶(关联度的视觉语言) */
  --heat-cold: #93a1ab;
  --heat-warm: #c8a24b;
  --heat-hot: #d97e35;
  --heat-blazing: #c8472e;

  /* 印泥 */
  --seal: #b23430;
  --seal-deep: #8c2723;

  /* 字体 */
  --font-display: "Songti SC", "Noto Serif SC", "STZhongsong", "SimSun", serif;
  --font-body: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;

  /* 节奏 */
  --radius: 10px;
  --dur: 320ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100dvh;
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.55;
  /* 纸的氛围:暖底 + 两团极淡的光晕 + 细密纸纹 */
  background:
    radial-gradient(52rem 30rem at 85% -8%, #fbf7ec 0%, transparent 60%),
    radial-gradient(40rem 26rem at -12% 38%, #efe6cf88 0%, transparent 62%),
    repeating-linear-gradient(0deg, transparent 0 3px, #00000004 3px 4px),
    var(--paper);
}

button, input { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; background: none; padding: 0; }
button:disabled { cursor: not-allowed; opacity: 0.45; }

/* ---------- 骨架:居中单列 ---------- */

.shell {
  width: min(31rem, 100% - 2rem);
  margin-inline: auto;
  padding: clamp(16px, 4vw, 28px) 0 72px;
}

/* ---------- 顶栏 ---------- */

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: clamp(18px, 5vw, 30px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
}

/* 品牌前的小印 */
.brand::before {
  content: "猜";
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 7px;
  background: var(--seal);
  color: #fdf6ee;
  font-size: 16px;
  letter-spacing: 0;
  box-shadow: 0 2px 8px #b2343044, inset 0 0 0 1.5px #ffffff2e;
  transform: rotate(-4deg);
}

#status {
  margin: 0;
  font-size: 13px;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
}

/* ---------- 题面卡 ---------- */

.prompt-card {
  position: relative;
  padding: clamp(20px, 5vw, 30px) clamp(18px, 5vw, 28px) 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 1px 0 #fff inset, 0 14px 34px -22px #4a3d2455;
}

.difficulty-picker {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
}

.difficulty-picker[hidden] { display: none; }

.difficulty-picker button,
.example-chips button {
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fffdf8;
  color: var(--ink-soft);
  font-size: 13px;
}

.difficulty-picker button.active {
  border-color: var(--seal);
  background: var(--seal);
  color: #fffaf2;
}

h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 8vw, 40px);
  letter-spacing: 0.06em;
  line-height: 1.2;
}

.prompt-sub {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
}

/* 关联度色阶图例:教会玩家颜色语言 */
.heat-legend {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
}

.heat-strip {
  flex: 1;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--heat-cold), var(--heat-warm) 45%, var(--heat-hot) 72%, var(--heat-blazing));
  box-shadow: inset 0 0 0 1px #00000014;
}

/* ---------- 输入区 ---------- */

form { margin-top: 14px; }

label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  letter-spacing: 0.1em;
}

.input-row { display: flex; gap: 8px; }

input {
  min-width: 0;
  flex: 1;
  height: 52px;
  padding: 0 16px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  background: #fffdf8;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.35em;
  outline: none;
  transition: border-color var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
}

input:focus {
  border-color: var(--heat-hot);
  box-shadow: 0 0 0 3px #d97e3522;
}

input::placeholder { color: var(--ink-faint); letter-spacing: 0.1em; font-size: 15px; font-family: var(--font-body); font-weight: 400; }

/* 按钮体系:主(墨) / 次(琥珀笺) / 弱(线框) */
.btn-primary,
.input-row button[type="submit"],
.result button {
  height: 52px;
  padding: 0 20px;
  border-radius: var(--radius);
  background: var(--ink);
  color: #f8f4ea;
  font-weight: 650;
  letter-spacing: 0.06em;
  transition: transform 160ms var(--ease-out), box-shadow 160ms var(--ease-out);
  box-shadow: 0 6px 16px -8px #2b262099;
}

.btn-primary:active,
.input-row button[type="submit"]:active { transform: translateY(1px) scale(0.99); }

#hint {
  height: 52px;
  padding: 0 14px;
  border-radius: var(--radius);
  background: #f7ead0;
  border: 1px solid #e5cf9c;
  color: #8a6414;
  font-weight: 650;
  white-space: nowrap;
}

.round-tools {
  display: flex;
  gap: 14px;
  justify-content: flex-end;
  margin-top: 12px;
}

.round-tools button {
  font-size: 13px;
  color: var(--ink-soft);
  padding: 6px 2px;
  border-bottom: 1px dashed var(--ink-faint);
  border-radius: 0;
  letter-spacing: 0.06em;
}

.round-tools button:not(:disabled):hover { color: var(--ink); border-bottom-color: var(--ink); }

/* 朱批(错误提示) */
.toast {
  min-height: 22px;
  margin: 10px 2px 0;
  font-size: 13px;
  color: var(--seal);
  font-weight: 600;
}

/* ---------- 结果区 ---------- */

.result {
  position: relative;
  margin-top: 18px;
  padding: 22px 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.result p { margin: 8px 0 0; color: var(--ink-soft); font-size: 14px; }

.result ul {
  margin: 12px 0 0;
  padding-left: 20px;
  columns: 2;
  column-gap: 24px;
  font-size: 14px;
  color: var(--ink-soft);
}

.result li { margin: 3px 0; }

/* 答案 = 一枚朱红印章 */
.answer-seal {
  display: inline-grid;
  place-items: center;
  min-width: 108px;
  padding: 14px 18px 12px;
  border: 3px solid var(--seal);
  border-radius: 10px;
  color: var(--seal);
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 800;
  letter-spacing: 0.12em;
  transform: rotate(-3deg);
  box-shadow: inset 0 0 0 1.5px #b2343022, 0 2px 0 #b2343011;
  background:
    radial-gradient(120% 90% at 30% 20%, #b234300d, transparent 55%),
    #fdfbf4;
}

.result.won .answer-seal {
  animation: stamp 460ms var(--ease-out) both;
}

@keyframes stamp {
  0% { opacity: 0; transform: rotate(-10deg) scale(1.7); }
  62% { opacity: 1; transform: rotate(-2deg) scale(0.96); }
  100% { opacity: 1; transform: rotate(-3deg) scale(1); }
}

.result-eyebrow {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--ink-faint);
  font-weight: 700;
}

.result.won .result-eyebrow { color: var(--seal); }

.trajectory { display: block; width: 100%; height: 58px; margin: 14px 0 2px; color: var(--seal); }

.result button { margin-top: 12px; width: 100%; }

.share-fallback {
  width: 100%;
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px;
  font-size: 12px;
  background: #fffdf8;
}

/* ---------- 榜单 ---------- */

.board-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin: clamp(24px, 6vw, 34px) 2px 10px;
}

h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

#guess-count { font-size: 12px; color: var(--ink-faint); letter-spacing: 0.08em; }

/* 提示笺 */
.hints:empty { display: none; }

.hints {
  margin: 0 0 12px;
  padding: 12px 14px;
  background: #faf3df;
  border: 1px solid #ecd9a8;
  border-left: 4px solid var(--heat-warm);
  border-radius: 8px;
}

.hint-row {
  margin: 4px 0;
  font-size: 13.5px;
  font-weight: 600;
  color: #7d5c12;
}

.labels {
  display: flex;
  justify-content: space-between;
  padding: 0 14px 6px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
}

/* 空榜单引导:盲测玩家没有说明书,这里就是说明书 */
.empty-guide {
  padding: 26px 20px;
  border: 1.5px dashed var(--line);
  border-radius: var(--radius);
  color: var(--ink-faint);
  font-size: 13.5px;
  line-height: 1.8;
  text-align: center;
}

.guesses:not(:empty) + .empty-guide { display: none; }

.empty-guide p { margin: 0 0 12px; }

.example-chips { display: flex; justify-content: center; gap: 8px; }

.example-chips button:not(:disabled):hover {
  border-color: var(--heat-hot);
  color: var(--seal);
}

/* 猜词行:热度条即信息 */
.guess-row {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  overflow: hidden;
  margin: 6px 0;
  padding: 12px 14px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
}

.guess-row > span { position: relative; z-index: 1; }

.guess-word {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.guess-metric { display: flex; align-items: center; gap: 8px; }

.guess-score {
  font-variant-numeric: tabular-nums;
  font-weight: 750;
  font-size: 15px;
}

.band {
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--paper-deep);
  white-space: nowrap;
}

/* 热度条:按分数上色 */
.bar {
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: var(--radius) 0 0 var(--radius);
  opacity: 0.16;
  transition: width 500ms var(--ease-out);
}

.cold    { color: inherit; }
.cold    .bar { background: var(--heat-cold); }
.cold    .guess-score { color: #6c7a84; }
.warm    .bar { background: var(--heat-warm); }
.warm    .guess-score { color: #8a6414; }
.hot     .bar { background: var(--heat-hot); opacity: 0.2; }
.hot     .guess-score { color: #a85312; }
.blazing .bar { background: var(--heat-blazing); opacity: 0.22; }
.blazing .guess-score { color: var(--seal); }
.blazing .guess-word { color: var(--seal-deep); }

/* 最新一猜:左侧墨签 + 滑入 */
.guess-row.latest { border-color: #cdbf9d; box-shadow: 0 4px 14px -10px #4a3d2466; }

.guess-row.latest::after {
  content: "新";
  position: absolute;
  z-index: 1;
  top: 50%;
  right: -1px;
  translate: 0 -50%;
  writing-mode: vertical-rl;
  padding: 5px 3px;
  border-radius: 6px 0 0 6px;
  background: var(--ink);
  color: #f8f4ea;
  font-size: 10px;
  letter-spacing: 0.1em;
}

.guess-row.latest .band { margin-right: 14px; }

@keyframes slide-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

.guess-row.latest { animation: slide-in var(--dur) var(--ease-out); }

/* 猜中行:满幅朱红 */
.guess-row.answer {
  background: linear-gradient(100deg, var(--seal), var(--seal-deep));
  border-color: var(--seal-deep);
  color: #fdf6ee;
}

.guess-row.answer .guess-word,
.guess-row.answer .guess-score { color: #fdf6ee; }

.guess-row.answer .bar { display: none; }

/* ---------- 动效尊重 ---------- */

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ---------- 窄屏微调 ---------- */

@media (max-width: 420px) {
  .input-row { flex-wrap: wrap; }
  .input-row input { flex-basis: 100%; }
  .input-row button[type="submit"] { flex: 1; }
  .result ul { columns: 1; }
}

/* 类别段整体换行,书名号不拆开 */
.prompt-category { white-space: nowrap; }