/* ===========================================================
   Monkeytype 中文指南 —— 样式
   配色参考 Monkeytype 默认主题：深灰底 + 黄色主色
   =========================================================== */

:root {
  --bg: #323437;
  --bg-soft: #2c2e31;
  --panel: #3a3c40;
  --border: #45474b;
  --text: #d1d0c5;
  --text-strong: #f2f1ea;
  --sub: #8a8d92;
  --main: #e2b714;
  --main-soft: rgba(226, 183, 20, 0.14);
  --error: #ca4754;
  --error-soft: rgba(202, 71, 84, 0.5);
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
  --radius: 12px;
  --radius-sm: 8px;

  --font-sans: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Roboto Mono", Menlo, Consolas, "Courier New", monospace;

  --f-lp: hsl(350 55% 58%);
  --f-lr: hsl(25 62% 56%);
  --f-lm: hsl(45 72% 52%);
  --f-li: hsl(75 42% 50%);
  --f-ri: hsl(160 42% 46%);
  --f-rm: hsl(190 46% 50%);
  --f-rr: hsl(215 52% 62%);
  --f-rp: hsl(270 42% 66%);
  --f-thumb: hsl(0 0% 60%);
}

[data-theme="light"] {
  --bg: #ececec;
  --bg-soft: #e0e0e0;
  --panel: #f6f6f6;
  --border: #d2d2d2;
  --text: #34363a;
  --text-strong: #1d1f22;
  --sub: #6d7075;
  --main: #a9820a;
  --main-soft: rgba(169, 130, 10, 0.12);
  --error: #c0394a;
  --error-soft: rgba(192, 57, 74, 0.45);
  --shadow: 0 16px 34px rgba(0, 0, 0, 0.1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--main); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.1em 0.4em;
}

/* ---------- 顶栏 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-strong);
  font-weight: 600;
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--main-soft);
  color: var(--main);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
}

.site-nav {
  display: flex;
  gap: 4px;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}
.site-nav::-webkit-scrollbar { display: none; }

.site-nav a {
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  color: var(--sub);
  font-size: 14px;
  white-space: nowrap;
}
.site-nav a:hover { color: var(--text); background: var(--bg-soft); text-decoration: none; }
.site-nav a.is-current { color: var(--main); background: var(--main-soft); }

.header-actions { display: flex; align-items: center; gap: 10px; }

/* ---------- 按钮 ---------- */

.primary-button,
.ghost-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}

.primary-button {
  background: var(--main);
  color: #23252a;
}
.primary-button:hover { text-decoration: none; transform: translateY(-1px); }

.ghost-button {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.ghost-button:hover { background: var(--bg-soft); border-color: var(--sub); }

.primary-button.large,
.ghost-button.large { font-size: 15px; padding: 11px 22px; }

/* ---------- 布局 ---------- */

main { max-width: 1120px; margin: 0 auto; padding: 0 24px 80px; }

.section {
  padding: 64px 0 8px;
  scroll-margin-top: 84px;
}

.section + .section { border-top: 1px solid var(--border); }

h1 {
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.25;
  margin: 0 0 16px;
  color: var(--text-strong);
  letter-spacing: -0.5px;
}

h2 {
  font-size: clamp(22px, 3vw, 28px);
  margin: 0 0 12px;
  color: var(--text-strong);
  letter-spacing: -0.3px;
}

h3 { font-size: 17px; margin: 0 0 8px; color: var(--text-strong); }
h4 { font-size: 15px; margin: 0 0 6px; color: var(--text-strong); }

.sub-heading {
  margin: 40px 0 10px;
  padding-left: 12px;
  border-left: 3px solid var(--main);
  font-size: 18px;
}

.section-lede { max-width: 78ch; color: var(--text); margin: 0 0 24px; }
.note { color: var(--sub); font-size: 14px; margin-top: 16px; max-width: 78ch; }

/* ---------- 首屏 ---------- */

.hero {
  padding: 72px 0 24px;
  max-width: 820px;
  scroll-margin-top: 84px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--main);
  margin: 0 0 12px;
}

.lede { font-size: 17px; color: var(--text); margin: 0 0 28px; }

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 32px; }

.fact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  font-size: 14px;
  color: var(--sub);
}
.fact-list li { display: flex; gap: 8px; align-items: baseline; }
.fact-list strong { color: var(--text); font-weight: 600; }

/* ---------- 卡片 ---------- */

.card-grid { display: grid; gap: 16px; }
.card-grid.three { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.card p { margin: 0; font-size: 14.5px; color: var(--text); }

.step-card { position: relative; padding-top: 46px; }
.step-index {
  position: absolute;
  top: 16px;
  left: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--main);
  letter-spacing: 1px;
}

/* ---------- 表格 ---------- */

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  min-width: 640px;
}

.data-table th,
.data-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.data-table thead th {
  background: var(--bg-soft);
  color: var(--sub);
  font-size: 12.5px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  white-space: nowrap;
}

.data-table tbody tr:last-child td { border-bottom: none; }
.data-table td:first-child { color: var(--sub); white-space: nowrap; font-size: 13px; }
.data-table td.value {
  font-family: var(--font-mono);
  color: var(--main);
  white-space: nowrap;
}

/* ---------- 列表 ---------- */

.plain-list { margin: 0 0 8px; padding-left: 20px; }
.plain-list li { margin-bottom: 8px; max-width: 82ch; }

.mistake-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
.mistake-list li {
  position: relative;
  padding: 12px 16px 12px 44px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--error);
  border-radius: var(--radius-sm);
  font-size: 14.5px;
}
.mistake-list li::before {
  content: "×";
  position: absolute;
  left: 18px;
  top: 12px;
  color: var(--error);
  font-size: 17px;
  font-weight: 700;
}

/* ---------- 模拟配置条 ---------- */

.mk-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 14px 16px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
  margin-bottom: 16px;
}

.mk-item {
  padding: 4px 9px;
  border-radius: 6px;
  color: var(--sub);
}
.mk-item.is-active { color: var(--main); background: var(--main-soft); }
.mk-sep { width: 1px; height: 18px; background: var(--border); margin: 0 6px; }

/* ---------- 方案 tabs ---------- */

.preset-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }

.preset-tab {
  font-family: inherit;
  font-size: 14px;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--sub);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.preset-tab:hover { color: var(--text); background: var(--bg-soft); }
.preset-tab.is-active {
  background: var(--main-soft);
  border-color: var(--main);
  color: var(--main);
  font-weight: 600;
}

.preset-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.preset-panel[hidden] { display: none; }
.preset-goal { margin: 0 0 12px; color: var(--main); font-weight: 600; }
.preset-panel .plain-list { margin-bottom: 0; }

/* ---------- 设置清单 ---------- */

.checklist { display: grid; gap: 8px; margin-top: 4px; }

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14.5px;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.check-item:hover { border-color: var(--sub); }

.check-item input {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 5px 0 0;
  border: 2px solid var(--border);
  border-radius: 5px;
  cursor: pointer;
  position: relative;
}
.check-item input:checked { border-color: var(--main); background: var(--main-soft); }
.check-item input:checked::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 0px;
  width: 5px;
  height: 10px;
  border: solid var(--main);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.check-item input:checked ~ span { color: var(--sub); text-decoration: line-through; }

/* ---------- 键盘图 ---------- */

.keyboard-wrap {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  overflow-x: auto;
}

.keyboard {
  display: grid;
  gap: 6px;
  min-width: 520px;
}

/* 24 列网格：每个键占 2 列，行内用 --start 制造真实键盘的左右错位。
   四行总宽一致，所以竖向的列能对齐。 */
.kbd-row {
  display: grid;
  grid-template-columns: repeat(24, 1fr);
  gap: 6px;
}

.kbd-row > .key { grid-column-end: span 2; }
.kbd-row > .key:nth-child(1) { grid-column-start: var(--start, 1); }
.kbd-row > .key:nth-child(2) { grid-column-start: calc(var(--start, 1) + 2); }
.kbd-row > .key:nth-child(3) { grid-column-start: calc(var(--start, 1) + 4); }
.kbd-row > .key:nth-child(4) { grid-column-start: calc(var(--start, 1) + 6); }
.kbd-row > .key:nth-child(5) { grid-column-start: calc(var(--start, 1) + 8); }
.kbd-row > .key:nth-child(6) { grid-column-start: calc(var(--start, 1) + 10); }
.kbd-row > .key:nth-child(7) { grid-column-start: calc(var(--start, 1) + 12); }
.kbd-row > .key:nth-child(8) { grid-column-start: calc(var(--start, 1) + 14); }
.kbd-row > .key:nth-child(9) { grid-column-start: calc(var(--start, 1) + 16); }
.kbd-row > .key:nth-child(10) { grid-column-start: calc(var(--start, 1) + 18); }

.kbd-row.row-q { --start: 3; }
.kbd-row.row-z { --start: 5; }

.key {
  display: grid;
  place-items: center;
  height: 46px;
  border-radius: var(--radius-sm);
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--key-color, var(--sub));
  background: var(--bg-soft);
  background: color-mix(in srgb, var(--key-color, var(--sub)) 16%, transparent);
  position: relative;
}
.key.base::after {
  content: "";
  position: absolute;
  bottom: 7px;
  width: 14px;
  height: 2px;
  background: currentColor;
  opacity: 0.7;
}
.key.bump::before {
  content: "";
  position: absolute;
  bottom: 4px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
}

.key.wide { grid-column: 7 / span 12; font-size: 13px; letter-spacing: 2px; }

.key.f-lp { --key-color: var(--f-lp); }
.key.f-lr { --key-color: var(--f-lr); }
.key.f-lm { --key-color: var(--f-lm); }
.key.f-li { --key-color: var(--f-li); }
.key.f-ri { --key-color: var(--f-ri); }
.key.f-rm { --key-color: var(--f-rm); }
.key.f-rr { --key-color: var(--f-rr); }
.key.f-rp { --key-color: var(--f-rp); }
.key.f-thumb { --key-color: var(--f-thumb); }

.finger-legend {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 13.5px;
  color: var(--sub);
}
.finger-legend li { display: flex; align-items: center; gap: 7px; }

.swatch {
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--key-color, var(--sub));
  border: 1px solid currentColor;
}
.swatch.f-lp { --key-color: var(--f-lp); color: var(--f-lp); }
.swatch.f-lr { --key-color: var(--f-lr); color: var(--f-lr); }
.swatch.f-lm { --key-color: var(--f-lm); color: var(--f-lm); }
.swatch.f-li { --key-color: var(--f-li); color: var(--f-li); }
.swatch.f-ri { --key-color: var(--f-ri); color: var(--f-ri); }
.swatch.f-rm { --key-color: var(--f-rm); color: var(--f-rm); }
.swatch.f-rr { --key-color: var(--f-rr); color: var(--f-rr); }
.swatch.f-rp { --key-color: var(--f-rp); color: var(--f-rp); }
.swatch.f-thumb { --key-color: var(--f-thumb); color: var(--f-thumb); }

/* ---------- 时间线 ---------- */

.timeline { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }

.timeline li {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 20px;
  align-items: start;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.timeline h3 { margin-bottom: 4px; }
.timeline p { margin: 0; font-size: 14.5px; }

.time-chip {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--main);
  background: var(--main-soft);
  border-radius: 6px;
  padding: 4px 8px;
  text-align: center;
}

/* ---------- 打字小测 ---------- */

.demo-shell {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.demo-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.demo-durations { display: flex; gap: 6px; }

.duration-button {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--sub);
  cursor: pointer;
}
.duration-button:hover { color: var(--text); }
.duration-button.is-active { color: var(--main); border-color: var(--main); background: var(--main-soft); }

.demo-live {
  margin-left: auto;
  display: flex;
  gap: 24px;
}
.demo-live div { text-align: right; }
.demo-live span {
  display: block;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--main);
  line-height: 1.2;
}
.demo-live small { font-size: 11.5px; color: var(--sub); }

.demo-typing {
  position: relative;
  height: 132px;
  overflow: hidden;
  padding: 6px 2px;
  cursor: text;
  outline: none;
  border-radius: var(--radius-sm);
  transition: box-shadow 0.15s ease;
}
.demo-typing:focus-visible { box-shadow: 0 0 0 2px var(--main-soft); }

.demo-words {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 44px;
  color: var(--sub);
  user-select: none;
  word-break: break-word;
}

.demo-words .word {
  display: inline-block;
  margin: 0 12px 0 0;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
.demo-words .word.active { border-bottom-color: var(--main); }
.demo-words .word.bad-word { border-bottom-color: var(--error-soft); }

.demo-words .letter { transition: color 0.05s linear; }
.demo-words .letter.ok { color: var(--text-strong); }
.demo-words .letter.bad { color: var(--error); }
.demo-words .letter.extra { opacity: 0.85; }

.demo-typing.is-blurred .demo-words { filter: blur(4px); }

.demo-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text);
  background: var(--bg-soft);
  background: color-mix(in srgb, var(--bg) 62%, transparent);
  backdrop-filter: blur(1px);
  pointer-events: none;
}
.demo-overlay[hidden] { display: none; }
.demo-overlay.is-passive { background: transparent; backdrop-filter: none; color: var(--sub); }

.demo-result {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.demo-result[hidden] { display: none; }

.demo-result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}
.demo-result-grid div {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}
.demo-result-grid span {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  color: var(--main);
  line-height: 1.3;
}
.demo-result-grid small { font-size: 12px; color: var(--sub); }
.demo-advice { margin: 14px 0 0; font-size: 14.5px; color: var(--text); }

/* ---------- FAQ ---------- */

.faq { display: grid; gap: 10px; }

.faq details {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
}
.faq details[open] { border-color: var(--main); }

.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text-strong);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--main);
  font-size: 18px;
}
.faq details[open] summary::after { content: "–"; }

.faq p { margin: 12px 0 0; font-size: 14.5px; }

/* ---------- 页脚 ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
}
.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 28px 24px 40px;
  color: var(--sub);
  font-size: 13.5px;
}
.footer-inner p { margin: 0 0 8px; max-width: 86ch; }
.footer-meta { font-family: var(--font-mono); font-size: 12.5px; }

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .header-inner { flex-wrap: wrap; gap: 12px; }
  .site-nav { order: 3; width: 100%; }
  .header-actions { margin-left: auto; }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  main { padding: 0 16px 64px; }
  .header-inner { padding: 10px 16px; }
  .section { padding-top: 48px; }
  .hero { padding-top: 48px; }
  .timeline li { grid-template-columns: 1fr; gap: 8px; }
  .time-chip { justify-self: start; }
  .demo-live { margin-left: 0; width: 100%; justify-content: space-between; gap: 12px; }
  .demo-live div { text-align: left; }
  .demo-words { font-size: 20px; line-height: 38px; }
  .demo-typing { height: 116px; }
  .brand-text { display: none; }
  .site-nav { overflow: visible; flex-wrap: wrap; }
  .section { scroll-margin-top: 120px; }
}