/* ============================================================
   TypeScript 学习站 · 纯静态站样式
   移植自原 Vite/React/Tailwind 版(src/styles/globals.css +
   tailwind.config.ts 语义色 + 各组件 utility)。
   主题机制:<html data-theme="parchment|dracula"> + RGB 三通道变量。
   ============================================================ */

/* ===== 主题变量:护眼米色(默认) / 德古拉深色 ===== */
:root,
[data-theme="parchment"] {
  color-scheme: light;
  --bg-base: 233 226 212; /* #e9e2d4 羊皮纸 */
  --bg-card: 244 239 228; /* #f4efe4 */
  --bg-elev: 227 219 204; /* #e3dbcc */
  --border-subtle: 212 203 184; /* #d4cbb8 */
  --border-strong: 168 158 136; /* #a89e88 */
  --accent: 139 90 107; /* #8b5a6b 哑光粉 */
  --drac-bg: 233 226 212;
  --drac-line: 212 203 184;
  --drac-fg: 47 43 38; /* #2f2b26 深墨 */
  --drac-comment: 122 114 104; /* #7a7268 */
  --drac-cyan: 58 107 124; /* #3a6b7c */
  --drac-green: 63 107 60; /* #3f6b3c */
  --drac-orange: 160 95 40; /* #a05f28 */
  --drac-pink: 139 90 107; /* #8b5a6b */
  --drac-purple: 74 107 92; /* #4a6b5c */
  --drac-red: 168 90 82; /* #a85a52 */
  --drac-yellow: 154 123 46; /* #9a7b2e */
  --scroll-thumb: 201 191 169;
  --scroll-thumb-hover: 168 158 136;
  --code-chip-bg: 214 226 204; /* #d6e2cc 偏绿芯片,和羊皮纸底拉开 */
  --code-chip-fg: 22 72 38; /* #164826 */
  --code-chip-border: 176 196 160;
}

[data-theme="dracula"] {
  color-scheme: dark;
  --bg-base: 13 14 19; /* #0d0e13 */
  --bg-card: 24 26 34; /* #181a22 */
  --bg-elev: 35 38 47; /* #23262f */
  --border-subtle: 54 58 72; /* #363a48 */
  --border-strong: 139 144 184; /* #8b90b8 */
  --accent: 255 79 163; /* #ff4fa3 */
  --drac-bg: 13 14 19;
  --drac-line: 68 71 90;
  --drac-fg: 255 255 255;
  --drac-comment: 125 131 168;
  --drac-cyan: 139 233 253;
  --drac-green: 80 250 123;
  --drac-orange: 255 184 108;
  --drac-pink: 255 79 163;
  --drac-purple: 189 147 249;
  --drac-red: 255 85 85;
  --drac-yellow: 241 250 140;
  --scroll-thumb: 68 71 90;
  --scroll-thumb-hover: 98 114 164;
  --code-chip-bg: 68 71 90;
  --code-chip-fg: 80 250 123;
  --code-chip-border: 68 71 90;
}

/* 终端区固定深色(night 系),不随主题变 */
:root {
  --night-bg: #0d0e13;
  --night-card: #14161d;
  --night-elev: #23262f;
  --night-line: #2e3140;
  --night-fg: #f8f8f2;
  --night-comment: #7d83a8;
  --night-cyan: #8be9fd;
  --night-green: #50fa7b;
  --night-orange: #ffb86c;
  --night-pink: #ff4fa3;
  --night-purple: #bd93f9;
  --night-red: #ff5555;
  --night-yellow: #f1fa8c;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;
}

/* ===== 基础 ===== */
html,
body {
  height: 100%;
  margin: 0;
}

body {
  background: rgb(var(--bg-base));
  color: rgb(var(--drac-fg));
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    sans-serif;
  -webkit-font-smoothing: antialiased;
  transition:
    background-color 0.25s ease,
    color 0.25s ease;
}

a {
  color: inherit;
  text-decoration: none;
}

/* 滚动条 */
*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
*::-webkit-scrollbar-track {
  background: rgb(var(--bg-base));
}
*::-webkit-scrollbar-thumb {
  background: rgb(var(--scroll-thumb));
  border-radius: 6px;
  border: 2px solid rgb(var(--bg-base));
}
*::-webkit-scrollbar-thumb:hover {
  background: rgb(var(--scroll-thumb-hover));
}

/* ===== 布局外壳 ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgb(var(--border-subtle));
  background: rgb(var(--bg-base) / 0.95);
  backdrop-filter: blur(8px);
}
.topbar-inner {
  max-width: 72rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: rgb(var(--drac-fg));
}
.brand .brand-logo {
  color: rgb(var(--accent));
}
.topnav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.875rem;
}
.topnav .nav-link {
  border-radius: 0.375rem;
  padding: 0.375rem 0.75rem;
  color: rgb(var(--drac-comment));
  transition: color 0.15s ease, background-color 0.15s ease;
}
.topnav .nav-link:hover,
.topnav .nav-link.active {
  color: rgb(var(--drac-fg));
}
.topnav .nav-link.active {
  background: rgb(var(--bg-elev));
}

/* 主题切换 */
.theme-toggle {
  display: inline-flex;
  border-radius: 0.5rem;
  border: 1px solid rgb(var(--border-subtle));
  background: rgb(var(--bg-card));
  padding: 0.125rem;
}
.theme-toggle button {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  border: 0;
  border-radius: 0.375rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  background: transparent;
  color: rgb(var(--drac-comment));
  cursor: pointer;
  transition: color 0.15s ease, background-color 0.15s ease;
}
.theme-toggle button:hover {
  color: rgb(var(--drac-fg));
}
.theme-toggle button.active {
  background: rgb(var(--accent) / 0.15);
  font-weight: 500;
  color: rgb(var(--accent));
}
.theme-toggle .tt-text {
  display: none;
}
@media (min-width: 640px) {
  .theme-toggle .tt-text {
    display: inline;
  }
}

/* 头部进度 */
.header-progress {
  display: none;
  min-width: 0;
  max-width: 14rem;
  flex: 1 1 0%;
}
@media (min-width: 640px) {
  .header-progress {
    display: block;
  }
}
.header-progress .hp-label {
  margin-bottom: 0.25rem;
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgb(var(--drac-comment));
}

.wrap {
  max-width: 72rem;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}
.site-footer {
  max-width: 72rem;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  text-align: center;
  font-size: 0.75rem;
  color: rgb(var(--drac-comment));
}

/* ===== 进度条 ===== */
.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  margin-bottom: 0.25rem;
  color: rgb(var(--drac-comment));
}
.progress-track {
  width: 100%;
  border-radius: 9999px;
  background: rgb(var(--bg-elev));
  overflow: hidden;
}
.progress-track.sm {
  height: 0.375rem;
}
.progress-track.md {
  height: 0.625rem;
}
.progress-fill {
  height: 100%;
  border-radius: 9999px;
  background: rgb(var(--drac-green));
  transition: width 0.3s ease;
}

/* ===== 首页:hero / 统计 / 步骤 ===== */
.hero {
  position: relative;
  overflow: hidden;
  border-radius: 1rem;
  border: 1px solid rgb(var(--border-subtle));
  background: linear-gradient(to bottom, rgb(var(--bg-card)), rgb(var(--bg-base)));
  padding: 2rem;
}
@media (min-width: 640px) {
  .hero {
    padding: 3rem;
  }
}
.hero .hero-watermark {
  position: absolute;
  right: 1.5rem;
  top: 1.5rem;
  user-select: none;
  font-family: var(--font-mono);
  font-size: 3.75rem;
  opacity: 0.1;
}
.hero .hero-kicker {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgb(var(--accent));
}
.hero h1 {
  margin: 0.5rem 0 0;
  max-width: 42rem;
  font-size: 1.875rem;
  font-weight: 700;
  line-height: 1.25;
  color: rgb(var(--drac-fg));
}
@media (min-width: 640px) {
  .hero h1 {
    font-size: 2.25rem;
  }
}
.hero h1 .hero-accent {
  color: rgb(var(--accent));
}
.hero .hero-sub {
  margin: 1rem 0 0;
  max-width: 42rem;
  color: rgb(var(--drac-comment));
}
.hero .hero-stats {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.875rem;
}
.hero .hero-progress-wrap {
  margin-top: 1.5rem;
  max-width: 36rem;
}
.hero .hero-progress-note {
  margin: 0.5rem 0 0;
  font-size: 0.75rem;
  color: rgb(var(--drac-comment));
}
.stat .stat-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: rgb(var(--drac-fg));
}
.stat .stat-label {
  font-size: 0.75rem;
  color: rgb(var(--drac-comment));
}

.section-title {
  margin-bottom: 1rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: rgb(var(--drac-fg));
}
.steps-grid {
  display: grid;
  gap: 1rem;
}
@media (min-width: 640px) {
  .steps-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.step-card {
  border-radius: 0.75rem;
  border: 1px solid rgb(var(--border-subtle));
  background: rgb(var(--bg-card));
  padding: 1.25rem;
}
.step-card .step-no {
  display: flex;
  height: 2rem;
  width: 2rem;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  background: rgb(var(--accent) / 0.15);
  font-size: 0.875rem;
  font-weight: 700;
  color: rgb(var(--accent));
}
.step-card h3 {
  margin: 0.75rem 0 0;
  font-weight: 600;
  color: rgb(var(--drac-fg));
}
.step-card p {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  color: rgb(var(--drac-comment));
}

/* ===== 首页:模块区块 + 章节行 ===== */
.module-section {
  border-radius: 1rem;
  border: 1px solid rgb(var(--border-subtle));
  background: rgb(var(--bg-card));
  padding: 1.25rem 1.25rem 0.5rem;
}
.module-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
}
.module-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgb(var(--accent));
}
.module-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: rgb(var(--drac-fg));
}
.module-sub {
  font-size: 0.875rem;
  color: rgb(var(--drac-comment));
}
.module-progress-wrap {
  margin: 0.75rem 0 1rem;
  max-width: 20rem;
}
.chapter-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-bottom: 0.75rem;
}
.chapter-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-radius: 0.5rem;
  border: 1px solid rgb(var(--border-subtle));
  background: rgb(var(--bg-base));
  padding: 0.75rem;
  transition:
    border-color 0.15s ease,
    background-color 0.15s ease;
}
.chapter-row.ready:hover {
  border-color: rgb(var(--accent) / 0.5);
  background: rgb(var(--bg-elev));
}
.chapter-row.learned {
  border-color: rgb(var(--drac-green) / 0.3);
}
.chapter-row.not-ready {
  opacity: 0.7;
}
.complete-toggle-btn {
  display: flex;
  height: 2.25rem;
  width: 2.25rem;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border-radius: 0.375rem;
  border: 1px solid rgb(var(--border-subtle));
  background: rgb(var(--bg-elev));
  font-size: 0.875rem;
  color: rgb(var(--drac-comment));
  cursor: pointer;
  transition:
    border-color 0.15s ease,
    color 0.15s ease,
    background-color 0.15s ease;
}
.complete-toggle-btn:hover:not(:disabled) {
  border-color: rgb(var(--drac-green) / 0.4);
  color: rgb(var(--drac-green));
}
.complete-toggle-btn.on {
  border-color: rgb(var(--drac-green) / 0.5);
  background: rgb(var(--drac-green) / 0.15);
  color: rgb(var(--drac-green));
}
.complete-toggle-btn:disabled {
  cursor: not-allowed;
}
.chapter-link {
  display: flex;
  min-width: 0;
  flex: 1 1 0%;
  align-items: center;
  gap: 1rem;
  padding: 0.25rem 0;
}
.chapter-num {
  display: flex;
  height: 2.25rem;
  width: 2.25rem;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border-radius: 0.375rem;
  background: rgb(var(--bg-elev));
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: rgb(var(--drac-comment));
}
.chapter-row.ready:hover .chapter-num {
  color: rgb(var(--accent));
}
.chapter-info {
  min-width: 0;
  flex: 1 1 0%;
}
.chapter-title {
  font-weight: 500;
  color: rgb(var(--drac-fg));
}
.chapter-meta {
  font-size: 0.75rem;
  color: rgb(var(--drac-comment));
}
.chapter-meta.done {
  color: rgb(var(--drac-green));
}
.chapter-arrow {
  color: rgb(var(--border-strong));
  transition:
    transform 0.15s ease,
    color 0.15s ease;
}
.chapter-row.ready:hover .chapter-arrow {
  transform: translateX(2px);
  color: rgb(var(--accent));
}

/* 运行方式徽章 */
.runmode-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  border-radius: 9999px;
  padding: 0.125rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
}
.runmode-badge.browser {
  border: 1px solid rgb(var(--drac-green) / 0.3);
  background: rgb(var(--drac-green) / 0.1);
  color: rgb(var(--drac-green));
}
.runmode-badge.local {
  border: 1px solid rgb(var(--drac-orange) / 0.3);
  background: rgb(var(--drac-orange) / 0.1);
  color: rgb(var(--drac-orange));
}

/* ===== 章节页 ===== */
.breadcrumb {
  font-size: 0.875rem;
  color: rgb(var(--drac-comment));
}
.breadcrumb a:hover {
  color: rgb(var(--drac-fg));
}
.breadcrumb .sep {
  margin: 0 0.5rem;
}
.chapter-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  border-bottom: 1px solid rgb(var(--border-subtle));
  padding-bottom: 1.25rem;
}
.chapter-kicker {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: rgb(var(--accent));
}
.chapter-header h1 {
  margin: 0.25rem 0 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: rgb(var(--drac-fg));
}

/* 本地运行提示 */
.local-notice {
  border-radius: 0.5rem;
  border: 1px solid rgb(var(--drac-orange) / 0.3);
  background: rgb(var(--drac-orange) / 0.05);
  padding: 1.5rem;
}
.local-notice .ln-title {
  font-weight: 600;
  color: rgb(var(--drac-orange));
}
.local-notice p {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  color: rgb(var(--drac-fg));
}
.local-notice code {
  border-radius: 0.25rem;
  background: rgb(var(--bg-elev));
  padding: 0.125rem 0.375rem;
  color: rgb(var(--accent));
  font-family: var(--font-mono);
}
.local-notice .ln-cmd {
  margin-top: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 0.375rem;
  border: 1px solid rgb(var(--border-subtle));
  background: rgb(var(--bg-card));
  padding: 0.75rem;
}
.local-notice .ln-cmd code {
  flex: 1 1 0%;
  background: transparent;
  padding: 0;
  color: rgb(var(--drac-fg));
  font-size: 0.75rem;
}

.copy-btn {
  border-radius: 0.25rem;
  border: 1px solid rgb(var(--border-subtle));
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  color: rgb(var(--drac-fg));
  background: transparent;
  cursor: pointer;
}
.copy-btn:hover {
  background: rgb(var(--bg-elev));
}

/* 本地章只读题卡 */
.local-exercise-card {
  border-radius: 0.5rem;
  border: 1px solid rgb(var(--drac-orange) / 0.2);
  background: rgb(var(--bg-card));
  padding: 1rem;
}
.local-exercise-card .le-name {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: rgb(var(--accent));
}
.local-exercise-card p {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  color: rgb(var(--drac-comment));
}
.local-exercise-card pre {
  margin: 0.75rem 0 0;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--night-line);
  background: var(--night-card);
  overflow: auto;
  max-height: 16rem;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.55;
  color: var(--night-fg);
}

/* ===== 作业卡(browser 章)===== */
.exercise-card {
  margin: 1rem 0;
  border-radius: 0.5rem;
  border: 1px solid rgb(var(--border-subtle));
  background: rgb(var(--bg-card));
  padding: 0.75rem;
}
.exercise-card .ex-head {
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.exercise-card .ex-name {
  border-radius: 0.25rem;
  background: rgb(var(--drac-pink) / 0.15);
  padding: 0.125rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgb(var(--drac-pink));
}
.btn-run {
  margin-left: auto;
  border: 0;
  border-radius: 0.375rem;
  background: rgb(var(--accent));
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: rgb(var(--drac-bg));
  cursor: pointer;
  transition: filter 0.15s ease;
}
.btn-run:hover:not(:disabled) {
  filter: brightness(1.1);
}
.btn-run:disabled {
  opacity: 0.6;
  cursor: default;
}
.btn-reset {
  border-radius: 0.375rem;
  border: 1px solid rgb(var(--border-subtle));
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  color: rgb(var(--drac-fg));
  background: transparent;
  cursor: pointer;
}
.btn-reset:hover:not(:disabled) {
  background: rgb(var(--bg-elev));
}
.btn-reset:disabled {
  opacity: 0.5;
  cursor: default;
}
.ex-editor {
  overflow: hidden;
  border-radius: 0.375rem;
  border: 1px solid rgb(var(--border-subtle));
  background: var(--night-bg); /* monaco 挂载前的底色 */
}
.ex-editor .editor-loading,
.ex-editor textarea.editor-fallback {
  box-sizing: border-box;
  width: 100%;
  display: block;
  padding: 0.85rem 1rem;
  border: 0;
  background: var(--night-bg);
  color: var(--night-fg);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
  resize: vertical;
  outline: none;
}
.ex-editor .editor-loading {
  color: var(--night-comment);
}
.ex-editor textarea.editor-fallback:focus {
  box-shadow: inset 0 0 0 1px var(--night-purple);
}

/* ===== 终端(固定深色)===== */
.terminal {
  overflow: hidden;
  border-radius: 0.5rem;
  background: var(--night-card);
}
.terminal.status-idle {
  border: 1px solid var(--night-line);
}
.terminal.status-loading,
.terminal.status-running {
  border: 1px solid rgb(255 184 108 / 0.4);
}
.terminal.status-passed {
  border: 1px solid rgb(80 250 123 / 0.4);
}
.terminal.status-failed,
.terminal.status-error {
  border: 1px solid rgb(255 85 85 / 0.4);
}
.terminal .term-titlebar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--night-line);
  padding: 0.5rem 1rem;
}
.terminal .dot {
  height: 0.625rem;
  width: 0.625rem;
  border-radius: 9999px;
}
.terminal .dot.red {
  background: rgb(255 85 85 / 0.8);
}
.terminal .dot.orange {
  background: rgb(255 184 108 / 0.8);
}
.terminal .dot.green {
  background: rgb(80 250 123 / 0.8);
}
.terminal .term-label {
  margin-left: 0.5rem;
  font-size: 0.75rem;
  color: var(--night-comment);
}
.terminal .term-pill {
  margin-left: auto;
  border-radius: 9999px;
  padding: 0.125rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
}
.terminal .term-pill.p-idle {
  background: var(--night-elev);
  color: var(--night-comment);
}
.terminal .term-pill.p-loading,
.terminal .term-pill.p-running {
  background: rgb(255 184 108 / 0.15);
  color: var(--night-orange);
}
.terminal .term-pill.p-passed {
  background: rgb(80 250 123 / 0.15);
  color: var(--night-green);
}
.terminal .term-pill.p-failed,
.terminal .term-pill.p-error {
  background: rgb(255 85 85 / 0.15);
  color: var(--night-red);
}
.terminal pre.terminal-output {
  margin: 0;
  max-height: 20rem;
  overflow: auto;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  color: #f8f8f2;
}

/* ===== 记忆闪卡 / 完成开关 / 前后章 ===== */
.flashcards {
  border-radius: 0.5rem;
  border: 1px solid rgb(var(--border-subtle));
  background: rgb(var(--bg-card));
  padding: 1.25rem;
}
.flashcards summary {
  cursor: pointer;
  list-style: none;
  font-size: 1.125rem;
  font-weight: 600;
  color: rgb(var(--drac-fg));
}
.flashcards summary::-webkit-details-marker {
  display: none;
}
.flashcards .fc-hint {
  margin-left: 0.5rem;
  font-size: 0.75rem;
  font-weight: 400;
  color: rgb(var(--drac-comment));
}
.flashcards[open] .fc-hint {
  display: none;
}
.flashcards .fc-body {
  margin-top: 1rem;
}

.complete-card {
  border-radius: 0.75rem;
  border: 1px solid rgb(var(--border-subtle));
  background: rgb(var(--bg-card));
  padding: 1.25rem;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}
.complete-card.done {
  border-color: rgb(var(--drac-green) / 0.4);
  background: rgb(var(--drac-green) / 0.1);
}
.complete-card label {
  display: flex;
  cursor: pointer;
  align-items: flex-start;
  gap: 0.75rem;
}
.complete-card input[type="checkbox"] {
  margin-top: 0.25rem;
  height: 1.25rem;
  width: 1.25rem;
  flex-shrink: 0;
  cursor: pointer;
  border-radius: 0.25rem;
  accent-color: rgb(var(--drac-green));
}
.complete-card .cc-title {
  display: block;
  font-size: 1rem;
  font-weight: 600;
  color: rgb(var(--drac-fg));
}
.complete-card .cc-sub {
  margin-top: 0.25rem;
  display: block;
  font-size: 0.875rem;
  color: rgb(var(--drac-comment));
}
.complete-card .cc-note {
  margin-top: 0.25rem;
  display: block;
  font-size: 0.75rem;
  color: rgb(var(--drac-comment));
}

.prevnext {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
}
.prevnext a {
  flex: 1 1 16rem;
  border-radius: 0.5rem;
  border: 1px solid rgb(var(--border-subtle));
  background: rgb(var(--bg-card));
  padding: 0.75rem 1rem;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}
.prevnext a:hover {
  border-color: rgb(var(--accent) / 0.5);
  background: rgb(var(--bg-elev));
}
.prevnext .pn-label {
  font-size: 0.75rem;
  color: rgb(var(--drac-comment));
}
.prevnext .pn-title {
  margin-top: 0.125rem;
  display: block;
  font-weight: 500;
  color: rgb(var(--drac-fg));
}
.prevnext .pn-next {
  text-align: right;
}

.notice-card {
  border-radius: 0.5rem;
  border: 1px solid rgb(var(--border-subtle));
  background: rgb(var(--bg-card));
  padding: 2rem;
  text-align: center;
  color: rgb(var(--drac-comment));
}
.notice-card a {
  color: rgb(var(--accent));
}

/* ===== Markdown 教程排版(原 @tailwindcss/typography 移植)===== */
.tutorial {
  max-width: none;
  font-size: 1rem;
  line-height: 1.75;
  color: rgb(var(--drac-fg));
}
.tutorial > :first-child {
  margin-top: 0;
}
.tutorial p {
  margin: 1.25em 0;
}
.tutorial h1,
.tutorial h2,
.tutorial h3,
.tutorial h4 {
  font-weight: 600;
  scroll-margin-top: 5rem;
  color: rgb(var(--drac-fg));
}
.tutorial h1 {
  margin: 0 0 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgb(var(--border-subtle));
  font-size: 1.5rem;
  line-height: 1.35;
}
.tutorial h2 {
  margin: 2.5rem 0 0.75rem;
  font-size: 1.25rem;
  line-height: 1.4;
  color: rgb(var(--drac-purple));
}
.tutorial h3 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.125rem;
  line-height: 1.45;
  color: rgb(var(--drac-cyan));
}
.tutorial h4 {
  margin: 1.25rem 0 0.5rem;
  font-size: 1rem;
}
.tutorial a {
  color: rgb(var(--drac-pink));
  font-weight: 500;
  text-decoration: none;
}
.tutorial a:hover {
  text-decoration: underline;
}
.tutorial strong {
  font-weight: 600;
  color: rgb(var(--drac-fg));
}
.tutorial ul {
  margin: 1.25em 0;
  padding-left: 1.625em;
  list-style: disc;
}
.tutorial ol {
  margin: 1.25em 0;
  padding-left: 1.625em;
  list-style: decimal;
}
.tutorial li {
  margin: 0.5em 0;
}
.tutorial li::marker {
  color: rgb(var(--drac-comment));
}
.tutorial blockquote {
  margin: 1.25em 0;
  border-left: 0.25rem solid rgb(var(--drac-pink));
  background: rgb(var(--bg-card));
  padding: 0.25rem 1rem;
  font-style: normal;
  font-weight: 500;
}
.tutorial hr {
  margin: 2.5em 0;
  border: 0;
  border-top: 1px solid rgb(var(--border-subtle));
}
.tutorial :not(pre) > code {
  color: rgb(var(--code-chip-fg));
  background-color: rgb(var(--code-chip-bg));
  border: 1px solid rgb(var(--code-chip-border));
  border-radius: 0.25rem;
  padding: 0.125rem 0.375rem;
  font-size: 0.85em;
  font-weight: 600;
  font-family: var(--font-mono);
}
.tutorial pre {
  margin: 1.25em 0;
  border-radius: 0.5rem;
  border: 1px solid var(--night-line);
  background: var(--night-bg);
  padding: 0.85rem 1rem;
  overflow-x: auto;
  font-size: 0.85em;
  line-height: 1.7;
}
.tutorial pre code {
  font-family: var(--font-mono);
  color: var(--night-fg);
  background: transparent;
  padding: 0;
  border: 0;
  font-weight: 400;
}
/* 作业↔教程对应表等:表体墨色 + 斑马纹,护眼底上扫得清 */
.tutorial table {
  margin: 1.5em 0;
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  text-align: left;
  background: rgb(var(--bg-card));
  border: 1px solid rgb(var(--border-subtle));
}
.tutorial th,
.tutorial td {
  padding: 0.55rem 0.75rem;
  color: rgb(var(--drac-fg));
}
.tutorial thead th {
  background: rgb(var(--bg-elev));
  font-weight: 600;
  border-bottom: 1px solid rgb(var(--border-strong));
}
.tutorial tbody tr:nth-child(even) {
  background: rgb(var(--bg-elev) / 0.55);
}
.tutorial tbody td code,
.tutorial thead th code {
  color: rgb(var(--code-chip-fg));
  background-color: rgb(var(--code-chip-bg));
  border: 1px solid rgb(var(--code-chip-border));
}

/* hljs token 只作用在深色代码块里,避免漏到米色正文/表格 */
.tutorial pre .hljs-comment,
.tutorial pre .hljs-quote {
  color: #7d83a8;
  font-style: italic;
}
.tutorial pre .hljs-keyword,
.tutorial pre .hljs-selector-tag,
.tutorial pre .hljs-built_in,
.tutorial pre .hljs-name {
  color: #ff4fa3;
}
.tutorial pre .hljs-string,
.tutorial pre .hljs-attr,
.tutorial pre .hljs-addition,
.tutorial pre .hljs-regexp {
  color: #f1fa8c;
}
.tutorial pre .hljs-number,
.tutorial pre .hljs-literal,
.tutorial pre .hljs-bullet {
  color: #bd93f9;
}
.tutorial pre .hljs-title,
.tutorial pre .hljs-function .hljs-title,
.tutorial pre .hljs-section,
.tutorial pre .hljs-selector-id {
  color: #50fa7b;
}
.tutorial pre .hljs-type,
.tutorial pre .hljs-class .hljs-title,
.tutorial pre .hljs-params {
  color: #8be9fd;
}
.tutorial pre .hljs-variable,
.tutorial pre .hljs-template-variable {
  color: #ffb86c;
}
.tutorial pre .hljs-meta {
  color: #8be9fd;
}
.tutorial pre .hljs-deletion {
  color: #ff5555;
}
.tutorial pre .hljs-symbol,
.tutorial pre .hljs-link {
  color: #ff4fa3;
}

/* ===== Mermaid 图容器 ===== */
.tutorial .mermaid-block {
  background: rgb(var(--bg-card));
  border: 1px solid rgb(var(--border-subtle));
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  color: rgb(var(--drac-fg));
  width: fit-content;
  max-width: 100%;
  margin: 1.25em auto;
}
.tutorial .mermaid-block svg {
  display: block;
  margin-inline: auto;
  max-width: 100%;
  width: auto;
  height: auto;
}
.tutorial .mermaid-error {
  color: rgb(var(--drac-red));
  font-size: 0.8rem;
  white-space: pre-wrap;
  margin: 0;
}
/* 节点文字单行:prose 的 p margin 会把字挤出 foreignObject,头尾被裁 */
.tutorial .mermaid-block p,
.tutorial .mermaid-block .nodeLabel,
.tutorial .mermaid-block .cluster-label,
.tutorial .mermaid-block .edgeLabel,
.tutorial .mermaid-block .label {
  margin: 0;
  line-height: 1.35;
  white-space: nowrap;
}
.tutorial .mermaid-block foreignObject {
  overflow: visible;
}

/* 页面纵向节奏 */
.page-stack > * + * {
  margin-top: 2rem;
}
.blocks > * + * {
  margin-top: 0.5rem;
}