/* ==========================================================================
   GitWave — 单一手写样式表
   1. 设计令牌（颜色 / 间距 / 圆角 / 阴影）
   2. 基础重置与排版
   3. 布局与页头页脚
   4. 按钮、表单与通用组件
   5. 首页
   6. 认证页面
   7. 个人主页
   8. 仓库（文件浏览、代码、提交）
   9. 议题与拉取请求
   10. 设置页
   11. 搜索、404、错误页
   12. 响应式与无障碍
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计令牌
   -------------------------------------------------------------------------- */

:root {
  /* 颜色 —— 浅色主题（GitHub 风格中性色） */
  --color-canvas: #ffffff;
  --color-canvas-subtle: #f6f8fa;
  --color-canvas-inset: #eff2f5;
  --color-canvas-overlay: #ffffff;
  --color-border: #d0d7de;
  --color-border-muted: #d8dee4;
  --color-border-strong: #b7bfc6;
  --color-text: #1f2328;
  --color-text-muted: #59636e;
  --color-text-subtle: #818b98;
  --color-text-inverse: #ffffff;
  --color-accent: #0969da;
  --color-accent-hover: #0757ba;
  --color-accent-subtle: #ddf4ff;
  --color-accent-muted: #54aeff;
  --color-success: #1a7f37;
  --color-success-subtle: #dafbe1;
  --color-success-border: #4ac26b;
  --color-danger: #cf222e;
  --color-danger-hover: #a40e26;
  --color-danger-subtle: #ffebe9;
  --color-danger-border: #ff8182;
  --color-attention: #9a6700;
  --color-attention-subtle: #fff8c5;
  --color-attention-border: #d4a72c;
  --color-done: #8250df;
  --color-done-subtle: #fbefff;
  --color-neutral-subtle: #eff2f5;
  --color-neutral-muted: #6e7781;
  --color-focus: #0969da;
  --color-shadow: rgba(31, 35, 40, 0.08);
  --color-shadow-strong: rgba(31, 35, 40, 0.16);
  --color-overlay: rgba(31, 35, 40, 0.55);
  --color-code-bg: #f6f8fa;
  --color-selection: rgba(9, 105, 218, 0.15);
  --color-gradient-start: #0969da;
  --color-gradient-end: #8250df;

  /* 间距 */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  /* 圆角 */
  --radius-sm: 4px;
  --radius: 6px;
  --radius-lg: 12px;
  --radius-full: 999px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(31, 35, 40, 0.08);
  --shadow-md: 0 4px 12px rgba(31, 35, 40, 0.1);
  --shadow-lg: 0 12px 32px rgba(31, 35, 40, 0.16);

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono",
    "Courier New", monospace;

  --container-width: 1280px;
  --header-height: 64px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-canvas: #0d1117;
    --color-canvas-subtle: #161b22;
    --color-canvas-inset: #010409;
    --color-canvas-overlay: #161b22;
    --color-border: #30363d;
    --color-border-muted: #21262d;
    --color-border-strong: #484f58;
    --color-text: #e6edf3;
    --color-text-muted: #9198a1;
    --color-text-subtle: #768390;
    --color-text-inverse: #ffffff;
    --color-accent: #4493f8;
    --color-accent-hover: #58a6ff;
    --color-accent-subtle: #121d2f;
    --color-accent-muted: #1f6feb;
    --color-success: #3fb950;
    --color-success-subtle: #0f2916;
    --color-success-border: #238636;
    --color-danger: #f85149;
    --color-danger-hover: #ff7b72;
    --color-danger-subtle: #2a1214;
    --color-danger-border: #da3633;
    --color-attention: #d29922;
    --color-attention-subtle: #272115;
    --color-attention-border: #9e6a03;
    --color-done: #ab7df8;
    --color-done-subtle: #1d1430;
    --color-neutral-subtle: #21262d;
    --color-neutral-muted: #8b949e;
    --color-focus: #4493f8;
    --color-shadow: rgba(1, 4, 9, 0.5);
    --color-shadow-strong: rgba(1, 4, 9, 0.8);
    --color-overlay: rgba(1, 4, 9, 0.7);
    --color-code-bg: #161b22;
    --color-selection: rgba(56, 139, 253, 0.35);
  }
}

:root[data-theme="dark"] {
  --color-canvas: #0d1117;
  --color-canvas-subtle: #161b22;
  --color-canvas-inset: #010409;
  --color-canvas-overlay: #161b22;
  --color-border: #30363d;
  --color-border-muted: #21262d;
  --color-border-strong: #484f58;
  --color-text: #e6edf3;
  --color-text-muted: #9198a1;
  --color-text-subtle: #768390;
  --color-accent: #4493f8;
  --color-accent-hover: #58a6ff;
  --color-accent-subtle: #121d2f;
  --color-accent-muted: #1f6feb;
  --color-success: #3fb950;
  --color-success-subtle: #0f2916;
  --color-success-border: #238636;
  --color-danger: #f85149;
  --color-danger-hover: #ff7b72;
  --color-danger-subtle: #2a1214;
  --color-danger-border: #da3633;
  --color-attention: #d29922;
  --color-attention-subtle: #272115;
  --color-attention-border: #9e6a03;
  --color-done: #ab7df8;
  --color-done-subtle: #1d1430;
  --color-neutral-subtle: #21262d;
  --color-neutral-muted: #8b949e;
  --color-focus: #4493f8;
  --color-shadow: rgba(1, 4, 9, 0.5);
  --color-shadow-strong: rgba(1, 4, 9, 0.8);
  --color-overlay: rgba(1, 4, 9, 0.7);
  --color-code-bg: #161b22;
  --color-selection: rgba(56, 139, 253, 0.35);
}

/* --------------------------------------------------------------------------
   2. 基础重置与排版
   -------------------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--color-selection);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 var(--space-3);
  font-weight: 600;
  line-height: 1.25;
}

h1 {
  font-size: 2rem;
}
h2 {
  font-size: 1.5rem;
}
h3 {
  font-size: 1.15rem;
}

p {
  margin: 0 0 var(--space-3);
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

img,
svg {
  vertical-align: middle;
}

code,
kbd,
pre,
samp {
  font-family: var(--font-mono);
  font-size: 0.86em;
}

hr {
  height: 1px;
  margin: var(--space-5) 0;
  border: 0;
  background: var(--color-border);
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.icon {
  flex: 0 0 auto;
  vertical-align: -0.125em;
}

.sha {
  padding: 2px 5px;
  border-radius: var(--radius-sm);
  background: var(--color-canvas-inset);
  color: var(--color-text-muted);
  font-size: 12px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
  left: 0;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.container.narrow {
  max-width: 900px;
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

/* --------------------------------------------------------------------------
   3. 页头与页脚
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--color-canvas-subtle);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: saturate(180%) blur(8px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand:hover {
  text-decoration: none;
}

.brand__mark {
  display: inline-flex;
  color: var(--color-accent);
}

.brand__text {
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav__link {
  color: var(--color-text);
  font-weight: 500;
  white-space: nowrap;
}

.site-nav__link:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.site-nav__link--wide {
  padding: 3px var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-canvas-subtle);
  color: var(--color-text);
  font-weight: 600;
}

.site-nav__link--wide:hover {
  border-color: var(--color-border-strong);
  background: var(--color-accent-subtle);
  color: var(--color-accent);
}

.site-search {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1 1 320px;
  max-width: 420px;
  margin-left: auto;
}

.site-search .icon {
  position: absolute;
  left: 10px;
  color: var(--color-text-subtle);
  pointer-events: none;
}

.site-search__input {
  width: 100%;
  height: 34px;
  padding: 4px 40px 4px 32px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-canvas);
  color: var(--color-text);
  font-family: inherit;
  font-size: 13px;
}

.site-search__input::placeholder {
  color: var(--color-text-subtle);
}

.site-search__input:focus {
  border-color: var(--color-accent);
  outline: 2px solid var(--color-accent-muted);
  outline-offset: -1px;
}

.site-search__kbd {
  position: absolute;
  right: 8px;
  padding: 0 5px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-canvas-subtle);
  color: var(--color-text-subtle);
  font-size: 11px;
  line-height: 18px;
  pointer-events: none;
}

.site-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

.user-menu {
  position: relative;
}

.user-menu__trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 3px 8px 3px 3px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  list-style: none;
  color: var(--color-text);
  font-weight: 500;
}

.user-menu__trigger::-webkit-details-marker {
  display: none;
}

.user-menu__trigger:hover {
  background: var(--color-canvas-inset);
  border-color: var(--color-border);
}

.user-menu__name {
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-menu__panel {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  z-index: 50;
  min-width: 220px;
  padding: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-canvas-overlay);
  box-shadow: var(--shadow-md);
}

.user-menu__header {
  margin: 0 0 var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
}

.user-menu__login {
  color: var(--color-text-subtle);
  font-size: 12px;
}

.user-menu__item {
  display: block;
  width: 100%;
  padding: 6px var(--space-3);
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--color-text);
  font-family: inherit;
  font-size: 13px;
  text-align: left;
  cursor: pointer;
}

.user-menu__item:hover {
  background: var(--color-canvas-inset);
  text-decoration: none;
}

.user-menu__item--button {
  color: var(--color-danger);
}

.user-menu__form {
  margin: 0;
}

.site-footer {
  margin-top: var(--space-8);
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-canvas-subtle);
  color: var(--color-text-muted);
  font-size: 13px;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.site-footer__copy {
  margin: 0;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.site-footer__links a {
  color: var(--color-text-muted);
}

.site-footer__links a:hover {
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   4. 按钮、表单与通用组件
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 32px;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-canvas-subtle);
  color: var(--color-text);
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
}

.btn:hover {
  background: var(--color-canvas-inset);
  border-color: var(--color-border-strong);
  text-decoration: none;
}

.btn:active {
  transform: translateY(1px);
}

.btn[disabled],
.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.btn--primary {
  background: var(--color-success);
  border-color: var(--color-success-border);
  color: var(--color-text-inverse);
}

.btn--primary:hover {
  background: #1f883d;
  border-color: var(--color-success-border);
}

:root[data-theme="dark"] .btn--primary:hover {
  background: #2ea043;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn--primary:hover {
    background: #2ea043;
  }
}

.btn--danger {
  background: var(--color-danger);
  border-color: var(--color-danger-border);
  color: var(--color-text-inverse);
}

.btn--danger:hover {
  background: var(--color-danger-hover);
}

.btn--outline {
  background: var(--color-canvas);
}

.btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--color-text);
}

.btn--ghost:hover {
  background: var(--color-canvas-inset);
  border-color: transparent;
}

.btn--sm {
  height: 28px;
  padding: 0 10px;
  font-size: 12px;
}

.btn--lg {
  height: 44px;
  padding: 0 var(--space-5);
  font-size: 15px;
  border-radius: var(--radius-lg);
}

.btn--block {
  width: 100%;
  height: 38px;
}

.btn--icon {
  width: 32px;
  padding: 0;
}

.btn__count {
  padding-left: var(--space-2);
  border-left: 1px solid currentColor;
  margin-left: 2px;
  opacity: 0.75;
  font-variant-numeric: tabular-nums;
}

.theme-toggle .icon--moon {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon--sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon--moon {
  display: inline-block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon--sun {
    display: none;
  }
  :root:not([data-theme="light"]) .theme-toggle .icon--moon {
    display: inline-block;
  }
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--color-text-muted);
  font-size: 12.5px;
}

.meta-item--muted {
  color: var(--color-text-subtle);
}

a.meta-item:hover {
  color: var(--color-accent);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-canvas-subtle);
  color: var(--color-text-muted);
  font-size: 12px;
  font-weight: 500;
  line-height: 20px;
  white-space: nowrap;
}

.badge--open {
  background: var(--color-success-subtle);
  border-color: var(--color-success-border);
  color: var(--color-success);
}

.badge--closed {
  background: var(--color-danger-subtle);
  border-color: var(--color-danger-border);
  color: var(--color-danger);
}

.badge--merged {
  background: var(--color-done-subtle);
  border-color: var(--color-done);
  color: var(--color-done);
}

.badge--private {
  background: var(--color-attention-subtle);
  border-color: var(--color-attention-border);
  color: var(--color-attention);
}

.badge--public {
  background: var(--color-canvas-subtle);
  border-color: var(--color-border);
  color: var(--color-text-muted);
}

.badge--neutral {
  background: var(--color-neutral-subtle);
  border-color: var(--color-border);
  color: var(--color-neutral-muted);
}

.badge--label {
  background: var(--color-accent-subtle);
  border-color: transparent;
  color: var(--color-accent);
}

.badge--success {
  background: var(--color-success-subtle);
  border-color: var(--color-success-border);
  color: var(--color-success);
}

.badge--danger {
  background: var(--color-danger-subtle);
  border-color: var(--color-danger-border);
  color: var(--color-danger);
}

.badge--warning {
  background: var(--color-attention-subtle);
  border-color: var(--color-attention-border);
  color: var(--color-attention);
}

.badge--draft {
  background: var(--color-neutral-subtle);
  border-color: var(--color-border);
  color: var(--color-neutral-muted);
}

.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  border-radius: var(--radius-full);
  overflow: hidden;
  user-select: none;
}

.avatar--image {
  object-fit: cover;
  background: var(--color-canvas-inset);
}

.avatar--initials {
  background: linear-gradient(135deg, var(--color-accent), var(--color-done));
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1;
}

.avatar--commit {
  background: var(--color-canvas-inset);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.topic-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: var(--space-3) 0 0;
}

.topic {
  display: inline-block;
  padding: 1px 9px;
  border-radius: var(--radius-full);
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  font-size: 12px;
  font-weight: 500;
}

a.topic:hover {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  text-decoration: none;
}

.topic--static {
  background: var(--color-canvas-inset);
  color: var(--color-text-muted);
}

.alert {
  margin: 0 0 var(--space-4);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-canvas-subtle);
  color: var(--color-text);
  font-size: 13.5px;
}

.alert--danger {
  background: var(--color-danger-subtle);
  border-color: var(--color-danger-border);
  color: var(--color-danger);
}

.alert--info {
  background: var(--color-accent-subtle);
  border-color: var(--color-accent-muted);
  color: var(--color-text);
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-8) var(--space-5);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-canvas-subtle);
  text-align: center;
}

.empty-state__icon {
  color: var(--color-text-subtle);
}

.empty-state__title {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.empty-state__hint {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 13px;
}

.empty-state__action {
  margin-top: var(--space-2);
}

.tabs {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
  display: none;
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-3) 0;
  border-bottom: 2px solid transparent;
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
}

.tab:hover {
  color: var(--color-text);
  text-decoration: none;
}

.tab--active {
  border-bottom-color: var(--color-accent);
  color: var(--color-text);
}

.tab__count {
  padding: 0 7px;
  border-radius: var(--radius-full);
  background: var(--color-canvas-inset);
  color: var(--color-text-muted);
  font-size: 12px;
  font-weight: 600;
  line-height: 20px;
}

.tab__label {
  white-space: nowrap;
}

/* 纯 CSS 标签页（个人主页） */
.tabs--radio {
  position: relative;
  display: block;
}

.tabs__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.tabs__bar {
  display: flex;
  gap: var(--space-5);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs__bar::-webkit-scrollbar {
  display: none;
}

.tabs__bar .tab {
  cursor: pointer;
}

.tabs__panel {
  display: none;
  padding-top: var(--space-4);
}

#tab-repositories:checked ~ #panel-repositories,
#tab-starred:checked ~ #panel-starred,
#tab-activity:checked ~ #panel-activity {
  display: block;
}

#tab-repositories:checked ~ .tabs__bar label[for="tab-repositories"],
#tab-starred:checked ~ .tabs__bar label[for="tab-starred"],
#tab-activity:checked ~ .tabs__bar label[for="tab-activity"] {
  border-bottom-color: var(--color-accent);
  color: var(--color-text);
}

#tab-repositories:focus-visible ~ .tabs__bar label[for="tab-repositories"],
#tab-starred:focus-visible ~ .tabs__bar label[for="tab-starred"],
#tab-activity:focus-visible ~ .tabs__bar label[for="tab-activity"] {
  outline: 2px solid var(--color-focus);
  outline-offset: -2px;
  border-radius: var(--radius-sm);
}

.filter-tabs {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.filter-tabs--full {
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}

.filter-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-2) 0;
  border-bottom: 2px solid transparent;
  color: var(--color-text-muted);
  font-size: 13.5px;
  font-weight: 500;
}

.filter-tab:hover {
  color: var(--color-text);
  text-decoration: none;
}

.filter-tab--active {
  border-bottom-color: var(--color-accent);
  color: var(--color-text);
}

.filter-tab__count {
  color: var(--color-text-subtle);
  font-size: 12px;
}

/* 表单 */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0;
  padding: 0;
  border: 0;
}

.field--fieldset {
  gap: var(--space-2);
}

.field__label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
}

.field__input {
  width: 100%;
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-canvas);
  color: var(--color-text);
  font-family: inherit;
  font-size: 14px;
  line-height: 1.45;
}

.field__input::placeholder {
  color: var(--color-text-subtle);
}

.field__input:focus {
  border-color: var(--color-accent);
  outline: 2px solid var(--color-accent-muted);
  outline-offset: -1px;
}

.field__input--textarea {
  resize: vertical;
  min-height: 90px;
}

.field__hint {
  margin: 0;
  color: var(--color-text-subtle);
  font-size: 12px;
}

.field__prefixed {
  display: flex;
  align-items: stretch;
}

.field__prefix {
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  border: 1px solid var(--color-border);
  border-right: 0;
  border-radius: var(--radius) 0 0 var(--radius);
  background: var(--color-canvas-inset);
  color: var(--color-text-muted);
  font-size: 13px;
  white-space: nowrap;
}

.field__prefixed .field__input {
  border-radius: 0 var(--radius) var(--radius) 0;
}

.radio-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
}

.radio-row:hover {
  border-color: var(--color-border-strong);
  background: var(--color-canvas-subtle);
}

.radio-row input {
  margin-top: 3px;
  accent-color: var(--color-accent);
}

.radio-row__body {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.radio-row__title {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 13.5px;
}

.radio-row__hint {
  color: var(--color-text-muted);
  font-size: 12.5px;
}

/* 折叠式表单（新建议题 / 拉取请求） */
.disclosure {
  position: relative;
}

.disclosure > summary {
  list-style: none;
  user-select: none;
}

.disclosure > summary::-webkit-details-marker {
  display: none;
}

.disclosure__panel {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  z-index: 30;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: min(420px, calc(100vw - 32px));
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-canvas-overlay);
  box-shadow: var(--shadow-md);
}

.page-header {
  margin: var(--space-6) 0 var(--space-5);
}
.page-header__title {
  margin-bottom: var(--space-2);
  font-size: 1.6rem;
}

.page-header__subtitle {
  margin: 0;
  color: var(--color-text-muted);
}

.page-header--search {
  margin-bottom: var(--space-4);
}

/* --------------------------------------------------------------------------
   5. 首页
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: var(--space-8) 0;
  background:
    radial-gradient(1000px 400px at 12% -10%, rgba(9, 105, 218, 0.14), transparent 60%),
    radial-gradient(900px 380px at 92% 0%, rgba(130, 80, 223, 0.14), transparent 60%),
    var(--color-canvas-subtle);
  border-bottom: 1px solid var(--color-border);
}

.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: var(--space-7);
  align-items: center;
}

.hero__copy {
  min-width: 0;
}

.hero__eyebrow {
  display: inline-block;
  margin: 0 0 var(--space-3);
  padding: 3px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-canvas);
  color: var(--color-accent);
  font-size: 12.5px;
  font-weight: 600;
}

.hero__title {
  margin: 0 0 var(--space-4);
  font-size: clamp(2rem, 4.4vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.hero__title-accent {
  background: linear-gradient(120deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__lead {
  max-width: 54ch;
  margin-bottom: var(--space-5);
  color: var(--color-text-muted);
  font-size: 1.02rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  margin: 0;
}

.hero__stat dt {
  color: var(--color-text-subtle);
  font-size: 12.5px;
}

.hero__stat dd {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.hero__panel {
  position: relative;
}

.code-window {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.code-window__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-canvas-subtle);
}

.code-window__dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: var(--color-border-strong);
}

.code-window__title {
  margin-left: var(--space-2);
  color: var(--color-text-subtle);
  font-size: 12px;
}

.code-window__body {
  margin: 0;
  padding: var(--space-4);
  overflow-x: auto;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--color-text);
}

.hero__float {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-canvas-overlay);
  box-shadow: var(--shadow-md);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--color-attention);
}

.hero__float--stars {
  left: -18px;
  bottom: 28px;
}

.section {
  padding: var(--space-7) 0;
}

.section--muted {
  background: var(--color-canvas-subtle);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.section__title {
  margin: 0;
  font-size: 1.35rem;
}

.section__hint {
  color: var(--color-text-subtle);
  font-size: 13px;
}

.section__more {
  font-size: 13.5px;
  font-weight: 500;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-4);
}

.repo-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.repo-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.repo-card__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-2);
}

.repo-card__title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
}

.repo-card__link {
  color: var(--color-accent);
}

.repo-card__owner {
  font-weight: 400;
  opacity: 0.85;
}

.repo-card__slash {
  opacity: 0.5;
  margin: 0 1px;
}

.repo-card__name {
  font-weight: 600;
}

.repo-card__desc {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 13px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.repo-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-top: auto;
  padding-top: var(--space-2);
}

.repo-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.repo-list--bordered {
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-canvas);
}

.repo-list--bordered .repo-row {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-4);
}

.repo-list--bordered .repo-row:last-child {
  border-bottom: 0;
}

.repo-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-2) 0;
}

.repo-row__main {
  min-width: 0;
}

.repo-row__name {
  color: var(--color-accent);
  font-size: 14.5px;
  font-weight: 600;
}

.repo-row__owner {
  font-weight: 400;
  opacity: 0.85;
}

.repo-row__desc {
  margin: 2px 0 0;
  color: var(--color-text-muted);
  font-size: 12.5px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.repo-row__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  color: var(--color-text-subtle);
  font-size: 12.5px;
}

.repo-row__topics {
  display: inline-flex;
  gap: 4px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
}

.feature-card {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
}

.feature-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  margin-bottom: var(--space-3);
  border-radius: var(--radius);
  background: var(--color-accent-subtle);
  font-size: 18px;
}

.feature-card__title {
  margin: 0 0 var(--space-2);
  font-size: 15px;
}

.feature-card__text {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 13px;
}

.cta {
  padding: var(--space-7) 0;
  background: linear-gradient(120deg, var(--color-accent), var(--color-done));
  color: #fff;
}

.cta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.cta__copy {
  min-width: 0;
}

.cta__title {
  margin: 0 0 var(--space-1);
  font-size: 1.6rem;
  color: #fff;
}

.cta__text {
  margin: 0;
  color: rgba(255, 255, 255, 0.88);
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.cta .btn--primary {
  background: #fff;
  border-color: #fff;
  color: var(--color-accent);
}

.cta .btn--primary:hover {
  background: rgba(255, 255, 255, 0.9);
}

.cta .btn--outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.7);
  color: #fff;
}

.cta .btn--outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}

/* --------------------------------------------------------------------------
   6. 认证页面
   -------------------------------------------------------------------------- */

.auth {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-7) var(--space-4);
  min-height: calc(100vh - var(--header-height) - 120px);
  background:
    radial-gradient(800px 320px at 50% 0%, rgba(9, 105, 218, 0.1), transparent 65%),
    var(--color-canvas);
}

.auth__card {
  width: 100%;
  max-width: 420px;
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  box-shadow: var(--shadow-md);
}

.auth__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  color: var(--color-text);
  font-size: 1.15rem;
  font-weight: 700;
}

.auth__brand:hover {
  text-decoration: none;
}

.auth__brand-text {
  letter-spacing: -0.01em;
}

.auth__logo {
  color: var(--color-accent);
  display: inline-flex;
}

.auth__title {
  margin: 0 0 var(--space-2);
  font-size: 1.5rem;
}

.auth__subtitle {
  margin: 0 0 var(--space-5);
  color: var(--color-text-muted);
  font-size: 13.5px;
}

.auth__footer {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 13px;
  text-align: center;
}

/* --------------------------------------------------------------------------
   7. 个人主页
   -------------------------------------------------------------------------- */

.profile {
  padding: var(--space-6) 0 var(--space-7);
}

.profile__header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
  padding-bottom: var(--space-5);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.profile__avatar {
  border: 1px solid var(--color-border);
}

.profile__identity {
  flex: 1 1 auto;
  min-width: 0;
}

.profile__name {
  margin: 0;
  font-size: 1.75rem;
}

.profile__login {
  margin: 2px 0 var(--space-3);
  color: var(--color-text-muted);
  font-size: 1.05rem;
  font-family: var(--font-mono);
}

.profile__bio {
  max-width: 60ch;
  margin: 0 0 var(--space-3);
  color: var(--color-text);
}

.profile__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  color: var(--color-text-muted);
}

.profile__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.activity-feed {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.activity-item {
  display: flex;
  gap: var(--space-3);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.activity-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.activity-item__body {
  min-width: 0;
}

.activity-item__text {
  margin: 0;
  font-size: 13.5px;
}

.activity-item__actor {
  font-weight: 600;
}

.activity-item__verb {
  margin: 0 4px;
  color: var(--color-text-muted);
}

.activity-item__repo {
  font-weight: 500;
}

.activity-item__payload {
  margin: var(--space-1) 0 0;
  padding: var(--space-2) var(--space-3);
  border-left: 3px solid var(--color-border);
  background: var(--color-canvas-subtle);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-text-muted);
  font-size: 12.5px;
}

.activity-item__time {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin: var(--space-1) 0 0;
  color: var(--color-text-subtle);
  font-size: 12px;
}

/* --------------------------------------------------------------------------
   8. 仓库
   -------------------------------------------------------------------------- */

.repo-header {
  padding: var(--space-5) 0 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-canvas-subtle);
}

.repo-header__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.repo-header__identity {
  min-width: 0;
  flex: 1 1 420px;
}

.repo-header__title {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  font-size: 1.5rem;
  font-weight: 500;
}

.repo-header__owner {
  color: var(--color-text-muted);
}

.repo-header__slash {
  color: var(--color-text-subtle);
}

.repo-header__name {
  color: var(--color-accent);
  font-weight: 600;
}

.repo-header__desc {
  max-width: 70ch;
  margin: var(--space-2) 0 0;
  color: var(--color-text-muted);
}

.repo-header__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.repo-header__actions form {
  display: inline-flex;
}

.repo-header__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-3);
}

.tabs--repo {
  margin-top: var(--space-3);
}

.repo-body {
  padding-top: var(--space-4);
  padding-bottom: var(--space-7);
}

.repo-filebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.repo-filebar__left,
.repo-filebar__right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.branch-menu {
  position: relative;
}

.branch-menu__trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-canvas);
  color: var(--color-text);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
}

.branch-menu__trigger::-webkit-details-marker {
  display: none;
}

.branch-menu__trigger:hover {
  background: var(--color-canvas-subtle);
}

.branch-menu__name {
  font-family: var(--font-mono);
}

.branch-menu__panel {
  position: absolute;
  left: 0;
  top: calc(100% + 6px);
  z-index: 30;
  width: 260px;
  max-height: 340px;
  overflow-y: auto;
  padding: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-canvas-overlay);
  box-shadow: var(--shadow-md);
}

.branch-menu__title {
  margin: 0 0 var(--space-2);
  padding: 0 var(--space-2);
  color: var(--color-text-subtle);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.branch-menu__item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 13px;
}

.branch-menu__item:hover {
  background: var(--color-canvas-inset);
  text-decoration: none;
}

.branch-menu__item--active {
  font-weight: 600;
  color: var(--color-accent);
}

.branch-menu__label {
  font-family: var(--font-mono);
  overflow: hidden;
  text-overflow: ellipsis;
}

.branch-menu__tag {
  margin-left: auto;
  padding: 0 6px;
  border-radius: var(--radius-full);
  background: var(--color-canvas-inset);
  color: var(--color-text-subtle);
  font-size: 11px;
}

.branch-menu__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.branch-menu__tag--protected {
  background: var(--color-attention-subtle);
  color: var(--color-attention);
}

.breadcrumbs {
  margin-bottom: var(--space-3);
  overflow-x: auto;
  scrollbar-width: none;
}

.breadcrumbs::-webkit-scrollbar {
  display: none;
}

.breadcrumbs__list {
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  font-size: 13.5px;
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.breadcrumbs__sep {
  color: var(--color-text-subtle);
}

.breadcrumbs__current {
  color: var(--color-text);
  font-weight: 600;
}

.repo-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: var(--space-5);
  align-items: start;
}

.repo-grid__main {
  min-width: 0;
}

.repo-grid__side {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.side-panel {
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
}

.side-panel__title {
  margin: 0 0 var(--space-3);
  font-size: 14px;
  font-weight: 600;
}

.side-panel__text {
  margin: 0 0 var(--space-3);
  color: var(--color-text-muted);
  font-size: 13px;
}

.side-panel__text--muted {
  color: var(--color-text-subtle);
}

.side-panel__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.side-panel__list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-muted);
  font-size: 13px;
}

.side-panel__list a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.latest-commit {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-bottom: 0;
  border-radius: var(--radius) var(--radius) 0 0;
  background: var(--color-canvas-subtle);
  font-size: 13px;
  overflow: hidden;
}

.latest-commit__author {
  font-weight: 600;
  white-space: nowrap;
}

.latest-commit__message {
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.latest-commit__sha {
  margin-left: auto;
}

.latest-commit__time {
  color: var(--color-text-subtle);
  white-space: nowrap;
}

.file-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-canvas);
  overflow-x: auto;
}

.latest-commit + .file-panel {
  border-radius: 0 0 var(--radius) var(--radius);
}

.file-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

.file-table thead th {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-canvas-subtle);
  color: var(--color-text-muted);
  font-size: 12px;
  font-weight: 600;
  text-align: left;
  white-space: nowrap;
}

.file-table__col-name {
  width: 45%;
}

.file-table__col-meta {
  width: 30%;
}

.file-table__col-size {
  width: 25%;
  text-align: right !important;
}

.file-table__col-status {
  width: 20%;
}

.file-table--diff .file-table__col-name {
  width: 55%;
}

.file-table--diff .file-table__col-status {
  width: 20%;
}

.file-table--diff .file-table__col-size {
  width: 25%;
}

.file-table--diff .file-row__name {
  font-family: var(--font-mono);
  font-size: 12.5px;
}

.file-row td {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border-muted);
  vertical-align: middle;
}

.file-row:last-child td {
  border-bottom: 0;
}

.file-row:hover td {
  background: var(--color-canvas-subtle);
}

.file-row__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text);
  font-weight: 500;
}

.file-row__link:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.file-row__name {
  font-family: var(--font-mono);
  font-size: 13px;
}

.file-row--parent .file-row__link {
  color: var(--color-text-muted);
}

.icon--folder {
  color: var(--color-accent);
}

.icon--file {
  color: var(--color-text-subtle);
}

.readme {
  margin-top: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  overflow: hidden;
}

.readme__header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: var(--space-2) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-canvas-subtle);
  color: var(--color-text-muted);
  font-size: 12.5px;
  font-weight: 600;
}

.file-viewer {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  overflow: hidden;
}

.file-viewer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-canvas-subtle);
}

.file-viewer__title {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.file-viewer__size {
  color: var(--color-text-subtle);
  font-size: 12.5px;
}

.file-viewer__lang {
  padding: 0 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-canvas);
  color: var(--color-text-muted);
  font-size: 11.5px;
  font-weight: 600;
  line-height: 18px;
}

.file-viewer__actions {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.file-viewer__sha {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-text-subtle);
}

.code-viewer {
  overflow-x: auto;
}

.code-viewer__pre {
  margin: 0;
  padding: var(--space-3) 0;
  background: var(--color-canvas);
  font-size: 12.5px;
  line-height: 1.55;
  tab-size: 2;
}

.code-viewer__code {
  font-family: var(--font-mono);
  font-variant-ligatures: none;
  white-space: pre;
}

.code-line {
  display: inline;
}

.code-line__number {
  display: inline-block;
  width: 3.2em;
  margin-right: 12px;
  padding-right: 8px;
  border-right: 1px solid var(--color-border-muted);
  color: var(--color-text-subtle);
  text-align: right;
  user-select: none;
}

.code-line__text {
  white-space: pre;
}

.code-block {
  margin: 0;
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-code-bg);
  overflow-x: auto;
  font-size: 12.5px;
  line-height: 1.6;
}

/* Markdown 正文 */
.markdown-body {
  padding: var(--space-5);
  color: var(--color-text);
  font-size: 14px;
  line-height: 1.65;
  overflow-wrap: break-word;
}

.markdown-body > *:first-child {
  margin-top: 0;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  margin: var(--space-5) 0 var(--space-3);
  padding-bottom: 5px;
  border-bottom: 1px solid var(--color-border);
}

.markdown-body h1 {
  font-size: 1.6rem;
}
.markdown-body h2 {
  font-size: 1.35rem;
}
.markdown-body h3 {
  font-size: 1.15rem;
}

.markdown-body p {
  margin: 0 0 var(--space-4);
}

.markdown-body ul,
.markdown-body ol {
  margin: 0 0 var(--space-4);
  padding-left: 1.6em;
}

.markdown-body ul {
  list-style: disc;
}

.markdown-body ol {
  list-style: decimal;
}

.markdown-body li {
  margin-bottom: 4px;
}

.markdown-body blockquote {
  margin: 0 0 var(--space-4);
  padding: var(--space-1) var(--space-4);
  border-left: 4px solid var(--color-border);
  color: var(--color-text-muted);
}

.markdown-body code {
  padding: 2px 5px;
  border-radius: var(--radius-sm);
  background: var(--color-canvas-inset);
  font-size: 12.5px;
}

.markdown-body pre {
  margin: 0 0 var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius);
  background: var(--color-code-bg);
  overflow-x: auto;
}

.markdown-body pre code {
  padding: 0;
  background: none;
  font-size: 12.5px;
  line-height: 1.55;
}

.markdown-body img {
  max-width: 100%;
  border-radius: var(--radius);
}

.markdown-body table {
  width: 100%;
  margin-bottom: var(--space-4);
  border-collapse: collapse;
}

.markdown-body th,
.markdown-body td {
  padding: 6px 12px;
  border: 1px solid var(--color-border);
}

.markdown-body th {
  background: var(--color-canvas-subtle);
}

/* 提交 */
.commit-groups {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.commit-group__title {
  margin: 0 0 var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 600;
}

.commit-list {
  display: flex;
  flex-direction: column;
}

.commit-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-2);
  border-bottom: 1px solid var(--color-border-muted);
}

.commit-item:last-child {
  border-bottom: 0;
}

.commit-item__body {
  flex: 1 1 auto;
  min-width: 0;
}

.commit-item__message {
  display: block;
  color: var(--color-text);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.commit-item__message:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.commit-item__meta {
  display: flex;
  gap: var(--space-3);
  margin: 2px 0 0;
  color: var(--color-text-subtle);
  font-size: 12px;
}

.commit-item__author {
  color: var(--color-text-muted);
  font-weight: 600;
}

.commit-item__date {
  color: var(--color-text-subtle);
}

.commit-item__sha {
  flex-shrink: 0;
}

.commit-detail {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  overflow: hidden;
}

.commit-detail__header {
  padding: var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.commit-detail__title {
  margin: 0 0 var(--space-2);
  font-size: 1.3rem;
}

.commit-detail__body {
  margin: 0 0 var(--space-4);
  color: var(--color-text-muted);
  white-space: pre-wrap;
}

.commit-detail__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  font-size: 13px;
}

.commit-detail__author {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.commit-detail__author span {
  color: var(--color-text-subtle);
  font-size: 12px;
}

.commit-detail__date {
  color: var(--color-text-muted);
  font-size: 12.5px;
}

.commit-detail__sha {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  color: var(--color-text-subtle);
  font-size: 12.5px;
}

.commit-detail__parents {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.diff-summary {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-canvas-subtle);
  font-size: 13px;
}

.diff-summary__count {
  font-weight: 600;
}

.diff-summary__add,
.diff-add {
  color: var(--color-success);
  font-weight: 600;
}

.diff-summary__del,
.diff-del {
  color: var(--color-danger);
  font-weight: 600;
}

.diff-summary__browse {
  margin-left: auto;
}

/* --------------------------------------------------------------------------
   9. 议题与拉取请求
   -------------------------------------------------------------------------- */

.list-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.issue-list {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  overflow: hidden;
}

.issue-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.issue-item:last-child {
  border-bottom: 0;
}

.issue-item:hover {
  background: var(--color-canvas-subtle);
}

.issue-item__icon {
  padding-top: 2px;
}

.icon--open {
  color: var(--color-success);
}

.icon--closed {
  color: var(--color-danger);
}

.icon--merged {
  color: var(--color-done);
}

.issue-item__body {
  flex: 1 1 auto;
  min-width: 0;
}

.issue-item__title {
  color: var(--color-text);
  font-size: 14.5px;
  font-weight: 600;
}

.issue-item__title:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.issue-item__labels {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-left: var(--space-2);
}

.issue-item__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin: var(--space-1) 0 0;
  color: var(--color-text-subtle);
  font-size: 12.5px;
}

.issue-item__branches {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0 6px;
  border-radius: var(--radius-full);
  background: var(--color-canvas-inset);
  font-family: var(--font-mono);
  font-size: 11.5px;
}

.issue-item__aside {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  padding-top: 2px;
}

.thread {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  overflow: hidden;
}

.thread__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-canvas-subtle);
}

.thread__title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}

.thread__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.thread__heading {
  margin: 0;
  font-size: 1.25rem;
  overflow-wrap: anywhere;
}

.thread__number {
  color: var(--color-text-subtle);
  font-size: 13px;
}

.thread__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 13px;
}

.comment {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.comment--body {
  display: block;
  padding: 0;
  border-bottom: 1px solid var(--color-border);
}

.comment--body .markdown-body {
  padding: var(--space-4) var(--space-5);
}

.comment__body {
  flex: 1 1 auto;
  min-width: 0;
}

.comment__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  font-size: 13px;
}

.comment__time {
  color: var(--color-text-subtle);
  font-size: 12px;
}

.thread__comments {
  display: flex;
  flex-direction: column;
}

.thread__no-comments {
  margin: 0;
  padding: var(--space-5);
  color: var(--color-text-subtle);
  text-align: center;
  font-size: 13px;
}

.comment-form {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-canvas-subtle);
}

.comment-form__body {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.comment-form__actions {
  display: flex;
  justify-content: flex-end;
}

.compare-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-canvas-subtle);
}

.compare-head__branch {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.compare-head__label {
  color: var(--color-text-subtle);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.compare-head__value {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
}

.compare-head__arrow {
  color: var(--color-text-subtle);
  font-size: 18px;
}

.compare-head__meta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  color: var(--color-text-muted);
  font-size: 12.5px;
}

.pull-diff {
  border-top: 1px solid var(--color-border);
}

.pull-diff__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-canvas-subtle);
  font-size: 13px;
  font-weight: 600;
}

.pull-diff .file-panel {
  border: 0;
  border-radius: 0;
}

/* --------------------------------------------------------------------------
   10. 设置页
   -------------------------------------------------------------------------- */

.settings {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.settings__header {
  margin-bottom: var(--space-2);
}

.settings__title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-2);
  font-size: 1.5rem;
}

.settings__subtitle {
  margin: 0;
  color: var(--color-text-muted);
}

.settings-panel {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
}

.settings-panel--danger {
  border-color: var(--color-danger-border);
}

.settings-panel__title {
  margin: 0 0 var(--space-2);
  font-size: 1.05rem;
}

.settings-panel__hint {
  margin: 0 0 var(--space-4);
  color: var(--color-text-muted);
  font-size: 13px;
}

.settings-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.settings-form__actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.settings-list {
  display: flex;
  flex-direction: column;
  margin: 0;
}

.settings-list__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border-muted);
}

.settings-list__row:last-child {
  border-bottom: 0;
}

.settings-list__row dt {
  color: var(--color-text-muted);
  font-size: 13px;
}

.settings-list__row dd {
  margin: 0;
  font-size: 13px;
}

.danger-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border-muted);
}

.danger-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.danger-row__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-width: 60ch;
}

.danger-row__text strong {
  font-size: 14px;
}

.danger-row__text span {
  color: var(--color-text-muted);
  font-size: 12.5px;
}

.danger-row--delete .danger-row__text strong {
  color: var(--color-danger);
}

/* --------------------------------------------------------------------------
   11. 搜索、404 与错误页
   -------------------------------------------------------------------------- */

.search-form {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  max-width: 560px;
  margin: var(--space-4) 0;
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-canvas);
}

.search-form .icon {
  color: var(--color-text-subtle);
}

.search-form__input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: none;
  color: var(--color-text);
  font-family: inherit;
  font-size: 15px;
}

.search-form__input:focus {
  outline: none;
}

.user-list {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  overflow: hidden;
}

.user-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.user-item:last-child {
  border-bottom: 0;
}

.user-item:hover {
  background: var(--color-canvas-subtle);
}

.user-item__name {
  display: block;
  color: var(--color-text);
  font-weight: 600;
}

.user-item__name:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.user-item__login {
  color: var(--color-text-subtle);
  font-size: 12.5px;
  font-family: var(--font-mono);
}

.user-item__bio {
  margin: var(--space-1) 0 0;
  color: var(--color-text-muted);
  font-size: 13px;
}

.search-footer {
  margin-top: var(--space-5);
  color: var(--color-text-subtle);
  font-size: 12.5px;
  text-align: center;
}

.status-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 58vh;
  padding: var(--space-7) var(--space-4);
  text-align: center;
}

.status-page__code {
  margin: 0;
  background: linear-gradient(120deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: 4rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
}

.status-page__title {
  margin: var(--space-2) 0 0;
  font-size: 1.6rem;
}

.status-page__text {
  max-width: 48ch;
  color: var(--color-text-muted);
}

.status-page__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

/* --------------------------------------------------------------------------
   12. 响应式与无障碍
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .repo-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .repo-grid__side {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .repo-grid__side .side-panel {
    flex: 1 1 240px;
  }
}

@media (max-width: 960px) {
  .hero__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-6);
  }

  .hero__panel {
    order: -1;
  }

  .hero__float--stars {
    left: 8px;
  }

  .site-search {
    max-width: none;
  }

  .site-search__kbd {
    display: none;
  }
}

@media (max-width: 820px) {
  .site-nav {
    display: none;
  }

  .profile__header {
    flex-direction: column;
    gap: var(--space-3);
  }

  .comment-form {
    flex-direction: column;
  }

  .issue-item {
    flex-wrap: wrap;
  }

  .issue-item__aside {
    width: 100%;
    justify-content: flex-end;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 var(--space-4);
  }

  .site-header__inner {
    flex-wrap: wrap;
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
    gap: var(--space-2);
  }

  .site-search {
    order: 3;
    flex-basis: 100%;
    max-width: none;
  }

  .site-actions {
    margin-left: auto;
  }

  .site-actions__cta {
    display: none;
  }

  .user-menu__name {
    display: none;
  }

  .hero {
    padding: var(--space-6) 0;
  }

  .hero__stats {
    gap: var(--space-4);
  }

  .hero__stat dd {
    font-size: 1.2rem;
  }

  .section {
    padding: var(--space-5) 0;
  }

  .repo-row {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .repo-row__desc {
    white-space: normal;
  }

  .thread__header,
  .thread__meta,
  .comment,
  .comment-form,
  .compare-head,
  .markdown-body,
  .pull-diff__header,
  .diff-summary {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .file-table {
    min-width: 520px;
  }

  .file-panel {
    overflow-x: auto;
  }

  .card-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 400px) {
  .brand__text {
    display: none;
  }

  .btn {
    padding: 0 var(--space-2);
  }

  .hero__actions .btn,
  .cta__actions .btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  .site-header,
  .site-footer,
  .site-search,
  .site-actions,
  .repo-header__actions {
    display: none !important;
  }

  body {
    background: #fff;
  }
}