/* ============================================================
   GitHub Official Style — Complete Faithful Recreation
   ============================================================ */

/* CSS Variables — GitHub Primer Design System */
:root {
  /* Canvas */
  --color-canvas-default: #ffffff;
  --color-canvas-overlay: #ffffff;
  --color-canvas-inset: #f6f8fa;
  --color-canvas-subtle: #f6f8fa;

  /* Foreground */
  --color-fg-default: #1f2328;
  --color-fg-muted: #636c76;
  --color-fg-subtle: #6e7781;
  --color-fg-on-emphasis: #ffffff;

  /* Border */
  --color-border-default: #d0d7de;
  --color-border-muted: #d8dee4;
  --color-border-subtle: rgba(31, 35, 40, 0.15);

  /* Neutral */
  --color-neutral-emphasis-plus: #24292f;
  --color-neutral-emphasis: #6e7781;
  --color-neutral-muted: rgba(175, 184, 193, 0.2);
  --color-neutral-subtle: rgba(234, 238, 242, 0.5);

  /* Accent / Blue */
  --color-accent-fg: #0969da;
  --color-accent-emphasis: #0969da;
  --color-accent-muted: rgba(84, 174, 255, 0.4);
  --color-accent-subtle: #ddf4ff;

  /* Success / Green */
  --color-success-fg: #1a7f37;
  --color-success-emphasis: #1f883d;
  --color-success-muted: rgba(74, 194, 107, 0.4);
  --color-success-subtle: #dafbe1;

  /* Attention / Yellow */
  --color-attention-fg: #9a6700;
  --color-attention-emphasis: #9a6700;
  --color-attention-muted: rgba(212, 167, 44, 0.4);
  --color-attention-subtle: #fff8c5;

  /* Danger / Red */
  --color-danger-fg: #d1242f;
  --color-danger-emphasis: #cf222e;
  --color-danger-muted: rgba(255, 129, 130, 0.4);
  --color-danger-subtle: #ffebe9;

  /* Done / Purple */
  --color-done-fg: #8250df;
  --color-done-emphasis: #8250df;
  --color-done-subtle: #fbefff;

  /* Header */
  --color-header-bg: #24292f;
  --color-header-divider: #57606a;
  --color-header-logo: #f0f6fc;

  /* Button */
  --color-btn-text: #24292f;
  --color-btn-bg: #f6f8fa;
  --color-btn-border: rgba(31, 35, 40, 0.15);
  --color-btn-shadow: 0 1px 0 rgba(31, 35, 40, 0.04);
  --color-btn-hover-bg: #f3f4f6;
  --color-btn-hover-border: rgba(31, 35, 40, 0.15);
  --color-btn-active-bg: #ebecf0;
  --color-btn-primary-text: #ffffff;
  --color-btn-primary-bg: #1f883d;
  --color-btn-primary-border: rgba(31, 35, 40, 0.15);
  --color-btn-primary-hover-bg: #1a7f37;
  --color-btn-primary-shadow: 0 1px 0 rgba(31, 35, 40, 0.1);
  --color-btn-primary-selected-bg: #187733;
  --color-btn-primary-disabled-text: rgba(255, 255, 255, 0.8);
  --color-btn-primary-disabled-bg: #95d8a6;

  /* Inputs */
  --color-input-bg: #ffffff;
  --color-input-contrast-bg: rgba(175, 184, 193, 0.2);
  --color-input-border: #d0d7de;
  --color-input-shadow: inset 0 1px 0 rgba(208, 215, 222, 0.2);

  /* Scale */
  --base-size-4: 4px;
  --base-size-8: 8px;
  --base-size-12: 12px;
  --base-size-16: 16px;
  --base-size-20: 20px;
  --base-size-24: 24px;
  --base-size-32: 32px;
  --base-size-40: 40px;
  --base-size-48: 48px;

  /* Typography */
  --fontStack-system: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --fontStack-monospace: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
  --text-body-size-small: 12px;
  --text-body-size-medium: 14px;
  --text-body-lineHeight-small: 1.6667;
  --text-body-lineHeight-medium: 1.4286;
  --borderRadius-medium: 6px;
  --borderRadius-large: 12px;
  --borderWidth-thin: 1px;
  --shadow-resting-medium: 0 1px 3px rgba(31, 35, 40, 0.12), 0 8px 24px rgba(66, 74, 83, 0.12);
  --shadow-floating-small: 0 1px 3px rgba(31, 35, 40, 0.12), 0 8px 24px rgba(66, 74, 83, 0.12);
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--fontStack-system);
  font-size: var(--text-body-size-medium);
  line-height: var(--text-body-lineHeight-medium);
  color: var(--color-fg-default);
  background-color: var(--color-canvas-default);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  word-wrap: break-word;
}

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

a:hover {
  text-decoration: underline;
}

/* ============================================================
   GitHub Header
   ============================================================ */
.github-header,
header.AppHeader,
header {
  background-color: var(--color-header-bg);
  padding: 0;
  height: 62px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.github-header-inner {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 0 16px;
  gap: 16px;
}

/* Logo */
.github-header .AppHeader-logo,
.github-header .logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  margin-right: 8px;
  text-decoration: none;
}

.github-header .logo svg,
.github-header .AppHeader-logo svg {
  fill: var(--color-header-logo);
  width: 32px;
  height: 32px;
}

/* Header Nav Links */
.github-header nav,
.AppHeader-nav {
  display: flex;
  align-items: center;
  gap: 0;
  flex: 0 0 auto;
}

.github-header nav a,
.AppHeader-nav a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 8px;
  border-radius: var(--borderRadius-medium);
  transition: color 0.1s ease;
  white-space: nowrap;
}

.github-header nav a:hover,
.AppHeader-nav a:hover {
  color: #ffffff;
  text-decoration: none;
  background-color: rgba(255, 255, 255, 0.1);
}

/* Header Search */
.github-header .header-search,
.AppHeader-search {
  flex: 1;
  max-width: 272px;
  position: relative;
}

.github-header .header-search input,
.AppHeader-search input {
  width: 100%;
  padding: 5px 12px;
  background-color: rgba(255, 255, 255, 0.125);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--borderRadius-medium);
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  font-family: var(--fontStack-system);
  outline: none;
  height: 32px;
  transition: width 0.2s ease, background-color 0.2s ease;
  cursor: text;
}

.github-header .header-search input::placeholder,
.AppHeader-search input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.github-header .header-search input:focus,
.AppHeader-search input:focus {
  background-color: var(--color-canvas-default);
  color: var(--color-fg-default);
  border-color: var(--color-accent-emphasis);
  box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.3);
  width: 360px;
}

/* Header User Menu */
.github-header .user-menu,
.AppHeader-user {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  flex-shrink: 0;
}

.github-header .user-menu a,
.AppHeader-user a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 14px;
  padding: 8px;
  border-radius: var(--borderRadius-medium);
  display: flex;
  align-items: center;
  gap: 4px;
}

.github-header .user-menu a:hover,
.AppHeader-user a:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.1);
  text-decoration: none;
}

.github-header .avatar,
.AppHeader-user .avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: white;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.2);
  background: linear-gradient(135deg, #6e40c9, #3d8bb1);
  flex-shrink: 0;
}

/* Notification badge */
.notification-badge,
.Counter {
  background: #1f6feb;
  color: white;
  border-radius: 2em;
  padding: 0 6px;
  font-size: 11px;
  font-weight: 600;
  min-width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* ============================================================
   Layout & Container
   ============================================================ */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
}

.layout {
  display: grid;
  grid-template-columns: 296px 1fr;
  gap: 24px;
  padding: 24px 0;
}

@media (max-width: 1012px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   Buttons
   ============================================================ */
.btn,
button.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 5px 16px;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--fontStack-system);
  line-height: 20px;
  color: var(--color-btn-text);
  background-color: var(--color-btn-bg);
  border: 1px solid var(--color-btn-border);
  border-radius: var(--borderRadius-medium);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  appearance: none;
  box-shadow: var(--color-btn-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  transition: background-color 80ms cubic-bezier(0.33, 1, 0.68, 1), box-shadow 80ms;
}

.btn:hover {
  background-color: var(--color-btn-hover-bg);
  border-color: rgba(31, 35, 40, 0.15);
  text-decoration: none;
}

.btn:active {
  background-color: var(--color-btn-active-bg);
}

.btn-primary {
  color: var(--color-btn-primary-text);
  background-color: var(--color-btn-primary-bg);
  border-color: rgba(31, 35, 40, 0.15);
  box-shadow: var(--color-btn-primary-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.btn-primary:hover {
  background-color: var(--color-btn-primary-hover-bg);
  border-color: rgba(31, 35, 40, 0.15);
  text-decoration: none;
  color: white;
}

.btn-primary:disabled,
.btn-primary[disabled] {
  color: var(--color-btn-primary-disabled-text);
  background-color: var(--color-btn-primary-disabled-bg);
  pointer-events: none;
}

.btn-sm {
  padding: 3px 12px;
  font-size: 12px;
  line-height: 20px;
}

.btn-large {
  padding: 9px 20px;
  font-size: 16px;
}

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

.btn-danger:hover {
  color: var(--color-fg-on-emphasis);
  background-color: var(--color-danger-emphasis);
  border-color: var(--color-danger-emphasis);
}

/* ============================================================
   Forms & Inputs
   ============================================================ */
.form-group {
  margin-bottom: 16px;
}

.form-group label,
label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 8px;
  color: var(--color-fg-default);
  cursor: default;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="number"],
input[type="url"],
textarea,
select,
.form-control {
  width: 100%;
  padding: 5px 12px;
  font-size: 14px;
  font-family: var(--fontStack-system);
  line-height: 20px;
  color: var(--color-fg-default);
  background-color: var(--color-input-bg);
  border: 1px solid var(--color-input-border);
  border-radius: var(--borderRadius-medium);
  box-shadow: var(--color-input-shadow);
  outline: none;
  transition: border-color 80ms cubic-bezier(0.33, 1, 0.68, 1), box-shadow 80ms cubic-bezier(0.33, 1, 0.68, 1);
  appearance: none;
  min-height: 32px;
}

input:focus,
textarea:focus,
select:focus,
.form-control:focus {
  border-color: var(--color-accent-emphasis);
  outline: 0;
  box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.3);
}

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--color-accent-emphasis);
}

.input-note {
  font-size: 12px;
  color: var(--color-fg-muted);
  margin-top: 4px;
}

/* ============================================================
   Flash / Alert messages
   ============================================================ */
.flash, .error, .alert {
  padding: 16px;
  border-radius: var(--borderRadius-medium);
  margin-bottom: 16px;
  font-size: 14px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.flash-error, .error {
  background-color: var(--color-danger-subtle);
  border: 1px solid rgba(255, 129, 130, 0.4);
  color: var(--color-danger-fg);
}

.flash-success {
  background-color: var(--color-success-subtle);
  border: 1px solid rgba(74, 194, 107, 0.4);
  color: var(--color-success-fg);
}

.flash-warn {
  background-color: var(--color-attention-subtle);
  border: 1px solid var(--color-attention-muted);
  color: var(--color-attention-fg);
}

/* ============================================================
   Landing Page / Index
   ============================================================ */
.hero {
  text-align: center;
  padding: 80px 32px;
  background: #0d1117;
  color: #f0f6fc;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(56, 139, 253, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 64px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 24px;
  color: #f0f6fc;
}

.hero h1 em {
  font-style: normal;
  color: #388bfd;
}

.hero p {
  font-size: 18px;
  line-height: 1.6;
  color: #8b949e;
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-sign-in {
  background: transparent;
  border: 1px solid rgba(240, 246, 252, 0.1);
  color: #f0f6fc;
  padding: 9px 20px;
  border-radius: var(--borderRadius-medium);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 80ms, background-color 80ms;
  display: inline-flex;
  align-items: center;
}

.hero-sign-in:hover {
  border-color: rgba(240, 246, 252, 0.3);
  background: rgba(240, 246, 252, 0.05);
  text-decoration: none;
  color: #f0f6fc;
}

/* Feature sections on landing */
.features-section {
  padding: 80px 32px;
  background: var(--color-canvas-default);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  padding: 24px;
  border: 1px solid var(--color-border-default);
  border-radius: var(--borderRadius-large);
  background: var(--color-canvas-subtle);
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-fg-default);
}

.feature-card p {
  font-size: 14px;
  color: var(--color-fg-muted);
  line-height: 1.6;
}

/* ============================================================
   Sign In / Register Box
   ============================================================ */
.auth-page {
  min-height: calc(100vh - 62px);
  background: var(--color-canvas-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 16px;
}

.auth-logo {
  margin-bottom: 24px;
  display: flex;
  justify-content: center;
}

.auth-logo svg {
  fill: var(--color-fg-default);
  width: 48px;
  height: 48px;
}

.auth-box {
  width: 100%;
  max-width: 340px;
  background: var(--color-canvas-default);
  border: 1px solid var(--color-border-muted);
  border-radius: var(--borderRadius-medium);
  padding: 24px;
}

.auth-box h1 {
  font-size: 20px;
  font-weight: 300;
  text-align: center;
  margin-bottom: 16px;
  color: var(--color-fg-default);
  letter-spacing: 0.3px;
}

.auth-footer {
  width: 100%;
  max-width: 340px;
  border: 1px solid var(--color-border-muted);
  border-radius: var(--borderRadius-medium);
  padding: 16px 24px;
  text-align: center;
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-fg-default);
}

.auth-footer a {
  color: var(--color-accent-fg);
  font-weight: 600;
}

/* ============================================================
   Dashboard
   ============================================================ */
.dashboard-page {
  background: var(--color-canvas-default);
  min-height: calc(100vh - 62px);
}

.dashboard-content {
  padding: 24px 0;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border-muted);
}

.dashboard-header h1,
.dashboard-header h2 {
  font-size: 16px;
  font-weight: 600;
}

/* ============================================================
   Sidebar / Sidenav
   ============================================================ */
.sidenav {
  position: sticky;
  top: 80px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}

.sidenav-item {
  padding: 8px 16px;
  color: var(--color-fg-default);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--borderRadius-medium);
  font-size: 14px;
  font-weight: 400;
  margin-bottom: 2px;
  transition: background-color 0.1s;
}

.sidenav-item:hover {
  background-color: var(--color-neutral-muted);
  text-decoration: none;
}

.sidenav-item.active {
  background-color: var(--color-neutral-muted);
  font-weight: 600;
}

.sidenav-item svg {
  fill: var(--color-fg-muted);
  flex-shrink: 0;
}

/* ============================================================
   Repository Cards
   ============================================================ */
.repo-card {
  background: var(--color-canvas-default);
  border: 1px solid var(--color-border-default);
  border-radius: var(--borderRadius-medium);
  padding: 16px;
  margin-bottom: 8px;
  transition: border-color 80ms;
}

.repo-card:hover {
  border-color: #0969da;
}

.repo-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 8px;
}

.repo-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent-fg);
  text-decoration: none;
}

.repo-name:hover {
  text-decoration: underline;
}

.repo-visibility {
  display: inline-block;
  padding: 0 7px;
  font-size: 12px;
  font-weight: 500;
  line-height: 18px;
  border: 1px solid var(--color-border-default);
  border-radius: 2em;
  color: var(--color-fg-muted);
  flex-shrink: 0;
}

.repo-description {
  font-size: 12px;
  color: var(--color-fg-muted);
  margin-bottom: 16px;
  line-height: 1.5;
}

.repo-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--color-fg-muted);
  flex-wrap: wrap;
}

.repo-language {
  display: flex;
  align-items: center;
  gap: 4px;
}

.language-color {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #3572A5;
  display: inline-block;
}

/* ============================================================
   Profile Page
   ============================================================ */
.profile-page {
  background: var(--color-canvas-default);
  min-height: calc(100vh - 62px);
}

.profile-sidebar {
  /* sticky position handled by layout */
}

.profile-avatar {
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6e40c9, #3d8bb1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 100px;
  font-weight: 600;
  color: white;
  margin-bottom: 16px;
  overflow: hidden;
  border: 1px solid var(--color-border-default);
}

@media (max-width: 1012px) {
  .profile-avatar {
    width: 80px;
    height: 80px;
    font-size: 32px;
  }
}

.profile-name {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-fg-default);
  margin-bottom: 4px;
}

.profile-username {
  font-size: 20px;
  font-weight: 300;
  color: var(--color-fg-muted);
  margin-bottom: 16px;
}

.profile-bio {
  font-size: 14px;
  color: var(--color-fg-default);
  margin-bottom: 16px;
  line-height: 1.5;
}

.profile-stats {
  display: flex;
  gap: 16px;
  font-size: 14px;
  color: var(--color-fg-muted);
  margin-bottom: 16px;
}

.profile-stats a {
  color: var(--color-fg-default);
  font-weight: 600;
  text-decoration: none;
}

.profile-stats a:hover {
  color: var(--color-accent-fg);
}

/* ============================================================
   Tabs / Underline nav
   ============================================================ */
.UnderlineNav {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--color-border-muted);
  margin-bottom: 24px;
  gap: 0;
  overflow-x: auto;
}

.UnderlineNav-item {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 400;
  color: var(--color-fg-default);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  transition: color 0.1s, border-color 0.1s;
}

.UnderlineNav-item:hover {
  border-bottom-color: var(--color-border-default);
  color: var(--color-fg-default);
  text-decoration: none;
}

.UnderlineNav-item.selected,
.UnderlineNav-item.active {
  border-bottom-color: #f78166;
  font-weight: 600;
  color: var(--color-fg-default);
}

.UnderlineNav-item .Counter {
  background: var(--color-neutral-muted);
  color: var(--color-fg-default);
  font-size: 12px;
  padding: 0 6px;
  border-radius: 2em;
  font-weight: 600;
}

/* ============================================================
   Labels / Badges
   ============================================================ */
.Label {
  display: inline-block;
  padding: 0 7px;
  font-size: 12px;
  font-weight: 500;
  line-height: 18px;
  border: 1px solid;
  border-radius: 2em;
  white-space: nowrap;
  cursor: default;
}

.Label--default {
  color: var(--color-fg-default);
  border-color: var(--color-border-default);
}

.Label--primary {
  color: var(--color-fg-on-emphasis);
  background-color: var(--color-neutral-emphasis-plus);
  border-color: transparent;
}

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

.Label--success {
  color: var(--color-success-fg);
  background-color: var(--color-success-subtle);
  border-color: var(--color-success-muted);
}

.Label--warning {
  color: var(--color-attention-fg);
  background-color: var(--color-attention-subtle);
  border-color: var(--color-attention-muted);
}

.Label--danger {
  color: var(--color-danger-fg);
  background-color: var(--color-danger-subtle);
  border-color: var(--color-danger-muted);
}

/* ============================================================
   Code / Monospace
   ============================================================ */
code, kbd, samp {
  font-family: var(--fontStack-monospace);
  font-size: 85%;
}

.blob-wrapper {
  border: 1px solid var(--color-border-default);
  border-radius: var(--borderRadius-medium);
  overflow: hidden;
  margin-bottom: 16px;
}

.blob-header {
  padding: 8px 16px;
  background: var(--color-canvas-subtle);
  border-bottom: 1px solid var(--color-border-default);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--color-fg-muted);
}

.blob-code-inner {
  font-family: var(--fontStack-monospace);
  font-size: 12px;
  line-height: 20px;
  padding: 16px;
  overflow-x: auto;
  white-space: pre;
  color: var(--color-fg-default);
  background: var(--color-canvas-default);
}

.blob-num {
  padding: 0 10px;
  color: var(--color-fg-subtle);
  text-align: right;
  user-select: none;
  border-right: 1px solid var(--color-border-default);
  min-width: 40px;
  font-family: var(--fontStack-monospace);
  font-size: 12px;
}

/* ============================================================
   Issues
   ============================================================ */
.issue-list {
  border: 1px solid var(--color-border-default);
  border-radius: var(--borderRadius-medium);
  overflow: hidden;
}

.issue-item {
  padding: 16px;
  border-bottom: 1px solid var(--color-border-muted);
  display: flex;
  align-items: flex-start;
  gap: 8px;
  background: var(--color-canvas-default);
}

.issue-item:last-child {
  border-bottom: none;
}

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

.issue-state-icon {
  flex-shrink: 0;
  margin-top: 2px;
}

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

.issue-closed {
  color: var(--color-done-fg);
}

.issue-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-fg-default);
  text-decoration: none;
  line-height: 1.4;
}

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

.issue-meta {
  font-size: 12px;
  color: var(--color-fg-muted);
  margin-top: 4px;
}

/* ============================================================
   Notifications / Messages
   ============================================================ */
.notification-list {
  border: 1px solid var(--color-border-default);
  border-radius: var(--borderRadius-medium);
  overflow: hidden;
}

.notification-item {
  display: block;
  padding: 16px;
  border-bottom: 1px solid var(--color-border-muted);
  text-decoration: none;
  color: inherit;
  background: var(--color-canvas-default);
  transition: background-color 80ms;
}

.notification-item:last-child {
  border-bottom: none;
}

.notification-item:hover {
  background: var(--color-canvas-subtle);
  text-decoration: none;
}

.notification-item.unread {
  background-color: #ddf4ff;
  border-left: 3px solid var(--color-accent-emphasis);
}

.notification-item.unread:hover {
  background-color: #caedfb;
}

/* ============================================================
   ARG Components
   ============================================================ */
.arg-hint {
  background: var(--color-attention-subtle);
  border: 1px solid var(--color-attention-muted);
  border-radius: var(--borderRadius-medium);
  padding: 16px;
  margin: 16px 0;
  font-size: 14px;
  color: var(--color-fg-default);
}

.arg-hint strong {
  color: var(--color-attention-fg);
}

/* Progress tracker */
.progress-tracker {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin: 24px 0;
  padding: 24px;
  background: var(--color-canvas-subtle);
  border: 1px solid var(--color-border-default);
  border-radius: var(--borderRadius-medium);
  flex-wrap: wrap;
  gap: 8px;
}

.progress-step {
  text-align: center;
  flex: 1;
  position: relative;
  min-width: 80px;
}

.progress-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 20px;
  left: 60%;
  width: 80%;
  height: 2px;
  background: var(--color-border-default);
}

.progress-step.completed::after {
  background: var(--color-success-emphasis);
}

.step-indicator,
.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-canvas-default);
  border: 2px solid var(--color-border-default);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 8px;
  font-weight: 600;
  font-size: 14px;
  color: var(--color-fg-muted);
  transition: background-color 0.2s, border-color 0.2s;
}

.step-indicator.completed,
.step-number.completed {
  background: var(--color-success-emphasis);
  border-color: var(--color-success-emphasis);
  color: white;
}

.step-indicator.current,
.step-number.current {
  background: var(--color-accent-emphasis);
  border-color: var(--color-accent-emphasis);
  color: white;
}

.progress-step label,
.progress-step small {
  font-size: 12px;
  color: var(--color-fg-muted);
  display: block;
}

.progress-step strong {
  font-size: 13px;
  color: var(--color-fg-default);
  display: block;
  margin-bottom: 2px;
}

/* ============================================================
   Explore / Search page
   ============================================================ */
.search-result {
  border: 1px solid var(--color-border-default);
  border-radius: var(--borderRadius-medium);
  padding: 16px;
  margin-bottom: 16px;
  background: var(--color-canvas-default);
}

.search-result:hover {
  border-color: var(--color-accent-emphasis);
}

.search-result h3 {
  font-size: 20px;
  font-weight: 400;
  margin-bottom: 4px;
}

.search-result h3 a {
  color: var(--color-accent-fg);
}

.search-result h3 a:hover {
  text-decoration: underline;
}

.search-result p {
  font-size: 14px;
  color: var(--color-fg-muted);
  margin: 8px 0;
}

/* ============================================================
   Toasts / Banners
   ============================================================ */
.flash-banner {
  padding: 12px 32px;
  font-size: 14px;
  text-align: center;
}

.flash-banner.success {
  background: var(--color-success-subtle);
  color: var(--color-success-fg);
  border-bottom: 1px solid var(--color-success-muted);
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  border-top: 1px solid var(--color-border-muted);
  padding: 40px 32px;
  background: var(--color-canvas-default);
  color: var(--color-fg-muted);
  font-size: 12px;
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  color: var(--color-fg-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-accent-fg);
  text-decoration: underline;
}

/* ============================================================
   Utility classes (GitHub Primer-like)
   ============================================================ */
.color-fg-default  { color: var(--color-fg-default); }
.color-fg-muted    { color: var(--color-fg-muted); }
.color-fg-subtle   { color: var(--color-fg-subtle); }
.color-fg-accent   { color: var(--color-accent-fg); }
.color-fg-success  { color: var(--color-success-fg); }
.color-fg-danger   { color: var(--color-danger-fg); }
.color-fg-attention { color: var(--color-attention-fg); }

.bg-default   { background-color: var(--color-canvas-default); }
.bg-subtle    { background-color: var(--color-canvas-subtle); }
.bg-inset     { background-color: var(--color-canvas-inset); }

.border     { border: 1px solid var(--color-border-default); }
.rounded-2  { border-radius: var(--borderRadius-medium); }
.rounded-3  { border-radius: var(--borderRadius-large); }

.f1  { font-size: 32px; }
.f2  { font-size: 24px; }
.f3  { font-size: 20px; }
.f4  { font-size: 16px; }
.f5  { font-size: 14px; }
.f6  { font-size: 12px; }

.text-bold   { font-weight: 600; }
.text-normal { font-weight: 400; }
.text-light  { font-weight: 300; }
.text-center { text-align: center; }
.text-right  { text-align: right; }

.d-flex        { display: flex; }
.d-inline-flex { display: inline-flex; }
.d-block       { display: block; }
.d-none        { display: none; }

.flex-items-center  { align-items: center; }
.flex-justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }

.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 16px; }
.gap-4 { gap: 24px; }

.m-0  { margin: 0; }
.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 24px; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 16px; }
.mt-4 { margin-top: 24px; }

.p-0  { padding: 0; }
.p-2  { padding: 8px; }
.p-3  { padding: 16px; }
.p-4  { padding: 24px; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
  .github-header nav { display: none; }
  .github-header .header-search { max-width: 160px; }
  .hero { padding: 48px 16px; }
  .hero h1 { font-size: 32px; }
  .features-grid { grid-template-columns: 1fr; }
  .layout { grid-template-columns: 1fr; }
  .sidenav { display: none; }
}