:root {
  --bg: #2b2d31;
  --surface: #34373d;
  --surface-2: #3f434c;
  --text: #f2f4f8;
  --muted: #c3c8d3;
  --line: #525965;
  --brand: #8fb3ff;
  --brand-strong: #6f99f5;
  --theme-transition: 620ms cubic-bezier(0.22, 1, 0.36, 1);
  --theme-transition-fast: 420ms cubic-bezier(0.22, 1, 0.36, 1);
}

:root.light {
  --bg: #eaf4ff;
  --surface: #f4f9ff;
  --surface-2: #e3f0ff;
  --text: #15233e;
  --muted: #486282;
  --line: #c4dbf5;
  --brand: #3b79d8;
  --brand-strong: #2e66bc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at top right, #4b4f56 0%, var(--bg) 48%);
  color: var(--text);
  line-height: 1.7;
  transition: background var(--theme-transition), color var(--theme-transition);
}

:root.light body {
  background: linear-gradient(180deg, #dff0ff 0%, #edf6ff 34%, #eaf4ff 100%);
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--line);
  transition: background var(--theme-transition), border-color var(--theme-transition);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  animation: fadeSlideDown 760ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.logo {
  color: var(--text);
  font-weight: 700;
  font-size: 1.2rem;
  text-decoration: none;
  transition: color var(--theme-transition-fast);
}

.site-nav {
  display: flex;
  gap: 18px;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 10px;
  transition: color var(--theme-transition-fast), background-color var(--theme-transition-fast), transform 0.24s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text);
  background: var(--surface-2);
}

.site-nav a:hover {
  transform: translateY(-1px);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: linear-gradient(145deg, var(--surface), color-mix(in srgb, var(--surface-2) 72%, var(--surface)));
  color: var(--text);
  border-radius: 999px;
  padding: 7px 12px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow var(--theme-transition-fast), border-color var(--theme-transition-fast), background var(--theme-transition-fast), color var(--theme-transition-fast);
}

.theme-toggle:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--brand) 48%, var(--line));
  box-shadow: 0 8px 22px color-mix(in srgb, var(--brand) 20%, transparent);
}

.theme-toggle:active {
  transform: translateY(0);
}

.theme-icon {
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: color-mix(in srgb, var(--brand) 22%, transparent);
  transition: background var(--theme-transition-fast);
}

.page-content {
  padding: 44px 0 60px;
}

.page-content > * {
  opacity: 0;
  transform: translateY(14px);
  animation: fadeSlideUp 720ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.page-content > *:nth-child(1) {
  animation-delay: 90ms;
}

.page-content > *:nth-child(2) {
  animation-delay: 180ms;
}

.page-content > *:nth-child(3) {
  animation-delay: 270ms;
}

.page-content > *:nth-child(4) {
  animation-delay: 360ms;
}

.home-block {
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  transition: background var(--theme-transition), border-color var(--theme-transition);
}

.home-block-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 16px;
  margin-bottom: 14px;
}

.home-block-head h2 {
  margin: 0;
  font-size: 1.25rem;
}

.home-block-head p {
  margin: 0;
  color: var(--muted);
}

.hero {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.hero-main,
.hero-side,
.card,
.article-detail,
.quick-add {
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  transition: background var(--theme-transition), border-color var(--theme-transition), box-shadow var(--theme-transition-fast), transform var(--theme-transition-fast);
}

.card:hover,
.home-block:hover,
.quick-add:hover,
.article-detail:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px color-mix(in srgb, var(--brand) 14%, transparent);
}

.hero-main h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.hero-main p,
.hero-side p,
.page-hero p,
.card p,
.article-body p {
  color: var(--muted);
  transition: color var(--theme-transition-fast);
}

.highlight {
  color: var(--brand);
  transition: color var(--theme-transition-fast);
}

.button-row {
  margin-top: 18px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  text-decoration: none;
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: 600;
  border: 1px solid var(--line);
  transition: border-color var(--theme-transition-fast), color var(--theme-transition-fast), background-color var(--theme-transition-fast), box-shadow var(--theme-transition-fast);
}

.btn-primary {
  padding: 17px 40px;
  border-radius: 50px;
  cursor: pointer;
  border: 0;
  background-color: var(--text);
  box-shadow: rgb(0 0 0 / 5%) 0 0 8px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-size: 15px;
  transition: all 0.5s ease;
  color: var(--surface-2);
}

.btn-primary:hover {
  letter-spacing: 3px;
  background-color: var(--brand);
  color: hsl(0, 0%, 100%);
  box-shadow: var(--brand) 0px 7px 29px 0px;
}

.btn-primary:active {
  letter-spacing: 3px;
  background-color: var(--brand-strong);
  color: hsl(0, 0%, 100%);
  box-shadow: var(--brand-strong) 0px 0px 0px 0px;
  transform: translateY(10px);
  transition: 100ms;
}

.btn-secondary {
  padding: 17px 40px;
  border-radius: 50px;
  cursor: pointer;
  border: 0;
  background-color: var(--surface-2);
  box-shadow: rgb(0 0 0 / 5%) 0 0 8px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-size: 15px;
  transition: all 0.5s ease;
  color: var(--text)
}

.btn-secondary:hover {
  letter-spacing: 3px;
  background-color: var(--brand);
  color: hsl(0, 0%, 100%);
  box-shadow: var(--brand) 0px 7px 29px 0px;
}

.btn-secondary:active {
  letter-spacing: 3px;
  background-color: var(--brand-strong);
  color: hsl(0, 0%, 100%);
  box-shadow: var(--brand-strong) 0px 0px 0px 0px;
  transform: translateY(10px);
  transition: 100ms;
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}

.page-hero {
  margin-bottom: 20px;
}

.search-panel {
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px 20px;
  margin-bottom: 18px;
  transition: background var(--theme-transition), border-color var(--theme-transition);
}

.search-panel label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
}

.search-panel input {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 12px;
  outline: none;
  transition: border-color var(--theme-transition-fast), background-color var(--theme-transition-fast), color var(--theme-transition-fast), box-shadow var(--theme-transition-fast);
}

.search-panel input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 22%, transparent);
}

.search-status {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.home-repo-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.repo-card,
.repo-compact-card {
  display: flex;
  flex-direction: column;
}

.repo-card .card-link,
.repo-compact-card .card-link {
  margin-top: auto;
  align-self: flex-start;
}

.featured-post-card h3,
.repo-compact-card h3 {
  margin-top: 0;
  margin-bottom: 10px;
}

.repo-compact-card {
  padding: 18px;
}

.repo-compact-card p {
  margin-top: 0;
  margin-bottom: 12px;
}

.repo-card p {
  margin-top: 0;
  margin-bottom: 14px;
}

.card h2 {
  margin-top: 0;
}

.meta {
  margin-top: 0;
  margin-bottom: 10px;
  color: var(--brand);
  font-size: 0.92rem;
  transition: color var(--theme-transition-fast);
}

.card-link,
.back-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--brand);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--theme-transition-fast), transform 0.24s ease;
}

.card-link::after,
.back-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  border-radius: 999px;
  transform: translateX(0);
  transform-origin: left center;
  opacity: 0.62;
  transition: width 0.26s ease, transform 0.26s ease, opacity 0.26s ease;
}

.card-link:hover,
.back-link:hover {
  color: color-mix(in srgb, var(--brand) 88%, var(--text));
  transform: translateX(2px);
}

.card-link:hover::after,
.back-link:hover::after {
  width: 28px;
  transform: translateX(2px);
  opacity: 1;
}

.card-link:focus-visible,
.back-link:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--brand) 55%, transparent);
  outline-offset: 3px;
  border-radius: 4px;
}

.article-detail h1 {
  margin-top: 0;
}

.quick-add h3,
.hero-side h2 {
  margin-top: 0;
}

.profile-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.profile-head strong {
  display: block;
  font-size: 1rem;
}

.profile-head p {
  margin: 2px 0 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.avatar {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid color-mix(in srgb, var(--brand) 42%, var(--line));
  box-shadow: 0 10px 24px color-mix(in srgb, var(--brand) 16%, transparent);
}

.profile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 8px 18px;
}

.profile-grid p {
  margin: 0;
}

code {
  font-family: Consolas, "Courier New", monospace;
  background: var(--surface-2);
  padding: 2px 6px;
  border-radius: 6px;
  transition: background-color var(--theme-transition-fast), color var(--theme-transition-fast);
}

.site-footer {
  text-align: center;
  border-top: 1px solid var(--line);
  padding: 18px 0 28px;
  color: var(--muted);
  transition: border-color var(--theme-transition), color var(--theme-transition-fast);
}

@keyframes fadeSlideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(14px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@media (hover: none) and (pointer: coarse) {
  .site-nav a:hover {
    color: var(--muted);
    background: transparent;
    transform: none;
  }

  .card:hover,
  .home-block:hover,
  .quick-add:hover,
  .article-detail:hover {
    transform: none;
    box-shadow: none;
  }

  .theme-toggle:hover {
    transform: none;
    border-color: var(--line);
    box-shadow: none;
  }

  .btn-primary:hover {
    letter-spacing: 1.5px;
    background-color: var(--text);
    color: var(--surface-2);
    box-shadow: rgb(0 0 0 / 5%) 0 0 8px;
  }

  .btn-secondary:hover {
    letter-spacing: 1.5px;
    background-color: var(--surface-2);
    color: var(--text);
    box-shadow: rgb(0 0 0 / 5%) 0 0 8px;
  }

  .card-link:hover,
  .back-link:hover {
    transform: none;
  }

  .card-link::after,
  .back-link::after {
    opacity: 0;
  }
}

@media (max-width: 860px) {
  .page-content {
    padding: 28px 0 44px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .nav-wrap {
    flex-wrap: wrap;
    gap: 12px;
  }

  .site-nav {
    width: 100%;
    order: 3;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .site-nav a {
    padding: 9px 12px;
    white-space: nowrap;
  }

  .theme-toggle {
    margin-left: auto;
  }

  .avatar {
    width: 56px;
    height: 56px;
  }

  .hero-main,
  .hero-side,
  .card,
  .article-detail,
  .quick-add,
  .home-block,
  .search-panel {
    padding: 18px;
  }

  .btn-primary,
  .btn-secondary {
    padding: 13px 22px;
    font-size: 14px;
    letter-spacing: 1px;
  }
}

@media (max-width: 560px) {
  .grid,
  .home-repo-grid {
    grid-template-columns: 1fr;
  }

  .profile-head {
    margin-bottom: 12px;
  }
}