:root {
  --bg: #edf2f8;
  --paper: #ffffff;
  --ink: #101d31;
  --muted: #5b6b84;
  --line: #bfd0e6;
  --line-strong: #a6bbd8;
  --accent: #0a8f6a;
  --accent-bright: #10b981;
  --accent-gold: #b98b2f;
  --terminal: #0b1729;
  --terminal-soft: #13263f;
  --shadow: 0 18px 48px rgba(16, 29, 49, 0.12);
}

:root[data-theme="dark"] {
  --bg: #050b14;
  --paper: #0b1423;
  --ink: #f2f7ff;
  --muted: #9ab0cf;
  --line: #243952;
  --line-strong: #38608a;
  --accent: #15b783;
  --accent-bright: #29d099;
  --accent-gold: #f5a524;
  --terminal: #040910;
  --terminal-soft: #0a1627;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  color: var(--ink);
  background: #ffffff;
  line-height: 1.6;
  overflow-x: hidden;
  transition:
    background 260ms ease,
    color 260ms ease;
}

:root[data-theme="dark"] body {
  background:
    radial-gradient(
      circle at 8% 10%,
      rgba(21, 183, 131, 0.16),
      transparent 30%
    ),
    radial-gradient(
      circle at 92% 2%,
      rgba(245, 165, 36, 0.16),
      transparent 24%
    ),
    linear-gradient(180deg, #060d18 0%, #040910 100%);
}

.bg-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  background-image:
    linear-gradient(rgba(16, 29, 49, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 29, 49, 0.045) 1px, transparent 1px);
  background-size: 34px 34px;
}

:root[data-theme="dark"] .bg-noise {
  opacity: 0.1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.2rem;
  backdrop-filter: blur(10px);
  background: #ffffff;
  border-bottom: 1px solid rgba(166, 187, 216, 0.7);
}

:root[data-theme="dark"] .site-header {
  background: rgba(6, 13, 24, 0.86);
  border-bottom-color: rgba(56, 96, 138, 0.8);
}

.brand {
  text-decoration: none;
  font-family: "JetBrains Mono", "Consolas", monospace;
  font-size: 1.4rem;
  color: var(--ink);
  letter-spacing: 0.12em;
  font-weight: 700;
}

.top-nav {
  display: flex;
  gap: 1rem;
}

.theme-toggle {
  border: 1px solid var(--line-strong);
  background: #ffffff;
  color: var(--ink);
  border-radius: 0.65rem;
  font-family: "JetBrains Mono", "Consolas", monospace;
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 220ms ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(16, 29, 49, 0.16);
}

:root[data-theme="dark"] .theme-toggle {
  background: linear-gradient(140deg, #172b42, #122338);
  border-color: rgba(245, 165, 36, 0.5);
}

.top-nav a {
  color: var(--ink);
  text-decoration: none;
  font-family: "JetBrains Mono", "Consolas", monospace;
  font-weight: 600;
  font-size: 0.9rem;
  position: relative;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.top-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: right;
  background: linear-gradient(90deg, var(--accent), var(--accent-gold));
  transition: transform 220ms ease;
}

.top-nav a:hover::after,
.top-nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

main {
  width: min(1100px, 92vw);
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.hero {
  padding: 3.5rem clamp(1rem, 4vw, 3rem);
  border: 1px solid var(--line-strong);
  border-radius: 1.4rem;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.88)),
    url("lujiazui Large.jpeg");
  background-size: cover;
  background-position: 62% 38%;
  background-repeat: no-repeat;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero::after {
  content: "";
  position: absolute;
  top: -20%;
  right: -12%;
  width: 44%;
  height: 140%;
  background: linear-gradient(
    165deg,
    rgba(16, 185, 129, 0.16),
    rgba(185, 139, 47, 0.08) 42%,
    transparent 70%
  );
  transform: skewX(-14deg);
  pointer-events: none;
}

.eyebrow {
  margin: 0;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.82rem;
  font-family: "JetBrains Mono", "Consolas", monospace;
}

h1,
h2,
h3 {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  line-height: 1.2;
}

h1 {
  margin: 0.3rem 0 1rem;
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  letter-spacing: -0.02em;
}

.hero-copy {
  margin: 0;
  max-width: 60ch;
  color: #4c5f79;
  font-size: 1.06rem;
}

.hero-actions {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.65rem;
  font-weight: 700;
  font-family: "JetBrains Mono", "Consolas", monospace;
  letter-spacing: 0.02em;
  text-decoration: none;
  padding: 0.7rem 1.2rem;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(29, 41, 57, 0.15);
}

.btn-solid {
  background: linear-gradient(140deg, var(--accent), var(--accent-bright));
  color: #ffffff;
}

.btn-ghost {
  border: 1px solid var(--line-strong);
  color: var(--ink);
  background: #ffffff;
}

:root[data-theme="dark"] .btn-ghost {
  background: rgba(12, 28, 49, 0.92);
  color: #f2f7ff;
  border-color: rgba(86, 122, 166, 0.85);
}

.stats {
  margin-top: 1.8rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stats article {
  border: 1px solid var(--line-strong);
  border-radius: 0.9rem;
  padding: 0.9rem;
  background: #ffffff;
}

.stats h2 {
  margin: 0;
  font-size: 1.9rem;
  font-family: "JetBrains Mono", "Consolas", monospace;
  color: #0d2748;
}

.metric-number {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.stats p {
  margin: 0.1rem 0 0;
  color: var(--muted);
}

.card,
#repos,
.connect {
  margin-top: 2rem;
}

#connect {
  margin-top: 1.4rem;
}

.card,
.connect {
  border: 1px solid var(--line-strong);
  border-radius: 1.1rem;
  padding: clamp(1rem, 3vw, 2rem);
  background: var(--paper);
  box-shadow: var(--shadow);
}

:root[data-theme="dark"] .hero,
:root[data-theme="dark"] .card,
:root[data-theme="dark"] .connect,
:root[data-theme="dark"] .repo-card,
:root[data-theme="dark"] .stats article {
  background: linear-gradient(
    155deg,
    rgba(11, 20, 35, 0.98),
    rgba(8, 16, 28, 0.98)
  );
  border-color: rgba(56, 96, 138, 0.72);
}

:root[data-theme="dark"] .hero {
  background-image:
    linear-gradient(160deg, rgba(7, 12, 22, 0.84), rgba(5, 10, 18, 0.82)),
    url("lujiazui Large.jpeg");
  background-position: 62% 38%;
}

@media (max-width: 1024px) {
  .hero {
    background-position: 66% 35%;
  }

  :root[data-theme="dark"] .hero {
    background-position: 66% 35%;
  }
}

:root[data-theme="dark"] .hero {
  box-shadow:
    inset 0 0 0 1px rgba(245, 165, 36, 0.12),
    0 20px 48px rgba(0, 0, 0, 0.48);
}

:root[data-theme="dark"] .stats h2,
:root[data-theme="dark"] .repo-link,
:root[data-theme="dark"] .brand,
:root[data-theme="dark"] .top-nav a {
  color: #f2f7ff;
}

.section-head h2 {
  margin: 0;
}

.section-head p {
  margin-top: 0.35rem;
  color: var(--muted);
}

.language-ticker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 0.7rem;
}

.ticker-pill {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.3rem 0.65rem;
  font-family: "JetBrains Mono", "Consolas", monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  background: #ffffff;
}

:root[data-theme="dark"] .ticker-pill {
  background: linear-gradient(
    140deg,
    rgba(21, 183, 131, 0.2),
    rgba(245, 165, 36, 0.2)
  );
}

.repo-toolbar {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 1rem 0;
}

.repo-toolbar select {
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.6rem;
  font-family: "JetBrains Mono", "Consolas", monospace;
  background: #ffffff;
}

:root[data-theme="dark"] .repo-toolbar select {
  background: #0f1c30;
  color: var(--ink);
}

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

.repo-card {
  border: 1px solid var(--line-strong);
  border-radius: 1rem;
  padding: 0.9rem;
  background: #ffffff;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}

.repo-card:hover,
.repo-card:focus-within {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px rgba(16, 29, 49, 0.15);
}

:root[data-theme="dark"] .repo-card:hover,
:root[data-theme="dark"] .repo-card:focus-within {
  box-shadow:
    inset 0 0 0 1px rgba(21, 183, 131, 0.2),
    0 12px 28px rgba(0, 0, 0, 0.45);
}

.repo-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.6rem;
}

.repo-top h3 {
  margin: 0;
  font-size: 1.1rem;
  flex: 1;
  min-width: 0;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.repo-link {
  color: var(--ink);
  text-decoration: none;
  display: block;
}

.repo-link:hover,
.repo-link:focus-visible {
  text-decoration: underline;
}

.repo-language {
  background: rgba(185, 139, 47, 0.16);
  color: #6f5418;
  border: 1px solid rgba(185, 139, 47, 0.3);
  border-radius: 0.45rem;
  padding: 0.2rem 0.6rem;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: "JetBrains Mono", "Consolas", monospace;
  white-space: nowrap;
}

.repo-desc {
  color: var(--muted);
  min-height: 3.8em;
  margin-bottom: 0.6rem;
}

.repo-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-weight: 600;
  color: #324967;
  font-family: "JetBrains Mono", "Consolas", monospace;
  font-size: 0.84rem;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.repo-metric {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.repo-metric-positive,
.repo-metric-recent {
  color: #0b8f63;
}

.repo-metric-neutral {
  color: #8b6a21;
}

.repo-metric-stale {
  color: #c64242;
}

.connect-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.connect a {
  color: var(--accent);
  font-weight: 700;
}

:root[data-theme="dark"] .repo-language {
  color: #e8c57b;
}

:root[data-theme="dark"] .repo-metric-positive,
:root[data-theme="dark"] .repo-metric-recent {
  color: #2bd39a;
}

:root[data-theme="dark"] .repo-metric-neutral {
  color: #e5b34f;
}

:root[data-theme="dark"] .repo-metric-stale {
  color: #ff6b6b;
}

footer {
  text-align: center;
  color: var(--muted);
  margin: 2.6rem 0 1rem;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  animation: rise 600ms cubic-bezier(0.2, 0.6, 0.2, 1) forwards;
}

.stagger {
  animation-delay: 140ms;
}

#repos {
  animation-delay: 220ms;
}

#connect {
  animation-delay: 300ms;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 820px) {
  .site-header {
    flex-direction: column;
    gap: 0.75rem;
  }

  .top-nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .stats {
    grid-template-columns: 1fr;
  }

  .theme-toggle {
    width: 100%;
  }

  #connect {
    margin-top: 1.2rem;
  }

  .hero {
    background-position: 70% 30%;
  }

  :root[data-theme="dark"] .hero {
    background-position: 70% 30%;
  }
}

@media (max-width: 480px) {
  .hero {
    background-position: 74% 26%;
  }

  :root[data-theme="dark"] .hero {
    background-position: 74% 26%;
  }
}