:root {
  --bg: #08090d;
  --bg-elev: rgba(15, 17, 24, 0.76);
  --card: rgba(18, 20, 29, 0.72);
  --card-solid: #11131a;
  --text: #f4f5f7;
  --muted: #9aa0ad;
  --faint: #6e7480;
  --line: rgba(255, 255, 255, 0.10);
  --line-strong: rgba(255, 255, 255, 0.18);
  --accent: #a9ff68;
  --accent-2: #8aa8ff;
  --accent-3: #de9cff;
  --shadow: 0 30px 100px rgba(0, 0, 0, 0.34);
  --radius: 24px;
  --max: 1220px;
}

html[data-theme="light"] {
  --bg: #f4f5f1;
  --bg-elev: rgba(255, 255, 255, 0.82);
  --card: rgba(255, 255, 255, 0.74);
  --card-solid: #ffffff;
  --text: #15171b;
  --muted: #626975;
  --faint: #7d8490;
  --line: rgba(20, 24, 32, 0.10);
  --line-strong: rgba(20, 24, 32, 0.17);
  --shadow: 0 30px 100px rgba(27, 31, 40, 0.10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }
::selection { background: var(--accent); color: #10130d; }

.grid-noise {
  position: fixed;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  opacity: .36;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 70%);
}

.ambient {
  position: fixed;
  z-index: -2;
  width: 620px;
  height: 620px;
  border-radius: 999px;
  filter: blur(110px);
  opacity: .13;
  pointer-events: none;
}
.ambient-a { top: -260px; right: -160px; background: var(--accent-2); }
.ambient-b { top: 420px; left: -330px; background: var(--accent); opacity: .08; }

.section-shell { width: min(var(--max), calc(100% - 48px)); margin-inline: auto; }
.site-header {
  position: sticky;
  top: 14px;
  z-index: 50;
  width: min(var(--max), calc(100% - 32px));
  height: 64px;
  margin: 14px auto 0;
  padding: 0 14px 0 18px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg-elev) 92%, transparent);
  backdrop-filter: blur(20px) saturate(140%);
  border-radius: 18px;
  box-shadow: 0 10px 40px rgba(0,0,0,.10);
}
.brand, .footer-brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 650; letter-spacing: -.02em; }
.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: #11140d;
  background: var(--accent);
  border-radius: 10px;
  font-size: 15px;
  font-weight: 900;
  letter-spacing: -.08em;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.08);
}
.brand-mark.small { width: 30px; height: 30px; font-size: 13px; border-radius: 9px; }
.desktop-nav { display: flex; align-items: center; gap: 6px; }
.desktop-nav a { padding: 9px 13px; color: var(--muted); border-radius: 10px; font-size: 14px; transition: .2s ease; }
.desktop-nav a:hover { color: var(--text); background: var(--line); }
.header-actions { justify-self: end; display: flex; align-items: center; gap: 8px; }
.icon-button, .github-button {
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  color: var(--text);
  background: transparent;
  border-radius: 11px;
  cursor: pointer;
  transition: .2s ease;
}
.icon-button { width: 38px; }
.icon-button:hover, .github-button:hover { border-color: var(--line-strong); background: var(--line); transform: translateY(-1px); }
.icon-button svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.7; }
.github-button { gap: 8px; padding: 0 13px; font-size: 13px; font-weight: 600; }
.github-button svg { width: 17px; height: 17px; fill: currentColor; }

.hero {
  min-height: 760px;
  padding: 118px 0 90px;
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: 72px;
  align-items: center;
}
.eyebrow { color: var(--muted); font: 650 11px/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: .14em; }
.status-dot { width: 7px; height: 7px; display: inline-block; margin-right: 9px; border-radius: 999px; background: var(--accent); box-shadow: 0 0 18px var(--accent); }
.hero h1 { margin: 26px 0 22px; font-size: clamp(72px, 8vw, 128px); line-height: .82; letter-spacing: -.078em; font-weight: 770; }
.hero h1 span { color: var(--accent); }
.hero-lead { margin: 0 0 16px; font-size: clamp(21px, 2.2vw, 31px); letter-spacing: -.035em; font-weight: 580; }
.hero-description { max-width: 680px; margin: 0; color: var(--muted); font-size: 16px; line-height: 1.9; }
.hero-actions { margin-top: 34px; display: flex; align-items: center; gap: 24px; }
.primary-button {
  min-height: 48px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  gap: 18px;
  color: #11140d;
  background: var(--accent);
  border-radius: 13px;
  font-size: 14px;
  font-weight: 750;
  transition: .2s ease;
}
.primary-button:hover { transform: translateY(-2px); box-shadow: 0 12px 36px color-mix(in srgb, var(--accent) 18%, transparent); }
.text-link { color: var(--muted); font-size: 14px; font-weight: 600; transition: .2s ease; }
.text-link:hover { color: var(--text); }

.hero-panel { position: relative; border: 1px solid var(--line); border-radius: 28px; background: var(--card); box-shadow: var(--shadow); overflow: hidden; }
.hero-panel::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(circle at 88% 5%, color-mix(in srgb, var(--accent-2) 16%, transparent), transparent 34%); }
.panel-topline { position: relative; padding: 16px 18px; display: flex; justify-content: space-between; color: var(--faint); border-bottom: 1px solid var(--line); font: 650 10px/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .12em; }
.live-pill { display: inline-flex; align-items: center; gap: 6px; }
.live-pill i { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.terminal-card { position: relative; min-height: 292px; padding: 28px 27px; font: 500 13px/2.05 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.terminal-dots { display: flex; gap: 6px; margin-bottom: 24px; }
.terminal-dots i { width: 8px; height: 8px; border-radius: 50%; background: var(--line-strong); }
.terminal-line { color: var(--text); }
.terminal-line.muted { color: var(--faint); }
.prompt { color: var(--accent); }
.terminal-cursor { margin-top: 11px; color: var(--accent); }
.terminal-cursor span { display: inline-block; width: 7px; height: 15px; margin-left: -7px; background: var(--accent); animation: blink 1s steps(1) infinite; vertical-align: -2px; }
@keyframes blink { 50% { opacity: 0; } }
.stat-strip { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.stat-strip > div { padding: 19px 20px; display: flex; flex-direction: column; gap: 4px; }
.stat-strip > div + div { border-left: 1px solid var(--line); }
.stat-strip strong { font-size: 24px; letter-spacing: -.04em; }
.stat-strip span { color: var(--faint); font: 500 10px ui-monospace, SFMono-Regular, Menlo, monospace; text-transform: uppercase; letter-spacing: .06em; }

.signal-strip { border-block: 1px solid var(--line); overflow: hidden; }
.signal-track { width: max-content; padding: 16px 0; display: flex; gap: 28px; align-items: center; color: var(--faint); font: 650 10px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .13em; animation: marquee 34s linear infinite; }
.signal-track i { color: var(--accent); font-style: normal; font-size: 7px; }
@keyframes marquee { to { transform: translateX(-50%); } }

.projects, .focus, .about { padding-top: 126px; }
.section-heading { margin-bottom: 46px; display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 40px; }
.section-kicker { display: block; margin-bottom: 16px; color: var(--accent); font: 700 10px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .14em; }
.section-heading h2 { margin: 0; font-size: clamp(38px, 5vw, 66px); line-height: 1; letter-spacing: -.055em; }
.section-heading p { justify-self: end; max-width: 480px; margin: 0; color: var(--muted); line-height: 1.85; font-size: 14px; }

.featured-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.feature-card { position: relative; min-height: 440px; padding: 24px; display: flex; flex-direction: column; justify-content: space-between; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: .28s cubic-bezier(.2,.8,.2,1); }
.feature-card:hover { transform: translateY(-7px); border-color: var(--line-strong); box-shadow: 0 28px 70px rgba(0,0,0,.16); }
.feature-esa { background: linear-gradient(145deg, color-mix(in srgb, var(--accent) 13%, var(--card-solid)), var(--card-solid) 55%); }
.feature-microread { background: linear-gradient(145deg, color-mix(in srgb, var(--accent-2) 15%, var(--card-solid)), var(--card-solid) 55%); }
.feature-card::after { content: ""; position: absolute; width: 260px; height: 260px; border: 1px solid var(--line); border-radius: 50%; top: -130px; right: -110px; box-shadow: 0 0 0 36px transparent, 0 0 0 37px var(--line), 0 0 0 72px transparent, 0 0 0 73px var(--line); opacity: .55; transition: .35s ease; }
.feature-card:hover::after { transform: scale(1.06) rotate(7deg); }
.feature-card-head { position: relative; z-index: 2; display: flex; justify-content: space-between; color: var(--faint); font: 600 11px ui-monospace, SFMono-Regular, Menlo, monospace; }
.project-arrow { width: 34px; height: 34px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--text); font-size: 15px; }
.project-symbol { position: relative; z-index: 1; margin: auto 0; font-size: clamp(66px, 7vw, 112px); line-height: 1; font-weight: 850; letter-spacing: -.09em; color: color-mix(in srgb, var(--text) 92%, transparent); opacity: .92; }
.project-symbol.glyph { letter-spacing: -.12em; font-size: clamp(68px, 6vw, 98px); }
.project-symbol.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: clamp(50px, 4.8vw, 78px); letter-spacing: -.08em; }
.project-copy { position: relative; z-index: 2; }
.project-meta { margin-bottom: 12px; display: flex; align-items: center; flex-wrap: wrap; gap: 7px; color: var(--faint); font: 600 10px ui-monospace, SFMono-Regular, Menlo, monospace; text-transform: uppercase; letter-spacing: .07em; }
.lang-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); }
.lang-dot.python { background: #5ea9ff; }
.lang-dot.typescript { background: #78b3ff; }
.lang-dot.cpp { background: #d98cff; }
.project-copy h3 { margin: 0 0 10px; font-size: 22px; letter-spacing: -.035em; }
.project-copy p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.75; }

.focus-grid { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.focus-card { min-height: 360px; padding: 30px; display: flex; flex-direction: column; background: var(--card); }
.focus-card + .focus-card { border-left: 1px solid var(--line); }
.focus-number { width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--accent); font: 700 11px ui-monospace, SFMono-Regular, Menlo, monospace; }
.focus-card h3 { margin: 88px 0 16px; font-size: 23px; letter-spacing: -.035em; }
.focus-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }
.focus-tag { margin-top: auto; padding-top: 26px; color: var(--faint); border-top: 1px solid var(--line); font: 600 9px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }

.about { padding-bottom: 126px; }
.about-card { position: relative; min-height: 530px; padding: 42px; display: grid; grid-template-columns: .58fr 1.35fr; gap: 44px; align-items: start; border: 1px solid var(--line); border-radius: 30px; background: linear-gradient(145deg, color-mix(in srgb, var(--accent) 8%, var(--card-solid)), var(--card-solid)); overflow: hidden; }
.about-card::after { content: "L³"; position: absolute; right: -18px; bottom: -72px; color: var(--text); opacity: .035; font-size: 330px; font-weight: 900; line-height: 1; letter-spacing: -.12em; pointer-events: none; }
.about-label { color: var(--accent); font: 700 10px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .13em; }
.about-copy h2 { margin: -4px 0 30px; font-size: clamp(48px, 6vw, 86px); line-height: .98; letter-spacing: -.065em; }
.about-copy h2 span { color: var(--muted); }
.about-copy p { max-width: 700px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.9; }
.about-copy .about-note { margin-top: 18px; color: var(--faint); font-size: 12px; }
.about-github { grid-column: 1 / -1; align-self: end; min-height: 86px; padding: 20px 24px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 6px; border-top: 1px solid var(--line); color: var(--muted); }
.about-github strong { color: var(--text); font-size: 18px; }
.about-github b { color: var(--accent); font-size: 22px; transition: .2s ease; }
.about-github:hover b { transform: translate(4px,-4px); }

.site-footer { min-height: 110px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 20px; color: var(--faint); border-top: 1px solid var(--line); font-size: 11px; }
.site-footer p { margin: 0; font: 600 10px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .12em; text-transform: uppercase; }
.site-footer > span { justify-self: end; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s cubic-bezier(.2,.8,.2,1); }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1000px) {
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 48px; padding-top: 96px; }
  .hero-copy { max-width: 800px; }
  .hero-panel { max-width: 700px; }
  .featured-grid { grid-template-columns: 1fr 1fr; }
  .feature-card { min-height: 410px; }
  .focus-grid { grid-template-columns: 1fr; }
  .focus-card { min-height: 260px; }
  .focus-card + .focus-card { border-left: 0; border-top: 1px solid var(--line); }
  .focus-card h3 { margin-top: 50px; }
}

@media (max-width: 760px) {
  .section-shell { width: min(100% - 28px, var(--max)); }
  .site-header { width: calc(100% - 20px); top: 8px; margin-top: 8px; grid-template-columns: 1fr auto; }
  .desktop-nav { display: none; }
  .brand-name { font-size: 13px; }
  .github-button { width: 38px; padding: 0; font-size: 0; }
  .hero { padding: 88px 0 66px; }
  .hero h1 { font-size: clamp(66px, 23vw, 98px); }
  .hero-description { font-size: 14px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 16px; }
  .terminal-card { min-height: 270px; padding: 24px 20px; font-size: 11px; }
  .stat-strip strong { font-size: 20px; }
  .stat-strip > div { padding: 16px 12px; }
  .section-heading { grid-template-columns: 1fr; gap: 18px; }
  .section-heading p { justify-self: start; }
  .projects, .focus, .about { padding-top: 90px; }
  .featured-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 390px; }
  .about-card { min-height: 560px; padding: 28px 24px; grid-template-columns: 1fr; gap: 28px; }
  .about-copy h2 { font-size: clamp(46px, 15vw, 68px); }
  .about-github { padding-inline: 0; grid-template-columns: 1fr auto; }
  .about-github > span { grid-column: 1 / -1; }
  .site-footer { min-height: 150px; padding: 28px 0; grid-template-columns: 1fr auto; }
  .site-footer p { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}