/* ============ tokens ============ */
:root {
  --bg: #0b0b0d;
  --bg-soft: #101014;
  --surface: #141419;
  --line: #23232b;
  --ink: #f2f2f0;
  --ink-dim: #9a9aa2;
  --ink-faint: #56565f;
  --accent: #d6ff3f;          /* electric lime — used sparingly */
  --accent-ink: #0b0b0d;
  --radius: 14px;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --maxw: 1120px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Space Grotesk", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

@media (pointer: fine) { body { cursor: none; } a, button { cursor: none; } }

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

a { color: inherit; text-decoration: none; }

.dim { color: var(--ink-faint); }
.accent { color: var(--accent); }

/* ============ animated grid canvas ============ */
#grid {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
  opacity: .55;
}

/* ============ custom cursor ============ */
.cursor {
  position: fixed; top: 0; left: 0;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  z-index: 9999; pointer-events: none;
  transform: translate(-50%, -50%);
  transition: width .25s var(--ease), height .25s var(--ease), background .25s var(--ease), opacity .3s;
  mix-blend-mode: difference;
}
.cursor.is-hot { width: 44px; height: 44px; background: #fff; }
@media (pointer: coarse) { .cursor { display: none; } }

/* ============ nav ============ */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px clamp(20px, 5vw, 60px);
  transition: padding .4s var(--ease), background .4s var(--ease), border-color .4s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  padding: 12px clamp(20px, 5vw, 60px);
  background: rgba(11, 11, 13, .72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.brand__mark {
  display: grid; place-items: center;
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--accent); color: var(--accent-ink);
  font-size: 15px; font-weight: 700;
}
.brand__name { font-size: 16px; letter-spacing: .5px; }
.nav__links { display: flex; gap: clamp(16px, 3vw, 34px); }
.nav__links a {
  font-family: "JetBrains Mono", monospace;
  font-size: 13px; color: var(--ink-dim);
  position: relative; padding: 4px 0;
  transition: color .25s;
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: right;
  transition: transform .35s var(--ease);
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { transform: scaleX(1); transform-origin: left; }
@media (max-width: 640px) { .nav__links a:nth-child(3), .nav__links a:nth-child(1) { display: none; } }

/* ============ layout ============ */
main { position: relative; z-index: 1; }
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(80px, 14vh, 160px) clamp(20px, 5vw, 60px);
}
.section__head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 48px; }
.section__idx {
  font-family: "JetBrains Mono", monospace; font-size: 13px;
  color: var(--accent); letter-spacing: 1px;
}
.section__title { font-size: clamp(28px, 4vw, 44px); font-weight: 600; letter-spacing: -.5px; }

/* ============ hero ============ */
.hero {
  max-width: var(--maxw); margin: 0 auto;
  padding: clamp(140px, 22vh, 240px) clamp(20px, 5vw, 60px) 60px;
  min-height: 100vh; display: flex; flex-direction: column; justify-content: center;
}
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: "JetBrains Mono", monospace; font-size: 13px;
  color: var(--ink-dim); margin-bottom: 26px;
}
.tick {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 0 rgba(214, 255, 63, .5);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(214, 255, 63, .5); }
  70% { box-shadow: 0 0 0 10px rgba(214, 255, 63, 0); }
  100% { box-shadow: 0 0 0 0 rgba(214, 255, 63, 0); }
}
.hero__title {
  font-size: clamp(38px, 7.2vw, 92px);
  font-weight: 700; line-height: 1.02; letter-spacing: -1.5px;
  margin-bottom: 30px;
}
.hero__title span { display: block; }
.hero__lede {
  max-width: 560px; font-size: clamp(16px, 1.6vw, 19px);
  color: var(--ink-dim); margin-bottom: 40px;
}
.hero__cta { display: flex; gap: 16px; flex-wrap: wrap; }

/* ============ buttons ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 26px; border-radius: 100px;
  font-size: 15px; font-weight: 500;
  transition: transform .3s var(--ease), background .3s, color .3s, border-color .3s;
  will-change: transform;
}
.btn--solid { background: var(--accent); color: var(--accent-ink); }
.btn--solid:hover { background: #e9ff7a; }
.btn--ghost { border: 1px solid var(--line); color: var(--ink); }
.btn--ghost:hover { border-color: var(--ink-dim); background: var(--surface); }

/* ============ ticker ============ */
.ticker {
  margin-top: clamp(56px, 10vh, 96px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 18px 0; overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.ticker__track {
  display: flex; gap: 40px; width: max-content;
  animation: scroll 32s linear infinite;
}
.ticker__track span {
  font-family: "JetBrains Mono", monospace; font-size: 15px;
  color: var(--ink-faint); white-space: nowrap;
  display: inline-flex; align-items: center; gap: 40px;
}
.ticker__track span::after { content: "◆"; color: var(--accent); font-size: 8px; }
@keyframes scroll { to { transform: translateX(-50%); } }
.ticker:hover .ticker__track { animation-play-state: paused; }

/* ============ about ============ */
.about { display: grid; grid-template-columns: 1.4fr 1fr; gap: clamp(40px, 6vw, 90px); }
.about__text p { font-size: clamp(17px, 1.7vw, 20px); color: var(--ink-dim); margin-bottom: 22px; }
.about__text strong { color: var(--ink); font-weight: 600; }
.about__facts { list-style: none; display: flex; flex-direction: column; gap: 26px; }
.about__facts li { border-top: 1px solid var(--line); padding-top: 16px; }
.about__facts .num {
  display: block; font-size: clamp(38px, 5vw, 56px); font-weight: 700;
  letter-spacing: -1px; color: var(--ink); line-height: 1;
}
.about__facts .lead {
  display: block; font-size: clamp(34px, 4.4vw, 50px); font-weight: 700;
  letter-spacing: -1px; color: var(--accent); line-height: 1;
}
.about__facts .lbl { font-family: "JetBrains Mono", monospace; font-size: 13px; color: var(--ink-faint); }
@media (max-width: 760px) { .about { grid-template-columns: 1fr; } }

/* ============ stack cards ============ */
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 30px;
  position: relative; overflow: hidden;
  transition: transform .4s var(--ease), border-color .4s, background .4s;
}
.card::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 0%), rgba(214,255,63,.08), transparent 60%);
  opacity: 0; transition: opacity .4s;
}
.card:hover { transform: translateY(-4px); border-color: #33333d; }
.card:hover::before { opacity: 1; }
.card__top { display: flex; align-items: baseline; gap: 12px; margin-bottom: 14px; }
.card__k { font-family: "JetBrains Mono", monospace; font-size: 12px; color: var(--accent); }
.card h3 { font-size: 22px; font-weight: 600; }
.card p { color: var(--ink-dim); font-size: 15px; margin-bottom: 20px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tags span {
  font-family: "JetBrains Mono", monospace; font-size: 12px; color: var(--ink-dim);
  border: 1px solid var(--line); border-radius: 100px; padding: 4px 12px;
}
@media (max-width: 640px) { .cards { grid-template-columns: 1fr; } }

/* ============ work ============ */
.work { border-top: 1px solid var(--line); }
.proj {
  display: grid; grid-template-columns: 180px 1fr auto; align-items: center; gap: 30px;
  padding: 32px 8px; border-bottom: 1px solid var(--line);
  position: relative; transition: padding .4s var(--ease);
}
.proj::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: var(--surface); border-radius: var(--radius);
  transform: scaleY(.6); opacity: 0;
  transition: transform .4s var(--ease), opacity .4s;
}
.proj:hover { padding-left: 24px; padding-right: 24px; }
.proj:hover::before { transform: scaleY(1); opacity: 1; }
.proj__meta { font-family: "JetBrains Mono", monospace; font-size: 12px; color: var(--ink-faint); }
.proj__title { font-size: clamp(20px, 2.4vw, 28px); font-weight: 600; transition: color .3s; }
.proj:hover .proj__title { color: var(--accent); }
.proj__desc { grid-column: 2; font-size: 14px; color: var(--ink-dim); margin-top: 4px; }
.proj__go { font-family: "JetBrains Mono", monospace; font-size: 13px; color: var(--ink-dim); white-space: nowrap; }
.proj__go em { font-style: normal; display: inline-block; transition: transform .3s var(--ease); }
.proj:hover .proj__go { color: var(--ink); }
.proj:hover .proj__go em { transform: translate(3px, -3px); }
.work__note { margin-top: 30px; font-family: "JetBrains Mono", monospace; font-size: 13px; color: var(--ink-faint); }
@media (max-width: 700px) {
  .proj { grid-template-columns: 1fr; gap: 8px; }
  .proj__desc { grid-column: 1; }
}

/* ============ contact ============ */
.contact__lede { font-size: clamp(18px, 2vw, 24px); color: var(--ink-dim); max-width: 520px; margin-bottom: 30px; }
.contact__handle {
  display: inline-block; font-size: clamp(30px, 6vw, 68px); font-weight: 700;
  letter-spacing: -1.5px; position: relative; margin-bottom: 44px; color: var(--ink);
  transition: color .3s;
}
.contact__handle .contact__go { display: inline-block; transition: transform .3s var(--ease); }
.contact__handle:hover { color: var(--accent); }
.contact__handle:hover .contact__go { transform: translate(4px, -4px); }
.contact__links { display: flex; gap: 14px; flex-wrap: wrap; }
.contact__links a {
  font-family: "JetBrains Mono", monospace; font-size: 14px; color: var(--ink-dim);
  border: 1px solid var(--line); border-radius: 100px; padding: 10px 20px;
  transition: color .3s, border-color .3s, background .3s;
}
.contact__links a:hover { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); }

/* ============ footer ============ */
.foot {
  max-width: var(--maxw); margin: 0 auto;
  padding: 40px clamp(20px, 5vw, 60px);
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
  font-family: "JetBrains Mono", monospace; font-size: 12px; color: var(--ink-faint);
  position: relative; z-index: 1;
}

/* ============ reveal on scroll ============ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}