/* ============================================================
   CODEPHOBIA — engineering-blueprint dark / electric-lime signal
   ============================================================ */
:root{
  --bg:#0a0c0b;
  --bg-2:#0f1311;
  --surface:#121715;
  --surface-2:#171d1a;
  --line:rgba(198,244,50,.10);
  --line-soft:rgba(255,255,255,.06);
  --ink:#eef2ec;
  --ink-mut:#8b938b;
  --ink-dim:#5e655e;
  --acc:#c6f432;        /* electric lime */
  --acc-deep:#9ace00;
  --cool:#3a7d6e;       /* muted teal counter-accent */
  --r:14px;
  --maxw:1180px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --display:"Bricolage Grotesque","Pretendard Variable",Pretendard,system-ui,sans-serif;
  --kr:"Pretendard Variable",Pretendard,system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,monospace;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--kr);
  background:var(--bg);
  color:var(--ink);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:var(--acc);color:#0a0c0b}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* ---------- backdrop ---------- */
.backdrop{position:fixed;inset:0;z-index:-1;overflow:hidden;background:
  radial-gradient(1200px 600px at 80% -10%,#0e1411 0%,transparent 60%),
  var(--bg);}
.grid-lines{position:absolute;inset:-2px;
  background-image:
    linear-gradient(var(--line-soft) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 75%);
  mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 75%);
  opacity:.7;}
.glow{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;will-change:transform}
.glow--lime{width:520px;height:520px;background:rgba(198,244,50,.16);top:-160px;right:-80px}
.glow--cool{width:460px;height:460px;background:rgba(58,125,110,.18);bottom:-160px;left:-120px}
.grain{position:absolute;inset:0;opacity:.05;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}

/* ---------- shared ---------- */
.section{max-width:var(--maxw);margin:0 auto;padding:clamp(72px,11vw,140px) 24px}
.kicker{font-family:var(--mono);font-size:.72rem;letter-spacing:.22em;color:var(--acc);text-transform:uppercase;margin-bottom:18px}
.mono{font-family:var(--mono)}
h2{font-family:var(--display);font-weight:800;font-size:clamp(2rem,5vw,3.4rem);line-height:1.05;letter-spacing:-.02em}
h3{font-family:var(--display);font-weight:700;font-size:1.3rem;letter-spacing:-.01em}
.section__head{max-width:640px;margin-bottom:clamp(40px,6vw,72px)}
.section__lead{color:var(--ink-mut);font-size:1.05rem;margin-top:18px;max-width:56ch}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.5em;font-family:var(--display);font-weight:700;
  font-size:.95rem;padding:.72em 1.25em;border-radius:999px;border:1px solid transparent;
  transition:transform .25s var(--ease),background .25s,color .25s,box-shadow .25s;cursor:pointer}
.btn--lg{padding:.92em 1.6em;font-size:1.02rem}
.btn--accent{background:var(--acc);color:#0a0c0b;box-shadow:0 0 0 0 rgba(198,244,50,.5)}
.btn--accent:hover{transform:translateY(-2px);box-shadow:0 12px 30px -8px rgba(198,244,50,.5)}
.btn--ghost{background:transparent;color:var(--ink);border-color:rgba(255,255,255,.18)}
.btn--ghost:hover{border-color:var(--acc);color:var(--acc);transform:translateY(-2px)}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:24px;
  max-width:var(--maxw);margin:0 auto;padding:18px 24px;
  backdrop-filter:saturate(140%) blur(8px)}
.nav::after{content:"";position:absolute;left:24px;right:24px;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--line-soft),transparent)}
.brand{display:flex;align-items:center;gap:.5em;font-family:var(--display);font-weight:800;letter-spacing:-.02em;font-size:1.12rem}
.brand__mark{color:var(--acc);transform:translateY(-1px)}
.nav__links{display:flex;gap:28px;margin-left:auto;font-size:.95rem;color:var(--ink-mut)}
.nav__links a{position:relative;transition:color .2s}
.nav__links a:hover{color:var(--ink)}
.nav__links a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:1px;background:var(--acc);transition:width .25s var(--ease)}
.nav__links a:hover::after{width:100%}
.nav__cta{margin-left:4px}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;margin-left:auto;padding:6px}
.nav__toggle span{width:24px;height:2px;background:var(--ink);transition:.3s var(--ease)}
.nav__toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav__toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav__toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{position:sticky;top:60px;z-index:49;display:flex;flex-direction:column;gap:8px;
  padding:16px 24px 24px;background:var(--bg-2);border-bottom:1px solid var(--line-soft)}
.mobile-menu[hidden]{display:none}
.mobile-menu a{padding:10px 0;color:var(--ink-mut)}
.mobile-menu .btn{align-self:flex-start;margin-top:8px}

/* ---------- hero ---------- */
.hero{max-width:var(--maxw);margin:0 auto;padding:clamp(56px,10vw,120px) 24px clamp(40px,7vw,90px)}
.eyebrow{font-family:var(--mono);font-size:.78rem;letter-spacing:.18em;color:var(--ink-mut);margin-bottom:24px}
.hero__title{font-family:var(--display);font-weight:800;letter-spacing:-.035em;line-height:1.0;
  font-size:clamp(2.6rem,8.5vw,6rem);max-width:14ch}
.hero__title span{display:block}
.hero__accent{color:var(--acc);position:relative;width:max-content}
.hero__accent::after{content:"";position:absolute;left:0;bottom:.12em;width:100%;height:.09em;
  background:var(--acc);opacity:.35;border-radius:2px}
.hero__sub{color:var(--ink-mut);font-size:clamp(1.02rem,2.2vw,1.22rem);max-width:54ch;margin-top:28px}
.hero__sub em{font-style:normal;color:var(--ink);border-bottom:1px dashed var(--acc-deep);padding-bottom:1px}
.hero__cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:36px}
.hero__tags{list-style:none;display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}
.hero__tags li{font-family:var(--mono);font-size:.78rem;letter-spacing:.05em;color:var(--ink-mut);
  border:1px solid var(--line-soft);border-radius:999px;padding:.4em .9em}
.hero__tags li::before{content:"▸ ";color:var(--acc)}
.hero__terminal{margin-top:54px;max-width:560px;border:1px solid var(--line-soft);border-radius:var(--r);
  background:linear-gradient(180deg,var(--surface),var(--bg-2));overflow:hidden;
  box-shadow:0 30px 60px -30px rgba(0,0,0,.7)}
.term__bar{display:flex;align-items:center;gap:7px;padding:11px 14px;border-bottom:1px solid var(--line-soft)}
.term__bar i{width:11px;height:11px;border-radius:50%;background:#2a312d}
.term__bar i:first-child{background:var(--acc-deep)}
.term__bar span{font-family:var(--mono);font-size:.72rem;color:var(--ink-dim);margin-left:8px}
.term__body{font-family:var(--mono);font-size:.84rem;line-height:1.9;padding:16px 18px;color:var(--ink-mut);white-space:pre-wrap}
.c-acc{color:var(--acc)}.c-dim{color:var(--cool)}
.blink{animation:blink 1.1s steps(2) infinite}
@keyframes blink{0%,50%{opacity:1}50.01%,100%{opacity:0}}

/* ---------- cards (services) ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{position:relative;background:linear-gradient(180deg,var(--surface),var(--bg-2));
  border:1px solid var(--line-soft);border-radius:var(--r);padding:30px 26px 28px;
  transition:transform .35s var(--ease),border-color .35s,box-shadow .35s;overflow:hidden}
.card::before{content:"";position:absolute;inset:0;border-radius:var(--r);padding:1px;
  background:linear-gradient(135deg,var(--acc),transparent 40%);opacity:0;transition:opacity .35s;
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude}
.card:hover{transform:translateY(-6px);box-shadow:0 24px 50px -28px rgba(0,0,0,.8)}
.card:hover::before{opacity:1}
.card__no{font-family:var(--mono);font-size:.78rem;color:var(--acc);letter-spacing:.1em}
.card__ico{display:flex;align-items:center;justify-content:center;width:48px;height:48px;margin:14px 0 18px;
  border:1px solid var(--line);border-radius:12px;font-family:var(--mono);color:var(--acc);font-size:1.1rem;
  background:rgba(198,244,50,.05)}
.card h3{margin-bottom:12px}
.card p{color:var(--ink-mut);font-size:.97rem}
.chips{list-style:none;display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
.chips li{font-family:var(--mono);font-size:.7rem;letter-spacing:.04em;color:var(--ink-dim);
  border:1px solid var(--line-soft);border-radius:6px;padding:.32em .6em}

/* ---------- about ---------- */
.about{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(32px,6vw,80px);align-items:center}
.about h2{margin-top:6px}
.stats{list-style:none;display:flex;flex-direction:column;gap:2px;border-left:1px solid var(--line)}
.stats li{padding:18px 0 18px 26px;position:relative}
.stats li::before{content:"";position:absolute;left:-1px;top:50%;width:2px;height:0;background:var(--acc);transition:height .5s var(--ease)}
.stats li.in::before{height:60%;top:20%}
.stats strong{display:block;font-family:var(--display);font-weight:800;font-size:clamp(1.8rem,4vw,2.6rem);color:var(--ink);letter-spacing:-.02em}
.stats span{color:var(--ink-mut);font-size:.92rem}
.stats sup{color:var(--acc)}

/* ---------- work ---------- */
.work{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.proj{display:grid;grid-template-columns:120px 1fr;gap:22px;align-items:center;
  background:linear-gradient(180deg,var(--surface),var(--bg-2));border:1px solid var(--line-soft);
  border-radius:var(--r);padding:22px;transition:transform .35s var(--ease),border-color .35s}
.proj:hover{transform:translateY(-5px);border-color:var(--line)}
.proj__art{aspect-ratio:1;border-radius:11px;display:grid;place-items:center;
  font-family:var(--display);font-weight:800;font-size:2rem;color:#0a0c0b;position:relative;overflow:hidden}
.proj__art::after{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(0,0,0,.12) 1px,transparent 1px),linear-gradient(90deg,rgba(0,0,0,.12) 1px,transparent 1px);
  background-size:14px 14px}
.proj[data-accent="a"] .proj__art{background:linear-gradient(135deg,#c6f432,#5fae2e)}
.proj[data-accent="b"] .proj__art{background:linear-gradient(135deg,#5ee0c8,#2a8f7d)}
.proj[data-accent="c"] .proj__art{background:linear-gradient(135deg,#ffd166,#e8973a)}
.proj[data-accent="d"] .proj__art{background:linear-gradient(135deg,#9ad0ff,#4b7fd6)}
.proj__art span{position:relative;z-index:1}
.proj__body h3{margin-bottom:8px}
.proj__body p{color:var(--ink-mut);font-size:.95rem}

/* ---------- contact ---------- */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,6vw,72px)}
.contact__list{list-style:none;margin-top:34px;display:flex;flex-direction:column;gap:14px}
.contact__list li{display:flex;align-items:baseline;gap:16px;border-top:1px solid var(--line-soft);padding-top:14px}
.contact__list .mono{font-size:.72rem;letter-spacing:.14em;color:var(--acc);width:54px;flex:none}
.contact__list a:hover{color:var(--acc)}
.contact__form{display:flex;flex-direction:column;gap:16px;background:linear-gradient(180deg,var(--surface),var(--bg-2));
  border:1px solid var(--line-soft);border-radius:var(--r);padding:30px}
.contact__form label{display:flex;flex-direction:column;gap:8px;font-size:.82rem;color:var(--ink-mut);font-family:var(--mono);letter-spacing:.03em}
.contact__form input,.contact__form textarea{font-family:var(--kr);font-size:1rem;color:var(--ink);
  background:var(--bg);border:1px solid var(--line-soft);border-radius:10px;padding:13px 14px;transition:border-color .2s,box-shadow .2s;resize:vertical}
.contact__form input:focus,.contact__form textarea:focus{outline:none;border-color:var(--acc);box-shadow:0 0 0 3px rgba(198,244,50,.12)}
.contact__form input::placeholder,.contact__form textarea::placeholder{color:var(--ink-dim)}
.contact__form .btn{align-self:flex-start;margin-top:4px}
.form__note{font-family:var(--mono);font-size:.72rem;color:var(--ink-dim)}

/* ---------- footer ---------- */
.foot{max-width:var(--maxw);margin:0 auto;padding:48px 24px 72px;border-top:1px solid var(--line-soft)}
.foot__brand{font-family:var(--display);font-weight:800;font-size:1.05rem;display:flex;align-items:center;gap:.5em;margin-bottom:16px}
.foot__legal{color:var(--ink-mut);font-size:.88rem;line-height:1.9}
.foot__copy{color:var(--ink-dim);font-size:.8rem;margin-top:16px;font-family:var(--mono)}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease);transition-delay:var(--d,0s)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:880px){
  .nav__links,.nav__cta{display:none}
  .nav__toggle{display:flex}
  .cards{grid-template-columns:1fr}
  .work{grid-template-columns:1fr}
  .about,.contact{grid-template-columns:1fr}
  .stats{border-left:0;border-top:1px solid var(--line);flex-direction:row;flex-wrap:wrap}
  .stats li{padding:18px 22px 18px 0}.stats li::before{display:none}
}
@media (max-width:480px){
  .proj{grid-template-columns:80px 1fr;gap:16px}
  .hero__terminal{margin-top:38px}
}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .blink{animation:none}
  html{scroll-behavior:auto}
}