:root {
  --ink: #eef4f1;
  --muted: #9aaca8;
  --dim: #657774;
  --bg: #071016;
  --bg-raised: #0b171e;
  --panel: #0d1d25;
  --line: #203039;
  --line-bright: #344952;
  --cyan: #6ee7d2;
  --amber: #e6bd6b;
  --max: 1180px;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(110, 231, 210, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(110, 231, 210, .035) 1px, transparent 1px),
    var(--bg);
  background-size: 64px 64px;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; }

.shell { width: min(var(--max), calc(100% - 48px)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 100; left: 1rem; top: -5rem; padding: .7rem 1rem; color: var(--bg); background: var(--cyan); }
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid transparent;
  background: rgba(7, 16, 22, .82);
  backdrop-filter: blur(18px);
  transition: border-color .2s ease;
}

.site-header.scrolled { border-color: var(--line); }
.nav-wrap { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.wordmark { display: inline-flex; align-items: center; gap: .8rem; font-weight: 680; letter-spacing: -.015em; }
.wordmark-mark { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--cyan); color: var(--cyan); font: 700 .75rem var(--mono); }
.site-nav { display: flex; align-items: center; gap: 1.6rem; color: var(--muted); font-size: .9rem; }
.site-nav a:hover { color: var(--cyan); }
.site-nav .nav-contact { padding: .5rem .85rem; border: 1px solid var(--line-bright); color: var(--ink); }
.nav-toggle { display: none; border: 0; background: transparent; color: var(--ink); padding: .6rem; }
.nav-toggle span:not(.sr-only) { display: block; width: 24px; height: 1px; margin: 6px 0; background: currentColor; }

.hero { min-height: calc(100vh - 74px); display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(300px, .75fr); align-items: center; gap: clamp(3rem, 9vw, 9rem); padding-block: clamp(6rem, 14vh, 10rem); }
.eyebrow { margin: 0 0 1.4rem; color: var(--cyan); font: 650 .76rem/1.4 var(--mono); letter-spacing: .11em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 850px; margin-bottom: 1.6rem; font-size: clamp(3.15rem, 7.6vw, 7.4rem); line-height: .93; letter-spacing: -.065em; font-weight: 610; }
h1 em { color: var(--cyan); font-style: normal; }
.hero-lede { max-width: 690px; margin-bottom: 2.2rem; color: var(--muted); font-size: clamp(1.08rem, 1.6vw, 1.3rem); line-height: 1.65; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .65rem; min-height: 48px; padding: .7rem 1.1rem; border: 1px solid; font-weight: 670; font-size: .92rem; transition: transform .18s ease, color .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { border-color: var(--cyan); color: var(--bg); background: var(--cyan); }
.button-primary:hover { background: #91efdf; }
.button-secondary { border-color: var(--line-bright); color: var(--ink); background: rgba(11, 23, 30, .66); }
.button-secondary:hover { border-color: var(--cyan); color: var(--cyan); }

.hero-signal { border: 1px solid var(--line); padding: 1.25rem; background: rgba(11, 23, 30, .75); box-shadow: 18px 18px 0 rgba(110, 231, 210, .035); }
.signal-head { display: flex; justify-content: space-between; gap: 1rem; color: var(--muted); font: .72rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.status { color: var(--cyan); }
.status-dot { display: inline-block; width: 7px; height: 7px; margin-right: .45rem; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 5px rgba(110, 231, 210, .08); }
.signal-line { height: 72px; margin-block: 1.5rem; background: linear-gradient(160deg, transparent 0 20%, var(--line-bright) 20.5% 21%, transparent 21.5% 40%, var(--cyan) 40.5% 41.5%, transparent 42% 56%, var(--line-bright) 56.5% 57%, transparent 57.5%); opacity: .8; }
.hero-signal dl { margin: 0; }
.hero-signal dl div { display: grid; grid-template-columns: 42px 1fr; border-top: 1px solid var(--line); padding: .75rem 0; }
.hero-signal dt { color: var(--dim); font: .72rem var(--mono); }
.hero-signal dd { margin: 0; font-size: .9rem; }

.section { padding-block: clamp(5.5rem, 10vw, 9rem); border-top: 1px solid var(--line); background: rgba(7, 16, 22, .93); }
.section-work { background: rgba(8, 19, 25, .96); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); gap: clamp(2rem, 8vw, 8rem); align-items: end; margin-bottom: 3.2rem; }
h2 { max-width: 760px; margin-bottom: 0; font-size: clamp(2.3rem, 4.6vw, 4.7rem); line-height: 1.04; letter-spacing: -.048em; font-weight: 610; }
.section-heading > p, .section-intro { margin-bottom: 0; color: var(--muted); }

.project-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.project { min-height: 310px; display: flex; flex-direction: column; padding: clamp(1.5rem, 3.5vw, 2.6rem); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(13, 29, 37, .55); transition: background .2s ease, border-color .2s ease; }
.project:hover { background: rgba(16, 38, 47, .9); border-color: var(--line-bright); }
.project-featured { position: relative; overflow: hidden; }
.project-featured::after { content: ""; position: absolute; width: 190px; height: 190px; top: -110px; right: -90px; border: 1px solid rgba(110, 231, 210, .28); border-radius: 50%; box-shadow: 0 0 0 28px rgba(110, 231, 210, .025), 0 0 0 56px rgba(110, 231, 210, .018); pointer-events: none; }
.project-topline { display: flex; justify-content: space-between; gap: 1rem; margin-bottom: 3.2rem; color: var(--dim); font: .72rem var(--mono); letter-spacing: .07em; text-transform: uppercase; }
.language { display: inline-flex; align-items: center; gap: .45rem; }
.language i { display: inline-block; width: 7px; height: 7px; border-radius: 50%; }
.language .rust { background: var(--amber); }
.language .python { background: var(--cyan); }
.project h3 { margin-bottom: .85rem; font-size: clamp(1.45rem, 2.1vw, 2rem); line-height: 1.15; letter-spacing: -.025em; }
.project h3 a:hover { color: var(--cyan); }
.project h3 span { color: var(--cyan); font: .9rem var(--mono); }
.project > p { max-width: 540px; margin-bottom: 1.7rem; color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: .5rem; list-style: none; padding: 0; margin: auto 0 0; }
.tags li { padding: .28rem .52rem; border: 1px solid var(--line); color: #afbfbc; font: .68rem var(--mono); }
.text-link { display: inline-flex; gap: .65rem; margin-top: 2rem; color: var(--cyan); font: 650 .86rem var(--mono); }
.text-link:hover { color: #a4f5e8; }

.split { display: grid; grid-template-columns: minmax(0, .8fr) minmax(400px, 1.2fr); gap: clamp(3rem, 10vw, 10rem); }
.section-advisory { background: var(--cyan); color: var(--bg); }
.section-advisory .eyebrow { color: #173c3a; }
.section-advisory .advisory-copy > p { font-size: 1.12rem; }
.process { margin: 2.4rem 0; border-top: 1px solid rgba(7, 16, 22, .3); }
.process > div { display: grid; grid-template-columns: 42px 100px 1fr; gap: 1rem; align-items: baseline; padding: 1.15rem 0; border-bottom: 1px solid rgba(7, 16, 22, .3); }
.process span { font: .7rem var(--mono); opacity: .62; }
.process strong { font-size: .95rem; }
.process p { margin: 0; color: #254b49; }
.section-advisory .button-primary { border-color: var(--bg); background: var(--bg); color: var(--ink); }

.section-fiction { background: #0b171e; }
.books { border-top: 1px solid var(--line); }
.books article { display: grid; grid-template-columns: 160px 1fr 1.6fr; gap: 1.5rem; align-items: baseline; padding: 1.5rem 0; border-bottom: 1px solid var(--line); }
.book-type { color: var(--dim); font: .68rem var(--mono); text-transform: uppercase; letter-spacing: .06em; }
.books h3 { margin: 0; font-size: 1.25rem; }
.books p { margin: 0; color: var(--muted); }

.about-lede { font-size: clamp(1.35rem, 2.1vw, 1.8rem); line-height: 1.5; letter-spacing: -.02em; }
.section-about .split > div:last-child > p:not(.about-lede) { color: var(--muted); }
.focus-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin-block: 2.4rem; background: var(--line); border: 1px solid var(--line); }
.focus-grid div { padding: 1.25rem; background: var(--bg-raised); }
.focus-grid h3 { margin-bottom: .25rem; color: var(--cyan); font: .72rem var(--mono); text-transform: uppercase; letter-spacing: .07em; }
.focus-grid p { margin: 0; color: var(--muted); font-size: .9rem; }
.credentials { margin-block: 2.4rem; }
.credentials > div { display: grid; grid-template-columns: 65px 1fr; border-top: 1px solid var(--line); padding: 1rem 0; }
.credentials > div:last-child { border-bottom: 1px solid var(--line); }
.credentials span { color: var(--dim); font: .72rem var(--mono); }
.credentials p { margin: 0; color: var(--muted); }
.credentials strong { color: var(--ink); }

.section-contact { background: #0d1d25; }
.contact-panel { display: grid; grid-template-columns: minmax(0, .85fr) minmax(400px, 1.15fr); gap: clamp(3rem, 10vw, 10rem); }
.contact-panel > div:last-child > p { color: var(--muted); font-size: 1.1rem; }
.contact-links { border-top: 1px solid var(--line-bright); }
.contact-links a { display: grid; grid-template-columns: 110px 1fr 22px; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line-bright); }
.contact-links a:hover { color: var(--cyan); }
.contact-links span { color: var(--dim); font: .68rem var(--mono); text-transform: uppercase; }
.contact-links b { color: var(--cyan); font-family: var(--mono); }

footer { padding-block: 2rem; border-top: 1px solid var(--line); background: var(--bg); color: var(--dim); font-size: .82rem; }
.footer-wrap { display: flex; justify-content: space-between; gap: 2rem; }
.footer-wrap p { margin: 0; }
.footer-wrap a:hover { color: var(--cyan); }

@media (max-width: 880px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-signal { max-width: 520px; }
  .section-heading, .split, .contact-panel { grid-template-columns: 1fr; }
  .section-heading { align-items: start; }
  .books article { grid-template-columns: 130px 1fr; }
  .books p { grid-column: 2; }
}

@media (max-width: 720px) {
  .shell { width: min(var(--max), calc(100% - 30px)); }
  .nav-toggle { display: block; }
  .site-nav { position: absolute; inset: 74px 0 auto; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: .8rem 15px 1rem; border-bottom: 1px solid var(--line); background: var(--bg); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: .75rem 0; border-bottom: 1px solid var(--line); }
  .site-nav .nav-contact { border: 0; border-bottom: 1px solid var(--line); padding: .75rem 0; }
  h1 { font-size: clamp(3rem, 15vw, 5rem); }
  .project-grid { grid-template-columns: 1fr; }
  .project { min-height: 285px; }
  .process > div { grid-template-columns: 36px 1fr; }
  .process p { grid-column: 2; }
  .books article { grid-template-columns: 1fr; gap: .45rem; }
  .books p { grid-column: auto; }
  .contact-links a { grid-template-columns: 88px 1fr 18px; overflow-wrap: anywhere; }
}

@media (max-width: 440px) {
  .wordmark > span:last-child { display: none; }
  .hero-actions .button { width: 100%; }
  .focus-grid { grid-template-columns: 1fr; }
  .footer-wrap { flex-direction: column; gap: .7rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}