/* syshate.com — design system per DESIGN.md
   Mood: "night shift, main stage" — electric violet on true black, acid lime signals. */

:root {
  --bg: oklch(0.10 0 0);
  --surface: oklch(0.155 0.012 285);
  --surface-2: oklch(0.20 0.02 285);
  --ink: oklch(0.965 0.005 285);
  --muted: oklch(0.74 0.02 285);
  --primary: oklch(0.58 0.21 285);
  --primary-hot: oklch(0.71 0.19 290);
  --primary-deep: oklch(0.42 0.19 285);
  --accent: oklch(0.87 0.19 135);
  --line: oklch(0.30 0.02 285);

  --font-display: 'Unbounded', 'Arial Black', sans-serif;
  --font-body: 'Golos Text', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);

  --w-content: 1200px;
  --pad-x: clamp(1.25rem, 4vw, 3rem);
  --sec-gap: clamp(6rem, 14vh, 10rem);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; overflow-x: hidden; overflow-x: clip; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  overflow-x: clip;
}

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

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

a { color: inherit; }

.skip {
  position: absolute; left: 1rem; top: -4rem;
  background: var(--accent); color: var(--bg);
  padding: 0.6rem 1rem; border-radius: 8px;
  font-family: var(--font-mono); font-size: 0.85rem;
  z-index: 100; transition: top 200ms var(--ease-out);
}
.skip:focus-visible { top: 1rem; }

/* ---------- header ---------- */

.site-head {
  display: flex; align-items: center; gap: clamp(1rem, 3vw, 2.5rem);
  max-width: var(--w-content); margin-inline: auto;
  padding: 1.5rem var(--pad-x) 0;
}

.brand {
  font-family: var(--font-display); font-weight: 800; font-size: 1.15rem;
  text-decoration: none; letter-spacing: 0.02em;
}
.brand-dot { color: var(--primary-hot); }

.site-nav { display: flex; flex-wrap: wrap; gap: clamp(0.75rem, 2vw, 1.75rem); margin-inline: auto; }
.site-nav a {
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--muted);
  text-decoration: none; position: relative; padding-block: 0.25rem;
}
.site-nav a::after {
  content: ''; position: absolute; left: 0; bottom: 0; height: 1px; width: 100%;
  background: var(--primary-hot); transform: scaleX(0); transform-origin: left;
  transition: transform 200ms var(--ease-out);
}
.site-nav a:hover { color: var(--ink); }
.site-nav a:hover::after { transform: scaleX(1); }

.lang { display: flex; gap: 0.75rem; }
.lang-link {
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--muted);
  text-decoration: none; padding-block: 0.25rem;
}
.lang-link:hover { color: var(--ink); }
.lang-link.is-active { color: var(--accent); }

/* ---------- hero ---------- */

.hero {
  position: relative;
  max-width: var(--w-content); margin-inline: auto;
  padding: clamp(4.5rem, 12vh, 8rem) var(--pad-x) clamp(4rem, 10vh, 6rem);
}
.hero::before {
  content: ''; position: absolute; inset: -20% -10% auto auto;
  width: min(60vw, 700px); aspect-ratio: 1;
  background: radial-gradient(circle, oklch(0.42 0.19 285 / 0.5), transparent 65%);
  pointer-events: none;
}

.status {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent);
  margin: 0 0 2.5rem;
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  animation: pulse 2s var(--ease-in-out) infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 oklch(0.87 0.19 135 / 0.5); }
  50% { box-shadow: 0 0 0 7px oklch(0.87 0.19 135 / 0); }
}

.hero-name { font-family: var(--font-mono); font-size: 0.9rem; color: var(--muted); margin: 0 0 1rem; }

.display {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(2.1rem, 6.4vw, 4.7rem);
  line-height: 1.08; letter-spacing: -0.02em;
  text-transform: uppercase; text-wrap: balance;
  margin: 0 0 2rem; position: relative;
}
.display-l1 { display: block; }
.display-l2 { display: block; color: var(--primary-hot); }

.hero-sub { max-width: 56ch; font-size: 1.125rem; color: var(--muted); margin: 0 0 4rem; }
.hero-sub strong { color: var(--ink); }

.metrics {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
  gap: 2rem 2.5rem; margin: 0;
}
.metric { border-top: 1px solid var(--line); padding-top: 1.1rem; }
.metric-n {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(1.8rem, 3.4vw, 2.7rem); line-height: 1.1;
  margin: 0 0 0.4rem;
}
.metric-label { font-size: 0.9rem; color: var(--muted); margin: 0; }
.metrics .metric { display: flex; flex-direction: column; }
.metric-n { order: -1; }

/* ---------- marquee ---------- */

.marquee {
  overflow: hidden; border-block: 1px solid var(--line);
  padding-block: 1.1rem; user-select: none;
}
.marquee-track { display: flex; width: max-content; animation: marquee 45s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-group { display: flex; align-items: center; gap: 2.5rem; padding-right: 2.5rem; }
.marquee-item {
  font-family: var(--font-mono); font-size: 0.95rem; text-transform: uppercase;
  letter-spacing: 0.12em; color: var(--muted); white-space: nowrap;
}
.marquee-sep { color: var(--primary-hot); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- sections ---------- */

.section { max-width: var(--w-content); margin-inline: auto; padding: var(--sec-gap) var(--pad-x) 0; }

.sec-title {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(1.7rem, 4vw, 2.8rem); text-transform: uppercase;
  letter-spacing: -0.01em; margin: 0 0 1rem;
}
.sec-sub { color: var(--muted); max-width: 52ch; margin: 0 0 3rem; }

/* career */

.cases { display: grid; gap: clamp(2.5rem, 6vh, 4rem); margin-top: 3rem; }
.case {
  display: grid; grid-template-columns: minmax(140px, 190px) 1fr;
  gap: 1rem 3rem; align-items: start;
}
.case-years { font-family: var(--font-mono); font-size: 0.9rem; color: var(--primary-hot); margin: 0.35rem 0 0; }
.case-title {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(1.2rem, 2.4vw, 1.6rem); margin: 0 0 0.35rem; text-wrap: balance;
}
.case-org { font-family: var(--font-mono); font-size: 0.85rem; color: var(--muted); margin: 0 0 1rem; }
.case-text { max-width: 68ch; margin: 0; text-wrap: pretty; }

.timeline { margin-top: clamp(3.5rem, 8vh, 5rem); }
.timeline-title { font-family: var(--font-mono); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); margin: 0 0 1.5rem; }
.timeline-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.25rem; }
.timeline-item {
  display: grid; grid-template-columns: minmax(140px, 190px) 1fr;
  gap: 0.2rem 3rem; border-top: 1px solid var(--line); padding-top: 1.25rem;
}
.tl-years { font-family: var(--font-mono); font-size: 0.85rem; color: var(--muted); }
.tl-role { font-weight: 600; }
.tl-note { grid-column: 2; color: var(--muted); font-size: 0.95rem; }

/* projects */

.features { display: grid; gap: 1.5rem; margin-top: 3rem; }

.feature { border-radius: 20px; padding: clamp(1.75rem, 4vw, 3rem); }

.feature--drench { background: var(--primary); }
.feature--drench .feature-text { color: oklch(0.93 0.02 290); }
.feature--drench .feature-tag { border-color: oklch(0.93 0.02 290 / 0.4); color: oklch(0.96 0.01 290); }
.feature--drench .feature-link { color: var(--ink); }

.feature--glow {
  background: var(--surface); border: 1px solid var(--line);
  box-shadow: 0 0 90px oklch(0.42 0.19 285 / 0.28);
}
.feature--glow .feature-link { color: var(--primary-hot); }

.feature--line { border: 1px solid var(--line); background: transparent; transition: border-color 250ms var(--ease-out); }
.feature--line:hover { border-color: var(--primary); }
.feature--line .feature-link { color: var(--primary-hot); }

.feature--infra { border: 1px solid var(--line); background: transparent; }
.feature--infra .feature-name { font-size: clamp(1.15rem, 2vw, 1.4rem); }
.feature--infra .feature-link { color: var(--muted); }

.feature-head { display: flex; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.feature-name {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(1.6rem, 3.6vw, 2.4rem); margin: 0; text-transform: uppercase;
}
.feature-tag {
  font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.1em; border: 1px solid var(--line); border-radius: 999px;
  padding: 0.3rem 0.75rem; color: var(--muted); white-space: nowrap;
}
.feature-text { max-width: 60ch; margin: 0 0 1.5rem; }
.feature-chips { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0 0 1.75rem; padding: 0; }
.feature-chips li {
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 0.32rem 0.8rem;
}
.feature--drench .feature-chips li { border-color: oklch(0.93 0.02 290 / 0.35); color: oklch(0.95 0.015 290); }
.feature-link {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.95rem; text-decoration: none;
}
.feature-link:not(.is-static):hover .arrow { transform: translateX(4px); }
.feature-link .arrow { transition: transform 200ms var(--ease-out); }
a.feature-link { text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 1px; }

/* skills */

.skill-groups {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2.5rem 3rem; margin-top: 3rem;
}
.skill-group { border-top: 1px solid var(--line); padding-top: 1.25rem; }
.skill-name { font-family: var(--font-display); font-weight: 500; font-size: 0.95rem; margin: 0 0 0.9rem; }
.skill-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; }
.skill-list li { color: var(--muted); font-size: 0.95rem; }
.skill-list--langs { flex-direction: column; }
.skill-list--langs li { color: var(--ink); }
.lvl { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent); margin-left: 0.4rem; }
.skills-note { font-family: var(--font-mono); font-size: 0.85rem; color: var(--muted); margin: 3rem 0 0; }
.skills-note a { color: var(--primary-hot); text-underline-offset: 4px; }

/* contact */

.contact {
  max-width: var(--w-content); margin-inline: auto;
  padding: var(--sec-gap) var(--pad-x);
  text-align: left;
}
.contact-title {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(2.4rem, 7vw, 5rem); text-transform: uppercase;
  letter-spacing: -0.02em; margin: 0 0 1.25rem;
}
.contact-text { color: var(--muted); max-width: 50ch; margin: 0 0 2.5rem; }

.btn {
  display: inline-flex; align-items: center; gap: 0.65rem;
  background: var(--primary); color: var(--ink); text-decoration: none;
  font-family: var(--font-display); font-weight: 500; font-size: 0.95rem;
  padding: 1.05rem 1.9rem; border-radius: 999px;
  transition: transform 160ms var(--ease-out), background 200ms var(--ease-out), box-shadow 200ms var(--ease-out);
}
.btn:hover { background: var(--primary-hot); box-shadow: 0 0 45px oklch(0.58 0.21 285 / 0.5); }
.btn:active { transform: scale(0.97); }
.btn .arrow { font-family: var(--font-body); }

/* footer */

.site-foot {
  max-width: var(--w-content); margin-inline: auto;
  padding: 2rem var(--pad-x) 2.5rem;
  border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: 0.5rem 2rem; align-items: baseline;
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--muted);
}
.site-foot p { margin: 0; }
.foot-note { margin-right: auto; }

/* ---------- motion ---------- */

/* hero load choreography */
@keyframes rise { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: none; } }
.js .hero .anim { animation: rise 600ms var(--ease-out) both; }
.js .hero .a1 { animation-delay: 60ms; }
.js .hero .a2 { animation-delay: 140ms; }
.js .hero .a3 { animation-delay: 220ms; }
.js .hero .a4 { animation-delay: 340ms; }
.js .hero .a5 { animation-delay: 460ms; }

/* scroll reveals — content is visible by default; .js pre-hides, observer restores */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity 500ms var(--ease-out), transform 500ms var(--ease-out); }
.js .reveal.in { opacity: 1; transform: none; }
.js .reveal.in .reveal { transition-delay: 60ms; }

@media (prefers-reduced-motion: reduce) {
  .status-dot { animation: none; }
  .marquee-track { animation: none; }
  .js .hero .anim { animation-duration: 1ms; animation-delay: 0ms; }
  .js .reveal { transform: none; transition: opacity 200ms ease; }
  .site-nav a::after { transition: none; }
  .btn, .feature-link .arrow { transition: none; }
}

/* ---------- responsive ---------- */

@media (max-width: 720px) {
  .case, .timeline-item { grid-template-columns: 1fr; }
  .tl-note { grid-column: 1; }
  .case-years { margin-top: 0; }
  .site-head { flex-wrap: wrap; }
  .site-nav { order: 3; width: 100%; margin-top: 0.75rem; }
  .hero-sub { margin-bottom: 3rem; }
}

@media (max-width: 420px) {
  .display { font-size: clamp(1.8rem, 8.5vw, 2.4rem); }
}