:root {
  --paper: #f3f1ea;
  --card: #faf8f3;
  --ink: #141518;
  --muted: #5d5f66;
  --line: #d9d5ca;
  --accent: #cf4310;
  --accent-soft: rgba(207, 67, 16, 0.08);
  --trace-bg: #17181b;
  --trace-ink: #e9e6dc;
  --serif: "Literata", Georgia, serif;
  --sans: "Golos Text", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  color-scheme: light;
}
:root[data-track="ml"] { --accent: #1d6b55; --accent-soft: rgba(29, 107, 85, 0.09); }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #111214; --card: #18191c; --ink: #ebe8e0; --muted: #9a9ca3; --line: #2b2d31;
    --accent: #ff7a45; --accent-soft: rgba(255, 122, 69, 0.1); --trace-bg: #0b0c0d; color-scheme: dark;
  }
  :root:not([data-theme="light"])[data-track="ml"] { --accent: #53c39c; --accent-soft: rgba(83, 195, 156, 0.1); }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 17px/1.6 var(--sans); -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(var(--line) 0.6px, transparent 0.6px);
  background-size: 22px 22px; background-attachment: fixed;
}
a { color: inherit; }
.mono { font-family: var(--mono); letter-spacing: -0.01em; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 28px; }

/* header */
.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; gap: 24px; height: 64px; }
.mark { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 600; white-space: nowrap; }
.mark .mono { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 8px;
  background: var(--ink); color: var(--paper); font-size: 13px; font-weight: 500; }
.nav { display: flex; gap: 22px; margin-left: auto; font-size: 15px; }
.nav a { text-decoration: none; color: var(--muted); }
.nav a:hover { color: var(--ink); }
.switches { display: flex; gap: 10px; }
.seg { display: flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; background: var(--card); }
.seg a { font: 500 13px/1 var(--mono); padding: 8px 12px; border-radius: 999px; text-decoration: none; color: var(--muted);
  white-space: nowrap; transition: background .2s, color .2s; }
.seg a:hover { color: var(--ink); }
.seg a.on { background: var(--ink); color: var(--paper); }
.seg-track a.on { background: var(--accent); color: #fff; }

/* hero */
.hero { display: grid; grid-template-columns: 1.35fr 1fr; gap: 56px; align-items: center; padding-top: 72px; padding-bottom: 56px; }
.kicker { color: var(--accent); font-size: 13px; text-transform: uppercase; letter-spacing: .08em; margin: 0 0 18px; }
h1 { font: 500 clamp(34px, 4.6vw, 58px)/1.08 var(--serif); letter-spacing: -0.02em; margin: 0 0 22px; }
.lead { font-size: 18.5px; color: var(--muted); max-width: 640px; margin: 0 0 28px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 22px; }
.btn { display: inline-flex; align-items: center; padding: 13px 20px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--card); text-decoration: none; font-weight: 500; font-size: 15.5px; transition: transform .15s, border-color .15s; }
.btn:hover { transform: translateY(-1px); border-color: var(--ink); }
.btn-main { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.meta { font-size: 13px; color: var(--muted); margin: 0; }

.trace { margin: 0; background: var(--trace-bg); color: var(--trace-ink); border-radius: 14px; padding: 16px 0 18px;
  box-shadow: 0 30px 60px -30px rgba(0,0,0,.45), 0 0 0 1px rgba(255,255,255,.04) inset; transform: rotate(1.2deg); }
.trace figcaption { display: flex; gap: 6px; align-items: center; padding: 0 18px 12px; font-size: 12px; color: #8b8d93;
  border-bottom: 1px solid rgba(255,255,255,.07); }
.trace .dot { width: 9px; height: 9px; border-radius: 50%; background: #3a3c41; }
.trace figcaption .dot:last-of-type { margin-right: 8px; }
.trace ol { list-style: none; margin: 12px 0 0; padding: 0; font-size: 13.5px; }
.trace li { display: grid; grid-template-columns: 34px auto 1fr; gap: 12px; padding: 5px 18px;
  opacity: 0; animation: row .45s ease forwards; animation-delay: calc(var(--i) * 170ms + 250ms); }
.trace .ln { color: #55585f; text-align: right; }
.trace .fn { color: var(--accent); }
.trace .arg { color: #c9c6bc; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.trace .blink { animation: blink 1s steps(1) infinite; color: var(--accent); }
@keyframes row { from { opacity: 0; transform: translateX(-6px); } to { opacity: 1; transform: none; } }
@keyframes blink { 50% { opacity: 0; } }

/* stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); }
.stat { padding: 26px 22px 26px 0; }
.stat + .stat { padding-left: 22px; border-left: 1px solid var(--line); }
.stat-n { font: 500 clamp(30px, 3.4vw, 44px)/1 var(--serif); color: var(--accent); margin-bottom: 10px; }
.stat-l { font-size: 14.5px; color: var(--muted); line-height: 1.45; }
.note { font-size: 12.5px; color: var(--muted); margin: 10px 0 0; }

/* blocks */
.block { padding-top: 88px; }
.h2 { font: 500 clamp(26px, 2.8vw, 36px)/1.15 var(--serif); letter-spacing: -0.015em; margin: 0 0 30px;
  display: flex; align-items: baseline; gap: 16px; }
.h2::after { content: ""; flex: 1; height: 1px; background: var(--line); transform: translateY(-6px); }
.hint { color: var(--muted); margin: -16px 0 16px; font-size: 15px; }

.prs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.pr { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px; }
.pr-n { font-size: 12px; color: var(--accent); }
.pr h4 { font: 600 17px/1.3 var(--sans); margin: 10px 0 8px; }
.pr p { margin: 0; font-size: 15px; color: var(--muted); line-height: 1.55; }

/* matrix */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.chip, .fbtn { font-size: 12.5px; cursor: pointer; border: 1px solid var(--line); background: var(--card); color: var(--ink);
  border-radius: 999px; padding: 7px 12px; transition: all .15s; }
.chip:hover, .fbtn:hover { border-color: var(--accent); }
.chip.on, .fbtn.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.matrix-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; background: var(--card); }
.matrix { border-collapse: collapse; width: 100%; min-width: 860px; font-size: 14.5px; }
.matrix th, .matrix td { border-bottom: 1px solid var(--line); padding: 10px 6px; }
.matrix thead th { position: sticky; top: 0; background: var(--card); vertical-align: bottom; }
.matrix thead .fbtn { padding: 5px 9px; font-size: 11.5px; white-space: nowrap; }
.matrix tbody th { text-align: left; font-weight: 500; min-width: 230px; padding-left: 16px; line-height: 1.35; }
.matrix tbody th a { text-decoration: none; }
.matrix tbody th a:hover { color: var(--accent); }
.matrix td { text-align: center; color: var(--accent); font-size: 16px; }
.matrix td.c1 { opacity: .55; }
.matrix tr:last-child > * { border-bottom: 0; }
.matrix tbody tr { transition: opacity .2s; }
.matrix tbody tr.dim { opacity: .25; }

/* featured cases */
.case { display: grid; grid-template-columns: 300px 1fr; gap: 40px; padding: 40px 0; border-top: 1px solid var(--line); }
.case:first-of-type { border-top: 0; padding-top: 4px; }
.case-head { position: sticky; top: 96px; align-self: start; }
.case-num { font: 400 88px/0.9 var(--serif); color: transparent; -webkit-text-stroke: 1.2px var(--accent); display: block; margin-bottom: 14px; }
.case-client { font-size: 12.5px; color: var(--muted); margin: 0 0 8px; text-transform: uppercase; letter-spacing: .04em; }
.case h3 { font: 500 26px/1.2 var(--serif); margin: 0; letter-spacing: -0.01em; }
h5 { font-size: 11.5px; font-weight: 500; text-transform: uppercase; letter-spacing: .1em; color: var(--accent); margin: 0 0 10px; }
.case-problem p { margin: 0 0 26px; font-size: 17px; }
.case-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-bottom: 24px; }
.case ul { margin: 0; padding: 0; list-style: none; }
.case li { position: relative; padding-left: 18px; margin-bottom: 10px; font-size: 15.5px; line-height: 1.55; }
.case li::before { content: ""; position: absolute; left: 0; top: .72em; width: 7px; height: 1.5px; background: var(--accent); }
.case-result { background: var(--accent-soft); border-left: 3px solid var(--accent); border-radius: 0 10px 10px 0; padding: 16px 20px; margin-bottom: 18px; }
.case-result p { margin: 0; font-weight: 500; }
.stackline { font-size: 12.5px; color: var(--muted); margin: 0; line-height: 1.7; }
.case.hide, .card.hide { display: none; }

/* cards */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 24px; display: flex; flex-direction: column;
  transition: border-color .2s, transform .2s; }
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card h4 { font: 500 20px/1.25 var(--serif); margin: 0 0 10px; }
.card p { margin: 0 0 14px; font-size: 15.5px; color: var(--muted); }
.card .stackline { margin-top: auto; }

/* timeline */
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li { display: grid; grid-template-columns: 210px 1fr; gap: 28px; padding: 20px 0; border-top: 1px solid var(--line); }
.period { font-size: 13.5px; color: var(--muted); padding-top: 4px; }
.timeline h4 { font: 500 22px/1.2 var(--serif); margin: 0 0 6px; }
.timeline .role { color: var(--accent); font-family: var(--sans); font-size: 16px; font-weight: 500; }
.timeline p { margin: 0; color: var(--muted); }

/* skills */
.skills { margin: 0; }
.sk { display: grid; grid-template-columns: 210px 1fr; gap: 28px; padding: 14px 0; border-top: 1px solid var(--line); }
.sk dt { font-size: 13px; color: var(--accent); text-transform: uppercase; letter-spacing: .06em; padding-top: 3px; }
.sk dd { margin: 0; }

/* contact */
.contact { padding-top: 110px; padding-bottom: 40px; }
.contact h2 { font: 500 clamp(40px, 6vw, 76px)/1 var(--serif); letter-spacing: -0.025em; margin: 0 0 18px; }
.foot { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 28px; padding-bottom: 40px;
  border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.foot a { color: var(--accent); text-decoration: none; }


/* about / process */
.section-lead { color: var(--muted); max-width: 760px; margin: -8px 0 30px; font-size: 16.5px; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 0; border: 1px solid var(--line); border-radius: 14px; background: var(--card); overflow: hidden; counter-reset: s; }
.steps li { display: flex; flex-direction: column; gap: 10px; padding: 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  position: relative; }
.st-n { font: 400 34px/1 var(--serif); color: transparent; -webkit-text-stroke: 1px var(--accent); }
.steps h4 { font: 600 17px/1.3 var(--sans); margin: 0 0 6px; }
.steps p { margin: 0; font-size: 14.5px; color: var(--muted); line-height: 1.55; }
.steps .st-art { margin-top: 10px; font-size: 12px; color: var(--accent); }
.steps li:hover { background: var(--accent-soft); }
.steps { grid-template-columns: repeat(4, 1fr); }
.steps li:last-child { grid-column: span 2; }

/* cases extras */
.filter { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin: -8px 0 26px; }
.filter .hint { margin: 0; }
.filter .chips { margin: 0; }
.h3 { font: 500 24px/1.2 var(--serif); margin: 48px 0 20px; }
.case-part { border: 1px dashed var(--accent); border-radius: 10px; padding: 14px 18px; margin: -6px 0 24px; }
.case-part p { margin: 0; font-size: 15.5px; }
.case-shows { margin: 0 0 14px; font-size: 15.5px; }
.case-shows .mono { color: var(--accent); font-size: 12.5px; text-transform: uppercase; letter-spacing: .06em; margin-right: 4px; }
.matrix-box { margin-top: 30px; }
.matrix-box summary { cursor: pointer; font-size: 13px; color: var(--muted); padding: 10px 0; list-style: none; }
.matrix-box summary::before { content: "+ "; color: var(--accent); }
.matrix-box[open] summary::before { content: "− "; }
.matrix thead th { font-size: 11.5px; font-weight: 500; color: var(--muted); white-space: nowrap; }

/* stack tags */
.tags { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 8px; }
.tags li { font-size: 14px; padding: 4px 10px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); }

/* reveal */
@media (prefers-reduced-motion: no-preference) {
  .hero-text > * { animation: rise .7s cubic-bezier(.2,.7,.2,1) both; }
  .hero-text > :nth-child(2) { animation-delay: .08s; }
  .hero-text > :nth-child(3) { animation-delay: .16s; }
  .hero-text > :nth-child(4) { animation-delay: .24s; }
  .hero-text > :nth-child(5) { animation-delay: .32s; }
}
@media (prefers-reduced-motion: reduce) { .trace li { animation: none; opacity: 1; } }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

/* responsive */
@media (max-width: 1020px) {
  .nav { display: none; }
  .switches { margin-left: auto; }
  .hero { grid-template-columns: 1fr; gap: 36px; padding-top: 44px; }
  .trace { transform: none; }
  .prs { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .case { grid-template-columns: 1fr; gap: 18px; }
  .case-head { position: static; display: flex; gap: 18px; align-items: flex-end; }
  .case-num { font-size: 64px; margin: 0; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .top-in { height: auto; padding: 10px 16px; flex-wrap: wrap; gap: 10px; }
  .mark-name { display: none; }
  .seg a { padding: 7px 10px; font-size: 12px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(3) { padding-left: 0; border-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line); }
  .prs, .grid2, .case-cols, .steps { grid-template-columns: 1fr; }
  .steps li:last-child { grid-column: auto; }
  .timeline li, .sk { grid-template-columns: 1fr; gap: 6px; }
  .block { padding-top: 64px; }
  .hero { padding-top: 32px; padding-bottom: 40px; }
  .contact { padding-top: 80px; }
  .foot { padding-bottom: 32px; }
  .trace li { grid-template-columns: 26px auto 1fr; gap: 8px; padding: 5px 12px; font-size: 12.5px; }
}