:root {
  --paper:   #f2f2ef;
  --ground:  #f7f7f4;
  --ink:     #111210;
  --ink-soft:#3d3f3b;
  --ink-faint:#7b7d77;
  --rule:    #12130f;
  --rule-soft:#d3d4ce;
  --accent:  #cf0f74;   /* signal magenta */
  --accent-2:#ad0c61;
  --panel:   #ffffff;

  --grot: "Helvetica Neue", Helvetica, system-ui, "Segoe UI", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --maxw: 1120px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper:#131412; --ground:#0d0e0c; --ink:#f0f1ed; --ink-soft:#b7b9b2;
    --ink-faint:#7f817a; --rule:#f0f1ed; --rule-soft:#26271f; --panel:#161713;
    --accent:#ff4da0; --accent-2:#ff70b4;
  }
}
:root[data-theme="light"] {
  --paper:#f2f2ef; --ground:#f7f7f4; --ink:#111210; --ink-soft:#3d3f3b;
  --ink-faint:#7b7d77; --rule:#12130f; --rule-soft:#d3d4ce; --panel:#ffffff;
  --accent:#cf0f74; --accent-2:#ad0c61;
}
:root[data-theme="dark"] {
  --paper:#131412; --ground:#0d0e0c; --ink:#f0f1ed; --ink-soft:#b7b9b2;
  --ink-faint:#7f817a; --rule:#f0f1ed; --rule-soft:#26271f; --panel:#161713;
  --accent:#ff4da0; --accent-2:#ff70b4;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 70px; }
body {
  margin: 0; background: var(--ground); color: var(--ink); font-family: var(--grot);
  font-size: clamp(15px, 0.9vw + 12px, 17px); line-height: 1.55; -webkit-font-smoothing: antialiased;
}
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(20px, 4vw, 44px); }
a { color: inherit; }
main { display: block; }

/* ---- top bar ---- */
.bar {
  border-bottom: 2px solid var(--rule); position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--ground) 90%, transparent); backdrop-filter: blur(8px);
}
.bar-in { display: flex; align-items: center; justify-content: space-between; height: 56px; gap: 0.8rem; }
.brand { font-family: var(--mono); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.02em; text-transform: uppercase; text-decoration: none; white-space: nowrap; }
.brand em { color: var(--accent); font-style: normal; }
.controls { display: flex; align-items: center; gap: clamp(0.7rem, 2vw, 1.4rem); }
nav.top { display: flex; gap: clamp(0.9rem, 2vw, 1.4rem); font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; }
nav.top a { text-decoration: none; color: var(--ink-soft); }
nav.top a:hover { color: var(--accent); }
.lang { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; text-decoration: none; color: var(--ink-soft); border: 1px solid var(--rule); padding: 0.3rem 0.5rem; }
.lang:hover { border-color: var(--accent); color: var(--accent); }
.theme-btn { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.12em; text-transform: uppercase; background: none; border: 1px solid var(--rule); color: var(--ink); padding: 0.3rem 0.55rem; cursor: pointer; }
.theme-btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (max-width: 680px) { nav.top { display: none; } }

.kicker { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }

/* ---- hero ---- */
.hero { padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(2.5rem, 5vw, 4rem); border-bottom: 2px solid var(--rule); }
.hero .kicker { margin: 0 0 1.6rem; }
.hero h1 {
  font-family: var(--grot); font-weight: 800; font-size: clamp(2.2rem, 6.6vw, 5rem);
  line-height: 0.95; letter-spacing: -0.03em; margin: 0 0 1.6rem; text-wrap: balance; max-width: 15ch;
}
.hero h1 mark { background: none; color: var(--accent); }
.hero .lede { font-size: clamp(1.02rem, 1.3vw, 1.2rem); color: var(--ink-soft); max-width: 52ch; margin: 0; }
.hero .cta { display: flex; flex-wrap: wrap; gap: 0; margin-top: 2.4rem; font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; }
.hero .cta a { text-decoration: none; padding: 0.7rem 1.2rem; border: 1px solid var(--rule); }
.hero .cta a.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.hero .cta a.primary:hover { background: var(--accent-2); border-color: var(--accent-2); }
.hero .cta a.ghost { color: var(--ink); border-left: 0; }
.hero .cta a.ghost:hover { color: var(--accent); }

/* ---- generic section ---- */
main > section { padding: clamp(2.8rem, 6vw, 4.5rem) 0; border-bottom: 2px solid var(--rule); }
.sec-head { display: flex; align-items: baseline; gap: 1rem; margin: 0 0 2.2rem; }
.sec-head .no { font-family: var(--mono); font-size: 0.8rem; color: var(--accent); font-weight: 700; }
.sec-head h2 { font-family: var(--grot); font-weight: 800; font-size: clamp(1.3rem, 2.6vw, 1.9rem); letter-spacing: -0.02em; margin: 0; text-transform: uppercase; }

/* ---- pillars ---- */
.grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--rule); }
.cell { padding: 1.4rem 1.2rem; border-right: 1px solid var(--rule); display: flex; flex-direction: column; gap: 0.6rem; }
.cell:last-child { border-right: 0; }
.cell .big { font-family: var(--grot); font-weight: 800; font-size: 2.6rem; line-height: 1; letter-spacing: -0.03em; color: var(--accent); }
.cell h3 { font-family: var(--grot); font-weight: 700; font-size: 1.02rem; letter-spacing: -0.01em; margin: 0; text-transform: uppercase; }
.cell p { margin: 0; color: var(--ink-soft); font-size: 0.88rem; line-height: 1.5; }
@media (max-width: 820px) { .grid4 { grid-template-columns: repeat(2, 1fr); } .cell:nth-child(2) { border-right: 0; } .cell:nth-child(1), .cell:nth-child(2) { border-bottom: 1px solid var(--rule); } }
@media (max-width: 520px) { .grid4 { grid-template-columns: 1fr; } .cell { border-right: 0; border-bottom: 1px solid var(--rule); } .cell:last-child { border-bottom: 0; } }

/* ---- how I work ---- */
#method .lede { max-width: 46rem; margin: -1rem 0 2rem; color: var(--ink-soft); font-size: 1rem; line-height: 1.6; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--rule); }
@media (max-width: 820px) { .grid3 { grid-template-columns: 1fr; } .grid3 .cell { border-right: 0; border-bottom: 1px solid var(--rule); } .grid3 .cell:last-child { border-bottom: 0; } }

/* ---- work rows ---- */
.rows { border-top: 1px solid var(--rule); }
.row { display: grid; grid-template-columns: 3rem 1.1fr 1.4fr 8rem; gap: 1.2rem; align-items: baseline; padding: 1.5rem 0; border-bottom: 1px solid var(--rule-soft); text-decoration: none; color: inherit; }
.row:hover { color: var(--accent); }
.row .idx { font-family: var(--mono); font-size: 0.82rem; color: var(--accent); font-weight: 700; }
.row h3 { font-family: var(--grot); font-weight: 700; font-size: 1.15rem; letter-spacing: -0.01em; margin: 0; }
.row p { margin: 0; color: var(--ink-soft); font-size: 0.9rem; }
.row:hover p { color: inherit; }
.row .tag { font-family: var(--mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-faint); text-align: right; }
@media (max-width: 760px) { .row { grid-template-columns: 2.2rem 1fr; } .row .desc-cell, .row .tag { grid-column: 2; } .row .tag { text-align: left; } }

/* ---- about ---- */
.about { display: grid; grid-template-columns: 1fr 1.4fr; gap: clamp(1.5rem, 4vw, 3.5rem); }
.portrait { display: block; width: 100%; max-width: 640px; height: auto; border: 2px solid var(--rule); background: #0d0e0c; margin: 0 0 2.8rem; }
.about .lbl { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); }
.about h2 { font-family: var(--grot); font-weight: 800; font-size: clamp(1.5rem, 3vw, 2.2rem); letter-spacing: -0.02em; margin: 0.6rem 0 0; text-transform: uppercase; text-wrap: balance; }
.about-body p { color: var(--ink-soft); max-width: 62ch; }
.about-body p.lead { color: var(--ink); font-size: 1.06rem; margin-top: 0; }
.about-body strong { color: var(--ink); }
.specs { list-style: none; margin: 1.5rem 0 0; padding: 0; }
.specs li { display: grid; grid-template-columns: 8rem 1fr; gap: 1rem; padding: 0.6rem 0; border-bottom: 1px solid var(--rule-soft); font-family: var(--mono); font-size: 0.8rem; }
.specs .k { color: var(--ink-faint); text-transform: uppercase; letter-spacing: 0.05em; }
@media (max-width: 760px) { .about { grid-template-columns: 1fr; } }

/* ---- contact ---- */
.contact { background: var(--ink); color: var(--ground); border-bottom: 0 !important; }
.contact .kicker { color: var(--accent); }
.contact h2 { font-family: var(--grot); font-weight: 800; font-size: clamp(1.8rem, 4vw, 3rem); letter-spacing: -0.02em; margin: 1rem 0; max-width: 15ch; text-transform: uppercase; text-wrap: balance; color: var(--ground); }
.contact p { color: color-mix(in srgb, var(--ground) 72%, transparent); max-width: 50ch; margin: 0 0 1.8rem; }
.contact .price { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; color: color-mix(in srgb, var(--ground) 78%, transparent); margin: 0 0 1.6rem; }
.contact a.mail { display: inline-block; font-family: var(--mono); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; background: var(--accent); color: #fff; text-decoration: none; padding: 0.85rem 1.3rem; }
.contact a.mail:hover { background: var(--accent-2); }
:root[data-theme="dark"] .contact { background: #000; }

/* ---- case study ---- */
.case { padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(3rem, 7vw, 5rem); }
.case-back { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-faint); text-decoration: none; display: inline-block; }
.case-back:hover { color: var(--accent); }
.case-back.foot { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--rule-soft); width: 100%; }
.case .kicker { margin: 1.8rem 0 0.9rem; }
.case h1 { font-family: var(--grot); font-weight: 800; font-size: clamp(1.9rem, 5vw, 3.3rem); line-height: 1.02; letter-spacing: -0.03em; margin: 0 0 1.4rem; text-wrap: balance; max-width: 20ch; }
.case-lead { font-size: clamp(1.05rem, 1.5vw, 1.28rem); color: var(--ink-soft); max-width: 60ch; margin: 0 0 2.5rem; padding-bottom: 2.5rem; border-bottom: 2px solid var(--rule); }
.case-blocks { display: grid; gap: 2rem; }
.case-block { display: grid; grid-template-columns: 12rem 1fr; gap: 1.5rem; align-items: start; }
.case-block h2 { font-family: var(--mono); font-weight: 700; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); margin: 0.2rem 0 0; }
.case-block p { margin: 0; color: var(--ink-soft); max-width: 62ch; }
.case-block strong { color: var(--ink); }
@media (max-width: 680px) { .case-block { grid-template-columns: 1fr; gap: 0.5rem; } }

/* ---- footer ---- */
footer { }
.foot-in { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; padding: 1.6rem 0; font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-faint); }
.foot-in a { color: var(--ink-faint); text-decoration: none; }
.foot-in a:hover { color: var(--accent); }

/* ---- case-study diagram ---- */
.diagram-fig { margin: 2.5rem 0 0.5rem; border: 2px solid var(--rule); background: var(--panel); }
.diagram-cap { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-faint); padding: 0.8rem 1rem; border-bottom: 1px solid var(--rule-soft); }
.diagram-cap b { color: var(--accent); font-weight: 700; }
.diagram-body { padding: 1.4rem; overflow-x: auto; }
.diagram-body svg { display: block; width: 100%; height: auto; min-width: 620px; }
.diagram-fig .box { fill: var(--panel); stroke: var(--ink); stroke-width: 1.5; }
.diagram-fig .box-accent { fill: none; stroke: var(--accent); stroke-width: 2; }
.diagram-fig .band { fill: none; stroke: var(--ink-faint); stroke-width: 1; stroke-dasharray: 3 3; }
.diagram-fig .t-title { fill: var(--ink); font-family: var(--grot); font-weight: 700; font-size: 15px; }
.diagram-fig .t-sub { fill: var(--ink-soft); font-family: var(--mono); font-size: 11px; }
.diagram-fig .t-tag { fill: var(--ink-faint); font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.04em; }
.diagram-fig .t-accent { fill: var(--accent); font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 0.06em; }
.diagram-fig .flow { stroke: var(--ink); stroke-width: 1.5; fill: none; }
.diagram-fig .flow-a { stroke: var(--accent); stroke-width: 2; fill: none; }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }