/* Heliocraft — spec-sheet aesthetic: cool steel paper, ink, one signal colour */
:root {
  --paper: #EEF0F3;
  --paper-2: #E4E7EC;
  --ink: #14161C;
  --steel: #5B6472;
  --line: #CDD2DA;
  --signal: #FF4F1A;
  --panel: #1C2330;
  --panel-ink: #C9D1DD;
  --panel-dim: #7D8899;
  --ok: #5FD38D;
  --measure: 68ch;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --sans: "Schibsted Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { text-decoration-color: var(--signal); }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 2px; }

.wrap { width: min(1180px, 100% - 2 * var(--gutter)); margin-inline: auto; }

/* ---------- top bar ---------- */
.top { border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; min-height: 4rem; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; font-weight: 700; font-size: 1.05rem; text-decoration: none; letter-spacing: -0.01em; }
.brand-mark { width: 1.6rem; height: 1.6rem; border-radius: 0.4rem; background: var(--ink); position: relative; flex: none; }
.brand-mark::after { content: ""; position: absolute; left: 25%; right: 25%; top: 43.75%; height: 12.5%; border-radius: 99px; background: var(--signal); }
.nav { display: flex; align-items: center; gap: 1.5rem; font-size: 0.95rem; }
.nav a { text-decoration: none; color: var(--steel); }
.nav a:hover { color: var(--ink); }
.nav .lang { border: 1px solid var(--line); border-radius: 99px; padding: 0.15rem 0.7rem; color: var(--ink); }
@media (max-width: 720px) { .nav .hide-sm { display: none; } }

/* ---------- hero ---------- */
.hero { padding-block: clamp(3rem, 8vw, 6rem) clamp(3rem, 6vw, 5rem); }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } }
.hero h1 {
  font-size: clamp(2.4rem, 5.2vw, 4.1rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 700;
  margin: 0 0 1.5rem;
  max-width: 15ch;
}
.hero .lede { font-size: 1.2rem; color: var(--steel); max-width: 44ch; margin: 0 0 2rem; }
.who { font-size: 0.98rem; margin: 0 0 1.25rem; color: var(--steel); }
.who strong { color: var(--ink); font-weight: 600; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.btn { display: inline-block; padding: 0.75rem 1.2rem; border-radius: 0.45rem; font-weight: 600; font-size: 0.98rem; text-decoration: none; border: 1px solid var(--ink); }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: #000; }
.btn-ghost:hover { background: var(--paper-2); }

/* ---------- run trace (the one memorable element) ---------- */
.trace {
  background: var(--panel);
  color: var(--panel-ink);
  border-radius: 0.75rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.55;
  overflow: hidden;
  box-shadow: 0 30px 60px -30px rgba(20, 22, 28, 0.55);
}
.trace-head { display: flex; justify-content: space-between; gap: 1rem; padding: 0.8rem 1.1rem; border-bottom: 1px solid rgba(255,255,255,0.08); color: var(--panel-dim); font-size: 0.76rem; }
.trace-head b { color: var(--panel-ink); font-weight: 500; }
.trace ol { list-style: none; margin: 0; padding: 0.9rem 1.1rem 1.1rem; }
.trace li { display: grid; grid-template-columns: 1.8rem 1fr auto; gap: 0.75rem; padding: 0.22rem 0; }
.trace .t { color: var(--panel-dim); }
.trace .ok { color: var(--ok); }
.trace .gate { color: var(--signal); }
.trace li.done { margin-top: 0.4rem; padding-top: 0.6rem; border-top: 1px dashed rgba(255,255,255,0.12); color: #fff; }
.trace-foot { padding: 0 1.1rem 1rem; color: var(--panel-dim); font-family: var(--sans); font-size: 0.8rem; }

@media (prefers-reduced-motion: no-preference) {
  .js .trace li { opacity: 0; transform: translateX(-4px); transition: opacity .35s ease, transform .35s ease; }
  .js .trace li.on { opacity: 1; transform: none; }
}

/* ---------- sections ---------- */
section.block { padding-block: clamp(3rem, 7vw, 5.5rem); border-top: 1px solid var(--line); }
.block h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); letter-spacing: -0.025em; line-height: 1.1; margin: 0 0 0.75rem; font-weight: 700; }
.block .intro { color: var(--steel); max-width: 56ch; margin: 0 0 2.5rem; font-size: 1.1rem; }

/* three practices: plain columns, no cards */
.practices { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1.5rem, 4vw, 3rem); }
@media (max-width: 860px) { .practices { grid-template-columns: 1fr; } }
.practice { border-top: 3px solid var(--ink); padding-top: 1.1rem; }
.practice h3 { font-size: 1.25rem; margin: 0 0 0.5rem; letter-spacing: -0.015em; }
.practice p { margin: 0 0 0.9rem; color: var(--steel); }
.practice ul { margin: 0; padding-left: 1.1rem; }
.practice li { margin: 0.2rem 0; }

/* projects: wide rows */
.projects { border-top: 1px solid var(--ink); }
.project { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) 11rem; gap: 2rem; align-items: start; padding: 1.75rem 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.project:hover .project-title { text-decoration: underline; text-decoration-color: var(--signal); text-underline-offset: 0.2em; }
@media (max-width: 860px) { .project { grid-template-columns: 1fr; gap: 0.75rem; } .status { justify-self: start; } }
.project-title { font-size: 1.45rem; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 0.35rem; }
.project-sum { color: var(--steel); margin: 0; max-width: 52ch; }
.fact { font-size: 0.95rem; }
.fact b { display: block; font-size: 1.9rem; letter-spacing: -0.03em; line-height: 1.05; font-weight: 700; }
.status { justify-self: end; font-size: 0.85rem; border: 1px solid var(--line); border-radius: 99px; padding: 0.2rem 0.7rem; white-space: nowrap; color: var(--steel); }
.status.live::before { content: ""; display: inline-block; width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--signal); margin-right: 0.45rem; vertical-align: 0.05em; }

/* career timeline: a genuine sequence */
.timeline { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--ink); }
.timeline li { position: relative; display: grid; grid-template-columns: 9.5rem minmax(0, 1fr); gap: 1.5rem; padding: 0 0 1.75rem 1.5rem; }
.timeline li::before { content: ""; position: absolute; left: -5px; top: 0.5rem; width: 9px; height: 9px; border-radius: 50%; background: var(--paper); border: 1px solid var(--ink); }
.timeline li:first-child::before { background: var(--signal); border-color: var(--signal); }
@media (max-width: 640px) { .timeline li { grid-template-columns: 1fr; gap: 0.2rem; } }
.when { color: var(--steel); font-size: 0.95rem; padding-top: 0.1rem; }
.timeline h3 { margin: 0; font-size: 1.1rem; }
.timeline p { margin: 0.2rem 0 0; color: var(--steel); max-width: 60ch; }

/* contact */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 3rem; align-items: end; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; gap: 1.5rem; } }
.contact-big { font-size: clamp(1.4rem, 3.4vw, 2.3rem); font-weight: 700; letter-spacing: -0.025em; word-break: break-word; }
.contact-list { list-style: none; margin: 0; padding: 0; }
.contact-list li { padding: 0.6rem 0; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; gap: 1rem; }
.contact-list span { color: var(--steel); }

footer { border-top: 1px solid var(--line); padding-block: 1.75rem; font-size: 0.88rem; color: var(--steel); }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }

/* ---------- case study pages ---------- */
.case-hero { padding-block: clamp(2.5rem, 6vw, 4.5rem) 2rem; }
.back { font-size: 0.95rem; color: var(--steel); text-decoration: none; }
.back:hover { color: var(--ink); }
.case-hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); letter-spacing: -0.035em; line-height: 1.04; margin: 1.25rem 0 1rem; max-width: 20ch; }
.case-hero .lede { font-size: 1.2rem; color: var(--steel); max-width: 58ch; margin: 0; }
.meta { display: flex; flex-wrap: wrap; gap: 2.5rem; margin-top: 2rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.meta div { font-size: 0.9rem; color: var(--steel); }
.meta b { display: block; color: var(--ink); font-size: 1rem; font-weight: 600; }
.case-body { display: grid; grid-template-columns: 13rem minmax(0, var(--measure)); gap: clamp(1.5rem, 5vw, 4rem); padding-block: 2.5rem 4rem; }
@media (max-width: 860px) { .case-body { grid-template-columns: 1fr; } .case-toc { display: none; } }
.case-toc { position: sticky; top: 1.5rem; align-self: start; font-size: 0.92rem; }
.case-toc a { display: block; padding: 0.25rem 0; color: var(--steel); text-decoration: none; }
.case-toc a:hover { color: var(--ink); }
.case-body h2 { font-size: 1.55rem; letter-spacing: -0.02em; margin: 2.75rem 0 0.75rem; scroll-margin-top: 1.5rem; }
.case-body h2:first-child { margin-top: 0; }
.case-body p, .case-body li { max-width: var(--measure); }
.case-body ul { padding-left: 1.2rem; }
.case-body li { margin: 0.35rem 0; }

/* architecture flow: an actual sequence */
.flow { list-style: none; margin: 1.5rem 0; padding: 0; counter-reset: step; }
.flow li { counter-increment: step; display: grid; grid-template-columns: 2.25rem minmax(0, 1fr); gap: 0.9rem; padding: 0.85rem 0; border-top: 1px solid var(--line); }
.flow li:last-child { border-bottom: 1px solid var(--line); }
.flow li::before { content: counter(step); font-weight: 700; font-size: 0.95rem; width: 1.9rem; height: 1.9rem; border-radius: 50%; border: 1px solid var(--ink); display: grid; place-items: center; }
.flow li.gate::before { background: var(--signal); border-color: var(--signal); color: #fff; }
.flow b { display: block; }
.flow span { color: var(--steel); font-size: 0.97rem; }
.stack { display: flex; flex-wrap: wrap; gap: 0.5rem; list-style: none; padding: 0 !important; }
.stack li { margin: 0 !important; border: 1px solid var(--line); background: var(--paper-2); border-radius: 0.35rem; padding: 0.2rem 0.6rem; font-size: 0.92rem; }
.note { border-left: 3px solid var(--signal); padding: 0.2rem 0 0.2rem 1rem; color: var(--steel); }
.next { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--ink); }
.next a { font-weight: 600; }

/* contact form */
.contact-grid { align-items: start; }
.contact-form { display: grid; gap: 1.1rem; background: #fff; border: 1px solid var(--line); border-radius: 0.75rem; padding: clamp(1.25rem, 3vw, 2rem); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 560px) { .field-row { grid-template-columns: 1fr; } }
.field { display: grid; gap: 0.35rem; font-size: 0.92rem; font-weight: 500; }
.field em { font-style: normal; font-weight: 400; color: var(--steel); }
.field input, .field textarea {
  font: inherit; font-size: 1rem; font-weight: 400; color: var(--ink);
  background: var(--paper); border: 1px solid var(--line); border-radius: 0.45rem;
  padding: 0.7rem 0.8rem; width: 100%; transition: border-color .15s ease, background .15s ease;
}
.field textarea { resize: vertical; min-height: 8rem; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--ink); background: #fff; box-shadow: 0 0 0 3px rgba(255, 79, 26, 0.18); }
.topics { border: 0; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.topics legend { font-size: 0.92rem; font-weight: 500; margin-bottom: 0.45rem; padding: 0; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.chip span { display: inline-block; border: 1px solid var(--line); border-radius: 99px; padding: 0.35rem 0.85rem; font-size: 0.92rem; background: var(--paper); }
.chip input:checked + span { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.chip input:focus-visible + span { outline: 2px solid var(--signal); outline-offset: 2px; }
.form-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }
.form-foot .btn { cursor: pointer; font: inherit; font-weight: 600; }
.form-foot .btn:disabled { opacity: .6; cursor: wait; }
.form-status { margin: 0; font-size: 0.95rem; }
.form-status.ok { color: #1E7A46; }
.form-status.err { color: #B4321A; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.contact-side { padding-top: 0.5rem; }
.contact-or { color: var(--steel); margin: 0 0 0.4rem; }
.contact-side .contact-big { font-size: clamp(1.15rem, 2.2vw, 1.45rem); display: inline-block; margin-bottom: 1.25rem; }