/* ---------- Tokens ---------- */
:root {
  --paper: #f4efe6;
  --paper-2: #ebe4d6;
  --ink: #1d2321;
  --ink-soft: #4a524f;
  --line: #d6cdbb;
  --accent: #1f6f5c;       /* chawl-wall green */
  --accent-ink: #f4efe6;
  --warm: #c8553d;         /* terracotta */
  --lit: #f2b544;          /* lamp-lit window */

  --serif: "Instrument Serif", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --wrap: 1160px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 14px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #151918;
    --paper-2: #1c2120;
    --ink: #ece6da;
    --ink-soft: #a7aea9;
    --line: #2e3533;
    --accent: #5fbf9f;
    --accent-ink: #0f1312;
    --warm: #e27a62;
    --lit: #f2b544;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #151918;
  --paper-2: #1c2120;
  --ink: #ece6da;
  --ink-soft: #a7aea9;
  --line: #2e3533;
  --accent: #5fbf9f;
  --accent-ink: #0f1312;
  --warm: #e27a62;
  --lit: #f2b544;
  color-scheme: dark;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3 { margin: 0; font-weight: 400; }
p { margin: 0; }
a { color: inherit; }
em { font-style: italic; color: var(--accent); }
.mono { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.02em; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 100; background: var(--ink); color: var(--paper); padding: 8px 12px; border-radius: 6px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 18px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--ink); color: var(--paper);
  text-decoration: none; font-weight: 500;
  padding: 14px 22px; border-radius: 999px;
  transition: transform .15s ease, background .15s ease;
}
.btn:hover { background: var(--accent); color: var(--accent-ink); transform: translateY(-1px); }
.btn-small { padding: 9px 16px; font-size: 0.9rem; }
.btn-large { padding: 18px 30px; font-size: 1.15rem; }

.link-arrow { text-decoration: none; font-weight: 500; border-bottom: 1px solid var(--line); padding-bottom: 2px; }
.link-arrow span { display: inline-block; transition: transform .15s ease; }
.link-arrow:hover { border-color: var(--ink); }
.link-arrow:hover span { transform: translateX(4px); }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 400 1.6rem/1 var(--serif); }
.brand-mark { width: 26px; height: 26px; color: var(--accent); }
.tld { color: var(--ink-soft); }
.nav-links { display: flex; gap: 28px; list-style: none; margin: 0; padding: 0; }
.nav-links a { text-decoration: none; font-size: 0.95rem; color: var(--ink-soft); }
.nav-links a:hover { color: var(--ink); }

/* ---------- Hero ---------- */
.hero { padding: clamp(48px, 9vw, 110px) 0 40px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(32px, 6vw, 80px); align-items: center; }
.hero h1 { font-family: var(--serif); font-size: clamp(2.9rem, 7.2vw, 5.6rem); line-height: 0.98; letter-spacing: -0.015em; }
.lede { margin-top: 28px; font-size: clamp(1.05rem, 1.6vw, 1.2rem); color: var(--ink-soft); max-width: 34em; }
.hero-cta { margin-top: 36px; display: flex; flex-wrap: wrap; align-items: center; gap: 24px; }

.hero-art { margin: 0; }
.hero-art figcaption { margin-top: 14px; color: var(--ink-soft); text-align: center; }
.chawl-drawing { width: 100%; height: auto; display: block; }
.chawl-drawing .ink { fill: none; stroke: var(--ink); stroke-width: 2.4; stroke-linejoin: round; }
.chawl-drawing .thin { fill: none; stroke: var(--ink-soft); stroke-width: 1.1; }
.chawl-drawing .window rect { fill: var(--paper-2); stroke: var(--ink); stroke-width: 1.6; }
.chawl-drawing .window.door rect { fill: var(--accent); }
.chawl-drawing .window.lit rect { fill: var(--lit); animation: flicker 6s ease-in-out infinite; }
.chawl-drawing .window.lit.d2 rect { animation-delay: 1.2s; }
.chawl-drawing .window.lit.d3 rect { animation-delay: 2.4s; }
.chawl-drawing .window.lit.d4 rect { animation-delay: 3.6s; }
.chawl-drawing .cloth { stroke: var(--ink); stroke-width: 1; }
.chawl-drawing .c1 { fill: var(--warm); }
.chawl-drawing .c2 { fill: var(--accent); }
.chawl-drawing .c3 { fill: var(--lit); }

@keyframes flicker {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.72; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .chawl-drawing .window.lit rect { animation: none; }
  .btn, .link-arrow span { transition: none; }
}

/* ---------- Stats ---------- */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  margin-top: clamp(56px, 8vw, 96px);
  border-top: 1px solid var(--line);
}
.stat { padding: 26px 20px 0 0; display: flex; flex-direction: column; gap: 6px; }
.stat + .stat { padding-left: 20px; border-left: 1px solid var(--line); }
.stat-num { font: 400 clamp(2.4rem, 4.5vw, 3.4rem)/1 var(--serif); }
.stat-label { font-size: 0.92rem; color: var(--ink-soft); }

/* ---------- Sections ---------- */
.section { padding: clamp(72px, 11vw, 130px) 0; }
.section-alt { background: var(--paper-2); }
.section-head { max-width: 720px; margin-bottom: clamp(40px, 6vw, 64px); }
.section h2 { font-family: var(--serif); font-size: clamp(2.2rem, 4.8vw, 3.6rem); line-height: 1.04; letter-spacing: -0.01em; }
.section-sub { margin-top: 20px; color: var(--ink-soft); font-size: 1.08rem; max-width: 40em; }

/* ---------- Services ---------- */
.services { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--ink); }
.service { padding: 32px 28px 8px 0; }
.service + .service { padding-left: 28px; border-left: 1px solid var(--line); }
.service-num { color: var(--warm); }
.service h3 { font: 400 2rem/1.1 var(--serif); margin: 14px 0 12px; }
.service > p { color: var(--ink-soft); }
.service ul { list-style: none; margin: 22px 0 0; padding: 0; }
.service li { padding: 11px 0; border-top: 1px dashed var(--line); font-size: 0.97rem; }

/* ---------- Cases ---------- */
.cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px 32px;
  display: flex; flex-direction: column; gap: 14px;
}
.case-tag { color: var(--accent); text-transform: uppercase; letter-spacing: 0.1em; }
.case-client { font: 400 2.2rem/1.05 var(--serif); }
.case p { color: var(--ink-soft); }
.case-cta { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.case-cta .case-tag, .case-cta p { color: var(--accent-ink); opacity: 0.85; }
.case-cta .link-arrow { margin-top: auto; align-self: flex-start; border-color: color-mix(in srgb, var(--accent-ink) 45%, transparent); }
.case-cta .link-arrow:hover { border-color: var(--accent-ink); }

/* ---------- Steps ---------- */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; counter-reset: s; }
.step { border-top: 2px solid var(--ink); padding-top: 22px; }
.step-num { color: var(--warm); }
.step h3 { font: 400 1.7rem/1.1 var(--serif); margin: 10px 0 10px; }
.step p { color: var(--ink-soft); font-size: 0.97rem; }

/* ---------- Team ---------- */
.team-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: center; }
.team-grid .section-head { margin-bottom: 0; }
.founders {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: 1fr 1fr;
  border: 2px solid var(--ink); border-radius: 4px;
}
.founder {
  aspect-ratio: 1 / 0.8;
  padding: 22px;
  display: flex; flex-direction: column; justify-content: space-between;
  background: var(--paper);
}
.founder:nth-child(odd) { border-right: 1px solid var(--ink); }
.founder:nth-child(-n+2) { border-bottom: 1px solid var(--ink); }
.founder:nth-child(1) { background: color-mix(in srgb, var(--lit) 22%, var(--paper)); }
.founder:nth-child(4) { background: color-mix(in srgb, var(--accent) 16%, var(--paper)); }
.room { color: var(--ink-soft); }
.founder-role { font: 400 1.6rem/1.1 var(--serif); }

/* ---------- Contact ---------- */
.contact { text-align: center; }
.contact-inner { display: flex; flex-direction: column; align-items: center; }
.contact h2 { font-size: clamp(2.6rem, 6.4vw, 4.8rem); }
.contact .section-sub { margin: 22px auto 36px; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 28px 0; color: var(--ink-soft); font-size: 0.9rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-grid, .team-grid { grid-template-columns: 1fr; }
  .hero-art { max-width: 460px; }
  .services, .cases { grid-template-columns: 1fr; }
  .service, .service + .service { padding: 28px 0 8px; border-left: 0; }
  .service + .service { border-top: 1px solid var(--line); }
  .steps { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(3) { padding-left: 0; border-left: 0; }
  .stat:nth-child(n+3) { padding-top: 22px; margin-top: 22px; border-top: 1px solid var(--line); }
}
@media (max-width: 720px) {
  .nav-links { display: none; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .steps { grid-template-columns: 1fr; }
  .founder { padding: 16px; }
  .founder-role { font-size: 1.3rem; }
  .btn-large { font-size: 1rem; padding: 16px 24px; }
}