/* SandOaks — minimal styles */

:root {
  --bg: #FBFAF7;
  --paper: #F4F1EA;
  --ink: #15140F;
  --oak: #3D372C;
  --muted: #8A8475;
  --rule: #E3DFD3;
  --accent: #B5613A;

  --font-serif: 'Newsreader', 'Source Serif 4', Georgia, serif;
  --font-sans: 'Inter Tight', 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;

  --pad-x: clamp(24px, 6vw, 96px);
  --row-gap: clamp(96px, 12vw, 180px);
  --maxw: 1240px;
}

body[data-density="airy"]    { --row-gap: clamp(140px, 16vw, 240px); }
body[data-density="compact"] { --row-gap: clamp(64px, 8vw, 112px); }

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
::selection { background: var(--ink); color: var(--bg); }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: -0.018em;
  margin: 0;
  line-height: 1.04;
  text-wrap: balance;
}
h1 em, h2 em, h3 em { font-style: italic; font-weight: 400; }

p { margin: 0 0 1em; text-wrap: pretty; }

.serif { font-family: var(--font-serif); }
.mono  { font-family: var(--font-mono); }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.muted { color: var(--muted); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad-x); }

section.row { padding: var(--row-gap) 0; }
.hairline { border-top: 1px solid var(--rule); }

/* ============ HEADER ============ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--bg) 90%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.site-header .inner {
  display: flex; align-items: center; gap: 32px;
  height: 64px; padding: 0 var(--pad-x);
  max-width: var(--maxw); margin: 0 auto;
}
.brand {
  font-family: var(--font-serif);
  font-size: 22px;
  letter-spacing: -0.01em;
  display: flex; align-items: center; gap: 10px;
}
nav.primary { display: flex; gap: 28px; margin-left: auto; }
nav.primary a {
  font-size: 13.5px;
  color: var(--oak);
  padding: 6px 0;
  transition: color .15s;
}
nav.primary a:hover { color: var(--ink); }
.header-cta {
  font-family: var(--font-mono); font-size: 12px;
  border: 1px solid var(--ink);
  padding: 8px 14px; border-radius: 999px;
  transition: background .2s, color .2s;
}
.header-cta:hover { background: var(--ink); color: var(--bg); }

/* ============ HERO ============ */
.hero { padding: clamp(80px, 14vw, 200px) 0 clamp(80px, 12vw, 160px); }
.hero .eyebrow-row {
  display: flex; gap: 24px; align-items: baseline; flex-wrap: wrap;
  margin-bottom: clamp(48px, 7vw, 96px);
}
.hero h1 {
  font-size: clamp(56px, 10vw, 152px);
  letter-spacing: -0.028em;
  max-width: 14ch;
}
.hero .sub {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.2vw, 26px);
  color: var(--oak);
  max-width: 42ch;
  line-height: 1.4;
  margin-top: clamp(48px, 6vw, 80px);
}
body[data-hero="split"] .hero-grid {
  display: grid; grid-template-columns: 1.3fr 1fr; gap: 80px; align-items: end;
}
body[data-hero="split"] .hero h1 { font-size: clamp(48px, 7vw, 104px); max-width: none; }
body[data-hero="split"] .hero .sub { margin-top: 0; }
body[data-hero="centered"] .hero { text-align: center; }
body[data-hero="centered"] .hero h1 { margin-left: auto; margin-right: auto; }
body[data-hero="centered"] .hero .sub { margin-left: auto; margin-right: auto; }
body[data-hero="centered"] .hero .eyebrow-row { justify-content: center; }
@media (max-width: 900px) {
  body[data-hero="split"] .hero-grid { grid-template-columns: 1fr; gap: 40px; }
}

/* ============ FOCUS AREAS ============ */
.focus {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.focus .area {
  padding: clamp(48px, 6vw, 96px) clamp(32px, 4vw, 72px);
  display: flex;
  flex-direction: column;
  min-height: 640px;
  position: relative;
}
.focus .area + .area { border-left: 1px solid var(--rule); }
.focus .area .num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 28px;
}
.focus .area h2 {
  font-size: clamp(36px, 4.6vw, 60px);
  letter-spacing: -0.022em;
  margin-bottom: 24px;
  max-width: 14ch;
}
.focus .area .lede {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--oak);
  max-width: 42ch;
  line-height: 1.5;
}
.focus .area .viz {
  margin-top: clamp(40px, 5vw, 72px);
  flex: 1;
  min-height: 200px;
  display: flex;
  flex-direction: column;
}
.focus .area .viz-frame {
  flex: 1;
  position: relative;
  border-top: 1px solid var(--rule);
  padding-top: 16px;
  min-height: 220px;
  height: 240px;
}
.focus .area .viz canvas {
  position: absolute;
  inset: 16px 0 0 0;
  width: 100%;
  height: calc(100% - 16px);
  display: block;
}
.focus .area .legend {
  display: flex; gap: 18px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}
.focus .area .legend .sw {
  display: inline-block; width: 12px; height: 2px;
  margin-right: 8px; vertical-align: middle;
}

@media (max-width: 900px) {
  .focus { grid-template-columns: 1fr; }
  .focus .area + .area { border-left: 0; border-top: 1px solid var(--rule); }
  .focus .area { min-height: 520px; }
}

/* ============ SECTION HEADERS ============ */
.sec-head {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  align-items: baseline;
  margin-bottom: clamp(48px, 6vw, 80px);
}
.sec-head .label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.sec-head h2 {
  font-size: clamp(32px, 4.6vw, 56px);
}
@media (max-width: 760px) {
  .sec-head { grid-template-columns: 1fr; gap: 16px; }
}

/* ============ APPROACH ============ */
.approach {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
}
.approach .step {
  padding: 40px 32px 48px 0;
  border-right: 1px solid var(--rule);
  padding-left: 32px;
}
.approach .step:last-child { border-right: 0; }
.approach .step .n {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.approach .step h3 {
  font-size: 26px;
  margin-bottom: 14px;
  letter-spacing: -0.015em;
}
.approach .step p {
  font-size: 15px; color: var(--oak); margin: 0;
  max-width: 36ch;
}
@media (max-width: 800px) {
  .approach { grid-template-columns: 1fr; }
  .approach .step { border-right: 0; border-bottom: 1px solid var(--rule); }
  .approach .step:last-child { border-bottom: 0; }
}

/* ============ FACTS ROW ============ */
.facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.facts .fact {
  padding: 32px 24px;
  border-right: 1px solid var(--rule);
}
.facts .fact:last-child { border-right: 0; }
.facts .fact .v {
  font-family: var(--font-serif);
  font-size: clamp(40px, 4.5vw, 56px);
  letter-spacing: -0.025em;
  line-height: 1;
  margin-bottom: 12px;
  font-feature-settings: "tnum";
}
.facts .fact .v small { font-family: var(--font-mono); font-size: 14px; color: var(--muted); margin-left: 6px; letter-spacing: 0.04em; }
.facts .fact .l {
  font-family: var(--font-mono); font-size: 10.5px;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted);
}
@media (max-width: 800px) {
  .facts { grid-template-columns: repeat(2, 1fr); }
  .facts .fact:nth-child(2) { border-right: 0; }
  .facts .fact:nth-child(1), .facts .fact:nth-child(2) { border-bottom: 1px solid var(--rule); }
}

/* ============ CONTACT ============ */
.contact-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: end;
}
.contact-row h2 { font-size: clamp(40px, 6vw, 80px); max-width: 14ch; }
.contact-row form {
  display: flex; gap: 12px;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 12px;
}
.contact-row input {
  flex: 1; border: 0; background: transparent;
  font-family: var(--font-serif); font-size: 22px; color: var(--ink);
  outline: none; padding: 8px 0;
}
.contact-row input::placeholder { color: var(--muted); }
@media (max-width: 800px) {
  .contact-row { grid-template-columns: 1fr; gap: 40px; }
}

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.06em; text-transform: uppercase;
  padding: 14px 22px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: transparent; color: var(--ink);
  cursor: pointer; transition: background .2s, color .2s;
}
.btn:hover { background: var(--ink); color: var(--bg); }
.btn.solid { background: var(--ink); color: var(--bg); }
.btn.solid:hover { background: var(--accent); border-color: var(--accent); }

/* ============ FOOTER ============ */
footer.site-footer {
  border-top: 1px solid var(--rule);
  padding: 64px 0 40px;
  margin-top: 0;
}
footer.site-footer .top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
footer.site-footer .word {
  font-family: var(--font-serif);
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  max-width: 14ch;
}
footer.site-footer h4 {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
  font-weight: 400;
}
footer.site-footer ul {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 8px;
  font-size: 14.5px;
}
footer.site-footer ul a:hover { color: var(--accent); }
footer.site-footer .bottom {
  display: flex; justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted);
}
@media (max-width: 800px) { footer.site-footer .top { grid-template-columns: 1fr 1fr; } }

/* ============ PALETTE VARIANTS ============ */
body[data-palette="cool"] {
  --bg: #F4F6F8;
  --paper: #E9ECF0;
  --ink: #0F1A26;
  --oak: #2A3A4A;
  --muted: #7C8694;
  --rule: #D2D8E0;
  --accent: #2A6FDB;
}
body[data-palette="bw"] {
  --bg: #F5F4F1;
  --paper: #ECEBE6;
  --ink: #0A0A0A;
  --oak: #2B2B2B;
  --muted: #7A7A7A;
  --rule: #D8D5CC;
  --accent: #C2410C;
}
body[data-palette="moss"] {
  --bg: #F1EEE0;
  --paper: #E5E1CE;
  --ink: #1B2418;
  --oak: #344029;
  --muted: #7A8472;
  --rule: #CFCAB5;
  --accent: #6F8246;
}