:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #1d2433;
  --muted: #5b6474;
  --line: #e4e1da;
  --accent: #0f6e6a;
  --accent-soft: #e3f1ef;
  --warn-soft: #fbf1dd;
  --warn: #8a5a00;
  --radius: 10px;
  --max: 920px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151b;
    --surface: #1a1f27;
    --ink: #e8eaee;
    --muted: #a0a8b6;
    --line: #2c333e;
    --accent: #5cc5bc;
    --accent-soft: #173432;
    --warn-soft: #33290f;
    --warn: #e6c070;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* Nav */
.nav { border-bottom: 1px solid var(--line); background: var(--surface); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; flex-wrap: wrap; }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.nav ul { list-style: none; display: flex; gap: 20px; margin: 0; padding: 0; flex-wrap: wrap; }
.nav ul a { color: var(--muted); text-decoration: none; font-size: 15px; }
.nav ul a:hover { color: var(--accent); }

/* Hero */
.hero { padding: 72px 0 48px; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.12em; font-size: 13px; font-weight: 600; color: var(--accent); margin: 0 0 12px; }
h1 { font-size: clamp(32px, 5vw, 46px); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 18px; }
.lead { font-size: 19px; color: var(--muted); max-width: 680px; margin: 0 0 28px; }
.btns { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 11px 20px; border-radius: 8px; font-weight: 600; font-size: 15px; text-decoration: none; border: 1px solid var(--accent); }
.btn.primary { background: var(--accent); color: var(--bg); }
.btn.ghost { color: var(--accent); }

/* Sections */
section { padding: 40px 0; }
h2 { font-size: 26px; letter-spacing: -0.01em; margin: 0 0 20px; }
h3 { font-size: 19px; margin: 28px 0 10px; }
.muted { color: var(--muted); }

/* Case cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: flex; flex-direction: column; text-decoration: none; color: var(--ink); transition: border-color .15s, transform .15s; }
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card h3 { margin: 6px 0 8px; font-size: 18px; }
.card p { margin: 0 0 14px; color: var(--muted); font-size: 15px; flex: 1; }
.tag { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--accent); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font-size: 12.5px; padding: 3px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }

/* Skills */
.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 18px; }
.skills div { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.skills h4 { margin: 0 0 8px; font-size: 15px; }
.skills ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 15px; }

/* Case study pages */
.case-head { padding: 56px 0 24px; border-bottom: 1px solid var(--line); }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin: 26px 0 0; }
.facts div { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; }
.facts b { display: block; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 600; }
.facts span { font-size: 15px; }
article { padding: 24px 0 56px; }
article h2 { margin-top: 44px; font-size: 22px; }
article ul, article ol { padding-left: 22px; }
article li { margin-bottom: 6px; }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; margin: 18px 0; overflow-x: auto; }
.panel h4 { margin: 0 0 10px; font-size: 14px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.note { background: var(--warn-soft); color: var(--warn); border-radius: 8px; padding: 12px 16px; font-size: 15px; margin: 18px 0; }

table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12.5px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 600; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; margin: 18px 0; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.stat .n { font-size: 28px; font-weight: 700; color: var(--accent); line-height: 1.2; }
.stat .l { font-size: 14px; color: var(--muted); }

/* Process flow */
.flow { display: flex; flex-wrap: wrap; align-items: stretch; gap: 8px; }
.step { flex: 1 1 130px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; font-size: 14px; position: relative; }
.step b { display: block; font-size: 11.5px; color: var(--accent); text-transform: uppercase; letter-spacing: .05em; }
.step.pain { border-color: var(--warn); }
.step.pain b { color: var(--warn); }
.arrow { align-self: center; color: var(--muted); font-size: 18px; }

.story { border-left: 3px solid var(--accent); padding: 4px 0 4px 14px; margin: 14px 0; }
.story p { margin: 0 0 6px; }
.story ul { margin: 0; font-size: 15px; color: var(--muted); }

/* Dashboard wireframe */
.wire { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.wire > div { background: var(--bg); border: 1px dashed var(--muted); border-radius: 6px; padding: 10px; font-size: 13px; color: var(--muted); min-height: 64px; }
.wire .w2 { grid-column: span 2; min-height: 150px; }
.wire .w4 { grid-column: span 4; min-height: 110px; }
.wire b { display: block; color: var(--ink); font-size: 13px; }
@media (max-width: 600px) {
  .wire { grid-template-columns: repeat(2, 1fr); }
  .wire .w2, .wire .w4 { grid-column: span 2; }
  .arrow { display: none; }
}

.pager { display: flex; justify-content: space-between; gap: 12px; border-top: 1px solid var(--line); padding-top: 24px; margin-top: 48px; flex-wrap: wrap; }

footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }