:root {
  --ink: #111111;
  --paper: #f4f2ee;
  --muted: #5a5a5a;
  --rule: #111111;
  --accent: #d6301f;
  --sans: "Switzer", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --pad: clamp(20px, 4vw, 56px);
}

* { box-sizing: border-box; margin: 0; padding: 0; border-radius: 0; }

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.5;
}

img { display: block; max-width: 100%; height: auto; background: #dcd8d0; }
a { color: inherit; }
.mono { font-family: var(--mono); font-size: 0.85em; letter-spacing: 0.01em; }
.label { font-family: var(--mono); font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 24px; }

/* Header */
.top {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px var(--pad);
  border-bottom: 1px solid var(--rule);
  position: sticky; top: 0; background: var(--paper); z-index: 10;
}
.wordmark { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; text-decoration: none; letter-spacing: -0.01em; }
.logo { height: 28px; width: auto; background: none; }
nav { display: flex; gap: 28px; font-size: 15px; }
nav a { text-decoration: none; }
nav a:hover { text-decoration: underline; }
.nav-cta { border: 1px solid var(--ink); padding: 6px 14px; }
.nav-cta:hover { background: var(--ink); color: var(--paper); text-decoration: none; }

/* Sections */
section { padding: 72px var(--pad); border-bottom: 1px solid var(--rule); }

/* Hero */
.hero { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: end; padding-top: 88px; }
h1 { font-size: clamp(40px, 6vw, 80px); line-height: 1; font-weight: 600; letter-spacing: -0.03em; margin-bottom: 28px; }
.lede { font-size: 19px; max-width: 34ch; margin-bottom: 32px; }
.hero-img img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border: 1px solid var(--rule); }
figcaption { margin-top: 8px; color: var(--muted); }

.button {
  display: inline-block; background: var(--accent); color: #fff;
  font-family: var(--sans); font-size: 16px; font-weight: 600;
  padding: 14px 24px; border: none; text-decoration: none; cursor: pointer;
}
.button:hover { background: var(--ink); }

/* Problem */
.problem { display: grid; grid-template-columns: 200px 1fr; gap: 32px; }
.problem-body { max-width: 640px; }
.problem-body p { margin-bottom: 16px; }
.big { font-size: clamp(28px, 3.4vw, 44px); line-height: 1.1; font-weight: 500; letter-spacing: -0.02em; margin-bottom: 28px !important; }

/* How */
.how { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; }
.how .label { grid-column: 1 / -1; margin-bottom: 0; }
.steps { list-style: none; }
.steps li { display: grid; grid-template-columns: 48px 1fr; column-gap: 16px; padding: 22px 0; border-top: 1px solid var(--rule); }
.steps li:last-child { border-bottom: 1px solid var(--rule); }
.step-num { grid-row: span 2; font-size: 15px; padding-top: 3px; }
.steps h3 { font-size: 22px; font-weight: 600; margin-bottom: 4px; }
.detail-img img { width: 78%; margin-left: auto; aspect-ratio: 1 / 1; object-fit: cover; border: 1px solid var(--rule); }

/* Who */
.who-grid { display: grid; grid-template-columns: 2fr 1fr; border-top: 1px solid var(--rule); }
.who-main { padding: 28px 40px 8px 0; border-right: 1px solid var(--rule); }
.who-side { padding: 28px 0 8px 32px; }
.who-main h2 { font-size: clamp(30px, 3.6vw, 48px); line-height: 1.05; letter-spacing: -0.02em; font-weight: 600; margin-bottom: 14px; }
.who-side h2 { font-size: 22px; font-weight: 600; margin-bottom: 10px; }
.who-main p { font-size: 19px; max-width: 46ch; }

/* Specs */
.specs { display: grid; grid-template-columns: 200px 1fr; gap: 32px; }
.spec-table { width: 100%; max-width: 640px; border-collapse: collapse; font-size: 15px; }
.spec-table td { padding: 12px 0; border-top: 1px solid var(--rule); }
.spec-table tr:last-child td { border-bottom: 1px solid var(--rule); }
.spec-table td:first-child { width: 40%; color: var(--muted); }

/* Contact */
.contact { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; background: var(--ink); color: var(--paper); }
.contact h2 { font-size: clamp(32px, 4vw, 56px); line-height: 1; letter-spacing: -0.02em; font-weight: 600; margin-bottom: 16px; }
.form { display: flex; flex-direction: column; gap: 18px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-family: var(--mono); font-size: 13px; text-transform: uppercase; letter-spacing: 0.05em; }
.form input, .form textarea {
  font-family: var(--sans); font-size: 17px; color: var(--paper);
  background: transparent; border: none; border-bottom: 1px solid var(--paper);
  padding: 8px 0; outline: none; text-transform: none; letter-spacing: 0;
}
.form input:focus, .form textarea:focus { border-bottom-color: var(--accent); }
.form .button { align-self: flex-start; margin-top: 8px; }
.form .button:hover { background: var(--paper); color: var(--ink); }
.form-status { min-height: 1.2em; }

/* Footer */
.bottom { display: flex; justify-content: space-between; padding: 22px var(--pad); font-weight: 600; }

/* Mobile */
@media (max-width: 800px) {
  nav a:not(.nav-cta) { display: none; }
  .hero, .problem, .how, .specs, .contact, .who-grid { grid-template-columns: 1fr; }
  .who-main { border-right: none; border-bottom: 1px solid var(--rule); padding-right: 0; }
  .who-side { padding-left: 0; }
  .detail-img img { width: 100%; }
  section { padding: 56px var(--pad); }
}