:root {
  --bg: #ffffff; --panel: #fafafa; --fg: #0a0a0a; --muted: #5f5f5f;
  --line: #e5e5e5; --primary: #171717; --on-primary: #fafafa; --ok: #15803d;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b0b0b; --panel: #141414; --fg: #f5f5f5; --muted: #a3a3a3; --line: #262626; --primary: #f5f5f5; --on-primary: #0b0b0b; --ok: #4ade80; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: inherit; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
header { border-bottom: 1px solid var(--line); }
header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-weight: 700; font-size: 20px; letter-spacing: -0.02em; text-decoration: none; }
.logo span { display: inline-block; width: 22px; height: 15px; border-radius: 3px; background: var(--primary); margin-right: 8px; vertical-align: -1px; }
nav a { margin-left: 22px; text-decoration: none; color: var(--muted); font-size: 15px; }
nav a:hover { color: var(--fg); }
.hero { padding-top: 88px; padding-bottom: 72px; }
.hero h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.08; letter-spacing: -0.03em; margin: 0 0 20px; max-width: 760px; }
.hero p { font-size: 19px; color: var(--muted); max-width: 620px; margin: 0 0 32px; }
.btn { display: inline-block; background: var(--primary); color: var(--on-primary); padding: 12px 22px; border-radius: 8px; text-decoration: none; font-weight: 600; }
section { padding: 64px 0; border-top: 1px solid var(--line); }
h2 { font-size: 28px; letter-spacing: -0.02em; margin: 0 0 8px; }
.lede { color: var(--muted); margin: 0 0 36px; max-width: 640px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.steps { counter-reset: s; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.steps div { counter-increment: s; }
.steps div::before { content: counter(s); display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--line); font-weight: 600; font-size: 14px; margin-bottom: 10px; }
.steps h3 { margin: 0 0 4px; font-size: 17px; }
.steps p { margin: 0; color: var(--muted); font-size: 15px; }
ul.checks { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px 32px; }
ul.checks li { padding-left: 26px; position: relative; }
ul.checks li::before { content: "✓"; position: absolute; left: 0; color: var(--ok); font-weight: 700; }
.contact { display: flex; flex-wrap: wrap; gap: 40px; }
.contact div { min-width: 220px; }
.contact .k { color: var(--muted); font-size: 14px; }
footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
@media (max-width: 760px) {
  .grid, .steps, ul.checks { grid-template-columns: 1fr; }
  nav a:not(:last-child) { display: none; }
  .hero { padding-top: 56px; padding-bottom: 48px; }
}
nav a.btn { color: var(--on-primary); }
.btn.sm { padding: 7px 14px; font-size: 14px; }
.btn.ghost { background: transparent; color: var(--fg); border: 1px solid var(--line); margin-left: 8px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
button.btn { border: 0; font: inherit; font-weight: 600; cursor: pointer; }

/* forms */
.narrow { max-width: 560px; margin: 0 auto; padding: 56px 20px 72px; }
.narrow h1 { font-size: 32px; letter-spacing: -0.02em; margin: 0 0 8px; }
.narrow .lede { margin-bottom: 28px; }
.progress { display: flex; gap: 8px; margin-bottom: 28px; font-size: 13px; color: var(--muted); }
.progress span { flex: 1; border-top: 3px solid var(--line); padding-top: 6px; }
.progress span.on { border-color: var(--primary); color: var(--fg); font-weight: 600; }
form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
label { display: block; font-size: 14px; font-weight: 600; margin: 0 0 14px; }
label small { font-weight: 400; color: var(--muted); }
input, select, textarea { display: block; width: 100%; margin-top: 6px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--fg); font: inherit; font-weight: 400; }
input:focus, select:focus, textarea:focus { outline: 2px solid #2563eb; outline-offset: 1px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; }
.check input { width: auto; margin-top: 4px; }
.note { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; font-size: 14px; color: var(--muted); margin: 18px 0; }
.msg { margin-top: 16px; font-size: 15px; }
@media (max-width: 760px) { form .row { grid-template-columns: 1fr; } }