:root {
  --ink: #0f1b2d; --ink-2: #44526a; --ink-3: #6b7890;
  --bg: #ffffff; --bg-alt: #f4f7fb; --line: #e1e7f0;
  --brand: #0f2a4a; --accent: #1d6fd8; --accent-ink: #ffffff; --accent-soft: #e8f1fd;
  --radius: 14px; --shadow: 0 1px 2px rgba(15, 27, 45, .06), 0 8px 24px rgba(15, 27, 45, .06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef2f8; --ink-2: #b6c1d3; --ink-3: #8b97ab;
    --bg: #0d1420; --bg-alt: #121b2a; --line: #233046;
    --brand: #dbe7f7; --accent: #4f95ef; --accent-ink: #08111d; --accent-soft: #16263d;
    --shadow: none;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 76px; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: var(--accent-ink); padding: 8px 12px; border-radius: 8px; z-index: 10; }
.skip:focus { left: 12px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* header */
.site-header { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -.01em; text-decoration: none; font-size: 18px; }
.mark { width: 30px; height: 30px; flex: none; }
.mark rect { fill: var(--brand); }
.mark path { fill: none; stroke: var(--bg); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.site-header nav { display: flex; align-items: center; gap: 22px; font-size: 15px; }
.site-header nav a { text-decoration: none; color: var(--ink-2); }
.site-header nav a:hover { color: var(--ink); }
.nav-cta { background: var(--accent); color: var(--accent-ink) !important; padding: 8px 14px; border-radius: 999px; font-weight: 600; }
@media (max-width: 560px) { .site-header nav a:not(.nav-cta) { display: none; } }

/* hero */
.hero { padding: 72px 0 64px; background: radial-gradient(1200px 400px at 85% -10%, var(--accent-soft), transparent 70%); }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; gap: 40px; } .hero { padding: 48px 0; } }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: 13px; font-weight: 700; color: var(--accent); margin: 0 0 12px; }
h1 { font-size: clamp(36px, 5.4vw, 58px); line-height: 1.06; letter-spacing: -.03em; margin: 0 0 20px; }
.lede { font-size: clamp(18px, 2vw, 20px); color: var(--ink-2); margin: 0 0 28px; max-width: 38em; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 13px 20px; border-radius: 10px; font-weight: 600; text-decoration: none; font-size: 16px; border: 1px solid transparent; }
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.07); }
.btn.ghost { border-color: var(--line); background: var(--bg); }
.btn.ghost:hover { border-color: var(--ink-3); }
.btn.large { padding: 16px 24px; font-size: 17px; }

.hero-card { margin: 0; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.hero-card figcaption { font-weight: 700; margin-bottom: 14px; }
.flow { list-style: none; margin: 0; padding: 0; position: relative; }
.flow::before { content: ""; position: absolute; left: 9px; top: 12px; bottom: 12px; width: 2px; background: var(--line); }
.flow li { display: flex; gap: 14px; padding: 10px 0; position: relative; }
.flow b { display: block; font-size: 16px; }
.flow small { color: var(--ink-3); font-size: 14px; }
.dot { width: 20px; height: 20px; border-radius: 50%; flex: none; margin-top: 3px; border: 4px solid var(--bg); position: relative; z-index: 1; }
.d1 { background: #8aa0bf; } .d2 { background: var(--accent); } .d3 { background: #2aa37a; } .d4 { background: #d9822b; }
.fig-note { font-size: 13px; color: var(--ink-3); margin: 12px 0 0; }

/* sections */
.section { padding: 80px 0; }
.section.alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
@media (max-width: 700px) { .section { padding: 56px 0; } }
h2 { font-size: clamp(28px, 3.4vw, 38px); letter-spacing: -.02em; line-height: 1.15; margin: 0 0 12px; }
h3 { font-size: 19px; margin: 0 0 8px; letter-spacing: -.01em; }
.section-lede { color: var(--ink-2); margin: 0 0 36px; max-width: 40em; }
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
@media (max-width: 1000px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .cards { grid-template-columns: 1fr; } }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; background: var(--bg); box-shadow: var(--shadow); }
.card p { color: var(--ink-2); margin: 0; font-size: 16px; }
.icon { width: 44px; height: 44px; border-radius: 12px; background: var(--accent-soft); display: grid; place-items: center; margin-bottom: 16px; }
.icon svg { width: 24px; height: 24px; fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.steps { list-style: none; padding: 0; margin: 32px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; counter-reset: s; }
@media (max-width: 800px) { .steps { grid-template-columns: 1fr; } }
.steps p { color: var(--ink-2); margin: 0; font-size: 16px; }
.num { display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: var(--brand); color: var(--bg); font-weight: 700; margin-bottom: 14px; }

.principles { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; }
@media (max-width: 800px) { .principles { grid-template-columns: 1fr; gap: 8px; } }
.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.checks li { padding: 14px 16px 14px 48px; border: 1px solid var(--line); border-radius: 12px; position: relative; background: var(--bg); }
.checks li::before { content: ""; position: absolute; left: 16px; top: 17px; width: 18px; height: 18px; border-radius: 50%; background: var(--accent-soft);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Cpath d='M5 9.5l2.5 2.5L13 6.5' fill='none' stroke='%231d6fd8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); }

.contact { padding-top: 24px; }
.contact-box { background: var(--brand); color: var(--bg); border-radius: 20px; padding: 48px; display: grid; grid-template-columns: 1.2fr .8fr; gap: 32px; align-items: center; }
.contact-box h2 { color: var(--bg); }
.contact-box p { color: color-mix(in srgb, var(--bg) 82%, transparent); margin: 0; }
@media (max-width: 800px) { .contact-box { grid-template-columns: 1fr; padding: 32px 24px; } }
.contact-actions { display: grid; gap: 12px; justify-items: start; }
.contact-box .btn.primary { background: var(--bg); color: var(--brand); }
.email { color: var(--bg); font-size: 15px; word-break: break-all; }

.site-footer { border-top: 1px solid var(--line); margin-top: 72px; }
.foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 24px 20px; color: var(--ink-3); font-size: 14px; }
.foot nav { display: flex; gap: 18px; }
.foot a { text-decoration: none; }
.foot a:hover { color: var(--ink); }

/* simple text pages */
.page { padding: 56px 0 24px; max-width: 760px; }
.page h1 { font-size: clamp(32px, 4vw, 44px); }
.page h2 { font-size: 22px; margin-top: 32px; }
.page p, .page li { color: var(--ink-2); }