:root {
  --bg: #ffffff;
  --fg: #14161a;
  --muted: #5b6470;
  --accent: #f6821f;
  --accent-fg: #ffffff;
  --line: #e6e8ec;
  --card: #f7f8fa;
  --radius: 14px;
  --wrap: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
a { color: inherit; }

/* Header / nav */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255,255,255,.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .nav { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { font-weight: 700; font-size: 1.15rem; text-decoration: none; letter-spacing: -.02em; }
.nav-links { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.nav-links a {
  text-decoration: none; color: var(--muted); font-weight: 500;
  padding: 8px 12px; border-radius: 8px;
}
.nav-links a:hover { color: var(--fg); background: var(--card); }
.nav-links a[aria-current="page"] { color: var(--fg); }
.nav-toggle {
  display: none; margin-left: auto; font-size: 1.4rem; line-height: 1;
  background: none; border: 0; cursor: pointer; color: var(--fg);
}

/* Sections */
main { padding: 72px 0; }
.hero { text-align: center; padding: 40px 0 64px; }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); line-height: 1.05; letter-spacing: -.03em; margin: 0 0 16px; }
.hero p.lead { font-size: 1.25rem; color: var(--muted); max-width: 620px; margin: 0 auto 28px; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); letter-spacing: -.02em; margin: 0 0 12px; }
p.lead { color: var(--muted); }

.btn {
  display: inline-block; text-decoration: none; font-weight: 600;
  padding: 12px 22px; border-radius: 10px;
  background: var(--accent); color: var(--accent-fg);
  transition: transform .08s ease, filter .15s ease;
}
.btn:hover { filter: brightness(1.05); }
.btn:active { transform: translateY(1px); }
.btn.ghost { background: transparent; color: var(--fg); border: 1px solid var(--line); }

.grid { display: grid; gap: 20px; grid-template-columns: repeat(3, 1fr); margin-top: 40px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.card h3 { margin: 0 0 8px; font-size: 1.15rem; }
.card p { margin: 0; color: var(--muted); }

.section { padding: 56px 0; border-top: 1px solid var(--line); }
.prose { max-width: 680px; }
.prose p { color: var(--muted); }

/* Form */
form.contact { max-width: 520px; display: grid; gap: 14px; margin-top: 28px; }
form.contact label { font-weight: 600; font-size: .95rem; }
form.contact input, form.contact textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line);
  border-radius: 10px; font: inherit; background: #fff;
}
form.contact textarea { min-height: 140px; resize: vertical; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0; color: var(--muted); }
.site-footer p { margin: 0; }

@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 12px 24px; display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px; }
}