:root {
  --bg: #ffffff;
  --bg-alt: #f5f5f7;
  --ink: #1d1d1f;
  --ink-2: #6e6e73;
  --line: rgba(0, 0, 0, 0.1);
  --accent: #5b3df5;
  --accent-ink: #ffffff;
  --nav-bg: rgba(255, 255, 255, 0.8);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Inter, "Segoe UI", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --bg-alt: #161617;
    --ink: #f5f5f7;
    --ink-2: #a1a1a6;
    --line: rgba(255, 255, 255, 0.14);
    --accent: #8c7bff;
    --accent-ink: #000000;
    --nav-bg: rgba(0, 0, 0, 0.72);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* Navigation */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: var(--nav-bg);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 22px;
  height: 52px; display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 17px; letter-spacing: -0.02em; }
.brand svg { width: 22px; height: 22px; }
.brand b { font-weight: 700; }
.brand span { font-weight: 300; }
.nav-links { display: flex; gap: 28px; font-size: 13px; color: var(--ink-2); }
.nav-links a { transition: color 0.2s; }
.nav-links a:hover { color: var(--ink); }

/* Hero */
.hero {
  text-align: center;
  padding: 120px 22px 110px;
  max-width: 980px; margin: 0 auto;
}
.hero-mark { width: 84px; height: 84px; margin: 0 auto 36px; display: block; }
.hero h1 {
  font-size: clamp(48px, 9vw, 96px);
  line-height: 1.04; letter-spacing: -0.035em; font-weight: 700;
}
.hero p {
  font-size: clamp(19px, 2.4vw, 26px);
  line-height: 1.35; color: var(--ink-2);
  max-width: 640px; margin: 24px auto 0; letter-spacing: -0.01em;
}
.actions { display: flex; gap: 14px; justify-content: center; margin-top: 36px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 24px; border-radius: 980px;
  font-size: 17px; font-weight: 400; border: 1px solid transparent;
  transition: transform 0.2s, opacity 0.2s;
}
.btn:hover { opacity: 0.88; }
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-secondary { color: var(--accent); border-color: var(--accent); }

/* One entrance moment: the hero */
@media (prefers-reduced-motion: no-preference) {
  .hero-mark { animation: rise 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
  .hero h1 { animation: rise 0.9s 0.12s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
  .hero p, .hero .actions { animation: rise 0.9s 0.24s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
  @keyframes rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
}

/* Divisions */
.divisions { max-width: 1080px; margin: 0 auto; padding: 0 22px 40px; display: grid; gap: 20px; }
.panel {
  background: var(--bg-alt);
  border-radius: 28px;
  padding: 64px 48px;
  display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center;
  scroll-margin-top: 72px;
}
.panel h2 { font-size: clamp(34px, 5vw, 56px); letter-spacing: -0.03em; line-height: 1.07; font-weight: 700; }
.panel p { font-size: 21px; line-height: 1.4; color: var(--ink-2); max-width: 520px; margin-top: 14px; letter-spacing: -0.01em; }
.panel .link { display: inline-block; margin-top: 22px; font-size: 19px; color: var(--accent); }
.panel .link:hover { text-decoration: underline; }
.panel svg { width: 150px; height: 150px; color: var(--accent); }

/* About */
.about { text-align: center; max-width: 820px; margin: 0 auto; padding: 110px 22px; }
.about h2 { font-size: clamp(32px, 5vw, 52px); letter-spacing: -0.03em; line-height: 1.1; font-weight: 700; }
.about p { margin-top: 22px; font-size: 21px; line-height: 1.45; color: var(--ink-2); letter-spacing: -0.01em; }

/* Contact */
.contact { background: var(--bg-alt); padding: 100px 22px; scroll-margin-top: 52px; }
.contact-inner { max-width: 560px; margin: 0 auto; }
.contact h2 { font-size: clamp(32px, 5vw, 48px); letter-spacing: -0.03em; font-weight: 700; text-align: center; }
.contact .lead { text-align: center; color: var(--ink-2); font-size: 19px; margin: 12px 0 36px; }
form { display: grid; gap: 14px; }
label { font-size: 14px; color: var(--ink-2); display: grid; gap: 6px; }
input, select, textarea {
  font: inherit; font-size: 17px; color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: 14px;
  padding: 14px 16px; width: 100%;
}
textarea { min-height: 130px; resize: vertical; }
form .btn { justify-self: start; cursor: pointer; font-family: inherit; }
.hint { font-size: 13px; color: var(--ink-2); }

/* Footer */
footer { padding: 28px 22px; font-size: 12px; color: var(--ink-2); text-align: center; border-top: 1px solid var(--line); }

@media (max-width: 720px) {
  .nav-links a:not(:last-child) { display: none; }
  .hero { padding: 80px 22px 70px; }
  .panel { grid-template-columns: 1fr; padding: 44px 28px; gap: 24px; }
  .panel svg { width: 90px; height: 90px; order: -1; }
  .about { padding: 80px 22px; }
}