:root {
  color-scheme: light;
  --ink: #17131f;
  --muted: #696272;
  --violet: #5b2bdd;
  --orange: #ff6a00;
  --paper: #fbf9ff;
  --line: rgba(34, 22, 50, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(91, 43, 221, 0.12), transparent 34rem),
    radial-gradient(circle at 100% 20%, rgba(255, 106, 0, 0.10), transparent 32rem),
    var(--paper);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

a { color: var(--violet); }

.shell {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 46px 0 26px;
}

.icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  box-shadow: 0 12px 30px rgba(54, 30, 92, 0.18);
}

h1, h2 { letter-spacing: -0.025em; }
h1 { margin: 0; font-size: clamp(30px, 7vw, 46px); line-height: 1.05; }
h2 { margin: 36px 0 8px; font-size: 22px; }
p, li { color: var(--muted); }

.tagline { margin: 7px 0 0; font-size: 18px; }

.card {
  margin: 18px 0 54px;
  padding: clamp(24px, 6vw, 42px);
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 24px 70px rgba(52, 31, 78, 0.08);
  backdrop-filter: blur(18px);
}

.hero {
  font-size: clamp(22px, 5vw, 32px);
  line-height: 1.25;
  color: var(--ink);
}

nav { display: flex; flex-wrap: wrap; gap: 10px 18px; margin: 24px 0; }
nav a { font-weight: 600; text-decoration: none; }

.note {
  padding: 16px 18px;
  border-left: 4px solid var(--orange);
  background: rgba(255, 106, 0, 0.07);
  border-radius: 4px 14px 14px 4px;
}

footer {
  padding: 0 0 44px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 520px) {
  header { align-items: flex-start; }
  .icon { width: 60px; height: 60px; border-radius: 15px; }
}