:root {
  --ink: #111827; --indigo: #4F46E5; --bg: #FFFFFF; --muted: #4B5563; --line: #E5E7EB; --soft: #F9FAFB; --border-interactive: #6B7280; --error: #DC2626;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #F9FAFB; --bg: #111827; --muted: #9CA3AF; --line: #1F2937; --soft: #0B1220; --border-interactive: #9CA3AF; --error: #F87171; }
}
* { box-sizing: border-box; }
html { scroll-behavior: auto; }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 17px/1.6 Inter, ui-sans-serif, system-ui, sans-serif; }
.wrap { max-width: 64rem; margin: 0 auto; padding: 0 16px; }
.bar { display: flex; align-items: center; justify-content: space-between; padding-top: 20px; padding-bottom: 20px; flex-wrap: wrap; gap: 12px; }
.logo img { display: block; height: 24px; width: auto; }
nav { display: flex; gap: 20px; }
nav a, .foot a { color: var(--muted); text-decoration: none; }
nav a:hover, .foot a:hover { color: var(--ink); }
h1 { font-size: clamp(2.25rem, 6vw, 4rem); line-height: 1.08; letter-spacing: -0.03em; margin: 0 0 20px; font-weight: 700; max-width: 14ch; }
h2 { font-size: 1.5rem; letter-spacing: -0.02em; margin: 0 0 12px; }
h3 { font-size: 1.05rem; margin: 12px 0 4px; }
section { padding-top: 56px; padding-bottom: 8px; }
section.wrap { padding-block: 56px 8px; }
.hero { padding-top: 72px; }
.hero.wrap { padding-top: 72px; }
.lede { font-size: 1.2rem; color: var(--muted); max-width: 40rem; margin: 0 0 28px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 20px; border-radius: 10px; border: 1px solid var(--border-interactive); color: var(--ink); background: transparent; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.button.primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.button:focus-visible, input:focus-visible, a:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.join { background: var(--soft); border: 1px solid var(--line); border-radius: 16px; margin: 56px auto 0; width: calc(100% - 32px); max-width: 64rem; }
.join.wrap { padding: 28px; }
.join form { display: flex; gap: 10px; flex-wrap: wrap; }
.join input { min-height: 44px; width: 12ch; padding: 0 14px; border: 1px solid var(--border-interactive); border-radius: 10px; background: var(--bg); color: var(--ink); font: 600 1.1rem/1 ui-monospace, Menlo, Consolas, monospace; letter-spacing: 0.15em; text-transform: uppercase; }
.join input[aria-invalid="true"] { border-color: var(--error); }
.error { color: var(--error); min-height: 1.6em; margin: 8px 0 0; }
.steps { padding-left: 1.25rem; display: grid; gap: 10px; max-width: 44rem; }
.features { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 24px; }
.features p, .two p, .privacy p { color: var(--muted); margin: 0; }
.icon { display: block; width: 24px; height: 24px; background: currentColor; -webkit-mask: var(--icon) center / contain no-repeat; mask: var(--icon) center / contain no-repeat; }
.two { display: grid; grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr)); gap: 32px; }
.privacy p { max-width: 44rem; }
.foot { display: flex; flex-wrap: wrap; gap: 20px; padding-top: 56px; padding-bottom: 40px; color: var(--muted); border-top: 1px solid var(--line); margin-top: 56px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; background: var(--bg); padding: 8px 12px; border-radius: 8px; }