:root {
  --bg: #EDF1EE;
  --ink: #0F3B33;
  --muted: #4A625C;
  --accent: #2450E8;
  --on-accent: #FFFFFF;
  --dot: #FFC933;
  --line: #C9D6D0;
  --field: #FFFFFF;
  --display: ui-rounded, "SF Pro Rounded", "Nunito", "Segoe UI", system-ui, sans-serif;
  --body: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0D1A17;
    --ink: #E8F1EC;
    --muted: #A9BDB6;
    --accent: #8CA8FF;
    --on-accent: #0D1A17;
    --dot: #FFD35C;
    --line: #27403A;
    --field: #13261F;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.125rem;
  line-height: 1.6;
}

.wrap {
  width: 100%;
  max-width: 58rem;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink);
  text-decoration: none;
}

.wordmark svg { width: 1.5rem; height: 1.5rem; flex: none; }

main {
  flex: 1;
  display: flex;
  align-items: center;
}

.hero {
  display: grid;
  gap: 2rem;
  padding-block: 1.5rem 3rem;
}

.ripple {
  width: min(100%, 9.5rem);
  justify-self: start;
}

.ripple svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.ring {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  transform-box: fill-box;
  transform-origin: center;
  opacity: var(--o);
}
.r1 { --o: 0.9; }
.r2 { --o: 0.6; }
.r3 { --o: 0.35; }
.r4 { --o: 0.18; }

.dot {
  fill: var(--dot);
  transform-box: fill-box;
  transform-origin: center;
}

@media (prefers-reduced-motion: no-preference) {
  .dot { animation: tap 0.45s ease-out both; }
  .ring { animation: ripple 1.6s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
  .r1 { animation-delay: 0.2s; }
  .r2 { animation-delay: 0.35s; }
  .r3 { animation-delay: 0.5s; }
  .r4 { animation-delay: 0.65s; }
}

@keyframes tap {
  from { transform: scale(0.5); }
  to { transform: scale(1); }
}

@keyframes ripple {
  from { transform: scale(0.2); opacity: 0; }
  40% { opacity: var(--o); }
  to { transform: scale(1); opacity: var(--o); }
}

h1 {
  margin: 0 0 1rem;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2.5rem, 8vw, 4.25rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.lede {
  margin: 0 0 0.75rem;
  font-size: 1.375rem;
  font-weight: 500;
  line-height: 1.4;
}

.sub {
  margin: 0;
  max-width: 34rem;
  color: var(--muted);
}

form { margin-top: 2rem; max-width: 34rem; }

label { display: block; margin-bottom: 0.5rem; font-weight: 600; }

.row { display: flex; flex-wrap: wrap; gap: 0.75rem; }

input[type="email"] {
  flex: 1 1 15rem;
  min-width: 0;
  height: 3.25rem;
  padding: 0 1rem;
  font: inherit;
  color: var(--ink);
  background: var(--field);
  border: 2px solid var(--line);
  border-radius: 0.75rem;
}

input[type="email"]:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-color: var(--accent);
}

button {
  height: 3.25rem;
  padding: 0 1.5rem;
  font: inherit;
  font-weight: 700;
  color: var(--on-accent);
  background: var(--accent);
  border: 0;
  border-radius: 0.75rem;
  cursor: pointer;
}

button:hover { filter: brightness(1.1); }

button:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }

.note { margin: 0.75rem 0 0; font-size: 0.9375rem; color: var(--muted); }

.person {
  margin: 3rem 0 0;
  padding-top: 1.5rem;
  max-width: 34rem;
  border-top: 1px solid var(--line);
  font-family: var(--display);
  font-weight: 600;
}

.back { margin-top: 1.5rem; }
.back a { color: var(--accent); font-weight: 600; }

footer .wrap { padding-block: 1rem 1.5rem; font-size: 0.9375rem; color: var(--muted); }

@media (min-width: 52rem) {
  .hero { grid-template-columns: 1fr 15rem; align-items: center; gap: 3rem; }
  .ripple { order: 2; width: 100%; justify-self: center; }
}