:root {
  color-scheme: light;
  --ink: #20243a;
  --muted: #6d6695;
  --paper: #f9f8fc;
  --line: #e9e8f0;
  --accent: #4c31ee;
  --accent-hover: #3516ec;
}

* { box-sizing: border-box; }

html { min-height: 100%; }

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
  border-radius: 2px;
}

.site-shell {
  display: flex;
  flex-direction: column;
  width: min(100% - 48px, 640px);
  min-height: 100vh;
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 100px;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  color: #3516ec;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  text-decoration: none;
  white-space: nowrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.beta-tag {
  padding: 2px 8px;
  border-radius: 999px;
  background: #ebe7fd;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.02em;
  line-height: 1.5;
}

.nav-link {
  text-decoration-color: #aaa5c4;
  text-underline-offset: 4px;
  color: var(--muted);
  font-size: 0.93rem;
}

.nav-link:hover { color: var(--accent); }

.home-main,
.join-main {
  width: min(100%, 640px);
  margin-inline: auto;
  padding-block: clamp(72px, 12vh, 142px) 100px;
}

.home-main { flex: 1; }

.home-main .lead {
  margin-top: 0;
  font-weight: 400;
  letter-spacing: normal;
}

.join-main {
  padding-top: clamp(44px, 7vh, 84px);
}

h1 {
  max-width: 800px;
  margin: 0;
  font-size: clamp(2.8rem, 6vw, 5.2rem);
  font-weight: 690;
  letter-spacing: -0.062em;
  line-height: 1.07;
}

.lead {
  max-width: 700px;
  margin: 34px 0 0;
  color: var(--muted);
  font-size: clamp(1.12rem, 2vw, 1.35rem);
  line-height: 1.65;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px 32px;
  margin-top: 42px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 8px 16px;
  border-radius: 14px;
  background: var(--accent);
  color: white;
  font-size: 1rem;
  font-weight: 650;
  line-height: 1.5;
  text-decoration: none;
  transition: background 150ms ease, transform 150ms ease;
}

.button:hover { background: var(--accent-hover); transform: translateY(-1px); }

.form-section h1 {
  margin: 0 0 24px;
  font-size: 1.28rem;
  font-weight: 680;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.request-form {
  display: block;
  width: 100%;
  min-height: 660px;
  border: 0;
}

.form-fallback {
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
  margin: 12px 0 0;
}

.form-fallback a { text-underline-offset: 3px; }

@media (max-width: 640px) {
  .site-shell { width: min(100% - 36px, 640px); }
  .site-header { min-height: 78px; }
  .home-main, .join-main { padding-block: 72px 72px; }
  .join-main { padding-top: 48px; }
  .lead { margin-top: 26px; }
  .actions { align-items: stretch; flex-direction: column; margin-top: 34px; }
  .button { width: 100%; }
}