:root {
  --bg: #fafaf8;
  --fg: #111;
  --muted: #555;
  --accent: #111;
  --accent-fg: #fff;
  --border: #d8d6d0;
  --error: #b91c1c;
  --ok: #166534;
  --radius: 10px;
  --max: 560px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0e0e;
    --fg: #f4f4f2;
    --muted: #a8a8a4;
    --accent: #f4f4f2;
    --accent-fg: #0e0e0e;
    --border: #2a2a2a;
    --error: #fca5a5;
    --ok: #86efac;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 22px 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 56px;
}

.logo {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  background: var(--accent);
  color: var(--accent-fg);
  border-radius: 8px;
  font-weight: 700;
  font-size: 18px;
}

.brandname {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(28px, 6vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.lede {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 17px;
}

.signup {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.signup input[type="email"] {
  flex: 1 1 240px;
  min-width: 0;
  padding: 14px 14px;
  font-size: 16px;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  outline: none;
}

.signup input[type="email"]:focus {
  border-color: var(--fg);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.08);
}

.signup button {
  flex: 0 0 auto;
  padding: 14px 18px;
  font-size: 16px;
  font-weight: 600;
  background: var(--accent);
  color: var(--accent-fg);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.signup button:hover { opacity: 0.92; }
.signup button:disabled { opacity: 0.6; cursor: not-allowed; }

.submit-spinner {
  display: none;
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.signup.is-loading .submit-label { opacity: 0.6; }
.signup.is-loading .submit-spinner { display: inline-block; }

@keyframes spin { to { transform: rotate(360deg); } }

.status {
  min-height: 1.2em;
  margin: 12px 2px 0;
  font-size: 14px;
  color: var(--muted);
}
.status.is-error { color: var(--error); }
.status.is-ok { color: var(--ok); }

.proof {
  list-style: none;
  padding: 0;
  margin: 36px 0 0;
  color: var(--muted);
  font-size: 14.5px;
}
.proof li { padding: 6px 0; border-top: 1px solid var(--border); }
.proof li:last-child { border-bottom: 1px solid var(--border); }

.success {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--bg);
}
.success h2 { margin: 0 0 8px; font-size: 22px; letter-spacing: -0.01em; }
.success p { margin: 0 0 8px; color: var(--muted); }
.referral-hint { font-size: 14px; }

footer {
  margin-top: 56px;
  color: var(--muted);
  font-size: 13px;
}
footer a { color: inherit; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}