:root {
  --bg: #fbfbf9;
  --fg: #1a1a18;
  --muted: #6b6b63;
  --accent: #2f6f5e;
  --line: #e2e2dc;
  --field: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12130f;
    --fg: #f2f2ec;
    --muted: #9a9a90;
    --accent: #7fc9b0;
    --line: #2c2e28;
    --field: #1a1c17;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
main { text-align: center; max-width: 34rem; width: 100%; }
h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(2.5rem, 9vw, 4.5rem);
  letter-spacing: -0.03em;
  font-weight: 600;
}
.dot { color: var(--accent); }
p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 3.5vw, 1.15rem);
  line-height: 1.6;
}
.tag {
  margin-top: 2rem;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
a { color: var(--accent); }
.cta {
  display: inline-block;
  margin-top: 2rem;
  font-size: 0.95rem;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}
.cta:hover { opacity: 0.7; }
form {
  margin-top: 2rem;
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}
input[type="email"] {
  flex: 1 1 16rem;
  min-width: 0;
  padding: 12px 14px;
  font: inherit;
  font-size: 1rem;
  color: var(--fg);
  background: var(--field);
  border: 1px solid var(--line);
  border-radius: 8px;
}
input[type="email"]:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: transparent;
}
button {
  padding: 12px 20px;
  font: inherit;
  font-size: 1rem;
  font-weight: 500;
  color: var(--bg);
  background: var(--accent);
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}
button:hover { opacity: 0.88; }
button[disabled] { opacity: 0.55; cursor: default; }
.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.msg {
  margin-top: 1.25rem;
  min-height: 1.4em;
  font-size: 0.95rem;
}
.msg.ok { color: var(--accent); }
.msg.err { color: #c0392b; }
@media (prefers-color-scheme: dark) { .msg.err { color: #ff8a7a; } }
.back {
  margin-top: 2.5rem;
  font-size: 0.85rem;
}
.back a { color: var(--muted); text-decoration: none; }
.back a:hover { color: var(--fg); }