:root {
  --bg: #faf8f3;
  --bg-card: #ffffff;
  --ink: #1a1614;
  --ink-soft: #5a554f;
  --ink-faint: #94908a;
  --accent: #b8312c;
  --accent-soft: rgba(184, 49, 44, 0.08);
  --line: rgba(26, 22, 20, 0.08);
  --shadow: 0 1px 2px rgba(26, 22, 20, 0.04), 0 8px 24px rgba(26, 22, 20, 0.06);
  --serif: 'Cormorant Garamond', 'Iowan Old Style', Georgia, serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); }
body { font-family: var(--sans); font-size: 17px; line-height: 1.55; -webkit-font-smoothing: antialiased; }

main { max-width: 720px; margin: 0 auto; padding: 64px 24px 80px; }

/* HERO */
.hero { margin-bottom: 72px; }
.kicker {
  font-size: 12px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(40px, 7vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 0 0 28px;
  color: var(--ink);
}
.hero h1 em {
  font-style: italic;
  color: var(--accent);
  font-weight: 600;
}
.lead {
  font-size: 19px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0 0 36px;
  max-width: 580px;
}
.lead strong { color: var(--ink); font-weight: 600; }

/* SIGNUP */
.signup {
  display: grid; grid-template-columns: 1fr 1fr auto; gap: 8px;
  background: var(--bg-card);
  padding: 8px;
  border-radius: 14px;
  box-shadow: var(--shadow);
}
.signup input {
  border: 0; padding: 12px 14px; font: inherit; font-size: 15px;
  background: transparent; color: var(--ink); outline: none;
  border-radius: 8px;
}
.signup input:focus { background: var(--accent-soft); }
.signup input::placeholder { color: var(--ink-faint); }
.signup button {
  border: 0; padding: 12px 20px;
  background: var(--ink); color: white;
  border-radius: 8px; cursor: pointer;
  font: inherit; font-size: 14px; font-weight: 600;
  white-space: nowrap;
  transition: background 0.15s, transform 0.05s;
}
.signup button:hover { background: var(--accent); }
.signup button:active { transform: scale(0.98); }
.signup .btn-loading { display: none; }
.signup.is-loading .btn-default { display: none; }
.signup.is-loading .btn-loading { display: inline; }
.signup.is-success button { background: #2c7a3f; }

#signup-status {
  margin-top: 14px; font-size: 14px;
  min-height: 22px; color: var(--ink-soft);
}
#signup-status.error { color: var(--accent); }
#signup-status.success { color: #2c7a3f; }

.small { font-size: 13px; color: var(--ink-faint); margin-top: 18px; }

/* CURVE (3 arcs) */
.curve { margin-bottom: 80px; }
.curve h2 {
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 36px;
}
.curve-list { list-style: none; padding: 0; margin: 0; }
.curve-list li {
  display: flex; gap: 24px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}
.curve-list li:last-child { border-bottom: 1px solid var(--line); }
.curve-num {
  font-family: var(--serif);
  font-size: 48px;
  line-height: 1;
  font-weight: 600;
  color: var(--accent);
  width: 48px; flex-shrink: 0;
}
.curve-list h3 {
  margin: 0 0 4px;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
}
.curve-meta {
  font-size: 12px;
  color: var(--ink-faint);
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.curve-list p { margin: 0; color: var(--ink-soft); line-height: 1.55; }

/* SAMPLES */
.samples { margin-bottom: 80px; }
.samples h2 {
  font-family: var(--serif);
  font-size: 32px; font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 32px;
}
.sample {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 24px 28px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}
.sample-day {
  font-size: 11px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 8px;
}
.sample h3 {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 600;
  margin: 0 0 10px;
}
.sample p { margin: 0; color: var(--ink-soft); line-height: 1.6; }
.sample em { font-style: italic; color: var(--ink); font-weight: 500; }

/* CTA */
.cta {
  text-align: center;
  padding: 56px 32px;
  background: var(--ink);
  color: white;
  border-radius: 16px;
  margin-bottom: 60px;
}
.cta h2 {
  font-family: var(--serif);
  font-size: 36px; font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
  color: white;
}
.cta p { margin: 0 0 28px; color: rgba(255, 255, 255, 0.7); }
.cta-btn {
  display: inline-block;
  padding: 14px 32px;
  background: white;
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  border-radius: 8px;
  transition: transform 0.05s, background 0.15s;
}
.cta-btn:hover { background: var(--accent); color: white; }
.cta-btn:active { transform: scale(0.98); }

/* FOOTER */
footer {
  text-align: center;
  font-size: 13px;
  color: var(--ink-faint);
  margin-top: 40px;
}
footer a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}
footer a:hover { color: var(--accent); border-bottom-color: var(--accent); }

@media (max-width: 600px) {
  main { padding: 40px 20px 60px; }
  .signup { grid-template-columns: 1fr; }
  .signup input { padding: 14px; }
  .curve-list li { flex-direction: column; gap: 12px; }
  .curve-num { font-size: 36px; }
}