:root {
  --bg: #07070a;
  --bg-card: #111116;
  --ink: #f0ece4;
  --ink-dim: #9a9690;
  --ink-mute: #4a4642;
  --accent: oklch(78% 0.14 65);
  --line: rgba(255,255,255,0.08);
  --serif: 'Newsreader', Georgia, serif;
  --mono: 'JetBrains Mono', monospace;
  --sans: -apple-system, system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

/* Nav */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  position: relative; z-index: 10;
}
.nav-logo {
  font-family: var(--serif);
  font-size: 22px; font-weight: 500;
  letter-spacing: -0.01em;
  display: flex; align-items: center;
  color: var(--ink);
  text-decoration: none;
}
.nav-login {
  padding: 8px 18px;
  border-radius: 100px;
  border: 0.5px solid var(--line);
  color: var(--ink-dim);
  font-size: 13px;
  text-decoration: none;
  transition: color 150ms, border-color 150ms;
}
.nav-login:hover { color: var(--ink); border-color: rgba(255,255,255,0.2); }

/* Hero */
.hero {
  min-height: 100dvh;
  display: flex; flex-direction: column;
  background:
    radial-gradient(ellipse at 20% 20%, oklch(28% 0.1 30 / 0.6) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, oklch(22% 0.08 280 / 0.4) 0%, transparent 50%),
    var(--bg);
}
.hero-body {
  flex: 1;
  display: flex; flex-direction: column; justify-content: center;
  padding: 40px 24px 80px;
  max-width: 680px;
  margin: 0 auto; width: 100%;
}
.hero-eyebrow {
  font-family: var(--mono);
  font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.hero-title {
  font-family: var(--serif);
  font-size: clamp(42px, 8vw, 72px);
  font-weight: 400;
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.hero-title em {
  font-style: italic;
  color: var(--accent);
}
.hero-sub {
  font-family: var(--serif);
  font-size: clamp(16px, 2.5vw, 19px);
  line-height: 1.55;
  color: var(--ink-dim);
  margin-top: 24px;
  max-width: 480px;
  font-style: italic;
}
.hero-form {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-top: 36px;
}
.hero-form.center { justify-content: center; }
.hero-input {
  flex: 1 1 220px; min-width: 0;
  height: 52px; padding: 0 18px;
  background: rgba(255,255,255,0.06);
  border: 0.5px solid rgba(255,255,255,0.18);
  border-radius: 100px;
  font-size: 15px;
  color: var(--ink);
  font-family: var(--sans);
  outline: none;
  box-sizing: border-box;
  -webkit-appearance: none;
  transition: border-color 150ms;
}
.hero-input:focus { border-color: var(--accent); }
.hero-input::placeholder { color: var(--ink-mute); }
.hero-btn {
  height: 52px; padding: 0 28px;
  background: var(--accent);
  color: #1a1a22;
  font-size: 15px; font-weight: 700;
  border-radius: 100px;
  cursor: pointer;
  border: none;
  font-family: var(--sans);
  white-space: nowrap;
  transition: opacity 150ms;
}
.hero-btn:hover { opacity: 0.85; }
.hero-hint {
  margin-top: 14px;
  font-size: 12px; color: var(--ink-mute);
  font-family: var(--mono);
  letter-spacing: 0.02em;
}

/* Sections */
.container { max-width: 900px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-dark { background: rgba(255,255,255,0.02); border-top: 0.5px solid var(--line); border-bottom: 0.5px solid var(--line); }
.section-cta { padding: 100px 0; }
.section-h {
  font-family: var(--serif);
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}

/* Steps */
.steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: flex; gap: 24px; align-items: flex-start;
  padding: 28px 0;
  border-bottom: 0.5px solid var(--line);
}
.step:last-child { border-bottom: none; }
.step-num {
  font-family: var(--mono);
  font-size: 12px; letter-spacing: 0.08em;
  color: var(--accent);
  flex-shrink: 0; width: 32px;
  padding-top: 4px;
}
.step-body h3 {
  font-family: var(--serif);
  font-size: 22px; font-weight: 500;
  margin-bottom: 8px;
}
.step-body p {
  font-size: 15px; line-height: 1.6;
  color: var(--ink-dim);
}

/* Email preview */
.email-preview {
  max-width: 520px;
  border-radius: 16px;
  border: 0.5px solid rgba(255,255,255,0.12);
  background: #0e0e14;
  overflow: hidden;
  margin: 0 auto;
}
.ep-header {
  padding: 16px 20px;
  border-bottom: 0.5px solid var(--line);
  background: rgba(255,255,255,0.03);
}
.ep-from { font-family: var(--mono); font-size: 10px; color: var(--ink-mute); letter-spacing: 0.06em; }
.ep-subject { font-family: var(--serif); font-size: 17px; font-weight: 500; margin-top: 4px; }
.ep-body { padding: 20px; }
.ep-echo-label {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-family: var(--mono);
  font-size: 10px; letter-spacing: 0.06em;
  margin-bottom: 10px;
  background: rgba(255,255,255,0.05);
  border: 0.5px solid rgba(255,255,255,0.1);
}
.ep-year { color: oklch(75% 0.18 350); }
.ep-month { color: oklch(80% 0.14 145); }
.ep-text {
  font-family: var(--serif);
  font-size: 15px; line-height: 1.6;
  color: var(--ink-dim);
  font-style: italic;
}
.ep-reply {
  margin-top: 24px; padding-top: 16px;
  border-top: 0.5px dashed rgba(255,255,255,0.1);
  font-size: 13px; color: var(--ink-mute);
  font-family: var(--mono);
  font-style: italic;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.feature {
  padding: 22px;
  border-radius: 14px;
  border: 0.5px solid var(--line);
  background: var(--bg-card);
}
.feature-icon { width:32px; height:32px; margin-bottom:14px; color:var(--accent); display:block; }
.feature h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.feature p { font-size: 14px; line-height: 1.55; color: var(--ink-dim); }

/* CTA */
.cta-title {
  font-family: var(--serif);
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 36px;
  line-height: 1.15;
}

/* Footer */
.footer {
  border-top: 0.5px solid var(--line);
  padding: 48px 0 32px;
  margin-top: 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  flex-wrap: wrap;
}
.footer-brand {}
.footer-logo {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.footer-logo img { border-radius: 7px; }
.footer-tagline {
  font-family: var(--serif);
  font-size: 13px;
  color: var(--ink-mute);
  font-style: italic;
  max-width: 260px;
  line-height: 1.5;
}
.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 4px;
}
.footer-nav-title {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 4px;
}
.footer-link {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-dim);
  text-decoration: none;
  transition: color 150ms;
}
.footer-link:hover { color: var(--accent); }
.footer-bottom {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 0.5px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copy {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
}
.footer-heart {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
  font-style: italic;
}
@media (max-width: 600px) {
  .footer-inner { flex-direction: column; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
}

@media (max-width: 600px) {
  .hero-form { flex-direction: column; align-items: stretch; }
  .hero-input, .hero-btn { width: 100%; max-width: 100%; flex: none; }
  .step { gap: 16px; }
}