:root {
  --navy: #0B1220;
  --navy-alt: #0E1729;
  --teal: #2DD4BF;
  --teal-dim: #1F8A80;
  --ink: #E9EEF5;
  --ink-dim: #9FB0C3;
  --line: rgba(233, 238, 245, 0.10);
  --max: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--navy);
  color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.container.narrow { max-width: 720px; }

/* Nav */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: rgba(11, 18, 32, 0.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.12em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
  color: var(--ink-dim);
}

.nav-links a:hover { color: var(--ink); }

.nav-cta {
  color: var(--navy) !important;
  background: var(--teal);
  padding: 8px 16px;
  border-radius: 999px;
  font-weight: 600;
}

.nav-cta:hover { background: #5EE9D9; }

/* Hero */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(45, 212, 191, 0.16), transparent),
    var(--navy);
}

#waveform {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 760px;
  margin: 0 auto;
  padding: 140px 24px 100px;
  text-align: center;
}

.eyebrow {
  color: var(--teal);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 20px;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.05;
  margin-bottom: 24px;
}

.hero-sub {
  color: var(--ink-dim);
  font-size: 18px;
  max-width: 620px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--teal);
  color: var(--navy);
}

.btn-primary:hover { background: #5EE9D9; transform: translateY(-1px); }

.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover { border-color: var(--teal); color: var(--teal); }

/* Sections */
.section {
  padding: 96px 0;
  border-top: 1px solid var(--line);
}

.section.alt { background: var(--navy-alt); }

.kicker {
  color: var(--teal);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 14px;
}

.section h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  max-width: 640px;
}

.section-sub {
  color: var(--ink-dim);
  max-width: 560px;
  font-size: 17px;
  margin-top: 12px;
}

.bridge { padding: 72px 0; }

.lead {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.3rem, 2.6vw, 1.7rem);
  font-weight: 500;
  text-align: center;
  color: var(--ink);
  line-height: 1.4;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.step {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(233, 238, 245, 0.02);
}

.step-num {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  color: var(--teal);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 12px;
  letter-spacing: 0.08em;
}

.step h3 { font-size: 20px; }
.step p { color: var(--ink-dim); font-size: 15px; margin: 0; }

/* Offerings */
.offer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.offer-card {
  padding: 32px 28px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--navy);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.offer-card:hover {
  border-color: var(--teal-dim);
  transform: translateY(-2px);
}

.offer-card h3 { font-size: 21px; margin-bottom: 6px; }

.offer-tag {
  color: var(--teal);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 14px;
}

.offer-card p:last-child { color: var(--ink-dim); font-size: 15px; margin: 0; }

/* Founder */
.founder p { color: var(--ink-dim); font-size: 17px; }
.founder .quote {
  font-family: 'Space Grotesk', sans-serif;
  color: var(--ink);
  font-size: 22px;
  font-weight: 500;
  font-style: italic;
  margin-top: 32px;
}

/* Join / signup */
.join { text-align: center; }
.join .section-sub { margin-left: auto; margin-right: auto; }

.signup-form {
  display: flex;
  gap: 12px;
  max-width: 440px;
  margin: 32px auto 0;
  flex-wrap: wrap;
  justify-content: center;
}

.signup-form input {
  flex: 1 1 240px;
  padding: 14px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--navy);
  color: var(--ink);
  font-size: 15px;
  font-family: inherit;
}

.signup-form input:focus {
  outline: none;
  border-color: var(--teal);
}

.signup-form .btn { flex: 0 0 auto; }

.form-note { color: var(--ink-dim); font-size: 13px; margin-top: 14px; }

/* Footer */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--ink-dim);
  font-size: 13px;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-links { display: flex; gap: 20px; }
.footer-links a:hover { color: var(--teal); }

/* Responsive */
@media (max-width: 860px) {
  .nav-links { gap: 16px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .steps, .offer-grid { grid-template-columns: 1fr; }
  .hero-inner { padding: 120px 20px 72px; }
}