:root {
  --scl-bg: #121212;
  --scl-bg2: #1e1e1e;
  --scl-accent: #ccff00;
  --scl-text: #ffffff;
  --scl-muted: #b0b0b0;
  --scl-border: rgba(204, 255, 0, 0.22);
  --scl-border-soft: rgba(255, 255, 255, 0.08);
  --scl-radius: 14px;
  --scl-max: 1160px;
}

.scl-landing-body {
  background: var(--scl-bg);
  color: var(--scl-text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

.scl-landing-body,
.scl-landing-body * {
  box-sizing: border-box;
}

.scl-landing-body a {
  color: inherit;
}

.scl-landing {
  min-height: 100vh;
}

.scl-container {
  width: 100%;
  max-width: var(--scl-max);
  margin: 0 auto;
  padding: 0 20px;
}

.scl-eyebrow {
  color: var(--scl-muted);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.scl-h1,
.scl-h2,
.scl-h3 {
  font-family: "Helvetica Neue", "Inter", "Roboto Condensed", Arial, sans-serif;
  text-transform: uppercase;
  font-style: italic;
  letter-spacing: 0.04em;
  margin: 0;
}

.scl-h1 {
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1.05;
}

.scl-h2 {
  font-size: clamp(26px, 2.7vw, 38px);
  line-height: 1.15;
}

.scl-h3 {
  font-size: 18px;
  line-height: 1.2;
}

.scl-lead {
  color: var(--scl-muted);
  font-size: 16px;
  line-height: 1.7;
  max-width: 68ch;
  margin: 14px 0 0;
}

.scl-accent {
  color: var(--scl-accent);
}

.scl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 140ms ease, background-color 140ms ease, color 140ms ease, border-color 140ms ease;
  white-space: nowrap;
}

.scl-btn:focus-visible {
  outline: 2px solid var(--scl-accent);
  outline-offset: 3px;
}

.scl-btn:hover {
  transform: translateY(-1px);
}

.scl-btn--solid {
  background: var(--scl-accent);
  color: #000;
  border-color: rgba(0, 0, 0, 0.25);
}

.scl-btn--solid:hover {
  background: transparent;
  color: var(--scl-accent);
  border-color: var(--scl-accent);
}

.scl-btn--ghost {
  background: transparent;
  color: var(--scl-text);
  border-color: var(--scl-border-soft);
}

.scl-btn--ghost:hover {
  background: var(--scl-accent);
  color: #000;
  border-color: var(--scl-accent);
}

.scl-btn--outline {
  background: transparent;
  color: var(--scl-accent);
  border-color: var(--scl-accent);
}

.scl-btn--outline:hover {
  background: var(--scl-accent);
  color: #000;
}

.scl-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(18, 18, 18, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--scl-border-soft);
}

.scl-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 16px;
}

.scl-logo {
  font-family: "Helvetica Neue", "Inter", "Roboto Condensed", Arial, sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-style: italic;
  font-weight: 800;
  font-size: 14px;
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}

.scl-nav__links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
}

.scl-nav__links a {
  color: var(--scl-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding: 8px 0;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 12px;
}

.scl-nav__links a:hover {
  color: var(--scl-text);
  border-bottom-color: var(--scl-accent);
}

.scl-nav__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.scl-nav__toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--scl-border-soft);
  background: transparent;
  color: var(--scl-text);
}

.scl-nav__toggle:focus-visible {
  outline: 2px solid var(--scl-accent);
  outline-offset: 3px;
}

.scl-nav__mobile {
  display: none;
  border-top: 1px solid var(--scl-border-soft);
}

.scl-nav__mobile-inner {
  padding: 14px 0 18px;
  display: grid;
  gap: 12px;
}

.scl-nav__mobile a {
  color: var(--scl-text);
  text-decoration: none;
  padding: 10px 12px;
  border: 1px solid var(--scl-border-soft);
  border-radius: 12px;
}

.scl-nav__mobile a:hover {
  border-color: var(--scl-accent);
}

.scl-nav.is-open .scl-nav__mobile {
  display: block;
}

.scl-hero {
  background: radial-gradient(1200px 540px at 22% 18%, rgba(30, 30, 30, 0.9) 0%, rgba(18, 18, 18, 1) 55%, rgba(0, 0, 0, 1) 100%);
  position: relative;
  overflow: hidden;
}

.scl-hero::before {
  content: "";
  position: absolute;
  inset: -1px;
  background:
    linear-gradient(to right, rgba(204, 255, 0, 0.16) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(204, 255, 0, 0.08) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.16;
  pointer-events: none;
}

.scl-hero__inner {
  padding: 78px 0 56px;
  position: relative;
}

.scl-hero__meta {
  display: grid;
  gap: 14px;
}

.scl-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.scl-section {
  padding: 70px 0;
}

#the-science,
#the-app,
#founder,
#book-demo {
  scroll-margin-top: 92px;
}

.scl-cards {
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.scl-card {
  border: 1px solid var(--scl-border-soft);
  border-radius: var(--scl-radius);
  padding: 18px 18px 16px;
  background: rgba(255, 255, 255, 0.02);
}

.scl-card__kicker {
  color: var(--scl-accent);
  text-transform: uppercase;
  font-weight: 900;
  letter-spacing: 0.14em;
  font-size: 12px;
  margin-bottom: 10px;
}

.scl-card p {
  margin: 10px 0 0;
  color: var(--scl-muted);
  line-height: 1.7;
}

.scl-product {
  background: var(--scl-bg2);
  border-top: 1px solid var(--scl-border-soft);
  border-bottom: 1px solid var(--scl-border-soft);
}

.scl-product__grid {
  margin-top: 28px;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 22px;
  align-items: start;
}

.scl-shot {
  border: 1px solid var(--scl-border);
  border-radius: var(--scl-radius);
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(135deg, rgba(204, 255, 0, 0.12), rgba(255, 255, 255, 0.03)),
    rgba(0, 0, 0, 0.35);
  display: grid;
  place-items: center;
  color: var(--scl-muted);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.scl-features {
  display: grid;
  gap: 14px;
}

.scl-feature {
  border: 1px solid var(--scl-border-soft);
  border-radius: var(--scl-radius);
  padding: 14px 14px 12px;
  background: rgba(0, 0, 0, 0.25);
}

.scl-feature strong {
  display: block;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-style: italic;
}

.scl-feature span {
  display: block;
  margin-top: 8px;
  color: var(--scl-muted);
  line-height: 1.7;
}

.scl-founder__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 22px;
  align-items: center;
  margin-top: 26px;
}

.scl-portrait {
  border: 1px solid var(--scl-border);
  border-radius: var(--scl-radius);
  aspect-ratio: 4 / 5;
  background:
    linear-gradient(180deg, rgba(204, 255, 0, 0.12), rgba(255, 255, 255, 0.03)),
    rgba(0, 0, 0, 0.35);
  display: grid;
  place-items: center;
  color: var(--scl-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.scl-form {
  margin-top: 26px;
  border: 1px solid var(--scl-border-soft);
  border-radius: var(--scl-radius);
  padding: 18px;
  background: rgba(255, 255, 255, 0.02);
}

.scl-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.scl-field {
  display: grid;
  gap: 8px;
}

.scl-field label {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--scl-muted);
  font-weight: 800;
}

.scl-field input,
.scl-field select,
.scl-field textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--scl-border-soft);
  background: rgba(0, 0, 0, 0.35);
  color: var(--scl-text);
  padding: 12px 12px;
  font: inherit;
}

.scl-field textarea {
  min-height: 120px;
  resize: vertical;
}

.scl-field input:focus,
.scl-field select:focus,
.scl-field textarea:focus {
  outline: 2px solid rgba(204, 255, 0, 0.55);
  outline-offset: 2px;
  border-color: rgba(204, 255, 0, 0.55);
}

.scl-alert {
  border-radius: 12px;
  padding: 12px 12px;
  font-weight: 700;
  border: 1px solid var(--scl-border-soft);
  margin-top: 14px;
}

.scl-alert--success {
  border-color: rgba(204, 255, 0, 0.5);
  background: rgba(204, 255, 0, 0.08);
}

.scl-alert--error {
  border-color: rgba(255, 87, 87, 0.55);
  background: rgba(255, 87, 87, 0.1);
}

.scl-footer {
  border-top: 1px solid var(--scl-border-soft);
  padding: 52px 0;
}

.scl-footer__grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: center;
}

.scl-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: flex-end;
}

.scl-footer__links a {
  color: var(--scl-muted);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 12px;
}

.scl-footer__links a:hover {
  color: var(--scl-text);
}

@media (max-width: 920px) {
  .scl-cards {
    grid-template-columns: 1fr;
  }

  .scl-product__grid {
    grid-template-columns: 1fr;
  }

  .scl-founder__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .scl-nav__links {
    display: none;
  }

  .scl-nav__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .scl-nav__actions .scl-btn--ghost {
    display: none;
  }

  .scl-form__row {
    grid-template-columns: 1fr;
  }

  .scl-footer__grid {
    grid-template-columns: 1fr;
  }

  .scl-footer__links {
    justify-content: flex-start;
  }
}