:root {
  color-scheme: light;
  --orange: #ff8a00;
  --amber: #e8c400;
  --green: #6ddc3c;
  --teal: #00c6a7;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --background: #ffffff;
  --surface: #f8fafc;
  --line: #e2e8f0;
  --gradient: linear-gradient(135deg, #ff8a00 0%, #e8c400 35%, #6ddc3c 65%, #00c6a7 100%);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text-primary);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

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

a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--teal) 68%, white);
  outline-offset: 4px;
  border-radius: 999px;
}

img {
  display: block;
  max-width: 100%;
}

.site-header,
.footer,
main > section {
  width: min(980px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--background) 96%, transparent);
  backdrop-filter: blur(14px);
}

.js .site-header {
  position: fixed;
  left: 50%;
  width: min(980px, calc(100% - 40px));
  margin-inline: 0;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transform: translateX(-50%) translateY(-110%);
  transition:
    transform 220ms cubic-bezier(0.16, 1, 0.3, 1),
    opacity 180ms ease,
    visibility 0s linear 220ms;
}

.js .site-header.is-visible {
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  transition-delay: 0s;
}

main > section {
  scroll-margin-top: 96px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 700;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  object-fit: cover;
  background: #ffffff;
}

.nav-links,
.footer nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--text-secondary);
  font-size: 0.94rem;
  font-weight: 500;
}

.nav-links a,
.quiet-link {
  transition: color 160ms ease;
}

.nav-links a:hover,
.quiet-link:hover {
  color: var(--text-primary);
}

.hero {
  display: grid;
  justify-items: center;
  min-height: calc(82svh - 68px);
  padding: clamp(58px, 9vw, 104px) 0 clamp(48px, 8vw, 88px);
  text-align: center;
}

.hero-logo {
  width: clamp(104px, 14vw, 144px);
  height: auto;
  margin-bottom: 22px;
  border-radius: 28px;
  background: #ffffff;
  box-shadow: 0 18px 54px rgba(15, 23, 42, 0.08);
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--text-primary);
  letter-spacing: 0;
}

h1 {
  max-width: 760px;
  font-size: clamp(3rem, 6.2vw, 4.75rem);
  line-height: 1.04;
}

h2 {
  font-size: clamp(2rem, 4.5vw, 3.8rem);
  line-height: 1.08;
}

h3 {
  font-size: 1rem;
  line-height: 1.3;
}

.hero-copy {
  max-width: 640px;
  margin: 18px 0 0;
  color: var(--text-secondary);
  font-size: clamp(1.08rem, 2vw, 1.28rem);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  line-height: 1;
}

.button.primary {
  color: var(--text-primary);
  background: var(--gradient);
  box-shadow: 0 14px 32px rgba(0, 198, 167, 0.12);
}

.quiet-link {
  color: var(--text-secondary);
  font-weight: 700;
}

.proof {
  display: grid;
  grid-template-columns: minmax(260px, 0.58fr) minmax(520px, 1.12fr);
  gap: clamp(32px, 7vw, 76px);
  align-items: center;
  padding: 34px 0 clamp(84px, 12vw, 136px);
}

.proof-copy {
  max-width: 430px;
}

.proof-copy p,
.details p {
  margin: 18px 0 0;
  color: var(--text-secondary);
}

.chatgpt-proof {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.proof-panel {
  overflow: hidden;
  aspect-ratio: 640 / 853;
  border-radius: 10px;
  background: var(--surface);
}

.proof-panel img {
  width: 200%;
  max-width: none;
  height: auto;
}

.proof-panel-right img {
  transform: translateX(-50%);
}

.chatgpt-proof figcaption {
  grid-column: 1 / -1;
  margin-top: 4px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
}

.details {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1fr);
  gap: clamp(32px, 7vw, 76px);
  padding: clamp(72px, 11vw, 124px) 0;
  border-top: 1px solid var(--line);
}

.legal-page {
  width: min(760px, calc(100% - 40px));
  margin-inline: auto;
  padding: clamp(58px, 9vw, 104px) 0 clamp(72px, 11vw, 124px);
}

.legal-page h1 {
  max-width: 720px;
  font-size: clamp(2.7rem, 5.8vw, 4.4rem);
}

.legal-page h2 {
  margin-top: 42px;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.18;
}

.legal-page p {
  max-width: 70ch;
  margin: 16px 0 0;
  color: var(--text-secondary);
}

.legal-page a {
  color: var(--text-primary);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--teal) 52%, transparent);
  text-underline-offset: 3px;
}

.legal-kicker {
  margin-bottom: 12px;
  color: var(--text-secondary);
  font-weight: 700;
}

.details > div:first-child {
  max-width: 520px;
}

.detail-list {
  display: grid;
  gap: 18px;
}

.detail-list div {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.detail-list div:last-child {
  border-bottom: 0;
}

.detail-list p {
  margin-top: 6px;
}

.footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 30px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.footer p {
  margin: 0;
  text-align: center;
}

.footer nav {
  justify-content: flex-end;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: light;
  }
}

@media (max-width: 760px) {
  .site-header,
  .footer,
  main > section {
    width: min(100% - 28px, 980px);
  }

  .site-header {
    min-height: 62px;
  }

  .js .site-header {
    width: min(100% - 28px, 980px);
  }

  .nav-links {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 58px 0 44px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 14px;
  }

  .button {
    width: 100%;
  }

  .proof,
  .details,
  .footer {
    grid-template-columns: 1fr;
  }

  .proof {
    padding-bottom: 82px;
  }

  .chatgpt-proof {
    grid-template-columns: 1fr;
    margin-inline: -2px;
  }

  .chatgpt-proof figcaption {
    margin-inline: 2px;
  }

  .footer,
  .footer p,
  .footer nav {
    justify-items: start;
    justify-content: flex-start;
    text-align: left;
  }

  .footer nav {
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}