:root {
  color-scheme: dark;
  --bg: #07111f;
  --surface: #0d1b2b;
  --surface-strong: #132438;
  --text: #f4f7fb;
  --muted: #a9b7c8;
  --line: rgba(255, 255, 255, 0.13);
  --cyan: #63e6d5;
  --blue: #74a7ff;
  --lime: #d7ff77;
  --max-width: 1160px;
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    radial-gradient(circle at 8% 2%, rgba(99, 230, 213, 0.14), transparent 31rem),
    radial-gradient(circle at 95% 28%, rgba(116, 167, 255, 0.12), transparent 34rem),
    var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", sans-serif;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-underline-offset: 0.2em;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 4px;
  border-radius: 6px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 1rem;
  border-radius: 999px;
  background: var(--lime);
  color: #07111f;
  font-weight: 800;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: relative;
  z-index: 10;
  display: flex;
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
  padding: 1.35rem 0;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 850;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  width: 2.15rem;
  height: 2.15rem;
  border-radius: 0.7rem;
  place-items: center;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  box-shadow: 0 0.5rem 1.5rem rgba(99, 230, 213, 0.18);
  color: #07111f;
  font-weight: 950;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 3vw, 2rem);
}

nav a {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
}

nav a:hover {
  color: var(--text);
}

.hero {
  display: grid;
  width: min(calc(100% - 2rem), var(--max-width));
  min-height: calc(100svh - 5rem);
  margin: 0 auto;
  padding: clamp(3rem, 8vw, 7.5rem) 0 clamp(5rem, 10vw, 9rem);
  grid-template-columns: minmax(0, 1.1fr) minmax(19rem, 0.75fr);
  align-items: center;
  gap: clamp(3rem, 8vw, 7rem);
}

.eyebrow {
  margin: 0 0 1.2rem;
  color: var(--cyan);
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.2em;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 11ch;
  margin: 0;
  font-size: clamp(3.25rem, 8vw, 6.9rem);
  font-weight: 900;
}

h1 span {
  display: inline-block;
  background: linear-gradient(100deg, var(--cyan), var(--blue));
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

.lead {
  max-width: 41rem;
  margin: 1.8rem 0 0;
  color: #d4dce7;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.hero-actions {
  display: flex;
  margin-top: 2.2rem;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.button {
  display: inline-flex;
  min-height: 3.2rem;
  padding: 0.85rem 1.3rem;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--lime);
  color: #07111f;
}

.button-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.045);
  color: var(--text);
}

.fine-print {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.brief-preview {
  position: relative;
  overflow: hidden;
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.17);
  border-radius: 2.5rem;
  background:
    linear-gradient(150deg, rgba(255, 255, 255, 0.08), transparent 36%),
    #0d1b2b;
  box-shadow: 0 2rem 7rem rgba(0, 0, 0, 0.38);
}

.brief-preview::after {
  position: absolute;
  right: -4rem;
  bottom: -6rem;
  width: 14rem;
  height: 14rem;
  border-radius: 50%;
  background: rgba(99, 230, 213, 0.13);
  content: "";
  filter: blur(0.2rem);
}

.preview-bar,
.preview-topic,
.preview-points,
.preview-voice {
  position: relative;
  z-index: 1;
}

.preview-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 850;
}

.status-pill {
  padding: 0.25rem 0.65rem;
  border: 1px solid rgba(99, 230, 213, 0.35);
  border-radius: 999px;
  color: var(--cyan);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

.preview-topic {
  margin-top: 3.5rem;
  color: var(--blue);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.brief-preview h2 {
  margin: 0.65rem 0 1.5rem;
  font-size: clamp(1.9rem, 4vw, 3.1rem);
}

.preview-rule {
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.preview-points {
  margin: 0.4rem 0 0;
}

.preview-points div {
  display: grid;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 2.4rem 1fr;
  gap: 0.6rem;
}

.preview-points dt {
  color: var(--cyan);
  font-size: 0.72rem;
  font-weight: 850;
}

.preview-points dd {
  display: flex;
  margin: 0;
  flex-direction: column;
}

.preview-points dd span {
  color: var(--muted);
  font-size: 0.82rem;
}

.preview-voice {
  display: flex;
  margin-top: 1.2rem;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  align-items: center;
  gap: 0.8rem;
  background: rgba(255, 255, 255, 0.04);
}

.voice-avatar {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 auto;
  border-radius: 0.8rem;
  place-items: center;
  background: var(--blue);
  color: #07111f;
  font-size: 0.75rem;
  font-weight: 900;
}

.preview-voice > span:last-child {
  display: flex;
  flex-direction: column;
}

.preview-voice strong {
  font-size: 0.85rem;
}

.preview-voice small {
  color: var(--muted);
  font-size: 0.72rem;
}

.section {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
  padding: clamp(4.5rem, 10vw, 8rem) 0;
}

.section-heading {
  display: grid;
  margin-bottom: 3rem;
  grid-template-columns: minmax(0, 1.1fr) minmax(16rem, 0.65fr);
  align-items: end;
  column-gap: 3rem;
}

.section-heading .eyebrow {
  grid-column: 1 / -1;
}

.section h2 {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 5rem);
  font-weight: 900;
}

.section-heading > p:last-child,
.responsible-ai > p {
  margin: 0;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card {
  min-height: 20rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(13, 27, 43, 0.72);
}

.feature-card-wide {
  grid-column: 1 / -1;
  min-height: 17rem;
  background:
    linear-gradient(110deg, rgba(99, 230, 213, 0.1), transparent 50%),
    rgba(13, 27, 43, 0.72);
}

.feature-card-accent {
  background:
    linear-gradient(145deg, rgba(215, 255, 119, 0.12), transparent 68%),
    rgba(13, 27, 43, 0.72);
}

.feature-number {
  color: var(--cyan);
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.feature-card h3 {
  max-width: 16ch;
  margin: 4rem 0 0.85rem;
  font-size: clamp(1.7rem, 3.5vw, 2.6rem);
}

.feature-card-wide h3 {
  margin-top: 2.5rem;
}

.feature-card p {
  max-width: 42rem;
  margin: 0;
  color: var(--muted);
}

.responsible-ai {
  display: grid;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  grid-template-columns: minmax(0, 1fr) minmax(16rem, 0.75fr);
  align-items: end;
  gap: 3rem;
}

.responsible-ai h2 {
  max-width: 14ch;
  font-size: clamp(2.3rem, 5vw, 4.2rem);
}

.english-section {
  margin-top: clamp(4rem, 8vw, 7rem);
  margin-bottom: clamp(4rem, 8vw, 7rem);
  padding: clamp(2rem, 7vw, 5rem);
  border: 1px solid var(--line);
  border-radius: clamp(1.5rem, 5vw, 3rem);
  background:
    radial-gradient(circle at 85% 5%, rgba(116, 167, 255, 0.16), transparent 26rem),
    var(--surface);
}

.english-section h2 {
  max-width: 13ch;
}

.english-lead {
  max-width: 48rem;
  margin: 1.4rem 0 3rem;
  color: #d4dce7;
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.english-grid {
  display: grid;
  margin-bottom: 2rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.english-grid article {
  padding: 1.35rem;
  border-top: 1px solid var(--line);
}

.english-grid h3 {
  margin: 0 0 0.45rem;
  font-size: 1.25rem;
}

.english-grid p,
.accuracy-note {
  margin: 0;
  color: var(--muted);
}

.accuracy-note {
  max-width: 48rem;
  margin-bottom: 2rem;
  font-size: 0.88rem;
}

footer {
  display: grid;
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--line);
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 2rem;
}

footer p {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.footer-links {
  display: flex;
  align-items: flex-end;
  flex-direction: column;
  gap: 0.55rem;
}

.footer-links a {
  color: var(--muted);
  font-size: 0.85rem;
}

.copyright {
  grid-column: 1 / -1;
}

.privacy-page {
  background:
    radial-gradient(circle at 84% 0, rgba(116, 167, 255, 0.12), transparent 34rem),
    var(--bg);
}

.policy-shell {
  width: min(calc(100% - 2rem), 940px);
  margin: 0 auto;
  padding: clamp(3.5rem, 8vw, 7rem) 0 clamp(5rem, 10vw, 9rem);
}

.policy-intro {
  padding-bottom: clamp(3.5rem, 8vw, 6rem);
}

.policy-intro h1 {
  max-width: 13ch;
  font-size: clamp(2.8rem, 8vw, 6rem);
}

.policy-intro > p:last-child {
  margin: 1.2rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.policy {
  margin-bottom: clamp(5rem, 11vw, 9rem);
}

.policy-language {
  display: flex;
  padding: 1.25rem 0;
  border-top: 2px solid var(--text);
  border-bottom: 1px solid var(--line);
  align-items: center;
  justify-content: space-between;
}

.policy-language span {
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.16em;
}

.policy-language h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.7rem);
}

.policy section {
  display: grid;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: minmax(13rem, 0.42fr) minmax(0, 1fr);
  column-gap: clamp(2rem, 7vw, 5rem);
}

.policy section h3 {
  margin: 0;
  font-size: 1.18rem;
}

.policy section > :not(h3) {
  grid-column: 2;
}

.policy section p {
  margin: 0 0 1rem;
  color: #cbd5e1;
}

.policy section p:last-child {
  margin-bottom: 0;
}

.policy ul {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  color: #cbd5e1;
}

.policy li + li {
  margin-top: 0.55rem;
}

.policy a {
  color: var(--cyan);
}

.link-list {
  list-style: none;
  padding-left: 0 !important;
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
  }

  nav {
    gap: 0.75rem;
  }

  nav a {
    font-size: 0.76rem;
  }

  nav a:first-child {
    display: none;
  }

  .hero {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .hero-copy {
    padding-top: 2rem;
  }

  .brief-preview {
    width: min(100%, 31rem);
    justify-self: center;
  }

  .section-heading,
  .responsible-ai {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .feature-grid,
  .english-grid {
    grid-template-columns: 1fr;
  }

  .feature-card-wide {
    grid-column: auto;
  }

  .feature-card {
    min-height: 17rem;
  }

  .policy section {
    grid-template-columns: 1fr;
    row-gap: 1.25rem;
  }

  .policy section > :not(h3) {
    grid-column: 1;
  }

  footer {
    grid-template-columns: 1fr;
  }

  .footer-links {
    align-items: flex-start;
  }

  .copyright {
    grid-column: 1;
  }
}

@media (max-width: 430px) {
  .site-header {
    width: min(calc(100% - 1.25rem), var(--max-width));
  }

  .brand > span:last-child {
    display: none;
  }

  .footer-brand > span:last-child,
  .footer-brand {
    display: inline-flex;
  }

  .hero,
  .section,
  .policy-shell,
  footer {
    width: min(calc(100% - 1.25rem), var(--max-width));
  }

  h1 {
    font-size: clamp(2.85rem, 17vw, 4.2rem);
  }

  .button {
    width: 100%;
  }

  .english-section {
    width: calc(100% - 1.25rem);
    padding: 1.5rem;
  }

  .policy-intro h1 {
    font-size: clamp(2.45rem, 15vw, 3.9rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button {
    transition: none;
  }
}