:root {
  --ink: #0b0d12;
  --blue: #2563eb;
  --chalk: #f8fafc;
  --slate: #94a3b8;
  --steel: #475569;
  --line: rgba(148, 163, 184, 0.28);
  --radius: 1.5rem;
  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  color: var(--ink);
  background: var(--chalk);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
}
a {
  color: inherit;
}
img {
  display: block;
  max-width: 100%;
}
.skip-link {
  position: fixed;
  z-index: 10;
  left: 1rem;
  top: -4rem;
  background: var(--chalk);
  color: var(--ink);
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
}
.skip-link:focus {
  top: 1rem;
}
.site-header,
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 76rem;
  margin: auto;
  padding: 1.25rem 1.25rem;
}
.site-header {
  color: var(--chalk);
  position: absolute;
  inset: 0 0 auto;
  z-index: 2;
}
.brand {
  display: flex;
  gap: 0.65rem;
  align-items: center;
  text-decoration: none;
  font-weight: 750;
  letter-spacing: -0.03em;
}
.brand img {
  width: 2rem;
}
.header-link {
  font-size: 0.9rem;
  color: var(--slate);
  text-underline-offset: 0.25rem;
}
.hero {
  background: var(--ink);
  color: var(--chalk);
  min-height: 46rem;
  overflow: hidden;
  padding: 8.5rem 1.25rem 3rem;
  display: grid;
  gap: 2.75rem;
  align-items: center;
}
.hero-copy,
.hero-device,
.section-intro,
.privacy-copy,
.privacy-points,
.details-grid,
.faq-list {
  max-width: 36rem;
  width: 100%;
  margin: auto;
}
.eyebrow {
  color: var(--steel);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}
.eyebrow span {
  display: inline-block;
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: var(--blue);
}
.eyebrow-blue {
  color: #bfdbfe;
}
.hero h1,
.section-intro h2,
.privacy-copy h2,
.closing h2 {
  font-size: clamp(3.2rem, 11vw, 6.75rem);
  letter-spacing: -0.07em;
  line-height: 0.9;
  margin: 0.85rem 0 1.4rem;
}
.lede {
  color: #cbd5e1;
  font-size: 1.1rem;
  line-height: 1.6;
  max-width: 32rem;
}
.actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 2rem 0 1rem;
}
.button {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 750;
  padding: 0.9rem 1.1rem;
  border-radius: 999px;
  transition:
    transform 0.2s,
    background 0.2s;
}
.button:hover {
  transform: translateY(-2px);
}
.button-primary {
  color: #fff;
  background: var(--blue);
}
.button-secondary {
  color: var(--chalk);
  border: 1px solid #334155;
}
.availability {
  color: var(--slate);
  font-size: 0.8rem;
}
.hero-device {
  position: relative;
  max-width: 21rem;
}
.hero-device:before {
  content: "";
  position: absolute;
  inset: -20% -35%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.48), transparent 65%);
  z-index: 0;
}
.hero-device img {
  position: relative;
  z-index: 1;
  border-radius: 2rem;
  border: 5px solid #1e293b;
  box-shadow: 0 2rem 4rem rgba(0, 0, 0, 0.35);
}
.principles {
  max-width: 76rem;
  margin: auto;
  display: grid;
  grid-template-columns: 1fr;
}
.principles article {
  padding: 2rem 1.25rem;
  border-bottom: 1px solid var(--line);
}
.principles span,
.card-number {
  font-family: "SF Mono", Monaco, monospace;
  color: var(--blue);
  font-size: 0.75rem;
}
.principles h2 {
  margin: 0.6rem 0;
  font-size: 1.3rem;
  letter-spacing: -0.04em;
}
.principles p {
  margin: 0;
  color: var(--steel);
  line-height: 1.5;
  font-size: 0.92rem;
}
.feature-section,
.details-section,
.faq-section {
  max-width: 76rem;
  margin: auto;
  padding: 6rem 1.25rem;
}
.section-intro {
  margin: 0 0 2.5rem;
}
.section-intro h2,
.privacy-copy h2 {
  font-size: clamp(2.4rem, 8vw, 4.7rem);
  margin: 0.7rem 0 1.2rem;
}
.section-intro > p:last-child {
  color: var(--steel);
  max-width: 35rem;
  line-height: 1.6;
}
.feature-grid {
  display: grid;
  gap: 1rem;
}
.feature-card {
  min-height: 27rem;
  overflow: hidden;
  border-radius: var(--radius);
  padding: 1.5rem;
  position: relative;
}
.feature-card h3 {
  font-size: 1.7rem;
  letter-spacing: -0.05em;
  margin: 0.75rem 0;
  max-width: 16rem;
}
.feature-card > p:not(.card-number) {
  max-width: 20rem;
  line-height: 1.5;
  font-size: 0.92rem;
}
.feature-card img {
  position: absolute;
  right: -10%;
  bottom: -20%;
  width: 75%;
  border-radius: 1.35rem;
  box-shadow: 0 1.25rem 2.5rem rgba(0, 0, 0, 0.25);
}
.feature-card-dark {
  background: #162031;
  color: #f8fafc;
}
.feature-card-dark > p:not(.card-number) {
  color: #cbd5e1;
}
.feature-card-blue {
  background: var(--blue);
  color: white;
}
.feature-card-blue .card-number {
  color: #bfdbfe;
}
.feature-card-light {
  background: #e8edf5;
  color: var(--ink);
}
.metric-demo {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  padding: 1.1rem;
  width: 70%;
  background: rgba(11, 13, 18, 0.23);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 1rem;
  display: grid;
  gap: 0.25rem;
}
.metric-demo strong {
  font-family: "SF Mono", Monaco, monospace;
  font-size: 2.5rem;
  letter-spacing: -0.08em;
}
.metric-demo span {
  color: #dbeafe;
}
.metric-demo i {
  margin-top: 0.5rem;
  font-style: normal;
  color: #bfdbfe;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
}
.privacy-section {
  background: var(--ink);
  color: var(--chalk);
  padding: 6rem 1.25rem;
  display: grid;
  gap: 3rem;
}
.privacy-copy p:not(.eyebrow) {
  color: #cbd5e1;
  line-height: 1.65;
}
.text-link {
  color: #93c5fd;
  font-weight: 700;
  text-underline-offset: 0.3rem;
}
.privacy-points {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 1.4rem;
}
.privacy-points li {
  padding-top: 1.2rem;
  border-top: 1px solid #334155;
  display: grid;
  gap: 0.4rem;
}
.privacy-points strong {
  font-size: 1.05rem;
}
.privacy-points span {
  color: var(--slate);
  line-height: 1.5;
  font-size: 0.92rem;
}
.details-section {
  padding-bottom: 3rem;
}
.details-grid {
  display: grid;
  gap: 1rem;
}
.details-grid article {
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.4rem;
}
.details-grid h3 {
  margin: 0 0 0.6rem;
  letter-spacing: -0.04em;
}
.details-grid p {
  color: var(--steel);
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.55;
}
.faq-section {
  padding-top: 3rem;
}
.faq-list {
  display: grid;
  gap: 0.5rem;
}
details {
  border-bottom: 1px solid var(--line);
  padding: 1.1rem 0;
}
summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
summary:after {
  content: "+";
  color: var(--blue);
  font-size: 1.35rem;
  line-height: 0.8;
}
details[open] summary:after {
  content: "−";
}
details p {
  color: var(--steel);
  line-height: 1.55;
}
details a {
  color: var(--blue);
  font-size: 0.9rem;
  font-weight: 700;
}
.closing {
  color: var(--chalk);
  background: linear-gradient(135deg, #111827, var(--ink));
  text-align: center;
  padding: 6rem 1.25rem;
}
.closing img {
  margin: 0 auto 2.5rem;
}
.closing .eyebrow {
  justify-content: center;
  color: #94a3b8;
}
.closing h2 {
  font-size: clamp(3rem, 10vw, 5.5rem);
}
.closing > p:not(.eyebrow) {
  color: #cbd5e1;
  margin: -0.5rem auto 2rem;
  max-width: 25rem;
  line-height: 1.5;
}
.site-footer {
  color: var(--steel);
  font-size: 0.8rem;
  flex-wrap: wrap;
  gap: 1rem;
}
.site-footer p {
  margin: 0;
}
.site-footer nav {
  display: flex;
  gap: 1rem;
}
.site-footer a {
  text-underline-offset: 0.25rem;
}
.privacy-header {
  position: static;
  background: var(--ink);
}
.privacy-page {
  max-width: 47rem;
  margin: auto;
  padding: 4rem 1.25rem 5rem;
}
.privacy-page h1 {
  font-size: clamp(2.8rem, 10vw, 5rem);
  letter-spacing: -0.07em;
  line-height: 0.93;
  margin: 0.8rem 0 1.4rem;
}
.privacy-page .intro {
  color: var(--steel);
  font-size: 1.15rem;
  line-height: 1.65;
}
.privacy-page section {
  margin: 3rem 0;
}
.privacy-page h2 {
  font-size: 1.5rem;
  letter-spacing: -0.04em;
  margin-bottom: 0.65rem;
}
.privacy-page h3 {
  font-size: 1rem;
  margin: 1.5rem 0 0.4rem;
}
.privacy-page p,
.privacy-page li {
  color: var(--steel);
  line-height: 1.65;
}
.privacy-page li {
  margin: 0.5rem 0;
}
.privacy-page a:not(.button) {
  color: var(--blue);
  text-underline-offset: 0.2rem;
}
.error-page {
  min-height: 100svh;
  display: grid;
  place-content: center;
}
.error-page h1 {
  font-size: clamp(3rem, 10vw, 5.5rem);
  letter-spacing: -0.07em;
  line-height: 0.9;
  margin: 0.75rem 0 1rem;
}
@media (min-width: 680px) {
  .site-header,
  .site-footer {
    padding-inline: 2.5rem;
  }
  .hero {
    padding: 9rem 2.5rem 4rem;
    grid-template-columns: minmax(0, 1fr) minmax(17rem, 24rem);
  }
  .hero-copy {
    margin-left: auto;
  }
  .hero-device {
    margin-right: auto;
  }
  .principles {
    grid-template-columns: repeat(3, 1fr);
  }
  .principles article {
    padding: 2.5rem;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }
  .principles article:last-child {
    border-right: 0;
  }
  .feature-section,
  .details-section,
  .faq-section {
    padding: 8rem 2.5rem;
  }
  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }
  .feature-card:first-child {
    grid-row: span 2;
    min-height: 35rem;
  }
  .feature-card {
    min-height: 18rem;
  }
  .feature-card-light img {
    width: 52%;
    right: 3%;
    bottom: -45%;
  }
  .privacy-section {
    padding: 8rem max(2.5rem, calc((100vw - 71rem) / 2));
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
  .details-grid {
    grid-template-columns: repeat(3, 1fr);
    max-width: none;
  }
  .faq-list {
    max-width: 47rem;
    margin-left: auto;
  }
  .closing {
    padding: 8rem 2rem;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .button {
    transition: none;
  }
}