:root {
  color-scheme: light;
  --page: #f7f8fc;
  --surface: #ffffff;
  --surface-muted: #eef2f8;
  --text: #171b24;
  --muted: #5e6878;
  --line: #dce2eb;
  --blue: #0877e8;
  --blue-dark: #035fc2;
  --green: #087a45;
  --orange: #d65a22;
  --shadow: 0 14px 34px rgba(20, 37, 63, 0.09);
  font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 12px max(24px, calc((100vw - 1120px) / 2));
  border-bottom: 1px solid rgba(220, 226, 235, 0.85);
  background: rgba(247, 248, 252, 0.94);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 750;
  text-decoration: none;
}

.brand img {
  border-radius: 8px;
}

nav {
  display: flex;
  gap: 26px;
}

nav a,
footer a {
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 650;
  text-decoration: none;
}

nav a:hover,
nav a:focus-visible,
footer a:hover,
footer a:focus-visible {
  color: var(--blue-dark);
}

main {
  overflow: hidden;
}

.intro,
.capabilities,
.principles,
.privacy,
.support,
footer {
  width: min(1120px, calc(100% - 48px));
  margin-inline: auto;
}

.intro {
  min-height: 620px;
  padding: 82px 0 54px;
}

.app-icon {
  display: block;
  width: 112px;
  height: 112px;
  margin-bottom: 34px;
  border-radius: 24px;
  box-shadow: 0 18px 40px rgba(22, 105, 218, 0.25);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 20px;
  font-size: clamp(2.5rem, 6vw, 5.7rem);
  line-height: 1.02;
  letter-spacing: 0;
}

.intro-copy {
  max-width: 650px;
  margin-bottom: 32px;
  color: var(--muted);
  font-size: 1.22rem;
}

.intro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 50px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 750;
  text-decoration: none;
}

.button-primary {
  background: var(--blue);
  color: #ffffff;
  box-shadow: 0 10px 22px rgba(8, 119, 232, 0.2);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--blue-dark);
}

.button-secondary {
  border-color: var(--line);
  background: var(--surface);
  color: var(--text);
}

.trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  list-style: none;
}

.trust-list li::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--green);
}

.capabilities {
  padding: 76px 0 90px;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 0 72px;
  margin-bottom: 42px;
}

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

h2 {
  margin-bottom: 18px;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.section-heading > p:last-child,
.privacy > p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.08rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.feature {
  min-height: 220px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 8px 20px rgba(20, 37, 63, 0.05);
}

.feature-index {
  display: block;
  margin-bottom: 38px;
  color: var(--blue);
  font-size: 0.85rem;
  font-weight: 800;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.35rem;
  line-height: 1.25;
}

.feature p {
  margin-bottom: 0;
  color: var(--muted);
}

.principles {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 70px;
  padding: 72px;
  border-radius: 8px;
  background: #101927;
  color: #ffffff;
  box-shadow: var(--shadow);
}

.principles .eyebrow {
  color: #79b8ff;
}

.principle-list p {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.principle-list p:last-child {
  border-bottom: 0;
}

.principle-list span {
  color: #b9c3d2;
}

.privacy {
  padding: 100px 0;
}

.privacy p,
.privacy h2 {
  max-width: 760px;
}

.text-link {
  display: inline-block;
  margin-top: 10px;
  color: var(--blue-dark);
  font-weight: 800;
  text-decoration-thickness: 2px;
  text-underline-offset: 5px;
}

.support {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 46px;
  border: 1px solid #bbd8cb;
  border-radius: 8px;
  background: #eaf7f0;
}

.support h2 {
  margin-bottom: 0;
  font-size: clamp(1.8rem, 3.2vw, 2.7rem);
}

.support .eyebrow {
  color: var(--green);
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 72px;
  padding: 28px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

footer p {
  margin-bottom: 0;
}

@media (max-width: 760px) {
  .site-header {
    min-height: 64px;
    padding-inline: 20px;
  }

  nav {
    gap: 14px;
  }

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

  .intro,
  .capabilities,
  .principles,
  .privacy,
  .support,
  footer {
    width: min(100% - 32px, 1120px);
  }

  .intro {
    min-height: 560px;
    padding-top: 58px;
  }

  .app-icon {
    width: 88px;
    height: 88px;
    border-radius: 20px;
  }

  h1 {
    font-size: 3rem;
  }

  .section-heading,
  .feature-grid,
  .principles {
    grid-template-columns: 1fr;
  }

  .section-heading {
    gap: 0;
  }

  .feature {
    min-height: auto;
  }

  .feature-index {
    margin-bottom: 24px;
  }

  .principles {
    gap: 24px;
    padding: 34px 24px;
  }

  .principle-list p {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .privacy {
    padding: 76px 0;
  }

  .support,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .support .button {
    width: 100%;
  }
}

@media (max-width: 420px) {
  .brand span {
    display: none;
  }

  h1 {
    font-size: 2.55rem;
  }

  .intro-copy {
    font-size: 1.08rem;
  }

  .button {
    width: 100%;
  }
}

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