:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-strong: #edf4ff;
  --text: #111827;
  --muted: #64748b;
  --line: #dfe6ef;
  --blue: #2f7df6;
  --blue-dark: #1f5fd2;
  --green: #18b95f;
  --red: #ef4444;
  --amber: #f59e0b;
  --shadow: 0 22px 70px rgba(31, 41, 55, 0.13);
  --radius: 8px;
}

:root[data-theme="dark"] {
  --bg: #0d1117;
  --surface: #151b23;
  --surface-strong: #101f33;
  --text: #f8fafc;
  --muted: #9aa8bb;
  --line: #263244;
  --blue: #5b9cff;
  --blue-dark: #7fb2ff;
  --green: #35d07f;
  --red: #ff6464;
  --amber: #ffb84d;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 76px;
  padding: 14px clamp(18px, 5vw, 72px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 76%, transparent);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 230px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand span:last-child {
  line-height: 1.15;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-weight: 800;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex: 1;
}

.site-nav a {
  padding: 9px 12px;
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 700;
}

.site-nav a:hover,
.site-nav a.active {
  background: color-mix(in srgb, var(--blue) 12%, transparent);
  color: var(--blue);
}

.nav-toggle,
.theme-toggle {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.nav-toggle {
  display: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 0.86fr);
  gap: clamp(36px, 7vw, 86px);
  align-items: center;
  min-height: calc(100vh - 76px);
  padding: clamp(46px, 8vw, 92px) clamp(18px, 5vw, 72px);
  overflow: hidden;
}

.hero-copy {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 20px;
  font-size: clamp(2.45rem, 6vw, 5.6rem);
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(1.9rem, 4vw, 3.35rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.12rem;
  line-height: 1.25;
}

.hero-text,
.page-hero p,
.split-section p {
  color: var(--muted);
  font-size: clamp(1.02rem, 2vw, 1.25rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  font-weight: 800;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

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

.button.primary {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
  box-shadow: 0 12px 28px color-mix(in srgb, var(--blue) 32%, transparent);
}

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

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.trust-row span {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 620px;
}

.phone-frame {
  width: min(100%, 290px);
  padding: 10px;
  border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  border-radius: 34px;
  background: color-mix(in srgb, var(--surface) 88%, #fff 12%);
  box-shadow: var(--shadow);
}

.phone-frame img {
  width: 100%;
  height: auto;
  border-radius: 26px;
  background: var(--surface);
}

.main-phone {
  width: min(100%, 335px);
  transform: rotate(2deg);
}

.floating-card {
  position: absolute;
  width: 210px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.16);
}

.floating-card strong,
.floating-card small,
.floating-card span {
  display: block;
}

.floating-card small,
.card-kicker {
  color: var(--muted);
}

.card-kicker {
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

.detection-card {
  top: 90px;
  left: 0;
}

.quick-card {
  right: 8px;
  bottom: 88px;
}

.section {
  padding: clamp(44px, 8vw, 92px) clamp(18px, 5vw, 72px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 30px;
}

.flow-grid,
.feature-grid,
.privacy-layout,
.contact-layout {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.flow-step,
.feature-card,
.privacy-card,
.contact-card,
.screenshot-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
}

.flow-step,
.feature-card,
.privacy-card,
.contact-card {
  padding: 24px;
}

.flow-step span,
.feature-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  border-radius: var(--radius);
  font-weight: 900;
}

.flow-step span,
.feature-icon.blue {
  background: color-mix(in srgb, var(--blue) 14%, transparent);
  color: var(--blue);
}

.feature-icon.green {
  background: color-mix(in srgb, var(--green) 14%, transparent);
  color: var(--green);
}

.feature-icon.amber {
  background: color-mix(in srgb, var(--amber) 16%, transparent);
  color: var(--amber);
}

.feature-icon.red {
  background: color-mix(in srgb, var(--red) 14%, transparent);
  color: var(--red);
}

.flow-step p,
.feature-card p,
.privacy-card p,
.contact-card p,
.screenshot-card p {
  color: var(--muted);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 1fr);
  gap: clamp(30px, 7vw, 80px);
  align-items: center;
}

.check-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 26px 0 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 30px;
  color: var(--text);
  font-weight: 700;
}

.check-list li::before {
  position: absolute;
  left: 0;
  color: var(--green);
  content: "✓";
}

.phone-pair {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

.phone-pair .phone-frame:first-child {
  width: min(48%, 270px);
}

.small-phone {
  width: min(43%, 230px);
  transform: translateY(42px);
}

.feature-band {
  background: color-mix(in srgb, var(--surface-strong) 58%, transparent);
}

.feature-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-grid.wide {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cta-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: clamp(18px, 5vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.cta-section h2 {
  margin-bottom: 0;
}

.page-hero {
  max-width: 920px;
  padding: clamp(52px, 8vw, 100px) clamp(18px, 5vw, 72px) 24px;
}

.page-hero h1 {
  font-size: clamp(2.25rem, 5vw, 4.6rem);
}

.feature-phone {
  width: min(100%, 310px);
  justify-self: center;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}

.screenshot-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 18px;
}

.screenshot-card .phone-frame {
  width: 100%;
  max-width: 245px;
  margin: 0 auto;
  box-shadow: none;
}

.screenshot-card h2 {
  margin: 0;
  font-size: 1.2rem;
}

.hero-shot {
  grid-column: span 2;
  background: linear-gradient(135deg, color-mix(in srgb, var(--blue) 12%, var(--surface)), var(--surface));
}

.hero-shot .phone-frame {
  max-width: 310px;
}

.privacy-layout,
.contact-layout {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.accent-card {
  background: color-mix(in srgb, var(--blue) 12%, var(--surface));
}

.text-link {
  color: var(--blue);
  font-weight: 800;
}

.audience-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.audience-list span {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-weight: 800;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(18px, 5vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer p {
  margin: 0;
}

.site-footer div {
  display: flex;
  gap: 16px;
}

.site-footer a {
  font-weight: 800;
}

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .hero-visual {
    min-height: 560px;
  }

  .flow-grid,
  .feature-grid,
  .feature-grid.wide,
  .screenshot-grid,
  .privacy-layout,
  .contact-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .site-header {
    flex-wrap: wrap;
  }

  .brand {
    flex: 1;
    min-width: 0;
  }

  .nav-toggle {
    display: grid;
  }

  .site-nav {
    display: none;
    order: 4;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    padding-top: 8px;
  }

  .site-header.nav-open .site-nav {
    display: flex;
  }

  .site-nav a {
    padding: 12px;
  }

  .split-section {
    grid-template-columns: 1fr;
  }

  .cta-section {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 620px) {
  .hero,
  .section,
  .page-hero {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-visual {
    min-height: 520px;
  }

  .main-phone {
    width: min(82vw, 300px);
  }

  .floating-card {
    position: relative;
    inset: auto;
    width: 100%;
    margin-top: 12px;
  }

  .hero-visual {
    display: flex;
    flex-direction: column;
  }

  .flow-grid,
  .feature-grid,
  .feature-grid.wide,
  .screenshot-grid,
  .privacy-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hero-shot {
    grid-column: auto;
  }

  .phone-pair {
    align-items: flex-start;
  }

  .phone-pair .phone-frame:first-child,
  .small-phone {
    width: 48%;
  }

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

@media (max-width: 420px) {
  .brand span:last-child {
    font-size: 0.88rem;
  }

  .hero-actions .button {
    width: 100%;
  }
}