:root {
  --privacy-gradient: linear-gradient(110deg, #17103f, #342075);
  --font: "Inter", system-ui, sans-serif;
  --bg: #fbfbfe;
  --surface: #ffffff;
  --surface-soft: #f5f4ff;
  --text: #171529;
  --muted: #68657b;
  --border: #e6e3ef;
  --primary: #5637df;
  --primary-dark: #4328c5;
  --pink: #e94b9a;
  --shadow: 0 20px 55px rgba(38, 27, 91, 0.12);
  --radius: 22px;
}

body.dark-theme {
  --bg: #0d0c16;
  --surface: #171622;
  --surface-soft: #1c1930;
  --text: #f5f4ff;
  --muted: #aba8bd;
  --border: #302d41;
  --shadow: 0 20px 55px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
}

.section-shell {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

/* Sticky navigation and theme controls */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: 74px;
  padding: 0 max(24px, calc((100% - 1180px) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(18px);
}
.brand {
  display: inline-block;
  color: transparent;
  background: linear-gradient(105deg, #3027e8 5%, #7c2ee8 48%, #ec3d91 95%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -0.05em;
}
.brand span {
  color: inherit;
}
.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.site-nav {
  position: absolute;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 1.65rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  transform: translateX(-50%);
}
.site-nav > a {
  position: relative;
  transition: color 0.2s ease;
}
.site-nav > a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -0.55rem;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 999px;
  transform: translateX(-50%);
  transition: width 0.2s ease;
}
.site-nav > a:hover,
.site-nav > a.active {
  color: var(--primary);
}
.site-nav > a.active::after {
  width: 100%;
}
.landing-theme-toggle {
  position: relative;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  color: var(--text);
  background: transparent;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
}
.landing-theme-toggle input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}
.landing-theme-toggle svg {
  width: 21px;
  height: 21px;
  transition: transform 0.35s ease;
  transform: rotate(40deg);
  pointer-events: none;
}
.landing-theme-toggle .sunMoon {
  transform-origin: center;
  transition: transform 0.35s ease;
}
.landing-theme-toggle .sunRays {
  transform-origin: center;
  opacity: 0;
  transform: scale(0.65);
  transition:
    opacity 0.25s ease,
    transform 0.3s ease;
}
.landing-theme-toggle svg mask > circle {
  transition: transform 0.35s ease;
}
.landing-theme-toggle input:checked + svg {
  transform: rotate(90deg);
}
.landing-theme-toggle input:checked + svg mask > circle {
  transform: translate(16px, -3px);
}
.landing-theme-toggle input:checked + svg .sunMoon {
  transform: scale(0.62);
}
.landing-theme-toggle input:checked + svg .sunRays {
  opacity: 1;
  transform: scale(1);
}
.primary-button {
  padding: 0.9rem 1.25rem;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 0.65rem;
  color: white;
  background: linear-gradient(110deg, var(--primary), var(--pink));
  border-radius: 12px;
  box-shadow: none;
  font-weight: 700;
}
.primary-button:hover {
  transform: none;
  filter: none;
  box-shadow: none;
}
.primary-button i {
  transition: transform 0.22s ease;
}
.primary-button:hover i {
  transform: translateX(5px);
}
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  align-items: center;
  justify-content: center;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}
.menu-toggle i {
  font-size: 1.1rem;
  line-height: 1;
}

/* Hero and product preview */
.hero {
  min-height: 650px;
  padding-block: 82px 70px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 5rem;
}
.eyebrow {
  margin-bottom: 0.9rem;
  color: var(--primary);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}
.hero h1 {
  max-width: 690px;
  font-size: clamp(3rem, 6vw, 5.4rem);
  line-height: 1.02;
  letter-spacing: -0.065em;
}
.hero h1 span {
  display: block;
  color: transparent;
  background: linear-gradient(100deg, var(--primary), var(--pink));
  background-clip: text;
}
.hero-text {
  max-width: 650px;
  margin-top: 1.5rem;
  color: var(--muted);
  font-size: 1.12rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}
.secondary-button {
  padding: 0.9rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  font-weight: 700;
}
.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1.6rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
}
.trust-row span::first-letter {
  color: #16a34a;
}
.hero-visual {
  position: relative;
  min-height: 470px;
  display: grid;
  place-items: center;
}
.visual-glow {
  position: absolute;
  width: 410px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    rgba(86, 55, 223, 0.28),
    rgba(233, 75, 154, 0.25)
  );
  filter: blur(50px);
}
.qr-demo-card {
  position: relative;
  width: min(390px, 90%);
  padding: 1rem 2rem 2rem;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: var(--shadow);
  transform: rotate(2deg);
}
.demo-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 1rem;
  color: var(--muted);
  font-size: 0.75rem;
}
.demo-toolbar span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #d8d5e2;
}
.demo-toolbar b {
  margin-left: auto;
  font-weight: 600;
}
.demo-qr {
  display: block;
  width: 82%;
  margin: 0 auto;
  filter: drop-shadow(0 12px 20px rgba(86, 55, 223, 0.12));
}
.demo-options {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.65rem;
  margin-top: 1rem;
}
.swatch {
  width: 24px;
  height: 24px;
  border: 3px solid var(--surface);
  border-radius: 50%;
  box-shadow: 0 0 0 1px var(--border);
}
.purple {
  background: #5637df;
}
.pink {
  background: #e94b9a;
}
.blue {
  background: #4f8ff7;
}
.demo-pill {
  margin-left: 0.4rem;
  padding: 0.35rem 0.7rem;
  color: var(--muted);
  background: var(--surface-soft);
  border-radius: 99px;
  font-size: 0.72rem;
}

.trust-strip {
  min-height: 68px;
  padding: 1rem 3vw;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(1rem, 4vw, 4rem);
  color: var(--muted);
  background: var(--surface);
  border-block: 1px solid var(--border);
  font-size: 0.85rem;
  font-weight: 700;
}
.trust-strip i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: linear-gradient(var(--primary), var(--pink));
}
/* Shared landing-page sections and cards */
.content-section {
  padding-block: 80px;
}
.section-heading {
  max-width: 680px;
  margin: 0 auto 3.25rem;
  text-align: center;
}
.section-heading h2,
.showcase h2,
.privacy-card h2,
.faq-layout h2 {
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.13;
  letter-spacing: -0.045em;
}
.section-heading > p:last-child,
.showcase-copy > p,
.faq-layout > div > p {
  margin-top: 0.85rem;
  color: var(--muted);
}
.type-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.type-grid a {
  min-height: 210px;
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 8px 24px rgba(36, 27, 72, 0.04);
  transition: 0.25s ease;
}
.type-grid a:hover {
  transform: translateY(-5px);
  border-color: color-mix(in srgb, var(--primary) 45%, var(--border));
  box-shadow: var(--shadow);
}
.type-grid b,
.benefit-grid b {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: var(--primary);
  background: var(--surface-soft);
  border-radius: 12px;
  font-size: 1.2rem;
}
.type-grid h3 {
  margin-top: 1rem;
  font-size: 1.05rem;
}
.type-grid p,
.benefit-grid p,
.steps-grid p {
  margin-top: 0.45rem;
  color: var(--muted);
  font-size: 0.88rem;
}
.type-grid span {
  margin-top: auto;
  padding-top: 1rem;
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 700;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.steps-grid article {
  position: relative;
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
}
.steps-grid em {
  position: absolute;
  top: 1.3rem;
  right: 1.4rem;
  color: color-mix(in srgb, var(--primary) 18%, transparent);
  font-size: 2.8rem;
  font-weight: 800;
  font-style: normal;
}
.step-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: var(--primary);
  background: var(--surface-soft);
  border-radius: 12px;
  font-size: 1.2rem;
}
.steps-grid h3 {
  margin-top: 1.25rem;
}
/* Customization showcase */
.showcase {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  align-items: center;
  gap: 6rem;
}
.showcase-copy ul {
  margin: 1.6rem 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  list-style: none;
  color: var(--muted);
  font-size: 0.9rem;
}
.showcase-copy li > i,
.trust-row i,
.privacy-points i {
  margin-right: 0.35rem;
  color: #16a34a;
  font-size: 0.8em;
}
.text-link {
  color: var(--primary);
  font-weight: 800;
}
.feature-preview {
  position: relative;
  min-height: 400px;
  padding: 3rem;
  display: grid;
  place-items: center;
  background: var(--privacy-gradient);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 26px;
  box-shadow: 0 20px 50px rgba(23, 16, 63, 0.18);
}
.mini-code {
  width: 220px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  color: #342075;
  background: #fff;
  border: 20px solid #fff;
  border-radius: 25px;
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-indent: 0.04em;
  box-shadow: 0 20px 35px rgba(0, 0, 0, 0.2);
}
.preview-chip {
  position: absolute;
  top: 1.1rem;
  right: 1.1rem;
  padding: 0.5rem 0.8rem;
  color: white;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 99px;
  font-size: 0.75rem;
  backdrop-filter: blur(8px);
}
.preview-chip strong {
  color: #86efac;
}
.gradient-track {
  width: 75%;
  height: 8px;
  margin-top: 1rem;
  background: linear-gradient(90deg, #8b7cf6, #c4b5fd);
  border-radius: 99px;
}
.feature-controls {
  display: flex;
  gap: 8px;
}
.feature-controls span {
  width: 34px;
  height: 12px;
  border-radius: 10px;
  background: rgba(196, 181, 253, 0.7);
}
/* Privacy, benefits, and FAQ */
.privacy-section {
  padding: 36px 0 70px;
}
.privacy-card {
  padding: 2.5rem 3rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 2rem;
  color: white;
  background: var(--privacy-gradient);
  border-radius: 26px;
}
.privacy-icon {
  width: 66px;
  height: 66px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  font-size: 2rem;
}
.privacy-card p {
  color: #ccc6eb;
}
.privacy-card .eyebrow {
  color: #c4b5fd;
}
.privacy-points {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  color: #e9e6fa;
  font-size: 0.82rem;
  font-weight: 600;
}
.benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.benefit-grid article {
  padding: 1.6rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
}
.benefit-grid h3 {
  margin-top: 1rem;
}
.faq-layout {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 6rem;
  align-items: start;
}
.primary-button.compact {
  margin-top: 1.5rem;
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
}
.faq-list details {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
}
.faq-list summary {
  position: relative;
  padding-right: 2rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}
.faq-list summary::after {
  content: "\2b";
  position: absolute;
  right: 0;
  color: var(--primary);
  font-family: "Font Awesome 6 Free";
  font-size: 1rem;
  font-weight: 900;
}
.faq-list details[open] summary::after {
  content: "\f068";
}
.faq-list details p {
  padding-top: 0.7rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.site-footer {
  padding: 1.4rem 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.footer-inner {
  width: min(1180px, calc(100% - 40px));
  margin: auto;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 2rem;
  color: var(--muted);
  font-size: 0.82rem;
}
.footer-brand {
  display: inline-block;
  margin-bottom: 0.25rem;
}
.footer-links {
  display: flex;
  gap: 1.4rem;
}
.site-footer a:hover {
  color: var(--primary);
}

/* Responsive layout */
@media (max-width: 980px) {
  .site-header {
    padding-inline: 24px;
  }
  .menu-toggle {
    display: flex;
    cursor: pointer;
  }
  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    padding: 1.25rem 24px;
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    text-align: center;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: none;
  }
  .site-nav.open {
    display: flex;
  }
  .site-nav a {
    width: 100%;
    padding: 0.7rem;
    text-align: center;
  }
  .site-nav > a::after {
    bottom: 0.2rem;
  }
  .site-nav > a.active::after {
    width: 32px;
  }
  .hero {
    grid-template-columns: 1fr 0.8fr;
    gap: 2rem;
  }
  .type-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .showcase {
    gap: 3rem;
  }
  .privacy-card {
    grid-template-columns: auto 1fr;
  }
  .privacy-points {
    grid-column: 2;
  }
  .faq-layout {
    gap: 3rem;
  }
  .footer-inner {
    grid-template-columns: 1fr auto;
  }
  .footer-inner > p {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  .section-shell {
    width: min(100% - 28px, 620px);
  }
  .hero {
    min-height: auto;
    padding-block: 60px;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    text-align: center;
  }
  .hero-copy {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .hero h1 {
    font-size: clamp(2.7rem, 13vw, 4.3rem);
  }
  .hero-actions,
  .trust-row {
    justify-content: center;
  }
  .hero-visual {
    min-height: 390px;
  }
  .qr-demo-card {
    width: min(340px, 92%);
  }
  .visual-glow {
    width: 300px;
  }
  .trust-strip {
    overflow-x: auto;
    justify-content: flex-start;
    white-space: nowrap;
    padding-inline: 20px;
  }
  .content-section {
    padding-block: 72px;
  }
  .type-grid,
  .steps-grid,
  .benefit-grid {
    grid-template-columns: 1fr;
  }
  .type-grid a {
    min-height: 175px;
  }
  .showcase {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .showcase-copy ul {
    grid-template-columns: 1fr;
  }
  .feature-preview {
    min-height: 340px;
    padding: 2rem;
  }
  .mini-code {
    width: 180px;
  }
  .privacy-card {
    padding: 2rem;
    grid-template-columns: 1fr;
    text-align: center;
  }
  .privacy-icon {
    margin: auto;
  }
  .privacy-points {
    grid-column: 1;
    align-items: center;
  }
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-links {
    justify-content: center;
    flex-wrap: wrap;
  }
  .footer-inner > p {
    grid-column: auto;
  }
}

@media (max-width: 420px) {
  .site-header {
    min-height: 66px;
    padding-inline: 14px;
  }
  .hero {
    padding-top: 48px;
  }
  .hero-actions {
    width: 100%;
    flex-direction: column;
  }
  .hero-actions a {
    width: 100%;
  }
  .trust-row {
    gap: 0.65rem;
    font-size: 0.72rem;
  }
  .hero-visual {
    min-height: 330px;
  }
  .qr-demo-card {
    padding: 0.8rem 1.3rem 1.4rem;
  }
  .section-heading {
    margin-bottom: 2.25rem;
  }
  .content-section {
    padding-block: 58px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition: none !important;
  }
}