:root {
  --bg: #15131A;
  --bg-alt: #1D1B23;
  --bg-card: #2B2832;
  --surface: #1D1B23;
  --accent: #A5AEF7;
  --accent-strong: #7D88EF;
  --accent-alt: #F09CD6;
  --success: #6FCF97;
  --text: #EDEDED;
  --text-muted: #A8A4B0;
  --text-dim: #A8A4B0;
  --text-soft: #EDEDED;
  --border: #4A4754;
  --border-strong: rgba(165, 174, 247, 0.3);
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img,
svg {
  max-width: 100%;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--border);
  background: rgba(21, 19, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 16px;
  padding-bottom: 16px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
}

.brand-glyph {
  display: block;
  width: 40px;
  height: 40px;
}

.brand-name {
  display: block;
  height: 22px;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 14px;
}

.nav-contact {
  display: inline-block;
  background: var(--bg-card);
  color: var(--text);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 9999px;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
}

.nav-contact:hover {
  color: var(--accent);
}

.nav-lang {
  border: 1px solid var(--border);
  background: transparent;
  color: rgba(255, 255, 255, 0.8);
  padding: 8px 12px;
  border-radius: 9999px;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.nav-lang:hover {
  color: var(--accent);
  border-color: var(--border-strong);
}

main {
  position: relative;
  z-index: 10;
}

.section {
  padding: 88px 0;
  scroll-margin-top: 96px;
}

main > section:nth-of-type(even) {
  background: var(--bg-alt);
}

.section-hero {
  position: relative;
  overflow: hidden;
  padding-top: 56px;
  padding-bottom: 96px;
  background: var(--bg);
}

.section-hero::before,
.section-hero::after {
  content: "";
  position: absolute;
  pointer-events: none;
  z-index: 0;
  border-radius: 50%;
  filter: blur(120px);
  will-change: transform;
}

.section-hero::before {
  width: 55vw;
  height: 55vh;
  left: -5%;
  top: -10%;
  background: rgba(125, 136, 239, 0.12);
  animation: hero-glow-1 8s ease-in-out infinite alternate;
}

.section-hero::after {
  width: 50vw;
  height: 50vh;
  right: -5%;
  bottom: -10%;
  background: rgba(240, 156, 214, 0.08);
  animation: hero-glow-2 11s ease-in-out infinite alternate;
}

.section-hero > .container {
  position: relative;
  z-index: 1;
}

@keyframes hero-glow-1 {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(35vw, 15vh) scale(1.3); }
  100% { transform: translate(20vw, 30vh) scale(1.1); }
}

@keyframes hero-glow-2 {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(-30vw, -20vh) scale(1.25); }
  100% { transform: translate(-40vw, 10vh) scale(1.4); }
}

.hero-title {
  font-family: var(--sans);
  font-weight: 600;
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0;
  max-width: 900px;
}

.hero-lead {
  margin: 24px 0 0;
  max-width: 600px;
  font-size: 18px;
  line-height: 32px;
  color: var(--text-muted);
}

.download {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.card-stats {
  display: flex;
  gap: 24px;
  margin-top: 20px;
}

.card-cta {
  margin-top: 20px;
}

.btn[disabled] {
  background: transparent;
  border: 1px dashed var(--border-strong);
  color: var(--text-dim);
  cursor: not-allowed;
}

.card-stat-value {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--accent-alt);
}

.card-stat-label {
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-muted);
}

.qr-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.qr-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 14px 14px 12px;
  border-radius: 12px;
  background: var(--text);
  color: var(--bg);
  text-decoration: none;
  transition: transform 0.2s;
}

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

.qr-card img {
  display: block;
  width: 124px;
  height: 124px;
}

.qr-card span {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 9999px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: opacity 0.2s, background 0.2s, border-color 0.2s, color 0.2s;
}

.btn-primary {
  background: var(--accent-strong);
  color: var(--text);
}

.btn-primary:hover {
  background: var(--accent);
}

.btn-ghost {
  border-color: var(--border-strong);
  color: var(--accent);
  background: transparent;
  font-weight: 500;
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--text);
}

.section-head {
  max-width: 720px;
}

.eyebrow {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--sans);
  font-weight: 600;
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.005em;
  margin: 0;
}

.section-lead {
  margin: 20px 0 0;
  font-size: 18px;
  line-height: 32px;
  color: var(--text-muted);
}

.cards-grid {
  margin-top: 40px;
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
}

.cards-grid > * {
  min-width: 0;
}

@media (min-width: 640px) {
  .cards-2,
  .cards-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .cards-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1280px) {
  .cards-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  position: relative;
  padding: 24px;
  border-radius: 12px;
  background: var(--bg-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.card-dark {
  background: var(--bg-card);
}

.card-tech {
  padding: 24px;
}

.card--app { --card-accent: var(--accent); }
.card--lab { --card-accent: var(--accent-alt); }
.card--tools { --card-accent: var(--success); }

.card--app::before,
.card--lab::before,
.card--tools::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--card-accent);
  border-radius: 12px 0 0 12px;
}

.card--app .card-title,
.card--lab .card-title,
.card--tools .card-title {
  color: var(--card-accent);
}

.card--app .card-bullets li::before,
.card--lab .card-bullets li::before,
.card--tools .card-bullets li::before {
  color: var(--card-accent);
}

.card-title {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.25;
  margin: 0 0 12px;
  color: var(--accent);
}

.card-text {
  margin: 0 0 20px;
  line-height: 28px;
  color: var(--text-muted);
}

.card-text:last-child {
  margin-bottom: 0;
}

.card-bullets {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--text-muted);
}

.card-bullets li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 8px;
}

.card-bullets li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-inner a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-inner a:hover {
  color: var(--accent);
}

@media (max-width: 768px) {
  .section {
    padding: 48px 0;
  }

  .section-hero {
    padding-top: 32px;
    padding-bottom: 40px;
  }

  .section-hero::before,
  .section-hero::after {
    filter: blur(60px);
  }

  .section-hero::before {
    background: rgba(125, 136, 239, 0.14);
    animation-duration: 18s;
  }

  .section-hero::after {
    background: rgba(240, 156, 214, 0.10);
    animation-duration: 24s;
  }

  .hero-lead,
  .section-lead {
    font-size: 16px;
    line-height: 26px;
  }

  .eyebrow {
    font-size: 12px;
    letter-spacing: 0.15em;
  }

  .card {
    padding: 22px;
  }

  .card-tech {
    padding: 22px;
  }

  .download {
    align-self: stretch;
    align-items: stretch;
    width: 100%;
  }

  .download-button {
    width: 100%;
  }

  .btn {
    padding: 12px 18px;
  }
}