:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --ink: #132033;
  --muted: #5a6677;
  --line: #dde5ef;
  --brand: #0d6efd;
  --brand-dark: #084298;
  --soft-blue: #eaf4ff;
  --soft-green: #e9f8f0;
  --soft-orange: #fff3df;
  --danger: #7a1f1f;
  --radius: 24px;
  --shadow: 0 24px 60px rgba(18, 34, 60, 0.10);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(13, 110, 253, 0.12), transparent 32rem),
    radial-gradient(circle at 85% 10%, rgba(63, 211, 132, 0.12), transparent 26rem),
    var(--bg);
  line-height: 1.6;
}

a {
  color: inherit;
}

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

button {
  font: inherit;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(246, 248, 251, 0.82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(221, 229, 239, 0.8);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 20px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.logo-icon {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 14px 24px rgba(18, 34, 60, 0.10);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-links a {
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--ink);
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 10px 24px rgba(18, 34, 60, 0.08);
}

.lang-button {
  border: 0;
  padding: 8px 14px;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 800;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.lang-button:hover {
  color: var(--ink);
}

.lang-button:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

.lang-button.active {
  background: var(--brand);
  color: #fff;
  transform: translateY(-1px);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  text-decoration: none;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(18, 34, 60, 0.08);
}

.button.primary {
  border-color: transparent;
  background: var(--brand);
  color: #fff;
}

.hero {
  padding: 72px 0 46px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(320px, 0.97fr);
  gap: 42px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.eyebrow::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 99px;
  background: #20c997;
}

h1 {
  margin: 22px 0 18px;
  font-size: clamp(3rem, 7vw, 6rem);
  line-height: 0.92;
  letter-spacing: -0.08em;
}

.hero p {
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  color: var(--muted);
  max-width: 650px;
  margin: 0 0 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 0;
}

.hero-card {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  border: 1px solid rgba(221, 229, 239, 0.85);
}

.hero-card img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.caption {
  padding: 14px 18px 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.stat {
  padding: 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
}

.stat strong {
  display: block;
  font-size: 1.55rem;
  line-height: 1;
  letter-spacing: -0.05em;
}

.stat span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.88rem;
}

section {
  padding: 58px 0;
}

.section-head {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1;
  letter-spacing: -0.06em;
}

.section-head p {
  color: var(--muted);
  margin: 0;
  font-size: 1.08rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 14px 36px rgba(18, 34, 60, 0.06);
}

.card h3 {
  margin: 0 0 10px;
  letter-spacing: -0.03em;
}

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

.flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.flow-step {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 18px;
  align-items: start;
  padding: 20px;
  border-radius: 22px;
  background: var(--surface);
  border: 1px solid var(--line);
}

.step-num {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: var(--soft-blue);
  color: var(--brand-dark);
  font-weight: 900;
}

.flow-step h3 {
  margin: 0 0 6px;
}

.flow-step p {
  margin: 0;
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.85fr);
  gap: 26px;
  align-items: start;
}

.panel {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 14px 36px rgba(18, 34, 60, 0.06);
}

.panel ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
}

.gallery-card {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 14px 36px rgba(18, 34, 60, 0.06);
}

.gallery-card.large {
  grid-column: span 7;
}

.gallery-card.medium {
  grid-column: span 5;
}

.gallery-card.small {
  grid-column: span 4;
}

.gallery-card img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.gallery-card .caption {
  min-height: 78px;
}

.video-layout {
  display: block;
}

.video-player {
  overflow: hidden;
  border-radius: var(--radius);
  background: #07111d;
  border: 1px solid rgba(13, 27, 42, 0.22);
  box-shadow: var(--shadow);
}

.video-player video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #07111d;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.download-card {
  padding: 28px;
  border-radius: var(--radius);
  background:
    radial-gradient(circle at top right, rgba(13, 110, 253, 0.08), transparent 14rem),
    radial-gradient(circle at left bottom, rgba(32, 201, 151, 0.12), transparent 16rem),
    var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 14px 36px rgba(18, 34, 60, 0.06);
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--soft-blue);
  color: var(--brand-dark);
  font-size: 0.92rem;
  font-weight: 800;
}

.download-card h3 {
  margin: 18px 0 10px;
  font-size: 1.6rem;
  letter-spacing: -0.04em;
}

.download-card p {
  margin: 0;
  color: var(--muted);
}

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 22px;
}

.download-meta span {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
  color: var(--muted);
  font-size: 0.92rem;
}

.repository-card {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) auto;
  gap: 24px;
  align-items: center;
  padding: 32px;
  border-radius: var(--radius);
  background:
    radial-gradient(circle at top left, rgba(13, 110, 253, 0.10), transparent 16rem),
    radial-gradient(circle at right center, rgba(32, 201, 151, 0.14), transparent 18rem),
    var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 14px 36px rgba(18, 34, 60, 0.06);
}

.repository-copy h2 {
  margin: 18px 0 10px;
  font-size: clamp(2rem, 3.8vw, 3rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

.repository-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 1.04rem;
  max-width: 700px;
}

.repository-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.repository-meta span {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
  color: var(--muted);
  font-size: 0.92rem;
}

.repository-actions {
  display: flex;
  justify-content: flex-end;
}

.disclaimer {
  border-left: 6px solid #f59f00;
  background: var(--soft-orange);
  color: #442800;
}

.footer {
  padding: 42px 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 340px;
}

.footer-logo {
  width: min(280px, 100%);
}

.footer-brand p {
  margin: 0;
}

.footer-note {
  font-weight: 700;
  color: var(--ink);
}

@media (max-width: 880px) {
  .nav-links {
    display: none;
  }

  .hero-grid,
  .split,
  .tech-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .repository-card {
    grid-template-columns: 1fr;
  }

  .repository-actions {
    justify-content: flex-start;
  }

  .stat-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .gallery-card.large,
  .gallery-card.medium,
  .gallery-card.small {
    grid-column: span 12;
  }
}

@media (max-width: 520px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .nav-inner {
    min-height: 68px;
  }

  .hero {
    padding-top: 44px;
  }

  .stat-row {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 3.2rem;
  }

  .logo span {
    font-size: 0.95rem;
  }

  .lang-button {
    padding: 8px 12px;
  }
}