:root {
  --bg: #0a0a0a;
  --bg-header: rgba(10, 10, 10, 0.92);
  --text: #ffffff;
  --text-muted: #b0b0b0;
  --text-dim: #888888;
  --line: #2a2a2a;
  --blue: #2563eb;
  --blue-hover: #1d4ed8;
  --blue-active: #1e40af;
  --accent: #5eb8ff;
  --font: "Segoe UI", "Malgun Gothic", sans-serif;
  --header-h: 70px;
  --max: 1080px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
}

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

a:hover {
  color: var(--text);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 4px clamp(16px, 4vw, 40px) 4px clamp(8px, 1.5vw, 16px);
  background: var(--bg-header);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.brand {
  margin: 0;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  line-height: 0;
}

.brand img {
  display: block;
  height: clamp(44px, 7vw, 52px);
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-left: auto;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 4px;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
}

.nav-link:hover {
  color: var(--text);
}

.nav-link.active {
  color: var(--text);
  border-bottom-color: var(--blue);
}

.btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 20px;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  background: var(--blue);
  border: none;
  border-radius: 7px;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease, transform 0.1s ease;
}

.btn-download:hover {
  background: var(--blue-hover);
  color: #fff;
}

.btn-download:active {
  background: var(--blue-active);
  transform: scale(0.98);
}

.btn-download--lg {
  padding: 12px 35px;
  font-size: 1.3rem;
  font-weight: 600;
  border-radius: 9px;
}

.main {
  padding-top: var(--header-h);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: pane-in 0.48s ease;
}

@keyframes pane-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  justify-content: flex-end;
  text-align: right;
  padding: clamp(48px, 10vh, 96px) clamp(24px, 6vw, 72px) clamp(48px, 10vh, 96px) clamp(16px, 4vw, 40px);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-color: #050505;
  background-image: url("https://assets.getsnapbond.com/brand/background.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 800px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.hero-title {
  margin: 0 0 16px;
  font-size: clamp(1.75rem, 5vw, 3.15rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero-sub {
  margin: 0 0 28px;
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 36em;
}

.videos {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(120px, 21vw, 210px) clamp(16px, 4vw, 40px);
  display: flex;
  flex-direction: column;
  gap: clamp(108px, 18vw, 180px);
}

.video-block,
.about-block {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.video-block.is-in,
.about-block.is-in {
  opacity: 1;
  transform: none;
}

.video-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.video-title {
  margin: 0;
  text-align: center;
  font-size: clamp(1.35rem, 3.2vw, 2rem);
  font-weight: 550;
  line-height: 1.35;
}

.accent {
  color: var(--accent);
}

.videos video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  background: #111;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.videos video.is-ready {
  opacity: 1;
}

.about {
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(48px, 10vw, 96px) clamp(16px, 4vw, 40px);
}

.about-block {
  margin: 0 0 clamp(72px, 12vw, 140px);
}

.about-block:last-child {
  margin-bottom: 0;
}

.about h2 {
  margin: 0 0 16px;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
}

.about p {
  margin: 0 0 12px;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.6;
}

.about-list,
.about-steps {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.65;
}

.about-list li,
.about-steps li {
  margin: 0 0 12px;
}

.about-list li:last-child,
.about-steps li:last-child {
  margin-bottom: 0;
}

.about-list strong,
.about-steps strong {
  color: var(--text);
  font-weight: 700;
}

.about-steps p {
  margin: 6px 0 0;
}

.about code {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 0.92em;
  color: var(--accent);
}

.site-footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px clamp(16px, 4vw, 40px) 56px;
  text-align: center;
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.7;
}

.site-footer .footer-copy {
  margin: 0 0 12px;
}

.site-footer .footer-links {
  margin: 0 0 16px;
}

.site-footer .footer-links a {
  color: var(--text-muted);
}

.site-footer .footer-links a:hover {
  color: var(--text);
  text-decoration: underline;
}

.site-footer .footer-sep {
  margin: 0 8px;
  color: var(--line);
}

.site-footer .footer-disclaimer {
  margin: 0;
  color: var(--text-dim);
}

.licenses-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px clamp(16px, 4vw, 40px) 64px;
}

.licenses-page .lead {
  color: var(--text-muted);
  margin: 0 0 24px;
}

.licenses-page table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.licenses-page th,
.licenses-page td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
  color: var(--text-muted);
}

.licenses-page th {
  color: var(--text);
  font-weight: 600;
}

.br-m {
  display: none;
}

@media (max-width: 640px) {
  .br-m {
    display: inline;
  }

  .site-header {
    flex-wrap: nowrap;
  }

  .nav {
    flex-wrap: nowrap;
    gap: 6px 10px;
  }

  .brand img {
    height: clamp(28px, 8vw, 40px);
  }

  .nav-link {
    font-size: clamp(0.75rem, 2.8vw, 0.9rem);
    padding: 6px 2px;
    white-space: nowrap;
  }

  .site-header .btn-download {
    padding: clamp(6px, 1.5vw, 8px) clamp(10px, 2.5vw, 14px);
    font-size: clamp(0.75rem, 2.8vw, 0.85rem);
    white-space: nowrap;
    flex-shrink: 0;
  }

  .hero {
    min-height: calc(100vh - var(--header-h));
    justify-content: flex-end;
    text-align: right;
    align-items: center;
    padding: clamp(40px, 8vh, 72px) clamp(16px, 4vw, 24px);
  }

  .hero-bg {
    background-position: left center;
  }

  .hero-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
      215deg,
      rgba(5, 5, 5, 0.92) 0%,
      rgba(5, 5, 5, 0.7) 40%,
      rgba(5, 5, 5, 0.3) 80%,
      transparent 90%
    );
    pointer-events: none;
  }

  .hero-inner {
    align-items: flex-end;
    max-width: 100%;
  }

  .hero-title {
    font-size: clamp(2.45rem, 10vw, 3.25rem);
  }

  .hero-sub {
    max-width: 100%;
    font-size: clamp(1.1rem, 4vw, 1.28rem);
  }

  .btn-download--lg {
    padding: 12px 35px;
    font-size: 1.1rem;
    font-weight: 700;
  }

  .videos {
    padding: clamp(84px, 15vw, 150px) clamp(16px, 4vw, 24px);
    gap: clamp(76px, 13vw, 130px);
  }

  .video-title {
    padding: 0 4px;
  }
}

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

  .tab-pane.active {
    animation: none;
  }

  .video-block,
  .about-block {
    opacity: 1;
    transform: none;
    transition: none;
  }
}