:root {
  --bg: #090c12;
  --bg-soft: #101725;
  --text: #e7edf7;
  --muted: #95a6bf;
  --line: rgba(175, 206, 255, 0.18);
  --accent: #31c5ff;
  --accent-2: #66ffd1;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Space Grotesk', sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 80% -10%, rgba(49, 197, 255, 0.2), transparent 40%),
    radial-gradient(circle at 10% 20%, rgba(102, 255, 209, 0.1), transparent 36%),
    var(--bg);
}

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

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  backdrop-filter: blur(8px);
  background: rgba(9, 12, 18, 0.65);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo, .footer-logo {
  width: 56px;
  height: 56px;
  border-radius: 10px;
  object-fit: cover;
}
.brand-text { font-size: 14px; color: var(--muted); }
nav { display: flex; gap: 18px; font-size: 14px; color: var(--muted); }

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 100px 20px 40px;
}

.parallax-section {
  position: relative;
  overflow: hidden;
}

.parallax-bg,
.parallax-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  transform: translate3d(0, 0, 0);
  will-change: transform;
}

.content-layer {
  position: relative;
  z-index: 2;
}

.hero-bg {
  background-image: linear-gradient(rgba(6, 9, 13, 0.7), rgba(6, 9, 13, 0.86)), url('https://images-provider.frontiersin.org/api/ipx/w%3D1200%26f%3Dpng/https%3A//www.frontiersin.org/files/Articles/1071174/fcomp-05-1071174-HTML/image_m/fcomp-05-1071174-g001.jpg');
  background-size: cover;
  background-position: center;
  transform: translate3d(0, 0, 0) scale(1.08);
}

.hero-layer {
  border-radius: 999px;
  filter: blur(14px);
  inset: auto;
}

.layer-1 {
  width: 340px;
  height: 340px;
  background: rgba(49, 197, 255, 0.24);
  left: -80px;
  top: 20%;
}

.layer-2 {
  width: 300px;
  height: 300px;
  background: rgba(102, 255, 209, 0.22);
  right: -60px;
  bottom: 10%;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 920px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(12, 17, 26, 0.62);
}

.eyebrow {
  font-family: 'Sora', sans-serif;
  letter-spacing: 0.16em;
  font-size: 12px;
  color: var(--accent-2);
  text-transform: uppercase;
}

h1 {
  margin: 10px 0;
  font-family: 'Sora', sans-serif;
  font-size: clamp(34px, 8vw, 78px);
  line-height: 1.03;
}

.subtitle {
  margin: 0 auto;
  max-width: 640px;
  color: var(--muted);
  font-size: clamp(16px, 3vw, 22px);
}

.hero-cta {
  margin-top: 26px;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-primary,
.btn-ghost {
  display: inline-block;
  padding: 14px 20px;
  border-radius: 10px;
  font-weight: 700;
}

.btn-primary {
  color: #061017;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.btn-ghost {
  border: 1px solid var(--line);
  color: var(--text);
  background: rgba(11, 16, 25, 0.45);
}

.section {
  width: min(1100px, 92vw);
  margin: 0 auto 76px;
}

.parallax-panel {
  padding: 10px;
}

.panel-bg {
  border-radius: 16px;
}

.panel-bg-overview {
  background:
    radial-gradient(circle at 15% 15%, rgba(49, 197, 255, 0.22), transparent 38%),
    linear-gradient(180deg, rgba(10, 14, 22, 0.35), rgba(10, 14, 22, 0.75));
}

.panel-bg-architecture {
  background:
    radial-gradient(circle at 80% 25%, rgba(102, 255, 209, 0.18), transparent 40%),
    linear-gradient(180deg, rgba(13, 18, 28, 0.3), rgba(9, 13, 20, 0.75));
}

.panel-bg-download {
  background:
    radial-gradient(circle at 50% 20%, rgba(49, 197, 255, 0.18), transparent 45%),
    linear-gradient(180deg, rgba(8, 12, 18, 0.38), rgba(9, 13, 20, 0.8));
}

.panel-glow {
  border-radius: 999px;
  filter: blur(20px);
  inset: auto;
  width: 220px;
  height: 220px;
}

.panel-glow-a {
  background: rgba(49, 197, 255, 0.16);
  top: 8%;
  right: -50px;
}

.panel-glow-b {
  background: rgba(102, 255, 209, 0.12);
  top: 18%;
  left: -60px;
}

.panel-glow-c {
  background: rgba(49, 197, 255, 0.18);
  bottom: 2%;
  left: 55%;
}

h2 {
  font-family: 'Sora', sans-serif;
  font-size: clamp(24px, 4vw, 42px);
  margin: 0 0 20px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
}

.compact-cards {
  margin-top: 14px;
}

.card,
.download-box,
.stat,
.screenshot-wrap {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(17, 24, 36, 0.72), rgba(9, 13, 20, 0.85));
}

.card { padding: 16px; }
.card h3 { margin: 0 0 8px; }
.card p, .muted, .download-box p { color: var(--muted); }

.screenshot-wrap { padding: 10px; }
.screenshot {
  width: 100%;
  display: block;
  border-radius: 10px;
}

.floating-shot {
  transform: translate3d(0, 0, 0);
  will-change: transform;
}

.download-box {
  padding: 22px;
  text-align: center;
}

.download-title {
  font-family: 'Sora', sans-serif;
  margin: 0 0 8px;
  font-size: 28px;
  color: var(--text);
}

.status-panel {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(17, 24, 36, 0.72), rgba(9, 13, 20, 0.85));
}

.status-panel h3 {
  margin: 0 0 10px;
  font-family: 'Sora', sans-serif;
  font-size: 22px;
}

.status-panel h4 {
  margin: 14px 0 8px;
  font-family: 'Sora', sans-serif;
  font-size: 17px;
  color: #d5f4ff;
}

.status-panel h3:not(:first-child) {
  margin-top: 22px;
}

.status-panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.status-list {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.status-list li {
  margin-bottom: 8px;
  line-height: 1.65;
}

.status-list code {
  color: #d5f4ff;
}

.info-drop {
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(10, 15, 24, 0.55);
}

.info-drop summary {
  cursor: pointer;
  padding: 12px 14px;
  font-family: 'Sora', sans-serif;
  font-weight: 600;
  color: #d7e7ff;
}

.info-drop[open] summary {
  border-bottom: 1px solid var(--line);
}

.info-drop .status-list {
  margin: 10px 0 12px;
  padding-right: 14px;
}

.checksum {
  margin: 8px auto 10px;
  max-width: 100%;
  overflow-wrap: anywhere;
  font-family: 'Sora', sans-serif;
  font-size: 14px;
  color: var(--accent-2);
}

.verify-cmd {
  margin: 8px auto 0;
  max-width: 780px;
  text-align: left;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(8, 12, 19, 0.9);
  color: #d7e7ff;
  overflow-x: auto;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  gap: 12px;
}

.stat {
  padding: 18px;
}

.label {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
}

.value {
  font-family: 'Sora', sans-serif;
  font-size: clamp(32px, 6vw, 52px);
  font-weight: 800;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--muted);
  flex-wrap: wrap;
}

@media (max-width: 720px) {
  nav { display: none; }
  .brand-text { display: none; }
  .stats-grid { grid-template-columns: 1fr; }
  .hero-content { padding: 20px 16px; }
  .panel-glow { width: 140px; height: 140px; filter: blur(14px); }
  .parallax-section.mobile-parallax-off .parallax-layer,
  .parallax-section.mobile-parallax-off .parallax-bg,
  .floating-shot.mobile-parallax-off {
    transform: none !important;
    will-change: auto;
  }
}
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.lang-switch a {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 4px 8px;
  background: rgba(11, 16, 25, 0.4);
}

.lang-switch a.active {
  color: #061017;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
}

@media (max-width: 980px) {
  .lang-switch {
    width: 100%;
    justify-content: flex-end;
  }
}