:root {
  --bg-1: #020814;
  --bg-2: #071326;
  --bg-3: #0b1d39;
  --panel: rgba(7, 18, 36, 0.82);
  --panel-2: rgba(8, 22, 44, 0.94);
  --line: rgba(84, 199, 255, 0.2);
  --line-strong: rgba(84, 199, 255, 0.45);
  --text: #edf8ff;
  --muted: #9cb8d2;
  --accent: #49d8ff;
  --accent-2: #7a6dff;
  --accent-3: #4cffb6;
  --danger: #ff6b88;
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.38);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --max-width: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, rgba(73, 216, 255, 0.16), transparent 24%),
    radial-gradient(circle at 90% 20%, rgba(122, 109, 255, 0.15), transparent 22%),
    radial-gradient(circle at 50% 100%, rgba(76, 255, 182, 0.08), transparent 28%),
    linear-gradient(180deg, var(--bg-1), var(--bg-2) 42%, var(--bg-3));
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(73, 216, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(73, 216, 255, 0.045) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, rgba(255,255,255,.8), transparent 95%);
  z-index: 0;
}

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

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

.container {
  width: min(var(--max-width), calc(100% - 32px));
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(2, 8, 20, 0.78);
  border-bottom: 1px solid var(--line);
}

.nav {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  position: relative;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(73, 216, 255, 0.15), rgba(122, 109, 255, 0.16));
  box-shadow: inset 0 0 18px rgba(73, 216, 255, 0.1), 0 0 22px rgba(73, 216, 255, 0.08);
  font-size: 0.9rem;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: rgba(8, 20, 38, 0.88);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 800;
}

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

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  transition: 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  text-shadow: 0 0 14px rgba(73, 216, 255, 0.24);
}

.nav-cta {
  padding: 11px 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(7, 18, 36, 0.88);
  color: var(--text);
  font-weight: 800;
  white-space: nowrap;
}

.hero {
  padding: 64px 0 100px;
  min-height: calc(100vh - 78px);
  display: grid;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(8, 20, 36, 0.72);
  color: var(--accent);
  margin-bottom: 18px;
  font-size: 0.92rem;
}

.hero h1,
.page-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(2.4rem, 7vw, 5.4rem);
  line-height: 0.94;
  letter-spacing: -0.04em;
}

.hero h1 span,
.page-hero h1 span {
  color: var(--accent);
  text-shadow: 0 0 24px rgba(73, 216, 255, 0.28);
}

.hero p,
.page-hero p {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.75;
  max-width: 760px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 26px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 16px;
  padding: 14px 20px;
  font-weight: 800;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  cursor: pointer;
}

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

.btn-primary {
  color: #04111b;
  background: linear-gradient(135deg, var(--accent), #8be9ff);
  box-shadow: 0 14px 30px rgba(73, 216, 255, 0.24);
}

.btn-secondary {
  color: var(--text);
  background: rgba(8, 20, 36, 0.82);
  border: 1px solid var(--line);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 720px;
}

.stat-card,
.panel,
.card,
.info-card,
.download-card,
.contact-card,
.timeline-card,
.community-card,
.privacy-card,
.placeholder-card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.stat-card {
  border-radius: 20px;
  padding: 18px;
}

.stat-card small {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.74rem;
}

.stat-card strong {
  font-size: 1.35rem;
  color: var(--text);
}

.hero-panel {
  border-radius: var(--radius-xl);
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.hero-panel::before {
  content: "";
  position: absolute;
  width: 240px;
  height: 240px;
  right: -60px;
  top: -60px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(73, 216, 255, 0.26), transparent 65%);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.panel-title {
  font-size: 1rem;
  font-weight: 800;
}

.live-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-3);
  font-size: 0.9rem;
}

.live-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent-3);
  box-shadow: 0 0 14px rgba(76, 255, 182, 0.6);
  animation: pulse 1.7s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.25); opacity: 0.6; }
}

.system-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  position: relative;
  z-index: 1;
}

.system-box {
  background: rgba(5, 14, 27, 0.64);
  border: 1px solid rgba(84, 199, 255, 0.14);
  border-radius: 18px;
  padding: 16px;
}

.system-box small {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
}

.system-box strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1.08rem;
  color: var(--accent);
}

.system-box p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
  font-size: 0.94rem;
}

section {
  padding: 24px 0 96px;
}

.page-hero {
  padding: 72px 0 54px;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.9rem, 5vw, 3.1rem);
  letter-spacing: -0.03em;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
  max-width: 760px;
  line-height: 1.75;
}

.cards-grid,
.two-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.three-grid,
.downloads-grid,
.timeline,
.community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card,
.info-card,
.download-card,
.timeline-card,
.community-card,
.privacy-card,
.contact-card,
.placeholder-card {
  border-radius: 24px;
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.card::after,
.info-card::after,
.download-card::after,
.placeholder-card::after {
  content: "";
  position: absolute;
  inset: auto auto -60px -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(73,216,255,0.16), transparent 66%);
  pointer-events: none;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(73, 216, 255, 0.08);
  border: 1px solid rgba(73, 216, 255, 0.16);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.card h3,
.info-card h3,
.download-card h3,
.timeline-card h3,
.community-card h3,
.placeholder-card h3 {
  margin: 0 0 10px;
  font-size: 1.28rem;
}

.card p,
.info-card p,
.download-card p,
.timeline-card p,
.community-card p,
.placeholder-card p,
.privacy-card p,
.privacy-card li,
.contact-card p {
  margin: 0 0 16px;
  color: var(--muted);
  line-height: 1.7;
}

.list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.list li + li {
  margin-top: 6px;
}

.section-button {
  margin-top: 22px;
}

.download-card {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.download-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
}

.version-chip {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(76, 255, 182, 0.09);
  border: 1px solid rgba(76, 255, 182, 0.24);
  color: var(--accent-3);
  font-size: 0.82rem;
  font-weight: 800;
}

.download-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.meta-box,
.contact-box {
  padding: 14px;
  border-radius: 16px;
  border: 1px solid rgba(84, 199, 255, 0.14);
  background: rgba(5, 14, 27, 0.58);
}

.meta-box small,
.contact-box small {
  display: block;
  color: var(--muted);
  margin-bottom: 7px;
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

.meta-box strong,
.contact-box strong {
  font-size: 1rem;
  color: var(--accent);
}

.download-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.timeline-card .step {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  font-weight: 800;
  color: #04111b;
  background: linear-gradient(135deg, var(--accent), #8deaff);
}

.privacy-card {
  border-radius: 28px;
  padding: 28px;
}

.privacy-card h3 {
  margin: 0 0 14px;
  font-size: 1.2rem;
  color: var(--accent);
}

.privacy-card ul {
  margin: 0;
  padding-left: 20px;
}

.privacy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 18px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 22px;
  align-items: start;
}

.contact-info {
  display: grid;
  gap: 14px;
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.full {
  grid-column: 1 / -1;
}

input,
textarea {
  width: 100%;
  border: 1px solid rgba(84, 199, 255, 0.16);
  border-radius: 16px;
  padding: 14px 15px;
  background: rgba(3, 11, 22, 0.76);
  color: var(--text);
  font: inherit;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
  resize: vertical;
}

input:focus,
textarea:focus {
  border-color: var(--line-strong);
  box-shadow: 0 0 0 3px rgba(73, 216, 255, 0.08);
}

input::placeholder,
textarea::placeholder {
  color: #7d99b4;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 44px;
  color: var(--muted);
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 1120px) {
  .nav-links {
    gap: 12px;
  }

  .nav-links a {
    font-size: 0.9rem;
  }
}

@media (max-width: 980px) {
  .hero-grid,
  .contact-grid,
  .cards-grid,
  .two-grid,
  .timeline,
  .community-grid,
  .downloads-grid,
  .privacy-grid,
  .three-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats,
  .download-meta {
    grid-template-columns: repeat(3, 1fr);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    padding: 16px;
    border-radius: 18px;
    background: rgba(4, 12, 24, 0.98);
    border: 1px solid var(--line);
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    width: 100%;
    padding: 8px 4px;
    font-size: 1rem;
  }

  .nav-cta {
    display: none;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(var(--max-width), calc(100% - 24px));
  }

  .brand span {
    font-size: 0.88rem;
  }

  .hero {
    min-height: auto;
    padding-top: 38px;
  }

  .hero-stats,
  .system-grid,
  .contact-form,
  .download-meta {
    grid-template-columns: 1fr;
  }

  .section-heading {
    margin-bottom: 20px;
  }

  .btn {
    width: 100%;
  }

  .hero-actions,
  .download-actions {
    flex-direction: column;
  }
}