:root {
  --bg: #050816;
  --bg-soft: #0b1024;
  --bg-card: rgba(255, 255, 255, 0.06);
  --text: #f4f7ff;
  --muted: #aab4d4;
  --blue: #0a6cff;
  --green: #2cbf8c;
  --border: rgba(255, 255, 255, 0.12);
  --glow-blue: rgba(10, 108, 255, 0.35);
  --max: 1180px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
  font-family: Arial, Helvetica, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(10, 108, 255, 0.18), transparent 35%),
    radial-gradient(circle at top right, rgba(44, 191, 140, 0.14), transparent 30%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

.container {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

/* HEADER */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 8, 22, 0.86);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}

.header-content {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.brand-mark {
  padding: 8px 10px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--blue), var(--green));
  color: #fff;
  font-size: 0.85rem;
  box-shadow: 0 0 28px var(--glow-blue);
}

.brand-text { letter-spacing: 0.04em; }

.main-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  color: var(--muted);
  font-size: 0.92rem;
  flex-wrap: wrap;
}

.main-nav a {
  padding: 8px 0;
  transition: color .2s ease, transform .2s ease;
}

.main-nav a:hover {
  color: var(--text);
  transform: translateY(-1px);
}

/* HERO */

.hero {
  position: relative;
  min-height: calc(100vh - 78px);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 10%;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle, black, transparent 70%);
  opacity: 0.7;
}

.hero-glow {
  position: absolute;
  width: 460px;
  height: 460px;
  border-radius: 999px;
  background: radial-gradient(circle, var(--glow-blue), transparent 70%);
  right: 6%;
  top: 18%;
  filter: blur(10px);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 980px;
  padding: 92px 0;
}

.eyebrow,
.section-label {
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2.45rem, 5.8vw, 5.45rem);
  line-height: 0.98;
  letter-spacing: -0.06em;
  max-width: 1080px;
}

.hero-text {
  max-width: 780px;
  margin-top: 28px;
  font-size: 1.16rem;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  border: 1px solid var(--border);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--green));
  color: #fff;
  box-shadow: 0 0 32px var(--glow-blue);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

.btn:hover {
  transform: translateY(-2px);
  border-color: rgba(44, 191, 140, 0.55);
}

/* SECTIONS */

.section { padding: 96px 0; }

.section-dark {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01)),
    var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.grid-2 {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.55rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

h3 {
  font-size: 1.22rem;
  margin-bottom: 10px;
}

p {
  color: var(--muted);
  margin-bottom: 16px;
}

strong { color: var(--text); }

/* CARDS */

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 38px;
}

.cards.five { grid-template-columns: repeat(5, 1fr); }

.card,
.library-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 24px;
  min-height: 210px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.18);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease, background .2s ease;
}

.card span {
  display: inline-block;
  color: var(--green);
  font-weight: 900;
  margin-bottom: 18px;
}

.card:hover,
.library-card:hover {
  border-color: rgba(44, 191, 140, 0.55);
  transform: translateY(-4px);
  box-shadow: 0 22px 70px rgba(10, 108, 255, 0.18);
  background: rgba(255, 255, 255, 0.075);
}

.library-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 38px;
}

.library-card {
  display: block;
  min-height: 170px;
}

/* FEATURE LIST */

.feature-list {
  list-style: none;
  margin-top: 24px;
  display: grid;
  gap: 12px;
}

.feature-list li {
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.feature-list li::before {
  content: "●";
  color: var(--green);
  margin-right: 10px;
}

/* VISION */

.vision {
  padding: 110px 0;
  text-align: center;
  background:
    radial-gradient(circle at center, rgba(10, 108, 255, 0.24), transparent 50%),
    linear-gradient(135deg, rgba(10, 108, 255, 0.16), rgba(44, 191, 140, 0.12));
}

.vision h2 {
  max-width: 940px;
  margin: 0 auto 22px;
}

.vision p {
  max-width: 760px;
  margin: 0 auto;
  font-size: 1.08rem;
}

.vision .hero-actions {
  justify-content: center;
}

/* FOOTER */

.footer {
  padding: 44px 0;
  background: #030511;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 32px;
}

.footer h3 { color: var(--text); }

/* RESPONSIVE */

@media (max-width: 1100px) {
  .cards.five {
    grid-template-columns: repeat(3, 1fr);
  }

  .main-nav {
    gap: 14px;
    font-size: 0.88rem;
  }
}

@media (max-width: 980px) {
  .header-content {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 0;
  }

  .main-nav {
    justify-content: flex-start;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .cards,
  .cards.five,
  .library-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero {
    min-height: auto;
  }

  .hero-content {
    padding: 78px 0;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 24px, var(--max));
  }

  .main-nav {
    gap: 10px 14px;
    font-size: 0.86rem;
  }

  .section {
    padding: 72px 0;
  }

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

  .card,
  .library-card {
    min-height: auto;
  }

  .hero h1 {
    font-size: 2.45rem;
  }

  .hero-text {
    font-size: 1rem;
  }

  .footer-content {
    flex-direction: column;
  }
}