:root {
  --bg: #0b1220;
  --text: #e6edf7;
  --muted: #a8b3c7;
  --card: #0f1b33;
  --line: #1f2a44;
  --accent: #22d3ee;
  --accent2: #60a5fa;
}

* {
  box-sizing: border-box
}

html {
  scroll-behavior: smooth
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6
}

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

a:hover {
  text-decoration: underline
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px
}

header {
  position: sticky;
  top: 0;
  background: rgba(11, 18, 32, .85);
  border-bottom: 1px solid var(--line)
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  gap: 12px
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text)
}

.logo img {
  width: 28px;
  height: 28px
}

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

.nav a {
  padding: 8px 10px;
  border-radius: 10px;
  color: var(--text)
}

.nav a:hover {
  background: #0f1b33
}

main {
  padding: 24px 0
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 24px;
  align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid var(--line)
}

.hero h1 {
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1.15;
  margin: 6px 0
}

.hero p {
  color: var(--muted);
  margin: 0 0 12px
}

.btn {
  display: inline-block;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  color: #04202b;
  font-weight: 700;
  border: none;
  padding: 10px 14px;
  border-radius: 12px;
  text-decoration: none
}

.section {
  padding: 28px 0;
  border-bottom: 1px solid var(--line)
}

h2 {
  margin: 0 0 8px;
  font-size: clamp(22px, 3.2vw, 30px)
}

.lead {
  color: var(--muted);
  margin: 0 0 16px
}

.grid {
  display: grid;
  gap: 12px
}

.cards {
  grid-template-columns: repeat(3, 1fr)
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px
}

.card h3 {
  margin: 0 0 6px;
  font-size: 18px
}

.card p {
  margin: 0
}

ul.clean {
  padding-left: 18px
}

kbd {
  padding: 2px 6px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: #0f1b33;
  font-family: ui-monospace, Menlo, Consolas, monospace
}

footer {
  padding: 24px 0;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid var(--line);
  margin-top: 24px
}

.hero-art {
  height: 280px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0d172c
}

.hero-art img {
  height: 100%;
  width: 100%;
  padding: 15px 20px;
  border-radius: 12px;
}

@media (max-width:880px) {
  .hero {
    grid-template-columns: 1fr
  }

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

@media (max-width:560px) {
  .cards {
    grid-template-columns: 1fr
  }
}