:root {
  --bg: #0b1020;
  --panel: #121a2b;
  --panel-2: #182235;
  --text: #e7ecf3;
  --muted: #9eabc0;
  --line: #26324a;
  --accent: #6ea8fe;
  --accent-hover: #8ab8ff;
  --maxw: 1100px;
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

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

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

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(11, 16, 32, 0.9);
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  min-height: 72px;
}

.brand a {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
}

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

.nav a {
  color: var(--muted);
  font-weight: 500;
}

.nav a:hover {
  color: #fff;
}

.hero {
  padding: 72px 0 36px;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.1;
}

.hero p {
  margin: 0;
  max-width: 780px;
  color: var(--muted);
  font-size: 1.05rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
  padding: 20px 0 60px;
}

.card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.card h2,
.page h1 {
  margin-top: 0;
}

.btn {
  display: inline-block;
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #1d2a42;
  color: #fff;
}

.btn:hover {
  background: #253553;
}

.page {
  padding: 48px 0 64px;
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 24px 0;
}

@media (max-width: 700px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .nav {
    gap: 12px;
  }
}