:root {
  --bg: #0b0f14;
  --fg: #e6e8eb;
  --muted: #9aa3ad;
  --accent: #6ea8fe;
  --panel: #121823;
  --border: #1f2a3a;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

header {
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #0d121b, #0b0f14);
}

.nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav .brand {
  font-weight: 600;
  letter-spacing: 0.5px;
}

.nav nav a {
  margin-left: 24px;
  font-size: 0.95rem;
  color: var(--fg);
}

.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
}

.hero img {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--border);
}

section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 34px 4px 40px 24px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 32px;
}

h1, h2, h3 {
  font-weight: 500;
  letter-spacing: 0.4px;
}

h1 {
  font-size: 2.4rem;
  margin-top: 0;
}

h2 {
  font-size: 1.8rem;
  margin-top: 0;
}

h3 {
  font-size: 1.2rem;
}

p {
  color: var(--fg);
}

.muted {
  color: var(--muted);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }
}