:root {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --border: #334155;
  --radius: 8px;
}
body { background: var(--bg); color: var(--text); font-family: system-ui, -apple-system, sans-serif; line-height: 1.6; margin: 0; }
header { background: #020617; border-bottom: 1px solid var(--border); padding: 1rem 0; position: sticky; top: 0; z-index: 50; }
nav { max-width: 1100px; margin: 0 auto; padding: 0 1rem; display: flex; justify-content: space-between; align-items: center; }
nav strong { color: var(--accent); font-size: 1.25rem; letter-spacing: 0.5px; }
nav a { color: var(--text); text-decoration: none; margin-left: 1.5rem; font-size: 0.95rem; font-weight: 500; }
nav a:hover { color: var(--accent); }

.hero { text-align: center; padding: 5rem 1rem; background: radial-gradient(circle at top, #1e293b, #0f172a); border-bottom: 1px solid var(--border); }
.hero h1 { font-size: 2.5rem; margin-bottom: 1rem; color: #fff; line-height: 1.2; }
.hero p { max-width: 800px; margin: 0 auto; color: var(--muted); font-size: 1.15rem; }

.container { max-width: 1100px; margin: 0 auto; padding: 3rem 1rem; }
.section-title { margin-bottom: 2rem; border-left: 4px solid var(--accent); padding-left: 1rem; }
.section-title h2 { margin: 0; color: #fff; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; }
.card-content { padding: 2rem; flex-grow: 1; }
.card h3 { margin-top: 0; color: var(--accent); font-size: 1.4rem; }
.tag { display: inline-block; background: rgba(56, 189, 248, 0.1); color: var(--accent); padding: 4px 8px; border-radius: 4px; font-size: 0.75rem; font-weight: bold; text-transform: uppercase; margin-bottom: 1rem; }
ul { padding-left: 20px; color: var(--muted); }
li { margin-bottom: 0.5rem; }

footer { text-align: center; padding: 3rem; color: var(--muted); border-top: 1px solid var(--border); margin-top: 4rem; background: #020617; }