:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --accent: #3b82f6;
  --border: #e2e8f0;
  --radius: 12px;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.header {
  background: var(--card);
  border-bottom: 1px solid var(--border)
}

.logo {
  font-size: 22px;
  color: #00ff00;
}

.logo .dot {
  color: var(--text);
}

/* Main content */
.main {
  flex: 1;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 60px 20px;
}

.intro {
  text-align: center;
  margin-bottom: 40px;
}

.intro h1 {
  font-size: clamp(26px, 5vw, 38px);
  margin-bottom: 10px;
}

.tagline {
  font-size: 17px;
  color: var(--muted);
}

.content p {
  max-width: 70ch;
  margin: 0 auto 30px;
  color: var(--text);
  line-height: 1.6;
}

/* Cards */
.cards {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.03);
}

.card h3 {
  margin-bottom: 10px;
  color: var(--accent);
}

.card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
  margin-bottom: 14px;
}

.btn {
  display: inline-block;
  padding: 8px 14px;
  background: var(--accent);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
}

.btn:hover {
  opacity: 0.9;
}

/* Footer */
.footer {
  background: var(--card);
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 20px;
  font-size: 10px;
  color: var(--muted);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 6px;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

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