:root {
  --bg: #0f172a;
  --card: #111827;
  --accent: #38bdf8;
  --accent-dark: #0ea5e9;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --border: #1f2937;
}

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

body {
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: var(--text);
  line-height: 1.6;
}

.container {
  width: min(1000px, 92%);
  margin: 0 auto;
}

header {
  padding: 72px 0 40px;
  text-align: center;
}

header h1 {
  font-size: 2.4rem;
  margin-bottom: 12px;
}

header p {
  max-width: 720px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  text-decoration: none;
  padding: 14px 22px;
  border-radius: 10px;
  font-weight: bold;
  transition: 0.2s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #082f49;
}

.btn-primary:hover {
  background: var(--accent-dark);
  color: white;
}

.btn-secondary {
  border-color: var(--border);
  color: var(--text);
  background: rgba(255,255,255,0.04);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.08);
}

section {
  padding: 24px 0;
}

.card {
  background: rgba(17, 24, 39, 0.92);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 22px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

h2 {
  margin-bottom: 14px;
  font-size: 1.5rem;
  color: white;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.feature {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}

.feature h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
  color: white;
}

.feature p,
.card p,
.card li {
  color: var(--muted);
}

ul {
  padding-left: 20px;
  margin-top: 10px;
}

.download-box {
  text-align: center;
  padding: 28px;
}

.small {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

footer {
  text-align: center;
  padding: 30px 0 50px;
  color: var(--muted);
  font-size: 0.95rem;
}

code {
  background: rgba(255,255,255,0.08);
  padding: 2px 6px;
  border-radius: 6px;
}