:root {
  --primary: #3f7ae0;
  --primary-hover: #2f63c7;
  --bg: #0f172a;
  --card: #1e293b;
  --text: #e2e8f0;
  --text-soft: #94a3b8;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* HERO */
.hero {
  text-align: center;
  padding: 120px 20px 80px;
}

.hero h1 {
  font-size: 3.5rem;
  color: var(--primary);
  text-shadow: 0 0 20px rgba(63,122,224,0.3);
}

.hero p {
  margin: 20px auto;
  max-width: 600px;
  color: var(--text-soft);
}

.cta {
  margin-top: 30px;
}

/* BUTTON */
.btn {
  display: inline-block;
  margin: 10px;
  padding: 12px 26px;
  background: var(--primary);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  transition: 0.2s;
}

.btn:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
}

.btn.secondary {
  background: transparent;
  border: 1px solid var(--primary);
}

.btn.secondary:hover {
  background: rgba(63,122,224,0.1);
}

/* SECTION */
.section {
  padding: 80px 20px;
  text-align: center;
}

.section h2 {
  font-size: 2rem;
}

.section p {
  color: var(--text-soft);
}

/* FEATURES */
.grid {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 40px;
}

.card {
  background: var(--card);
  padding: 25px;
  border-radius: 12px;
  width: 260px;
  border: 1px solid rgba(255,255,255,0.05);
  transition: 0.2s;
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
}

/* DEMO */
.demo-box {
  margin-top: 30px;
  padding: 60px;
  background: var(--card);
  border-radius: 12px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* DOWNLOAD */
.buttons {
  margin-top: 30px;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 30px;
  background: #020617;
  color: #64748b;
}