* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #000000;
  color: #ffffff;
  font-family: Arial, sans-serif;
  min-height: 100vh;
  animation: fadeIn 1s ease;
}

/* ================= HERO ================= */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
}

.logo {
  max-width: 400px;
  width: 80%;
  height: auto;
  margin-bottom: 28px;
}

h1 {
  margin: 0 0 12px;
  font-size: 40px;
  font-weight: 700;
}

p {
  margin: 0 0 28px;
  color: #6b7280;
  font-size: 18px;
  max-width: 700px;
}

/* ================= BUTTONS ================= */

.buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 14px 22px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  transition: 0.2s ease;
}

.btn-primary {
  background: #00ff88;
  color: #04110b;
}

.btn-primary:hover {
  opacity: 0.92;
}

.btn-secondary {
  border: 1px solid #2a3347;
  color: #ffffff;
  background: transparent;
}

.btn-secondary:hover {
  background: #141b2b;
}

/* ================= DEMO (🔥 NOWA WERSJA) ================= */

.demo-box {
  margin-top: 30px;
  width: 1000px;
  max-width: 95vw;
  aspect-ratio: 16 / 9;
  border: 1px solid #1f2937;
  border-radius: 16px;
  overflow: hidden;
  background: #000;
  box-shadow: 0 0 40px rgba(0, 255, 136, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
}

.demo-box img.slide {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: none;
  background: #000;
}

/* ================= ANIMATION ================= */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}