body {
  margin: 0;
  font-family: Arial, sans-serif;
  text-align: center;
  color: #222;
  background: #fff;
  line-height: 1.6;
}

/* HERO */
.hero {
  background: linear-gradient(135deg, #111, #333);
  color: white;
  padding: 100px 20px;
}

.hero h1 {
  font-size: 40px;
  margin-bottom: 10px;
}

.hero p {
  font-size: 18px;
  opacity: 0.9;
}

/* SECTIONS (GÜVENLİ - HER ZAMAN GÖRÜNÜR) */
section {
  padding: 70px 20px;
  max-width: 900px;
  margin: auto;

  /* animasyon güvenli */
  opacity: 1;
  transform: none;
}

/* LIST */
ul {
  list-style: none;
  padding: 0;
}

li {
  margin: 10px 0;
}

/* VIDEOS */
.videos {
  background: #f9f9f9;
}

.video-container {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.video-container iframe {
  width: 100%;
  max-width: 400px;
  height: 225px;
  border-radius: 12px;
}

/* BUTTON */
.btn {
  display: inline-block;
  background: #25D366;
  color: white;
  padding: 16px 32px;
  text-decoration: none;
  border-radius: 40px;
  font-weight: bold;
  margin-top: 20px;
  transition: 0.3s ease;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn:hover {
  background: #1ebe5d;
  transform: scale(1.05);
}

/* CTA */
.cta {
  background: #f2f2f2;
  padding: 80px 20px;
}

/* SUB TEXT */
.sub {
  font-size: 14px;
  opacity: 0.8;
  margin-top: 10px;
}

/* MOBILE */
@media (max-width: 600px) {
  .hero h1 {
    font-size: 26px;
  }

  .video-container {
    flex-direction: column;
    align-items: center;
  }
}