*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family:Arial, Helvetica, sans-serif;
}

body{
  background:#f5f7fb;
  color:#222;
  line-height:1.6;
}

.container{
  width:90%;
  max-width:1200px;
  margin:auto;
}

.hero{
  min-height:100vh;
  background:
    linear-gradient(rgba(0,0,0,0.55), rgba(0,0,0,0.65)),
    url('https://images.unsplash.com/photo-1517649763962-0c623066013b?q=80&w=1400&auto=format&fit=crop');
  background-size:cover;
  background-position:center;
  color:white;
}

.navbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:20px 5%;
  backdrop-filter:blur(4px);
}

.brand{
  display:flex;
  align-items:center;
  gap:15px;
}

.brand img{
  width:70px;
  height:70px;
  border-radius:50%;
  object-fit:cover;
  background:white;
}

.navbar ul{
  display:flex;
  list-style:none;
  gap:25px;
}

.navbar a{
  color:white;
  text-decoration:none;
  font-weight:bold;
  transition:0.3s;
}

.navbar a:hover{
  color:#ffb400;
}

.hero-content{
  text-align:center;
  padding:140px 20px;
}

.hero-content h2{
  font-size:4rem;
  margin-bottom:20px;
}

.hero-content p{
  max-width:700px;
  margin:auto;
  font-size:1.2rem;
}

.btn{
  display:inline-block;
  margin-top:30px;
  background:#ffb400;
  color:#111;
  padding:15px 30px;
  border-radius:40px;
  text-decoration:none;
  font-weight:bold;
  transition:0.3s;
}

.btn:hover{
  background:#ffffff;
  transform:translateY(-3px);
}

.section{
  padding:80px 0;
}

.section h2{
  text-align:center;
  margin-bottom:20px;
  font-size:2.5rem;
  color:#0a3d62;
}

.section p{
  text-align:center;
  max-width:800px;
  margin:0 auto 30px;
}

.cards{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:25px;
  margin-top:40px;
}

.card{
  background:white;
  padding:30px;
  border-radius:20px;
  box-shadow:0 10px 25px rgba(0,0,0,0.08);
  transition:0.3s;
}

.card:hover{
  transform:translateY(-5px);
}

.card h3{
  margin-bottom:15px;
  color:#ff4b2b;
}

.dark-section{
  background:#0a3d62;
  color:white;
}

.dark-section h2{
  color:white;
}

.register-btn{
  display:block;
  width:max-content;
  margin:30px auto;
}

.note{
  opacity:0.8;
}

.media-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:30px;
  margin-top:40px;
}

.media-card{
  background:white;
  border-radius:20px;
  padding:20px;
  box-shadow:0 10px 25px rgba(0,0,0,0.08);
}

.placeholder{
  height:300px;
  display:flex;
  justify-content:center;
  align-items:center;
  text-align:center;
  border:2px dashed #bbb;
  border-radius:15px;
  color:#666;
  padding:20px;
}

.video-wrapper iframe{
  width:100%;
  height:300px;
  border-radius:15px;
}

.countdown-section{
  background:linear-gradient(135deg,#ffb400,#ff4b2b);
  color:white;
  text-align:center;
  padding:70px 20px;
}

#countdown{
  font-size:2rem;
  font-weight:bold;
  margin-top:20px;
}

footer{
  background:#111;
  color:white;
  padding-top:50px;
}

.footer-content{
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:30px;
}

footer h3, footer h4{
  margin-bottom:15px;
}

.copyright{
  text-align:center;
  margin-top:40px;
  padding:20px;
  border-top:1px solid rgba(255,255,255,0.1);
}

@media(max-width:768px){

  .navbar{
    flex-direction:column;
    gap:20px;
  }

  .navbar ul{
    flex-wrap:wrap;
    justify-content:center;
  }

  .hero-content h2{
    font-size:2.5rem;
  }

  .media-grid{
    grid-template-columns:1fr;
  }

  .footer-content{
    flex-direction:column;
  }
}