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

body, html {
  height: 100%;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background: url('../img/background.jpg') no-repeat center center fixed;
  background-size: cover;
  color: #fff;
}

.overlay {
  background-color: rgba(0, 0, 0, 0.6);
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 20px;
}

.center-box {
  position: relative;
  display: inline-block;
  max-width: 90%;
  width: 400px;
  cursor: pointer;
}

.thumbnail {
  width: 100%;
  border-radius: 15px;
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.7);
}

.play-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 72px;
  color: #fff;
  text-shadow: 0 0 20px rgba(0, 0, 0, 0.8);
  opacity: 0.9;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.play-button:hover {
  transform: translate(-50%, -50%) scale(1.1);
  opacity: 1;
  color: #ffd700;
}

.clock, .countdown {
  font-size: 1.2rem;
  margin: 15px 0;
  color: #00ffcc;
}

.marquee {
  font-size: 1.5rem;
  padding: 12px 0;
  color: #ffeb3b;
}

.welcome-text {
  margin-top: 25px;
  font-size: 1.3rem;
}