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

html, body {
  background-color: #000000;
}

body {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo {
  color: #ffffff;
  font-family: sans-serif;
  font-size: 4rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: color 0.2s ease;
}

.logo:hover {
  color: #cccccc;
}

.float-btn {
  position: fixed;
  top: 20px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  color: #ffffff;
  font-family: "Times New Roman", Times, serif;
  font-weight: 700;
  font-size: 1.4rem;
  border-radius: 50%;
  text-decoration: none;
  transition: opacity 0.2s ease, transform 0.1s ease;
  z-index: 10;
}

.float-btn.left {
  left: 20px;
}

.float-btn.right {
  right: 20px;
}

.float-btn:hover {
  opacity: 0.7;
}

.float-btn:active {
  transform: scale(0.95);
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.overlay.hidden {
  display: none;
}

.video-container {
  position: relative;
  width: 80%;
  max-width: 900px;
}

.video-container video {
  width: 100%;
  border-radius: 6px;
}

.close-btn {
  position: absolute;
  top: -40px;
  right: 0;
  background: transparent;
  border: none;
  color: #ffffff;
  font-size: 1.5rem;
  cursor: pointer;
}