body {
  margin: 0;
  padding: 0;
  height: 100vh;
  background: linear-gradient(135deg, #000000, #333333);
  font-family: 'Arial', sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-x: hidden;
}

.container {
  background: rgba(255, 255, 255, 0.07);
  border-radius: 15px;
  box-shadow: 0 0 35px rgba(255, 255, 255, 0.15);
  padding: 40px 40px 60px 40px;
  max-width: 850px;
  width: 95%;
  text-align: center;
  color: white;
  position: relative;
  backdrop-filter: blur(12px);
  border: 1.2px solid rgba(255, 255, 255, 0.2);
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.top-bar {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.1);
  padding: 10px 16px;
  border-radius: 6px;
  font-size: 16px;
  color: white;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  user-select: none;
}

.logout-btn {
  position: absolute;
  top: 20px;
  left: 20px;
  color: white;
  background: transparent;
  border: 2px solid white;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10;
  user-select: none;
}
.logout-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: scale(1.05);
  box-shadow: 0 0 12px white;
}

.welcome-message h2 {
  font-size: 34px;
  margin: 0;
  font-weight: 700;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.7);
  user-select: none;
}

.button-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 80px;
  gap: 8px;
  width: 100%;
}

.btn {
  background: linear-gradient(135deg, #111111, #444444);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0);
  font-size: 17px;
  font-weight: 600;
  text-transform: uppercase;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.35s ease;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 6px 10px rgba(255, 255, 255, 0.15);
  user-select: none;
  overflow: hidden;
  position: relative;
}

.btn:hover {
  background: linear-gradient(135deg, #555555, #888888);
  border-color: #ffffff00;
  box-shadow: 0 0 15px white, 0 0 8px white inset;
  transform: scale(1.1);
  z-index: 5;
}

.credits {
  font-size: 13px;
  color: #ccc;
  opacity: 0.75;
  text-align: center;
  user-select: none;
  margin-top: 15px;
}

.shape {
  position: absolute;
  opacity: 0.08;
  animation: float 15s ease-in-out infinite alternate;
}
.shape1 {
  width: 150px;
  height: 150px;
  border: 2px solid white;
  border-radius: 50%;
  top: 10%;
  left: 5%;
  animation-delay: 0s;
}
.shape2 {
  width: 200px;
  height: 200px;
  border: 2px solid white;
  top: 70%;
  left: 80%;
  transform: rotate(45deg);
  animation-delay: 3s;
}
.shape3 {
  width: 300px;
  height: 2px;
  background: white;
  top: 40%;
  left: 30%;
  animation-delay: 6s;
}
.light-beam {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    135deg,
    transparent 30%,
    rgba(255, 255, 255, 0.08) 50%,
    transparent 70%
  );
  animation: beamMove 6s linear infinite;
  pointer-events: none;
}
@keyframes float {
  0% {
    transform: translate(0, 0) rotate(0deg);
  }
  100% {
    transform: translate(30px, -30px) rotate(360deg);
  }
}
@keyframes beamMove {
  0% {
    transform: translate(-50%, -50%) rotate(135deg);
  }
  100% {
    transform: translate(50%, 50%) rotate(135deg);
  }
}