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

/* Body background and font */
body {
  background-color: #4169e1;
  background-image: url(blue-background.jpg);
  background-position: left;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  text-transform: uppercase;
  color: #e0f7fa;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-size: cover;
  font-family: "Audiowide", sans-serif;
  font-weight: 400;
  font-style: normal
}

/* Container to center everything */
.container {
  text-align: center;
  background: rgba(255, 255, 255, 0.1);
  padding: 20px 30px 30px;
  border-radius: 15px;
  box-shadow: 0 0 30px rgba(0,0,0,0.6);
  user-select: none;
}

/* Heading */
h1 {
  margin-bottom: 30px;
  font-weight: 700;
  letter-spacing: 3px;
  text-shadow: 0 0 8px #81d4fa;
}

/* Canvas styling */
#tetris {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.12));
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(135,206,235,0.7);
  display: block;
  margin: 0 auto 20px;
  image-rendering: pixelated;
}

/* Controls container */
.controls {
  margin-bottom: 15px;
}

/* Buttons */
button {
  background: rgba(255, 255, 255, 0.15);
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 8px;
  color: #e0f7fa;
  font-weight: 600;
  padding: 10px 18px;
  margin: 20px 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 0 5px rgba(135,206,235,0.5);
  font-family: "Audiowide", sans-serif;
  font-weight: 400;
  font-style: normal
}

button:hover {
  background: rgba(255, 255, 255, 0.3);
  box-shadow: 0 0 12px rgba(135,206,235,0.9);
}

/* Scoreboard */
.score-board {
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-shadow: 0 0 4px #81d4fa;
  margin-bottom: 30px;
}

/* Game Over overlay */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(3, 8, 10, 0.9);
  display: flex;
  justify-content: center;
  align-items: center;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 100;
}

.overlay.visible {
  visibility: visible;
  opacity: 1;
}

.game-over-content {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 30px 40px;
  box-shadow: 0 0 20px rgba(135,206,235,0.8);
  text-align: center;
  color: #e0f7fa;
}

.game-over-content h2 {
  margin-bottom: 20px;
  font-size: 2rem;
  letter-spacing: 3px;
  text-shadow: 0 0 8px #81d4fa;
}

.game-over-content button {
  font-size: 1.2rem;
  padding: 12px 30px;
  border: 2px solid #81d4fa;
  background: transparent;
  color: #81d4fa;
  box-shadow: 0 0 10px #81d4fa;
}

.game-over-content button:hover {
  background: #81d4fa;
  color: #002f4b;
  box-shadow: 0 0 15px #42a5f5;
}

.instructions{
  display: inline-block;
  width: 22%;
  margin-bottom: 20px;
}

h2{
  font-size: 0.95em;
  letter-spacing: 1px;
  text-shadow: 0 0 8px #81d4fa;
  margin-bottom: 30px;
  margin-top: 30px;
}

h3, p{
  font-size: 0.8em;
  letter-spacing: 1px;
  text-shadow: 0 0 8px #81d4fa;
}

p{
  margin-top: 3px;
}