*{
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  text-align: center;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(1200px 800px at 20% 10%, rgba(50,140,255,0.25), transparent 55%),
    radial-gradient(1000px 700px at 80% 20%, rgba(255,70,210,0.22), transparent 55%),
    radial-gradient(900px 700px at 50% 90%, rgba(0,255,170,0.18), transparent 60%),
    linear-gradient(180deg, #070a14, #0b1020);
}

#level-title {
  font-family: 'Press Start 2P', cursive;
  font-size: clamp(1rem, 2.5vw, 2rem);
  margin: 0 0 18px 0;
  color: rgba(255,255,255,0.92);
  line-height: 1.4;
  text-shadow: 0 6px 18px rgba(0,0,0,0.45);
}

/* Board */
.container {
  width: min(520px, 100%);
  padding: 22px 18px;
  margin: 0 auto;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 18px 60px rgba(0,0,0,0.45);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.row{
  display: flex;
  justify-content: center;
  gap: 18px;
  margin: 14px 0;
}

/* Buttons */
.btn {
  margin: 0;
  width: min(180px, 34vw);
  height: min(180px, 34vw);
  display: inline-block;
  border-radius: 26px;
  border: 2px solid rgba(255,255,255,0.14);
  box-shadow: 0 14px 40px rgba(0,0,0,0.35);
  cursor: pointer;
  position: relative;
  overflow: hidden;

  transition: transform 0.08s ease, box-shadow 0.08s ease, filter 0.08s ease, opacity 0.08s ease;
}

/* Gloss overlay */
.btn::after{
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.35), transparent 45%);
  opacity: 0.35;
  pointer-events: none;
}

/* Better colors */
.red {
  background: linear-gradient(180deg, #ff4d4d, #d6002f);
}

.green {
  background: linear-gradient(180deg, #49ffb2, #00b36b);
}

.blue {
  background: linear-gradient(180deg, #4ea1ff, #1d4ed8);
}

.yellow {
  background: linear-gradient(180deg, #ffe066, #f59e0b);
}

/* Hover */
.btn:hover{
  transform: translateY(-3px);
  filter: brightness(1.05);
  box-shadow: 0 18px 60px rgba(0,0,0,0.45);
}

/* Pressed animation */
.pressed {
  transform: scale(0.95);
  filter: brightness(1.25);
  opacity: 0.92;
  box-shadow: 0 0 35px rgba(255,255,255,0.25);
}

/* Game Over */
.game-over {
  background:
    radial-gradient(800px 500px at 50% 30%, rgba(255, 0, 70, 0.35), transparent 60%),
    linear-gradient(180deg, #12000a, #070a14);
}

.controls{
  margin-top: 18px;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.control-btn{
  font-family: "Press Start 2P", system-ui, sans-serif;
  font-size: 0.7rem;
  padding: 14px 16px;
  border-radius: 16px;
  cursor: pointer;

  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.16);
  color: rgba(255,255,255,0.92);

  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
  transition: transform 120ms ease, filter 120ms ease;
}

.control-btn:hover{
  transform: translateY(-2px);
  filter: brightness(1.08);
}

.control-btn:active{
  transform: scale(0.98);
}

.control-btn.danger{
  background: rgba(255, 70, 70, 0.12);
  border: 1px solid rgba(255, 70, 70, 0.35);
}

body{
  transition: background 0.18s ease;
}

body.flash-red{
  background:
    radial-gradient(900px 600px at 50% 30%, rgba(255, 60, 60, 0.35), transparent 60%),
    linear-gradient(180deg, #070a14, #0b1020);
}

body.flash-green{
  background:
    radial-gradient(900px 600px at 50% 30%, rgba(0, 255, 170, 0.28), transparent 60%),
    linear-gradient(180deg, #070a14, #0b1020);
}

body.flash-blue{
  background:
    radial-gradient(900px 600px at 50% 30%, rgba(80, 150, 255, 0.30), transparent 60%),
    linear-gradient(180deg, #070a14, #0b1020);
}

body.flash-yellow{
  background:
    radial-gradient(900px 600px at 50% 30%, rgba(255, 220, 100, 0.25), transparent 60%),
    linear-gradient(180deg, #070a14, #0b1020);
}