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

body {
  background: #1b1b1b;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  font-family: "Poppins", Arial, sans-serif;
}

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 20px;
}

.big-box {
  display: grid;
  grid-template-columns: repeat(35, 22px);
  grid-template-rows: repeat(35, 22px);
  background: #111111;
  padding: 10px;
  border-radius: 15px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.7);
  transition: all 0.3s ease;
}

.box {
  border-radius: 4px;
  background: #1b1b1b;
  border: 1px solid #333;
  cursor: pointer;
  transition: all 0.15s ease-in-out;
}

.box:hover {
  transform: scale(1.1);
  box-shadow: 0 0 10px #00fff7, 0 0 20px #00fff7;
}

.controls {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 15px;
}

.color-btn,
.clear-btn {
  padding: 10px 20px;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  color: white;
  transition: all 0.2s ease-in-out;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.color-btn:hover,
.clear-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 15px currentColor, 0 0 25px currentColor;
}

.red {
  background-color: #ff073a;
}
.blue {
  background-color: #578cb5;
}
.green {
  background-color: #4fa833;
}

.clear-btn {
  background-color: #ff5c00;
}

@media (max-width: 900px) {
  .big-box {
    grid-template-columns: repeat(35, 16px);
    grid-template-rows: repeat(35, 16px);
  }
}

@media (max-width: 500px) {
  .big-box {
    grid-template-columns: repeat(35, 12px);
    grid-template-rows: repeat(35, 12px);
  }

  .color-btn,
  .clear-btn {
    font-size: 14px;
    padding: 8px 14px;
  }
}