/* Background */
body {
  margin: 0;
  padding: 0;
  height: 100vh;
background: linear-gradient(135deg, #fd092a, #6dd5ed, #f16f0c);



  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: 'Segoe UI', sans-serif;
}

/* Header */
header {
  text-align: center;
  color: white;
  margin-top: 30px;
}

header h1 {
  font-size: 36px;
  margin-bottom: 5px;
  color: rgba(14, 3, 3, 0.653);
}

header p {
  font-size: 16px;
  opacity: 0.8;
  color: black;
}

/* Calculator container */
.calculator {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(20px);
  padding: 30px;
  border-radius: 25px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  margin-top: 20px;
  width: 320px;
}

/* Display */
.calculator input {
  width: 90%;
  height: 60px;
  font-size: 28px;
  padding: 10px 15px;
  border-radius: 15px;
  border: none;
  background: rgba(255, 255, 255, 0.3);
  color: white;
  text-align: right;
  margin-bottom: 20px;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.2);
}

/* Buttons Grid */
.buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
}

/* Base Button Styles */
button {
  padding: 20px;
  font-size: 22px;
  font-weight: bold;
  border-radius: 15px;
  border: none;
  color: white;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Number buttons */
button:not(.operator):not(#equal):not(#clear) {
  background: linear-gradient(to bottom right, #29aff7, #d73c8c);
}

/* Operator buttons */
button.operator {
  background: linear-gradient(to bottom right, #ff6a00, #922e5f);
}

/* Equals button */
button#equal {
  background: linear-gradient(to bottom right, #00b09b, #28308b);
}

/* Clear button */
button#clear {
  background: linear-gradient(to bottom right, #a95c69, #cfc723);
}

/* Hover and Active States */
button:hover {
  transform: scale(1.05);
  opacity: 0.95;
}

button:active {
  transform: scale(0.95);
}

/* Footer */
footer {
  color: white;
  text-align: center;
  font-size: 14px;
  margin-top: 30px;
  opacity: 0.6;
}