/* Basic styles */
:root {
  --primary: #4f46e5;
  --accent: #06b6d4;
  --muted: #6b7280;
  /* --bg: #f8fafc; */
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html,
body {
  height: 100%;
}
body {
  font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
  /* background: var(--bg); */
  background: linear-gradient(315deg, rgb(98, 98, 214) 0%, rgb(182, 182, 212) 50%, rgb(180, 180, 243) 100%);
  font-size: 20px;
  color: #111827;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}
.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  max-width: 540px;
}
.header {
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
label {
  font-weight: 600;
  color: #111827;
}
input[type="number"] {
  padding: 0.5rem 0.75rem;
  border: 1px solid #99bcf1;
  border-radius: 6px;
  width: 120px;
}
.box-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}
#box1,
#box2,
#box3,
#box4 {
  width: 100px;
  height: 100px;
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: 8px;
  margin-top: 1%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  background: #41b2e2;
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease;
}
#box1:hover,
#box2:hover,
#box3:hover,
#box4:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(16, 24, 40, 0.08);
}
#result {
  margin-top: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  background: #eef2ff;
  color: var(--primary);
  font-weight: 700;
}
@media (max-width: 480px) {
  #box1,
  #box2,
  #box3,
  #box4 {
    width: 80px;
    height: 80px;
    font-size: 1rem;
  }
  .container {
    padding: 1rem;
  }
}