style.css

:root {
  --primary-color: linear-gradient(135deg, #6366f1, #4f51e5);
  --primary-hover: linear-gradient(135deg, #8183f9, #6366f1);
  --bg-color: hsl(250, 60%, 99%);
  --container-bg: #ffffff;
  --border-color: #e2e8f0;
  --grid-item-color: #ffffff;
  --text-color: #1e293b;
}

[data-theme='dark'] {
  --primary-color: linear-gradient(135deg, #6366f1, #4f51e5);
  --primary-hover: linear-gradient(135deg, #8183f9, #6366f1);
  --bg-color: #0f172a;
  --container-bg: #1e293b;
  --border-color: #334155;
  --grid-item-color: #1e293b;
  --text-color: #f8fafc;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  background-color: var(--bg-color);
  font-family: 'Segoe UI', system-ui, sans-serif;
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
}

.theme-toggle {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  transition: transform 0.3s;
}

h1,
.controlSize h3 {
  background: linear-gradient(135deg, #7c3aed, #6366f1, #4338ca);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-align: center;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-shadow: 2px 2px 4px rgba(99, 102, 241, 0.1);
  animation: gradient 2s ease infinite;
  background-size: 200% 200%;
}

@keyframes gradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.controlSize {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  align-items: center;
  background-color: var(--container-bg);
  padding: 0.5rem;
  margin-top: 1rem;
  border-radius: 1rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

input[type='range'] {
  accent-color: #6366f1;
  cursor: pointer;
}

input[type='range']:hover {
  accent-color: #4f51e5;
}

.controlSize output {
  color: #6366f1;
  font-size: large;
  font-weight: bold;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.buttons {
  display: flex;
  flex-direction: row;
  justify-content: center;
  flex-wrap: wrap;
  align-items: center;
  margin: 2rem 0 1rem 0;
}

button {
  background: var(--primary-color);
  border: none;
  color: white;
  padding: 0.75rem 1.5rem;
  text-align: center;
  font-size: 1rem;
  margin: 1rem;
  cursor: pointer;
  border-radius: 0.5rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: all 0.2s ease-in-out;
}

button:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.color-picker {
  margin: 0 1rem;
  width: 3rem;
  height: 3rem;
  padding: 0;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  overflow: hidden;
  background-color: var(--bg-color);
}

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--container-bg);
  flex-wrap: wrap;
  width: min(520px, 90vw);
  height: min(520px, 90vw);
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-radius: 2rem;
  overflow: hidden;
  margin: 1rem;
}

.grid-item {
  background-color: var(--grid-item-color);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.2s ease;
  box-sizing: border-box;
  height: 100%;
  width: 100%;
}

.grid-item:hover {
  transform: scale(1.05);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.made {
  padding: 1rem ;
  text-align: center;
}
.made a > i {
  font-size: larger;
}

.made a {
  color: #6366f1;
  text-decoration: none;
  font-weight: bold;
  padding: 0.3rem;
}

.made a:hover {
  color: #4f51e5;
  text-decoration: underline;
}

@media (max-width: 768px) {
  h1 {
    font-size: 1.8rem;
    margin: 2rem 1rem;
  }

  .controlSize {
    padding: 0.5rem;
    margin: 1rem;
    width: 90%;
  }

  .controlSize h3 {
    font-size: 1rem;
  }

  .buttons {
    gap: 0.5rem;
    margin: 1rem;
  }

  button {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    margin: 0.5rem;
  }

  .color-picker {
    width: 2.5rem;
    height: 2.5rem;
  }

  footer {
    font-size: 0.9rem;
    padding: 0.5rem;
  }
}

@media (max-width: 480px) {
  .theme-toggle {
    top: 0.5rem;
    right: 0.5rem;
    font-size: 1.2rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  .buttons {
    flex-direction: column;
    align-items: stretch;
    width: 90%;
    max-width: 300px;
  }

  button,
  .color-picker {
    margin: 0.3rem 0;
  }

  .color-picker {
    align-self: center;
  }
}