html,
body {
  padding: 0;
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen,
    Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

* {
  box-sizing: border-box;
}

main {
  min-height: 100vh;
  padding: 4rem 2rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.title {
  margin: 0;
  line-height: 1.15;
  font-size: 4rem;
}

.title,
.description {
  text-align: center;
}

.description {
  margin: 4rem 0;
  line-height: 1.5;
  font-size: 1.5rem;
}

.code {
  background: #fafafa;
  border-radius: 5px;
  padding: 0.75rem;
  font-size: 1.1rem;
  font-family: Menlo, Monaco, Lucida Console, Liberation Mono, DejaVu Sans Mono,
    Bitstream Vera Sans Mono, Courier New, monospace;
}

.grid {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 800px;
}

.card {
  margin: 1rem;
  padding: 1.5rem;
  text-align: left;
  color: inherit;
  text-decoration: none;
  border: 1px solid #eaeaea;
  border-radius: 10px;
  transition: color 0.15s ease, border-color 0.15s ease;
  max-width: 300px;
}

.card:hover,
.card:focus,
.card:active {
  color: #0070f3;
  border-color: #0070f3;
}

.card h2 {
  margin: 0 0 1rem 0;
  font-size: 1.5rem;
}

.card p {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.5;
}

@media (max-width: 600px) {
  .grid {
    width: 100%;
    flex-direction: column;
  }
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen,
    Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
  background: #f5f5f5;
}

main {
  min-height: 100vh;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

h1 {
  color: #333;
  margin-bottom: 2rem;
}

.input-container, .adjust-container {
  display: flex;
  gap: 2rem;
  margin-bottom: 2rem;
  align-items: center;
}

.adjust-container button {
  padding: 0.5rem 1rem;
  font-size: 1rem;
  border: none;
  border-radius: 4px;
  background: #0070f3;
  color: white;
  cursor: pointer;
  transition: background 0.3s ease;
}

.adjust-container button:hover {
  background: #0051b3;
}

.add-number-btn {
  padding: 0.5rem 1rem;
  font-size: 1rem;
  border: none;
  border-radius: 4px;
  background: #28a745;
  color: white;
  cursor: pointer;
  margin-bottom: 1rem;
  transition: background 0.3s ease;
}

.add-number-btn:hover {
  background: #218838;
}

.number-input {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

input[type="number"] {
  padding: 0.5rem;
  font-size: 1.2rem;
  width: 150px;
  border: 2px solid #ddd;
  border-radius: 4px;
}

.visualization-selector {
  margin-bottom: 1rem;
}

.visualization-selector select {
  padding: 0.5rem;
  font-size: 1rem;
  border-radius: 4px;
  border: 2px solid #ddd;
}

.visualization {
  display: flex;
  gap: 2rem;
  margin: 2rem 0;
  width: 100%;
  max-width: 800px;
  position: relative;
  min-height: 400px;
}

.visualization[data-type="overlapping"] .number-display {
  position: relative;
  width: 100%;
}

.visualization[data-type="overlapping"] .rectangle {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0.7;
}

.visualization[data-type="overlapping"] .value {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}



.number-display {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.rectangle {
  width: 100%;
  background: #0070f3;
  transition: height 0.3s ease;
  border-radius: 4px;
}

.value {
  font-size: 1.5rem;
  font-weight: bold;
  color: #333;
}

.comparison {
  font-size: 1.2rem;
  color: #666;
  margin-top: 1rem;
  text-align: center;
}

footer {
  text-align: center;
  padding: 2rem;
  color: #666;
  font-size: 0.9rem;
}

footer a {
  color: #0070f3;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}