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

body {
  margin: 16px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: #fafafa;
  color: #212121;
  line-height: 1.5;
}
/* task-1 */

#categories {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 400px;
  margin: 0 auto;
}

.item {
  background-color: #f5f5ff;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.05);
  list-style-type: none;
}

.item > h2 {
  font-size: 24px;
  font-weight: 700;
  color: #2c2c2c;
  margin-bottom: 16px;
}

.item ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.item ul li {
  padding: 10px 14px;
  border: 1px solid #b0b0c0;
  border-radius: 6px;
  background-color: #ffffff;
  font-size: 16px;
  color: #333;
}
/* task-2 */

.gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  list-style: none;
  padding: 0;
  margin: 0;
  justify-content: center;
}

.gallery-item {
  flex: 1 1 calc(33.333% - 32px);
  max-width: 300px;
}

.gallery-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  border-radius: 8px;
}

/* task-3 */
body {
  margin: 0;
  padding: 40px;
  font-family: sans-serif;
  background-color: #fafafa;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  position: relative;
}

.name-input {
  padding: 10px 16px;
  font-size: 16px;
  border: 1px solid #ccc;
  border-radius: 6px;
  width: 280px;
  box-sizing: border-box;
  outline: none;
  margin: auto;
}

.name-input:focus {
  border-color: #888;
}

.greeting-title {
  font-size: 24px;
  color: #2d2d3a;
  font-weight: 600;
  margin: 0;
}

.name-output {
  font-weight: 600;
}

.back-link {
  position: absolute;
  top: 20px;
  left: 20px;
  font-size: 14px;
}

a {
  color: #333;
  text-decoration: none;
}
/* task-4 */

.login-form {
  border: 2px solid #007bff;
  padding: 20px;
  width: 300px;
  margin: 0 auto;
  background-color: white;
}

.login-form__label {
  display: block;
  margin-bottom: 15px;
  border: 1px dashed #007bff;
  padding: 10px;
  border-radius: 4px;
}

.login-form__input {
  display: block;
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border: 1px solid #ccc;
  border-radius: 6px;
  box-sizing: border-box;
  font-size: 14px;
}

.login-form__button {
  margin-top: 10px;
  padding: 10px 20px;
  background-color: #2979ff;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}

.login-form__button:hover {
  background-color: #1565c0;
}
/* task-5 */

.color-widget {
  background-color: #ffffff;
  padding: 40px 30px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  text-align: center;
  width: 345px;
  height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 20px;
}

.color-widget__label {
  font-size: 18px;
  color: #333333;
  margin: 0;
}

.color-widget__value {
  font-weight: bold;
}

.color-widget__button {
  padding: 12px 24px;
  background-color: #4d7cff;
  color: #ffffff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.color-widget__button:hover {
  background-color: #3b65d6;
}