@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700&display=swap');

:root {
  /* Colors */
  --color-page: #f5f5f5;
  --color-card: #ffffff;
  --color-surface: #f6f6fe;
  --color-text: #2e2f42;
  --color-border: #808080;
  --color-border-active: #000000;
  /* Buttons */
  --color-primary: #4e75ff;
  --color-primary-hover: #6c8cff;
  --color-danger: #ff4e4e;
  --color-danger-hover: #ff7e7e;

  --gap-xs: 8px;
  --gap-sm: 16px;
  --gap-md: 24px;
  --gap-lg: 48px;

  --radius-sm: 4px;
  --radius-md: 8px;

  --panel-width: 486px;

  --font-base: 'Montserrat', sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: var(--gap-md);
  font-family: var(--font-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--color-page);
  color: var(--color-text);
  line-height: 1.5;
}

/* Go back */
body > p {
  margin: 0 0 var(--gap-md);
}

a {
  color: var(--color-primary);
}

/* Task 1 Categories */
#categories {
  list-style: none;
  margin: 0;
  padding: var(--gap-md);
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);

  background-color: var(--color-card);
  border-radius: var(--radius-md);
  width: 392px;
}

#categories .item {
  background-color: var(--color-surface);
  padding: var(--gap-sm);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
}

#categories .item h2 {
  margin: 0;
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
}

#categories .item ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--gap-xs);
}

#categories .item ul li {
  height: 40px;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  background-color: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
}

/* Task 2 Gallery */
.gallery {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-lg) var(--gap-md);
}

.gallery li {
  flex: 0 0 calc((100% - 2 * var(--gap-md)) / 3);
  min-width: 280px;
}

.gallery img {
  display: block;
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: 0;
  transition: transform 300ms ease-in-out;
}

.gallery img:hover {
  transform: scale(1.02);
}

/* Task 3 Form input */
#name-input {
  width: 360px;
  height: 40px;
  padding: 8px 16px;
  font-family: inherit;
  font-size: 16px;
  color: var(--color-text);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 150ms ease-in-out;
}

#name-input:hover,
#name-input:focus {
  border-color: var(--color-border-active);
}

h1 {
  margin: var(--gap-sm) 0 0;
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
}

/* Task 4 Login form */
.login-form {
  width: 408px;
  padding: var(--gap-md);
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
  background-color: var(--color-card);
  border-radius: var(--radius-md);
}

.login-form label {
  display: flex;
  flex-direction: column;
  gap: var(--gap-xs);
  font-size: 16px;
  color: var(--color-text);
}

.login-form input {
  height: 40px;
  padding: 8px 16px;
  font-family: inherit;
  font-size: 16px;
  color: var(--color-text);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 150ms ease-in-out;
}

.login-form input:hover,
.login-form input:focus {
  border-color: var(--color-border-active);
}

.login-form button {
  align-self: flex-start;
  padding: 8px 16px;
  min-width: 86px;
  height: 40px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 500;
  color: #ffffff;
  background-color: var(--color-primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color 150ms ease-in-out;
}

.login-form button:hover,
.login-form button:focus {
  background-color: var(--color-primary-hover);
}

/* Task 5 Widget */
.widget {
  display: inline-flex;
  flex-direction: column;
  gap: var(--gap-sm);
  padding: var(--gap-md);
  background-color: var(--color-card);
  border-radius: var(--radius-md);
}

.widget p {
  margin: 0;
  font-size: 16px;
  color: var(--color-text);
}

.change-color {
  align-self: flex-start;
  padding: 8px 16px;
  height: 40px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 500;
  color: #ffffff;
  background-color: var(--color-primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color 150ms ease-in-out;
}

.change-color:hover,
.change-color:focus {
  background-color: var(--color-primary-hover);
}

/* Task 6 Boxes */
#controls {
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
  width: var(--panel-width);
  padding: 32px;
  margin-bottom: var(--gap-sm);
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
}

#controls input[type='number'] {
  width: 150px;
  height: 40px;
  padding: 8px 16px;
  font-family: inherit;
  font-size: 16px;
  color: var(--color-text);
  background-color: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color 150ms ease-in-out;
}

#controls input[type='number']:hover,
#controls input[type='number']:focus {
  border-color: var(--color-border-active);
}

#controls button {
  height: 40px;
  min-width: 120px;
  padding: 8px 16px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 500;
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color 150ms ease-in-out;
}

#controls button[data-create] {
  background-color: var(--color-primary);
}
#controls button[data-create]:hover,
#controls button[data-create]:focus {
  background-color: var(--color-primary-hover);
}

#controls button[data-destroy] {
  background-color: var(--color-danger);
}
#controls button[data-destroy]:hover,
#controls button[data-destroy]:focus {
  background-color: var(--color-danger-hover);
}

#boxes {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 44px;
  width: var(--panel-width);
  padding: 32px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  min-height: 60px;
}

#boxes div {
  border-radius: 0;
  flex-shrink: 0;
}