* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  display: flex;
  color-scheme: light dark;
  font-size: var(--font-size-base);
  background-color: var(--color-bg-1);
  color: var(--color-text);
}

:root {
  --font-size-small: 12px;
  --font-size-base: 14px;
  --font-size-large: 16px;
  --font-size-xlarge: 18px;

  --color-primary-100: #d6e9fa;
  --color-primary-200: #add3f5;
  --color-primary-300: #84bdf0;
  --color-primary-400: #5ba7eb;
  --color-primary-500: #3291e6;
  --color-primary-600: #1e76cc;
  --color-primary-700: #165ca0;
  --color-primary-800: #0f4175;
  --color-primary-900: #072749;

  --color-bg-50: #f9f9f9;
  --color-bg-100: #e6e6e6;
  --color-bg-200: #cccccc;
  --color-bg-300: #b3b3b3;
  --color-bg-400: #999999;
  --color-bg-500: #808080;
  --color-bg-600: #737373;
  --color-bg-700: #5c5c5c;
  --color-bg-800: #404040;
  --color-bg-900: #262626;
  --color-bg-1000: #0d0d0d;

  --color-black: #000000;
  --color-white: #ffffff;
}

[theme=light] {
  --color-text: var(--color-bg-900);
  --color-title: var(--color-primary-500);
  --color-border: var(--color-bg-200);
  --color-bg-1: var(--color-white);
  --color-bg-2: var(--color-bg-100);
  --color-btn-primary: var(--color-primary-700);

  /* Switch */
  --color-switch-theme-bg: var(--color-bg-200);
  --color-switch-theme-bg-checked: var(--color-primary-800);
}

[theme=dark] {
  --color-text: var(--color-bg-100);
  --color-title: var(--color-primary-400);
  --color-border: var(--color-bg-200);
  --color-bg-1: var(--color-bg-700);
  --color-bg-2: var(--color-bg-800);
  --color-btn-primary: var(--color-primary-500);

  /* Switch */
  --color-switch-theme-bg: var(--color-bg-900);
  --color-switch-theme-bg-checked: var(--color-bg-500);
}

.container {
  display: grid;
  grid-template-columns: 250px 1fr;
}

.sidebar {
  background: var(--color-bg-2);
  padding: 1rem;
  overflow-y: auto;

  .sidebar__top--center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .5rem;
    margin-bottom: 1rem;
  }

  h3 {
    border-bottom: 1px solid var(--color-border);
  }

  ul {
    list-style: none;
    padding: 0;
  }

  li {
    margin-bottom: 0.5rem;
    font-size: var(--font-size-base);
  }

  a {
    color: var(--color-text);
    text-decoration: none;
  }

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

h1, h2, h3, h4, h5, h6 {
  color: var(--color-title);
  margin: .5rem 0;
}


.main-content {
  padding: 1rem;
}

pre {
  background: var(--color-bg-2);
  padding: .5rem;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 12px;

  code {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  }
}

.switch-theme {
  position: relative;
  cursor: pointer;

  .switch-theme__check {
    position: relative;
    top: 0;
    left: 0;
    width: 70px;
    height: 35px;
    display: inline-block;
    background-color: var(--color-switch-theme-bg);
    border-radius: 32px;
  }

  svg {
    position: relative;
    top: 7.5px;
    left: 7.5px;
    width: 20px;
    height: 20px;
  }


  .switch-theme__check::before {
    position: absolute;
    top: 5px;
    left: 5px;
    content: '';
    display: block;
    width: 25px;
    height: 25px;
    background-color: var(--color-switch-theme-bg-checked);
    border-radius: 50%;
    transition: all .5s ease;
  }

  input[type=checkbox] {
    display: none;
  }

  input[type=checkbox]:checked + .switch-theme__check::before {
    transform: translateX(35px);
  }

  input[type=checkbox]:checked + .switch-theme__check svg {
    transform: translateX(35px);
  }
}