@layer base, layout, components, utilities;

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=Poppins:wght@300;400;500;600&display=swap');

:root {
  --color-red: #E40046;
  --color-gray: #00313C;
  --color-orange: #FF8674;
  --color-white: #FFFFFF;
  --color-bg: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-secondary: #5A6A72;
  --color-border: #E5E8EA;
  --color-header-bg: #FFFFFF;
  --color-header-text: #1A1A1A;
  --color-footer-bg: #FFFFFF;
  --color-footer-text: #1A1A1A;
  --color-code-bg: #F4F6F8;
  --color-alert-info-bg: #E8F4F8;
  --color-alert-info-border: #00313C;
  --color-alert-warning-bg: #FFF0ED;
  --color-alert-warning-border: #FF8674;
  --color-syntax-comment: #6A737D;
  --color-syntax-keyword: #D73A49;
  --color-syntax-string: #032F62;
  --color-syntax-entity: #6F42C1;
  --color-syntax-constant: #005CC5;
  --color-syntax-variable: #E36209;
  --color-syntax-punctuation: #24292E;
  --font-heading: 'DM Sans', sans-serif;
  --font-body: 'Poppins', sans-serif;
  --max-width: 960px;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
}

html.dark-mode {
  --color-bg: #100d0d;
  --color-text: #E0E0E0;
  --color-text-secondary: #A0B0B8;
  --color-border: #3A4A50;
  --color-header-bg: #0D1B20;
  --color-header-text: #E0E0E0;
  --color-footer-bg: #0D1B20;
  --color-footer-text: #E0E0E0;
  --color-red: #FF5C7A;
  --color-syntax-comment: #8B949E;
  --color-syntax-keyword: #FF7B72;
  --color-syntax-string: #A5D6FF;
  --color-syntax-entity: #D2A8FF;
  --color-syntax-constant: #79C0FF;
  --color-syntax-variable: #FFA657;
  --color-syntax-punctuation: #E0E0E0;
  --color-code-bg: #0D1B20;
  --color-alert-info-bg: #1A2A30;
  --color-alert-info-border: #4A8A9A;
  --color-alert-warning-bg: #2A1A18;
  --color-alert-warning-border: #FF8674;
}

@layer base {

  *,
  *::before,
  *::after {
    box-sizing: border-box;
    &:focus-visible {
      outline: dashed var(--color-text);
      outline-offset: 4px;
    }
  }

  html {
    scroll-behavior: smooth;
    scroll-padding-top: 5rem;

    @media screen and (width > 961px) {
      font-size: 118.75%;
    }
  }

  body {
    margin: 0;
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
  }

  h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
  }

  h1 {
    font-size: 2.25rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.375rem;
  }

  h4 {
    font-size: 1.125rem;
  }

  p {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
  }

  a {
    color: var(--color-red);
    text-decoration: underline;
    text-underline-offset: 2px;
  }

  a:hover {
    color: var(--color-orange);
  }

  img {
    display: block;
    margin-block: var(--spacing-md);
    max-width: 100%;
    height: auto;
  }

  code {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.875em;
    padding: 0.125rem 0.375rem;
    background: var(--color-border);
    border-radius: 4px;
  }

  pre code {
    display: block;
    padding: var(--spacing-md);
    overflow-x: auto;
    background: var(--color-code-bg);
    border-radius: 8px;
  }

  blockquote {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md) var(--spacing-lg);
    border-left: 4px solid var(--color-red);
    background: var(--color-border);
    border-radius: 0 8px 8px 0;
  }

  blockquote code {
    background: rgba(255, 255, 255, 0.1);
  }

  ul, ol {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
  }

  li {
    margin-bottom: var(--spacing-xs);
  }

  hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--spacing-xl) 0;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-md);
  }

  th, td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border: 1px solid var(--color-border);
  }

  th {
    background: var(--color-border);
    font-family: var(--font-heading);
    font-weight: 500;
  }

  details {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: 8px;
  }

  summary {
    font-family: var(--font-heading);
    font-weight: 500;
    cursor: pointer;
  }
}

@layer layout {
  .wrapper {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
  }

  .site-header {
    background: var(--color-header-bg);
    color: var(--color-header-text);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
    border-top: 4px solid var(--color-red);
  }

  .site-header .wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
  }

  .site-header .site-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-top: var(--spacing-md);
    color: var(--color-header-text);
  }

  .site-header .site-type {
    font-size: 0.9375rem;
    opacity: 0.8;
  }

  .site-content {
    padding: var(--spacing-xl) 0;
    min-height: 70vh;
  }

  .content-layout {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
  }

  .content-main {
    min-width: 0;
  }

  @media (min-width: 1200px) {
    .content-layout {
      max-width: none;
      padding: 0;
      display: grid;
      grid-template-columns: 1fr minmax(auto, 930px) 1fr;
    }

    .content-main {
      grid-column: 2;
      padding: 0 var(--spacing-md);
    }

    .toc-sidebar {
      grid-column: 1;
      grid-row: 1;
      position: sticky;
      top: var(--spacing-lg);
      justify-self: end;
      width: 300px;
      padding-inline: var(--spacing-md);
      max-height: max-content;
      overflow-y: auto;
    }

    .toc-sidebar .toc {
      border: none;
      background: none;
      padding: 0;
      margin: 0;
    }
  }

  .site-footer {
    background: var(--color-footer-bg);
    color: var(--color-footer-text);
    padding: var(--spacing-lg) 0;
    font-size: 0.9375rem;
    text-align: center;
    border-top: 1px solid var(--color-border);
  }

  .site-footer a {
    color: var(--color-red);
  }

  .site-footer a:hover {
    color: var(--color-gray);
  }

  .footer-simplon-logo {
    height: 1.2em;
    width: auto;
    vertical-align: middle;
    display: inline-block;
  }

  html.dark-mode .footer-simplon-logo {
    filter: brightness(0) invert(1);
  }
}

@layer components {
  .dark-mode-toggle {
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--color-header-text);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    transition: border-color 0.2s;
  }

  .dark-mode-toggle:hover {
    border-color: var(--color-orange);
  }

  .skip-link {
    position: absolute;
    top: -100%;
    left: var(--spacing-md);
    background: var(--color-red);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 100;
  }

  .skip-link:focus {
    top: var(--spacing-sm);
  }

  .breadcrumbs {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9375rem;
    padding: 0.5rem 0;
  }

  .breadcrumbs-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin: 0;
    padding: 0;
  }

  .breadcrumbs-list li {
    margin: 0;
  }

  .breadcrumbs-list li+li::before {
    content: '/';
    margin-right: 0.25rem;
    color: var(--color-text-secondary);
  }

  .breadcrumbs-list a {
    color: var(--color-red);
    text-decoration: none;
  }

  .breadcrumbs-list a:hover {
    text-decoration: underline;
  }

  .breadcrumbs-list [aria-current="page"] {
    color: var(--color-text-secondary);
  }

  .toc {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-alert-info-bg);
    @media (min-width: 1200px) {
      margin-bottom: 0;
    }
  }

  .toc-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 var(--spacing-sm);
    color: var(--color-text);
  }

  .toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .toc-item {
    font-size: 0.9375rem;
    line-height: 1.6;
    padding: 0.125rem 0;
  }

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

  .toc-item a:hover {
    color: var(--color-red);
    text-decoration: underline;
  }

  .toc-item.h3 {
    padding-left: 1rem;
  }

  .toc-item.h4 {
    padding-left: 2rem;
  }

  .toc-item.h5 {
    padding-left: 3rem;
  }

  .toc-item.h6 {
    padding-left: 4rem;
  }

  .toc-item.h3 a {
    font-size: 0.875rem;
  }

  .toc-item.h4 a,
  .toc-item.h5 a,
  .toc-item.h6 a {
    font-size: 0.8125rem;
  }

  .parent-link {
    display: inline-block;
    margin-bottom: var(--spacing-md);
    font-size: 0.9375rem;
    color: var(--color-red);
    text-decoration: none;
  }

  .parent-link:hover {
    text-decoration: underline;
    color: var(--color-orange);
  }

  .youtube-embed {
    position: relative;
    width: 100%;
    max-width: 720px;
    margin: var(--spacing-lg) auto;
    aspect-ratio: 16 / 9;
    border-radius: 8px;
    overflow: hidden;
  }

  .youtube-embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }

  .highlight {
    margin-bottom: var(--spacing-md);
    border-radius: 8px;
    overflow: hidden;
  }

  .highlight {
    position: relative;
  }

  .highlight::before {
    content: attr(data-lang);
    position: absolute;
    top: 0;
    right: 0;
    padding: 0.125rem 0.5rem;
    font-size: 0.8125rem;
    font-family: var(--font-heading);
    color: var(--color-text-secondary);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    border-left: 1px solid var(--color-border);
    border-radius: 0 8px 0 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  .highlight pre {
    margin: 0;
    padding: var(--spacing-md);
    overflow-x: auto;
    background: var(--color-code-bg);
    border-radius: 8px;
    font-size: 0.875rem;
    line-height: 1.5;
  }

  .highlight .c {
    color: var(--color-syntax-comment);
    font-style: italic;
  }

  .highlight .k {
    color: var(--color-syntax-keyword);
  }

  .highlight .o {
    color: var(--color-syntax-keyword);
  }

  .highlight .s {
    color: var(--color-syntax-string);
  }

  .highlight .s2 {
    color: var(--color-syntax-string);
  }

  .highlight .s1 {
    color: var(--color-syntax-string);
  }

  .highlight .nt {
    color: var(--color-syntax-keyword);
  }

  .highlight .na {
    color: var(--color-syntax-constant);
  }

  .highlight .nc {
    color: var(--color-syntax-entity);
  }

  .highlight .nf {
    color: var(--color-syntax-entity);
  }

  .highlight .nx {
    color: var(--color-syntax-constant);
  }

  .highlight .mi {
    color: var(--color-syntax-constant);
  }

  .highlight .mf {
    color: var(--color-syntax-constant);
  }

  .highlight .kd {
    color: var(--color-syntax-keyword);
  }

  .highlight .kt {
    color: var(--color-syntax-keyword);
  }

  .highlight .nb {
    color: var(--color-syntax-variable);
  }

  .highlight .bp {
    color: var(--color-syntax-variable);
  }

  .highlight .nl {
    color: var(--color-syntax-variable);
  }

  .highlight .p {
    color: var(--color-syntax-punctuation);
  }

  .stepper {
    margin-bottom: var(--spacing-lg);
  }

  .stepper details {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
  }

  .stepper details summary {
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 500;
    background: var(--color-code-bg);
    transition: background 0.2s;
    list-style: none;
  }

  .stepper details summary::-webkit-details-marker {
    display: none;
  }

  .stepper details summary::before {
    content: "\25B8";
    margin-right: var(--spacing-sm);
    transition: transform 0.2s;
    display: inline-block;
  }

  .stepper details[open] summary::before {
    transform: rotate(90deg);
  }

  .stepper details summary:hover {
    background: var(--color-border);
  }

.stepper details[open] summary {
  background: var(--color-border);
  border-left: 3px solid var(--color-red);
}

  .stepper .stepper-content {
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .stepper .stepper-content > :last-child {
    margin-bottom: 0;
  }

  .stepper .stepper-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
  }

  .stepper-prev,
  .stepper-next {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 0.875rem;
    cursor: pointer;
    transition: opacity 0.2s, background 0.2s;
  }

  .stepper-prev:hover:not(:disabled),
  .stepper-next:hover:not(:disabled) {
    background: var(--color-border);
  }

  .stepper-prev:disabled,
  .stepper-next:disabled {
    opacity: 0.4;
    cursor: not-allowed;
  }

  .stepper-progress {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-family: var(--font-heading);
  }

  .stepper hr {
    display: none;
  }




@layer utilities {
  .alert-info {
    padding: var(--spacing-md) var(--spacing-lg);
    border-left: 4px solid var(--color-alert-info-border);
    background: var(--color-alert-info-bg);
    border-radius: 0 8px 8px 0;
    margin-bottom: var(--spacing-md);
  }

  .alert-warning {
    padding: var(--spacing-md) var(--spacing-lg);
    border-left: 4px solid var(--color-alert-warning-border);
    background: var(--color-alert-warning-bg);
    border-radius: 0 8px 8px 0;
    margin-bottom: var(--spacing-md);
  }

  .text-center {
    text-align: center;
  }

  .text-end {
    text-align: right;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 0.9375rem;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .site-header .wrapper {
    flex-direction: column;
    text-align: center;
  }

  .site-content {
    padding: var(--spacing-lg) 0;
  }
}