/*

  STYLESHEET STRUCTURE
  ================================================================
  This stylesheet is organized from the most generic to the most specific rules.

  1. SETTINGS....: Global variables (CSS Custom Properties) for colors, fonts, spacing.
  2. BASE........: Default styles for basic HTML elements (scoped under .prose).
  3. LAYOUT......: Styles for major page layout containers (.container, .content-wrapper).
  4. COMPONENTS..: Styling for individual, reusable components (.article-date, .copy-button, etc.).
  5. RESPONSIVE..: Media queries that override previous rules for different screen sizes.

*/


/*
|--------------------------------------------------------------------------
| SETTINGS: Global Variables
|--------------------------------------------------------------------------
| Using CSS Custom Properties makes the design system explicit,
| prevents magic numbers, and makes future theme changes trivial.
*/
:root {
  /* Colors */
  --color-brand-primary: #10b981;
  --color-brand-secondary: #34d399;

  --color-bg-primary: #111827;
  --color-bg-secondary: #1f2937;
  --color-bg-tertiary: #2d3748;
  --color-bg-accent: #374151;
  --color-bg-subtle-accent: rgba(31, 41, 55, .5);
  --color-bg-toc: rgba(17, 24, 39, .6);

  --color-text-base: #d1d5db;
  --color-text-muted: #9ca3af;
  --color-text-heading: #e5e7eb;
  --color-text-heading-hover: #f9fafb;
  --color-text-subtle: #6b7280;

  /* Typography */
  --font-family-sans: 'Roboto Flex', sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Roboto Flex', monospace;

  --font-size-xs: .75rem;
  --font-size-sm: .875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Spacing & Sizing */
  --spacing-xs: .25rem;
  --spacing-sm: .5rem;
  --spacing-md: .75rem;
  --spacing-lg: 1rem;
  --spacing-xl: 1.25rem;
  --spacing-2xl: 1.5rem;
  --spacing-3xl: 2rem;
  --spacing-4xl: 2.5rem;
  --main-content-width: 650px;

  /* Borders */
  --border-radius-sm: .25rem;
  --border-radius-md: .375rem;
  --border-radius-full: 50%;
  --border-color: var(--color-bg-accent);

  /* Transitions */
  --transition-fast: .2s;
  --transition-medium: .3s;
}


/*
|--------------------------------------------------------------------------
| BASE: Scoped Element Defaults
|--------------------------------------------------------------------------
| These are the default styles for raw HTML elements when they appear
| inside a `.prose` container.
*/
.prose :is(h2, h3) {
  scroll-margin-top: var(--spacing-3xl);
}

.prose :is(a, h2, h3, h4, h5, h6) {
  transition: color var(--transition-fast) ease-in-out;
}

.prose :is(p, ul, ol, blockquote, table, pre) {
  margin-bottom: var(--spacing-xl);
}

.prose p {
  color: var(--color-text-base);
  overflow-wrap: break-word;
  word-break: keep-all;
  /* As per original CSS */
}

.prose a {
  color: var(--color-brand-secondary);
  text-decoration: none;
}

.prose a:hover {
  color: var(--color-brand-primary);
  text-decoration: underline;
}

.prose :is(ul, ol) {
  padding-left: var(--spacing-2xl);
  color: var(--color-text-base);
}

.prose :is(ul, ol) li {
  margin-bottom: var(--spacing-sm);
}

.prose ul {
  list-style-type: disc;
}

.prose ol {
  list-style-type: decimal;
}

.prose :is(h1, h2, h3, h4, h5, h6, pre) {
  position: relative;
}

.prose h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-xs);
  letter-spacing: -.025em;
  background: linear-gradient(to right, var(--color-text-heading-hover), var(--color-brand-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.prose h1::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 4rem;
  height: 2px;
  background-color: var(--color-brand-primary);
  transition: width var(--transition-medium) ease-in-out;
}

.prose h1:hover::after {
  width: 6rem;
}

/* Common heading styles using :is() for brevity */
.prose :is(h2, h3, h4, h5, h6) {
  font-weight: var(--font-weight-semibold);
  padding-left: var(--spacing-sm);
  border-left: 4px solid var(--color-brand-secondary);
}

.prose :is(h2, h3, h4, h5, h6):hover {
  color: var(--color-text-heading-hover);
}

.prose h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: .875rem;
  color: var(--color-text-heading);
}

.prose h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-base);
  border-left-color: rgba(52, 211, 153, 0.8);
}

.prose h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
  color: #cbd5e1;
  border-left-color: rgba(52, 211, 153, 0.7);
}

.prose h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  color: #c4d1de;
  border-left-color: rgba(52, 211, 153, 0.6);
}

.prose h6 {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-md);
  color: #bcc8d8;
  border-left-color: rgba(52, 211, 153, 0.5);
}


/*
|--------------------------------------------------------------------------
| LAYOUT
|--------------------------------------------------------------------------
| Styles for major page layout containers.
*/
.container {
  max-width: 100%;
  padding: 0 var(--spacing-lg);
}

.main-content {
  width: 100%;
  max-width: var(--main-content-width);
  margin: 0 auto;
  padding-top: var(--spacing-3xl);
}


/*
|--------------------------------------------------------------------------
| COMPONENTS
|--------------------------------------------------------------------------
| Styling for individual, self-contained UI elements.
*/

/* --- Article Metadata --- */
.article-metadata {
  position: relative;
  margin: -0.5rem 0 var(--spacing-4xl);
  overflow: hidden;
}

.article-date {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-subtle-accent);
  border-radius: var(--border-radius-sm);
  border-left: 2px solid var(--color-brand-primary);
  font-family: var(--font-family-sans);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  letter-spacing: .05em;
  box-shadow: 0 1px 2px rgba(0, 0, 0, .1);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: var(--transition-medium);
}

.article-date:hover {
  color: var(--color-text-heading-hover);
  border-left-color: var(--color-brand-secondary);
  transform: translateX(3px);
}

.article-date::before {
  content: '';
  display: inline-block;
  width: var(--spacing-md);
  height: var(--spacing-md);
  margin-right: var(--spacing-sm);
  background-color: var(--color-brand-primary);
  border-radius: var(--border-radius-full);
  opacity: .8;
  transform: scale(.8);
  transition: transform var(--transition-medium), opacity var(--transition-medium);
}

.article-date:hover::before {
  transform: scale(1);
  opacity: 1;
}

/* --- Blockquote --- */
.prose blockquote {
  padding: var(--spacing-lg) var(--spacing-2xl);
  background-color: var(--color-bg-secondary);
  color: var(--color-text-base);
  font-style: italic;
  border-left-width: 4px;
  border-left-color: var(--color-brand-secondary);
  box-shadow: 0 2px 4px rgba(0, 0, 0, .2);
}

/* --- Code Blocks --- */
.prose code {
  font-family: var(--font-family-mono);
}

.prose code:not(pre code) {
  display: inline-block;
  color: var(--color-brand-secondary);
  white-space: nowrap;
}

.prose pre {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-base);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, .2);
  line-height: 1.5;
  overflow-x: auto;
}

.copy-button {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: #4b5563;
  color: var(--color-text-base);
  border: none;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  cursor: pointer;
  transition: var(--transition-fast);
  opacity: .7;
  z-index: 10;
}

.copy-button:hover {
  background-color: #6b7280;
  color: var(--color-text-heading-hover);
  opacity: 1;
}

.copy-button:focus {
  outline: 0;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, .5);
}

.copy-button.copied {
  background-color: var(--color-brand-primary);
  color: var(--color-text-heading-hover);
}

.copy-button .icon {
  width: 14px;
  height: 14px;
}

.copy-button .check-icon {
  display: none;
}

.copy-button .copy-icon {
  display: inline;
}

.copy-button.copied .check-icon {
  display: inline;
}

.copy-button.copied .copy-icon {
  display: none;
}

/* --- Tables --- */
.prose table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-bg-secondary);
  box-shadow: 0 2px 4px rgba(0, 0, 0, .2);
}

.prose th,
.prose td {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  color: var(--color-text-base);
}

.prose th {
  background-color: var(--color-bg-accent);
  color: var(--color-text-heading-hover);
  font-weight: var(--font-weight-semibold);
}

.prose tr:nth-child(2n) td {
  background-color: var(--color-bg-tertiary);
}

.prose tr:hover td {
  background-color: var(--color-brand-primary);
  color: var(--color-bg-primary);
  transition: background-color var(--transition-fast) ease-in-out, color var(--transition-fast) ease-in-out;
}

/* --- Table of Contents --- */
/* Default mobile-first state: Hide the TOC. It will be shown via media query on larger screens. */
.toc-container {
  display: none;
}


/*
|--------------------------------------------------------------------------
| RESPONSIVE OVERRIDES
|--------------------------------------------------------------------------
| Adjustments for different screen sizes, ordered from large to small.
*/

/* --- Desktop Layout: Content + Table of Contents --- */
@media (min-width: 1024px) {
  .container {
    max-width: 88%;
    padding: 0;
    margin: 0 auto;
  }

  .content-wrapper {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 250px;
    gap: var(--spacing-3xl);
    position: relative;
    padding-top: var(--spacing-4xl);
    max-width: 1200px;
    margin: 0 auto;
  }

  .main-content {
    max-width: var(--main-content-width);
    padding-top: 0;
    margin: 0;
  }

  .toc-container {
    display: block;
    /* This now overrides the default 'display: none' */
    width: 250px;
    position: sticky;
    top: 5rem;
    align-self: flex-start;
    max-height: calc(100vh - 8rem);
    overflow-y: auto;
    padding: var(--spacing-xl);
    background-color: var(--color-bg-toc);
    border-radius: var(--border-radius-sm);
    border-left: 2px solid rgba(16, 185, 129, .6);
    margin-top: var(--spacing-3xl);
  }

  .toc-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-heading);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid rgba(75, 85, 99, .4);
    letter-spacing: .05em;
  }

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

  .toc-list li {
    margin-bottom: .375rem;
    line-height: 1.4;
  }

  .toc-list a {
    display: inline-block;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: color var(--transition-fast);
    padding: .15rem 0;
  }

  .toc-list a:hover {
    color: var(--color-text-base);
  }

  .toc-list a.active {
    color: rgba(16, 185, 129, .8);
    font-weight: var(--font-weight-normal);
  }

  .toc-h3 {
    padding-left: var(--spacing-lg);
    font-size: .8125rem;
    color: var(--color-text-subtle);
  }
}

@media (min-width: 1280px) {
  .content-wrapper {
    max-width: 1300px;
  }

  :root {
    --main-content-width: 680px;
  }
}

@media (min-width: 1536px) {
  .container {
    max-width: 92%;
  }

  .content-wrapper {
    max-width: 1500px;
    grid-template-columns: minmax(0, 1fr) 280px;
  }

  .toc-container {
    width: 280px;
    margin-top: var(--spacing-4xl);
  }

  :root {
    --main-content-width: 700px;
  }
}

/* --- Tablet Responsive Table: Horizontal Scroll --- */
@media (max-width: 1023px) {
  .prose table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* --- Mobile Responsive Table: Stacked Card View --- */
@media (max-width: 640px) {
  .prose table {
    display: block;
    border-collapse: separate;
    border-spacing: 0;
    box-shadow: none;
  }

  .prose table thead {
    display: none;
  }

  .prose table tr {
    display: block;
    margin-bottom: var(--spacing-2xl);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    box-shadow: 0 1px 3px rgba(0, 0, 0, .2);
    background-color: var(--color-bg-secondary);
    overflow: hidden;
  }

  .prose table tr:last-child {
    margin-bottom: 0;
  }

  .prose table tbody,
  .prose table td {
    display: block;
    width: 100%;
    text-align: left;
  }

  .prose td {
    white-space: normal;
    overflow-wrap: break-word;
    border: none;
    border-bottom: 1px solid var(--color-bg-tertiary);
    padding: var(--spacing-md);
    color: var(--color-text-base);
  }

  .prose td:last-child {
    border-bottom: none;
  }

  .prose td::before {
    content: attr(data-label);
    display: block;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: var(--spacing-xs);
  }
}