/* Hylographic - Tschichold-inspired minimal blog styling */

:root {
  /* Colors - restrained palette */
  --color-text: #1a1a1a;
  --color-text-secondary: #666;
  --color-background: #fff;
  --color-accent: #0066cc;  /* For links and data viz */
  --color-border: #e5e5e5;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;

  /* Spacing - generous white space */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;

  /* Layout */
  --max-width-content: 42rem;
  --max-width-wide: 60rem;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-background);
}

/* App container */
.hylographic {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header - minimal, understated */
.hylographic__header {
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.hylographic__header h1 {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

.hylographic__header a:hover {
  color: var(--color-accent);
}

/* Main content area */
.hylographic__main {
  flex: 1;
  padding: var(--space-xl);
  max-width: var(--max-width-wide);
  margin: 0 auto;
  width: 100%;
}

/* L-System background plant */
.lsystem-background {
  position: fixed;
  bottom: 0;
  left: -50vw;
  z-index: -1;
  pointer-events: none;
  opacity: 0.25;
}

.lsystem-background .lsystem-svg {
  display: block;
  width: 150vw;
  height: 180vh;
  max-width: none;
}

/* Ensure content is above the plant */
.hylographic__header,
.hylographic__main {
  position: relative;
  z-index: 1;
}

/* Force index (landing page) */
.force-index {
  height: 100%;
  min-height: 60vh;
}

.force-index h2 {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.force-index ul {
  list-style: none;
}

.force-index li {
  margin-bottom: var(--space-sm);
}

.force-index a {
  color: var(--color-accent);
  text-decoration: none;
}

.force-index a:hover {
  text-decoration: underline;
}

/* Force index SVG */
.force-index__svg {
  display: block;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: #fafafa;
}

.force-index__node {
  cursor: pointer;
  transition: transform 0.1s ease;
}

.force-index__node:hover .force-index__circle {
  fill: #004499;
}

.force-index__circle {
  transition: fill 0.15s ease;
}

.force-index__label {
  pointer-events: none;
  user-select: none;
}

/* Viz components in articles */
.article__viz-segment {
  margin: var(--space-lg) 0;
  padding: var(--space-md);
  background: #fafafa;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  display: flex;
  justify-content: center;
}

.article__viz-error {
  margin: var(--space-lg) 0;
  padding: var(--space-md);
  background: #fff5f5;
  border: 1px solid #fcc;
  border-radius: 4px;
  color: #c00;
}

.viz-container {
  display: inline-block;
}

.viz-container svg {
  display: block;
}

/* MetaHATS component - code + visualization side by side */
.meta-hats {
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}

.meta-hats__header {
  padding: var(--space-md);
  background: #f5f5f5;
  border-bottom: 1px solid var(--color-border);
}

.meta-hats__header h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.meta-hats__header p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0;
}

.meta-hats__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.meta-hats__code {
  background: #1a1a1a;
  padding: var(--space-md);
  overflow-x: auto;
}

.meta-hats__code pre {
  margin: 0;
  background: transparent;
  padding: 0;
}

.meta-hats__code code {
  color: #e8d5a3;
  font-size: 0.75rem;
  line-height: 1.5;
}

.meta-hats__viz {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  background: #fafafa;
}

@media (max-width: 768px) {
  .meta-hats__content {
    grid-template-columns: 1fr;
  }
}

/* Article viewer */
.article {
  max-width: var(--max-width-content);
  margin: 0 auto;
}

.article__loading,
.article__error {
  padding: var(--space-xl);
  text-align: center;
  color: var(--color-text-secondary);
}

.article__error h2 {
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.article__content {
  line-height: 1.7;
}

.article__content pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  background-color: #f8f8f8;
  padding: var(--space-lg);
  border-radius: 4px;
  overflow-x: auto;
  white-space: pre-wrap;
}

/* 404 page */
.not-found {
  text-align: center;
  padding: var(--space-xl);
}

.not-found h2 {
  margin-bottom: var(--space-md);
}

.not-found a {
  color: var(--color-accent);
  text-decoration: none;
}

.not-found a:hover {
  text-decoration: underline;
}

/* Typography - article content (for future markdown rendering) */
.article__content h1 {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
  margin-top: var(--space-xl);
}

.article__content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  margin-top: var(--space-xl);
}

.article__content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  margin-top: var(--space-lg);
}

.article__content p {
  margin-bottom: var(--space-md);
}

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

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

.article__content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: #f0f0f0;
  padding: 0.1em 0.3em;
  border-radius: 3px;
}

.article__content pre code {
  background: none;
  padding: 0;
}

/* Lists */
.article__content ul,
.article__content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
}

.article__content li {
  margin-bottom: var(--space-xs);
}

/* Blockquotes */
.article__content blockquote {
  border-left: 3px solid var(--color-border);
  padding-left: var(--space-md);
  margin: var(--space-md) 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

/* Horizontal rules */
.article__content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-xl) 0;
}

/* Strong and emphasis */
.article__content strong {
  font-weight: 600;
}

/* First heading - no top margin */
.article__content > h1:first-child {
  margin-top: 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .hylographic__header {
    padding: var(--space-md) var(--space-lg);
  }

  .hylographic__main {
    padding: var(--space-lg);
  }
}