:root {
  /* Color System - OKLCH, warm neutrals tinted toward ochre */
  --color-bg: oklch(97% 0.008 70);
  --color-bg-elevated: oklch(100% 0.005 70);
  --color-text: oklch(18% 0.01 70);
  --color-text-secondary: oklch(42% 0.015 70);
  --color-text-tertiary: oklch(58% 0.01 70);
  --color-accent: oklch(55% 0.16 70);
  --color-accent-hover: oklch(48% 0.18 70);
  --color-accent-subtle: oklch(94% 0.04 70);
  --color-border: oklch(85% 0.015 70);
  --color-border-subtle: oklch(93% 0.008 70);

  /* Typography */
  --font-display: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-body: Sora, -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;

  /* Type Scale - Perfect Fourth (1.333) */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1.125rem;
  --text-lg: 1.333rem;
  --text-xl: 1.777rem;
  --text-2xl: 2.369rem;
  --text-3xl: clamp(2.369rem, 5vw + 1rem, 3.157rem);

  /* Spacing - 4pt base */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --container-max: 72rem;
  --container-narrow: 65ch;
  --radius-sm: 2px;
  --radius-md: 4px;

  /* Motion */
  --ease-out: cubic-bezier(0.25, 1, 0.5, 1);
  --duration-fast: 150ms;
  --duration-base: 250ms;
}

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

html {
  font-size: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

/* Page wrapper */
.page-wrapper {
  position: relative;
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  text-wrap: balance;
  color: var(--color-text);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }

p {
  text-wrap: pretty;
  max-width: var(--container-narrow);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Reading Progress Indicator */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--color-accent);
  z-index: 1000;
  transition: width 0.1s linear;
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-block: var(--space-32);
}

.section + .section {
  border-top: 1px solid var(--color-border-subtle);
}

/* Masthead */
.masthead {
  padding-block: var(--space-12) var(--space-8);
}

.masthead--compact {
  padding-block: var(--space-6);
}

.logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.logo:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.tagline {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 300;
  color: var(--color-text-secondary);
  margin-top: var(--space-4);
  line-height: 1.4;
  max-width: 45ch;
}

/* Section Titles */
.section-title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.section-title {
  font-size: var(--text-sm);
  font-family: var(--font-body);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-12);
}

.section-title-row .section-title {
  margin-bottom: 0;
}

.section-title-link {
  font-size: var(--text-sm);
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
}

.section-title-link:hover {
  color: var(--color-accent);
  text-decoration: none;
}

/* Article Teasers */
.article-teaser {
  padding-block: var(--space-8);
  border-bottom: 1px solid var(--color-border-subtle);
}

.article-teaser:first-of-type {
  padding-top: 0;
}

.article-teaser:last-child {
  border-bottom: none;
}

.article-meta {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
  display: flex;
  gap: var(--space-4);
  align-items: center;
}

.reading-time {
  font-weight: 300;
}

.article-teaser .article-title {
  font-size: var(--text-2xl);
  font-weight: 600;
  margin-bottom: var(--space-3);
  line-height: 1.15;
  max-width: 60ch;
}

.article-teaser .article-title a {
  color: var(--color-text);
  text-decoration: none;
}

.article-teaser .article-title a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.article-excerpt {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 60ch;
  margin-bottom: var(--space-4);
}

/* Tags */
.article-tags,
.article-header__tags,
.article__tags,
.work-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.article-tag,
.article-header__tag,
.article__tag,
.work-tag {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

/* Work Section */
.work-list {
  display: grid;
  gap: var(--space-12);
}

.work-item {
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border-subtle);
}

.work-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

/* Work Hierarchy */

.work-primary {
  background-color: oklch(96% 0.02 70);
  margin-inline: calc(-1 * var(--space-6));
  padding: var(--space-24) var(--space-6);
  margin-bottom: var(--space-16);
}

.work-item--primary .work-name {
  font-size: clamp(2.369rem, 5vw + 1rem, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.work-item--primary .work-description {
  max-width: 65ch;
  font-size: var(--text-lg);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.work-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-bg-elevated);
  background-color: var(--color-accent);
  padding: var(--space-3) var(--space-5);
  border-radius: 999px;
  text-decoration: none;
  margin-bottom: var(--space-6);
  transition: background-color var(--duration-fast) var(--ease-out), transform var(--duration-base) var(--ease-out);
  will-change: transform;
}

.work-cta:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 999px;
  text-decoration: none;
}

.work-cta:active {
  transform: scale(0.97);
}

.work-cta::after {
  content: '\2192';
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 1.1em;
  line-height: 1;
}

.work-cta:hover {
  background-color: var(--color-accent-hover);
  color: var(--color-bg-elevated);
  text-decoration: none;
}

.work-secondary {
  padding-block: var(--space-16);
  border-top: 1px solid var(--color-border-subtle);
  margin-bottom: var(--space-16);
}

.work-item--secondary .work-name {
  font-size: var(--text-xl);
}

.work-tertiary {
  border-top: 1px solid var(--color-border-subtle);
  padding-top: var(--space-12);
}

.work-list--tertiary {
  gap: var(--space-8);
}

.work-list--tertiary .work-item {
  border-bottom: none;
  padding-bottom: 0;
}

.work-list--tertiary .work-name {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.work-list--tertiary .work-role {
  font-size: var(--text-xs);
  margin-bottom: var(--space-2);
}

.work-list--tertiary .work-description {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  max-width: 50ch;
  margin-bottom: var(--space-3);
}

.work-name {
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

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

.work-name a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.work-role {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-3);
}

.work-description {
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 55ch;
  margin-bottom: var(--space-4);
}

/* About Section */
.about-content {
  max-width: var(--container-narrow);
}

.about-photo {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: var(--space-6);
  filter: grayscale(30%) contrast(1.05);
}

.about-content p {
  margin-bottom: var(--space-6);
  color: var(--color-text-secondary);
}

.about-content p:last-of-type {
  margin-bottom: var(--space-8);
}

.about-contact {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
}

.contact-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
}

.contact-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: var(--color-border);
  transition: background-color var(--duration-fast) var(--ease-out);
}

.contact-link:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.contact-link:hover::after {
  background-color: var(--color-accent);
}

/* Footer */
.site-footer {
  padding-block: var(--space-8);
  border-top: 1px solid var(--color-border-subtle);
  margin-top: var(--space-16);
}

.site-footer p {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  max-width: none;
}

/* Article Page */
.article-page {
  padding-block: var(--space-8) var(--space-24);
}

.article-header {
  margin-bottom: var(--space-16);
  padding-bottom: var(--space-8);
}

.article-header .article-meta {
  margin-bottom: var(--space-6);
  font-size: var(--text-sm);
}

.article-headline {
  font-size: clamp(2.369rem, 6vw + 1rem, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
}

.article-lead {
  font-size: var(--text-lg);
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: 1.5;
  max-width: 55ch;
}

/* Article Hero Image */
.article-hero {
  margin-top: var(--space-8);
  margin-bottom: var(--space-12);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: zoom-in;
}

.article-hero img {
  display: block;
  width: 100%;
  max-height: 600px;
  height: auto;
  transition: transform var(--duration-base) var(--ease-out);
}

.article-hero:hover img {
  transform: scale(1.02);
}

/* Lightbox */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-base) var(--ease-out), visibility var(--duration-base) var(--ease-out);
  cursor: zoom-out;
}

.lightbox.is-active {
  opacity: 1;
  visibility: visible;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

/* Article Body */
.article-body {
  font-family: var(--font-display);
  font-size: var(--text-base);
  line-height: 1.75;
}

.article-body p {
  margin-bottom: var(--space-6);
  max-width: var(--container-narrow);
}

.article-body .lead {
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.article-body h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  margin-top: var(--space-16);
  margin-bottom: var(--space-6);
  line-height: 1.2;
}

.article-body h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  line-height: 1.3;
}

.article-body strong {
  color: var(--color-text);
  font-weight: 600;
}

.article-body em {
  font-style: italic;
}

.article-body ul,
.article-body ol {
  margin-bottom: var(--space-6);
  padding-left: var(--space-6);
}

.article-body li {
  margin-bottom: var(--space-2);
  max-width: var(--container-narrow);
}

.article-body blockquote {
  padding: var(--space-6) 0;
  margin: var(--space-8) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-style: italic;
}

.article-body blockquote > p:last-child {
  margin-bottom: 0;
}

.article-body code {
  font-family: "SF Mono", "Fira Code", "Cascadia Code", ui-monospace, monospace;
  font-size: 0.85em;
  background: var(--color-accent-subtle);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--color-text);
}

.article-body pre {
  font-family: "SF Mono", "Fira Code", "Cascadia Code", ui-monospace, monospace;
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-6);
  overflow-x: auto;
  margin: var(--space-8) 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  tab-size: 2;
}

.article-body pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* ============================================
   BREAKOUT LAYOUT: Code blocks get more space
   ============================================ */

/* Widen the article body container */
.article-body .container--narrow {
  display: grid;
  grid-template-columns:
    [full-start] minmax(var(--space-6), 1fr)
    [content-start] min(65ch, 100%)
    [content-end] minmax(var(--space-6), 1fr)
    [full-end];
  padding-inline: 0;
  max-width: var(--container-max);
}

/* Default: all children sit in the content column */
.article-body .container--narrow > * {
  grid-column: content;
}

/* Breakout elements: span all columns for full width */
.article-body .container--narrow > .codehilite,
.article-body .container--narrow > pre,
.article-body .container--narrow > div.mermaid {
  grid-column: full;
  margin: 0;
  border-radius: 0;
}

/* Re-apply vertical margins for breakout elements */
.article-body .container--narrow > .codehilite,
.article-body .container--narrow > pre {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.article-body .container--narrow > div.mermaid {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

/* On mobile, keep some rounding for comfort */
@media (max-width: 640px) {
  .article-body .container--narrow > .codehilite,
  .article-body .container--narrow > pre,
  .article-body .container--narrow > div.mermaid {
    border-radius: var(--radius-md);
  }
}

/* Copy button for code blocks */
.code-copy-btn {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: rgba(243, 239, 230, 0.08);
  border: 1px solid rgba(243, 239, 230, 0.12);
  border-radius: var(--radius-sm);
  color: rgba(243, 239, 230, 0.5);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s ease, background 0.2s ease;
}

.codehilite:hover .code-copy-btn,
.codehilite:focus-within .code-copy-btn {
  opacity: 1;
}

.code-copy-btn:hover {
  background: rgba(243, 239, 230, 0.15);
  color: rgba(243, 239, 230, 0.8);
}

.code-copy-btn:active {
  transform: scale(0.95);
}

.article-body hr {
  display: none;
}

.article-body a {
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 0.15em;
  text-decoration-color: var(--color-border);
  transition: text-decoration-color var(--duration-fast) var(--ease-out);
}

.article-body a:hover {
  text-decoration-color: var(--color-accent);
}

/* Footnotes */
.article-body .footnote-ref {
  font-size: 0.75em;
  vertical-align: super;
  line-height: 0;
  text-decoration: none;
}

.article-body .footnote {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  line-height: 1.6;
  border-top: 1px solid var(--color-border-subtle);
  margin-top: var(--space-16);
  padding-top: var(--space-6);
}

.article-body .footnote ol {
  padding-left: var(--space-4);
}

.article-body .footnote li {
  margin-bottom: var(--space-3);
}

.article-body .footnote p {
  margin-bottom: var(--space-1);
  max-width: 60ch;
}

.article-body .footnote > hr {
  display: none;
}

/* Article Tags */
.article-body .article-tags {
  margin-top: var(--space-6);
}

/* Mermaid Diagrams */
.article-body pre.mermaid {
  background: var(--color-accent-subtle);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-subtle);
}

.article-body div.mermaid {
  margin: var(--space-8) 0;
  padding: var(--space-4) var(--space-6);
  background: var(--color-accent-subtle);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

.article-body .mermaid svg {
  width: 100%;
  height: auto;
  display: block;
}

/* Article Footer */
.article-footer {
  margin-top: var(--space-24);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-subtle);
}

.back-link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.back-link:hover {
  color: var(--color-accent);
}

/* Scroll Reveal */
.js-enabled .reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.js-enabled .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .js-enabled .reveal {
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Responsive */
@media (max-width: 640px) {
  :root {
    --text-base: 1rem;
    --space-32: 5rem;
    --space-24: 4rem;
  }

  .masthead {
    padding-block: var(--space-8) var(--space-6);
  }

  .tagline {
    font-size: var(--text-base);
  }

  .section {
    padding-block: var(--space-16);
  }

  .article-teaser .article-title {
    font-size: var(--text-xl);
  }

  .about-contact {
    flex-direction: column;
    gap: var(--space-3);
  }

  .article-headline {
    font-size: var(--text-2xl);
  }

  .about-photo {
    width: 100px;
    height: 100px;
  }
}

@media (min-width: 1024px) {
  .container {
    padding-inline: var(--space-8);
  }

  .work-primary {
    margin-inline: calc(-1 * var(--space-8));
    padding-inline: var(--space-8);
  }

}

/* Print */
@media print {
  .masthead--compact,
  .site-footer,
  .about-contact,
  .reading-progress {
    display: none;
  }

  body {
    font-size: 11pt;
    line-height: 1.5;
    color: #000;
    background: #fff;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  .article-body {
    font-family: Georgia, "Times New Roman", serif;
  }
}