/* ================================================================
   willslone.com — neo-brutalist design system
   ================================================================ */

:root {
  --bg:           #F5F0E8;
  --surface:      #FFFFFF;
  --text:         #0A0A0A;
  --text-muted:   #444444;
  --ink:          #0A0A0A;
  --purple:       #7A2A8E;
  --purple-text:  #5A1A6A;
  --on-purple:    #F5F0E8;
  --purple-light: #F5EDFF;
  --border:       3px solid var(--ink);
  --shadow:       4px 4px 0 var(--ink);
  --font-body:    'Atkinson Hyperlegible Next', 'Atkinson Hyperlegible', system-ui, sans-serif;
  --font-mono:    'Atkinson Hyperlegible Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --measure:      68ch;
  --container:    1120px;
}

[data-theme="dark"],
[data-theme="system"]:where([data-os="dark"]) {
  --bg:           #1A1A1A;
  --surface:      #1A1A1A;
  --text:         #F5F0E8;
  --text-muted:   #AAAAAA;
  --ink:          #F5F0E8;
  --purple:       #D8B4FE;
  --purple-text:  #D8B4FE;
  --on-purple:    #1A1A1A;
  --purple-light: #3A1E40;
}

/* ================================================================
   RESET / BASE
   ================================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s, color 0.2s;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img, svg { display: block; max-width: 100%; }

a {
  color: var(--text);
  text-underline-offset: 3px;
  text-decoration-thickness: 3px;
}
a:hover { background: var(--purple-light); text-decoration: none; color: var(--text); }

::selection { background: var(--purple); color: var(--on-purple); }

main { flex: 1; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ================================================================
   FOCUS / SKIP LINK
   ================================================================ */
:focus-visible {
  outline: 3px solid var(--purple);
  outline-offset: 3px;
}
:focus:not(:focus-visible) { outline: none; }

/* Inset focus for bordered/shadowed elements so outline doesn't interact with the shadow */
.primary-nav a:focus-visible,
.contact-card:focus-visible,
.prev-next a:focus-visible,
.featured-post:focus-visible {
  outline: 3px solid var(--purple);
  outline-offset: -10px;
}

/* On filled purple backgrounds, flip outline to on-purple for contrast */
.primary-nav a[aria-current="page"]:focus-visible {
  outline-color: var(--on-purple);
}

h1[tabindex="-1"]:focus-visible,
h2[tabindex="-1"]:focus-visible {
  outline: 3px solid var(--purple);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1.5rem;
  background: var(--purple);
  color: var(--on-purple);
  padding: 0.6rem 1rem;
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  border: var(--border);
  z-index: 1000;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 0; }

/* ================================================================
   HEADER
   ================================================================ */
.site-header {
  background: var(--bg);
  border-bottom: var(--border);
}
.site-header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 2rem;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.wordmark {
  display: inline-flex;
  align-items: flex-start;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text);
}
.wordmark:hover { background: none; color: var(--text); }
.wordmark .dot {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  background: var(--purple);
  flex-shrink: 0;
  margin-top: 0.5rem;
}
.wordmark-stack { display: flex; flex-direction: column; gap: 0.1rem; }
.wordmark-name { font-size: 1.25rem; font-weight: 700; color: var(--text); line-height: 1.2; }
.wordmark-title { font-size: 0.875rem; font-weight: 400; color: var(--text); line-height: 1.2; }

.primary-nav ul {
  list-style: none;
  display: flex;
  gap: 0.75rem;
  align-items: center;
}
.primary-nav a {
  display: block;
  padding: 0.4rem 1rem;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  border: var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.1s, box-shadow 0.1s;
}
.primary-nav a:hover {
  background: var(--purple-light);
  color: var(--text);
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--ink);
}
.primary-nav a[aria-current="page"] {
  background: var(--purple);
  color: var(--on-purple);
}
.primary-nav a[aria-current="page"]:hover {
  background: var(--purple);
  color: var(--on-purple);
}

/* ================================================================
   INDEX PAGE
   ================================================================ */
.index-heading {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0;
}

.section-heading-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 2.5rem 0 1rem;
  margin-bottom: 2rem;
  border-bottom: var(--border);
}

.no-posts {
  padding: 4rem 0;
  color: var(--text-muted);
}

/* Featured post */
.featured-post {
  border: var(--border);
  box-shadow: var(--shadow);
  padding: 2rem;
  margin-bottom: 2rem;
  background: var(--surface);
  position: relative;
  overflow: hidden;
}
.featured-label {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: var(--purple);
  color: var(--on-purple);
  padding: 0.25rem 0.6rem;
  margin-bottom: 1rem;
}
.featured-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}
.featured-title a {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--purple);
  text-decoration-thickness: 3px;
  text-underline-offset: 4px;
}
.featured-title a:hover { background: var(--purple-light); }
.featured-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 1rem;
}
.featured-excerpt {
  font-size: 1rem;
  line-height: 1.65;
  max-width: 60ch;
  border-left: 4px solid var(--purple);
  padding-left: 1rem;
}

/* Post list */
.post-list { list-style: none; margin-bottom: 3rem; display: flex; flex-direction: column; gap: 1rem; }
.post-list-item {
  border: var(--border);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  background: var(--surface);
}
.post-list-title {
  font-size: clamp(1.1rem, 2.5vw, 1.375rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.post-list-title a {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--purple);
  text-decoration-thickness: 3px;
  text-underline-offset: 4px;
}
.post-list-title a:hover { background: var(--purple-light); }
.post-list-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.post-list-excerpt {
  font-size: 0.9375rem;
  color: var(--text-muted);
  max-width: 64ch;
  line-height: 1.6;
}

/* ================================================================
   ARTICLE (post page)
   ================================================================ */
.article { padding: 3rem 0 3rem; }

.article-header {
  max-width: var(--measure);
  margin: 0 auto 2.5rem;
  padding: 0 2rem;
}
.article-meta {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-top: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.article-title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.05;
  color: var(--text);
  text-wrap: balance;
}
.article-deck {
  margin-top: 1.25rem;
  font-size: clamp(1.125rem, 1.8vw, 1.3125rem);
  color: var(--text-muted);
  line-height: 1.55;
  max-width: 56ch;
  border-left: 4px solid var(--purple);
  padding-left: 1rem;
}
.eyebrow a {
  text-decoration: none;
  color: var(--purple);
}
.eyebrow a:hover { background: var(--purple-light); }

/* Article body */
.article-body {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 2rem;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--text-muted);
}
.article-body > * + * { margin-top: 1.25rem; }
.article-body h2 {
  font-size: 1.625rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--text);
  margin-top: 2.75rem;
  line-height: 1.2;
  border-left: 4px solid var(--purple);
  padding-left: 0.75rem;
}
.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin-top: 2rem;
  line-height: 1.3;
}
.article-body p { color: var(--text-muted); }
.article-body strong { color: var(--text); font-weight: 700; }
.article-body ul, .article-body ol {
  padding-left: 1.5rem;
  color: var(--text-muted);
}
.article-body li + li { margin-top: 0.5rem; }
.article-body a { color: var(--purple); text-decoration-thickness: 2px; }
.article-body a:hover { background: var(--purple-light); text-decoration: underline; text-decoration-thickness: 2px; }
.article-body blockquote {
  margin: 1.75rem 0;
  padding: 0.75rem 1rem;
  border-left: 4px solid var(--purple);
  background: var(--surface);
  border-top: var(--border);
  border-right: var(--border);
  border-bottom: var(--border);
  font-size: 1.0625rem;
  color: var(--text);
}
.article-body code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.15em 0.4em;
  background: var(--surface);
  border: 2px solid var(--ink);
  color: var(--text);
}
.article-body pre {
  background: var(--surface);
  border: var(--border);
  box-shadow: var(--shadow);
  padding: 1rem 1.25rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.55;
}
.article-body pre code { padding: 0; background: transparent; border: none; }
.article-body .callout {
  margin: 1.75rem 0;
  padding: 1.25rem 1.5rem;
  background: var(--purple-light);
  border-left: 4px solid var(--purple);
  border-top: var(--border);
  border-right: var(--border);
  border-bottom: var(--border);
}
.article-body .callout strong:first-child {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--purple-text);
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
}
.article-body .callout p { color: var(--text); }

/* TOC */
.article-toc {
  max-width: var(--measure);
  margin: 0 auto 2.5rem;
  padding: 0 2rem;
}
.article-toc-inner {
  border: var(--border);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.5rem;
  background: var(--surface);
}
.article-toc-label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 0.75rem;
}
.article-toc ol { list-style: none; }
.article-toc li { margin-top: 0.4rem; }
.article-toc li:first-child { margin-top: 0; }
.article-toc a {
  font-size: 0.9375rem;
  color: var(--purple);
  text-decoration: none;
}
.article-toc a:hover { background: var(--purple-light); text-decoration: none; }

/* Article footer */
.article-footer {
  max-width: var(--measure);
  margin: 4rem auto 0;
  padding: 0 2rem;
}
.author-card {
  border: var(--border);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  background: var(--surface);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  align-items: start;
}
.author-avatar {
  width: 72px;
  height: 72px;
  flex-shrink: 0;
  object-fit: cover;
  border: var(--border);
  display: block;
}
.author-name {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--purple-text);
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
}
.author-bio {
  font-size: 0.9375rem;
  color: var(--text);
  line-height: 1.55;
}

/* Prev/next */
.prev-next {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: var(--border);
}
.prev-next a {
  display: block;
  padding: 1rem 1.25rem;
  border: var(--border);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--text);
  background: var(--surface);
  transition: transform 0.1s, box-shadow 0.1s;
}
.prev-next a:hover {
  background: var(--purple-light);
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--ink);
}
.pn-label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 0.4rem;
}
.pn-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
}
.pn-next { text-align: right; }
.pn-empty { visibility: hidden; }

/* ================================================================
   PAGE HEADER (contact)
   ================================================================ */
.page-header { padding: 4rem 0 2.5rem; }
.page-header-grid {
  display: grid;
  grid-template-columns: 4px 1fr;
  gap: 0 2.5rem;
}
.page-header-bar {
  background: var(--purple);
  align-self: stretch;
}
.page-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--text);
}
.page-lead {
  margin-top: 1.5rem;
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  color: var(--text-muted);
  max-width: 56ch;
  line-height: 1.55;
}

/* ================================================================
   PROSE (accessibility, sitemap)
   ================================================================ */
.prose {
  max-width: var(--measure);
  padding: 2rem 0 3rem;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--text-muted);
}
.prose > * + * { margin-top: 1.25rem; }
.prose h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-top: 2.5rem;
  letter-spacing: -0.015em;
}
.prose h2:first-child { margin-top: 0; }
.prose h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}
.prose ul { list-style: none; padding: 0; }
.prose ul li { padding: 0.35rem 0; border-bottom: 1px solid var(--border-soft); }
.prose ul ul { padding-left: 1.5rem; }
.prose a { color: var(--purple); text-decoration-thickness: 2px; }
.prose a:hover { background: var(--purple-light); text-decoration: underline; text-decoration-thickness: 2px; }

/* ================================================================
   CONTACT
   ================================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: 1rem;
  margin-top: 2rem;
  padding-bottom: 3rem;
}
.contact-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem 1.75rem;
  background: var(--surface);
  border: var(--border);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--text);
  transition: transform 0.1s, box-shadow 0.1s;
}
.contact-card:hover {
  background: var(--purple-light);
  color: var(--text);
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--ink);
}
.contact-card .label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--purple-text);
  font-family: var(--font-mono);
}
.contact-card .value {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}
.contact-card .desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
}

/* ================================================================
   FOOTER
   ================================================================ */
.site-footer {
  border-top: var(--border);
  background: var(--bg);
  padding: 1.5rem 2rem;
}
.site-footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.875rem;
}
.site-footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.site-footer-meta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  padding: 0;
  margin: 0;
}
.footer-links li {
  display: flex;
  align-items: center;
}
.footer-links li + li::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  background: currentColor;
  flex-shrink: 0;
  margin: 0 0.5rem;
}
.footer-copyright {
  color: var(--text-muted);
  font-size: 0.875rem;
}
.dot-sep {
  display: inline-block;
  width: 4px;
  height: 4px;
  background: currentColor;
  vertical-align: middle;
  flex-shrink: 0;
}
.site-footer-inner a { color: var(--purple); text-decoration-line: underline; text-decoration-thickness: 2px; }
.site-footer-inner a:hover { background: var(--purple-light); }
.rss-link { display: inline-flex; align-items: center; gap: 0.4rem; }

/* Theme switcher */
.theme-switcher {
  border: none;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.theme-switcher legend {
  font-size: 0.8125rem;
  color: var(--text-muted);
  padding: 0;
  float: none;
  display: contents;
}
.theme-switcher .options {
  display: flex;
  gap: 4px;
  background: transparent;
}
.theme-switcher input[type="radio"] {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.theme-switcher label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.3rem 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: var(--border);
  transition: background 0.1s;
  user-select: none;
}
.theme-switcher label:hover { background: var(--purple-light); color: var(--text); }
.theme-switcher input[type="radio"]:checked + label:hover { background: var(--purple); color: var(--on-purple); }
.theme-switcher input[type="radio"]:checked + label {
  background: var(--purple);
  color: var(--on-purple);
  font-weight: 700;
}
.theme-switcher input[type="radio"]:focus-visible + label {
  outline: 3px solid var(--purple);
  outline-offset: -9px;
}
.theme-switcher input[type="radio"]:checked:focus-visible + label {
  outline-color: var(--on-purple);
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 720px) {
  .container { padding: 0 1.25rem; }
  .site-header-inner { padding: 0 1.25rem; gap: 1rem; }
  .primary-nav ul { gap: 0.5rem; }
  .primary-nav a { padding: 0.35rem 0.6rem; font-size: 0.6875rem; }
  .page-header { padding: 2.5rem 0 1.5rem; }
  .page-header-grid { gap: 0 1.25rem; }
  .featured-post { padding: 1.5rem; }
  .article-header, .article-body, .article-footer, .article-toc { padding: 0 1.25rem; }
  .site-footer { padding: 1.25rem; }
  .site-footer-inner { flex-direction: column; align-items: flex-start; }
  .site-footer-top { flex-direction: column; align-items: flex-start; }
  .prev-next { grid-template-columns: 1fr; }
  .pn-next { text-align: left; }
  .author-card { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .site-header-inner {
    height: auto;
    flex-wrap: wrap;
    padding: 0.75rem 1.25rem;
    gap: 0.5rem;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}