/* ==========================================================================
   Orbit Frontend — stylesheet
   Editorial reading template. Works across niches (config/site.js changes
   per domain, this file doesn't need to).
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --paper: #f7f5ef;
  --paper-raised: #fffefb;
  --ink: #1d1c19;
  --ink-soft: #4a473f;
  --ink-mute: #837c6c;
  --line: #e3dfd3;
  --line-strong: #d2ccba;
  --accent: #1e5c4a;
  --accent-ink: #0f3c2f;
  --accent-soft: #e1ebe6;
  --gold: #b8862e;
  --gold-soft: #f3e8d2;

  --font-display: "Fraunces", Georgia, "Iowan Old Style", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --content-w: 700px;
  --wide-w: 960px;

  --radius: 3px;
  --radius-lg: 6px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #161512;
    --paper-raised: #1e1c18;
    --ink: #eeece4;
    --ink-soft: #c7c2b3;
    --ink-mute: #8c8676;
    --line: #322f28;
    --line-strong: #423e34;
    --accent: #6fbfa2;
    --accent-ink: #a6dcc6;
    --accent-soft: #1e2c26;
    --gold: #d9ab55;
    --gold-soft: #2b2318;
  }
}

/* ---------- Reset & base ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  background: var(--line);
}

a {
  color: var(--accent-ink);
  text-decoration-color: var(--line-strong);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

a:hover {
  color: var(--accent);
  text-decoration-color: currentColor;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.2;
  font-weight: 600;
  margin: 0 0 0.5em;
}

p {
  margin: 0 0 1.1em;
}

ul, ol {
  padding-left: 1.3em;
}

main {
  display: block;
  width: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  a, .related-posts li img, .toc a {
    transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
  }
}

/* ---------- Site header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  padding: 14px clamp(20px, 5vw, 48px);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.site-logo img {
  border-radius: 8px;
  background: transparent;
}

.site-logo span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

/* ---------- Main / article shell ---------- */

main {
  padding: clamp(28px, 5vw, 56px) clamp(20px, 5vw, 48px) 80px;
}

main > h1 {
  /* index page heading */
  max-width: var(--wide-w);
  margin: 0 auto 28px;
  font-size: clamp(1.7rem, 3.4vw, 2.3rem);
}

article {
  max-width: var(--content-w);
  margin: 0 auto;
}

/* ---------- Breadcrumbs ---------- */

.breadcrumbs {
  max-width: var(--content-w);
  margin: 0 auto 22px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-mute);
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  color: var(--line-strong);
}

.breadcrumbs a {
  color: var(--ink-mute);
  text-decoration: none;
}

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

.breadcrumbs [aria-current="page"] {
  color: var(--ink-soft);
}

/* ---------- Article header ---------- */

.article-header {
  margin-bottom: 22px;
}

.article-header h1 {
  font-size: clamp(1.9rem, 4.2vw, 2.7rem);
  letter-spacing: -0.01em;
}

.byline {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-mute);
}

.byline .author-name {
  color: var(--ink-soft);
  font-weight: 500;
}

.byline time {
  color: var(--ink-mute);
}

/* ---------- Hero image ---------- */

.hero-image {
  width: 100%;
  aspect-ratio: auto;
  margin: 24px 0 32px;
  border-radius: var(--radius-lg);
}

/* ---------- Table of contents ---------- */

.toc {
  max-width: var(--content-w);
  margin: 0 auto 32px;
  padding: 18px 22px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.toc-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
  counter-reset: toc-counter;
}

.toc li {
  counter-increment: toc-counter;
  font-size: 0.92rem;
}

.toc li a {
  color: var(--ink-soft);
  text-decoration: none;
}

.toc li a::before {
  content: counter(toc-counter) ". ";
  color: var(--ink-mute);
  font-family: var(--font-mono);
  font-size: 0.82em;
}

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

.toc .toc-level-3 {
  padding-left: 1.2em;
  font-size: 0.85rem;
}

.toc .toc-level-4 {
  padding-left: 2.2em;
  font-size: 0.85rem;
}

/* ---------- Article content (backend-injected HTML) ---------- */

.article-content {
  font-size: 1.05rem;
  color: var(--ink-soft);
}

.article-content > *:first-child {
  margin-top: 0;
}

.article-content h2 {
  margin-top: 2em;
  font-size: 1.5rem;
  padding-top: 0.6em;
  border-top: 1px solid var(--line);
}

.article-content h3 {
  margin-top: 1.6em;
  font-size: 1.2rem;
}

.article-content h2:first-child,
.article-content h3:first-child {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.article-content p {
  margin: 0 0 1.3em;
}

.article-content ul,
.article-content ol {
  margin: 0 0 1.3em;
  padding-left: 1.4em;
}

.article-content li + li {
  margin-top: 0.4em;
}

.article-content a {
  font-weight: 500;
}

.article-content strong {
  color: var(--ink);
  font-weight: 600;
}

.article-content blockquote {
  margin: 1.6em 0;
  padding: 0.2em 1.4em;
  border-left: 3px solid var(--accent);
  color: var(--ink-soft);
  font-style: italic;
}

.article-content img {
  margin: 1.8em 0;
  border-radius: var(--radius);
}

.article-content figcaption {
  margin-top: 0.5em;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-mute);
  text-align: center;
}

.article-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--accent-soft);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

.article-content pre {
  padding: 16px 18px;
  overflow-x: auto;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius-lg);
}

.article-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 0.92rem;
}

.article-content th,
.article-content td {
  border: 1px solid var(--line);
  padding: 8px 12px;
  text-align: left;
}

.article-content th {
  background: var(--paper-raised);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
}

.article-content hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 2.4em 0;
}

/* ---------- Author bio ---------- */

.author-bio {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-top: 44px;
  padding: 20px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.author-bio img {
  flex: none;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
}

.author-bio .author-name {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
}

.author-bio .author-bio-text {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink-mute);
}

.author-links {
  list-style: none;
  display: flex;
  gap: 10px;
  margin: 10px 0 0;
  padding: 0;
}

.author-links a {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent-ink);
  text-decoration: none;
  border: 1px solid var(--line-strong);
  padding: 4px 10px;
  border-radius: 20px;
}

.author-links a:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
}

/* ---------- Related posts & tags ---------- */

.related-posts {
  max-width: var(--content-w);
  margin: 48px auto 0;
}

.related-posts h2 {
  font-size: 1.15rem;
  margin-bottom: 16px;
}

.related-posts ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.related-posts li a {
  display: block;
  text-decoration: none;
  color: var(--ink);
}

.related-posts li img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  margin-bottom: 8px;
}

.related-posts li span {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.4;
}

.related-posts li a:hover span {
  color: var(--accent);
}

.related-terms {
  max-width: var(--content-w);
  margin: 20px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--gold);
  background: var(--gold-soft);
  padding: 5px 10px;
  border-radius: 20px;
}

/* ---------- Index page: post list ---------- */

.post-list {
  max-width: var(--wide-w);
  margin: 0 auto;
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 28px 22px;
}

.post-list li a {
  display: block;
  text-decoration: none;
  color: var(--ink);
}

.post-list li img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  margin-bottom: 10px;
}

.post-list li span {
  display: block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.05rem;
  line-height: 1.35;
}

.post-list li a:hover span {
  color: var(--accent);
}

/* ---------- Static pages (about / dmca / disclaimer / contact) ---------- */

main > article > h1 {
  max-width: var(--content-w);
  margin: 0 auto 0.6em;
  font-size: clamp(1.7rem, 3.6vw, 2.3rem);
}

main > article:has(> h1):not(:has(.article-header)) {
  max-width: var(--content-w);
}

main > article p {
  color: var(--ink-soft);
}

/* ---------- Site footer ---------- */

.site-footer {
  padding: 32px clamp(20px, 5vw, 48px) 44px;
  border-top: 1px solid var(--line);
  text-align: center;
}

.site-footer nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 14px;
}

.site-footer nav a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-mute);
  text-decoration: none;
}

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

.site-footer p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--ink-mute);
}

/* ---------- Responsive ---------- */

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .author-bio {
    flex-direction: column;
    align-items: flex-start;
  }

  .related-posts ul {
    grid-template-columns: 1fr;
  }

  .post-list {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
}