/* md3-glass — MD3 roles + Linear dark canvas + Material light surfaces */
:root {
  /* shared structure */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  --font: Inter, "SF Pro Display", -apple-system, system-ui, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --max: 760px;
  --shell: 1120px;

  /* dark defaults (Linear-inspired) — also used before data-theme resolves */
  --primary: #5e6ad2;
  --primary-hover: #828fff;
  --primary-focus: #5e69d1;
  --on-primary: #ffffff;
  --primary-container: rgba(94,106,210,.22);
  --on-primary-container: #c5caff;

  --ink: #f7f8f8;
  --on-surface: #f7f8f8;
  --ink-muted: #d0d6e0;
  --ink-subtle: #8a8f98;
  --ink-tertiary: #62666d;

  --canvas: #010102;
  --surface: #0f1011;
  --surface-1: #0f1011;
  --surface-2: #141516;
  --surface-3: #18191a;
  --surface-container: #141516;
  --outline: #34343a;
  --outline-variant: #23252a;
  --hairline: #23252a;
  --hairline-strong: #34343a;
  --success: #27a644;

  --glass-bg: linear-gradient(155deg, rgba(94,106,210,.14), rgba(15,16,17,.62) 42%, rgba(94,106,210,.08));
  --glass-stroke: rgba(247,248,248,.12);
  --elev: 0 18px 40px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.12);
  --elev-1: 0 1px 2px rgba(0,0,0,.28);
  --elev-2: 0 8px 24px rgba(0,0,0,.32);

  --hover-fill: rgba(247,248,248,.06);
  --hover-fill-strong: rgba(247,248,248,.1);
  --field-bg: rgba(247,248,248,.06);
  --noise-opacity: .22;
  --focus-ring: rgba(94,105,209,.35);
  --tonal-bg: rgba(94,106,210,.18);
  --tonal-border: rgba(94,106,210,.28);
  --blockquote-bg: rgba(94,106,210,.08);
  --code-inline-bg: rgba(247,248,248,.08);
}

html[data-theme="dark"] {
  color-scheme: dark;
}

html[data-theme="light"] {
  color-scheme: light;
  --primary: #4f5bc4;
  --primary-hover: #5e6ad2;
  --primary-focus: #3f4ab0;
  --on-primary: #ffffff;
  --primary-container: #e8eafc;
  --on-primary-container: #1a1f5c;

  --ink: #1a1b1e;
  --on-surface: #1a1b1e;
  --ink-muted: #3c4048;
  --ink-subtle: #6b7280;
  --ink-tertiary: #9aa0a6;

  --canvas: #f7f8fa;
  --surface: #ffffff;
  --surface-1: #ffffff;
  --surface-2: #f0f1f4;
  --surface-3: #e8e9ee;
  --surface-container: #f0f1f4;
  --outline: #c8cad0;
  --outline-variant: #e2e4e8;
  --hairline: #e2e4e8;
  --hairline-strong: #c8cad0;
  --success: #1b7f37;

  --glass-bg: linear-gradient(155deg, rgba(255,255,255,.82), rgba(247,248,250,.92) 48%, rgba(94,106,210,.06));
  --glass-stroke: rgba(26,27,30,.08);
  --elev: 0 10px 28px rgba(26,27,30,.08), inset 0 1px 0 rgba(255,255,255,.95);
  --elev-1: 0 1px 2px rgba(26,27,30,.06);
  --elev-2: 0 8px 24px rgba(26,27,30,.1);

  --hover-fill: rgba(26,27,30,.05);
  --hover-fill-strong: rgba(26,27,30,.08);
  --field-bg: rgba(26,27,30,.04);
  --noise-opacity: .06;
  --focus-ring: rgba(79,91,196,.28);
  --tonal-bg: rgba(79,91,196,.1);
  --tonal-border: rgba(79,91,196,.22);
  --blockquote-bg: rgba(79,91,196,.08);
  --code-inline-bg: rgba(26,27,30,.06);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .anim-in { opacity: 1 !important; transform: none !important; }
}

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.05px;
  -webkit-font-smoothing: antialiased;
}
body { overflow-x: hidden; }
a { color: var(--primary-hover); text-decoration: none; }
a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
img, video { max-width: 100%; height: auto; }
:focus-visible {
  outline: 2px solid var(--primary-focus);
  outline-offset: 2px;
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: var(--space-md); top: -100px; z-index: 100;
  background: var(--primary); color: var(--on-primary);
  padding: 8px 14px; border-radius: var(--radius-md); font-weight: 500;
}
.skip-link:focus { top: var(--space-md); }

#md3-bg {
  position: fixed; inset: 0; z-index: 0; width: 100%; height: 100%;
  pointer-events: none; display: block;
}
html[data-theme="light"] #md3-bg { display: none !important; }

.noise {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  opacity: var(--noise-opacity);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

.shell {
  position: relative; z-index: 2;
  max-width: var(--shell);
  margin: 0 auto;
  padding: var(--space-md) var(--space-sm) var(--space-2xl);
}

.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--elev);
  border-radius: var(--radius-xl);
}

.topbar {
  display: flex; align-items: center; gap: 6px;
  min-height: 56px; padding: 8px 10px;
  margin-bottom: var(--space-md);
  position: sticky; top: 12px; z-index: 10;
}
.brand {
  display: flex; align-items: center; gap: 0;
  margin: 0 6px; color: inherit; text-decoration: none; min-width: 0;
}
.brand:hover { text-decoration: none; color: inherit; }
.brand-text { min-width: 0; }
.brand b {
  display: block; font-size: 15px; font-weight: 600;
  letter-spacing: -0.3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  line-height: 1.2;
}

.nav-desktop { display: none; gap: 2px; margin-left: 4px; flex: 1; }
.nav-link {
  display: inline-flex; align-items: center;
  color: var(--ink-subtle); font-size: 13px; font-weight: 500;
  padding: 8px 12px; border-radius: var(--radius-full);
  text-decoration: none; border: 0; background: transparent; cursor: pointer;
}
.nav-link:hover { background: var(--hover-fill); color: var(--ink); text-decoration: none; }
.nav-link.active { color: var(--ink); background: var(--surface-2); }

.search-form { margin-left: auto; display: none; }
.search-form input {
  width: 180px; max-width: 28vw;
  background: var(--field-bg);
  border: 1px solid var(--hairline);
  color: var(--ink); border-radius: var(--radius-md);
  padding: 8px 12px; font: inherit; font-size: 13px;
}
.search-form input:focus {
  border-color: var(--primary-focus);
  outline: none;
  box-shadow: 0 0 0 3px var(--focus-ring);
}
.icon-btn {
  width: 44px; height: 44px; border: 0; border-radius: var(--radius-full);
  background: transparent; color: var(--ink-muted);
  display: grid; place-items: center; cursor: pointer; flex-shrink: 0;
  position: relative;
}
.icon-btn:hover { background: var(--hover-fill-strong); color: var(--ink); }

/* Theme toggle: show one icon based on preference */
.theme-toggle .theme-icon { display: none; }
.theme-toggle[data-mode="system"] .theme-icon-system,
.theme-toggle:not([data-mode]) .theme-icon-system { display: block; }
.theme-toggle[data-mode="light"] .theme-icon-light { display: block; }
.theme-toggle[data-mode="dark"] .theme-icon-dark { display: block; }

.nav-toggle-bars {
  width: 18px; height: 2px; background: currentColor; position: relative; display: block;
  box-shadow: 0 -6px 0 currentColor, 0 6px 0 currentColor;
}
.mobile-nav {
  display: flex; flex-direction: column; gap: 4px;
  padding: 12px; margin-bottom: var(--space-md);
}
.mobile-nav[hidden] { display: none !important; }

.main { max-width: var(--max); margin: 0 auto; }

.hero {
  padding: var(--space-lg) var(--space-md);
  margin-bottom: var(--space-md);
  position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; width: 240px; height: 240px;
  right: -50px; top: -80px; border-radius: 50%;
  background: radial-gradient(circle, rgba(94,106,210,.32), transparent 70%);
  pointer-events: none;
}
html[data-theme="light"] .hero::after {
  background: radial-gradient(circle, rgba(79,91,196,.16), transparent 70%);
}
.eyebrow {
  margin: 0 0 8px; font-size: 13px; font-weight: 500;
  letter-spacing: 0.4px; color: var(--primary-hover); text-transform: uppercase;
}
.hero h1, .article-head h1, .empty h1 {
  margin: 0; font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600; line-height: 1.12; letter-spacing: -1px;
}
.lede {
  margin: 12px 0 0; color: var(--ink-muted); font-size: 15px;
  line-height: 1.6; max-width: 52ch;
}

.post-list {
  display: grid; gap: var(--space-sm); margin-bottom: var(--space-md);
}
.pager--infinite {
  /* Keep in DOM for next-page URL; infinite.js hides when active */
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}
.pager--infinite[hidden] { display: none !important; }

.infinite-loader {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  margin: 0 0 var(--space-md);
  padding: 14px 16px;
  color: var(--ink-subtle); font-size: 13px; font-weight: 500;
}
.infinite-loader[hidden] { display: none !important; }
.infinite-loader.is-done { color: var(--ink-subtle); opacity: 0.85; }
.infinite-loader.is-error { color: var(--primary-hover); }
.infinite-spinner {
  width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid var(--hairline-strong);
  border-top-color: var(--primary);
  animation: md3-spin 0.7s linear infinite;
}
.infinite-loader:not(.is-loading) .infinite-spinner { display: none; }
.infinite-loader.is-done .infinite-spinner,
.infinite-loader.is-error .infinite-spinner { display: none; }
@keyframes md3-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .infinite-spinner { animation: none; border-top-color: var(--hairline-strong); }
}
.infinite-sentinel { height: 1px; width: 100%; pointer-events: none; }
.post-card {
  padding: var(--space-md);
  transition: border-color .2s, transform .2s;
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  box-sizing: border-box;
}
.post-card:hover {
  border-color: rgba(94,106,210,.35);
  transform: translateY(-1px);
}
html[data-theme="light"] .post-card:hover {
  border-color: rgba(79,91,196,.4);
}
@media (prefers-reduced-motion: reduce) {
  .post-card:hover { transform: none; }
}
.post-title {
  margin: 0 0 8px; font-size: 1.25rem; font-weight: 600; letter-spacing: -0.4px; line-height: 1.25;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.post-card-head { min-width: 0; max-width: 100%; }
.post-title a { color: var(--ink); text-decoration: none; }
.post-title a:hover { color: var(--primary-hover); }
.meta {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 8px 14px;
  color: var(--ink-subtle); font-size: 13px;
}
.meta a { color: var(--ink-subtle); }
.meta a:hover { color: var(--primary-hover); }
.excerpt {
  margin: 12px 0 16px; color: var(--ink-muted); font-size: 14.5px; line-height: 1.55;
  overflow-wrap: anywhere;
  word-break: break-word;
  max-width: 100%;
}

.btn {
  appearance: none; border: 0; cursor: pointer; font: inherit; font-weight: 500; font-size: 14px;
  min-height: 40px; padding: 0 16px; border-radius: var(--radius-md);
  display: inline-flex; align-items: center; gap: 8px;
  transition: background .18s, transform .18s, filter .18s;
  text-decoration: none; color: inherit;
}
.btn:hover { text-decoration: none; }
.btn.filled { background: var(--primary); color: var(--on-primary); }
.btn.filled:hover { background: var(--primary-hover); color: var(--on-primary); }
.btn.tonal {
  background: var(--tonal-bg); color: var(--primary-hover);
  border: 1px solid var(--tonal-border);
}
.btn.tonal:hover { background: var(--primary-container); color: var(--ink); }

.pager { padding: 10px 12px; margin-bottom: var(--space-md); }
.page-nav {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; align-items: center;
}
.page-nav li a, .page-nav li span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 36px; min-height: 36px; padding: 0 10px;
  border-radius: var(--radius-md); font-size: 13px; font-weight: 500;
  color: var(--ink-muted); text-decoration: none;
  border: 1px solid transparent;
}
.page-nav li a:hover {
  background: var(--hover-fill); color: var(--ink); text-decoration: none;
}
.page-nav li.current a, .page-nav li.current span {
  background: var(--primary); color: var(--on-primary);
}

.article {
  padding: var(--space-lg) var(--space-md);
  margin-bottom: var(--space-md);
}
.article-head { margin-bottom: var(--space-lg); }
.article-tags { margin-top: var(--space-xl); padding-top: var(--space-md); border-top: 1px solid var(--hairline); }
.article-tags a {
  display: inline-flex; margin: 4px 6px 0 0; padding: 4px 12px;
  border-radius: var(--radius-full); font-size: 12px;
  background: var(--surface-2); color: var(--ink-muted); border: 1px solid var(--hairline);
  text-decoration: none;
}
.article-tags a:hover { color: var(--ink); border-color: var(--primary); }

.content { font-size: 16px; line-height: 1.7; color: var(--ink-muted); }
.content > *:first-child { margin-top: 0; }
.content h1, .content h2, .content h3, .content h4 {
  color: var(--ink); font-weight: 600; letter-spacing: -0.4px; line-height: 1.25;
  margin: 1.6em 0 0.6em;
}
.content h2 { font-size: 1.35rem; }
.content h3 { font-size: 1.15rem; }
.content p, .content ul, .content ol, .content blockquote { margin: 0 0 1.1em; }
.content a { color: var(--primary-hover); }
.content blockquote {
  margin-left: 0; padding: 12px 16px;
  border-left: 3px solid var(--primary);
  background: var(--blockquote-bg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--ink-muted);
}
.content code {
  font-family: var(--font-mono); font-size: 0.9em;
  background: var(--code-inline-bg); padding: 2px 6px; border-radius: 4px;
  color: var(--ink);
}
.content pre {
  background: transparent; border: 0;
  border-radius: 0; padding: 14px 16px 16px; overflow-x: auto;
  margin: 0;
}
.content pre code { background: none; padding: 0; font-size: 13px; line-height: 1.55; display: block; }

/* macOS-style code window — stays dark in both themes */
.md3-code {
  position: relative;
  margin: 0 0 1.2em;
  border: 1px solid #2a2a2e;
  border-radius: 12px;
  background: #0c0c0e;
  box-shadow: 0 8px 28px rgba(0,0,0,.35);
  overflow: hidden;
}
html[data-theme="light"] .md3-code {
  border-color: #d8d9de;
  box-shadow: 0 8px 24px rgba(26,27,30,.12);
}
.md3-code-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 38px;
  padding: 0 14px;
  background: linear-gradient(180deg, #2a2a2e 0%, #1e1e22 100%);
  border-bottom: 1px solid rgba(255,255,255,.06);
  user-select: none;
}
.md3-code-lights {
  display: inline-flex;
  gap: 7px;
  flex-shrink: 0;
}
.md3-code-lights i {
  display: block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  box-shadow: inset 0 -1px 1px rgba(0,0,0,.25);
}
.md3-code-lights .r { background: #ff5f57; }
.md3-code-lights .y { background: #febc2e; }
.md3-code-lights .g { background: #28c840; }
.md3-code-lang {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: #8a8f98;
  opacity: .85;
}
.md3-code-copy {
  position: absolute;
  top: 6px;
  right: 8px;
  z-index: 2;
  height: 26px;
  padding: 0 10px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(30,30,34,.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: #d0d6e0;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity .18s ease, transform .18s ease, background .15s ease, color .15s ease;
}
.md3-code:hover .md3-code-copy,
.md3-code:focus-within .md3-code-copy,
.md3-code-copy:focus-visible {
  opacity: 1;
  transform: none;
}
.md3-code-copy:hover { background: rgba(94,106,210,.35); color: #f7f8f8; border-color: rgba(94,106,210,.5); }
.md3-code-copy.is-copied { opacity: 1; color: #28c840; border-color: rgba(40,200,64,.45); }
@media (hover: none) {
  .md3-code-copy { opacity: 1; transform: none; }
}

/* Prism tokens — Linear-ish dark (inside code chrome) */
.md3-code code[class*="language-"],
.md3-code pre[class*="language-"] {
  color: #e8eaed;
  text-shadow: none;
  font-family: var(--font-mono);
}
.token.comment,
.token.prolog,
.token.doctype,
.token.cdata { color: #6b7280; font-style: italic; }
.token.punctuation { color: #9aa0a6; }
.token.property,
.token.tag,
.token.boolean,
.token.number,
.token.constant,
.token.symbol,
.token.deleted { color: #ff7b72; }
.token.selector,
.token.attr-name,
.token.string,
.token.char,
.token.builtin,
.token.inserted { color: #a5d6ff; }
.token.operator,
.token.entity,
.token.url,
.language-css .token.string,
.style .token.string { color: #79c0ff; }
.token.atrule,
.token.attr-value,
.token.keyword { color: #ff7b72; }
.token.function,
.token.class-name { color: #d2a8ff; }
.token.regex,
.token.important,
.token.variable { color: #ffa657; }
.token.important,
.token.bold { font-weight: 600; }
.token.italic { font-style: italic; }
.content table { width: 100%; border-collapse: collapse; margin: 0 0 1.2em; font-size: 14px; }
.content th, .content td {
  border: 1px solid var(--hairline); padding: 8px 12px; text-align: left;
}
.content th { background: var(--surface-2); color: var(--ink); }
.content img {
  border-radius: var(--radius-lg); border: 1px solid var(--hairline);
}
.content hr { border: 0; border-top: 1px solid var(--hairline); margin: 2em 0; }

.comments {
  padding: var(--space-lg) var(--space-md);
  margin-bottom: var(--space-md);
}
.comments h2 { margin: 0 0 var(--space-md); font-size: 1.2rem; letter-spacing: -0.3px; }
.comment-list { list-style: none; margin: 0 0 var(--space-lg); padding: 0; }
.comment-list .comment-list { margin: 12px 0 0 16px; padding-left: 12px; border-left: 1px solid var(--hairline); }
.comment-author { font-weight: 600; color: var(--ink); }
.comment-meta { color: var(--ink-subtle); font-size: 12px; margin: 4px 0 8px; }
.comment-content { color: var(--ink-muted); font-size: 14.5px; }
.comment-reply a { font-size: 13px; }

.respond h3 { margin: 0 0 var(--space-md); font-size: 1.05rem; }
.form-row {
  display: grid; gap: var(--space-sm);
  grid-template-columns: 1fr;
  margin-bottom: var(--space-sm);
}
.field { margin-bottom: var(--space-sm); }
.field label {
  display: block; font-size: 12px; font-weight: 500;
  color: var(--ink-subtle); margin-bottom: 6px;
}
.field input, .field textarea {
  width: 100%; font: inherit; font-size: 15px; color: var(--ink);
  background: var(--field-bg);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-md); padding: 12px 14px; outline: none;
  resize: vertical;
}
.field input:focus, .field textarea:focus {
  border-color: var(--primary-focus);
  box-shadow: 0 0 0 3px var(--focus-ring);
}
.login-hint, .closed { color: var(--ink-subtle); font-size: 14px; }
.cancel-comment-reply { margin-bottom: 8px; font-size: 13px; }

.empty {
  padding: var(--space-xl) var(--space-md);
  text-align: center;
}
.empty h2 { margin: 0 0 8px; }
.empty p { color: var(--ink-muted); margin: 0 0 16px; }

.site-footer {
  max-width: var(--max); margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
  text-align: center;
}
.footer-inner p { margin: 0 0 6px; color: var(--ink-subtle); font-size: 12px; }
.footer-inner a { color: var(--ink-muted); }
.footer-meta strong { color: var(--ink-muted); font-weight: 500; }

.anim-in { opacity: 1; transform: none; }

@media (min-width: 768px) {
  .nav-desktop { display: flex; }
  .nav-toggle { display: none; }
  .search-form { display: block; }
  .mobile-nav { display: none !important; }
  .form-row { grid-template-columns: repeat(3, 1fr); }
  .shell { padding: var(--space-lg) var(--space-lg) 80px; }
  .hero, .article, .comments, .post-card { padding: var(--space-lg); }
}

@media (max-width: 767px) {
  .search-form { display: none; }
}

/* EditorMD client-render: keep mac window above plugin defaults */
.md_content .md3-code,
.content .md3-code {
  display: block;
  margin: 1.1em 0;
}
.md_content .md3-code pre,
.content .md3-code pre,
.md_content .md3-code pre.prettyprint {
  background: transparent !important;
  border: 0 !important;
  margin: 0 !important;
  padding: 14px 16px 16px !important;
  box-shadow: none !important;
}
.md_content .md3-code .linenums,
.content .md3-code .linenums { padding-left: 0; }