/* blog.ahmetbirinci.dev - one stylesheet, ported from the Claude Design system.
   Warm near-black canvas, glass surfaces, one amber accent, mono as identity.
   Dark is the design; light mode is the documented afterthought. */

/* ============================ TOKENS ============================ */
:root {
  /* Canvas */
  --bg-canvas: #0c0a08;
  --bg-sheet: #17130e;
  --bg-code: #0a0806;

  /* Glass - material, not color */
  --glass-fill: rgba(255,255,255,0.05);
  --glass-fill-subtle: rgba(255,255,255,0.03);
  --glass-border: rgba(255,255,255,0.10);
  --glass-hairline: rgba(255,255,255,0.06);
  --glass-highlight: rgba(255,255,255,0.15);
  --divider: rgba(255,255,255,0.08);

  /* Text */
  --text-primary: rgba(255,255,255,0.95);
  --text-secondary: rgba(240,234,226,0.60);
  --text-tertiary: rgba(240,234,226,0.35);
  --text-quaternary: rgba(240,234,226,0.18);

  /* Amber accent - the only color */
  --accent: #ffa047;
  --accent-dim: rgba(255,160,71,0.65);
  --accent-faint: rgba(255,160,71,0.28);
  --accent-wash: rgba(255,160,71,0.10);
  --text-on-accent: #1a0f04;

  --border-live: var(--accent-faint);
  --link: var(--accent);

  /* Type */
  --font-display: "SF Pro Rounded", ui-rounded, -apple-system, system-ui, sans-serif;
  --font-text: -apple-system, "SF Pro Text", BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --type-brand: 600 17px/1.2 var(--font-display);
  --type-nav: 500 12.5px/1.2 var(--font-text);
  --type-nav-active: 600 12.5px/1.2 var(--font-text);
  --type-display: 700 42px/1.12 var(--font-display);
  --type-title: 600 22px/1.25 var(--font-display);
  --type-row: 600 17px/1.35 var(--font-display);
  --type-article-title: 700 34px/1.2 var(--font-display);
  --type-body: 400 15px/1.55 var(--font-text);
  --type-body-sm: 400 13.5px/1.55 var(--font-text);
  --type-article-body: 400 16px/1.75 var(--font-text);
  --type-meta: 400 12.5px/1.5 var(--font-mono);
  --type-tag: 400 12px/1.5 var(--font-mono);
  --type-code: 400 13.5px/1.7 var(--font-mono);
  --tracking-tight: -0.01em;
  --measure-article: 65ch;

  /* Spacing & shape */
  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px; --space-8: 64px;
  --page-pad-x: 48px;
  --page-max: 980px;
  --measure-max: 64ch;
  --radius-btn: 12px;
  --radius-card: 18px;
  --radius-sheet: 24px;
  --radius-pill: 9999px;

  /* Effects */
  --blur-glass: blur(20px) saturate(180%);
  --glow-accent: 0 0 24px rgba(255,140,50,0.10);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.35);
  --bloom-accent: radial-gradient(closest-side, rgba(255,159,69,0.12), transparent);
  --bloom-accent-faint: radial-gradient(closest-side, rgba(255,120,40,0.06), transparent);
}
[data-theme="light"] {
  --bg-canvas: #f5efe6;
  --bg-sheet: #ece4d7;
  --bg-code: #241d15;
  --glass-fill: rgba(28,20,12,0.05);
  --glass-fill-subtle: rgba(28,20,12,0.03);
  --glass-border: rgba(28,20,12,0.12);
  --glass-hairline: rgba(28,20,12,0.07);
  --glass-highlight: rgba(28,20,12,0.18);
  --divider: rgba(28,20,12,0.10);
  --text-primary: rgba(26,19,12,0.95);
  --text-secondary: rgba(46,36,26,0.62);
  --text-tertiary: rgba(46,36,26,0.40);
  --text-quaternary: rgba(46,36,26,0.20);
  --accent: #b56516;
  --accent-dim: rgba(181,101,22,0.80);
  --accent-faint: rgba(181,101,22,0.35);
  --accent-wash: rgba(181,101,22,0.10);
  --text-on-accent: #fff6ea;
  --glow-accent: 0 0 24px rgba(214,126,40,0.14);
  --bloom-accent: radial-gradient(closest-side, rgba(214,126,40,0.14), transparent);
  --bloom-accent-faint: radial-gradient(closest-side, rgba(214,126,40,0.07), transparent);
}

/* ============================ BASE ============================ */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--link); text-decoration: none; }
img { max-width: 100%; }
::selection { background: var(--accent-wash); }

.page { position: relative; max-width: var(--page-max); margin: 0 auto; min-height: 100vh; }
.pad { padding: 0 var(--page-pad-x); position: relative; }
.stack > * + * { margin-top: var(--space-5); }

.bloom {
  position: absolute; width: 560px; height: 560px; pointer-events: none;
  background: var(--bloom-accent); top: -160px; right: -120px; z-index: 0;
}
.bloom--left { background: var(--bloom-accent-faint); top: auto; right: auto; bottom: -200px; left: -160px; }

/* ============================ NAV ============================ */
.nav { display: flex; align-items: center; gap: 20px; padding: 28px var(--page-pad-x) 16px; position: relative; z-index: 2; }
.nav__brand { font: var(--type-brand); color: var(--text-primary); margin-right: auto; }
.nav__pills { display: flex; align-items: center; gap: 4px; background: var(--glass-fill);
  border: 1px solid var(--glass-border); border-radius: var(--radius-pill); padding: 5px 6px; backdrop-filter: var(--blur-glass); }
.nav__pill { font: var(--type-nav); color: var(--text-secondary); border-radius: var(--radius-pill);
  padding: 6px 14px; transition: color .2s, background .2s; }
.nav__pill:hover { color: var(--text-primary); }
.nav__pill.is-active { font: var(--type-nav-active); color: var(--text-on-accent); background: var(--accent); }
.nav__icon { color: var(--text-secondary); display: flex; background: none; border: 0; cursor: pointer; padding: 0; font: var(--type-meta); }
.nav__icon:hover { color: var(--accent); }

/* ============================ FOOTER ============================ */
.footer { display: flex; flex-wrap: wrap; gap: 22px; padding: var(--space-7) var(--page-pad-x);
  font: var(--type-meta); color: var(--text-quaternary); position: relative; z-index: 1; }
.footer a { color: var(--text-secondary); }
.footer a:hover { color: var(--accent); }

/* ============================ HERO ============================ */
.hero { padding: 48px var(--page-pad-x) 8px; max-width: 720px; position: relative; z-index: 1; }
.hero h1 { font: var(--type-display); letter-spacing: var(--tracking-tight); margin: 0 0 16px; }
.hero--sm h1 { font: var(--type-article-title); }
.hero p { font: var(--type-body); color: var(--text-secondary); margin: 0; max-width: 56ch; }
.section-label { font: var(--type-tag); color: var(--text-tertiary); padding: 0 var(--page-pad-x); margin-bottom: 10px; }

/* ============================ CARDS / GLASS ============================ */
.card { background: var(--glass-fill); border: 1px solid var(--glass-border); border-radius: var(--radius-card);
  padding: var(--space-5) 30px; backdrop-filter: var(--blur-glass); position: relative; }
.card--live { border-color: var(--border-live); box-shadow: var(--glow-accent); }
.card--subtle { background: var(--glass-fill-subtle); border-color: var(--glass-hairline); backdrop-filter: none; }
.panel { background: var(--glass-fill-subtle); border: 1px solid var(--glass-hairline);
  border-radius: var(--radius-sheet); padding: 6px 26px; position: relative; }

/* ============================ META / TAGS ============================ */
.meta { font: var(--type-meta); color: var(--text-tertiary); display: flex; flex-wrap: wrap; gap: 8px; align-items: baseline; }
.meta--accent { color: var(--accent); }
.meta__tags { color: var(--text-quaternary); }
.tags { font: var(--type-tag); color: var(--accent-dim); display: flex; flex-wrap: wrap; gap: 8px; }
.tags a { color: var(--accent-dim); }
.tags a:hover { color: var(--accent); }
.badge-tr { color: var(--accent); font: var(--type-tag); }

/* ============================ FEATURED / ROWS ============================ */
.featured .series-tag { font: var(--type-tag); color: var(--text-tertiary); margin: 12px 0 8px; }
.featured h3 { font: var(--type-title); margin: 0 0 10px; }
.featured h3 a { color: var(--text-primary); }
.featured h3 a:hover { color: var(--accent); }
.featured p { font: var(--type-body-sm); color: var(--text-secondary); margin: 0 0 14px; max-width: var(--measure-max); }

.post-row { display: flex; justify-content: space-between; align-items: baseline; gap: 20px;
  padding: 17px 0; border-bottom: 1px solid var(--divider); }
.post-row:last-child { border-bottom: none; }
.post-row__main { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.post-row__series { font: var(--type-tag); color: var(--accent-dim); }
.post-row__title { font: var(--type-row); color: var(--text-primary); }
.post-row__title:hover { color: var(--accent); }
.post-row__date { font: var(--type-meta); color: var(--text-tertiary); flex: none; }

/* ============================ SERIES ============================ */
.series-card .series-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 10px; }
.series-card .kw { font: var(--type-tag); color: var(--accent); }
.series-card .count { font: var(--type-tag); color: var(--text-tertiary); }
.series-card h3 { font: var(--type-title); margin: 0 0 8px; }
.series-card h3 a { color: var(--text-primary); }
.series-card h3 a:hover { color: var(--accent); }
.series-card p { font: var(--type-body-sm); color: var(--text-secondary); margin: 0 0 16px; max-width: var(--measure-max); }
.series-progress { display: flex; gap: 4px; margin-bottom: 14px; }
.series-progress span { height: 3px; flex: 1; border-radius: 2px; background: var(--glass-border); }
.series-progress span.on { background: var(--accent); }
.series-more { font: var(--type-meta); color: var(--accent); }

.part-row { display: flex; gap: 20px; align-items: baseline; padding: 18px 0; border-bottom: 1px solid var(--divider);
  border-left: 2px solid transparent; padding-left: 16px; margin-left: -18px; }
.part-row:last-child { border-bottom: none; }
.part-row.is-current { border-left-color: var(--accent); }
.part-row__n { font: var(--type-meta); color: var(--accent); flex: none; width: 26px; }
.part-row.is-planned .part-row__n { color: var(--text-quaternary); }
.part-row__body { flex: 1; display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.part-row__title { font: var(--type-row); color: var(--text-primary); }
.part-row__title:hover { color: var(--accent); }
.part-row.is-current .part-row__title { color: var(--accent); }
.part-row.is-planned .part-row__title { color: var(--text-tertiary); }
.part-row__date { font: var(--type-meta); color: var(--text-quaternary); flex: none; }

.series-ribbon { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.series-ribbon a { font: var(--type-meta); color: var(--accent); }
.series-ribbon .sep { color: var(--text-quaternary); font: var(--type-meta); }
.series-ribbon .lbl { font: var(--type-meta); color: var(--text-secondary); }
.series-ribbon .seg { display: flex; gap: 3px; margin-left: 4px; }
.series-ribbon .seg span { width: 14px; height: 3px; border-radius: 2px; background: var(--glass-border); }
.series-ribbon .seg span.on { background: var(--accent); }
.series-nav { display: flex; gap: 32px; padding-top: var(--space-5); border-top: 1px solid var(--divider); }
.series-nav__cell { flex: 1; display: flex; flex-direction: column; gap: 6px; }
.series-nav__cell.right { align-items: flex-end; text-align: right; }
.series-nav__cell .lbl { font: var(--type-tag); color: var(--text-quaternary); }
.series-nav__cell a { font: var(--type-row); color: var(--text-primary); }
.series-nav__cell a:hover { color: var(--accent); }
.series-nav__cell .dim { font: var(--type-body-sm); color: var(--text-quaternary); }

/* ============================ LAB ============================ */
.labrow { display: flex; align-items: center; gap: 18px; }
.labrow__body { flex: 1; }
.labrow__title { font: var(--type-row); color: var(--text-primary); }
.labrow__blurb { font: var(--type-body-sm); color: var(--text-secondary); }
.labrow__caret { font: var(--type-meta); color: var(--text-tertiary); }
.lab-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }
.lab-card { display: flex; flex-direction: column; gap: 10px; padding: 22px 24px; }
.lab-card__thumb { height: 96px; border-radius: var(--radius-btn); background: var(--bg-code);
  border: 1px solid var(--glass-hairline); display: grid; place-items: center; }
.lab-card__thumb span { font: var(--type-tag); color: var(--text-quaternary); }
.lab-card__title { font: var(--type-row); color: var(--text-primary); }
.lab-card__blurb { font: var(--type-body-sm); color: var(--text-secondary); }
.lab-card__open { font: var(--type-meta); color: var(--accent); margin-top: auto; }
kbd { font: var(--type-tag); color: var(--accent); border: 1px solid var(--glass-border); border-radius: 4px; padding: 1px 6px; }

/* ============================ BUTTONS ============================ */
.btn { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-family: var(--font-text);
  font-size: 13px; font-weight: 600; padding: 9px 18px; border-radius: var(--radius-btn);
  border: 1px solid transparent; background: transparent; color: var(--text-primary);
  transition: border-color .2s, background .2s; }
.btn--pill { border-radius: var(--radius-pill); }
.btn--primary { background: var(--accent); color: var(--text-on-accent); }
.btn--glass { background: var(--glass-fill); border-color: var(--glass-border); backdrop-filter: var(--blur-glass); }
.btn--glass:hover { border-color: var(--glass-highlight); }

.notice { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.notice span { font: var(--type-body-sm); color: var(--text-secondary); }

/* ============================ ARTICLE PROSE ============================ */
.article-head { padding: 40px var(--page-pad-x) 0; position: relative; z-index: 1; max-width: 760px; }
.article-head h1 { font: var(--type-article-title); letter-spacing: var(--tracking-tight); margin: 0 0 14px; }
.prose { padding: 32px var(--page-pad-x) 0; position: relative; z-index: 1;
  max-width: calc(var(--measure-article) + 96px); font: var(--type-article-body); color: var(--text-secondary); }
.prose h2 { font: var(--type-title); color: var(--text-primary); letter-spacing: var(--tracking-tight); margin: var(--space-6) 0 var(--space-3); }
.prose h3 { font: var(--type-row); color: var(--text-primary); margin: var(--space-5) 0 var(--space-2); }
.prose p { margin: 0 0 var(--space-4); }
.prose a { color: var(--accent); text-underline-offset: 3px; text-decoration: underline; text-decoration-color: var(--accent-faint); }
.prose a:hover { text-decoration-color: var(--accent); }
.prose strong { color: var(--text-primary); font-weight: 600; }
.prose ul, .prose ol { margin: 0 0 var(--space-4); padding-left: 24px; }
.prose li { margin: 0 0 6px; }
.prose code { font: var(--type-code); color: var(--accent-dim); background: var(--glass-fill-subtle);
  border: 1px solid var(--glass-hairline); border-radius: 5px; padding: 1px 5px; }
.prose blockquote { margin: var(--space-6) 0; padding-left: 18px; border-left: 2px solid var(--accent-faint); }
.prose blockquote p { font: var(--type-title); color: var(--text-primary); max-width: 46ch; margin: 0; }
.prose hr { border: 0; border-top: 1px solid var(--divider); margin: var(--space-6) 0; }
.prose img { border: 1px solid var(--glass-border); border-radius: var(--radius-card); margin: 0 0 var(--space-5); }

/* Cover + figure images */
.article-cover { margin: 0; max-width: calc(var(--measure-article) + 96px); }
.article-cover img { width: 100%; border: 1px solid var(--glass-border); border-radius: var(--radius-card); display: block; }
.article-cover figcaption, .prose figure figcaption { font: var(--type-meta); color: var(--text-tertiary); margin-top: 10px; }
.prose figure { margin: 0 0 var(--space-5); }
.prose p > img, .prose figure img { border-radius: var(--radius-card); }

/* Tables */
.table-scroll { overflow-x: auto; margin: 0 0 var(--space-5); border: 1px solid var(--glass-hairline);
  border-radius: var(--radius-card); }
.prose table { border-collapse: collapse; width: 100%; font: var(--type-body-sm); }
.prose th, .prose td { text-align: left; padding: 10px 16px; border-bottom: 1px solid var(--divider); vertical-align: top; }
.prose th { font: var(--type-tag); color: var(--accent-dim); white-space: nowrap; }
.prose tr:last-child td { border-bottom: none; }

/* Code blocks */
.codeblock { margin: 0 0 var(--space-5); }
.codeblock__bar { display: flex; align-items: center; gap: 10px; padding: 10px 16px;
  background: var(--glass-fill-subtle); border: 1px solid var(--glass-hairline); border-bottom: 0;
  border-radius: var(--radius-card) var(--radius-card) 0 0; }
.codeblock__lang { font: var(--type-tag); color: var(--accent-dim); }
.codeblock__file { font: var(--type-tag); color: var(--text-tertiary); }
.codeblock__copy { margin-left: auto; background: none; border: 0; cursor: pointer; font: var(--type-tag);
  color: var(--text-tertiary); padding: 0; }
.codeblock__copy:hover, .codeblock__copy.copied { color: var(--accent); }
.codeblock pre { margin: 0; padding: 18px 20px; background: var(--bg-code); border: 1px solid var(--glass-hairline);
  border-radius: 0 0 var(--radius-card) var(--radius-card); overflow-x: auto; }
.codeblock pre code { font: var(--type-code); color: var(--text-secondary); background: none; border: 0; padding: 0; }

/* ============================ 404 ============================ */
.nf { padding: 72px var(--page-pad-x) 0; position: relative; z-index: 1; max-width: 700px; }
.nf__code { font: var(--type-meta); color: var(--accent); margin-bottom: 18px; }
.nf h1 { font: var(--type-display); letter-spacing: var(--tracking-tight); margin: 0 0 16px; }
.nf p { font: var(--type-body); color: var(--text-secondary); margin: 0 0 24px; max-width: 52ch; }
.nf__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 4px; }

/* ============================ CARDS GRID (about) ============================ */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.card-grid .card { padding: 20px 22px; }
.card-grid .k { font: var(--type-tag); color: var(--accent); margin-bottom: 8px; }
.card-grid .v { font: var(--type-body-sm); color: var(--text-secondary); line-height: 1.8; }
.card-grid .v.mono { font: var(--type-code); }

/* ============================ TERMINAL (~) ============================ */
.term-overlay { position: fixed; inset: 0; background: rgba(6,4,3,0.6); backdrop-filter: blur(6px); z-index: 50;
  display: grid; place-items: start center; padding-top: 12vh; }
.term-overlay[hidden] { display: none; }
.term { width: min(680px, 92vw); background: var(--bg-code); border: 1px solid var(--accent-faint);
  border-radius: var(--radius-card); box-shadow: var(--glow-accent); overflow: hidden; }
.term__bar { display: flex; align-items: center; gap: 10px; padding: 10px 16px; border-bottom: 1px solid var(--glass-hairline); font: var(--type-tag); }
.term__bar .p { color: var(--accent); }
.term__bar .h { color: var(--text-tertiary); }
.term__bar .x { margin-left: auto; background: none; border: 0; cursor: pointer; font: var(--type-tag); color: var(--text-tertiary); }
.term__out { max-height: 260px; overflow-y: auto; padding: 14px 16px; font: var(--type-code); }
.term__out .in { color: var(--text-primary); }
.term__out .in::before { content: "$ "; color: var(--accent); }
.term__out .out { color: var(--text-secondary); }
.term__in { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--glass-hairline); }
.term__in span { font: var(--type-code); color: var(--accent); }
.term__in input { flex: 1; background: none; border: 0; outline: none; font: var(--type-code); color: var(--text-primary); }

/* ============================ RESPONSIVE ============================ */
@media (max-width: 640px) {
  :root { --page-pad-x: 20px; }
  .hero h1 { font-size: 32px; }
  .nf h1 { font-size: 32px; }
  .nav { flex-wrap: wrap; gap: 12px; }
  .nav__brand { margin-right: 0; width: 100%; }
  .post-row { flex-direction: column; gap: 6px; }
}

/* Motion: honour the user's preference - kill everything. */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}