/* PromptLabster. Layout: lab notebook. Specimen cards in an index grid; papers read as a single measured column. */
:root {
  --paper: #EEF2F1;
  --surface: #FBFCFC;
  --ink: #13201E;
  --muted: #5A6A67;
  --line: #D3DCD9;
  --accent: #0B6F6A;
  --accent-ink: #FFFFFF;
  --accent-soft: #D7ECE9;
  --signal: #9A6412;
  --signal-soft: #F6E7C8;
  --code-bg: #16211F;
  --code-ink: #E3ECE9;
  --code-muted: #8FA3A0;
  --hl-yellow: rgba(214, 160, 40, .24);
  --hl-blue: rgba(40, 110, 200, .14);
  --hl-green: rgba(20, 140, 100, .16);
  --f-display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --f-body: "Newsreader", Georgia, "Times New Roman", serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  --shell: 1180px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --paper: #0E1514; --surface: #141D1B; --ink: #E2EBE8; --muted: #93A4A0; --line: #25322F;
    --accent: #45BDB4; --accent-ink: #0B1413; --accent-soft: #173331; --signal: #E6B24E; --signal-soft: #3A2E17;
    --code-bg: #0A100F; --code-ink: #DCE7E4; --code-muted: #7C908C;
    --hl-yellow: rgba(230, 178, 78, .22); --hl-blue: rgba(96, 160, 240, .2); --hl-green: rgba(69, 189, 180, .2);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 18px/1.6 var(--f-body); }
img { max-width: 100%; }
a { color: var(--accent); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
h1, h2, h3 { font-family: var(--f-display); text-wrap: balance; letter-spacing: -.015em; }
.shell { max-width: var(--shell); margin-inline: auto; padding-inline: 20px; }
.sr, .skip { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip:focus { position: fixed; top: 8px; left: 8px; width: auto; height: auto; clip: auto; background: var(--ink); color: var(--paper); padding: 8px 12px; z-index: 10; }

/* header / footer */
.site-head { border-bottom: 1px solid var(--line); background: var(--paper); position: sticky; top: 0; z-index: 5; padding-top: env(safe-area-inset-top, 0px); }
.head-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 14px; }
.wordmark { font: 800 23px/1 var(--f-display); letter-spacing: -.03em; color: var(--ink); text-decoration: none; }
.wordmark span { color: var(--accent); }
.wordmark.small { font-size: 17px; }
.nav { display: flex; gap: 22px; font: 600 15px var(--f-display); }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.site-foot { border-top: 1px solid var(--line); margin-top: 72px; }
.foot-row { display: flex; flex-wrap: wrap; gap: 8px 28px; align-items: baseline; padding-block: 28px 40px; font: 13px/1.5 var(--f-mono); color: var(--muted); }

/* hero */
.hero { padding-block: 64px 36px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, 400px); gap: 32px 56px; align-items: end; }
.hero .subscribe { margin-top: 0; grid-template-columns: 1fr; padding: 26px; }
.hero .subscribe h2 { font-size: 22px; }
.hero .subscribe p { font-size: 16px; }
.eyebrow { font: 500 12px var(--f-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--accent); margin: 0 0 14px; }
.hero h1 { font-weight: 800; font-size: clamp(34px, 5.6vw, 64px); line-height: 1.02; margin: 0; max-width: 17ch; }
.hero-sub { font-size: 20px; color: var(--muted); max-width: 58ch; margin: 22px 0 0; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 10px 28px; margin-top: 28px; font: 14px var(--f-mono); color: var(--muted); }
.hero-facts b { color: var(--ink); font-weight: 500; font-size: 17px; margin-right: 4px; }
.button { display: inline-block; font: 600 15px var(--f-display); background: var(--accent); color: var(--accent-ink); padding: 10px 18px; border-radius: 6px; text-decoration: none; margin-top: 16px; }

/* blocks & cards */
.block { padding-top: 48px; }
.block-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; border-bottom: 1px solid var(--ink); padding-bottom: 10px; margin-bottom: 4px; }
.block-head h1, .block-head h2 { margin: 0; font-weight: 700; font-size: 26px; }
.block-head a, .block-head .count { font: 13px var(--f-mono); color: var(--muted); white-space: nowrap; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); border-left: 1px solid var(--line); }
.grid.three { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.card { display: flex; flex-direction: column; gap: 10px; padding: 20px 20px 18px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: transparent; transition: background .15s; }
.card:hover { background: var(--surface); }
.card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; }
.card-title { font: 600 19px/1.25 var(--f-display); color: var(--ink); text-decoration: none; text-wrap: balance; }
.card-title:hover { color: var(--accent); }
.card.big .card-title { font-size: 23px; font-weight: 700; }
.card-kr { margin: 0; color: var(--muted); font-size: 16.5px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.card.big .card-kr { -webkit-line-clamp: 6; font-size: 17px; }
.card-meta { margin-top: auto; display: flex; flex-wrap: wrap; gap: 6px 14px; font: 12.5px var(--f-mono); color: var(--muted); }
.card-meta a { color: var(--muted); text-decoration: none; border-bottom: 1px dotted var(--line); }
.card-meta a:hover { color: var(--accent); }
.score { flex: none; font: 500 13px/1 var(--f-mono); padding: 5px 7px; border-radius: 4px; background: var(--accent-soft); color: var(--accent); font-variant-numeric: tabular-nums; }
.score.hi { background: var(--signal-soft); color: var(--signal); }

.topics { display: flex; flex-wrap: wrap; gap: 8px; padding-top: 16px; }
.topic { font: 500 14px var(--f-display); color: var(--ink); text-decoration: none; border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; }
.topic span { font-family: var(--f-mono); color: var(--muted); font-size: 12px; margin-left: 4px; }
.topic:hover { border-color: var(--accent); color: var(--accent); }

/* subscribe */
.subscribe { margin-top: 48px; display: grid; grid-template-columns: 1fr minmax(280px, 440px); gap: 20px 40px; align-items: center; background: var(--ink); color: var(--paper); border-radius: 12px; padding: 32px; }
.subscribe h2 { margin: 0 0 6px; font-size: 26px; font-weight: 700; color: var(--paper); }
.subscribe p { margin: 0; opacity: .78; font-size: 17px; max-width: 48ch; }
.sub-form { display: flex; flex-wrap: wrap; gap: 8px; }
.sub-form input { flex: 1 1 200px; font: 16px var(--f-display); padding: 11px 14px; border-radius: 6px; border: 1px solid transparent; background: var(--paper); color: var(--ink); }
.sub-form button { font: 700 15px var(--f-display); padding: 11px 18px; border: 0; border-radius: 6px; background: var(--accent); color: var(--accent-ink); cursor: pointer; }
.sub-form .sub-msg { flex-basis: 100%; font: 14px var(--f-mono); opacity: .9; min-height: 1.4em; }

/* catalog */
.catalog { display: grid; grid-template-columns: 240px 1fr; gap: 36px; padding-top: 36px; }
.filter-box { position: sticky; top: 80px; }
.filter-box > summary { display: none; }
.filter-form { display: flex; flex-direction: column; gap: 6px; }
.filter-form label { font: 500 11.5px var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-top: 10px; }
.filter-form input, .filter-form select { font: 15px var(--f-display); padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); color: var(--ink); width: 100%; }
.filter-form button { margin-top: 16px; font: 700 15px var(--f-display); padding: 9px; border: 0; border-radius: 6px; background: var(--ink); color: var(--paper); cursor: pointer; }
.reset { font: 13px var(--f-mono); margin-top: 8px; }
.empty { padding: 40px 0; color: var(--muted); }
.pager { display: flex; flex-wrap: wrap; gap: 6px; padding-top: 24px; }
.pager a { font: 14px var(--f-mono); padding: 6px 11px; border: 1px solid var(--line); border-radius: 4px; text-decoration: none; color: var(--ink); }
.pager a[aria-current="page"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* paper */
.paper { max-width: 780px; padding-top: 28px; }
.crumbs { display: flex; gap: 8px; font: 13px var(--f-mono); color: var(--muted); }
.crumbs a { color: var(--muted); }
.paper-head { padding-top: 22px; }
.paper-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; font: 13px var(--f-mono); color: var(--muted); }
.paper-head h1 { font-weight: 800; font-size: clamp(30px, 4.6vw, 46px); line-height: 1.06; margin: 14px 0 16px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag { font: 12.5px var(--f-mono); color: var(--muted); border: 1px solid var(--line); border-radius: 4px; padding: 3px 8px; text-decoration: none; }
.tag:hover { color: var(--accent); border-color: var(--accent); }
.kr { margin-top: 28px; padding: 20px 22px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.kr p { margin: 0; font-size: 19px; line-height: 1.55; }
.kr-label, .dg-label { font: 500 11.5px var(--f-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }
.tabs { display: flex; gap: 4px; margin-top: 36px; border-bottom: 1px solid var(--line); overflow-x: auto; position: sticky; top: var(--head-h, 51px); background: var(--paper); z-index: 3; }
.tabs button { font: 600 15px var(--f-display); padding: 12px 14px; border: 0; border-bottom: 2px solid transparent; background: none; color: var(--muted); cursor: pointer; white-space: nowrap; }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.js .panel[hidden] { display: none; }
.panel { padding-top: 12px; }
.source { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line); }
.source p { margin: 0 0 4px; }
.muted { color: var(--muted); font: 13px var(--f-mono); }
.uses { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 18px; }
.uses b { display: block; font: 600 17px var(--f-display); }
.uses span { color: var(--muted); }
.dg { padding-top: 22px; }
.dg p { margin: 0 0 10px; }

/* prose (translated article HTML) */
.prose h2 { font-weight: 700; font-size: 25px; line-height: 1.2; margin: 1.7em 0 .5em; }
.prose h3 { font-weight: 600; font-size: 20px; margin: 1.4em 0 .4em; }
.prose p, .prose li { max-width: 68ch; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.2em 0; }
.prose code { font-family: var(--f-mono); font-size: .82em; background: var(--accent-soft); padding: 1px 5px; border-radius: 3px; }
.prose pre { background: var(--code-bg); color: var(--code-ink); padding: 44px 18px 18px; border-radius: 8px; overflow-x: auto; white-space: pre-wrap; font: 14.5px/1.6 var(--f-mono); position: relative; margin: 0; }
.prose pre code { background: none; padding: 0; font-size: inherit; color: inherit; }
.prose .code-block-wrapper, .prose .code-block { position: relative; margin: 1.3em 0; }
.prose .code-header { display: none; }
.prose .copy-button, .prose .copy-btn, .prose .code-copy-btn, .prose .pl-copy { position: absolute; top: 10px; right: 10px; z-index: 1; font: 500 12px var(--f-mono); background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 4px; padding: 5px 10px; cursor: pointer; }
.prose .pl-lang { position: absolute; top: 12px; left: 18px; font: 11px var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--code-muted); }
.prose table { border-collapse: collapse; display: block; overflow-x: auto; font-size: 16px; margin: 1em 0; }
.prose th, .prose td { border: 1px solid var(--line); padding: 7px 11px; text-align: left; vertical-align: top; }
.prose blockquote { margin: 1.2em 0; padding-left: 18px; border-left: 2px solid var(--accent); color: var(--muted); }
.prose .highlight-yellow { background: var(--hl-yellow); padding: 0 2px; }
.prose .highlight-blue { background: var(--hl-blue); padding: 0 2px; }
.prose .highlight-green { background: var(--hl-green); padding: 0 2px; }
.kr .highlight-yellow { background: var(--hl-yellow); }
.kr .highlight-blue { background: var(--hl-blue); }
.kr .highlight-green { background: var(--hl-green); }

@media (max-width: 860px) {
  .catalog { grid-template-columns: 1fr; gap: 8px; }
  .hero { grid-template-columns: 1fr; }
  .filter-box { position: static; border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; background: var(--surface); }
  .filter-box > summary { display: list-item; cursor: pointer; font: 600 15px var(--f-display); }
  .subscribe { grid-template-columns: 1fr; padding: 24px 20px; }
}
@media (max-width: 480px) {
  body { font-size: 17px; }
  .nav { gap: 16px; }
  .grid, .grid.three { grid-template-columns: 1fr; }
  .card { padding-inline: 16px; }
  .hero { padding-top: 40px; }
  .hero-sub { font-size: 18px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* about / privacy */
.doc { max-width: 760px; padding-top: 48px; }
.doc h1 { font-weight: 800; font-size: clamp(32px, 5vw, 50px); line-height: 1.05; margin: 0 0 16px; }
.doc h2 { font-weight: 700; font-size: 24px; margin: 44px 0 10px; scroll-margin-top: calc(var(--head-h, 51px) + 16px); }
.doc p, .doc li { max-width: 66ch; }
.doc ul { padding-left: 20px; display: grid; gap: 8px; }
.doc-lede { font-size: 20px; color: var(--muted); margin: 0; }
.doc-date { font: 13px var(--f-mono); color: var(--muted); margin: 0 0 18px; }
.doc-facts { display: flex; flex-wrap: wrap; gap: 12px 40px; margin-top: 32px; padding-block: 18px; border-block: 1px solid var(--line); }
.doc-facts div { display: flex; flex-direction: column; }
.doc-facts b { font: 700 30px/1.1 var(--f-display); font-variant-numeric: tabular-nums; }
.doc-facts span { font: 12.5px var(--f-mono); color: var(--muted); }
.steps { list-style: none; counter-reset: s; padding: 0; margin: 16px 0 0; display: grid; gap: 16px; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 34px 1fr; gap: 12px; }
.steps li::before { content: counter(s); font: 500 13px/28px var(--f-mono); text-align: center; width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--accent); color: var(--accent); }
.tablewrap { overflow-x: auto; }
.scale { border-collapse: collapse; width: 100%; font-size: 16.5px; margin-top: 10px; }
.scale th, .scale td { text-align: left; padding: 10px 12px 10px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.scale th { font: 500 11.5px var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.toc { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 26px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); font: 13.5px var(--f-mono); }
.foot-nav { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.foot-nav a { color: var(--muted); }
.sub-form .sub-legal { flex-basis: 100%; margin: 2px 0 0; font: 12.5px/1.45 var(--f-mono); opacity: .7; }
.sub-form .sub-legal a { color: inherit; }

/* internal brand gallery */
.brand-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; margin-top: 16px; }
.brand-tile { margin: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; display: flex; flex-direction: column; }
.brand-tile > a img { display: block; width: 100%; aspect-ratio: 1; object-fit: contain; background: #F6F3EE; }
.brand-dark { background: #13233A; padding: 10px; display: flex; justify-content: center; }
.brand-dark img { height: 72px; width: auto; border-radius: 6px; }
.brand-tile figcaption { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; padding: 10px 12px; font: 13px var(--f-mono); }
.brand-model { color: var(--accent); }
.brand-mini { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.brand-mini img { border-radius: 3px; object-fit: cover; }