/* nlir docs pages (README → index, SPEC → spec, showcase gallery). Tokens and
   base come from theme.css. */

/* ---- hero (index) -------------------------------------------------------- */
.hero {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  max-width: 78rem; margin: 0 auto; padding: clamp(3rem, 8vw, 6.5rem) clamp(1rem, 4vw, 2.4rem) clamp(2.5rem, 6vw, 4.5rem);
}
.hero > * { min-width: 0; }
@media (max-width: 960px) { .hero { grid-template-columns: minmax(0, 1fr); } }
.hero h1 {
  font: 500 clamp(2.6rem, 5.4vw, 4.4rem)/1.02 var(--serif);
  letter-spacing: -.02em; color: var(--ink); margin: 0 0 1.2rem;
}
.hero h1 em { font-style: italic; color: var(--accent-ink); }
.hero h1 code { font: 500 .78em/1 var(--mono); letter-spacing: -.04em; color: var(--ink); background: none; padding: 0; }
.hero .lede { font-size: 1.12rem; color: var(--ink-2); max-width: 31rem; margin: 0 0 1.8rem; }
.hero .actions { display: flex; gap: .7rem; flex-wrap: wrap; }

.live { padding: 0; overflow: hidden; }
.live .row { display: flex; align-items: stretch; border-bottom: 1px solid var(--console-rule); min-width: 0; }
.live .row button { flex: 0 0 auto; }
.live input {
  flex: 1; min-width: 0; background: transparent; border: 0; color: var(--console-ink);
  font: 400 .95rem/1.5 var(--mono); padding: 1rem 1.1rem; outline: none;
}
.live .row button { border: 0; border-left: 1px solid var(--console-rule); border-radius: 0; color: var(--console-ink); background: transparent; font-family: var(--mono); font-size: .82rem; padding: 0 1.05rem; }
.live .row button:hover { background: var(--console-2); }
.live .row button.go { color: var(--syn-op); }
.live .out { padding: 1.15rem 1.2rem 1.25rem; min-height: 5.2rem; background: var(--paper); border-top: 0; }
.live .out .prose-out { display: flex; gap: .7rem; align-items: baseline; }
.live .out .ph { color: var(--muted); font: italic 400 1.05rem/1.4 var(--serif); }
.live .out .err { color: var(--danger); font: .85rem/1.5 var(--mono); }
.live .out .step { font: .82rem/1.65 var(--mono); color: var(--ink-2); border-left: 2px solid var(--rule); padding-left: .7rem; }
.live .out .step:last-child { border-left-color: var(--accent); color: var(--ink); }
.live .tabs { display: flex; gap: 0; border-top: 1px solid var(--console-rule); overflow-x: auto; scrollbar-width: none; }
.live .tabs button { border: 0; border-right: 1px solid var(--console-rule); border-radius: 0; color: var(--console-muted); background: transparent; font: 500 .74rem/1 var(--sans); letter-spacing: .02em; padding: .7rem .95rem; white-space: nowrap; }
.live .tabs button[aria-selected="true"] { color: var(--console-ink); background: var(--console-2); box-shadow: inset 0 -2px 0 var(--syn-op); }
.live-meta { margin-top: .6rem; font-size: .8rem; color: var(--muted); display: flex; gap: .8rem; flex-wrap: wrap; }

/* ---- document layout ------------------------------------------------------ */
main.doc {
  max-width: 78rem; margin: 0 auto; padding: 1rem clamp(1rem, 4vw, 2.4rem) 5rem;
  display: grid; grid-template-columns: 14.5rem minmax(0, 46rem); column-gap: clamp(2rem, 5vw, 4.5rem);
}
main.doc > * { grid-column: 2; min-width: 0; }
main.doc > #TOC {
  grid-column: 1; grid-row: 1 / span 9999; align-self: start;
  position: sticky; top: calc(var(--bar-h) + 1.5rem);
  max-height: calc(100vh - var(--bar-h) - 3rem); overflow: auto;
  font-size: .84rem; padding-top: 1.6rem; scrollbar-width: thin;
}
#TOC ul { list-style: none; margin: 0; padding: 0; }
#TOC li { margin: 0; }
#TOC ul ul { padding-left: .8rem; border-left: 1px solid var(--rule); margin: .15rem 0 .4rem .1rem; }
#TOC a { display: block; padding: .22rem 0; color: var(--muted); text-decoration: none; line-height: 1.35; }
#TOC a:hover, #TOC a.on { color: var(--ink); }
#TOC a.on { box-shadow: inset 2px 0 0 var(--accent); padding-left: .6rem; margin-left: -.6rem; }
@media (max-width: 960px) { main.doc { grid-template-columns: minmax(0, 1fr); } main.doc > #TOC { display: none; } main.doc > * { grid-column: 1; } }
main.doc.index > h1:first-of-type { display: none; }

/* ---- article typography --------------------------------------------------- */
.doc h1, .doc h2 { font-family: var(--serif); font-weight: 500; color: var(--ink); letter-spacing: -.01em; }
.doc h1 { font-size: 2.6rem; line-height: 1.1; margin: 2rem 0 1rem; }
.doc h2 { font-size: 1.85rem; line-height: 1.2; margin: 3.4rem 0 .9rem; padding-top: 1.6rem; border-top: 1px solid var(--rule); scroll-margin-top: calc(var(--bar-h) + 1rem); }
.doc h3 { font: 600 1.06rem/1.35 var(--sans); color: var(--ink); margin: 2.2rem 0 .5rem; scroll-margin-top: calc(var(--bar-h) + 1rem); }
.doc h4 { font: 600 .95rem/1.4 var(--sans); color: var(--ink); margin: 1.6rem 0 .4rem; }
.doc p, .doc li { color: var(--ink-2); }
.doc strong { color: var(--ink); font-weight: 600; }
.doc ul, .doc ol { padding-left: 1.3rem; }
.doc li { margin: .3rem 0; }
.doc li::marker { color: var(--muted); }
.doc hr { border: 0; border-top: 1px solid var(--rule); margin: 2.6rem 0; }
.doc blockquote { margin: 1.4rem 0; padding: .1rem 0 .1rem 1.2rem; border-left: 2px solid var(--accent); color: var(--ink-2); font-family: var(--serif); font-size: 1.12rem; }
.doc img { max-width: 100%; height: auto; border-radius: var(--r); border: 1px solid var(--rule); display: block; margin: 1.6rem 0; }

.doc code { font: 500 .86em/1.4 var(--mono); color: var(--ink); background: var(--paper-2); border: 1px solid var(--rule); border-radius: 4px; padding: .08em .32em; }
.doc pre { background: var(--console); color: var(--console-ink); border: 1px solid var(--console-rule); border-radius: var(--r); padding: 1rem 1.15rem; overflow: auto; font: 400 .84rem/1.62 var(--mono); margin: 1.2rem 0 1.4rem; scrollbar-width: thin; }
.doc pre code { background: none; border: 0; padding: 0; color: inherit; font: inherit; }
.doc pre code .co, .doc pre .co { color: var(--console-muted); font-style: italic; }
.doc pre .st { color: var(--syn-str); } .doc pre .kw, .doc pre .op { color: var(--syn-op); } .doc pre .dv, .doc pre .fl { color: var(--syn-num); } .doc pre .va, .doc pre .fu { color: var(--syn-bind); }

.doc table { width: 100%; border-collapse: collapse; margin: 1.4rem 0 1.8rem; font-size: .9rem; display: block; overflow-x: auto; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: .55rem .9rem .55rem 0; border-bottom: 1px solid var(--rule); }
.doc th { font: 600 .74rem/1.3 var(--sans); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); border-bottom-color: var(--rule-strong); }
.doc td:first-child code { white-space: nowrap; }

/* ---- showcase gallery ----------------------------------------------------- */
main.wide { max-width: 78rem; margin: 0 auto; padding: 2.5rem clamp(1rem, 4vw, 2.4rem) 5rem; }
main.wide h1 { font: 500 2.6rem/1.1 var(--serif); color: var(--ink); margin: 0 0 .6rem; letter-spacing: -.01em; }
main.wide h2 { font: 500 1.6rem/1.2 var(--serif); color: var(--ink); margin: 3rem 0 1rem; padding-top: 1.4rem; border-top: 1px solid var(--rule); }
main.wide .lead { color: var(--ink-2); max-width: 44rem; margin: 0 0 1.5rem; }
main.wide p > a > img { width: 100%; border-radius: var(--r); border: 1px solid var(--rule); display: block; }
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 1.8rem 1.4rem; margin: 1.2rem 0; }
.gallery figure { margin: 0; }
.gallery a { display: block; border-radius: var(--r); overflow: hidden; border: 1px solid var(--rule); transition: border-color .15s, transform .15s; }
.gallery a:hover { border-color: var(--rule-strong); transform: translateY(-2px); }
.gallery img { width: 100%; display: block; }
.gallery figcaption { font: 500 .8rem/1.4 var(--mono); color: var(--muted); margin-top: .55rem; }

/* The page title (README/SPEC H1) is not a destination: hide it in the TOC and
   flatten its sections to the top level. */
#TOC > ul > li > a:first-child:not(:only-child) { display: none; }
#TOC > ul > li > ul { border-left: 0; padding-left: 0; margin: 0; }
/* A markdown `---` right before a section heading would double the h2 rule. */
.doc hr:has(+ h2) { display: none; }