/* ==========================================================
   Sub-pages (About / Docs) — builds on style.css + style-sections.css
   ========================================================== */

/* ---------- Page hero ---------- */
.page-hero { position: relative; padding: 84px 0 56px; text-align: center; }
.page-hero h1 { font-size: clamp(34px, 5vw, 58px); line-height: 1.12; letter-spacing: -.025em; margin: 18px auto 18px; max-width: 880px; text-wrap: balance; }
.page-hero p.lead { color: var(--muted); font-size: clamp(16px, 1.8vw, 19px); max-width: 720px; margin: 0 auto; }
.page-hero .hero-cta { margin-top: 32px; }
.crumbs { font-family: var(--mono); font-size: 13px; color: var(--muted); letter-spacing: .04em; }
.crumbs a:hover { color: var(--ink); }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.about-grid.three { grid-template-columns: repeat(3, 1fr); }
.about-grid .card { padding: 32px; }
.prose { max-width: 760px; margin: 0 auto; }
.prose p { color: #c3c8da; font-size: 17px; line-height: 1.85; }
.prose p + p { margin-top: 18px; }
.prose strong { color: var(--ink); }

.company { display: grid; grid-template-columns: 1.15fr 1fr; gap: 28px; align-items: stretch; }
.company-card { border: 1px solid transparent; border-radius: 22px; padding: 38px 36px; background: linear-gradient(var(--bg2), var(--bg2)) padding-box, var(--grad) border-box; box-shadow: 0 30px 80px rgba(109,92,255,.18); }
.company-card .label { font-family: var(--mono); font-size: 12px; color: var(--accent2); letter-spacing: .12em; text-transform: uppercase; }
.company-card h3 { font-size: 26px; line-height: 1.3; margin: 10px 0 4px; }
.company-card .en-name { color: var(--muted); font-size: 17px; }
.company-card dl { margin-top: 26px; display: grid; gap: 14px; }
.company-card dl div { display: flex; gap: 16px; padding-top: 14px; border-top: 1px solid var(--rule); font-size: 14.5px; }
.company-card dt { flex: none; width: 92px; color: var(--muted); }
.company-card dd { color: var(--ink); min-width: 0; overflow-wrap: anywhere; }
.company-card dd a { color: var(--accent2); }
.company-card dd a:hover { text-decoration: underline; }
.company-text p { color: #c3c8da; font-size: 16.5px; line-height: 1.85; }
.company-text p + p { margin-top: 16px; }
.company-text strong { color: var(--ink); }

.brand-word { display: flex; flex-wrap: wrap; gap: 10px; margin: 6px 0 22px; }
.brand-word span { display: inline-flex; align-items: baseline; gap: 8px; padding: 8px 14px; border-radius: 12px; border: 1px solid var(--rule); background: var(--bg2); font-size: 15px; color: var(--muted); }
.brand-word b { font-family: var(--mono); font-size: 22px; line-height: 1; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* Model-access diagram (about + docs) */
.diagram { display: grid; grid-template-columns: 1fr 64px 1.1fr 64px 1fr; align-items: center; gap: 0; margin: 8px auto 0; max-width: 980px; }
.dg-col { display: grid; gap: 12px; }
.dg-box { padding: 14px 16px; border-radius: 14px; border: 1px solid var(--rule); background: var(--bg2); text-align: center; font-size: 14px; color: var(--muted); }
.dg-box b { display: block; color: var(--ink); font-size: 15px; margin-bottom: 2px; }
.dg-core { padding: 26px 18px; border-radius: 18px; border: 1px solid transparent; text-align: center; background: linear-gradient(var(--bg2), var(--bg2)) padding-box, var(--grad) border-box; box-shadow: 0 20px 60px rgba(109,92,255,.22); }
.dg-core img { width: 44px; height: 44px; margin: 0 auto 10px; filter: drop-shadow(0 0 14px rgba(109,92,255,.5)); }
.dg-core b { display: block; font-size: 18px; }
.dg-core span { display: block; margin-top: 6px; font-size: 13px; color: var(--muted); line-height: 1.5; }
.dg-arrow { position: relative; height: 2px; margin: 0 8px; background: linear-gradient(90deg, var(--accent), var(--accent2)); opacity: .8; }
.dg-arrow::after { content: ''; position: absolute; right: -1px; top: -4px; border: 5px solid transparent; border-left: 8px solid var(--accent2); }
.dg-arrow.both::before { content: ''; position: absolute; left: -1px; top: -4px; border: 5px solid transparent; border-right: 8px solid var(--accent); }
.dg-cap { margin-top: 10px; text-align: center; font-size: 12px; color: var(--muted); font-family: var(--mono); letter-spacing: .06em; }

.cta-band { border-radius: 26px; padding: 56px 32px; text-align: center; border: 1px solid rgba(255,255,255,.09);
  background: radial-gradient(700px 300px at 50% -10%, rgba(79,110,255,.14), transparent 70%), linear-gradient(180deg, #0f1222 0%, #0b0d18 100%); }
.cta-band h2 { font-size: clamp(26px, 3.6vw, 40px); letter-spacing: -.02em; line-height: 1.2; }
.cta-band p { color: var(--muted); margin: 12px auto 28px; max-width: 560px; font-size: 17px; }
.cta-band .hero-cta { gap: 12px; }

/* ---------- Docs layout ---------- */
.docs-wrap { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 56px; align-items: start; padding-bottom: 80px; }
.doc-side { position: sticky; top: 88px; max-height: calc(100vh - 108px); overflow-y: auto; padding-right: 8px; scrollbar-width: thin; scrollbar-color: var(--rule) transparent; }
.doc-side summary { display: none; list-style: none; cursor: pointer; }
.doc-side summary::-webkit-details-marker { display: none; }
.doc-group { margin-bottom: 22px; }
.doc-group h5 { font-family: var(--mono); font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--accent2); margin: 0 0 8px 12px; font-weight: 400; }
.doc-group a { display: block; padding: 6px 12px; border-left: 2px solid var(--rule); font-size: 14.5px; color: var(--muted); line-height: 1.45; transition: color .15s, border-color .15s, background .15s; }
.doc-group a:hover { color: var(--ink); }
.doc-group a.sub { padding-left: 26px; font-size: 13.5px; }
.doc-group a.on { color: var(--ink); border-left-color: var(--accent2); background: linear-gradient(90deg, rgba(34,211,238,.09), transparent); }

.doc { min-width: 0; max-width: 820px; counter-reset: sec; }
.doc section { padding-bottom: 12px; margin-bottom: 44px; border-bottom: 1px solid var(--rule); }
.doc section:last-of-type { border-bottom: 0; }
.doc h2 { counter-increment: sec; font-size: clamp(26px, 3vw, 34px); letter-spacing: -.02em; line-height: 1.2; margin: 0 0 18px; scroll-margin-top: 92px; display: flex; align-items: baseline; gap: 14px; }
.doc h2::before { content: counter(sec, decimal-leading-zero); font-family: var(--mono); font-size: .5em; color: var(--accent2); letter-spacing: .06em; font-weight: 400; transform: translateY(-.15em); }
.doc h3 { font-size: 20px; margin: 34px 0 10px; letter-spacing: -.01em; scroll-margin-top: 92px; }
.doc h4 { font-size: 16px; margin: 22px 0 8px; color: var(--ink); }
.doc p { color: #c3c8da; font-size: 16px; line-height: 1.8; margin: 0 0 14px; }
.doc ul, .doc ol { margin: 0 0 16px 4px; padding-left: 20px; color: #c3c8da; font-size: 16px; line-height: 1.75; }
.doc li { margin-bottom: 6px; padding-left: 4px; }
.doc li::marker { color: var(--accent2); }
.doc strong, .doc b { color: var(--ink); font-weight: 700; }
.doc a:not(.btn) { color: var(--accent2); text-decoration: underline; text-decoration-color: rgba(34,211,238,.35); text-underline-offset: 3px; }
.doc a:not(.btn):hover { text-decoration-color: var(--accent2); }
.doc code { font-family: var(--mono); font-size: .88em; padding: 2px 7px; border-radius: 6px; background: var(--bg3); border: 1px solid var(--rule); color: #d6dbf0; overflow-wrap: anywhere; }
.doc kbd { font-family: var(--mono); font-size: .82em; padding: 1px 7px; border-radius: 6px; background: var(--bg3); border: 1px solid var(--rule); border-bottom-width: 2px; color: var(--ink); }

.doc pre { position: relative; margin: 14px 0 20px; padding: 16px 18px; border-radius: 12px; border: 1px solid var(--rule); background: #0b0d14; overflow-x: auto; font-family: var(--mono); font-size: 13.5px; line-height: 1.75; color: #c9d1e8; tab-size: 2; }
.doc pre code { padding: 0; border: 0; background: none; font-size: inherit; color: inherit; overflow-wrap: normal; }
.doc pre[data-lang]::before { content: attr(data-lang); position: absolute; top: 8px; left: 14px; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: #5c6582; }
.doc pre[data-lang] { padding-top: 34px; }
.doc pre .c { color: #5c6582; } .doc pre .k { color: #c792ea; } .doc pre .s { color: #8bd5a0; } .doc pre .f { color: var(--accent2); }
.copy-code { position: absolute; top: 6px; right: 8px; padding: 4px 11px; border-radius: 8px; border: 1px solid var(--rule); background: rgba(255,255,255,.05); color: var(--muted); font: inherit; font-family: var(--font); font-size: 12px; cursor: pointer; opacity: 0; transition: opacity .15s, background .15s, color .15s; }
.doc pre:hover .copy-code, .copy-code:focus-visible { opacity: 1; }
.copy-code:hover { background: rgba(255,255,255,.1); color: var(--ink); }
.copy-code.done { opacity: 1; color: var(--accent2); border-color: rgba(34,211,238,.4); }
@media (hover: none) { .copy-code { opacity: 1; } }

.table-wrap { overflow-x: auto; margin: 14px 0 22px; border: 1px solid var(--rule); border-radius: 12px; background: var(--bg2); }
.doc table { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 520px; }
.doc th { text-align: left; padding: 11px 16px; background: var(--bg3); color: var(--ink); font-weight: 600; font-size: 13px; letter-spacing: .02em; white-space: nowrap; }
.doc td { padding: 11px 16px; border-top: 1px solid var(--rule); color: #c3c8da; vertical-align: top; line-height: 1.6; }
.doc td:first-child { color: var(--ink); white-space: nowrap; }
.doc td code { white-space: nowrap; }

.callout { margin: 18px 0 22px; padding: 14px 18px 14px 50px; border-radius: 12px; border: 1px solid var(--rule); background: var(--bg2); position: relative; font-size: 15px; line-height: 1.7; color: #c3c8da; }
.callout::before { content: 'i'; position: absolute; left: 16px; top: 15px; width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; font-family: var(--mono); font-size: 13px; font-weight: 700; color: var(--accent2); background: rgba(34,211,238,.14); }
.callout p { margin: 0; font-size: inherit; line-height: inherit; }
.callout p + p { margin-top: 8px; }
.callout.tip { border-color: rgba(34,211,238,.28); }
.callout.warn { border-color: rgba(251,191,36,.35); background: rgba(251,191,36,.05); }
.callout.warn::before { content: '!'; color: #fbbf24; background: rgba(251,191,36,.16); }
.callout.danger { border-color: rgba(248,113,113,.38); background: rgba(248,113,113,.05); }
.callout.danger::before { content: '!'; color: #f87171; background: rgba(248,113,113,.16); }

.doc-steps { list-style: none; margin: 18px 0 22px; padding: 0; counter-reset: ds; display: grid; gap: 14px; }
.doc-steps > li { counter-increment: ds; position: relative; padding: 18px 20px 18px 66px; margin: 0; border: 1px solid var(--rule); border-radius: 14px; background: var(--bg2); }
.doc-steps > li::before { content: counter(ds); position: absolute; left: 20px; top: 17px; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; font-family: var(--mono); font-size: 14px; font-weight: 700; color: #fff; background: var(--grad); }
.doc-steps > li > b:first-child { display: block; font-size: 16.5px; margin-bottom: 4px; }
.doc-steps p, .doc-steps ul { margin-bottom: 8px; font-size: 15px; }
.doc-steps > li > :last-child { margin-bottom: 0; }

.doc-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 18px 0 22px; }
.doc-cards a, .doc-cards div { display: block; padding: 18px 18px 16px; border: 1px solid var(--rule); border-radius: 14px; background: var(--bg2); text-decoration: none !important; transition: border-color .2s, transform .2s; }
.doc-cards a:hover { border-color: rgba(109,92,255,.55); transform: translateY(-2px); }
.doc-cards b { display: block; color: var(--ink); font-size: 15.5px; margin-bottom: 4px; }
.doc-cards span { display: block; color: var(--muted); font-size: 13.5px; line-height: 1.6; }

.field-list { display: grid; gap: 0; margin: 14px 0 22px; border: 1px solid var(--rule); border-radius: 12px; background: var(--bg2); overflow: hidden; }
.field-list > div { display: grid; grid-template-columns: 170px 1fr; gap: 16px; padding: 14px 18px; border-top: 1px solid var(--rule); font-size: 15px; line-height: 1.65; }
.field-list > div:first-child { border-top: 0; }
.field-list dt { color: var(--ink); font-weight: 600; }
.field-list dt small { display: block; margin-top: 2px; color: var(--muted); font-weight: 400; font-size: 12px; font-family: var(--mono); }
.field-list dd { color: #c3c8da; margin: 0; min-width: 0; }

.doc-foot { margin-top: 10px; padding: 26px 28px; border-radius: 18px; border: 1px solid transparent; background: linear-gradient(var(--bg2), var(--bg2)) padding-box, var(--grad) border-box; display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; }
.doc-foot b { display: block; font-size: 18px; margin-bottom: 2px; }
.doc-foot span { color: var(--muted); font-size: 14.5px; }
.doc-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 22px; font-family: var(--mono); font-size: 12.5px; color: var(--muted); justify-content: center; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .about-grid.three { grid-template-columns: 1fr 1fr; }
  .company { grid-template-columns: 1fr; }
  .docs-wrap { grid-template-columns: 1fr; gap: 24px; }
  .doc-side { position: static; max-height: none; overflow: visible; padding: 0; border: 1px solid var(--rule); border-radius: 14px; background: var(--bg2); }
  .doc-side summary { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; font-weight: 600; font-size: 15px; }
  .doc-side summary::after { content: '+'; font-size: 22px; line-height: 1; color: var(--accent2); transition: transform .25s; }
  .doc-side[open] summary::after { transform: rotate(45deg); }
  .doc-side .doc-body { padding: 4px 12px 14px; max-height: 60vh; overflow-y: auto; }
  .doc-cards { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .diagram { grid-template-columns: 1fr; gap: 10px; }
  .dg-arrow { width: 2px; height: 28px; margin: 0 auto; background: linear-gradient(180deg, var(--accent), var(--accent2)); }
  .dg-arrow::after { right: auto; left: -4px; top: auto; bottom: -1px; border: 5px solid transparent; border-top: 8px solid var(--accent2); border-left-color: transparent; }
  .dg-arrow.both::before { right: auto; left: -4px; top: -1px; border: 5px solid transparent; border-bottom: 8px solid var(--accent); border-right-color: transparent; }
}
@media (max-width: 640px) {
  .page-hero { padding: 56px 0 36px; }
  .about-grid, .about-grid.three { grid-template-columns: 1fr; }
  .doc-cards { grid-template-columns: 1fr; }
  .field-list > div { grid-template-columns: 1fr; gap: 4px; }
  .doc-steps > li { padding: 16px 16px 16px 58px; }
  .doc-steps > li::before { left: 15px; }
  .company-card { padding: 28px 22px; }
  .company-card dl div { flex-direction: column; gap: 2px; }
  .doc-foot { padding: 22px; }
}