/* ============================================================
   BLUEPRINT CONSOLE — USER MANUAL
   DWG NO DL-MA-2900 · REV C · MANUAL SHEETSET
   ============================================================ */

:root{
  --bg:#0B2330; --panel:#0F2D3D; --panel-2:#123549;
  --ink:#EAF6FB; --sec:#CFE6EE; --cyan:#5BD0EE; --cyan-dim:rgba(91,208,238,.55);
  --amber:#FFC24B; --amber-dim:rgba(255,194,75,.16);
  --hair:rgba(207,230,238,.18); --hair-soft:rgba(207,230,238,.09);
  --good:#6FE3B2;
  --disp:"Saira",sans-serif; --body:"Inter",sans-serif; --mono:"Spline Sans Mono",monospace;
}
*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; scrollbar-color:var(--cyan-dim) var(--bg); }
body{
  font-family:var(--body); color:var(--ink); font-size:15.5px; line-height:1.68;
  overflow-x:hidden;
  background:
    repeating-linear-gradient(0deg,  rgba(91,208,238,.05) 0 1px, transparent 1px 120px),
    repeating-linear-gradient(90deg, rgba(91,208,238,.05) 0 1px, transparent 1px 120px),
    repeating-linear-gradient(0deg,  rgba(91,208,238,.022) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(90deg, rgba(91,208,238,.022) 0 1px, transparent 1px 24px),
    var(--bg);
}
a{ color:var(--cyan); text-decoration:none; }
a:hover{ text-decoration:underline; }
:focus-visible{ outline:2px solid var(--cyan); outline-offset:2px; border-radius:2px; }

/* ---- masthead ---- */
.mast{
  border-bottom:1px solid var(--hair);
  background:linear-gradient(180deg, var(--panel) 0%, rgba(11,35,48,.6) 100%);
  padding:22px 26px;
  position:sticky; top:0; z-index:50; backdrop-filter:blur(6px);
  display:flex; align-items:center; gap:16px; flex-wrap:wrap;
}
.mast .m-mark{ flex-shrink:0; }
.mast .m-txt{ display:flex; flex-direction:column; line-height:1.1; }
.mast .m-title{ font-family:var(--disp); font-weight:700; font-size:19px; letter-spacing:.02em; }
.mast .m-sub{ font-family:var(--mono); font-size:9.5px; letter-spacing:.22em; color:var(--cyan); margin-top:4px; }
.mast .m-actions{ margin-left:auto; display:flex; gap:10px; align-items:center; flex-wrap:wrap; }
.dwg-tag{ font-family:var(--mono); font-size:9.5px; letter-spacing:.14em; color:rgba(91,208,238,.55); }
.btn{
  font-family:var(--mono); font-size:11.5px; letter-spacing:.06em;
  border:1px solid var(--cyan-dim); color:var(--cyan); background:transparent;
  padding:8px 14px; border-radius:3px; white-space:nowrap;
}
.btn:hover{ background:rgba(91,208,238,.12); text-decoration:none; }
.btn.primary{ background:var(--cyan); color:#06202C; border-color:var(--cyan); font-weight:500; }
.btn.primary:hover{ background:#7cdcf4; }

/* ---- layout: sticky TOC + content ---- */
.wrap{ display:grid; grid-template-columns:262px minmax(0,1fr); gap:34px; max-width:1200px; margin:0 auto; padding:30px 26px 80px; }

.toc{ position:sticky; top:100px; align-self:start; max-height:calc(100vh - 130px); overflow-y:auto; padding-right:6px; }
.toc-cap{ font-family:var(--mono); font-size:9.5px; letter-spacing:.2em; color:rgba(207,230,238,.5); margin-bottom:12px; }
.toc ol{ list-style:none; counter-reset:toc; }
.toc li{ counter-increment:toc; }
.toc a{
  display:flex; gap:9px; align-items:baseline; color:var(--sec);
  font-family:var(--disp); font-weight:500; font-size:14px; letter-spacing:.01em;
  padding:6px 8px; border-left:2px solid transparent; border-radius:0 3px 3px 0;
}
.toc a::before{ content:"SH-" counter(toc,decimal-leading-zero); font-family:var(--mono); font-size:9px; color:var(--cyan-dim); flex-shrink:0; width:38px; }
.toc a:hover{ color:var(--ink); background:var(--hair-soft); text-decoration:none; }
.toc a.active{ color:var(--ink); border-left-color:var(--cyan); background:linear-gradient(90deg,rgba(91,208,238,.12),transparent 85%); }
.toc a.active::before{ color:var(--cyan); }

/* ---- content ---- */
.doc{ min-width:0; }
.lede{
  border:1px solid var(--hair); border-radius:3px; background:var(--panel);
  padding:24px 26px; margin-bottom:30px; position:relative;
}
.lede::before,.lede::after{ content:""; position:absolute; width:10px; height:10px; }
.lede::before{ top:-1px; left:-1px; border-top:2px solid var(--cyan); border-left:2px solid var(--cyan); }
.lede::after{ bottom:-1px; right:-1px; border-bottom:2px solid var(--cyan); border-right:2px solid var(--cyan); }
.lede h1{ font-family:var(--disp); font-weight:700; font-size:30px; line-height:1.12; letter-spacing:.01em; margin-bottom:10px; }
.lede p{ color:var(--sec); max-width:70ch; }
.lede .ey{ font-family:var(--mono); font-size:10px; letter-spacing:.2em; color:var(--cyan); margin-bottom:10px; }

section.sheet{ padding-top:26px; margin-top:26px; border-top:1px solid var(--hair-soft); scroll-margin-top:96px; }
.sheet-head{ display:flex; align-items:baseline; gap:12px; margin-bottom:6px; flex-wrap:wrap; }
.sheet-no{ font-family:var(--mono); font-size:10px; letter-spacing:.16em; color:var(--cyan); border:1px solid var(--hair); padding:3px 8px; border-radius:2px; white-space:nowrap; }
.sheet h2{ font-family:var(--disp); font-weight:700; font-size:24px; letter-spacing:.01em; }
.sheet h3{ font-family:var(--disp); font-weight:600; font-size:17px; margin:22px 0 8px; letter-spacing:.01em; color:var(--ink); }
.sheet h4{ font-family:var(--disp); font-weight:600; font-size:14.5px; margin:16px 0 4px; color:var(--cyan); }
.sheet p{ color:var(--sec); margin:10px 0; max-width:74ch; }
.sheet ul,.sheet ol{ color:var(--sec); margin:10px 0 10px 4px; padding-left:22px; max-width:74ch; }
.sheet li{ margin:6px 0; }
.sheet strong{ color:var(--ink); font-weight:600; }
.sheet em{ color:var(--ink); font-style:italic; }
code{ font-family:var(--mono); font-size:.86em; background:rgba(11,35,48,.8); border:1px solid var(--hair-soft); padding:1px 6px; border-radius:3px; color:var(--cyan); }

/* callouts */
.note{ border-left:3px solid var(--cyan); background:rgba(91,208,238,.07); padding:12px 16px; border-radius:0 3px 3px 0; margin:16px 0; font-size:14px; color:var(--sec); }
.note.gate{ border-left-color:var(--amber); background:var(--amber-dim); }
.note .tag{ font-family:var(--mono); font-size:9.5px; letter-spacing:.16em; color:var(--cyan); display:block; margin-bottom:4px; }
.note.gate .tag{ color:var(--amber); }

/* step list */
.steps{ list-style:none; counter-reset:step; padding-left:0; margin:16px 0; }
.steps li{ counter-increment:step; position:relative; padding:12px 0 12px 46px; border-bottom:1px dashed var(--hair-soft); }
.steps li:last-child{ border-bottom:none; }
.steps li::before{
  content:counter(step); position:absolute; left:0; top:12px;
  font-family:var(--mono); font-size:13px; color:#06202C; background:var(--cyan);
  width:28px; height:28px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-weight:500;
}
.steps li strong{ display:block; font-family:var(--disp); font-size:15px; color:var(--ink); margin-bottom:2px; }

/* spec table */
.spec-table{ width:100%; border-collapse:collapse; margin:16px 0; border:1px solid var(--hair); border-radius:3px; overflow:hidden; display:table; }
.tbl-wrap{ overflow-x:auto; border:1px solid var(--hair); border-radius:3px; margin:16px 0; }
.tbl-wrap table{ width:100%; border-collapse:collapse; min-width:520px; }
.tbl-wrap th{ font-family:var(--mono); font-size:9.5px; letter-spacing:.14em; color:var(--cyan); text-align:left; padding:10px 14px; background:rgba(11,35,48,.6); border-bottom:1px solid var(--hair); white-space:nowrap; }
.tbl-wrap td{ padding:11px 14px; border-bottom:1px solid var(--hair-soft); font-size:13.5px; color:var(--sec); vertical-align:top; }
.tbl-wrap tr:last-child td{ border-bottom:none; }
.tbl-wrap td strong{ color:var(--ink); }
.tbl-wrap td .mono{ font-family:var(--mono); font-size:11px; color:var(--cyan); }

/* subsystem cards */
.mod{ border:1px solid var(--hair); border-radius:3px; background:var(--panel); padding:18px 20px; margin:14px 0; }
.mod .mod-top{ display:flex; align-items:baseline; gap:10px; margin-bottom:2px; }
.mod .mod-no{ font-family:var(--mono); font-size:10px; letter-spacing:.14em; color:var(--cyan); }
.mod h3{ margin:0; }
.mod .mod-role{ font-family:var(--mono); font-size:10px; letter-spacing:.1em; color:var(--sec); }
.kv{ font-family:var(--mono); font-size:12px; color:var(--sec); margin:6px 0; }
.kv b{ color:var(--cyan); font-weight:500; }

/* glossary */
.gloss dt{ font-family:var(--disp); font-weight:600; font-size:15px; color:var(--ink); margin-top:14px; }
.gloss dd{ color:var(--sec); font-size:14px; margin:3px 0 0; padding-left:0; }

/* faq */
details.faq{ border:1px solid var(--hair); border-radius:3px; background:var(--panel); margin:10px 0; padding:0 16px; }
details.faq summary{ cursor:pointer; padding:14px 0; font-family:var(--disp); font-weight:600; font-size:15.5px; list-style:none; display:flex; gap:12px; align-items:center; }
details.faq summary::-webkit-details-marker{ display:none; }
details.faq summary::before{ content:"+"; font-family:var(--mono); color:var(--cyan); font-size:18px; width:16px; flex-shrink:0; }
details.faq[open] summary::before{ content:"–"; }
details.faq[open] summary{ color:var(--cyan); }
details.faq .faq-body{ padding:0 0 16px 28px; color:var(--sec); font-size:14px; }
details.faq .faq-body p{ margin:8px 0; }

.foot{ border-top:1px solid var(--hair); padding:22px 26px; text-align:center; color:rgba(207,230,238,.55); font-size:12.5px; display:flex; gap:14px; justify-content:center; align-items:center; flex-wrap:wrap; }
.foot .mono{ font-family:var(--mono); font-size:10px; letter-spacing:.14em; color:rgba(91,208,238,.5); }

@media (max-width:920px){
  .wrap{ grid-template-columns:1fr; gap:0; }
  .toc{
    position:static; max-height:none; overflow:visible; margin-bottom:22px;
    border:1px solid var(--hair); border-radius:3px; background:var(--panel); padding:14px;
  }
  .toc ol{ columns:2; column-gap:14px; }
}
@media (max-width:560px){
  .mast{ padding:16px; }
  .wrap{ padding:20px 16px 60px; }
  .lede{ padding:18px; }
  .lede h1{ font-size:23px; }
  .sheet h2{ font-size:20px; }
  .toc ol{ columns:1; }
}
@media (prefers-reduced-motion:reduce){ html{ scroll-behavior:auto; } *{ transition:none!important; } }