/* =====================================================================
   Technical docs (blueprint). Loaded only on doc templates.
   Mono labels, hairline rules, grid paper. Gold only on the active TOC tick.
   ================================================================== */

/* ---------- hero ---------- */
.dt-hero{position:relative; padding:clamp(48px,6vw,84px) 0 40px; border-bottom:1px solid var(--line); overflow:hidden;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px),linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:120px 120px,120px 120px,24px 24px,24px 24px; background-position:-1px -1px;}
.dt-hero::after{content:""; position:absolute; inset:0; background:radial-gradient(ellipse at 30% 0%,transparent 0%,var(--bg) 78%); pointer-events:none;}
.dt-hero .wrap{position:relative; z-index:1;}
.dt-crumbs{display:flex; align-items:center; gap:8px; font-family:var(--mono); font-size:0.72rem; letter-spacing:.08em; text-transform:uppercase; color:var(--dim); margin-bottom:26px;}
.dt-crumbs a{color:var(--muted); text-decoration:none;}
.dt-crumbs a:hover{color:#fff;}
.dt-crumbs i{font-style:normal; opacity:.5;}
.dt-hero h1{max-width:14ch;}
.dt-hero__lede{max-width:640px; margin-top:18px; color:var(--muted); font-size:1.05rem;}
.dt-spec{display:grid; grid-template-columns:repeat(5,minmax(0,1fr)); margin:40px 0 0; border:1px solid var(--line-2); border-radius:var(--r-sm); background:rgba(0,0,0,.6); -webkit-backdrop-filter:blur(6px); backdrop-filter:blur(6px);}
.dt-spec > div{padding:14px 18px; border-right:1px solid var(--line-2);}
.dt-spec > div:last-child{border-right:0;}
.dt-spec dt{font-family:var(--mono); font-size:0.6rem; letter-spacing:.14em; text-transform:uppercase; color:var(--dim); margin-bottom:4px;}
.dt-spec dd{margin:0; font-family:var(--mono); font-size:0.82rem; color:var(--text); white-space:nowrap; overflow:hidden; text-overflow:ellipsis;}

/* ---------- layout ---------- */
.dt-layout{display:grid; grid-template-columns:250px minmax(0,1fr); gap:56px; padding-top:48px; padding-bottom:var(--section-pad);}
.dt-toc{position:relative;}
.dt-toc__box{position:sticky; top:96px; max-height:calc(100vh - 120px); overflow:auto; scrollbar-width:thin;}
.dt-toc__box > summary{list-style:none; cursor:default; display:flex; justify-content:space-between; align-items:baseline; padding-bottom:12px; margin-bottom:8px; border-bottom:1px solid var(--line); font-family:var(--mono); font-size:0.68rem; letter-spacing:.14em; text-transform:uppercase; color:var(--muted);}
.dt-toc__box > summary::-webkit-details-marker{display:none;}
.dt-toc__box > summary span{color:var(--dim); letter-spacing:.06em;}
.dt-toc ol{list-style:none; margin:0; padding:0;}
.dt-toc a{position:relative; display:flex; gap:12px; padding:6px 0 6px 14px; font-size:0.84rem; line-height:1.4; color:var(--dim); text-decoration:none; border-left:1px solid var(--line); transition:color .2s,border-color .2s;}
.dt-toc a span{font-family:var(--mono); font-size:0.7rem; color:var(--dim); padding-top:1px; min-width:18px;}
.dt-toc a:hover{color:#fff;}
.dt-toc a.is-active{color:#fff; border-left-color:#fff;}
.dt-toc a.is-active::before{content:""; position:absolute; left:-3px; top:50%; width:5px; height:5px; margin-top:-2.5px; border-radius:50%; background:var(--gold);}

/* ---------- sections ---------- */
.dt-body{min-width:0; max-width:860px;}
.dt-sec{padding:0 0 56px; margin-bottom:56px; border-bottom:1px dashed var(--line-2); scroll-margin-top:96px;}
.dt-sec:last-child{border-bottom:0; margin-bottom:0;}
.dt-sec__head{position:relative; display:flex; align-items:baseline; gap:16px; margin-bottom:22px;}
.dt-sec__num{flex:none; font-family:var(--mono); font-size:0.74rem; letter-spacing:.08em; color:var(--dim); padding:3px 8px; border:1px solid var(--line-2); border-radius:6px; transform:translateY(-5px);}
.dt-sec__head h2{font-size:clamp(1.45rem,2.4vw,1.9rem);}
.dt-sec__anchor{margin-left:auto; font-family:var(--mono); color:var(--dim); text-decoration:none; opacity:0; transition:opacity .2s;}
.dt-sec__head:hover .dt-sec__anchor{opacity:1;}
.dt-sec p{color:var(--soft); font-size:0.95rem; margin-bottom:14px;}
.dt-sec p a,.dt-list a,.dt-table a{color:#fff; text-underline-offset:3px; text-decoration-color:var(--line-2);}
.dt-sec p a:hover,.dt-list a:hover,.dt-table a:hover{text-decoration-color:#fff;}
.dt-h3{font-size:0.95rem; margin:30px 0 12px; font-family:var(--mono); font-weight:500; font-size:0.72rem; letter-spacing:.14em; text-transform:uppercase; color:var(--muted);}
.dt-small{font-size:0.84rem !important; color:var(--muted) !important;}
.dt-sec code,.dt-table code{font-family:var(--mono); font-size:0.8em; padding:1px 6px; border:1px solid var(--line-2); border-radius:5px; background:var(--card-2); color:var(--soft); white-space:nowrap;}
.dt-mono{font-family:var(--mono); font-size:0.78rem !important; color:var(--soft) !important;}

/* admin path chip */
.dt-path{display:inline-flex; flex-wrap:wrap; align-items:center; gap:2px 6px; padding:1px 8px; border:1px solid var(--line-2); border-radius:6px; background:var(--card); font-family:var(--mono); font-size:0.74rem; color:var(--text); line-height:1.7; vertical-align:baseline;}
.dt-path i{font-style:normal; color:var(--dim);}
.dt-var{color:var(--muted); border-bottom:1px dotted var(--dim); cursor:help;}

/* tables */
.dt-table-wrap{margin:6px 0 16px; border:1px solid var(--line); border-radius:var(--r-sm); overflow-x:auto; background:var(--card);}
.dt-table{width:100%; border-collapse:collapse; font-size:0.86rem;}
.dt-table th{text-align:left; padding:11px 16px; font-family:var(--mono); font-size:0.62rem; font-weight:500; letter-spacing:.14em; text-transform:uppercase; color:var(--dim); border-bottom:1px solid var(--line-2); background:var(--bg-2); white-space:nowrap;}
.dt-table td{padding:12px 16px; vertical-align:top; color:var(--soft); border-bottom:1px solid var(--line); line-height:1.55;}
.dt-table tbody tr:last-child td{border-bottom:0;}
.dt-table td:first-child{color:var(--text); font-weight:500;}
.dt-table td[rowspan]{border-left:1px solid var(--line);}
.dt-table tbody tr:hover td{background:rgba(255,255,255,.015);}
.dt-table--kv th{width:150px; background:none; border-bottom:1px solid var(--line); border-right:1px solid var(--line); vertical-align:top; padding-top:14px;}
.dt-table--kv td:first-child{font-weight:400; color:var(--soft);}
.dt-table--check td:first-child{width:52px; font-family:var(--mono); font-size:0.72rem; color:var(--dim); font-weight:400;}
.dt-table--check td:nth-child(2){color:var(--text);}
.dt-req,.dt-opt{display:inline-block; font-family:var(--mono); font-size:0.6rem; letter-spacing:.12em; text-transform:uppercase; padding:2px 7px; border-radius:5px; border:1px solid var(--text); color:var(--text); white-space:nowrap;}
.dt-opt{border-color:var(--line-2); color:var(--muted);}

/* steps */
.dt-steps{counter-reset:dt; list-style:none; margin:4px 0 16px; padding:0;}
.dt-steps li{counter-increment:dt; position:relative; padding:0 0 18px 50px; color:var(--soft); font-size:0.93rem;}
.dt-steps li::before{content:counter(dt,decimal-leading-zero); position:absolute; left:0; top:0; width:32px; height:26px; display:grid; place-items:center; font-family:var(--mono); font-size:0.7rem; color:var(--text); border:1px solid var(--line-2); border-radius:6px; background:var(--card);}
.dt-steps li::after{content:""; position:absolute; left:16px; top:30px; bottom:4px; border-left:1px dashed var(--line-2);}
.dt-steps li:last-child::after{display:none;}
.dt-steps b{color:var(--text); font-weight:600;}

/* flow */
.dt-flow{list-style:none; margin:6px 0 18px; padding:0; display:grid; grid-template-columns:repeat(4,1fr); border:1px solid var(--line); border-radius:var(--r-sm); overflow:hidden; counter-reset:fl;}
.dt-flow--6{grid-template-columns:repeat(6,1fr);}
.dt-flow li{counter-increment:fl; position:relative; padding:16px 16px 18px; border-right:1px solid var(--line); background:var(--card); display:flex; flex-direction:column; gap:6px;}
.dt-flow li:last-child{border-right:0;}
.dt-flow li::before{content:counter(fl,decimal-leading-zero) " \2192"; font-family:var(--mono); font-size:0.62rem; letter-spacing:.1em; color:var(--dim);}
.dt-flow li:last-child::before{content:counter(fl,decimal-leading-zero);}
.dt-flow b{font-size:0.9rem; color:var(--text);}
.dt-flow span{font-size:0.8rem; color:var(--muted); line-height:1.5;}

/* cards & lists */
.dt-grid-2{display:grid; grid-template-columns:1fr 1fr; gap:14px; margin:6px 0 16px;}
.dt-card{border:1px solid var(--line); border-radius:var(--r-sm); padding:18px 20px; background:var(--card);}
.dt-card h3{font-family:var(--mono); font-weight:500; font-size:0.66rem; letter-spacing:.14em; text-transform:uppercase; color:var(--muted); padding-bottom:10px; margin-bottom:10px; border-bottom:1px solid var(--line);}
.dt-list{list-style:none; margin:0 0 14px; padding:0;}
.dt-card .dt-list{margin:0;}
.dt-list li{position:relative; padding:5px 0 5px 20px; font-size:0.88rem; color:var(--soft); line-height:1.55;}
.dt-list li::before{content:""; position:absolute; left:2px; top:14px; width:8px; border-top:1px solid var(--dim);}
.dt-list b{color:var(--text); font-weight:600;}
.dt-list--cols{columns:2; column-gap:28px;}
.dt-list--cols li{break-inside:avoid;}

/* notes */
.dt-note{margin:18px 0; padding:14px 18px 14px 20px; border:1px solid var(--line-2); border-left:2px solid #fff; border-radius:0 var(--r-sm) var(--r-sm) 0; background:var(--card);}
.dt-note b{display:block; margin-bottom:4px; font-family:var(--mono); font-weight:500; font-size:0.64rem; letter-spacing:.14em; text-transform:uppercase; color:var(--text);}
.dt-note b::before{content:"i  "; white-space:pre;}
.dt-note--warn{border-left-style:dashed;}
.dt-note--warn b::before{content:"!  ";}
.dt-note p{margin:0 !important; font-size:0.88rem !important;}

/* code */
.dt-code{margin:10px 0 16px; border:1px solid var(--line-2); border-radius:var(--r-sm); overflow:hidden; background:#050505;}
.dt-code__bar{display:flex; justify-content:space-between; align-items:center; padding:7px 10px 7px 14px; border-bottom:1px solid var(--line); font-family:var(--mono); font-size:0.62rem; letter-spacing:.12em; text-transform:uppercase; color:var(--dim);}
.dt-code__bar button{font:inherit; letter-spacing:.12em; color:var(--muted); background:none; border:1px solid var(--line-2); border-radius:5px; padding:3px 9px; cursor:pointer;}
.dt-code__bar button:hover{color:#fff; border-color:#fff;}
.dt-code pre{margin:0; padding:14px; overflow-x:auto;}
.dt-code code{font-family:var(--mono); font-size:0.8rem; color:var(--soft); border:0; background:none; padding:0; white-space:pre;}

/* figure */
.dt-fig{margin:22px 0; padding:20px; border:1px solid var(--line); border-radius:var(--r-sm); background:
  linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px) 0 0/20px 20px,linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px) 0 0/20px 20px,var(--bg-2);}
.dt-stack{display:block; width:100%; height:auto;}
.dt-draw rect{fill:rgba(0,0,0,.55); stroke:var(--line-2); stroke-width:1; stroke-dasharray:1600; stroke-dashoffset:1600; animation:dt-draw 1.6s var(--ease) forwards;}
.dt-draw rect:nth-child(2){animation-delay:.12s;} .dt-draw rect:nth-child(3){animation-delay:.24s;} .dt-draw rect:nth-child(4){animation-delay:.3s;}
.dt-draw rect:nth-child(5){animation-delay:.42s;} .dt-draw rect:nth-child(n+6){animation-delay:.6s;}
.dt-draw .dt-stack__core{stroke:#fff; fill:rgba(255,255,255,.04);}
.dt-draw .dt-dash{stroke-dasharray:4 4; stroke-dashoffset:0; animation:dt-fade .8s .7s both;}
.dt-stack__txt text{font-family:var(--mono); font-size:11px; letter-spacing:.12em; fill:var(--soft); animation:dt-fade .6s .5s both;}
.dt-stack__txt .dt-dim{fill:var(--dim); font-size:9.5px;}
.dt-stack__txt .dt-strong{fill:#fff; font-size:13px; font-weight:500;}
@keyframes dt-draw{to{stroke-dashoffset:0;}}
@keyframes dt-fade{from{opacity:0;}}
@media (prefers-reduced-motion:reduce){.dt-draw rect,.dt-stack__txt text{animation:none; stroke-dashoffset:0;}}
.dt-fig figcaption{margin-top:12px; font-size:0.8rem; color:var(--muted);}
.dt-fig figcaption span{font-family:var(--mono); font-size:0.64rem; letter-spacing:.12em; color:var(--text); margin-right:8px;}

/* support */
.dt-support{display:grid; grid-template-columns:repeat(3,1fr); border:1px solid var(--line); border-radius:var(--r-sm); overflow:hidden; margin-bottom:14px;}
.dt-support > div{padding:16px 18px; border-right:1px solid var(--line); background:var(--card); display:flex; flex-direction:column; gap:6px; font-size:0.88rem; color:var(--soft);}
.dt-support > div:last-child{border-right:0;}
.dt-support a{color:#fff;}
.dt-k{font-family:var(--mono); font-size:0.6rem; letter-spacing:.14em; text-transform:uppercase; color:var(--dim);}
.dt-chip{display:inline-block; margin:4px 6px 0 0; padding:3px 10px; border:1px solid var(--line-2); border-radius:999px; font-size:0.8rem; color:#fff; text-decoration:none;}
.dt-chip:hover{border-color:#fff;}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .dt-layout{grid-template-columns:1fr; gap:24px; padding-top:28px;}
  .dt-toc__box{position:static; max-height:none; border:1px solid var(--line); border-radius:var(--r-sm); padding:14px 16px; background:var(--card);}
  .dt-toc__box > summary{cursor:pointer; margin-bottom:0; padding-bottom:0; border-bottom:0;}
  .dt-toc__box[open] > summary{padding-bottom:12px; margin-bottom:8px; border-bottom:1px solid var(--line);}
  .dt-toc ol{columns:2; column-gap:20px;}
  .dt-toc li{break-inside:avoid;}
  .dt-spec{grid-template-columns:repeat(3,minmax(0,1fr));}
  .dt-spec > div:nth-child(3){border-right:0;}
  .dt-spec > div:nth-child(-n+3){border-bottom:1px solid var(--line-2);}
  .dt-flow--6{grid-template-columns:repeat(3,1fr);}
  .dt-flow--6 li:nth-child(3){border-right:0;}
  .dt-flow--6 li:nth-child(-n+3){border-bottom:1px solid var(--line);}
}
@media (max-width:640px){
  .dt-toc ol{columns:1;}
  .dt-spec{grid-template-columns:1fr 1fr;}
  .dt-spec > div{border-right:0 !important; border-bottom:1px solid var(--line-2);}
  .dt-spec > div:nth-child(odd){border-right:1px solid var(--line-2) !important;}
  .dt-spec > div:last-child{border-bottom:0; grid-column:1 / -1;}
  .dt-flow,.dt-flow--6{grid-template-columns:1fr 1fr;}
  .dt-flow li{border-right:0 !important; border-bottom:1px solid var(--line);}
  .dt-flow li:nth-child(odd){border-right:1px solid var(--line) !important;}
  .dt-grid-2,.dt-support{grid-template-columns:1fr;}
  .dt-support > div{border-right:0; border-bottom:1px solid var(--line);}
  .dt-support > div:last-child{border-bottom:0;}
  .dt-list--cols{columns:1;}
  .dt-sec__anchor{display:none;}
  .dt-table{font-size:0.82rem;}
  .dt-table th,.dt-table td{padding:10px 12px;}
  .dt-steps li{padding-left:44px;}
}