/* Blueprint pages: a curated, document-style write-up with a sticky section bar,
   left-rail notes and figure cards. Used on top of project.css. */
.bp{--bp-card:var(--surface);--bp-edge:var(--muted);--bp-tint:color-mix(in srgb,var(--accent) 11%,var(--surface));--bp-tint-line:color-mix(in srgb,var(--accent) 48%,transparent);--bp-bar:56px}
.bp-wrap{max-width:1240px;margin:0 auto;padding:0 28px}

/* sticky bar */
.bp-bar{position:sticky;top:0;z-index:40;background:color-mix(in srgb,var(--bg) 94%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.bp-bar .bp-wrap{display:flex;align-items:center;gap:26px;height:var(--bp-bar)}
.bp-doc{flex:none;display:flex;align-items:center;gap:9px;font-size:14px;color:var(--muted);white-space:nowrap}
.bp-doc b{color:var(--text);font-weight:600;letter-spacing:-.02em}
.bp-doc i{width:7px;height:7px;border-radius:50%;background:var(--accent);flex:none}
.bp-tabs{flex:1;min-width:0;display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;padding:0 16px;margin:0 -16px;-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 16px,#000 calc(100% - 16px),transparent 100%);mask-image:linear-gradient(90deg,transparent 0,#000 16px,#000 calc(100% - 16px),transparent 100%)}
.bp-tabs::-webkit-scrollbar{display:none}
.bp-tabs a{flex:none;font-size:13px;color:var(--muted);padding:8px 11px;border-radius:7px;position:relative;transition:color .15s,background-color .15s}
.bp-tabs a:hover{color:var(--text);background:var(--surface2)}
.bp-tabs a[aria-current="true"]{color:var(--text);font-weight:600}
.bp-tabs a[aria-current="true"]::after{content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;border-radius:2px;background:var(--accent)}

/* intro */
.bp-intro{padding:64px 0 46px;text-align:center}
.bp-eyebrow{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-ink);font-weight:500}
.bp-intro h1{font-size:clamp(2.1rem,5.4vw,3.6rem);font-weight:600;letter-spacing:-.04em;line-height:1.05;max-width:17ch;margin:16px auto 0;text-wrap:balance}
.bp-intro h1 em{font-style:normal;color:var(--accent-ink)}
.bp-sum{font-size:1.1rem;color:var(--muted);max-width:60ch;margin:20px auto 0;line-height:1.55}
.bp-deal{font-size:1.02rem;font-weight:600;margin:14px auto 0;max-width:60ch}
.bp-deal span{color:var(--accent-ink)}
.bp-flow{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:34px auto 0;max-width:920px;padding:0;list-style:none}
.bp-flow a{display:inline-flex;align-items:center;gap:8px;font-size:13px;padding:7px 13px;border:1px solid var(--border2);border-radius:999px;background:var(--surface);color:var(--text);transition:border-color .15s,background-color .15s}
.bp-flow a:hover{border-color:var(--accent);background:var(--bp-tint)}
.bp-flow b{font-family:var(--font-mono);font-size:11px;font-weight:500;color:var(--accent-ink)}
.bp-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:0 36px;margin:42px auto 0;max-width:920px;text-align:left;border-top:1px solid var(--border)}
.bp-meta div{padding:13px 0;border-bottom:1px solid var(--border);font-size:14px;color:var(--muted)}
.bp-meta dt{display:inline;font-weight:600;color:var(--text);margin-right:7px}
.bp-meta dd{display:inline}
.bp-legend{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 22px;margin-top:22px;font-size:12.5px;color:var(--muted);align-items:center}
.bp-legend span{display:inline-flex;align-items:center;gap:8px}
.bp-legend i{display:inline-block;width:16px;height:12px;border-radius:3px;border:1px solid var(--border2);background:var(--bp-card)}
.bp-legend .k-trig{background:var(--text);border-color:var(--text)}
.bp-legend .k-wait{border-style:dashed;background:var(--surface2)}
.bp-legend .k-dec{background:var(--bp-tint);border-color:var(--bp-tint-line);transform:rotate(45deg) scale(.8);border-radius:2px}
.bp-legend .k-end{background:var(--bp-tint);border:1.5px solid var(--accent)}
.bp-ver{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-ink);margin-top:18px}

/* sections */
.bp-sec{padding:70px 0 8px;border-top:1px solid var(--border);scroll-margin-top:calc(var(--bp-bar) + 4px)}
.bp-sec:nth-of-type(even){background:linear-gradient(var(--bg2),var(--bg2)) no-repeat;background-size:100% 100%}
.bp-head{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap}
.bp-num{font-family:var(--font-mono);font-size:13px;color:var(--accent-ink);font-weight:500}
.bp-head h2{font-size:clamp(1.6rem,3.4vw,2.2rem);font-weight:600;letter-spacing:-.03em;line-height:1.1;margin:0}
.bp-chip{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-ink);border:1px solid var(--bp-tint-line);background:var(--bp-tint);border-radius:6px;padding:3px 9px}
.bp-sub{color:var(--muted);font-size:1.02rem;max-width:70ch;margin:10px 0 0}
.bp-body{display:grid;grid-template-columns:250px minmax(0,1fr);gap:36px;margin-top:34px;padding-bottom:62px}
.bp-rail{align-self:start;position:sticky;top:calc(var(--bp-bar) + 22px);font-size:14px}
.bp-rail h3{font-family:var(--font-mono);font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:var(--accent-ink);font-weight:500;margin:22px 0 8px}
.bp-rail h3:first-child{margin-top:0}
.bp-rail p{color:var(--text);line-height:1.55}
.bp-rail ul{list-style:none;display:grid;gap:7px}
.bp-rail li{color:var(--muted);line-height:1.4;padding-left:16px;position:relative}
.bp-rail li::before{content:"";position:absolute;left:0;top:.6em;width:7px;height:2px;background:var(--accent)}
.bp-rail li b{color:var(--text);font-weight:600}
.bp-trig{display:flex;align-items:center;gap:9px;background:var(--text);color:var(--bg);border-radius:10px;padding:11px 14px;font-weight:600;font-size:14px;line-height:1.25}
.bp-trig::before{content:"";flex:none;width:8px;height:8px;border-radius:50%;background:var(--accent)}
.bp-note{margin-top:22px;border-left:3px solid var(--accent);background:var(--surface2);border-radius:0 8px 8px 0;padding:11px 14px;font-size:13.5px;color:var(--muted);line-height:1.5}
.bp-note b{color:var(--text)}

/* figure card */
.bp-fig{background:var(--surface);border:1px solid var(--border2);border-radius:16px;padding:22px 24px 24px;min-width:0}
.bp-figtitle{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim-text);padding-bottom:14px;margin-bottom:18px;border-bottom:1px solid var(--border)}
.bp-hint{display:none;font-family:var(--font-mono);font-size:11px;color:var(--dim-text);margin:-6px 0 10px}
.bp-scroll{overflow-x:auto}
.bp-scroll svg{display:block;width:100%;height:auto;min-width:700px}

/* tables */
.bp-table{width:100%;border-collapse:collapse;font-size:14px}
.bp-table thead th{background:var(--text);color:var(--bg);font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;text-align:left;font-weight:500;padding:11px 14px}
.bp-table thead th:first-child{border-radius:8px 0 0 8px}.bp-table thead th:last-child{border-radius:0 8px 8px 0}
.bp-table td{padding:13px 14px;border-bottom:1px solid var(--border);vertical-align:top;color:var(--muted);line-height:1.45}
.bp-table td:first-child{color:var(--text);font-weight:600}
.bp-table tr:last-child td{border-bottom:0}
.bp-table .n{font-family:var(--font-mono);font-weight:500;color:var(--accent-ink);white-space:nowrap}
.bp-table a{color:var(--text)}.bp-table a:hover{color:var(--accent-ink);text-decoration:underline}
.bp-dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:9px;vertical-align:baseline}
.bp-tscroll{overflow-x:auto}.bp-tscroll .bp-table{min-width:640px}

/* flowchart nodes (inside SVG foreignObject) */
.bpn{box-sizing:border-box;width:100%;height:100%;padding:10px 14px 9px;border:1px solid var(--border2);border-radius:10px;background:var(--bp-card);display:flex;flex-direction:column;justify-content:center;gap:2px;overflow:hidden;font-family:var(--f-sans)}
.bpn .t{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim-text);display:flex;align-items:center;gap:6px;line-height:1.2}
.bpn .t i{width:6px;height:6px;border-radius:50%;flex:none}
.bpn .l{font-size:14.5px;font-weight:600;color:var(--text);line-height:1.22;letter-spacing:-.01em}
.bpn .s{font-size:12.5px;color:var(--muted);line-height:1.28;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.bpn.trig{background:var(--text);border-color:var(--text)}
.bpn.trig .l{color:var(--bg)}.bpn.trig .t,.bpn.trig .s{color:color-mix(in srgb,var(--bg) 72%,transparent)}
.bpn.wait{border-style:dashed;background:var(--surface2)}
.bpn.end{background:var(--bp-tint);border:1.5px solid var(--accent)}
.bpn.dec{align-items:center;justify-content:center;text-align:center;border:0;background:none;padding:0 44px}
.bpn.dec .l{font-size:14px}
.bp-dia{fill:var(--bp-tint);stroke:var(--bp-tint-line);stroke-width:1.5}
.bp-edge{fill:none;stroke:var(--bp-edge);stroke-width:1.5;stroke-linejoin:round}
.bp-arrow{fill:var(--bp-edge)}
.bp-lbl rect{fill:var(--bg);stroke:var(--border2)}
.bp-lbl text{font-family:var(--font-mono);font-size:11px;font-weight:500;fill:var(--text);text-anchor:middle;dominant-baseline:central}
.bp-steps{margin-top:18px;border-top:1px solid var(--border);padding-top:12px;font-size:14px}
.bp-steps summary{cursor:pointer;color:var(--accent-ink);font-weight:500;list-style:none}
.bp-steps summary::-webkit-details-marker{display:none}
.bp-steps summary::before{content:"+ "}
.bp-steps[open] summary::before{content:"\2212  "}
.bp-steps ol{margin:12px 0 0 20px;display:grid;gap:7px;color:var(--muted)}
.bp-steps li b{color:var(--text);font-weight:600}

/* closing */
.bp-end{padding:56px 0 20px;border-top:1px solid var(--border)}
.bp-end p{color:var(--muted);max-width:62ch;margin:8px 0 16px}
.bp-fine{font-size:13px;color:var(--dim-text);max-width:70ch;margin-top:14px}
.bp-link{display:inline-block;margin-top:6px;color:var(--accent-ink);font-size:14px}
.bp-link:hover{text-decoration:underline}

/* chain of stages in intro: connector */
@media (max-width:980px){
  .bp-body{grid-template-columns:1fr;gap:26px}
  .bp-rail{position:static}
  .bp-hint{display:block}
  .bp-doc span{display:none}
}
@media (max-width:640px){
  .bp-wrap{padding:0 16px}
  .bp-intro{padding:40px 0 30px}
  .bp-sec{padding-top:48px}
  .bp-fig{padding:16px 14px 18px;border-radius:14px}
  .bp-bar .bp-wrap{gap:12px}
  .bp-doc{display:none}
}
@media (prefers-reduced-motion:reduce){.bp-tabs a,.bp-flow a{transition:none}}

/* reference tables: code chips, pipeline lanes, handoff chains */
.bp-fig code,.bp-rail code{font-family:var(--font-mono);font-size:12px;background:var(--surface2);border:1px solid var(--border);border-radius:5px;padding:1px 6px;color:var(--text)}
.bp-table code{white-space:nowrap}
.bp-lane{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:10px}
.bp-lanename{flex:none;width:96px;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-ink)}
.bp-lane b{font-size:13px;font-weight:600;padding:7px 12px;border:1px solid var(--border2);border-radius:8px;background:var(--bg);color:var(--text)}
.bp-lane i{font-style:normal;color:var(--dim-text)}
.bp-lane + .bp-tscroll,.bp-chain + .bp-tscroll{margin-top:22px}
.bp-lane:last-of-type{margin-bottom:0}
.bp-chain{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:10px}
.bp-chain span{font-size:13px;font-weight:600;padding:7px 12px;border:1px solid var(--border2);border-radius:8px;background:var(--bg)}
.bp-chain i{display:inline-flex;align-items:center;gap:7px;font-style:normal;font-family:var(--font-mono);font-size:11px;letter-spacing:.04em;color:var(--dim-text)}
.bp-chain i::after{content:"\2192";font-size:14px;color:var(--accent-ink)}
.bp-chain a{color:inherit}

.bp-step{display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
@media (max-width:640px){.bp-lanename{width:100%}}

/* restored live demo card: keep it at its designed width, it has its own frame */
.bp-demo{min-width:0;max-width:880px}
.bp-demo .pcard{margin:0}
.bpn.err{border-color:color-mix(in srgb,#dc2626 55%,var(--border2));background:color-mix(in srgb,#dc2626 7%,var(--bp-card))}
.bp-legend .k-err{background:color-mix(in srgb,#dc2626 12%,var(--bp-card));border-color:color-mix(in srgb,#dc2626 55%,var(--border2))}