/* GeaSpirit — Experimental and future technologies: the two reference chapters under /gravity/ and the
   hub block on /gravity/ (C2065). The gv-* rules repeat the look of /gravity/, whose styles are inline
   on that page; the chapter pages do not load /gravity/'s map code. */
.tc-wrap{max-width:1320px;margin:0 auto;padding:16px 16px 56px;padding-top:calc(var(--gea-header-h, 92px) + 16px)}
@media(max-width:760px){.tc-wrap{padding-top:calc(var(--gea-header-h, 78px) + 12px)}}
.tc-page .gv-h1{font-size:27px;color:#eafaf3;margin:0 0 4px;letter-spacing:-.3px}
.tc-page .gv-sub{font-size:14px;color:#8b97a6;margin:0 0 10px}
.tc-page .gv-intro{max-width:860px;color:#b9c6cf;font-size:14.8px;line-height:1.68;margin:8px 0 14px}
.tc-page .gv-h2{font-size:20px;color:#eafaf3;margin:8px 0 8px;letter-spacing:-.2px}
.tc-page .gv-p{font-size:14.3px;color:#b9c6cf;line-height:1.74;max-width:900px;margin:10px 0}
.tc-page .gv-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:12px;margin:16px 0}
.tc-page .gv-card{background:#0e151c;border:1px solid #1d2731;border-radius:12px;padding:15px 16px}
.tc-page .gv-card h3{font-size:14.5px;color:#eafaf3;margin:0 0 8px}
.tc-page .gv-card p{font-size:13.2px;color:#a9b8c2;line-height:1.66;margin:0}
.tc-page .gv-note{background:#121a12;border:1px solid #2c4030;border-left:3px solid #4d8a5f;border-radius:10px;
  padding:14px 16px;margin:16px 0;font-size:13.6px;color:#c2d6c8;line-height:1.7;max-width:920px}
.tc-page .gv-warn{background:#1c1710;border:1px solid #453619;border-left:3px solid #b8862b;border-radius:10px;
  padding:14px 16px;margin:16px 0;font-size:13.6px;color:#e2d3b4;line-height:1.7;max-width:920px}
.tc-page .gv-a{color:#7fd1b9;text-decoration:none;border-bottom:1px solid #2b4b41;overflow-wrap:anywhere}
.tc-page .gv-a:hover{color:#a8e8d2}
.tc-page .gv-num{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:8px;
  background:#132029;border:1px solid #24323d;color:#7fd6b0;font-size:13px;font-weight:700;margin-right:12px;flex:0 0 auto}
.tc-page .gv-tblwrap{overflow-x:auto;max-width:100%;margin:8px 0 12px;-webkit-overflow-scrolling:touch}
.tc-page .gv-tbl{border-collapse:collapse;font-size:13px;min-width:680px;width:100%}
.tc-page .gv-tbl th,.tc-page .gv-tbl td{border:1px solid #1d2731;padding:9px 11px;text-align:start;vertical-align:top;color:#c3d4de;line-height:1.55}
.tc-page .gv-tbl thead th{background:#101922;color:#eafaf3;font-weight:600}
.tc-page .gv-tbl tbody th{color:#eafaf3;font-weight:600;background:#0e151c}
.tc-page .tc-cmp{min-width:980px}
.tc-page .gv-rd-fields{margin:0;display:grid;grid-template-columns:1fr;gap:0}
.tc-page .gv-rd-f{padding:10px 0;border-top:1px solid #1a232c}
.tc-page .gv-rd-f dt{font:600 10px/1.4 monospace;letter-spacing:.9px;text-transform:uppercase;color:#7e9a8c}
.tc-page .gv-rd-f dd{margin:4px 0 0;font-size:13.6px;color:#b9c6cf;line-height:1.7}
@media(min-width:1000px){.tc-page .gv-rd-f{display:grid;grid-template-columns:200px 1fr;gap:16px;align-items:start}.tc-page .gv-rd-f dd{margin:0}}

/* layout: sticky contents on wide screens, a block above the text on narrow ones */
.tc-layout{display:block}
.tc-main{min-width:0}
@media(min-width:1080px){
  .tc-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:30px;align-items:start}
  .tc-toc{position:sticky;top:calc(var(--gea-header-h, 92px) + 14px);max-height:calc(100vh - var(--gea-header-h, 92px) - 28px);overflow-y:auto}
}
.tc-toc{background:#0e151c;border:1px solid #1d2731;border-radius:12px;padding:14px 16px;margin:6px 0 20px}
.tc-toc h2{font:600 10.5px/1.4 monospace;letter-spacing:1.1px;text-transform:uppercase;color:#7e9a8c;margin:0 0 8px}
.tc-toc ol{margin:0;padding-inline-start:20px;color:#5f7280;font-size:12.5px}
.tc-toc li{margin:0 0 6px;line-height:1.4}
.tc-toc a{color:#b9c6cf;text-decoration:none}
.tc-toc a:hover,.tc-toc a.on{color:#7fd1b9}
.tc-toc a.on{font-weight:600}
.tc-tools{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.tc-btn{font:600 11px/1 system-ui,sans-serif;color:#cdddd4;background:#132029;border:1px solid #27404f;border-radius:18px;padding:7px 12px;cursor:pointer}
.tc-btn:hover{border-color:#3a7a4f;color:#eafaf3}
.tc-btn:focus-visible,.tc-toc a:focus-visible,.tc-d summary:focus-visible,.tc-hubcard:focus-visible{outline:2px solid #7fd1b9;outline-offset:2px}

.tc-hero{margin-bottom:6px}
.tc-legends{display:grid;gap:8px;max-width:920px;margin:6px 0 18px}
.tc-legend{margin:0;font-size:12.6px;color:#9fb3bf;line-height:1.6;background:#0b1117;border:1px solid #1a232c;border-radius:10px;padding:10px 13px}
.tc-legend b{color:#dbe7ef}

.tc-sec{margin:0 0 30px;scroll-margin-top:calc(var(--gea-header-h, 92px) + 12px)}
.tc-m{background:#0e151c;border:1px solid #1d2731;border-radius:14px;padding:18px 20px}
@media(max-width:560px){.tc-m{padding:15px 14px}}
.tc-mh{display:flex;align-items:flex-start}
.tc-h2m{font-size:19px;color:#eafaf3;margin:0 0 2px;letter-spacing:-.2px}
.tc-msub{font-size:13px;color:#8b97a6;margin:0 0 10px}
.tc-chips{display:flex;flex-wrap:wrap;gap:6px;margin:4px 0 12px}
.tc-chip{font:600 9.6px/1 monospace;letter-spacing:1px;padding:6px 9px;border-radius:20px;border:1px solid}
.tc-chip.pf{background:#101922;color:#cfe0ea;border-color:#2c3b48}
.tc-chip.pf::before{content:"";display:inline-block;width:7px;height:7px;border-radius:2px;margin-inline-end:6px;vertical-align:0}
.tc-chip.pf-sat::before{background:#7fc8f0}.tc-chip.pf-air::before{background:#f0c674}
.tc-chip.pf-sea::before{background:#5aa9e6;border-radius:50%}.tc-chip.pf-gnd::before{background:#c9a57a}
.tc-chip.st-op{background:#13251a;color:#8fe0b0;border-color:#2f6a46}
.tc-chip.st-exp{background:#1a2030;color:#a9c4ff;border-color:#34466e}
.tc-chip.st-prop{background:#2a2113;color:#f0c674;border-color:#4d3d1c}
.tc-chip.st-rep,.tc-chip.st-ill{background:#2a1616;color:#f2a3a3;border-color:#5a2a2a}
.tc-key{font-size:14.6px;color:#eafaf3;line-height:1.6;margin:0 0 12px;max-width:900px;border-inline-start:3px solid #3a7a4f;padding-inline-start:12px}
.tc-d{margin-top:12px;border-top:1px solid #1a232c}
.tc-d summary{cursor:pointer;list-style:none;padding:12px 0 8px;font-size:13px;font-weight:600;color:#7fd1b9}
.tc-d summary::-webkit-details-marker{display:none}
.tc-d summary::before{content:"\25B8";display:inline-block;margin-inline-end:8px;transition:transform .15s}
.tc-d[open] summary::before{transform:rotate(90deg)}
.tc-refl{font-size:12.5px;margin:6px 0 0}
.tc-refl a{color:#7fd1b9;text-decoration:none;margin-inline-end:4px}
.tc-list{max-width:900px;color:#c3d4de;font-size:14px;line-height:1.68;padding-inline-start:22px}
.tc-list li{margin:0 0 9px}
.tc-list b,.gv-note b,.gv-warn b{color:#eafaf3}
.tc-steps{max-width:900px;color:#c3d4de;font-size:14px;line-height:1.66;padding-inline-start:24px;margin:14px 0}
.tc-steps li{margin:0 0 10px}
.tc-ladder{list-style:none;counter-reset:lad;padding:0;margin:14px 0;display:grid;gap:8px;max-width:920px}
.tc-ladder li{counter-increment:lad;display:grid;grid-template-columns:34px 1fr;column-gap:10px;background:#0e151c;border:1px solid #1d2731;border-radius:10px;padding:11px 14px}
.tc-ladder li::before{content:counter(lad);grid-row:1 / span 2;display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:8px;background:#132029;border:1px solid #24323d;color:#7fd6b0;font-weight:700;font-size:13px}
.tc-ladder li:nth-child(4)::before,.tc-ladder li:nth-child(5)::before{background:#2a2113;border-color:#4d3d1c;color:#f0c674}
.tc-ladder b{color:#eafaf3;font-size:14px}
.tc-ladder span{color:#a9b8c2;font-size:13.3px;line-height:1.6}
.tc-proposal{border:1px dashed #4d3d1c;border-radius:14px;padding:16px 18px;background:#110f0a}
.tc-refs{font-size:12.6px;color:#9fb3bf;line-height:1.6;padding-inline-start:24px;max-width:980px}
.tc-refs li{margin:0 0 7px;scroll-margin-top:calc(var(--gea-header-h, 92px) + 12px)}
.tc-refs li:target{background:#13251a;border-radius:6px}
.tc-note-s{font-size:12.4px;color:#7e8f9b;margin:0 0 10px;max-width:900px}
.tc-other{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin:22px 0 0;font-size:13.4px;color:#8b97a6}

/* figures */
.tc-fig{margin:14px 0 16px;background:#0b1117;border:1px solid #1a232c;border-radius:12px;padding:12px 12px 10px;max-width:760px;position:relative}
.tc-svg{display:block;width:100%;height:auto;direction:ltr}
.tc-svg text{paint-order:stroke;stroke:#0b1117;stroke-width:2.6px;stroke-linejoin:round;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans","Noto Sans Arabic","Noto Sans Hebrew","Noto Sans Devanagari","Noto Sans CJK SC",sans-serif;font-size:12.5px;fill:#d7e3ea}
.tc-svg .tc-b{font-weight:700;fill:#eafaf3}
.tc-svg .tc-gr{fill:#8fe6bd}.tc-svg .tc-or{fill:#f3b277}.tc-svg .tc-y{fill:#f4d58a}.tc-svg .tc-red{fill:#f08c8c}
.tc-svg .tc-warn{fill:#ff9a9a;font-style:italic}.tc-svg .tc-dim{fill:#9fb3bf}
.tc-svg .tc-ax{font-size:10.5px;fill:#9fb3bf}
.tc-svg .tc-n{fill:#132029;stroke:#7fd1b9;stroke-width:1.4}
.tc-svg .tc-nt{font-size:11px;font-weight:700;fill:#7fd6b0}
.tc-fig figcaption{font-size:12.6px;color:#9fb3bf;line-height:1.55;margin-top:8px}
.tc-fig figcaption b{color:#dbe7ef}
.tc-figsteps{margin:8px 0 0;padding-inline-start:22px;font-size:12.8px;color:#c3d4de;line-height:1.55;list-style:none;counter-reset:fs}
.tc-figsteps li{counter-increment:fs;position:relative;margin:0 0 4px}
.tc-figsteps li::before{content:counter(fs);position:absolute;inset-inline-start:-22px;top:1px;width:16px;height:16px;border-radius:50%;border:1px solid #7fd1b9;color:#7fd6b0;font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center}
#fig-b1 .tc-figsteps li::before{border-radius:3px}
.tc-stamp{display:table;margin:0 0 8px auto;font:600 9px/1 monospace;letter-spacing:.8px;color:#f0a35a;background:#1c1710;border:1px solid #453619;border-radius:12px;padding:4px 7px;max-width:60%;text-align:end}
.tc-svgwrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
@media(max-width:560px){.tc-fig{padding:10px 6px 8px}.tc-svg{min-width:480px}}

/* hub on /gravity/ */
.tc-hub{margin:8px 0 28px;max-width:1100px}
.tc-hubgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px;margin-top:12px}
.tc-hubcard{display:flex;flex-direction:column;gap:8px;background:linear-gradient(160deg,#0f1b22,#0b1117);border:1px solid #24323d;border-radius:14px;padding:16px 18px;text-decoration:none;transition:border-color .15s}
.tc-hubcard:hover{border-color:#3a7a4f}
.tc-hubk{font-size:16px;font-weight:700;color:#eafaf3}
.tc-hubp{font-size:13.2px;color:#a9b8c2;line-height:1.6}
.tc-hubgo{font-size:12.8px;color:#7fd1b9;font-weight:600;margin-top:auto}