/* The educative section (card 28G-C13, GT-Gamma): path entries, path stepper, explainer reader, Digital Life library, glossary popover.
   One calm colour system: navy and the blue family from site.css, neutrals; orange only for focus rings and progress fills. No segment hues.
   Everything is final-state by default: motion states only apply under html.js.mo (motion.js), and the stage is readable without JS. */
.tc-reader,.tc-paths,.tc-glossary{padding-block:var(--s7)}
.tc-reader > .wrap,.tc-paths > .wrap,.tc-glossary > .wrap{display:flex;flex-direction:column;gap:var(--s4)}
.tc-reader h2,.tc-paths h2,.tc-glossary h2{max-width:22ch}
.tc-btn:focus-visible,.tc-tab:focus-visible,.tc-gtab:focus-visible,.tc-tip-btn:focus-visible,.tc-pmain:focus-visible,.tc-node:focus-visible,.tc-next:focus-visible,.gl-term:focus-visible,.tc-src summary:focus-visible,.gl-pop button:focus-visible,.tc-stop:focus-visible{outline:3px solid var(--action);outline-offset:3px;border-radius:8px}
.tc-pmain,.tc-node,.tc-tab,.tc-path a,.tc-next,.tc-pill,.tc-gtab,.tc-tip-btn,.tc-parrow{background-image:none!important}
.tc-stage [data-in-step].is-pending{opacity:.62}
.tc-nw,.tc-review{display:inline-block;font-size:.8125rem;line-height:1.35;padding:2px 8px;border:1px dashed var(--muted);border-radius:6px;color:var(--muted);background:transparent;font-weight:700;letter-spacing:.01em;vertical-align:middle}
.tc-nw{margin-top:var(--s1);max-width:100%;overflow-wrap:anywhere}
.tc-review{margin-left:var(--s1)}

/* ---- group strip (tabs) ---- */
.tc-gstrip{display:flex;gap:var(--s1);border-bottom:1px solid var(--line);overflow-x:auto;scrollbar-width:none;margin-inline:calc(var(--s3) * -1);padding-inline:var(--s3)}
.tc-gstrip::-webkit-scrollbar{display:none}
.tc-gtab{position:relative;display:inline-flex;align-items:center;gap:10px;min-height:56px;padding:10px var(--s2);border:0;background:none;color:var(--muted);font:inherit;font-size:var(--fs-1);font-weight:700;cursor:pointer;white-space:nowrap;border-radius:10px 10px 0 0;transition:color var(--d-ui,220ms) ease}
.tc-gtab b{display:inline-grid;place-items:center;min-width:26px;height:26px;padding:0 6px;border-radius:13px;border:1px solid var(--line);font-size:var(--fs-0);color:var(--muted)}
.tc-gtab::after{content:"";position:absolute;left:var(--s2);right:var(--s2);bottom:-1px;height:3px;border-radius:3px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform var(--d-panel,280ms) cubic-bezier(.2,.7,.2,1)}
.tc-gtab:hover{color:var(--text)}
.tc-gtab[aria-selected="true"]{color:var(--text)}
.tc-gtab[aria-selected="true"]::after{transform:scaleX(1)}
.tc-gtab[aria-selected="true"] b{background:var(--accent);border-color:var(--accent);color:#fff}
:root[data-theme="dark"] .tc-gtab[aria-selected="true"] b{color:#080D26}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .tc-gtab[aria-selected="true"] b{color:#080D26}}

/* ---- topic row ---- */
.tc-row{display:flex;gap:var(--s2);overflow-x:auto;padding:6px 4px 14px;margin-inline:calc(var(--s3) * -1);padding-inline:var(--s3);scroll-snap-type:x proximity;scrollbar-width:thin}
.tc-tab{flex:0 0 232px;height:128px;scroll-snap-align:start;display:flex;flex-direction:column;justify-content:space-between;gap:var(--s1);padding:var(--s2);border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface);color:var(--text);text-decoration:none;box-shadow:var(--shadow);transition:transform var(--d-ui,220ms) cubic-bezier(.2,.7,.2,1),border-color var(--d-ui,220ms) ease,background var(--d-ui,220ms) ease}
.tc-tab[hidden]{display:none}
.tc-tab-no{font-size:var(--fs-3);font-weight:700;line-height:1;color:var(--accent-text);font-variant-numeric:tabular-nums}
.tc-tab-t{font-size:var(--fs-1);font-weight:700;line-height:1.2;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.tc-tab:hover{transform:translateY(-3px);border-color:var(--accent)}
.tc-tab[aria-selected="true"]{background:var(--navy);border-color:var(--navy);color:var(--on-navy);transform:translateY(-3px)}
.tc-tab[aria-selected="true"] .tc-tab-no{color:#8FA6EE}
.tc-tab[aria-selected="true"] .tc-tab-t{color:#fff}
:root[data-theme="dark"] .tc-tab[aria-selected="true"],:root[data-theme="dark"] .tc-tab[aria-selected="true"]{background:#1B275A;border-color:#8FA6EE}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .tc-tab[aria-selected="true"]{background:#1B275A;border-color:#8FA6EE}}

/* ---- card ---- */
.tc-cards{display:block}
.js .tc-card:not(.is-current):not([hidden]),.js .tc-cat > .tc-card:not(.is-current):not([hidden]){display:none}
.tc-card{display:flex;flex-direction:column;gap:var(--s3);scroll-margin-top:96px}
html:not(.js) .tc-card + .tc-card{margin-top:var(--s6)}
.tc-head{display:flex;flex-direction:column;gap:var(--s1)}
.tc-kicker{display:flex;flex-wrap:wrap;align-items:center;gap:var(--s2);font-size:var(--fs-0);font-weight:700;color:var(--accent-text);letter-spacing:.04em;text-transform:uppercase;max-width:none}
.tc-no{color:var(--muted);font-variant-numeric:tabular-nums}
.tc-head h3{font-size:clamp(var(--fs-3),3.4vw,var(--fs-5));line-height:1.1;max-width:24ch}
.tc-glance{font-size:var(--fs-2);line-height:1.45;color:var(--text);max-width:62ch}
.tc-body{display:grid;grid-template-columns:minmax(0,1fr) 312px;gap:var(--s3);align-items:stretch}
/* 29A-17: the stage is navy in both themes, so a drawing inside it takes the kit's dark tokens in both themes. In the light theme the
   light tokens put white text strokes (the label halo) on navy, which read as a grey halo. Same values as .gk.dark in teach-art.css. */
.tc-stage .gk{--bg:#080D26;--ink:#EEF1FA;--muted:#B4BED8;--blue:#8FA6EE;--blue-t:rgba(143,166,238,.12);--blue-m:rgba(143,166,238,.26);--top:#1B275A;--left:#131D4A;--right:#0D1539;--edge:rgba(180,190,216,.40);--plate-t:#101A45;--plate-l:#0C1438;--plate-r:#09102E;--decal:rgba(180,190,216,.46);--decal-s:rgba(180,190,216,.14);--shadow:rgba(0,0,0,.35);--gd:rgba(180,190,216,.10);--live:#8FA6EE}
.tc-stage{margin:0;border-radius:var(--radius-lg);background:var(--stage);color:#EEF1FA;overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow);min-width:0}
.tc-view{position:relative;display:flex;flex-direction:column;background:radial-gradient(120% 90% at 20% 0%,rgba(143,166,238,.14),transparent 60%),var(--stage)}
.tc-art{position:relative;aspect-ratio:16/9;width:100%}
.tc-art svg{display:block;width:100%;height:100%}
.tc-art-narrow{display:none}
.tc-svg .tc-dot{fill:rgba(180,190,216,.22)}
.tc-svg .tc-rail{fill:none;stroke:rgba(143,166,238,.28);stroke-width:3;stroke-linecap:round}
.tc-svg .tc-flow{fill:none;stroke:none;color:#EEF1FA}
.tc-svg .tc-conn{fill:none;stroke:#8FA6EE;stroke-width:3;stroke-linecap:round;transition:opacity var(--d-ui,220ms) ease}
.tc-svg .tc-halo{fill:rgba(143,166,238,.0)}
.tc-svg .tc-ring{fill:#0C1844;stroke:#8FA6EE;stroke-width:3}
.tc-svg .tc-disc{fill:rgba(143,166,238,.28)}
.tc-svg .tc-num{fill:#EEF1FA;font:700 22px Carlito,Calibri,"Segoe UI",Arial,sans-serif}
.tc-svg .tc-stop{cursor:pointer;outline:none}
.tc-stop.is-now .tc-disc{fill:#EEF1FA}.tc-stop.is-now .tc-num{fill:#0C1844}.tc-stop.is-now .tc-halo{fill:rgba(143,166,238,.22)}
.tc-stop.is-done .tc-disc{fill:#8FA6EE}.tc-stop.is-done .tc-num{fill:#0C1844}
html.js.mo .tc-svg .tc-conn:not(.is-flowing){opacity:.55}
.tc-cap{position:static;margin:0;max-width:none;padding:var(--s3) var(--s4);font-size:1.3125rem;line-height:1.4;color:#EEF1FA;background:#0C1844;border-top:1px solid rgba(238,241,250,.14);min-height:calc(2 * 1.4em + 2 * var(--s3));display:flex;align-items:center}
.tc-ctl{display:flex;align-items:center;gap:var(--s1);padding:var(--s2) var(--s3);border-top:1px solid rgba(238,241,250,.14);position:relative}
.tc-prog{position:absolute;left:0;right:0;top:-1px;height:3px;background:rgba(238,241,250,.12);overflow:hidden}
.tc-prog i{display:block;height:100%;background:#8FA6EE;transform-origin:0 50%}
.tc-btn{font:inherit;cursor:pointer}
.tc-icon{display:inline-grid;place-items:center;width:48px;height:48px;border-radius:50%;border:1.5px solid rgba(238,241,250,.4);background:transparent;color:#EEF1FA;transition:background var(--d-ui,220ms) ease,border-color var(--d-ui,220ms) ease,transform 120ms ease}
.tc-icon svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.tc-icon:hover:not(:disabled){background:rgba(238,241,250,.12);border-color:#EEF1FA}
.tc-icon:active:not(:disabled){transform:scale(.94)}
.tc-icon:disabled{opacity:.35;cursor:default}
.tc-playbtn .i-pause{display:none}.tc-playbtn.is-playing .i-play{display:none}.tc-playbtn.is-playing .i-pause{display:block}
.tc-playbtn svg.i-play{fill:currentColor;stroke:none}
.tc-count{margin-left:auto;font-size:var(--fs-1);color:#B4BED8;font-variant-numeric:tabular-nums}.tc-count b{color:#EEF1FA}
.tc-steps{margin:0;padding:var(--s3);list-style:none;display:flex;flex-direction:column;gap:var(--s2);counter-reset:s}
.tc-steps[hidden]{display:none}
/* 28G-C42: a card without a drawing shows its steps as a text panel in the stage colour */
.tc-body-text{align-items:start}
.tc-steps.tc-plain{margin:0;padding:var(--s4);border-radius:var(--radius-lg);background:var(--stage);box-shadow:var(--shadow);min-width:0}
.tc-body-text .tc-panel{padding-block:var(--s2)}
.tc-steps li{position:relative;padding-left:48px;font-size:var(--fs-1);line-height:1.5;color:#EEF1FA;max-width:none;counter-increment:s}
.tc-steps li::before{content:counter(s);position:absolute;left:0;top:0;width:34px;height:34px;border-radius:50%;border:2px solid #8FA6EE;display:grid;place-items:center;font-weight:700;font-size:var(--fs-0)}
.tc-steps li a{color:#EEF1FA}
.tc-stage.is-text .tc-view,.tc-stage.is-text .tc-ctl{display:none}
.tc-live{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.tc-stage .gl-term{text-decoration-color:#8FA6EE}

/* ---- text panel ---- */
.tc-panel{display:flex;flex-direction:column;gap:var(--s3);padding:var(--s3);border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface);box-shadow:var(--shadow);min-width:0}
.tc-step-no{display:flex;align-items:baseline;gap:8px;color:var(--muted);font-size:var(--fs-1);margin:0}
.tc-step-no b{font-size:var(--fs-6);line-height:1;color:var(--accent-text);font-variant-numeric:tabular-nums}
.tc-step-txt{font-size:var(--fs-1);line-height:1.5;flex:1}
.tc-acts{display:flex;flex-direction:column;gap:var(--s1);align-items:stretch}
.tc-pill{display:inline-flex;align-items:center;justify-content:space-between;gap:var(--s1);min-height:48px;padding:10px var(--s2);border-radius:999px;border:2px solid var(--text);background:transparent;color:var(--text);font-weight:700;font-size:var(--fs-0);flex-wrap:wrap;transition:background var(--d-ui,220ms) ease,color var(--d-ui,220ms) ease,border-color var(--d-ui,220ms) ease,transform 120ms ease}
.tc-pill:hover{border-color:var(--accent);color:var(--accent-text)}
.tc-pill[aria-pressed="true"],.tc-pill[aria-expanded="true"]{background:var(--navy);border-color:var(--navy);color:var(--on-navy)}
:root[data-theme="dark"] .tc-pill[aria-pressed="true"],:root[data-theme="dark"] .tc-pill[aria-expanded="true"]{background:#1B275A;border-color:#8FA6EE}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .tc-pill[aria-pressed="true"],:root:not([data-theme="light"]) .tc-pill[aria-expanded="true"]{background:#1B275A;border-color:#8FA6EE}}
.tc-all i{width:10px;height:10px;border-right:2.5px solid currentColor;border-bottom:2.5px solid currentColor;transform:translateY(-3px) rotate(45deg);transition:transform var(--d-panel,280ms) cubic-bezier(.2,.7,.2,1);flex:none}
.tc-all[aria-expanded="true"] i{transform:translateY(3px) rotate(-135deg)}
.tc-all .tc-review{border-color:currentColor;color:inherit;flex-basis:100%;margin:0;text-align:center}
.tc-next{display:flex;align-items:center;justify-content:space-between;gap:var(--s1);min-height:52px;padding:10px var(--s2);border-radius:999px;background:var(--action);color:var(--on-action);font-weight:700;text-decoration:none;font-size:var(--fs-1)}
.tc-next[hidden]{display:none}
.tc-next:hover{background:var(--action-hover);color:var(--on-action)}
.tc-next i{width:10px;height:10px;border-right:3px solid currentColor;border-top:3px solid currentColor;transform:rotate(45deg);transition:transform var(--d-ui,220ms) ease;flex:none}
.tc-next:hover i{transform:translateX(3px) rotate(45deg)}

/* ---- reading area ---- */
.tc-more{display:grid;grid-template-rows:0fr;transition:grid-template-rows var(--d-panel,280ms) cubic-bezier(.2,.7,.2,1)}
.tc-more.is-open{grid-template-rows:1fr}
.tc-more-in{overflow:hidden;min-height:0}
.tc-cols{display:grid;grid-template-columns:repeat(2,minmax(0,560px));gap:var(--s5);justify-content:space-between;padding-block:var(--s3) var(--s2)}
.tc-cols > div{display:flex;flex-direction:column;gap:var(--s3);min-width:0}
.tc-blk h4{font-size:var(--fs-1);color:var(--accent-text);margin-bottom:var(--s1)}
.tc-blk p + p{margin-top:var(--s1)}
.tc-blk p{overflow-wrap:anywhere}
.tc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--s1)}
.tc-list li{position:relative;padding-left:24px}
.tc-list li::before{content:"";position:absolute;left:0;top:.7em;width:12px;height:2px;background:var(--accent)}
.tc-legal{font-size:var(--fs-0);color:var(--muted);border-left:3px solid var(--accent);padding-left:var(--s2)}
.tc-src{border-top:1px solid var(--line);margin-top:var(--s2)}
.tc-src summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:var(--s2);min-height:56px;cursor:pointer;font-weight:700;font-size:var(--fs-1)}
.tc-src summary::-webkit-details-marker{display:none}
.tc-src summary::after{content:"";width:12px;height:12px;border-right:3px solid var(--accent);border-bottom:3px solid var(--accent);transform:translateY(-3px) rotate(45deg);transition:transform var(--d-panel,280ms) ease}
.tc-src[open] summary::after{transform:translateY(3px) rotate(-135deg)}
.tc-src-in{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--s4);padding-bottom:var(--s3)}
.tc-src-in h4{font-size:var(--fs-0);color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:var(--s1)}
.tc-rel{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--s1);font-size:var(--fs-0)}
.tc-rel a{overflow-wrap:anywhere}

/* ---- gl-term and popover ---- */
.gl-term{text-decoration:underline dotted;text-decoration-thickness:2px;text-underline-offset:4px;text-decoration-color:var(--accent);color:inherit;cursor:help}
.gl-term:hover{color:var(--accent-text)}
.gl-pop{position:fixed;z-index:80;width:min(340px,calc(100vw - 32px));padding:var(--s3);border-radius:var(--radius-lg);background:var(--surface);color:var(--text);border:1px solid var(--line);box-shadow:0 18px 48px rgba(12,24,68,.28);display:flex;flex-direction:column;gap:var(--s1);transform-origin:var(--ox,50%) var(--oy,0)}
.gl-pop[hidden]{display:none}
.gl-pop strong{font-size:var(--fs-1)}
.gl-pop p{font-size:var(--fs-0);line-height:1.5;margin:0}
.gl-pop a{font-weight:700;font-size:var(--fs-0);color:var(--accent-text)}
.gl-pop .gl-x{position:absolute;top:8px;right:8px;width:40px;height:40px;border:0;border-radius:50%;background:transparent;color:var(--text);font:inherit;font-size:1.5rem;cursor:pointer}
.gl-pop .gl-x:hover{background:var(--surface-2)}
.gl-pop .gl-lbl{padding-right:36px}
html.js.mo .gl-pop.is-in{animation:gl-in var(--d-ui,220ms) cubic-bezier(.2,.7,.2,1) both}
@keyframes gl-in{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:none}}
.gl-scrim{position:fixed;inset:0;z-index:79;background:rgba(8,13,38,.45)}
.gl-scrim[hidden]{display:none}

/* ---- learning paths: Home entries ---- */
.tc-plist{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--s3);align-items:start}
.tc-pcard{display:flex;flex-direction:column;gap:var(--s2);padding:var(--s3);border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow)}
.tc-pcard:nth-child(even){margin-top:var(--s4)}
.tc-pmain{display:flex;flex-direction:column;gap:var(--s2);text-decoration:none;color:var(--text);border-radius:10px;min-height:150px}
.tc-pno{font-size:4.25rem;font-weight:700;line-height:.9;color:var(--accent-text);opacity:.9;font-variant-numeric:tabular-nums}
.tc-pname{font-size:var(--fs-2);font-weight:700;line-height:1.2;flex:1}
.tc-parrow{align-self:flex-start;width:44px;height:44px;border-radius:50%;border:2px solid currentColor;position:relative;transition:background var(--d-ui,220ms) ease,color var(--d-ui,220ms) ease,transform var(--d-ui,220ms) ease}
.tc-parrow::after{content:"";position:absolute;left:14px;top:15px;width:10px;height:10px;border-right:3px solid currentColor;border-top:3px solid currentColor;transform:rotate(45deg)}
.tc-pmain:hover .tc-parrow{background:var(--action);border-color:var(--action);color:var(--on-action);transform:translateX(4px)}
.tc-ptrack{position:relative;height:36px}
.tc-pline{position:absolute;left:8px;right:8px;top:16px;width:calc(100% - 16px);height:4px;overflow:visible}
.tc-pline path{fill:none;stroke:var(--accent);stroke-width:4;vector-effect:non-scaling-stroke;opacity:.5}
.tc-nodes{position:relative;display:flex;justify-content:space-between;align-items:center;height:36px}
.tc-node{display:grid;place-items:center;width:28px;height:36px;text-decoration:none}
.tc-node i{width:16px;height:16px;border-radius:50%;background:var(--surface);border:3px solid var(--accent);transition:transform var(--d-ui,220ms) ease,background var(--d-ui,220ms) ease}
.tc-node:hover i{transform:scale(1.35);background:var(--accent)}

/* ---- learning path stepper (built by teach.js above the topic) ---- */
.tc-path{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface-2);padding:var(--s2) var(--s3);display:flex;flex-direction:column;gap:var(--s2)}
.tc-path[hidden]{display:none}
.tc-path-top{display:flex;align-items:baseline;justify-content:space-between;gap:var(--s2);flex-wrap:wrap}
.tc-path-name{font-weight:700;font-size:var(--fs-1);color:var(--accent-text)}
.tc-path-n{font-size:var(--fs-1);color:var(--muted);font-variant-numeric:tabular-nums}
.tc-path ol{list-style:none;margin:0;padding:0;display:flex;gap:0;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none}
.tc-path ol::-webkit-scrollbar{display:none}
.tc-path li{flex:1 0 64px;position:relative;scroll-snap-align:center;display:flex;justify-content:center;min-width:64px}
.tc-path li::before{content:"";position:absolute;top:21px;left:-50%;width:100%;height:3px;background:var(--line)}
.tc-path li:first-child::before{display:none}
.tc-path li.is-visited::before,.tc-path li.is-current::before{background:var(--accent)}
.tc-path li a{position:relative;display:grid;place-items:center;width:44px;height:44px;border-radius:50%;border:3px solid var(--accent);background:var(--surface);color:var(--accent-text);font-weight:700;text-decoration:none;font-size:var(--fs-0);opacity:.55;transition:transform var(--d-ui,220ms) ease}
.tc-path li.is-visited a{background:var(--accent);color:#fff;opacity:1}
:root[data-theme="dark"] .tc-path li.is-visited a{color:#080D26}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .tc-path li.is-visited a{color:#080D26}}
.tc-path li.is-current a{opacity:1;background:var(--surface);box-shadow:0 0 0 5px color-mix(in srgb,var(--accent) 28%,transparent);transform:scale(1.08)}
.tc-path li a:hover{transform:scale(1.1);opacity:1}
.tc-path .tc-path-end{align-items:center}
.tc-path-prev{background-image:none}
.tc-path-end{display:flex;flex-wrap:wrap;align-items:center;gap:var(--s2)}
.tc-path-prev{font-size:var(--fs-0);font-weight:700;text-decoration:none;color:var(--accent-text)}

/* ---- Digital Life library ---- */
.tc-library .tc-gstrip{display:none}
.tc-library .tc-cat{display:flex;flex-direction:column;gap:var(--s6)}
.tc-library .tc-cat[hidden]{display:none}
.tc-library .tc-card{margin-top:0}
.tc-library .tc-card.is-current,.tc-library .tc-cat .tc-card{display:flex}
.tc-tips{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.tc-tip{border-bottom:1px solid var(--line);padding-block:var(--s2);scroll-margin-top:96px}
.tc-tip-h{margin:0;font-size:var(--fs-2);display:flex;align-items:center;flex-wrap:wrap;gap:var(--s1)}
.tc-tip-btn{flex:1;display:flex;align-items:center;justify-content:space-between;gap:var(--s2);min-height:56px;padding:6px 0;border:0;background:none;color:var(--text);font:inherit;font-weight:700;text-align:left;cursor:pointer;line-height:1.25}
.tc-tip-btn i{flex:none;width:34px;height:34px;border-radius:50%;border:2px solid var(--accent);position:relative;transition:transform var(--d-panel,280ms) cubic-bezier(.2,.7,.2,1),background var(--d-ui,220ms) ease}
.tc-tip-btn i::before,.tc-tip-btn i::after{content:"";position:absolute;left:8px;top:14px;width:14px;height:2.5px;background:var(--accent);border-radius:2px}
.tc-tip-btn i::after{transform:rotate(90deg);transition:transform var(--d-panel,280ms) ease}
.tc-tip-btn[aria-expanded="true"] i::after{transform:rotate(0)}
.tc-tip-btn:hover{color:var(--accent-text)}
.tc-tip-glance{color:var(--muted);font-size:var(--fs-1);max-width:70ch}
.tc-tip-b{padding-top:var(--s2);display:flex;flex-direction:column;gap:var(--s2);max-width:70ch}
.tc-tip-b[hidden]:not([hidden="until-found"]){display:none}
.tc-tsteps{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:var(--s2);counter-reset:t}
.tc-tsteps li{position:relative;padding-left:52px;counter-increment:t;overflow-wrap:anywhere}
.tc-tsteps li::before{content:counter(t);position:absolute;left:0;top:0;width:36px;height:36px;border-radius:50%;border:2px solid var(--accent);display:grid;place-items:center;font-weight:700;color:var(--accent-text);font-size:var(--fs-0)}

/* ---- glossary list ---- */
.tc-gl{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--s3) var(--s5);margin:0}
.tc-gl > div{border-top:1px solid var(--line);padding-top:var(--s2);scroll-margin-top:96px}
.tc-gl dt{font-weight:700;font-size:var(--fs-1);color:var(--accent-text)}
.tc-gl dd{margin:4px 0 0;font-size:var(--fs-0);line-height:1.55}

/* ---- phone ---- */
@media (max-width:1100px){.tc-plist{grid-template-columns:repeat(2,minmax(0,1fr))}.tc-pcard:nth-child(even){margin-top:0}}
@media (max-width:960px){
  .tc-body{grid-template-columns:minmax(0,1fr)}
  .tc-cols,.tc-src-in,.tc-gl{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:760px){
  .tc-reader,.tc-paths,.tc-glossary{padding-block:var(--s6)}
  .tc-art-wide{display:none}.tc-art-narrow{display:block;position:static;aspect-ratio:auto}
  .tc-art-narrow svg{height:auto}
  .tc-cap{min-height:0;padding:var(--s2);font-size:1.125rem}
  .tc-ctl{padding:var(--s1) var(--s2);gap:6px}
  .tc-icon{width:44px;height:44px}
  .tc-tab{flex-basis:196px}
  .tc-plist{grid-template-columns:minmax(0,1fr)}
  .tc-gstrip,.tc-row{margin-inline:calc(var(--s2) * -1);padding-inline:var(--s2)}
  .tc-path{padding:var(--s2)}
  .tc-panel{padding:var(--s2)}
  .tc-step-no b{font-size:var(--fs-5)}
  .gl-pop{left:0!important;right:0;top:auto!important;bottom:0;width:100%;max-width:none;border-radius:var(--radius-lg) var(--radius-lg) 0 0;padding:var(--s3) var(--s3) calc(var(--s3) + env(safe-area-inset-bottom,0px))}
  html.js.mo .gl-pop.is-in{animation-name:gl-up}
  .tc-tip-h{font-size:var(--fs-1)}
}
@keyframes gl-up{from{transform:translateY(24px);opacity:0}to{transform:none;opacity:1}}
@media (prefers-reduced-motion:reduce){.tc-more,.tc-tab,.tc-gtab::after,.tc-all i,.tc-tip-btn i,.tc-parrow{transition:none}.gl-pop.is-in{animation:none!important}}
html.mo-off .tc-more,html.mo-off .tc-tab,html.mo-off .gl-pop.is-in{transition:none;animation:none}