/* Keep the instruction in the existing footer, without reducing the prose area. */
.subfooter #hint{display:block;flex:1;min-width:0;text-align:right;font-size:10px;line-height:1.5;letter-spacing:0;color:#bfc1b8;white-space:nowrap}
.subfooter #sources{flex-shrink:0}.sources-short{display:none}
.subfooter #loadStatus:empty{display:none}
/* Full viewport coach marks: explicitly reset the generic right-hand drawer geometry. */
#readerTutorial{position:fixed;inset:0;margin:0;width:100%;max-width:none;height:100dvh;max-height:none;padding:0;border:0;border-radius:0;background:transparent;color:var(--ivory);box-shadow:none;overflow:hidden;overscroll-behavior:contain}
#readerTutorial::backdrop{background:transparent;backdrop-filter:none}
body.reader-tutorial-active #drawer{visibility:hidden}
.tutorial-spot{position:absolute;border:2px solid var(--gold);border-radius:10px;box-shadow:0 0 0 200vmax #080e14b8;pointer-events:none}
.tutorial-card{position:absolute;left:50%;transform:translateX(-50%);box-sizing:border-box;width:min(420px,calc(100% - 24px));padding:18px 20px;border:1px solid var(--gold);border-radius:16px;background:#1b2427;color:var(--ivory);box-shadow:0 12px 40px #0005;overflow-y:auto;overscroll-behavior:contain}
.tutorial-gesture{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:grid;place-items:center;width:44px;height:64px;border-radius:24px;background:#162321dd;color:#f0d598;font:38px Georgia;text-shadow:0 1px 4px #000;animation:tutorial-gesture 1.8s ease-in-out infinite}
@keyframes tutorial-gesture{0%,100%{transform:translate(-50%,-65%)}50%{transform:translate(-50%,-35%)}}
@media(prefers-reduced-motion:reduce){.tutorial-gesture{animation:none}}
.tutorial-top{display:flex;align-items:center;justify-content:space-between;gap:12px;font:12px var(--serif);color:var(--gold)}
.tutorial-top button{min-height:44px;padding:8px;color:var(--ivory);text-decoration:underline;text-underline-offset:4px}
#readerTutorial h2{font:500 19px/1.5 var(--serif);margin:8px 0 10px}
#readerTutorial p{font:14px/1.8 var(--serif);margin:0 0 16px}
.tutorial-actions{display:flex;gap:12px;justify-content:space-between}
.tutorial-actions button{min-height:46px;padding:10px 20px;border:1px solid var(--line);border-radius:25px;font-size:14px}
.tutorial-actions .tutorial-next{background:var(--gold);color:#171c22;border-color:var(--gold)}
/* Two quiet, equal tools follow the introduction and precede the chapters. */
.contents-tools{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:22px 0 30px}
.contents-tools button{display:flex;justify-content:center;align-items:center;gap:9px;min-height:48px;padding:10px 12px;border:1px solid #a18c5e66;border-radius:999px;background:transparent;color:#454d43;font:12px/1.5 var(--serif);transition:background .15s,border-color .15s}
.contents-tools button svg{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round;color:#8b7548}
.contents-tools button:hover{background:#c7ac771a;border-color:#a18c5e;color:#29352b}
.contents-tools button:focus-visible{outline:2px solid #807044;outline-offset:3px}
@media(max-width:760px){
 .subfooter{gap:7px}
 .subfooter #hint{font-size:clamp(8px,2.2vw,10px);max-width:none;margin-left:auto;white-space:nowrap}
 .subfooter #sources{font-size:9px;letter-spacing:0}
 .sources-full{display:none}.sources-short{display:inline}
 .contents-tools{gap:10px;margin:18px 0 25px}
 .contents-tools button{font-size:12px;padding:9px 8px}
}

/* Native disclosures keep touch and keyboard operation consistent. */
details.catalog-part{margin:0;border-bottom:1px solid #7774}
details.catalog-part:first-of-type{border-top:1px solid #7774}
.catalog-part>summary{display:flex;align-items:center;gap:12px;min-height:66px;padding:18px 0;list-style:none;cursor:pointer;color:#343d33;font-size:18px;-webkit-tap-highlight-color:transparent}
.catalog-part>summary::-webkit-details-marker{display:none}
.catalog-part>summary .part-range{margin-left:auto;font-size:10px;color:#787768;white-space:nowrap}
.part-chevron{width:18px;height:18px;flex:none;fill:none;stroke:#8b7548;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.catalog-part[open]>summary .part-chevron{transform:rotate(180deg)}
.catalog-part>summary:focus-visible{outline:2px solid #8b7548;outline-offset:3px}
.catalog-chapters{padding-bottom:16px}
@media(max-width:400px){.catalog-part>summary{font-size:16px;gap:8px}.catalog-part>summary .part-range{font-size:9px}}

.tutorial-spot[data-step="1"] .tutorial-gesture{animation-name:tutorial-swipe}
.tutorial-spot[data-step="2"] .tutorial-gesture,.tutorial-spot[data-step="3"] .tutorial-gesture{animation:none}
@keyframes tutorial-swipe{0%,100%{transform:translate(-70%,-50%)}50%{transform:translate(-30%,-50%)}}
@media(prefers-reduced-motion:reduce){.tutorial-spot .tutorial-gesture{animation:none}}

/* Tutorial card: pin actions to the bottom so Next button is always visible even when the card's dynamic maxHeight is small. */
.tutorial-card{display:flex;flex-direction:column}
.tutorial-card .tutorial-top,.tutorial-card h2,.tutorial-card p{flex-shrink:0}
.tutorial-card p{overflow-y:auto;min-height:0;flex:1 1 auto}
.tutorial-actions{position:sticky;bottom:-18px;flex-shrink:0;margin:12px -20px -18px;padding:12px 20px 18px;background:#1b2427;box-shadow:0 -8px 12px -4px #1b2427;z-index:2}