/* Knowledge Mountain: an explorable landscape built from paper. */
body.km{--pine:#234c3f;--forest:#173c31;--rust:#b9563e;--cream:#f5f2e9;--km-ink:#263d35;--km-line:#dcded2;background:var(--cream);color:var(--km-ink)}
body.km [hidden]{display:none!important}
body.km .shell>.top,body.km .shell>.hero,body.km .shell>.mountain,body.km .shell>.pullDeck{display:none}
body.km .shell{max-width:1220px;padding-bottom:70px}
.km-header{height:76px;max-width:1380px;margin:auto;padding:0 48px;display:flex;justify-content:space-between;align-items:center;gap:20px;border-bottom:1px solid #34534015}
.km-brand{display:flex;align-items:center;gap:11px;color:var(--forest);text-decoration:none;font-weight:800;font-size:17px;letter-spacing:-.035em}
.km-emblem{width:35px;height:35px;background:var(--pine);color:#e7eacb;border-radius:50%;display:grid;place-items:center}
.km-brand small{display:block;font-size:9px;letter-spacing:.14em;font-weight:650;color:#788373;margin-top:1px}
.km-header-actions{display:flex;gap:18px;align-items:center}.km-book-label{font-size:11px;color:#778173}
.km-sound{display:flex;align-items:center;gap:8px}.km-sound button{display:flex;align-items:center;gap:6px;border:1px solid #ced4c6;background:#ffffff78;color:var(--pine);border-radius:99px;padding:8px 11px;font-size:11px;font-weight:750}.km-sound input{width:60px;accent-color:var(--pine)}
.km-intro{max-width:1180px;margin:0 auto;padding:41px 24px 0;display:flex;justify-content:space-between;gap:30px;align-items:end;position:relative;z-index:2}
.km-kicker{font-size:10px;letter-spacing:.2em;font-weight:800;color:#78816d;text-transform:uppercase;display:flex;gap:8px;align-items:center}.km-kicker:before{content:"";width:21px;height:1px;background:#91a07d}
.km-intro h1{font-family:Georgia,"Times New Roman",serif;font-size:clamp(46px,5.7vw,79px);line-height:.98;font-weight:400;letter-spacing:-.065em;margin:14px 0 4px}.km-intro h1 em{font-weight:400;color:var(--rust)}
.km-intro-copy{max-width:295px;padding-bottom:3px}.km-intro-copy p{color:#6b7567;font-size:13px;line-height:1.6;margin:0 0 12px}
.km-stat-row{display:flex;gap:16px;font-size:10px;color:#7b8373}.km-stat-row strong{font-weight:850;color:var(--pine);font-size:15px;margin-right:3px}
.km-experience{position:relative;max-width:1440px;margin:0 auto;padding-top:13px;isolation:isolate;overflow:hidden}
.km-experience:before{content:"";position:absolute;pointer-events:none;z-index:-1;width:850px;height:600px;top:-35px;left:50%;transform:translateX(-50%);background:radial-gradient(ellipse,#d9e4d1aa,transparent 67%)}
.km-experience:after{content:"";position:absolute;z-index:-1;left:4%;right:4%;top:140px;height:440px;border:1px solid #a6b79c18;border-radius:50%;transform:rotate(-7deg);box-shadow:0 0 0 28px #f5f2e9,0 0 0 29px #a6b79c15,0 0 0 60px #f5f2e9,0 0 0 61px #a6b79c12;pointer-events:none}
.km-mode{display:flex;align-items:center;justify-content:center;gap:3px;width:max-content;margin:15px auto 2px;padding:4px;border:1px solid #d9decd;border-radius:99px;background:#e9ecdf;position:relative;z-index:3}
.km-mode button{border:0;border-radius:99px;padding:9px 20px;background:none;color:#71806c;font-size:11px;font-weight:800;display:flex;align-items:center;gap:6px}.km-mode button[aria-selected=true]{background:#fffdf7;color:var(--pine);box-shadow:0 2px 7px #243d3010}
.km-viewport{width:100%;overflow-x:auto;overflow-y:hidden;scrollbar-width:thin;scrollbar-color:#bdc8ad transparent;position:relative;touch-action:pan-x pan-y;overscroll-behavior-x:contain}
.km-canvas{position:relative;margin:0 auto;min-width:100%}.km-pile{position:absolute;width:1200px;height:565px;top:0;left:0;transform-origin:0 0;will-change:transform}
.km-ground{position:absolute;width:1000px;height:80px;left:100px;top:463px;border-radius:50%;background:radial-gradient(ellipse,#324d3447,transparent 68%);filter:blur(12px);pointer-events:none}
.km-altitude{position:absolute;left:34px;top:250px;writing-mode:vertical-rl;transform:rotate(180deg);font-size:9px;letter-spacing:.19em;color:#8c977e;display:flex;align-items:center;gap:12px}.km-altitude:after{content:"";height:90px;width:1px;background:#a7b8955c}
.km-summit-flag{position:absolute;left:610px;top:14px;width:55px;height:35px;border-left:1px solid #7d8f6d;z-index:0}.km-summit-flag:after{content:"SUMMIT";font:800 8px system-ui;letter-spacing:1px;position:absolute;left:0;top:0;background:#b95e47;color:#fff8e6;padding:5px 8px;clip-path:polygon(0 0,100% 0,87% 50%,100% 100%,0 100%)}
.km-card{position:absolute;display:block;border:1px solid #c6c5ad80;border-radius:3px 4px 3px 5px;background:var(--paper-color,#fffaf0);width:112px;height:76px;padding:7px 8px;text-align:left;color:#3f5144;box-shadow:1px 2px 0 #c5c3ae,2px 4px 0 #f6f0dd,3px 6px 0 #c6c5b2,4px 9px 14px #34473325;transform:rotate(var(--angle));transition:transform .24s cubic-bezier(.2,.8,.2,1),box-shadow .24s,opacity .24s,filter .24s;cursor:pointer;transform-origin:50% 90%;outline-offset:4px;animation:km-settle .55s backwards;animation-delay:var(--delay);}
.km-card:before{content:"";position:absolute;left:6px;right:6px;top:19px;border-top:1px solid #7c8d7130}.km-card:after{content:"";position:absolute;right:6px;top:6px;width:4px;height:4px;background:var(--tab,#b97955);border-radius:50%}
.km-card .km-card-meta{font:600 5.7px/1 system-ui;letter-spacing:.55px;color:#7f8c72;text-transform:uppercase;display:block;white-space:nowrap;overflow:hidden;margin-bottom:9px}
.km-card strong{display:block;font:600 10.5px/1.13 Georgia,serif;max-height:25px;overflow:hidden;letter-spacing:-.15px}.km-card .km-card-mark{display:block;position:absolute;bottom:5px;left:8px;right:7px;font:italic 6.5px Georgia;color:#7a8b6c;overflow:hidden;white-space:nowrap}.km-card .km-card-scribble{position:absolute;bottom:7px;right:6px;width:20px;height:10px;opacity:.42;transform:rotate(-4deg)}
.km-card:hover,.km-card:focus-visible{z-index:900!important;transform:translateY(-24px) rotate(0deg) scale(1.22);box-shadow:0 22px 30px #24352642;filter:brightness(1.035)}
.km-card.is-muted{opacity:.12;filter:grayscale(1);pointer-events:none}.km-card.is-learned{border-color:#6a9870}.km-card.is-learned:after{background:#4e8b56;box-shadow:0 0 0 2px #76a76b25}.km-card.is-picked{opacity:.25}.km-card.is-saved:after{border-radius:0;transform:rotate(45deg);background:#b55e44}
/* Keep each exposed paper strip's hit area still while its sheet lifts. */
.km-card{background:transparent;border:0;border-radius:0;padding:0;box-shadow:none;transform:none;animation:none;transition:opacity .24s,filter .24s}
.km-card:before,.km-card:after{display:none}
.km-card-face{position:absolute;left:0;top:0;display:block;width:112px;height:76px;pointer-events:none;border:1px solid #c6c5ad80;border-radius:3px 4px 3px 5px;background:var(--paper-color,#fffaf0);padding:7px 8px;box-shadow:1px 2px 0 #c5c3ae,2px 4px 0 #f6f0dd,3px 6px 0 #c6c5b2,4px 9px 14px #34473325;transform:rotate(var(--angle));transform-origin:50% 90%;transition:transform .24s cubic-bezier(.2,.8,.2,1),box-shadow .24s;animation:km-settle .55s backwards;animation-delay:var(--delay)}
.km-card-face:before{content:"";position:absolute;left:6px;right:6px;top:19px;border-top:1px solid #7c8d7130}.km-card-face:after{content:"";position:absolute;right:6px;top:6px;width:4px;height:4px;background:var(--tab,#b97955);border-radius:50%}
.km-card:hover,.km-card:focus-visible{transform:none;box-shadow:none}
.km-card:hover .km-card-face,.km-card:focus-visible .km-card-face{transform:translateY(-24px) rotate(0deg) scale(1.22);box-shadow:0 22px 30px #24352642}
.km-card.is-learned .km-card-face{border-color:#6a9870}.km-card.is-learned .km-card-face:after{background:#4e8b56;box-shadow:0 0 0 2px #76a76b25}.km-card.is-saved .km-card-face:after{border-radius:0;transform:rotate(45deg);background:#b55e44}
@keyframes km-settle{from{opacity:0;transform:translateY(-28px) rotate(calc(var(--angle) + 5deg))}to{opacity:1;transform:rotate(var(--angle))}}
.km-field-label{position:absolute;top:545px;font-size:9px;letter-spacing:.2em;text-transform:uppercase;color:#849176}.km-field-label.left{left:135px}.km-field-label.right{right:115px}.km-field-label b{font-family:Georgia;font-style:italic;font-weight:400;font-size:13px;text-transform:none;letter-spacing:0;color:#a7704d;margin-right:8px}
.km-controls{max-width:1130px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:3px 14px 18px;gap:12px;position:relative;z-index:2}.km-filters{display:flex;gap:5px;align-items:center;flex-wrap:wrap}.km-filters button{font-size:10px;padding:7px 10px;border-radius:99px;background:#fffdf650;color:#75816e;border:1px solid transparent}.km-filters button[aria-pressed=true]{background:var(--pine);color:#fff9e6}.km-filters button:hover{border-color:#bdc9b1}.km-tools{display:flex;align-items:center;gap:8px}.km-zoom{display:flex;align-items:center;gap:6px;font-size:10px;color:#7b8771}.km-zoom input{width:67px;accent-color:var(--pine)}
.km-draw{border:0;background:var(--rust);color:#fff8e9;border-radius:8px;padding:11px 15px;font-size:11px;font-weight:800;box-shadow:0 4px 0 #8a3e2b18;display:flex;align-items:center;gap:9px;white-space:nowrap}.km-draw:hover{background:#a74d37}.km-draw:active{transform:translateY(2px)}
.km-hint{text-align:center;margin:0 0 22px;font-size:11px;color:#8a927e}.km-hint kbd{font:9px system-ui;border:1px solid #d7dccb;border-radius:3px;padding:1px 4px;background:#fdfbf4;color:#68765e}
.km-empty{display:none;position:absolute;left:50%;top:150px;transform:translateX(-50%);width:300px;text-align:center;padding:30px;background:#fffdf6;border:1px solid #d4dcc8;border-radius:15px;z-index:1000;color:#6d795f;font-size:13px}
.km-trail{max-width:1040px;margin:25px auto 45px;min-height:470px;padding:0 24px}.km-trail[hidden]{display:none}.km-route-track{display:flex;gap:0;overflow-x:auto;padding:18px 4px 26px;scrollbar-width:thin}.km-route-track button{position:relative;flex:0 0 49px;width:49px;height:37px;border:0;background:transparent;color:#8b987d;font-size:11px;font-weight:750}.km-route-track button:before{content:"";position:absolute;top:18px;left:0;width:100%;height:1px;background:#cbd4be;z-index:-1}.km-route-track button span{display:grid;place-items:center;width:30px;height:30px;background:#f0f0e4;border:1px solid #cbd4be;border-radius:50%;margin:auto}.km-route-track button.selected span{background:var(--pine);color:#f5f6dd;border-color:var(--pine)}.km-route-track button.done span{background:#d7e5bb;color:#3d623e}.km-route-track button.selected.done span{box-shadow:0 0 0 3px #d7e5bb}
.km-route-paper{max-width:780px;margin:auto;position:relative;padding:35px 40px 30px;background:#fffdf5;border:1px solid #d5d5bf;border-radius:8px;box-shadow:5px 5px 0 #e2dfca,8px 8px 0 #eeead9,11px 11px 22px #2d462b15;transform:rotate(-.4deg)}.km-route-paper h2{font:400 38px/1.1 Georgia,serif;letter-spacing:-.04em;margin:15px 0}.km-route-paper p{max-width:580px;font-size:14px;color:#6b785f}.km-route-buttons{display:flex;gap:8px;flex-wrap:wrap;margin-top:20px}.km-small-btn{border:1px solid #cbd3bf;border-radius:7px;padding:9px 13px;background:#fafaf0;color:#45623f;font-size:11px;font-weight:750}.km-route-foot{display:flex;align-items:center;justify-content:space-between;margin-top:25px;border-top:1px dashed #d9ddca;padding-top:15px;font-size:11px;color:#8b947c}
body.km .nav{margin-top:4px;border-top:1px solid var(--km-line);border-bottom:1px solid var(--km-line);padding-top:5px;gap:8px}body.km .nav button{font-size:12px;padding:14px 14px;border-bottom-width:2px}body.km .head h2{font-family:Georgia;font-weight:400;font-size:33px}body.km .unit,body.km .focus,body.km .chapter,body.km .question,body.km .flashCard,body.km .memoryCard{background:#fffdf6;border-color:#dcdecd}body.km .head .pill{background:#e5ead7}body.km #home>.focus:last-of-type{display:none}
.km-dialog{border:0;background:none;padding:26px;max-width:none;max-height:95dvh;width:min(650px,calc(100vw - 20px));margin:auto;overflow:visible;color:var(--km-ink)}.km-dialog::backdrop{background:#152b25a8;backdrop-filter:blur(8px)}
.km-note-sheet{position:relative;max-height:84dvh;overflow:auto;padding:35px 40px 25px;background:#fffdf3;border:1px solid #d3d2b9;border-radius:4px 12px 6px 8px;box-shadow:4px 5px 0 #d9d7bb,8px 9px 0 #f7f0d9,0 34px 90px #06160f70;scrollbar-width:thin;transform:rotate(-.45deg);background-image:repeating-linear-gradient(0deg,transparent,transparent 29px,#64895606 29px,#64895606 30px)}
.km-note-sheet:before{content:"";position:absolute;left:16px;top:0;bottom:0;border-left:1px solid #cf9b7c32;pointer-events:none}.km-note-type{font-size:9px;letter-spacing:.17em;font-weight:800;text-transform:uppercase;color:#85906c;padding-right:20px}.km-note-type b{color:#a76443}.km-note-sheet h2{font:400 34px/1.13 Georgia,serif;letter-spacing:-.04em;margin:17px 0;color:#294b37}.km-note-sheet p{font-size:14px;line-height:1.7;color:#576750}.km-note-sheet .km-question{font-size:15px;line-height:1.55;font-weight:650;color:#354f3b}.km-note-close{position:absolute;right:33px;top:32px;border:1px solid #c4ccb5;background:#fffdf3;color:#5c7051;border-radius:50%;width:29px;height:29px;font-size:20px;line-height:1;z-index:2}.km-note-meta{display:flex;align-items:center;gap:8px;margin:17px 0 3px;font-size:10px;color:#9b9e89}.km-note-meta span{border:1px solid #d8ddc8;border-radius:99px;padding:3px 7px}.km-note-input{width:100%;background:#f8f8ec;border:1px solid #d5dbc4;border-radius:6px;min-height:68px;padding:10px 12px;font:13px/1.5 system-ui;color:#4b6245;resize:vertical}.km-note-answer{margin-top:19px;padding:16px 18px;border:1px solid #cfd9bb;border-radius:6px;background:#eef4e1}.km-note-answer[hidden]{display:none}.km-note-answer h3{font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:#507141;margin:0 0 5px}.km-note-answer p{margin:3px 0 11px;font-size:13px;line-height:1.6}.km-memory-hook{border-left:2px solid #ba7850;padding-left:12px;color:#836d4b;font:italic 14px/1.5 Georgia;margin-top:12px}.km-note-actions{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:23px;padding-top:15px;border-top:1px dashed #d0d7bf}.km-note-secondary{display:flex;gap:5px}.km-note-secondary button{border:0;border-radius:6px;padding:8px 10px;background:#edf0df;color:#5d724d;font-size:10px;font-weight:700}.km-note-secondary button[aria-pressed=true]{background:#d4e4b9;color:#36572c}.km-read-more{border:0;background:none;color:#9b6a45;font-size:10px;text-decoration:underline;text-underline-offset:3px;cursor:pointer;margin-top:13px;padding:2px 0}.km-note-nudge{font-size:10px;color:#8d967f;text-align:center;margin:17px 0 0}
.km-particle{position:fixed;z-index:2000;width:5px;height:7px;background:#d6ab63;pointer-events:none;border-radius:1px}.km-toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);z-index:2500;padding:10px 17px;background:#1d4335;color:#f8f7de;box-shadow:0 5px 20px #173a3030;border-radius:99px;font-size:12px;opacity:0;pointer-events:none;transition:opacity .2s}.km-toast.visible{opacity:1}
:focus-visible{outline:2px solid #bd7445;outline-offset:4px}
@media(min-width:1450px){.km-intro{padding-top:50px}.km-experience{padding-top:20px}}
@media(max-width:850px){.km-header{padding:0 24px}.km-intro{padding-top:30px}.km-intro-copy{max-width:240px}.km-controls{flex-wrap:wrap;justify-content:center}.km-zoom{display:none}.km-note-sheet{padding:30px 28px 24px}.km-note-sheet h2{font-size:30px}.km-book-label{display:none}}
@media(max-width:600px){.km-header{height:65px;padding:0 17px}.km-brand{font-size:15px}.km-brand small{font-size:7px}.km-sound input{width:40px}.km-sound button{font-size:0;padding:8px}.km-sound svg{width:15px;height:15px}.km-intro{display:block;padding:28px 22px 0}.km-intro h1{font-size:53px;margin-top:12px;max-width:360px}.km-intro-copy{max-width:330px;margin-top:17px}.km-intro-copy p{font-size:12px;margin-bottom:8px}.km-stat-row{font-size:9px;gap:17px}.km-intro-copy strong{font-size:13px}.km-experience{padding-top:12px}.km-mode{margin-top:10px}.km-mode button{font-size:10px;padding:8px 16px}.km-controls{padding:5px 12px 12px;gap:13px}.km-filters{justify-content:center;gap:3px}.km-filters button{font-size:9px;padding:6px 9px}.km-tools{justify-content:center}.km-hint{font-size:9px;padding:0 15px}.km-hint kbd{display:none}.km-dialog{padding:13px;width:calc(100vw - 8px)}.km-note-sheet{padding:29px 22px 20px;max-height:87dvh}.km-note-close{top:20px;right:20px}.km-note-sheet h2{font-size:28px;padding-right:10px}.km-note-sheet p{font-size:13px}.km-note-actions{align-items:flex-start;flex-wrap:wrap}.km-note-actions>.km-draw{font-size:10px;padding:9px 12px}.km-note-secondary button{padding:9px 9px}.km-note-type{font-size:8px}.km-route-paper{padding:25px 22px}.km-route-paper h2{font-size:29px}.km-route-foot{gap:9px}.km-trail{padding:0 18px}.km-note-meta{font-size:9px}}
@media(prefers-reduced-motion:reduce){.km-card,.km-card-face{animation:none;transition:none}.km-card:hover .km-card-face,.km-card:focus-visible .km-card-face{transform:rotate(0);box-shadow:0 6px 12px #24352630}.km-pile{will-change:auto}*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}