.acct[data-v-c16446de]{position:fixed;top:14px;right:16px;z-index:62}.acct-chip[data-v-c16446de]{display:flex;align-items:center;gap:9px;font:inherit;cursor:pointer;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:5px 12px 5px 5px;box-shadow:var(--shadow);color:var(--ink);transition:.15s}.acct-chip[data-v-c16446de]:hover{border-color:var(--accent)}.acct-chip.ghost[data-v-c16446de]{padding:8px 15px;font-weight:600;color:var(--accent-d)}.acct-avatar[data-v-c16446de]{width:30px;height:30px;border-radius:50%;flex:none;background:linear-gradient(135deg,var(--accent),var(--accent-d));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.95rem}.acct-name[data-v-c16446de]{font-weight:600;font-size:.92rem;max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.acct-caret[data-v-c16446de]{font-size:.7rem;color:var(--ink-soft);transition:transform .2s}.acct-caret.up[data-v-c16446de]{transform:rotate(180deg)}.acct-menu[data-v-c16446de]{position:absolute;top:calc(100% + 8px);right:0;min-width:230px;background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:0 12px 30px -12px #3c281466;overflow:hidden;padding:6px;animation:acct-pop-c16446de .16s ease}@keyframes acct-pop-c16446de{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}.acct-head[data-v-c16446de]{padding:10px 12px 12px;border-bottom:1px solid var(--line);margin-bottom:6px}.acct-head-name[data-v-c16446de]{font-weight:700}.acct-head-mail[data-v-c16446de]{font-size:.82rem;color:var(--ink-soft);overflow:hidden;text-overflow:ellipsis}.acct-item[data-v-c16446de]{display:block;width:100%;text-align:left;font:inherit;cursor:pointer;background:none;border:none;border-radius:9px;padding:10px 12px;color:var(--ink);transition:.12s}.acct-item[data-v-c16446de]:hover{background:var(--paper2)}.acct-item.danger[data-v-c16446de]{color:var(--accent-d)}@media (max-width: 600px){.acct[data-v-c16446de]{top:10px;right:10px}.acct-name[data-v-c16446de]{display:none}.acct-chip[data-v-c16446de]{padding:4px}}:root{--paper:#f3ede1;--paper2:#ece3d3;--card:#fbf7ef;--ink:#2a2620;--ink-soft:#6b6256;--line:#ded2bd;--accent:#bf552f;--accent-d:#9c421f;--green:#3a6b54;--green-bg:#e3efe6;--red:#b23a32;--red-bg:#f6e3e0;--gold:#c79a3a;--side-w:288px;--shadow:0 1px 0 rgba(0,0,0,.04), 0 10px 30px -18px rgba(60,40,20,.45)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Hanken Grotesk,system-ui,sans-serif;background:radial-gradient(1200px 500px at 80% -10%,#f7f1e5 0%,transparent 60%),var(--paper);color:var(--ink);line-height:1.55;min-height:100dvh;-webkit-font-smoothing:antialiased}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:0;background-image:radial-gradient(rgba(120,90,50,.05) 1px,transparent 1px);background-size:4px 4px;mix-blend-mode:multiply}em{font-style:italic;color:var(--accent)}.kicker{font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;color:var(--accent-d);font-weight:600}.mono{font-family:Fraunces,serif;font-style:italic}sup{font-size:.72em}.land-wrap{max-width:880px;margin:0 auto;padding:60px 22px;position:relative;z-index:1}.land-head h1{font-family:Fraunces,serif;font-weight:600;font-size:clamp(2.3rem,6vw,3.6rem);line-height:1.04;margin:.2em 0}.land-head .sub{color:var(--ink-soft);max-width:54ch}.subjects{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin-top:34px}.subject-card{display:flex;flex-direction:column;gap:8px;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px;text-decoration:none;color:inherit;box-shadow:var(--shadow);transition:.2s}.subject-card:hover{transform:translateY(-3px);border-color:var(--accent)}.subject-card.soon{opacity:.55;border-style:dashed}.sc-badge{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-d);font-weight:700;background:#f6e7da;border:1px solid #e8cdb6;padding:3px 9px;border-radius:999px;align-self:flex-start}.sc-title{font-family:Fraunces,serif;font-weight:600;font-size:1.45rem;line-height:1.15}.sc-desc{color:var(--ink-soft);font-size:.95rem}.sc-ready{display:flex;flex-direction:column;gap:5px;margin-top:4px}.ready-bar.mini{height:8px;margin:0}.sc-ready-pct{font-size:.82rem;color:var(--ink-soft);font-weight:600}.sc-go{color:var(--accent-d);font-weight:700;margin-top:6px}.land-sync{margin-top:28px}.land-foot{margin-top:48px;color:var(--ink-soft);font-size:.9rem;text-align:center}.burger{position:fixed;top:14px;left:14px;z-index:60;width:42px;height:42px;border-radius:12px;background:var(--card);border:1px solid var(--line);cursor:pointer;box-shadow:var(--shadow);display:flex;flex-direction:column;justify-content:center;align-items:center;gap:4px}.burger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}.burger:hover span{background:var(--accent)}.sidebar{position:fixed;top:0;left:0;bottom:0;width:var(--side-w);z-index:50;background:linear-gradient(180deg,#2e2a23,#262219);color:#efe7d6;display:flex;flex-direction:column;transform:translate(0);transition:transform .28s cubic-bezier(.2,.8,.2,1);box-shadow:6px 0 28px -18px #28190a99}body.side-closed .sidebar{transform:translate(-100%)}.side-head{padding:22px 22px 14px 66px}.side-kicker{font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;color:#c89a6e;font-weight:600}.side-title{font-family:Fraunces,serif;font-size:1.5rem;font-weight:600;color:#f4ede0}.side-title em{color:#e08a5a}.side-nav{flex:1;overflow-y:auto;padding:6px 12px 12px;scrollbar-width:thin}.snav-group{font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:#a39377;font-weight:700;padding:16px 10px 6px}.snav-item{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:10px;color:#e9dfca;text-decoration:none;font-size:.95rem;font-weight:500;transition:.15s;position:relative}.snav-item:hover{background:#ffffff0f}.snav-item.on{background:#bf552f;color:#fff}.snav-item.on .snav-count{color:#ffd9c4}.snav-dot{width:8px;height:8px;border-radius:50%;background:#54493a;flex:none}.snav-dot.started{background:var(--gold)}.snav-dot.done{background:#6fbe92}.snav-count{margin-left:auto;font-size:.74rem;color:#a39377;font-variant-numeric:tabular-nums}.snav-badge{margin-left:auto;font-size:.72rem;font-weight:700;background:var(--accent);color:#fff;border-radius:999px;padding:1px 8px;min-width:20px;text-align:center}.side-foot{padding:14px 18px;border-top:1px solid rgba(255,255,255,.08)}.sp-bar{height:8px;background:#ffffff1a;border-radius:999px;overflow:hidden;margin-bottom:6px}.sp-bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--gold),#e08a5a);transition:width .5s}.side-progress span{font-size:.78rem;color:#a39377}.sync-status{margin-top:10px;font-size:.8rem;display:flex;align-items:center;gap:8px;flex-wrap:wrap}.sync-btn{font:inherit;font-size:.8rem;font-weight:600;cursor:pointer;background:#ffffff14;border:1px solid rgba(255,255,255,.18);color:#e9dfca;border-radius:8px;padding:6px 10px;width:100%;text-align:left}.sync-btn:hover{background:#ffffff24}.sync-ok{color:#8fd3ad}.sync-warn{color:#d8b48f}.sync-link{font:inherit;font-size:.74rem;background:none;border:none;color:#a39377;cursor:pointer;text-decoration:underline;padding:0}.scrim{position:fixed;top:0;right:0;bottom:0;left:0;background:#1e160c73;z-index:40;opacity:0;pointer-events:none;transition:.25s}.main{margin-left:var(--side-w);padding:34px clamp(18px,4vw,52px) 170px;max-width:calc(var(--side-w) + 1020px);position:relative;z-index:1;transition:margin .28s cubic-bezier(.2,.8,.2,1)}@media (min-width:900px){body.side-closed .main{margin-left:0;max-width:1020px;padding-left:clamp(70px,8vw,90px)}}@media (max-width:899px){.main{margin-left:0;max-width:none;padding:62px 14px 130px}body:not(.side-closed) .scrim{opacity:1;pointer-events:auto}.sidebar{max-width:86vw}}.page-head{padding:8px 0 20px}.page-head h1{font-family:Fraunces,serif;font-weight:600;font-size:clamp(1.9rem,4.5vw,2.7rem);line-height:1.05;letter-spacing:-.01em;margin:.18em 0 .2em}.page-head .sub{color:var(--ink-soft);max-width:62ch}.panel{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);margin-top:14px;overflow:hidden}.explain{padding:18px 24px 20px}.explain p{margin:.55em 0;color:#3d362c}.explain ul{margin:.4em 0 .4em 1.1em}.explain li{margin:.3em 0}.explain-panel summary{cursor:pointer;padding:15px 24px;font-weight:700;font-size:1.02rem;list-style:none;-webkit-user-select:none;user-select:none}.explain-panel summary::-webkit-details-marker{display:none}.explain-panel summary:after{content:"⌄";float:right;transition:.2s;color:var(--accent-d)}.explain-panel[open] summary:after{transform:rotate(180deg)}.explain-panel[open] summary{border-bottom:1px solid var(--line)}.rule{background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:8px;padding:11px 14px;margin:12px 0;font-size:1rem}.rule .lbl,.immo .lbl{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;font-weight:700;display:block;margin-bottom:3px}.rule .lbl{color:var(--accent-d)}.immo{background:var(--green-bg);border:1px solid #bcd9c6;border-left:4px solid var(--green);border-radius:8px;padding:11px 14px;margin:12px 0}.immo .lbl{color:var(--green)}.wozu{background:linear-gradient(135deg,#fdf6e4,#faefd2);border:1px solid #e8d5a3;border-left:4px solid var(--gold);border-radius:10px;padding:13px 16px;margin:4px 0 16px;font-size:1.02rem;line-height:1.6}.wozu .lbl{font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;font-weight:700;display:block;margin-bottom:5px;color:#9a7420}.wozu i{color:var(--accent-d)}.ex{padding:20px 24px 24px}.ex-top{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:12px}.ex-top .label{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft);font-weight:700}.ex-score{font-size:.85rem;color:var(--ink-soft)}.ex-score b{color:var(--green)}.question{font-size:1.35rem;font-family:Fraunces,serif;line-height:1.35;margin:6px 0 16px}.question.small{font-size:1.1rem;margin-bottom:8px}.answer-row{display:inline-flex;gap:10px;flex-wrap:wrap;align-items:center}input.num{font:inherit;font-size:1.12rem;padding:10px 14px;border:2px solid var(--line);border-radius:11px;background:#fff;width:210px;font-variant-numeric:tabular-nums;transition:.15s}input.num:focus{outline:none;border-color:var(--accent)}.unit{color:var(--ink-soft);font-size:.95rem}.choices{display:grid;grid-template-columns:1fr 1fr;gap:10px;width:100%}@media (max-width:620px){.choices{grid-template-columns:1fr}}.choice{font:inherit;text-align:left;cursor:pointer;background:#fff;border:2px solid var(--line);border-radius:12px;padding:11px 15px;font-size:1rem;transition:.15s;color:inherit}.choice:hover{border-color:var(--accent)}.choice[aria-pressed=true]{border-color:var(--ink);background:var(--paper)}.choice.correct{border-color:var(--green);background:var(--green-bg)}.choice.wrong{border-color:var(--red);background:var(--red-bg)}.btn{font:inherit;font-weight:600;cursor:pointer;border:none;border-radius:11px;padding:11px 20px;font-size:1rem;transition:.15s;text-decoration:none;display:inline-block}.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 18px -10px var(--accent)}.btn-primary:hover{background:var(--accent-d)}.btn-ghost{background:transparent;color:var(--ink);border:2px solid var(--line)}.btn-ghost:hover{border-color:var(--ink)}.btn:disabled{opacity:.4;cursor:default}.controls{margin-top:16px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}.hintline{margin-top:12px;font-size:.9rem}.hintline button{background:none;border:none;color:var(--accent-d);font:inherit;font-weight:600;cursor:pointer;text-decoration:underline;padding:0}.hint-text{display:none;margin-top:6px;font-size:.93rem;color:#5a5044;background:var(--paper);border-radius:8px;padding:9px 12px;border:1px solid var(--line)}.hint-text.show{display:block}.feedback{margin-top:16px;border-radius:12px;padding:14px 16px;display:none;font-size:1rem;animation:pop .3s ease}.feedback.show{display:block}.feedback.ok{background:var(--green-bg);border:1px solid #bcd9c6;color:#234a38}.feedback.no{background:var(--red-bg);border:1px solid #e9c3bd;color:#7a2a24}.feedback .ftitle{font-weight:700;font-family:Fraunces,serif;font-size:1.08rem}.feedback .sol{margin-top:8px;color:#3d362c}.feedback details summary{cursor:pointer;font-size:.88rem;color:var(--accent-d);margin-top:4px}@keyframes pop{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.sol-step{display:flex;gap:10px;align-items:flex-start;margin:7px 0}.sol-num{flex:none;width:22px;height:22px;border-radius:50%;background:var(--paper2);border:1px solid var(--line);color:var(--accent-d);font-size:.78rem;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:2px}.viz{margin-top:14px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px}.viz-cap{font-size:.85rem;color:var(--ink-soft);font-weight:600;margin-bottom:8px}.viz-table{width:100%;border-collapse:collapse;font-size:.92rem;font-variant-numeric:tabular-nums}.viz-table th{text-align:left;font-size:.74rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft);border-bottom:1px solid var(--line);padding:4px 8px}.viz-table td{padding:5px 8px;border-bottom:1px dashed var(--line)}.viz-table tr:last-child td{border-bottom:none}.viz-table .rowhead{font-weight:600;color:var(--accent-d)}.pbar{height:26px;background:var(--paper2);border:1px solid var(--line);border-radius:8px;overflow:hidden}.pbar-fill{height:100%;background:linear-gradient(90deg,var(--gold),var(--accent));border-radius:7px 0 0 7px;min-width:6px;transition:width .5s}.pbar-lbl{display:flex;justify-content:space-between;gap:10px;font-size:.82rem;color:var(--ink-soft);margin-top:5px;flex-wrap:wrap}.timeline{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.plot{width:100%;max-width:420px;height:auto;display:block;background:#fffdf8;border-radius:8px}.plot text{font-family:Hanken Grotesk,sans-serif;font-size:11px;fill:#6b6256}.plot .ax{stroke:#a99a86;stroke-width:1}.plot .curve{stroke:var(--accent);stroke-width:2.5;fill:none;stroke-linecap:round}.plot .curve2{stroke:var(--green);stroke-width:2;fill:none;stroke-dasharray:6 4}.plot .area{fill:#bf552f38;stroke:none}.plot .mark{fill:var(--green);stroke:#fff;stroke-width:1.5}.plot .mlb{font-weight:700;font-size:12px;fill:#234a38}.plot .tri{stroke:var(--green);stroke-width:1.5;stroke-dasharray:4 3;fill:none}.plot .tlb{font-weight:700;fill:#3a6b54;font-size:12px}.plot .bar{fill:#d8a276}.plot .bar-hi{fill:var(--accent)}.plot .blb{font-size:10px;fill:#6b6256}.viz-row{display:flex;gap:14px;flex-wrap:wrap}.viz-row .viz{flex:1;min-width:260px}.tl-item{display:flex;flex-direction:column;align-items:center;gap:2px}.tl-coin{font-size:1.3rem}.tl-y{font-size:.74rem;color:var(--ink-soft)}.home-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px;margin-top:6px}.home-card{display:flex;flex-direction:column;gap:6px;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;text-decoration:none;color:inherit;box-shadow:var(--shadow);transition:.18s}.home-card:hover{transform:translateY(-3px);border-color:var(--accent)}.hc-emoji{font-size:1.6rem}.hc-title{font-family:Fraunces,serif;font-weight:600;font-size:1.25rem}.hc-desc{color:var(--ink-soft);font-size:.92rem}.chap-nav{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}.chap-pill{font:inherit;font-size:.85rem;font-weight:600;cursor:pointer;border:1px solid var(--line);background:var(--card);border-radius:999px;padding:7px 14px;transition:.15s;color:var(--ink-soft)}.chap-pill:not(:disabled):hover{border-color:var(--accent);color:var(--ink)}.chap-pill.on{background:var(--ink);border-color:var(--ink);color:#f4ede0}.chap-pill.done:not(.on){color:var(--green);border-color:#bcd9c6;background:var(--green-bg)}.chap-pill:disabled{opacity:.45;cursor:default}.story-intro{font-size:1.05rem;color:#3d362c;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:6px}.story-lead{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:12px 15px;margin-bottom:12px}.story-step{padding:16px 0;border-bottom:1px dashed var(--line)}.story-step:last-child{border-bottom:none}.done-step{opacity:.88}.story-outro{padding:18px 0 4px;font-size:1.05rem}.exam-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap}.exam-clock{font-family:Fraunces,serif;font-size:2rem;font-weight:600;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:8px 18px;box-shadow:var(--shadow);font-variant-numeric:tabular-nums}.exam-clock.low{color:var(--red);border-color:var(--red)}.exam-rules{margin:.5em 0 .5em 1.2em}.exam-rules li{margin:.35em 0}.exam-best{margin-top:10px;color:var(--ink-soft)}.exam-task.t-ok{border-left:4px solid var(--green)}.exam-task.t-no{border-left:4px solid var(--red)}.result-bar{position:relative;height:14px;background:var(--paper2);border:1px solid var(--line);border-radius:999px;overflow:hidden;margin:10px 0 6px}.result-bar i{display:block;height:100%}.result-bar i.ok{background:linear-gradient(90deg,var(--gold),var(--green))}.result-bar i.no{background:linear-gradient(90deg,var(--gold),var(--red))}.result-mark{position:absolute;left:50%;top:0;bottom:0;width:2px;background:var(--ink-soft)}#mascot{position:fixed;right:16px;bottom:10px;z-index:35;width:170px;pointer-events:none;display:flex;flex-direction:column;align-items:flex-end;gap:6px}#mascot .snail{width:150px;height:118px;display:block;pointer-events:auto;cursor:pointer;filter:drop-shadow(0 6px 10px rgba(60,40,20,.25))}.m-bubble{pointer-events:none;background:var(--card);border:1.5px solid var(--line);border-radius:14px 14px 3px;padding:10px 13px;font-size:.9rem;line-height:1.45;color:var(--ink);box-shadow:var(--shadow);max-width:230px;opacity:0;transform:translateY(8px) scale(.92);transition:.25s cubic-bezier(.2,.8,.2,1)}.m-bubble.show{opacity:1;transform:none}@media (max-width:760px){#mascot{width:104px;right:8px;bottom:6px}#mascot .snail{width:92px;height:73px}.m-bubble{font-size:.8rem;max-width:170px}}#m-all{transform-origin:90px 130px;animation:m-bob 3.4s ease-in-out infinite}#m-shell{transform-origin:72px 72px}#m-lids{transform-origin:144px 29px;transform:scaleY(0);animation:m-blink 4.6s infinite}#m-zzz,#m-confetti .cf{opacity:0}@keyframes m-bob{0%,to{transform:translateY(0)}50%{transform:translateY(-4px)}}@keyframes m-blink{0%,91%,to{transform:scaleY(0)}94%,97%{transform:scaleY(1)}}.mood-happy #m-all{animation:m-hop .6s ease-in-out 2}.mood-happy #m-shell{animation:m-wiggle .6s ease-in-out 2}.mood-happy #m-mouth{d:path("M144,80 Q151,90 159,80")}@keyframes m-hop{0%,to{transform:translateY(0)}40%{transform:translateY(-14px)}70%{transform:translateY(2px)}}@keyframes m-wiggle{0%,to{transform:rotate(0)}30%{transform:rotate(-7deg)}70%{transform:rotate(6deg)}}.mood-cheer #m-all{animation:m-hop .55s ease-in-out 3}.mood-cheer #m-shell{animation:m-wiggle .55s ease-in-out 3}.mood-cheer #m-mouth{d:path("M143,79 Q151,92 160,79")}.mood-cheer #m-confetti .cf{animation:m-conf 1.4s ease-out 2}.mood-cheer .c1{fill:#bf552f}.mood-cheer .c2{fill:#c79a3a}.mood-cheer .c3{fill:#3a6b54}.mood-cheer .c4{fill:#bf552f}.mood-cheer .c5{fill:#c79a3a}.mood-cheer .c6{fill:#3a6b54}.mood-cheer .c2{animation-delay:.12s}.mood-cheer .c3{animation-delay:.24s}.mood-cheer .c4{animation-delay:.06s}.mood-cheer .c5{animation-delay:.18s}.mood-cheer .c6{animation-delay:.3s}@keyframes m-conf{0%{opacity:0;transform:translateY(26px) scale(.4)}25%{opacity:1}to{opacity:0;transform:translateY(-34px) rotate(140deg) scale(1)}}.mood-think #m-all{animation:m-bob 4.6s ease-in-out infinite}.mood-think #m-eyes{transform-origin:140px 62px;transform:rotate(-7deg) translateY(2px)}.mood-think #m-mouth{d:path("M146,86 Q151,83 157,86")}.mood-think #m-shell{animation:none}.mood-sleep #m-all{animation:m-bob 5.5s ease-in-out infinite}.mood-sleep #m-lids{animation:none;transform:scaleY(1)}.mood-sleep #m-zzz{opacity:1}.mood-sleep .zz{font:italic 700 13px Fraunces,serif;fill:#9c8467;animation:m-zz 2.6s ease-in-out infinite}.mood-sleep .z2{animation-delay:.4s;font-size:15px}.mood-sleep .z3{animation-delay:.8s;font-size:18px}@keyframes m-zz{0%,to{opacity:.2;transform:translateY(2px)}50%{opacity:1;transform:translateY(-3px)}}.mood-wave #m-all{animation:m-bow 1s ease-in-out 1}@keyframes m-bow{0%,to{transform:rotate(0)}40%{transform:rotate(-5deg) translateY(-6px)}}@media (prefers-reduced-motion: reduce){#m-all,#m-shell,#m-lids,#m-confetti .cf,.zz{animation:none!important}}.formula-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:14px;margin-top:6px}.f-card{padding:18px 20px}.f-card h3{font-family:Fraunces,serif;font-weight:600;font-size:1.2rem;margin-bottom:10px;color:var(--accent-d)}.f-row{display:flex;flex-direction:column;padding:7px 0;border-bottom:1px dashed var(--line)}.f-row:last-child{border-bottom:none}.f-name{font-size:.8rem;font-weight:700;letter-spacing:.04em;color:var(--ink-soft);text-transform:uppercase}.f-formula{font-size:1.05rem}@media (max-width:899px){.page-head{padding:2px 0 12px}.page-head h1{font-size:1.7rem}.page-head .sub{font-size:.95rem}.panel{border-radius:14px;margin-top:10px}.ex{padding:14px 14px 18px}.explain{padding:12px 14px 16px}.explain-panel summary{padding:13px 14px}.rule,.immo,.wozu{padding:10px 12px;font-size:.95rem}.question{font-size:1.18rem;margin-bottom:12px}.question.small{font-size:1.05rem}.home-grid,.formula-grid{grid-template-columns:1fr}.home-card{padding:16px}.f-card{padding:14px 16px}.exam-head h1{font-size:1.5rem}.exam-clock{font-size:1.45rem;padding:6px 12px;border-radius:10px}.chap-pill{font-size:.8rem;padding:6px 11px}.controls .btn{flex:1;min-width:130px;text-align:center}input.num{width:100%;max-width:280px;font-size:16px}.feedback{padding:12px 13px}.story-intro{font-size:.98rem}.viz{padding:10px 11px;overflow-x:auto}.viz-table{white-space:nowrap}}body.kb-open #mascot{display:none}body.kb-open .main{padding-bottom:30px}.daily-card{display:flex;align-items:center;gap:18px;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px 20px;box-shadow:var(--shadow);margin-top:6px}.daily-ring{width:64px;height:64px;flex:none}.daily-ring .dr-bg{fill:none;stroke:var(--paper2);stroke-width:6}.daily-ring .dr-fg{fill:none;stroke:var(--accent);stroke-width:6;stroke-linecap:round;transform:rotate(-90deg);transform-origin:center;transition:stroke-dashoffset .6s cubic-bezier(.2,.8,.2,1)}.daily-ring .dr-fg.done{stroke:var(--green)}.daily-ring .dr-txt{font-family:Hanken Grotesk,sans-serif;font-size:15px;font-weight:700;fill:var(--ink)}.daily-streak{font-size:1.15rem;font-weight:600}.daily-streak b{color:var(--accent)}.daily-sub{color:var(--ink-soft);font-size:.92rem;margin-top:2px}@media (max-width:899px){.daily-card{padding:13px 15px;gap:14px}.daily-streak{font-size:1.02rem}}.exam-hist{width:100%;max-width:440px;height:auto;display:block;margin-top:8px}.ready-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px 20px;box-shadow:var(--shadow);margin-top:6px}.ready-head{display:flex;justify-content:space-between;align-items:baseline}.ready-label{font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft);font-weight:700}.ready-pct{font-family:Fraunces,serif;font-size:2rem;font-weight:600;color:var(--accent)}.ready-bar{height:12px;background:var(--paper2);border:1px solid var(--line);border-radius:999px;overflow:hidden;margin:8px 0 6px}.ready-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--gold),var(--accent));transition:width .6s cubic-bezier(.2,.8,.2,1)}.ready-sub{color:var(--ink-soft);font-size:.92rem}.ready-hint{color:var(--accent-d)}.ready-weak{margin-top:12px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}.ready-weak-lbl{font-size:.85rem;color:var(--ink-soft);font-weight:600}.weak-chip{font-size:.82rem;font-weight:600;text-decoration:none;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:999px;padding:5px 12px;transition:.15s}.weak-chip:hover{border-color:var(--accent);color:var(--accent-d)}.ach-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin-top:8px}.ach-item{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;text-align:center;box-shadow:var(--shadow)}.ach-item.locked{opacity:.5;filter:grayscale(.6)}.ach-icon{font-size:2.2rem;line-height:1}.ach-title{font-family:Fraunces,serif;font-weight:600;font-size:1.02rem;margin-top:6px}.ach-item.got .ach-title{color:var(--accent-d)}.ach-desc{font-size:.82rem;color:var(--ink-soft);margin-top:4px}.celebration{position:fixed;top:0;right:0;bottom:0;left:0;z-index:80;display:flex;align-items:center;justify-content:center;background:#1e160c80;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);animation:cele-in .25s ease}@keyframes cele-in{0%{opacity:0}to{opacity:1}}.cele-card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:20px;padding:32px 30px;max-width:340px;text-align:center;box-shadow:0 20px 60px -20px #28190a99;animation:cele-pop .4s cubic-bezier(.2,1.2,.4,1)}@keyframes cele-pop{0%{transform:scale(.8) translateY(10px);opacity:0}to{transform:none;opacity:1}}.cele-icon{font-size:3.4rem;line-height:1}.cele-kicker{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-d);font-weight:700;margin-top:8px}.cele-title{font-family:Fraunces,serif;font-weight:600;font-size:1.5rem;margin:2px 0}.cele-desc{color:var(--ink-soft);font-size:.95rem}.cele-level{font-size:.85rem;color:var(--ink-soft);margin:12px 0 16px;background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:8px 10px}.cele-confetti{position:absolute;top:0;right:0;bottom:0;left:0;overflow:hidden;pointer-events:none}.cele-confetti i{position:absolute;top:-10px;left:calc(var(--n)*7%);width:9px;height:9px;border-radius:2px;background:var(--accent);opacity:0;animation:cele-fall 1.6s ease-in calc(var(--n)*.06s) 2}.cele-confetti i:nth-child(3n){background:var(--gold)}.cele-confetti i:nth-child(3n+1){background:var(--green)}@keyframes cele-fall{0%{opacity:0;transform:translateY(0) rotate(0)}15%{opacity:1}to{opacity:0;transform:translateY(420px) rotate(360deg)}}@media (prefers-reduced-motion:reduce){.cele-confetti i{animation:none}}.set-row{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}.set-title{font-weight:600;font-size:1.05rem}.set-desc{font-size:.88rem;color:var(--ink-soft);margin-top:2px}.toggle{flex:none;width:50px;height:28px;border-radius:999px;border:none;background:var(--line);cursor:pointer;position:relative;transition:.2s}.toggle.on{background:var(--green)}.toggle span{position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:#fff;transition:.2s;box-shadow:0 1px 3px #0003}.toggle.on span{left:25px}.goal-pick{display:flex;gap:6px}.goal-opt{font:inherit;font-weight:600;cursor:pointer;background:var(--paper);border:2px solid var(--line);border-radius:10px;padding:7px 13px;transition:.15s}.goal-opt:hover{border-color:var(--accent)}.goal-opt.on{background:var(--accent);color:#fff;border-color:var(--accent)}.tools-panel summary{cursor:pointer;padding:13px 20px;font-weight:700;list-style:none;-webkit-user-select:none;user-select:none}.tools-panel summary::-webkit-details-marker{display:none}.tools-panel summary:after{content:"⌄";float:right;transition:.2s;color:var(--accent-d)}.tools-panel[open] summary:after{transform:rotate(180deg)}.tools-panel[open] summary{border-bottom:1px solid var(--line)}.tools-body{padding:16px 20px;display:flex;gap:20px;flex-wrap:wrap}.calc{flex:0 0 220px}.calc-display{width:100%;font:inherit;font-size:1.3rem;text-align:right;padding:10px 12px;border:2px solid var(--line);border-radius:10px;background:#fff;font-variant-numeric:tabular-nums;margin-bottom:8px}.calc-keys{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}.calc-k{font:inherit;font-size:1.05rem;font-weight:600;cursor:pointer;padding:12px 0;border:1px solid var(--line);border-radius:9px;background:var(--card);transition:.12s}.calc-k:hover{border-color:var(--accent);background:var(--paper)}.calc-k.op{background:var(--paper2)}.calc-k.eq{background:var(--accent);color:#fff;border-color:var(--accent)}.calc-k.clr{color:var(--accent-d)}.tool-formulas{flex:1;min-width:220px}.tool-h{font-family:Fraunces,serif;font-weight:600;font-size:1.1rem;color:var(--accent-d);margin-bottom:8px}@media (max-width:560px){.calc{flex-basis:100%}}.distractor{background:#fff5ef;border:1px solid #e8cdb6;border-left:4px solid var(--gold);border-radius:8px;padding:9px 12px;margin:8px 0;font-size:.95rem;color:#7a5a30}.daily-challenge{background:linear-gradient(135deg,#fdf6e4,#f6e7d3);border-color:#e8d5a3}.daily-challenge.dc-done{opacity:.75}.example-answer{font-size:1.1rem;margin:8px 0}.example-answer b{color:var(--green)}#hint2Btn{background:none;border:none;color:var(--accent-d);font:inherit;font-weight:600;cursor:pointer;text-decoration:underline;padding:0;margin-left:14px}