.khb-tool{--khb-ink:#26334d;--khb-blue:#2563eb;--khb-blue-dark:#1d4ed8;--khb-cyan:#0891b2;--khb-rose:#e11d48;--khb-green:#15803d;--khb-muted:#64748b;position:relative;isolation:isolate;overflow:hidden;padding:clamp(1rem,3vw,2rem);border:1px solid #dbeafe;border-radius:24px;background:linear-gradient(145deg,#fbfdff 0%,#eff6ff 55%,#f0fdfa 100%);color:var(--khb-ink);box-shadow:0 18px 50px rgba(30,64,175,.09)}
.khb-bg-shape{position:absolute;z-index:-1;border-radius:50%;pointer-events:none}.khb-bg-one{width:190px;height:190px;right:-70px;top:-80px;background:rgba(191,219,254,.5)}.khb-bg-two{width:150px;height:150px;left:-70px;bottom:-85px;background:rgba(153,246,228,.35)}
.khb-hero{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;margin-bottom:1.25rem}.khb-brand{display:flex;align-items:center;gap:1rem;min-width:260px}.khb-logo{position:relative;width:64px;height:64px;display:grid;place-items:center;flex:0 0 auto;border:4px solid #fff;border-radius:20px;background:linear-gradient(145deg,#60a5fa,var(--khb-blue));box-shadow:0 9px 22px rgba(37,99,235,.25);transform:rotate(-4deg)}.khb-logo::before{content:"";width:22px;height:31px;border:4px solid #fff;border-radius:50% 50% 45% 45%;transform:rotate(-8deg)}.khb-logo span::before,.khb-logo span::after{content:"";position:absolute;top:23px;width:13px;height:4px;border-radius:5px;background:#fff}.khb-logo span::before{left:11px;transform:rotate(25deg)}.khb-logo span::after{right:11px;transform:rotate(-25deg)}
.khb-kicker{display:block;color:var(--khb-blue);font-size:.68rem;font-weight:900;letter-spacing:.12em;text-transform:uppercase}.khb-hero h2{margin:.15rem 0 .2rem;color:var(--khb-ink);font-size:clamp(1.5rem,3vw,2rem);line-height:1.1}.khb-hero p{max-width:39rem;margin:0;color:var(--khb-muted);font-size:.92rem}
.khb-stats{display:grid;grid-template-columns:repeat(4,minmax(78px,1fr));gap:.55rem}.khb-stat{display:flex;align-items:center;gap:.45rem;min-width:82px;padding:.65rem .7rem;border:1px solid #dbeafe;border-radius:14px;background:rgba(255,255,255,.9);box-shadow:0 4px 12px rgba(30,64,175,.05)}.khb-stat-icon{width:27px;height:27px;display:grid;place-items:center;flex:0 0 auto;border-radius:9px;background:#eff6ff;color:var(--khb-blue);font-size:.74rem;font-weight:900}.khb-stat strong{display:block;color:var(--khb-ink);font-size:1.15rem;line-height:1;font-variant-numeric:tabular-nums}.khb-stat small{display:block;margin-top:.15rem;color:var(--khb-muted);font-size:.56rem;font-weight:800;letter-spacing:.05em;text-transform:uppercase}
.khb-tabs{display:flex;gap:.4rem;margin-bottom:1rem;padding:.3rem;border:1px solid #dbeafe;border-radius:14px;background:rgba(255,255,255,.8)}.khb-tab{display:inline-flex!important;align-items:center;justify-content:center;gap:.45rem;visibility:visible!important;flex:1;min-height:43px;padding:.55rem 1rem;border:0;border-radius:10px;background:transparent;color:#64748b;font:inherit;font-size:.8rem;font-weight:900;cursor:pointer}.khb-tab span{width:25px;height:25px;display:grid;place-items:center;border-radius:7px;background:#f1f5f9;font-size:.68rem;font-weight:900}.khb-tab.is-active{background:#fff;color:var(--khb-blue-dark);box-shadow:0 4px 12px rgba(30,64,175,.12)}.khb-tab.is-active span{background:#dbeafe;color:var(--khb-blue)}
.khb-panel{padding:clamp(.85rem,2vw,1.2rem);border:1px solid #dbeafe;border-radius:20px;background:rgba(255,255,255,.94);box-shadow:0 10px 28px rgba(30,64,175,.06)}.khb-toolbar{display:flex;align-items:flex-end;gap:.65rem;flex-wrap:wrap;margin-bottom:.65rem}.khb-filter{display:flex;flex:0 1 210px;flex-direction:column;gap:.25rem}.khb-filter span,.khb-quiz-settings label>span{color:#64748b;font-size:.61rem;font-weight:900;letter-spacing:.06em;text-transform:uppercase}.khb-filter select,.khb-quiz-settings select,.khb-search input{width:100%;min-height:38px;padding:.42rem .65rem;border:1px solid #bfdbfe;border-radius:9px;background:#fff;color:var(--khb-ink);font:inherit;font-size:.74rem;font-weight:800}.khb-search{flex:1 1 190px}.khb-search input{font-weight:600}.khb-explore-copy{margin-left:auto;padding-bottom:.55rem;color:#64748b;font-size:.68rem;font-weight:800}.khb-progress{height:7px;overflow:hidden;border-radius:99px;background:#e2e8f0}.khb-progress span{display:block;width:0;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--khb-blue),#22d3ee);transition:width .25s ease}
.khb-grid{display:grid;grid-template-columns:repeat(6,minmax(100px,1fr));gap:.55rem;margin-top:.8rem}.khb-tile{position:relative;display:flex!important;align-items:center;gap:.55rem;visibility:visible!important;min-height:62px;padding:.55rem;border:2px solid #e2e8f0;border-radius:13px;background:#fff;color:var(--khb-ink);font:inherit;font-size:.76rem;font-weight:900;text-align:left;cursor:pointer;box-shadow:0 3px 9px rgba(51,65,85,.04);transition:transform .15s,border-color .15s}.khb-tile:hover,.khb-tile:focus-visible{transform:translateY(-2px);border-color:#60a5fa;outline:3px solid rgba(96,165,250,.2)}.khb-tile-code{width:34px;height:34px;display:grid;place-items:center;flex:0 0 auto;border-radius:10px;background:#eff6ff;color:var(--khb-blue);font-size:.7rem}.khb-tile small{position:absolute;left:45px;bottom:6px;max-width:calc(100% - 50px);overflow:hidden;color:#94a3b8;font-size:.49rem;font-weight:800;text-overflow:ellipsis;white-space:nowrap}.khb-tile.is-explored::after{content:"✓";position:absolute;right:4px;top:3px;color:#16a34a;font-size:.6rem}.khb-tile.is-active{border-color:var(--khb-blue);background:#eff6ff}.khb-empty{margin:1rem 0;text-align:center;color:#64748b}
.khb-detail{display:grid;grid-template-columns:auto auto 1fr auto;align-items:center;gap:1rem;margin-top:1rem;padding:1rem;border:1px solid #bfdbfe;border-radius:18px;background:linear-gradient(135deg,#eff6ff,#f8fafc)}.khb-organ{width:96px;height:96px;display:grid;place-items:center;border:4px solid #fff;border-radius:22px;background:linear-gradient(145deg,#60a5fa,var(--khb-blue));color:#fff;font-size:1.7rem;font-weight:900;box-shadow:0 8px 20px rgba(37,99,235,.2)}.khb-detail-copy{min-width:0}.khb-system{display:inline-block;padding:.23rem .5rem;border-radius:99px;background:#dbeafe;color:#1e40af;font-size:.59rem;font-weight:900;letter-spacing:.05em;text-transform:uppercase}.khb-detail h3{margin:.25rem 0 .2rem;color:var(--khb-ink)}.khb-detail-copy>p{margin:0 0 .65rem;color:#475569;font-size:.84rem}.khb-info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:.55rem;margin-bottom:.7rem}.khb-info-grid div{padding:.55rem;border:1px solid #e2e8f0;border-radius:10px;background:#fff}.khb-info-grid strong{display:block;margin-bottom:.15rem;color:var(--khb-blue-dark);font-size:.6rem;text-transform:uppercase}.khb-info-grid span{display:block;color:#64748b;font-size:.7rem;line-height:1.4}.khb-nav{display:grid!important;place-items:center;visibility:visible!important;width:38px;height:48px;padding:0;border:1px solid #bfdbfe;border-radius:11px;background:#fff;color:var(--khb-blue);font:inherit;font-size:1.7rem;font-weight:700;cursor:pointer}.khb-nav:hover{background:#eff6ff}
.khb-action{display:inline-flex!important;align-items:center;justify-content:center;gap:.4rem;visibility:visible!important;min-width:165px;min-height:42px;padding:.6rem .9rem;border:2px solid var(--khb-blue);border-radius:10px;font:inherit;font-size:.76rem;font-weight:900;line-height:1.2;cursor:pointer}.khb-action-primary{background:var(--khb-blue)!important;color:#fff!important;box-shadow:0 6px 14px rgba(37,99,235,.2)}.khb-action-primary:hover{border-color:var(--khb-blue-dark);background:var(--khb-blue-dark)!important}.khb-action-outline{border-color:#93c5fd!important;background:#fff!important;color:var(--khb-blue-dark)!important}.khb-action-outline:hover{background:#eff6ff!important}.khb-action:disabled{display:inline-flex!important;visibility:visible!important;cursor:not-allowed;opacity:.55}
.khb-quiz-head{display:flex;align-items:flex-end;justify-content:space-between;gap:1rem;margin-bottom:.8rem}.khb-quiz-head h3{margin:.15rem 0 0;color:var(--khb-ink)}.khb-quiz-settings{display:flex;gap:.55rem}.khb-quiz-settings label{display:flex;min-width:145px;flex-direction:column;gap:.25rem}.khb-round-row{display:flex;justify-content:space-between;gap:1rem;max-width:720px;margin:0 auto .35rem;color:#64748b;font-size:.67rem;font-weight:900}.khb-quiz-card{max-width:720px;margin:.8rem auto 0;padding:1.2rem;border:1px solid #bfdbfe;border-radius:18px;background:linear-gradient(145deg,#eff6ff,#fff);text-align:center}.khb-prompt{max-width:620px;margin:.6rem auto .4rem;color:var(--khb-ink);font-size:clamp(1rem,2.5vw,1.25rem);font-weight:900;line-height:1.45}.khb-target{width:58px;height:58px;display:grid;place-items:center;margin:.5rem auto;border-radius:16px;background:var(--khb-blue);color:#fff;font-size:1.1rem;font-weight:900}
.khb-choices{display:grid;grid-template-columns:repeat(3,1fr);gap:.6rem;max-width:620px;margin:.85rem auto}.khb-choice{position:relative;display:flex!important;align-items:center;justify-content:center;visibility:visible!important;min-height:55px;padding:.6rem .6rem .6rem 2rem;border:2px solid #dbeafe;border-radius:12px;background:#fff;color:var(--khb-ink);font:inherit;font-size:.78rem;font-weight:900;cursor:pointer}.khb-choice:hover:not(:disabled),.khb-choice:focus-visible{border-color:#60a5fa;outline:3px solid rgba(96,165,250,.2)}.khb-choice-key{position:absolute;left:6px;width:19px;height:19px;display:grid;place-items:center;border-radius:6px;background:#eff6ff;color:var(--khb-blue);font-size:.55rem}.khb-choice.is-correct{border-color:#22c55e!important;background:#dcfce7!important;color:#14532d!important}.khb-choice.is-wrong{border-color:#ef4444!important;background:#fee2e2!important;color:#7f1d1d!important}.khb-choice:disabled:not(.is-correct):not(.is-wrong){opacity:.5}
.khb-feedback{min-height:38px;margin:.6rem 0;padding:.55rem;border-radius:10px;font-size:.76rem;font-weight:800}.khb-feedback.is-info{border:1px solid #bfdbfe;background:#eff6ff;color:#1e3a8a}.khb-feedback.is-success{border:1px solid #86efac;background:#dcfce7;color:#14532d}.khb-feedback.is-error{border:1px solid #fca5a5;background:#fee2e2;color:#7f1d1d}.khb-explanation{display:flex;align-items:center;gap:.5rem;padding:.65rem;border:1px solid #a5f3fc;border-radius:10px;background:#ecfeff;color:#164e63;text-align:left}.khb-explanation span{width:22px;height:22px;display:grid;place-items:center;flex:0 0 auto;border-radius:50%;background:#06b6d4;color:#fff;font-family:Georgia,serif;font-weight:900}.khb-explanation p{margin:0;font-size:.75rem}.khb-actions{display:flex;justify-content:center;gap:.55rem;margin-top:.75rem}
.khb-summary{max-width:720px;margin:1rem auto 0;padding:1.4rem;border:1px solid #fde68a;border-radius:18px;background:linear-gradient(135deg,#fffbeb,#eff6ff);text-align:center}.khb-summary-icon{width:50px;height:50px;display:grid;place-items:center;margin:0 auto .55rem;border-radius:50%;background:#fef3c7;color:#d97706;font-size:1.3rem}.khb-summary h3{margin:.2rem 0;color:var(--khb-ink)}.khb-summary p{margin:.35rem auto .9rem;color:#64748b}.khb-footer{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.75rem .2rem 0;color:#64748b;font-size:.67rem}.khb-footer button{display:inline-flex!important;visibility:visible!important;padding:.25rem;border:0;background:transparent;color:#64748b;font:inherit;font-weight:800;text-decoration:underline;text-underline-offset:3px;cursor:pointer}
@media(max-width:1000px){.khb-hero{align-items:flex-start;flex-direction:column}.khb-stats{width:100%}.khb-grid{grid-template-columns:repeat(4,1fr)}}
@media(max-width:700px){.khb-tool{border-radius:18px}.khb-brand{align-items:flex-start}.khb-logo{width:54px;height:54px;border-radius:16px}.khb-stats{grid-template-columns:repeat(2,1fr)}.khb-stat{justify-content:center}.khb-tabs{flex-direction:column}.khb-explore-copy{width:100%;margin-left:0}.khb-grid{grid-template-columns:repeat(2,1fr)}.khb-detail{grid-template-columns:36px 1fr 36px;text-align:center}.khb-organ{grid-column:2;width:86px;height:86px;margin:0 auto}.khb-detail-copy{grid-column:1/-1;grid-row:2}.khb-nav:first-child{grid-column:1;grid-row:1}.khb-nav:last-child{grid-column:3;grid-row:1}.khb-info-grid{grid-template-columns:1fr;text-align:left}.khb-quiz-head,.khb-quiz-settings{align-items:stretch;flex-direction:column}.khb-quiz-settings label{min-width:0}.khb-choices{grid-template-columns:repeat(2,1fr)}.khb-actions{flex-direction:column-reverse}.khb-action{width:100%}.khb-footer{align-items:flex-start;flex-direction:column}}
@media(max-width:390px){.khb-grid,.khb-choices{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.khb-progress span,.khb-tile{transition:none}}
.khb-tile-code{width:38px;height:38px;color:inherit;font-size:0}.khb-card-icon{display:block;width:32px;height:32px;object-fit:contain}.khb-tile small{left:49px;max-width:calc(100% - 54px)}
.khb-organ{background:linear-gradient(145deg,#dbeafe,#ecfeff);color:inherit;font-size:0}.khb-detail-icon{display:block;width:78px;height:78px;object-fit:contain}
.khb-target{width:82px;height:82px;border:2px solid #bfdbfe;background:#fff;color:inherit;font-size:0}.khb-quiz-icon{display:block;width:68px;height:68px;object-fit:contain}
.khb-anatomy-model{display:grid;grid-template-columns:180px 1fr;align-items:center;gap:1rem;margin:1rem 0;padding:.8rem;border:1px solid #bfdbfe;border-radius:18px;background:linear-gradient(135deg,#eff6ff,#ecfeff)}.khb-anatomy-image{height:220px;overflow:hidden;border:4px solid #fff;border-radius:14px;background:#dbeafe;box-shadow:0 6px 16px rgba(30,64,175,.13)}.khb-anatomy-image img{width:100%;height:100%;display:block;object-fit:cover;object-position:center 24%}.khb-anatomy-model h3{margin:.35rem 0 .25rem;color:var(--khb-ink)}.khb-anatomy-model p{max-width:620px;margin:0 0 .65rem;color:#64748b;font-size:.8rem;line-height:1.5}.khb-anatomy-key{display:flex;flex-wrap:wrap;gap:.35rem}.khb-anatomy-key span{padding:.25rem .5rem;border:1px solid #bfdbfe;border-radius:99px;background:#fff;color:#1e40af;font-size:.62rem;font-weight:800}
@media(max-width:560px){.khb-anatomy-model{grid-template-columns:1fr;text-align:center}.khb-anatomy-image{width:180px;height:230px;margin:0 auto}.khb-anatomy-key{justify-content:center}}