.ka-root{--ka-purple:#51306f;--ka-yellow:#f6cd55;font:16px/1.55 system-ui,-apple-system,Segoe UI,sans-serif;color:#2c2035;background:#f7f4fa;border-radius:24px;max-width:1060px;margin:24px auto;padding:28px;box-sizing:border-box}.ka-root *{box-sizing:border-box}.ka-root [hidden]{display:none!important}.ka-root button,.ka-root select{font:inherit;cursor:pointer}.ka-root button{border:1px solid #ddd3e7;background:white;color:#51306f;border-radius:10px;padding:9px 15px;line-height:1.4}.ka-root button:focus-visible,.ka-root select:focus-visible{outline:3px solid #d9980a;outline-offset:2px}.ka-root button:hover{background:#eee7f5}.ka-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.ka-root h2{font-size:34px;line-height:1.2;margin:5px 0 10px;color:#39234e}.ka-header p{margin:0;color:#756581}.ka-eyebrow,.ka-kicker{font-size:11px;font-weight:800;letter-spacing:2px}.ka-badge{font:64px Georgia,serif;color:#51306f;background:#e9e0f1;border-radius:50%;width:88px;height:88px;text-align:center}.ka-controls{display:flex;gap:16px;margin-bottom:18px}.ka-controls label{display:grid;gap:5px;flex:1;font-size:13px;font-weight:700}.ka-root select{width:100%;padding:11px;border:1px solid #dacfe3;border-radius:10px;background:#fff;color:#39234e}.ka-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}.ka-root .ka-active{background:#51306f;color:#fff;border-color:#51306f}.ka-count{display:inline-block;min-width:20px;padding:0 5px;background:#f6cd55;color:#39234e;border-radius:5px;font-size:12px}.ka-layout{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(260px,1fr);gap:25px}.ka-board{display:grid;grid-template-columns:repeat(8,1fr);aspect-ratio:1;overflow:hidden;border:5px solid #51306f;border-radius:12px;box-shadow:0 10px 25px #40265320}.ka-root .ka-square{position:relative;border:0;border-radius:0;padding:0;display:flex;align-items:center;justify-content:center;aspect-ratio:1;min-width:0;color:#2d2038}.ka-root .ka-light{background:#f3ede1}.ka-root .ka-dark{background:#ad96c1}.ka-root .ka-square:hover{filter:brightness(1.04)}.ka-root .ka-last{box-shadow:inset 0 0 0 4px #f6cd55a0}.ka-root .ka-selected{background:#f6cd55}.ka-piece{font-family:'DejaVu Sans','Segoe UI Symbol','Arial Unicode MS',serif;font-size:clamp(26px,4.7vw,53px);line-height:1;z-index:1}.ka-white{color:white;text-shadow:1px 1px 1px #271633,-1px -1px 1px #271633}.ka-black{color:#261b32}.ka-legal:after{content:'';position:absolute;width:21%;height:21%;background:#51306f80;border-radius:50%}.ka-legal:has(.ka-piece:not(:empty)):after{width:90%;height:90%;background:transparent;border:4px solid #51306f88}.ka-square small{position:absolute;font-size:10px;font-weight:700;line-height:1}.ka-rank{top:4px;left:4px}.ka-file{bottom:3px;right:4px}.ka-boardtools{display:flex;gap:8px;justify-content:space-between;margin-top:12px}.ka-caption,.ka-footer{font-size:12px;color:#766581}.ka-caption{margin:9px 0 0}.ka-panel{background:#fff;border:1px solid #e6ddec;border-radius:17px;padding:23px;align-self:start}.ka-root h3{font-size:23px;line-height:1.3;margin:8px 0 20px}.ka-progress{height:7px;border-radius:10px;background:#eee7f3;overflow:hidden}.ka-progress span{display:block;background:#8a58ac;height:100%;transition:width .3s}.ka-position{font-size:12px;color:#7b6c87}.ka-message{padding:17px;border-radius:12px;background:#f5f0fa;min-height:110px;font-size:17px;line-height:1.6}.ka-actions{display:flex;gap:8px;margin-top:16px}.ka-root .ka-next{background:#f6cd55;border-color:#f6cd55;font-weight:700;color:#362245}.ka-history{font-size:13px;line-height:1.8;word-break:break-word;margin-top:20px;color:#756581}.ka-stats{border-top:1px solid #eee6f3;padding-top:14px;margin-top:18px;font-size:12px;color:#756581}.ka-footer{margin-top:24px;border-top:1px solid #e5ddeb;padding-top:14px}.ka-warning{color:#963d13;font-size:13px}.ka-promotion{margin-top:12px}.ka-promotion button{margin:3px}@media(max-width:700px){.ka-root{padding:16px;border-radius:16px}.ka-layout{grid-template-columns:1fr;gap:18px}.ka-controls{flex-direction:column;gap:10px}.ka-root h2{font-size:28px}.ka-badge{width:58px;height:58px;font-size:42px}.ka-header p{font-size:13px}.ka-panel{padding:18px}.ka-piece{font-size:clamp(26px,8.5vw,52px)}.ka-tabs button{padding:9px 10px;font-size:13px}.ka-message{min-height:75px}.ka-root h3{font-size:20px}}

.ka-root button:not(.ka-square),.ka-root select{min-height:48px}.ka-root .ka-active:hover{background:#64288a;color:#fff}.ka-root .ka-dark:hover{background:#ad96c1}.ka-root .ka-light:hover{background:#f3ede1}.ka-root .ka-selected:hover{background:#f6cd55}

.ka-root .ka-white{color:#fff2cf;text-shadow:1px 0 #372443,-1px 0 #372443,0 1px #372443,0 -1px #372443}.ka-root .ka-black{color:#261b32}

.ka-board{position:relative}.ka-root .ka-guide-arrow{position:absolute;inset:0;width:100%;height:100%;z-index:3;pointer-events:none;overflow:visible}

.ka-root .ka-lesson-guide{background:#fff;border:1px solid #ddd0e8;margin:0 0 20px;padding:0 16px;border-radius:6px}.ka-root .ka-lesson-guide summary{cursor:pointer;min-height:48px;align-content:center;font-weight:700;color:#51306f}.ka-root .ka-guide-content p{font-size:15px;line-height:1.7;margin:12px 0}.ka-root .ka-guide-content a{display:inline-block;min-height:32px;color:#641987}.ka-root .ka-controls label:first-child{flex:.85}.ka-root .ka-controls label:last-child{flex:1.6}

.ka-root .ka-moving{position:absolute;width:12.5%;height:12.5%;display:flex;align-items:center;justify-content:center;z-index:5;pointer-events:none;will-change:transform}.ka-root .ka-lastmove{min-height:24px;font-size:15px;font-weight:700;color:#51306f;margin:6px 0 12px}.ka-root .ka-last{box-shadow:inset 0 0 0 4px #f6cd5580}.ka-root .ka-landed::before{content:'';position:absolute;inset:0;z-index:0;background:#f6cd55;pointer-events:none;animation:ka-arrival .7s ease-out forwards}@keyframes ka-arrival{from{opacity:.5}to{opacity:0}}@media(prefers-reduced-motion:reduce){.ka-root .ka-landed::before{animation:none;opacity:.15}}

/* Keep the live teaching message with the board in every mode. */
.ka-play-area{min-width:0;scroll-margin-top:48px}.ka-coach{background:#fff;border:1px solid #ddd0e8;border-left:3px solid #8a58ac;border-radius:10px;padding:12px 16px;margin-bottom:14px}.ka-coach .ka-position{margin:0 0 4px}.ka-coach .ka-lastmove{min-height:0;margin:0 0 6px;font-size:13px}.ka-coach .ka-lastmove:empty{display:block}.ka-coach .ka-message{min-height:0;background:transparent;padding:0;border-radius:0;font-size:16px;line-height:1.45}.ka-coach .ka-actions{margin-top:8px}.ka-coach .ka-actions:not(:has(button:not([hidden]))){display:flex}.ka-study-details{margin-top:16px}.ka-study-details summary{cursor:pointer;font-size:13px;font-weight:700;min-height:44px;align-content:center}.ka-study-details .ka-history{margin-top:10px}
@media(max-width:700px){.ka-root{padding:12px;margin:12px auto}.ka-layout{gap:14px}.ka-header{margin-bottom:12px}.ka-controls{gap:8px;margin-bottom:10px}.ka-root .ka-lesson-guide{margin-bottom:10px}.ka-tabs{margin-bottom:12px}.ka-coach{padding:9px 11px;margin-bottom:8px}.ka-coach .ka-message{font-size:14px;line-height:1.45;max-height:min(26svh,170px);overflow-y:auto;overscroll-behavior:contain}.ka-coach .ka-position{font-size:11px}.ka-coach .ka-lastmove{font-size:12px}.ka-coach .ka-actions button{min-height:44px;padding:8px 12px}.ka-board{width:100%;max-width:clamp(216px,calc(100svh - var(--ka-message-height) - 290px),100%);margin-inline:auto;border-width:3px}.ka-board .ka-piece{font-size:clamp(23px,7.5vmin,45px)}.ka-boardtools{margin-top:8px}.ka-caption{font-size:11px;margin-top:5px}.ka-panel{padding:14px}.ka-panel h3{font-size:18px;margin:5px 0 12px}}
@media(max-width:700px) and (orientation:landscape){.ka-layout{grid-template-columns:1fr}.ka-play-area{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:8px 12px;align-items:start}.ka-coach{grid-column:1;grid-row:1;margin:0}.ka-board{grid-column:2;grid-row:1;max-width:calc(100svh - 140px)}.ka-boardtools{grid-column:2;grid-row:2;margin-top:0}.ka-caption{grid-column:1/-1;grid-row:3}.ka-coach .ka-message{font-size:13px}}

/* The feedback slot is stable: text changes never push the board. */
.ka-play-area{--ka-message-height:140px}.ka-coach{position:relative}.ka-coach .ka-position{height:18px;line-height:18px;white-space:nowrap;overflow:hidden}.ka-coach .ka-lastmove{height:20px;line-height:20px;white-space:nowrap;margin:0 0 6px}.ka-coach .ka-message{height:var(--ka-message-height);max-height:none;overflow-y:auto;overscroll-behavior:contain}.ka-coach .ka-actions{height:48px;min-height:48px;align-items:start}.ka-coach .ka-promotion{position:absolute;inset:auto 8px 8px;background:#fff;padding:10px;border:1px solid #d9c9e4;border-radius:8px;box-shadow:0 4px 18px #39234e30;z-index:6}.ka-coach .ka-promotion p{margin:0 0 4px}
@media(max-width:700px){.ka-play-area{--ka-message-height:clamp(76px,14svh,112px)}.ka-coach .ka-lastmove{font-size:12px}.ka-coach .ka-message{height:var(--ka-message-height);max-height:none}.ka-coach .ka-actions button{max-height:48px}}

/* Tablets and computers: board left, teaching and progress right. */
.ka-layout{grid-template-columns:minmax(0,1.25fr) minmax(260px,1fr);grid-template-areas:"board coach" "board panel" "tools ." "caption .";grid-template-rows:auto 1fr auto auto;gap:14px 25px;align-items:start;scroll-margin-top:48px}.ka-layout>.ka-play-area{display:contents}.ka-layout .ka-board{grid-area:board;align-self:start;width:100%;max-width:100%}.ka-layout .ka-coach{grid-area:coach;margin:0;min-width:0}.ka-layout .ka-panel{grid-area:panel}.ka-layout .ka-boardtools{grid-area:tools;margin:0}.ka-layout .ka-caption{grid-area:caption;margin:0}.ka-coach .ka-actions{flex-wrap:nowrap;gap:8px}.ka-coach .ka-actions button{font-size:14px;line-height:1.2;padding:8px 10px;max-height:48px}.ka-root .ka-next-course{background:#f6cd55;border-color:#f6cd55;color:#362245;font-weight:700}
@media(max-width:700px){.ka-layout{grid-template-columns:1fr;grid-template-areas:"coach" "board" "tools" "caption" "panel";grid-template-rows:auto;gap:8px}.ka-layout .ka-board{max-width:clamp(216px,calc(100svh - var(--ka-message-height) - 290px),100%)}.ka-layout .ka-panel{margin-top:8px}.ka-layout .ka-coach{padding:9px 11px}.ka-layout .ka-boardtools{margin-top:0}}
@media(max-width:700px) and (orientation:landscape){.ka-layout{grid-template-columns:minmax(0,1fr) minmax(0,1fr);grid-template-areas:"board coach" "tools panel" "caption panel";gap:8px 12px}.ka-layout .ka-board{max-width:calc(100svh - 140px)}}

.ka-layout .ka-boardtools{gap:8px}.ka-boardtools button{flex:1;min-width:0;padding:8px 10px;font-size:13px;line-height:1.2}.ka-root .ka-sound[aria-pressed="true"]{background:#eee7f5;border-color:#bfa7d0}.ka-root .ka-sound[aria-pressed="false"]{color:#756581}

/* Pointer drag works with mouse, touch and pen; empty squares can still scroll. */
.ka-board{user-select:none;-webkit-user-select:none;touch-action:pan-y pinch-zoom}.ka-root .ka-draggable{cursor:grab;touch-action:none}.ka-root .ka-dragging,.ka-root .ka-dragging .ka-square{cursor:grabbing}.ka-root .ka-drag-piece{position:absolute;width:12.5%;height:12.5%;display:flex;align-items:center;justify-content:center;transform:translate(-50%,-50%);z-index:8;pointer-events:none;filter:drop-shadow(0 3px 3px #27163355)}.ka-root .ka-drop-target{outline:3px solid #f6cd55;outline-offset:-3px}

.ka-share{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:12px 0}.ka-share input{width:100%;min-width:0;font-size:14px;padding:10px}.ka-copy-status{font-size:14px}
@media(max-width:700px){.ka-tabs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.ka-tabs button{width:100%;min-width:0}}
.ka-staff-assign{padding:14px;border:1px solid #d9cbed;border-radius:12px;margin:12px 0}.ka-staff-assign summary{cursor:pointer;font-weight:700}.ka-student-list{max-height:280px;overflow:auto;margin:12px 0}.ka-student-list label{display:block;padding:8px;border-bottom:1px solid #eee}.ka-student-list label[hidden]{display:none}.ka-student-search{display:block;width:100%;box-sizing:border-box;padding:10px}.ka-section-nav{margin:10px 0}.ka-section-nav select{padding:8px;margin-left:8px;max-width:100%}

/* tahta v2 */
.ka-root .ka-board{border:4px solid #3d1f57!important;border-radius:6px!important;box-shadow:0 14px 40px #3d1f5740!important;background:#3d1f57}
.ka-root .ka-board .ka-square,.ka-root button.ka-square{border-radius:0!important;border:0!important;box-shadow:none}
.ka-root .ka-board .ka-light{background:#f1e9f8!important}
.ka-root .ka-board .ka-dark{background:#9a7bc4!important}
.ka-root .ka-board .ka-selected{background:#f6cd55!important}
.ka-root .ka-board .ka-last{box-shadow:inset 0 0 0 100px #f6cd5559!important}
.ka-root .ka-board .ka-light small{color:#7a58a8}
.ka-root .ka-board .ka-dark small{color:#f1e9f8}
.ka-root .ka-board .ka-piece{font-size:clamp(28px,6.2vmin,58px);font-weight:400}
.ka-root .ka-board .ka-white{color:#fffaf0!important;text-shadow:-1.5px -1.5px 0 #2b1738,1.5px -1.5px 0 #2b1738,-1.5px 1.5px 0 #2b1738,1.5px 1.5px 0 #2b1738,0 0 3px #2b1738,0 3px 4px #2b173866!important}
.ka-root .ka-board .ka-black{color:#1b1025!important;text-shadow:0 1px 0 #ffffff55,0 3px 4px #1b102555!important}
.ka-root .ka-board .ka-legal:after{background:#3d1f5766!important}
.ka-root .ka-board .ka-legal:has(.ka-piece:not(:empty)):after{background:transparent!important;border:4px solid #3d1f5799!important}

p:has(+ .ka-root[data-private]){display:block;width:fit-content;padding:5px 14px;border-radius:10px;background:#fff3c4;border:1.5px solid #f5b400;color:#3b2a00;font-weight:400;margin:12px 0}