.kd-app{max-width:none}
.kd-hud{position:relative;gap:10px}
.kd-hud__stats{flex-wrap:nowrap;gap:7px;padding:6px;border:1px solid #dbe5f2;border-radius:999px;background:#ffffffd9;box-shadow:0 6px 20px #1e293b12,0 1px 3px #1e293b12}
.kd-hud__stats .kd-chip{display:flex;justify-content:center;min-height:46px;padding:0 16px;background:#e9f0ff;color:#2459c4;border:0;border-radius:999px;box-shadow:none;font-size:16px;font-variant-numeric:tabular-nums;white-space:nowrap}
.kd-hud__stats .kd-chip:last-child{background:#e8f9ee;color:#21824a}
.missing-elapsed{position:absolute;left:50%;transform:translateX(-50%);display:inline-flex;align-items:center;justify-content:center;min-width:110px;min-height:58px;padding:0 18px;border:1px solid #dbe5f2;border-radius:999px;background:#ffffffd9;box-shadow:0 6px 20px #1e293b12,0 1px 3px #1e293b12;color:var(--kd-primary);font-size:22px;font-weight:800;font-variant-numeric:tabular-nums;pointer-events:none}
.missing-controls{display:flex;align-items:center;gap:7px;padding:6px;border:1px solid #dbe5f2;border-radius:999px;background:#ffffffd9;box-shadow:0 6px 20px #1e293b12,0 1px 3px #1e293b12}
.missing-controls .kd-btn--icon{width:46px;height:46px;min-width:46px;min-height:46px;padding:0;border:0;border-radius:50%;font-size:22px}
.missing-controls .missing-back{background:#e9f0ff;color:#2459c4;text-decoration:none}
.missing-controls .missing-back svg{display:block}
.missing-controls #kd-sound{background:#edf8f8;font-size:19px}
.missing-controls #kd-replay{background:#fff1df;color:#a45a0b;font-size:29px}
.missing-controls #kd-pause{background:#f0edff;color:#6753b8}
.missing-controls .kd-toggle[aria-pressed="false"]{opacity:1;background:#f1f5f9;color:#64748b}

.missing-home{position:absolute;top:max(20px,env(safe-area-inset-top));left:max(20px,env(safe-area-inset-left));display:inline-flex;align-items:center;gap:9px;min-height:48px;padding:0 18px;border:1px solid #dbe5f2;border-radius:999px;background:#fff;color:#2459c4;text-decoration:none;font-weight:800;box-shadow:0 5px 16px #1e293b18}
.missing-home:hover{background:#edf3ff}
.missing-start{width:min(90vw,410px);display:flex;flex-direction:column;align-items:stretch;gap:14px;padding:clamp(24px,5vw,36px);border:1px solid #e8e1d8;border-radius:28px;background:#fff;box-shadow:0 20px 60px #29344926;text-align:center}
.missing-start__icon{display:grid;place-items:center;width:68px;height:68px;margin:0 auto;border-radius:21px;background:#e9f0ff;color:#2459c4;font-size:42px;font-weight:900;box-shadow:inset 0 -4px 0 #ccdafe}
.missing-start h1{margin:0;font-size:27px;line-height:1.15}
.missing-start p{margin:0 0 6px;color:var(--kd-ink-muted);font-size:15px}
.missing-start label{font-size:16px;font-weight:800;text-align:left}
.missing-start select{min-height:52px;padding:8px 15px;border:2px solid #d6e1f3;border-radius:15px;background:#f8faff;color:var(--kd-ink);font:inherit;font-weight:700;cursor:pointer}
.missing-start .kd-btn{width:100%;margin-top:5px}

.kd-game{align-items:center}
.missing-stage{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:clamp(10px,2vh,20px);width:100%;height:100%;min-height:0}
.missing-prompt{margin:0;color:#2459c4;font-size:clamp(20px,3vw,31px);font-weight:800;text-align:center}
.missing-board{display:grid;grid-template-columns:repeat(var(--cols),minmax(0,1fr));gap:clamp(7px,1.3vw,14px);width:min(100%,600px)}
.missing-tile{position:relative;aspect-ratio:1;overflow:hidden;border:4px solid #fff;border-radius:clamp(12px,2vw,22px);background:#e6ecf7;box-shadow:0 5px 0 #47639633,0 12px 24px #263e6622}
.missing-tile img{display:block;width:100%;height:100%;object-fit:cover}
.missing-tile.is-hidden{display:grid;place-items:center;border:3px dashed #7195db;background:#e9f0ff;box-shadow:none}
.missing-tile.is-hidden img{visibility:hidden}
.missing-tile.is-hidden::after{content:"?";position:absolute;color:#4975d3;font-size:clamp(26px,6vw,72px);font-weight:900}
.missing-tile.is-revealed{border-color:#55be79}
.missing-answers{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(8px,1.5vw,14px);width:min(100%,540px);min-height:clamp(100px,16vh,160px);margin-top:clamp(12px,2.5vh,24px);padding:14px 18px 18px;border:2px solid #d0e0fa;border-radius:24px;background:#ffffffeb;box-shadow:0 12px 28px #294a8220,0 3px 7px #294a8210;visibility:hidden}
.missing-answers.is-ready{visibility:visible}
.missing-answers::before{content:"CHỌN ĐÁP ÁN";grid-column:1/-1;color:#5274bf;font-size:12px;font-weight:900;letter-spacing:.12em;text-align:center}
.missing-choice{aspect-ratio:1;min-width:0;overflow:hidden;padding:3px;border:3px solid #cddcf5;border-radius:18px;background:#fff;box-shadow:0 4px 0 #879ecb66;cursor:pointer;transition:transform .18s,border-color .18s,box-shadow .18s}
.missing-choice:hover:not(:disabled){transform:translateY(-3px);border-color:#4f7bea;box-shadow:0 7px 0 #879ecb66}
.missing-choice:focus-visible{outline:3px solid var(--kd-ring);outline-offset:3px}
.missing-choice img{display:block;width:100%;height:100%;object-fit:cover;border-radius:11px}
.missing-choice.is-correct{border-color:#2aae62;background:#e8f9ee}
.missing-choice.is-wrong{border-color:#e06565;background:#ffe9e9}
.missing-choice:disabled{cursor:default}
.missing-result-time{margin:8px 0 0;color:var(--kd-ink-muted);font-weight:700;font-variant-numeric:tabular-nums}
@media(max-width:480px){.kd-hud{gap:6px}.kd-hud__stats{gap:4px;padding:4px}.kd-hud__stats .kd-chip{min-height:38px;padding:0 9px;font-size:13px}.missing-controls{gap:4px;padding:4px}.missing-controls .kd-btn--icon{width:38px;height:38px;min-width:38px;min-height:38px;font-size:19px}.missing-controls #kd-replay{font-size:25px}.missing-controls .missing-back svg{width:19px;height:19px}.missing-tile{border-width:2px}.missing-choice{border-radius:12px}}
@media(max-width:560px){.kd-hud{display:grid;grid-template-columns:1fr auto;row-gap:8px}.kd-hud__stats{grid-column:1;grid-row:1;justify-self:start}.missing-controls{grid-column:2;grid-row:1}.missing-elapsed{position:static;transform:none;grid-column:1/-1;grid-row:2;justify-self:center;min-width:100px;min-height:38px;padding:0 12px;font-size:16px;box-shadow:none}.kd-hud__spacer{display:none}}
@media(max-height:760px){.missing-board{width:min(100%,480px)}.missing-answers{width:min(100%,450px);min-height:0;margin-top:10px;padding:10px 14px 14px}}
@media(max-height:590px){.missing-stage{gap:7px}.missing-board{width:min(100%,390px)}.missing-answers{width:min(100%,340px);min-height:0;margin-top:4px;padding:8px 10px 10px}.missing-prompt{font-size:19px}}
@media(prefers-reduced-motion:reduce){.missing-choice{transition:none}}