:root{color-scheme:light;--ink:#153443;--gold:#efb344;--bg:#f3f6f8;--muted:#6e7f89}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Tahoma,Arial,sans-serif;font-size:16px}button,select{font:inherit;color:inherit}button{cursor:pointer;border:0;background:#fff;border-radius:12px;padding:12px 16px;transition:background .15s,transform .15s}button:hover{background-color:#e7edf0}button:focus-visible,select:focus-visible{outline:3px solid #d49318;outline-offset:3px}main{max-width:1080px;margin:auto;padding:0 32px}header{height:90px;display:flex;align-items:center;gap:24px;border-bottom:1px solid #dce4e9}.brand{display:flex;gap:10px;font-size:32px;color:var(--ink);text-decoration:none;font-weight:bold}.brand:first-letter{color:var(--gold)}.tag{color:var(--muted);font-size:14px}.icon{margin-right:auto;background:transparent;font-size:24px}.top{display:flex;align-items:center;justify-content:space-between;margin:32px 0 24px}.eyebrow{font-size:14px;color:var(--muted)}h1{font-size:30px;margin:8px 0 0}.difficulty{display:flex;align-items:center;gap:12px;font-size:14px}select{padding:12px;border:1px solid #d5dfe5;border-radius:12px;background:white}.game{display:grid;grid-template-columns:280px 1fr;gap:40px;align-items:start}figure{margin:0;background:white;padding:10px;border-radius:18px;box-shadow:0 5px 20px #17344309}figure img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:11px;display:block}figcaption{display:flex;align-items:center;justify-content:space-between;font-size:14px;padding:8px 3px 0}.textbutton{color:#687c88;background:transparent;font-size:14px;padding:10px}.photo-choices{display:flex;gap:6px;margin:16px 0}.photo-choices button{flex:1;padding:10px 4px;font-size:13px;background:transparent;border:1px solid #dce3e8}.photo-choices .active{background:var(--ink);color:white;border-color:var(--ink)}.instruction{font-size:14px;line-height:1.9;color:var(--muted)}.stats{display:flex;margin-top:26px;border-top:1px solid #dce4e9;padding-top:22px;gap:30px}.stats strong{display:block;font-size:24px;font-weight:500;direction:ltr}.stats span{display:block;font-size:12px;color:var(--muted);margin-top:8px}.workspace{min-width:0}.board-head,.tray-head{display:flex;justify-content:space-between;font-size:14px;margin-bottom:12px}.board-head span:last-child,.tray-head span:last-child{color:var(--muted);font-size:12px}#board{direction:ltr;position:relative;display:grid;grid-template-columns:repeat(var(--n),1fr);aspect-ratio:1;gap:4px;background:#dce6eb;padding:9px;border-radius:18px;box-shadow:inset 0 2px 4px #15344308;max-width:520px;margin:auto}.slot{padding:0;border-radius:5px;background:#edf2f5;position:relative;min-width:0;aspect-ratio:1}.slot::after{content:'+';font-size:18px;color:#bdcbd3}.slot.filled::after{content:''}.slot.filled{cursor:default}.slot.target{outline:3px solid var(--gold);z-index:1}.piece,.slot.filled{background-image:var(--photo);background-size:calc(var(--n)*100%) calc(var(--n)*100%);background-position:var(--x) var(--y);background-repeat:no-repeat}.piece{aspect-ratio:1;padding:0;touch-action:none;border-radius:7px;box-shadow:0 3px 7px #122d4020;position:relative}.piece.selected{outline:4px solid var(--gold);outline-offset:2px}.piece:active{cursor:grabbing}.piece:hover{transform:translateY(-2px);background-image:var(--photo)}.slot.guide{background-image:var(--photo);background-size:calc(var(--n)*100%) calc(var(--n)*100%);background-position:var(--x) var(--y);opacity:.34}.slot.filled{opacity:1}.actions{display:flex;gap:8px;margin:15px 0 25px}.actions button{flex:1;font-size:14px;border:1px solid #dce4e9;padding:11px 5px}.actions button:first-child{background:#fff1cf;border-color:#efd397}.actions button[aria-pressed=true]{background:#d8e7ef}.actions button:disabled{opacity:.5;cursor:default}#hints{font-size:12px;padding:2px 6px;border-radius:5px;background:#edcf8a}#tray{display:grid;direction:ltr;grid-template-columns:repeat(var(--n),1fr);gap:10px;min-height:80px;background:#e7edf1;border:1px dashed #cbd8e0;border-radius:16px;padding:14px}#message{font-size:14px;text-align:center;min-height:24px;color:var(--muted)}footer{display:flex;justify-content:space-between;margin:40px 0 22px;border-top:1px solid #dce4e9;padding-top:18px;color:#80909a;font-size:12px}footer span{color:#d4a13c}dialog{border:0;border-radius:24px;max-width:min(90vw,460px);padding:32px;text-align:center;color:var(--ink);box-shadow:0 25px 100px #0004}dialog::backdrop{background:#112b3988;backdrop-filter:blur(5px)}.celebrate{font-size:64px;color:#e9ac31}dialog p{line-height:1.9}.primary{background:var(--ink);color:white;display:block;width:100%;margin:20px 0 8px}.primary:hover{background:#24546b}#imageDialog{padding:12px}#imageDialog img{width:100%;display:block;border-radius:12px}#closeImage{position:absolute;left:20px;top:20px}.dragging{position:fixed;pointer-events:none;z-index:99;opacity:.9;transform:scale(1.08);box-shadow:0 10px 30px #0004}@media(min-width:800px){#tray{grid-template-columns:repeat(6,1fr)}.game{padding-left:25px}}@media(max-width:700px){main{padding:0 16px}header{height:64px}.brand{font-size:26px}.tag{font-size:12px}.top{margin:20px 0 16px;gap:10px}h1{font-size:23px}.eyebrow{font-size:12px}.difficulty{display:block;font-size:12px}.difficulty select{display:block;margin-top:5px;font-size:13px;padding:9px}.game{display:flex;flex-direction:column;gap:20px}.game aside{width:100%;display:grid;grid-template-columns:140px 1fr;gap:0 16px}figure{grid-row:1/4;padding:6px;border-radius:13px}figcaption{font-size:12px}.textbutton{font-size:12px;padding:6px}.photo-choices{margin:0;align-self:start;flex-wrap:wrap;gap:4px}.photo-choices button{font-size:12px;padding:9px 5px}.instruction{font-size:12px;margin:8px 0}.stats{margin:0;padding:8px 0 0;gap:22px}.stats strong{font-size:19px}.stats span{font-size:12px;margin-top:3px}.workspace{width:100%}.actions{margin-bottom:20px}#tray{gap:9px;padding:12px}footer{margin-top:22px}.board-head{margin-bottom:8px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* Interlocking puzzle geometry: SVGs extend beyond their grid cells. */
#board{gap:0;padding:0;isolation:isolate;border:9px solid #dce6eb;overflow:visible;border-radius:12px;background:#e8eff3}
#board::before{content:'';position:absolute;inset:0;background:var(--photo) center/100% 100%;opacity:0;pointer-events:none}
#board.show-guide::before{opacity:.2}
.slot{border-radius:0;background:transparent;border:1px dashed #c6d5dd;overflow:visible;touch-action:none}
.slot:hover{background-color:#ffffff30}.slot::after{pointer-events:none}.slot.occupied::after{content:none}.slot.occupied{background:transparent;border-color:transparent;cursor:grab}
.puzzle-art{width:100%;height:100%;display:block;overflow:visible;pointer-events:none;filter:drop-shadow(0 2px 2px #17344355)}
.slot .puzzle-art{position:absolute;width:152%;height:152%;left:-26%;top:-26%;filter:drop-shadow(0 1px 1px #17344322)}
.slot.selected{z-index:3;outline:3px solid #efb344;outline-offset:-3px;background:#fff0bc66}.slot.selected .puzzle-art{filter:drop-shadow(0 0 3px #efb344)}
.piece{background:none!important;box-shadow:none;border-radius:10px;padding:0;min-width:0}.piece:hover{background:#ffffff66!important}.piece.selected{background:#fff0bc!important;outline:2px solid #efb344}
#tray{gap:4px;padding:10px;min-height:100px;grid-template-columns:repeat(3,1fr)}#tray.empty{display:flex;align-items:center;justify-content:center}#tray.empty::after{content:attr(data-empty);font-size:14px;color:#6e7f89;pointer-events:none}#tray.target{outline:3px solid #efb344}
#returnPiece{width:100%;margin:0 0 18px;background:#e2eaf0;border:1px solid #cbd8df;font-size:14px}#returnPiece:disabled{opacity:.45;cursor:default}
.dragging{aspect-ratio:1;background:none;box-shadow:none;transform:scale(1.1);pointer-events:none;z-index:999}.dragging .puzzle-art{filter:drop-shadow(0 6px 8px #0006)}
#board.solved .puzzle-art{filter:none}#board.solved .slot{border:0}
@media(min-width:800px){#tray{grid-template-columns:repeat(5,1fr)}}
.slot{border:0;box-shadow:inset 0 0 0 1px #c6d5dd80}.slot.occupied{box-shadow:none}
/* More compact play surface and a persistent, scrollable piece drawer. */
header{gap:16px}.collection-button{margin-right:auto;background:#153443;color:#fff;font-size:14px;display:flex;gap:12px;align-items:center}.collection-button:hover{background:#24546b}.collection-button span{color:#ffd77e;font-size:12px}.icon{margin-right:0}.stats{gap:22px}.stats strong{font-size:22px}.stats span{white-space:nowrap}.board-wrap{padding:14px;border-radius:24px;background:#dbe6ec;box-shadow:0 12px 30px #1534430c}#board{border:0;border-radius:0}.session-bar{display:flex;justify-content:space-between;font-size:12px;color:#70838e;gap:8px;margin-top:12px}.actions{margin:14px 0 10px}.edit-actions{display:flex;gap:8px;margin-bottom:20px}.edit-actions button,#returnPiece{margin:0;flex:1;width:auto;font-size:14px;padding:10px;background:#e2eaf0;border:1px solid #cbd8df}button:disabled{opacity:.45;cursor:default}.tray-tools{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;gap:12px}.filters{display:flex;padding:4px;background:#dfe8ee;border-radius:12px;gap:4px}.filters button{font-size:13px;background:none;padding:8px 12px}.filters button[aria-pressed=true]{background:#fff;box-shadow:0 2px 5px #15344312}.tray-tools>button{font-size:13px;background:transparent}#tray{max-height:260px;overflow-y:auto;overscroll-behavior:contain;align-content:start;scrollbar-width:thin;scrollbar-color:#9eb3bf transparent}#tray .piece[hidden]{display:none}#tray.empty{align-items:center}.dialog-head{display:flex;justify-content:space-between;align-items:center;gap:20px}.dialog-head h2{margin:0}.dialog-head button{background:#edf2f5}#albumDialog{max-width:900px;width:92vw;text-align:right}#albumDialog>p{color:#6e7f89;font-size:14px}#albumCards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.album-card{background:#f0f4f6;border-radius:16px;padding:10px}.album-card img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:10px}.album-card h3{font-size:16px}.album-levels{display:flex;flex-wrap:wrap;gap:5px}.album-levels button{font-size:12px;padding:8px}.album-levels button.finished{background:#153443;color:#ffd77e}.win-stars{color:#d99619;font-size:38px;letter-spacing:6px}#winDetails p{margin:8px;font-size:14px}#winDetails small{color:#6e7f89}.celebrating .celebrate{animation:cheer .6s ease-in-out 3}@keyframes cheer{50%{transform:rotate(20deg) scale(1.25)}}
@media(max-width:700px){header{height:58px;gap:8px}.tag{display:none}.collection-button{padding:9px 10px;font-size:13px;gap:8px}.icon{padding:6px 10px}.top{margin:14px 0}.game{gap:14px}.game aside{grid-template-columns:112px 1fr;gap:0 12px}figure{grid-row:1/4}.instruction{font-size:12px;line-height:1.7}.stats{gap:16px;padding-top:5px}.stats strong{font-size:17px}.stats span{font-size:12px}figcaption{flex-wrap:wrap;justify-content:center;padding:2px 0 0}figcaption .textbutton{padding:4px}.board-wrap{padding:11px;border-radius:17px}.board-head{margin-bottom:8px}.session-bar{font-size:12px;flex-wrap:wrap;margin-top:8px}.actions{margin:10px 0 8px}.edit-actions{margin-bottom:14px}.tray-head{margin-bottom:8px}.tray-tools{margin-bottom:8px}#tray{grid-template-columns:repeat(4,1fr);max-height:190px;padding:6px;gap:0;min-height:88px}.workspace{position:relative}#message{font-size:13px;line-height:1.6}.album-card h3{font-size:14px}#albumCards{grid-template-columns:1fr}.album-card{display:grid;grid-template-columns:90px 1fr;gap:0 12px}.album-card img{grid-row:1/3}.album-card h3{margin:8px 0}.album-levels{align-self:start}#albumDialog{padding:20px}.filters button{font-size:12px;padding:8px 10px}}
@media(prefers-reduced-motion:reduce){.celebrating .celebrate{animation:none}}