/* Code with Duck: Board Explorer styles */
:root{--bg:#fff7dc;--card:#ffffff;--ink:#1d2330;--mut:#566074;--acc:#f2b705;--accink:#1d2330;--pink:#e63f8c;--line:#eadfb8;--stage:#d9f2fb;--code:#10171f;--codeink:#e8f1ff;
box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0a1119;--card:#121c28;--ink:#eef3f9;--mut:#9fb0c4;--acc:#ffd23f;--pink:#ff6fae;--line:#233346;--stage:#0e2233;--code:#070c12;color-scheme:dark}}
:root[data-theme="dark"]{--bg:#0a1119;--card:#121c28;--ink:#eef3f9;--mut:#9fb0c4;--acc:#ffd23f;--pink:#ff6fae;--line:#233346;--stage:#0e2233;--code:#070c12;color-scheme:dark}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.55 Fredoka,"Segoe UI",system-ui,sans-serif;overflow-x:hidden}
.bub{position:fixed;border-radius:50%;background:var(--stage);opacity:.7;z-index:0;animation:fl 14s ease-in-out infinite}
.bub:nth-child(1){width:140px;height:140px;left:-40px;top:30%}.bub:nth-child(2){width:90px;height:90px;right:6%;top:12%;animation-delay:-4s}.bub:nth-child(3){width:60px;height:60px;right:30%;bottom:6%;animation-delay:-8s}
@keyframes fl{50%{transform:translateY(-26px)}}
header{position:relative;z-index:1;display:flex;align-items:center;gap:14px;padding:18px clamp(16px,4vw,40px);flex-wrap:wrap}
.logo{width:56px;height:56px;border-radius:50%;animation:bob 3s ease-in-out infinite;cursor:pointer;box-shadow:0 6px 18px rgba(242,183,5,.35)}
.logo:active{animation:spin .6s}
@keyframes bob{50%{transform:translateY(-5px) rotate(-5deg)}}@keyframes spin{to{transform:rotate(360deg)}}
h1{margin:0;font-size:clamp(1.5rem,3.6vw,2.3rem);font-weight:700;letter-spacing:-.01em;line-height:1.1}
.sub{margin:0;color:var(--mut);font-size:.95rem}
.sp{flex:1}
button{font:inherit;color:inherit;cursor:pointer}
.btn{border:2px solid var(--line);background:var(--card);border-radius:999px;padding:8px 16px;font-weight:500;transition:transform .15s,background .15s,border-color .15s}
.btn:hover{transform:translateY(-2px);border-color:var(--acc)}
.btn.on{background:var(--acc);color:var(--accink);border-color:var(--acc)}
:focus-visible{outline:3px solid var(--pink);outline-offset:2px}
main{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:22px;padding:0 clamp(16px,4vw,40px) 40px;align-items:start}
.stage{background:var(--stage);border-radius:28px;padding:14px;border:2px solid var(--line)}
.tools{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px;align-items:center}
.tools input{flex:1;min-width:140px;border:2px solid var(--line);background:var(--card);color:var(--ink);border-radius:999px;padding:8px 16px;font:inherit}
svg.board{width:100%;height:auto;display:block;touch-action:manipulation}
.pin{cursor:pointer;fill-opacity:.28;stroke-width:2;transform-box:fill-box;transform-origin:center;transition:transform .15s,fill-opacity .2s,opacity .2s;animation:idle 2.6s ease-in-out infinite;animation-delay:calc(var(--i)*70ms)}
@keyframes idle{50%{stroke-opacity:.35}}
.pin:hover,.pin:focus-visible{transform:scale(1.4);fill-opacity:.7}
.pin.sel{fill-opacity:.9;transform:scale(1.5);filter:drop-shadow(0 0 6px currentColor)}
.pin.dim,.part.dim{opacity:.12}
.part{cursor:pointer;fill:transparent;stroke:var(--acc);stroke-width:2;stroke-dasharray:6 5;stroke-opacity:.55;transition:fill .2s,stroke-opacity .2s;animation:march 1.4s linear infinite}
@keyframes march{to{stroke-dashoffset:-22}}
.part:hover,.part:focus-visible{fill:rgba(255,210,63,.22);stroke-opacity:1}
.part.sel{fill:rgba(255,210,63,.3);stroke-opacity:1;stroke-dasharray:none;filter:drop-shadow(0 0 7px #ffd23f)}
.rip{fill:none;stroke:#ffd23f;stroke-width:2.5;transform-box:fill-box;transform-origin:center;animation:rip .7s ease-out forwards;pointer-events:none}
@keyframes rip{from{transform:scale(1);opacity:1}to{transform:scale(4);opacity:0}}
.flow{fill:none;stroke:#ffd23f;stroke-width:5;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3 14;opacity:0;pointer-events:none;filter:drop-shadow(0 0 5px #ffd23f)}
.flowing .flow{opacity:1;animation:go .8s linear infinite}
@keyframes go{to{stroke-dashoffset:-34}}
.fl-t{font:600 11px Fredoka,sans-serif;fill:#ffd23f;opacity:0;pointer-events:none}.flowing .fl-t{opacity:1}
.tip{position:fixed;z-index:9;pointer-events:none;background:var(--ink);color:var(--bg);padding:4px 10px;border-radius:10px;font-size:.85rem;font-weight:500;opacity:0;transform:translateY(4px);transition:opacity .12s,transform .12s;white-space:nowrap}
.tip.show{opacity:1;transform:none}
.legend{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.chip{display:inline-flex;align-items:center;gap:6px;border:2px solid var(--line);background:var(--card);border-radius:999px;padding:3px 12px;font-size:.85rem}
.chip i{width:10px;height:10px;border-radius:50%;background:var(--c)}
button.chip.on{border-color:var(--c);background:color-mix(in srgb,var(--c) 18%,var(--card))}
aside{background:var(--card);border:2px solid var(--line);border-radius:28px;padding:20px;position:sticky;top:12px;min-height:380px}
.duck{display:flex;gap:12px;align-items:flex-start;margin-bottom:14px}
.duck img{width:46px;height:46px;border-radius:50%;flex:none}
.say{background:var(--bg);border:2px solid var(--line);border-radius:6px 18px 18px 18px;padding:8px 12px;font-size:.92rem;color:var(--mut)}
.pop>*{animation:pop .45s cubic-bezier(.2,1.4,.4,1) both}.pop>*:nth-child(2){animation-delay:.05s}.pop>*:nth-child(3){animation-delay:.1s}.pop>*:nth-child(4){animation-delay:.15s}.pop>*:nth-child(5){animation-delay:.2s}
@keyframes pop{from{opacity:0;transform:translateY(14px) scale(.96)}}
.badge{display:inline-block;padding:2px 12px;border-radius:999px;font-weight:600;font-size:.82rem;background:color-mix(in srgb,var(--c) 22%,transparent);color:var(--ink);border:2px solid var(--c)}
h2{margin:8px 0 2px;font-size:1.7rem;line-height:1.15}
.gp{color:var(--mut);margin:0 0 10px}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0}
.warn{border-left:5px solid var(--pink);background:color-mix(in srgb,var(--pink) 12%,transparent);padding:8px 12px;border-radius:8px;margin:12px 0;font-size:.92rem}
ul.sp2{margin:8px 0;padding-left:20px;color:var(--mut)}
pre{position:relative;margin:12px 0 0;background:var(--code);color:var(--codeink);border-radius:14px;padding:14px;font:400 .82rem/1.5 "JetBrains Mono",ui-monospace,monospace;overflow-x:auto}
pre button{position:absolute;right:8px;top:8px;background:var(--acc);color:var(--accink);border:0;border-radius:8px;padding:2px 10px;font-size:.78rem;font-weight:600}
@media (max-width:920px){main{grid-template-columns:minmax(0,1fr)}aside{position:static;min-height:0}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
svg.board{touch-action:none;cursor:grab}svg.board:active{cursor:grabbing}
.part,.pin,.rip{vector-effect:non-scaling-stroke}
svg.in{animation:sw .5s ease-out}@keyframes sw{from{opacity:0;transform:translateX(24px) scale(.97)}}
.tabs{position:relative;z-index:1;display:flex;gap:8px;overflow-x:auto;padding:0 clamp(16px,4vw,40px) 14px;scrollbar-width:thin}
.tabs .btn{white-space:nowrap}
.stage{position:relative}
.zoom{position:absolute;right:24px;top:70px;display:flex;flex-direction:column;gap:6px;z-index:2}
.zoom .btn{width:42px;height:42px;padding:0;font-size:1.3rem;line-height:1}
.hint{margin:8px 0 0;color:var(--mut);font-size:.85rem}
select.btn{appearance:auto}
.ctl{display:flex;gap:8px;flex-wrap:wrap}
.btn[aria-pressed="false"]{opacity:.6}
section.more{position:relative;z-index:1;padding:0 clamp(16px,4vw,40px) 30px;display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}
.card{background:var(--card);border:2px solid var(--line);border-radius:28px;padding:20px}
.card h3{margin:0 0 12px;font-size:1.3rem}
.fc{display:flex;justify-content:space-between;gap:12px;padding:7px 0;border-bottom:1px dashed var(--line)}
.fc:last-child{border:0}.fc b{font-weight:600}.fc span{color:var(--mut);text-align:right}
ol.qs{margin:0;padding-left:22px;color:var(--mut)}ol.qs li{margin:6px 0}
.pin{fill-opacity:.5}.part{stroke-opacity:.9;stroke-width:2.5}.num{pointer-events:none}.num circle{fill:#ffd23f;stroke:#1d2330;stroke-width:1.5}.num text{fill:#1d2330;font-weight:700;text-anchor:middle;dominant-baseline:central}button.chip{cursor:pointer;font:inherit}button.chip:hover{border-color:var(--acc)}
footer{position:relative;z-index:1;text-align:center;color:var(--mut);padding:10px 16px 30px;font-size:.9rem}
@media (max-width:600px){.zoom{top:64px;right:20px}.zoom .btn{width:38px;height:38px}aside{padding:16px}}