@keyframes scrolltop-in{0%{opacity:0;transform:translateY(8px)}
to{opacity:1;transform:none}
}
:root{--ink:#f2f5f8;--ink-dim:#b8c4d0;--panel:#2c3f4e;--panel-2:#3d596d;--panel-3:#477698;--line:#5f8aa9;--accent:#368fc9;--warn:#e8927c;--focus:#ffd479;--radius:6px;--bar-h:52px;--ctl-h:34px;--footer-h:32px;--rail-w:340px;--rail-w-compact:190px}
*{box-sizing:border-box}
html{height:100%}
body{margin:0;min-height:100%;background:radial-gradient(rgba(52,58,64,.92),rgba(0,0,0,.96)),url(/img/canvasbg.png)no-repeat center center,#000;background-attachment:fixed;color:var(--ink);font:16px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-text-size-adjust:100%}
.canvas,.hud,.panel,.topbar{-webkit-user-select:none;user-select:none}
#content,.move-chip,.move-field,.move-input-hint,.move-list,.solver-status{-webkit-user-select:text;user-select:text}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
button{font:inherit;color:inherit}
a{color:#9fd0ef}
.app-viewport{position:relative;height:100vh;min-height:360px}
#ui,.canvas{position:fixed;inset:0}
.canvas{display:block;touch-action:none}
#ui{pointer-events:none;z-index:2}
#ui>*{pointer-events:auto}
#topbarHost{position:relative;z-index:40}
.hud{z-index:10}
.panel{z-index:20}
.topbar{position:fixed;top:0;left:0;right:0;z-index:40;min-height:var(--bar-h);padding:6px 12px;background:rgba(20,26,33,.82);backdrop-filter:blur(6px);border-bottom:1px solid rgb(67 78 87 / 40%);display:grid;grid-template-columns:auto 1fr;align-items:center;gap:12px}
.brand{font-size:1.15rem;font-weight:700;text-decoration:none;color:var(--ink);letter-spacing:-.01em}
.brand-tld{color:var(--line);font-weight:400}
.bar-actions{text-align:right}
.bar-actions>*{vertical-align:middle}
.bar-label{display:inline-block;margin-right:4px;font-size:.85rem;color:var(--ink-dim)}
.bar-btn,.bar-select{display:inline-block;height:var(--ctl-h);margin-left:6px;background-color:var(--panel-2);color:var(--ink);border:1px solid transparent;border-radius:var(--radius);cursor:pointer;font-family:inherit;font-size:.92rem;line-height:calc(var(--ctl-h) - 2px)}
.bar-btn{text-decoration:none;padding:0 12px}
.bar-select{padding:0 26px 0 8px;-webkit-appearance:none;appearance:none;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 6'><path d='M1 1l4 4 4-4' fill='none' stroke='%23f2f5f8' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/></svg>");background-repeat:no-repeat;background-position:right 9px center;background-size:10px 6px}
.bar-btn:hover,.bar-select:hover{background-color:var(--panel-3)}
.hud{position:fixed;top:calc(var(--bar-h) + 12px);left:12px;display:grid;gap:8px;justify-items:start}
.hud-label{display:inline-block;margin-right:8px;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-dim)}
.hud-history,.hud-readout,.hud-speed{padding:6px 10px;background:rgba(20,26,33,.7);border-radius:var(--radius)}
.hud-readout:empty{display:none}
.speed-slider{width:130px;vertical-align:middle;accent-color:var(--panel-3)}
.speed-value{display:inline-block;min-width:62px;margin-left:8px;font-size:.85rem;color:var(--ink-dim)}
.icon-btn{width:38px;height:38px;margin-right:6px;font-size:1.2rem;background-color:var(--panel-2);border:0;border-radius:var(--radius);cursor:pointer;transition:opacity 120ms ease}
.icon-btn:last-child{margin-right:0}
.icon-btn:hover:not(:disabled){background-color:var(--panel-3)}
.icon-btn:disabled{opacity:.3;cursor:default}
.icon-redo,.icon-undo{background-repeat:no-repeat;background-position:center center;background-size:60% 60%}
.icon-undo{background-image:url(/img/buttonundo.svg)}
.icon-redo{background-image:url(/img/buttonredo.svg)}
.readout-label{margin-right:6px;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-dim)}
.readout-swatch{display:inline-block;width:16px;height:16px;margin-right:6px;vertical-align:-3px;border:1px solid var(--line);border-radius:3px}
.panel{position:fixed;left:50%;bottom:calc(var(--footer-h) + 12px);transform:translateX(-50%);width:min(960px,calc(100vw - 24px));max-height:58vh;overflow-y:auto;padding:12px;background:rgba(20,26,33,.88);border-radius:10px;backdrop-filter:blur(6px)}
.panel-main{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:8px}
.panel-row{margin-top:10px;text-align:center}
.panel-row .panel-btn{margin:0 4px}
.panel-btn{padding:10px 14px;background:var(--panel-2);border:0;border-radius:var(--radius);cursor:pointer;font-size:.95rem;text-align:center;line-height:1.2}
.icon{width:20px;height:20px;vertical-align:-5px;margin-right:9px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;opacity:.92}
.icon .fill{fill:currentColor;stroke:none}
.btn-label{vertical-align:middle}
.label-short{display:none}
.panel-main .panel-btn{text-align:left}
.panel-btn:hover{background:var(--panel-3)}
.panel-btn-accent{background:#35617f}
.panel-btn-warn{background:#6d4a45}
.panel-btn-warn:hover{background:#8b5a52}
.panel-btn-go{background:#2f6b4f}
.panel-btn-go:hover{background:#3d8a66}
.swatches{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:8px}
.swatch{padding:12px 8px;border:2px solid transparent;border-radius:var(--radius);cursor:pointer;font-weight:600;text-shadow:0 1px 2px rgba(0,0,0,.85)}
.swatch-on{border-color:currentColor}
.cp-errors{margin:10px 0 0;padding-left:20px;color:var(--warn);font-size:.85rem}
.move-list{max-height:26vh;overflow-y:auto;padding:6px;background:rgba(0,0,0,.3);border-radius:var(--radius)}
.move-list-empty{margin:6px;color:var(--ink-dim)}
.move-chip{display:inline-block;min-width:42px;margin:2px;padding:4px 7px;background:var(--panel);border:1px solid transparent;border-radius:4px;cursor:pointer;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.85rem}
.move-chip-start,.move-chip:hover{background:var(--panel-2)}
.move-chip-start{min-width:0;margin-right:6px;padding:4px 9px 4px 6px;font-family:inherit;font-size:.8rem}
.move-chip-current,.move-chip-start:hover,.size-links a:hover{background:var(--panel-3)}
.move-chip-start .icon{width:14px;height:14px;margin-right:4px;vertical-align:-2px}
.move-chip-current{border-color:var(--focus);font-weight:700}
.move-list-section{margin:8px 0 4px;color:var(--ink-dim);font-size:.8rem;text-transform:uppercase;letter-spacing:.08em}
.move-list-section hr{margin:0 0 4px;border:0;border-top:1px solid var(--line)}
.solver-status{margin:8px 0 0;font-size:.85rem;color:var(--ink-dim)}
.solver-status:empty{display:none}
.transport{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:8px;margin-top:10px}
.transport-btn{text-align:center}
.transport-top{display:block;white-space:nowrap}
.transport-top .btn-label+.icon{margin-right:0;margin-left:9px}
.move-tag{display:inline-block;min-width:40px;padding:1px 6px;background:rgba(0,0,0,.35);border-radius:4px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.85rem}
.transport-btn .move-tag{display:block;width:max-content;margin:5px auto 0}
.pattern-list{max-height:18vh;overflow-y:auto;margin-bottom:10px}
.pattern-btn{display:inline-block;margin:2px;padding:5px 10px;background:var(--panel);border:1px solid transparent;border-radius:4px;cursor:pointer;font-size:.85rem}
.pattern-btn:hover{background:var(--panel-2)}
.pattern-btn-on{background:var(--panel-3);border-color:var(--focus)}
.move-grid{overflow-x:auto;white-space:nowrap;padding-bottom:4px}
.move-col{display:inline-block;vertical-align:top;margin-right:6px;white-space:normal}
.move-col-multi{opacity:.92}
.move-btn{display:block;width:52px;margin-bottom:3px;padding:4px 0;border:0;border-radius:4px;cursor:pointer;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.8rem}
.move-col-center .move-btn{background:#c94fc9;color:#fff}
.confirm{text-align:center}
.confirm p{margin:4px 0 12px}
.move-input{margin-bottom:12px;padding:10px 12px;background:rgba(0,0,0,.28);border-radius:var(--radius)}
.move-input-label{display:block;margin-bottom:6px;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-dim)}
.move-input-row{display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center}
.move-field{width:100%;padding:8px 10px;background:#16202a;color:var(--ink);border:1px solid var(--line);border-radius:4px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.move-input-row .panel-btn{padding:8px 14px}
.move-input-hint{margin:8px 0 0;color:var(--ink-dim);font-size:.72rem;line-height:1.45}
.move-input-msg{margin:6px 0 0;color:var(--warn);font-size:.78rem}
.move-input-msg:empty{display:none}
.move-field[aria-invalid=true]{border-color:var(--warn)}
.scrolltop{position:fixed;right:16px;bottom:calc(var(--footer-h) + 16px);z-index:35;width:46px;height:46px;padding:0;background:rgba(20,26,33,.9);border:1px solid rgba(95,138,169,.5);border-radius:50%;cursor:pointer;color:var(--ink);backdrop-filter:blur(6px);animation:scrolltop-in 160ms ease both}
.scrolltop[hidden]{display:none}
.scrolltop:hover,.size-links a{background:var(--panel-2)}
@media (prefers-reduced-motion:reduce){.scrolltop{animation:none}
}
.scrolltop-ring{position:absolute;inset:0;width:100%;height:100%;transform:rotate(-90deg)}
.scrolltop-bar,.scrolltop-track{fill:none;stroke-width:2.3}
.scrolltop-track{stroke:rgba(95,138,169,.28)}
.scrolltop-bar{stroke:var(--accent);stroke-linecap:round;transition:stroke-dashoffset 90ms linear}
.scrolltop .icon{position:relative;width:20px;height:20px;margin:0;vertical-align:middle}
#content{position:relative;z-index:3;padding:40px 20px 80px;background:linear-gradient(rgba(10,14,18,.6),#0d1216 90px)}
#about{max-width:70ch;margin:0 auto;scroll-margin-top:calc(var(--bar-h) + 16px)}
#about h1{font-size:1.6rem;line-height:1.25;margin:0 0 12px}
#about h2{font-size:1.2rem;margin:28px 0 8px}
#about p,.error-card p,.error-sizes h2{color:var(--ink-dim)}
.key-legend,.size-links{margin:10px 0}
.key-legend kbd,noscript .noscript-note{border:1px solid var(--line);text-align:center}
.key-legend kbd{display:inline-block;min-width:26px;margin:2px 3px;padding:3px 6px;background:#000;border-radius:4px;font-family:ui-monospace,Menlo,Consolas,monospace;font-weight:700}
.size-links a{display:inline-block;margin:3px 6px 3px 0;padding:4px 10px;border-radius:var(--radius);color:var(--ink);text-decoration:none}
.site-footer{max-width:70ch;margin:32px auto 0;padding-top:16px;border-top:1px solid rgba(95,138,169,.35);font-size:.85rem;color:var(--ink-dim)}
.site-footer ul{margin:8px 0 0;padding:0}
.site-footer li{display:inline-block;margin-right:14px}
.error-page{position:relative;z-index:3;min-height:100vh;padding:calc(var(--bar-h) + 24px) 20px calc(var(--footer-h) + 40px);display:grid;place-items:center;text-align:center}
.error-card{max-width:620px;padding:34px 28px 30px;background:rgba(20,26,33,.86);border:1px solid rgba(95,138,169,.45);border-radius:14px;backdrop-filter:blur(6px)}
.error-code{margin:0;font-size:clamp(64px,16vw,108px);font-weight:800;line-height:1;letter-spacing:-.04em;color:var(--line);opacity:.55}
.error-card h1{margin:6px 0 10px;font-size:clamp(22px,5vw,30px);letter-spacing:-.01em}
.error-card p{margin:0 auto 18px;max-width:46ch}
.error-cube{width:96px;height:auto;margin:0 auto 4px;opacity:.95}
.error-cta,.footerNavi a,.footerNavi a:visited{display:inline-block;color:#fff;text-decoration:none}
.error-cta{margin-bottom:22px;padding:12px 28px;background:var(--panel-3);border-radius:8px;font-size:1.05rem;font-weight:600}
.error-cta:hover{background:#5a8cb0;text-decoration:none}
.error-sizes{margin:0;padding-top:18px;border-top:1px solid rgba(95,138,169,.3)}
.error-sizes h2{margin:0 0 10px;font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em}
noscript .noscript-note{position:relative;z-index:4;margin:calc(var(--bar-h) + 20px) auto 0;max-width:60ch;padding:16px;background:var(--panel);border-radius:var(--radius)}
@media (min-width:900px) and (min-height:560px){.panel{left:auto;right:12px;bottom:auto;top:calc(var(--bar-h) + 12px);transform:none;width:var(--rail-w);max-height:calc(100vh - var(--bar-h) - var(--footer-h) - 32px);transition:width 120ms ease}
.panel.panel-compact{width:var(--rail-w-compact)}
.panel-main{grid-template-columns:1fr}
.swatches,.transport{grid-template-columns:1fr 1fr}
.move-list{max-height:34vh}
.pattern-list{max-height:22vh}
.panel-moves .move-grid{max-width:100%}
}
div.footerNavi{position:fixed;bottom:0;right:0;left:0;margin:0;display:block;background:rgba(100,100,100,.6);text-align:center;z-index:4}
.footerNavi ul{max-height:var(--footer-h);overflow:hidden;margin:0;padding:0}
.footerNavi li{display:inline-block;color:#fff}
.footerNavi a,.footerNavi a:visited{margin:3px 10px;background:#3d596d;padding:0 10px;border-radius:5px;font-size:1em;line-height:1.5em}
.footerNavi a:hover{background-color:#477698;text-decoration:none;color:#fff}
#stpd_close svg{background-color:rgba(255,255,255,.5)!important}
.qc-cmp2-persistent-link{padding:2px 5px;text-decoration:none;background:#000;color:#fff!important;font-weight:400!important;opacity:.5;left:0;right:auto;font-size:13px}
.qc-cmp2-persistent-link:hover{opacity:.9}
#cube-solver\.com_970x90_sticky_anchorad_responsive_DFP{display:block;border:0}
#content{padding-bottom:calc(140px + var(--footer-h))}
@media (max-width:720px){:root{--bar-h:46px}
.topbar{grid-template-columns:1fr;gap:4px;padding:6px 10px}
.bar-actions{text-align:left}
.bar-actions>:first-child{margin-left:0}
.bar-label{display:none}
#fullscreenBtn{display:none}
.label-long{display:none}
.label-short{display:inline}
.hud{top:auto;bottom:calc(52vh + var(--footer-h) + 20px);left:10px;right:10px;grid-auto-flow:column;justify-content:start;align-items:center}
.hud-speed{display:none}
.hud-history{display:none}
.panel{max-height:52vh;bottom:calc(var(--footer-h) + 8px)}
.move-list{max-height:20vh}
.pattern-list{max-height:14vh}
.footerNavi a,.footerNavi a:visited{margin:3px 5px;font-size:.85em}
}
@media (max-width:420px){.panel-main{grid-template-columns:repeat(2,1fr)}
.panel-btn{padding:10px 8px;font-size:.88rem}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}
}