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#d0e4c6;border-radius:10px;align-items:center;gap:10px;padding:10px 14px;display:flex}.status-icon{color:var(--green-600);flex-shrink:0;font-size:14px;line-height:1}.solver-status{color:#1f4728;flex:1;margin:0;font-size:12.5px;font-weight:500;line-height:1.45}.btn-inline-retry{white-space:nowrap;border-radius:6px;min-height:auto;padding:4px 10px;font-size:11px;font-weight:600}.action-card{flex-direction:column;gap:10px;display:flex}.primary-action-wrap{gap:8px;display:flex}.btn-solve{color:#fff;cursor:pointer;letter-spacing:-.01em;background:linear-gradient(135deg,#245e35,#174223);border:0;border-radius:11px;justify-content:space-between;align-items:center;width:100%;min-height:48px;padding:13px 18px;font-size:15px;font-weight:700;display:flex;box-shadow:0 4px 14px #17422338,inset 0 1px #ffffff29}.btn-solve:hover:not(:disabled){background:linear-gradient(135deg,#2c7240,#1b4d29);transform:translateY(-1px);box-shadow:0 6px 18px #17422347,inset 0 1px #fff3}.btn-solve .btn-arrow{font-size:16px;transition:transform .15s}.btn-solve:hover .btn-arrow{transform:translate(3px)}.btn-cancel{border-radius:11px;padding:12px 16px;font-weight:600}.setup-actions{grid-template-columns:1fr 1fr;gap:8px;display:grid}.action-btn{border:1px solid var(--border);background:var(--surface);min-height:40px;color:var(--green-800);border-radius:10px;justify-content:center;align-items:center;gap:6px;padding:9px 14px;font-size:13px;font-weight:600;display:inline-flex}.action-btn:hover{background:var(--surface-muted);border-color:var(--green-400);color:var(--green-900)}.solution-card{background:linear-gradient(145deg,#f2f8ed,#e8f3e1);border:1.5px solid #bedbb1;border-radius:14px;flex-direction:column;gap:10px;padding:14px 16px;animation:.4s both fadeSlideUp;display:flex;box-shadow:0 4px 12px #14351d0d}.solution-header{justify-content:space-between;align-items:center;display:flex}.solution-title-wrap{align-items:center;gap:10px;display:flex}.solution-badge{background:var(--green-600);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;font-size:13px;font-weight:700;display:inline-flex}.solution-card h4{color:var(--green-900);margin:0;font-size:14px;font-weight:700}.solution-progress-text{color:var(--green-700);margin:0;font-size:12px;font-weight:600}.scrubber-wrap{padding:4px 0}.scrubber-wrap input[type=range]{width:100%;accent-color:var(--green-700);cursor:pointer;height:6px;margin:0}.playback-controls{align-items:center;gap:8px;display:flex}.playback-btn{border-radius:8px;min-height:36px;padding:8px 12px;font-size:13px;font-weight:600}.play-btn{flex:1;justify-content:center;min-height:36px;font-size:13px;font-weight:700}.move-list-wrap{border-top:1px solid #a0be9666;padding-top:8px}.move-list-label{color:var(--text-muted);margin-bottom:4px;font-size:11px;font-weight:600;display:block}.move-list{color:var(--green-900);word-break:break-word;background:#fff9;border:1px solid #a0be964d;border-radius:6px;max-height:72px;margin:0;padding:6px 10px;font-size:12px;line-height:1.5;overflow-y:auto}.config-section{border-top:1px solid var(--border-light);flex-direction:column;gap:12px;padding-top:14px;display:flex}.size-control{border:0;margin:0;padding:0}.size-control legend{color:var(--text-secondary);margin-bottom:6px;font-size:12px;font-weight:700}.size-options{grid-template-columns:repeat(4,1fr);gap:6px;display:grid}.size-btn{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);text-align:center;cursor:pointer;padding:7px 4px;transition:all .15s}.size-btn strong{color:var(--text);font-size:13px;display:block}.size-btn span{color:var(--text-muted);margin-top:2px;font-size:10px;display:block}.size-btn:hover{background:var(--surface-muted);border-color:var(--green-400)}.size-btn[aria-pressed=true]{border-color:var(--green-600);background:linear-gradient(145deg,var(--green-50),var(--green-100));box-shadow:inset 0 0 0 1px var(--green-600)}.size-btn[aria-pressed=true] strong{color:var(--green-800)}.size-custom-toggle[aria-expanded=true]{border-color:var(--green-500);background:var(--surface-muted)}.size-custom-toggle[aria-pressed=true]{border-color:var(--green-600);background:linear-gradient(145deg,var(--green-50),var(--green-100));box-shadow:inset 0 0 0 1px var(--green-600)}.size-custom-toggle[aria-pressed=true] strong{color:var(--green-800)}.custom-grid-panel{border:1px solid var(--border);border-radius:var(--radius-sm);background:linear-gradient(#f4f8f0,#edf4e7);margin-top:10px;padding:12px 14px;animation:.25s both fadeSlideUp}.custom-grid-panel[hidden]{display:none}.custom-grid-panel-header{border-bottom:1px solid var(--border-light);justify-content:space-between;align-items:center;margin-bottom:8px;padding-bottom:6px;display:flex}.custom-grid-panel-title{color:var(--green-800);align-items:center;gap:6px;font-size:12px;font-weight:700;display:inline-flex}.custom-grid-close-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:4px;padding:2px 7px;font-size:13px;font-weight:700;transition:all .15s}.custom-grid-close-btn:hover{background:var(--surface);color:var(--text)}.custom-grid-panel .drawer-desc{color:var(--text-secondary);margin:0 0 8px;font-size:11.5px}.custom-grid-panel .dimension-inputs{flex-wrap:wrap;align-items:flex-end;gap:8px;margin-bottom:12px;display:flex}.custom-grid-panel .dimension-inputs label{color:var(--text-secondary);flex-direction:column;gap:4px;font-size:11px;font-weight:700;display:flex}.custom-grid-panel .dimension-inputs input{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);text-align:center;width:58px;min-height:32px;padding:4px 6px;font-size:13px}.custom-grid-panel .dimension-inputs button{height:32px;padding:6px 14px;font-size:12px}.custom-grid-panel .goal-input-wrap label{color:var(--text-secondary);margin-bottom:4px;font-size:11px;font-weight:700;display:block}.custom-grid-panel .goal-input-wrap textarea{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);width:100%;color:var(--text);padding:6px 10px;font-family:monospace;font-size:12px}.custom-grid-panel .goal-actions{gap:8px;margin-top:6px;display:flex}.custom-grid-panel .goal-actions button{padding:5px 12px;font-size:11.5px}.custom-grid-panel .goal-summary{color:var(--text-muted);margin-top:6px;margin-bottom:0;font-size:11px}.solve-mode{flex-direction:column;gap:4px;display:flex}.solve-mode label{color:var(--text-secondary);font-size:12px;font-weight:700}.select-wrapper select{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);width:100%;min-height:38px;color:var(--text);padding:6px 10px;font-size:13px;font-weight:500}.select-wrapper select:focus{border-color:var(--green-500)}.mode-help-text{color:var(--text-muted);min-height:28px;margin:2px 0 0;font-size:11px;line-height:1.4}.drawers-section{border-top:1px solid var(--border-light);flex-direction:column;gap:6px;padding-top:12px;display:flex}.custom-board-drawer{border:1px solid var(--border-light);background:#fbfcf9;border-radius:9px;transition:all .15s;overflow:hidden}.custom-board-drawer[open]{background:var(--surface);border-color:var(--green-200);box-shadow:0 2px 8px #14351d0a}.custom-board-drawer summary{color:var(--text-secondary);cursor:pointer;justify-content:space-between;align-items:center;padding:9px 12px;font-size:12.5px;font-weight:600;list-style:none;display:flex}.custom-board-drawer summary::-webkit-details-marker{display:none}.custom-board-drawer summary:hover{color:var(--green-800);background:#dcebd240}.drawer-title{align-items:center;gap:7px;display:inline-flex}.drawer-icon{font-size:13px}.drawer-toggle{color:var(--text-muted);font-size:14px;font-weight:700;transition:transform .2s}.custom-board-drawer[open] .drawer-toggle{transform:rotate(45deg)}.badge-subtle{color:var(--text-muted);background:var(--surface-muted);border-radius:3px;padding:1px 5px;font-size:9px;font-weight:500}.drawer-body{border-top:1px solid var(--border-light);padding:10px 12px 12px;font-size:12px}.drawer-body label{color:var(--text-secondary);margin-bottom:6px;font-size:11.5px;display:block}.drawer-body textarea{border:1px solid var(--border);resize:vertical;background:var(--surface-alt);border-radius:6px;width:100%;margin-bottom:8px;padding:7px 9px;font-family:monospace;font-size:13px}.drawer-body textarea:focus{border-color:var(--green-500);background:#fff}.drawer-action-btn{border-radius:6px;width:100%;padding:7px 12px;font-size:12px;font-weight:600}.dimension-inputs{align-items:center;gap:8px;margin-bottom:10px;display:flex}.dimension-inputs label{align-items:center;gap:6px;margin:0;font-size:12px;display:inline-flex}.dimension-inputs input[type=number]{border:1px solid var(--border);border-radius:5px;width:54px;padding:4px 6px;font-size:13px}.dimension-inputs button{border-radius:6px;min-height:auto;margin-left:auto;padding:5px 10px;font-size:11.5px}.drawer-desc{color:var(--text-muted);margin:0 0 8px;font-size:11.5px}.goal-actions{gap:6px;margin-bottom:6px;display:flex}.goal-actions button{border-radius:6px;flex:1;min-height:auto;padding:5px 8px;font-size:11.5px}.goal-summary{color:var(--text-muted);margin:4px 0 0;font-size:11px}.upload-label{margin-bottom:4px;font-size:11.5px}.remove-photo-btn{margin-top:6px;font-size:11px}.control-footer{text-align:center;margin-top:auto;padding-top:8px}.privacy-note{color:var(--text-muted);align-items:center;gap:5px;font-size:11px;display:inline-flex}.noscript-notice{color:#7d5218;background:#fdf5e6;border:1px solid #ebd8b0;border-radius:8px;padding:10px;font-size:12px}.search-comparison{margin:32px 0 20px}.comparison-card{background:var(--surface);border:1px solid var(--border-light);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);padding:24px}.comparison-header h2{margin-bottom:6px;font-size:18px}.comparison-header p{color:var(--text-muted);margin-bottom:16px;font-size:13px}.search-comparison th,.search-comparison td{border-bottom:1px solid var(--border-light);padding:10px 14px}.search-comparison th{background:var(--surface-muted);color:var(--text-secondary);font-size:12px;font-weight:650}.search-comparison tr:last-child td{border-bottom:none}.search-comparison tr:hover td{background:var(--surface-alt)}.trust-row{color:var(--text-muted);justify-content:center;gap:40px;margin:30px 0 55px;font-size:12px;animation:.6s .5s both fadeSlideUp;display:flex}.trust-row>span{align-items:center;gap:8px;display:flex}.trust-row span span{color:var(--green-500);margin-right:0;font-size:14px;font-weight:700}.section-space{border-top:1px solid var(--border-light);padding-block:60px}.section-heading{margin-bottom:32px}.section-heading h2{margin-bottom:0}.section-heading .eyebrow{margin-bottom:10px}.steps{grid-template-columns:repeat(3,1fr);gap:24px;margin:0;padding:0;list-style:none;display:grid}.steps li{background:var(--surface);border:1px solid var(--border-light);border-radius:var(--radius-md);padding:28px 24px;transition:box-shadow .25s,transform .25s}.steps li:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.step-number{background:linear-gradient(135deg,var(--green-100),var(--green-50));border:1px solid var(--green-200);width:40px;height:40px;color:var(--green-600);border-radius:10px;justify-content:center;align-items:center;margin-bottom:18px;font-size:13px;font-weight:700;display:flex}.steps h3{margin-bottom:10px;font-size:17px}.steps p{margin-bottom:0;font-size:13px;line-height:1.65}.feature-grid{grid-template-columns:1fr 1fr;gap:40px;display:grid}.feature-grid>div{background:var(--surface);border:1px solid var(--border-light);border-radius:var(--radius-md);padding:32px 28px;transition:box-shadow .25s,transform .25s}.feature-grid>div:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.feature-grid p,.feature-grid li{font-size:14px}.feature-grid h3{margin-top:20px}.feature-grid ul{color:var(--text-secondary);padding-left:18px}.feature-grid li{margin-bottom:8px}.note{background:linear-gradient(135deg,var(--green-50),var(--surface-muted));border-left:3px solid var(--green-400);border-radius:0 10px 10px 0;padding:18px 22px;font-size:13px}.text-link{color:var(--green-700);text-underline-offset:4px;font-size:12px;font-weight:650;text-decoration:underline;transition:color .18s}.text-link:hover{color:var(--amber-600)}.text-link span{margin-left:10px;transition:transform .18s;display:inline-block}.text-link:hover span{transform:translate(2px,-2px)}.faq{grid-template-columns:1fr 1.6fr;gap:50px;display:grid}.faq summary{cursor:pointer;justify-content:space-between;align-items:center;gap:20px;padding:17px 0;list-style:none;transition:color .18s;display:flex}.faq summary:hover{color:var(--green-700)}.faq summary::-webkit-details-marker{display:none}.faq summary h3{letter-spacing:-.015em;margin:0;font-size:14px;line-height:1.5}.faq details{border-bottom:1px solid var(--border-light)}.faq details:first-child{border-top:1px solid var(--border-light)}.faq details p{padding-right:25px;font-size:13px}.faq summary>span{background:var(--surface-muted);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:14px;transition:transform .25s,background .18s;display:flex}.faq details[open] summary>span{background:var(--green-100);transform:rotate(45deg)}.related ul{grid-template-columns:1fr 1fr;gap:20px;margin:0;padding:0;list-style:none;display:grid}.related li{border:1px solid var(--border-light);border-radius:var(--radius-md);background:var(--surface);padding:28px;transition:box-shadow .25s,transform .25s}.related li:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.related h3{margin-bottom:10px;font-size:18px}.related p{font-size:13px}.site-footer{border-top:1px solid var(--border-light);justify-content:space-between;gap:30px;padding-block:36px;display:flex}.footer-brand{font-size:14px;font-weight:700}.site-footer p{margin:4px 0;font-size:11px}.site-footer>div:last-child{text-align:right}.site-footer span{color:var(--text-muted);font-size:10px}.article-hero{text-align:left;max-width:800px;margin:8px 0 24px}.article-hero h1{margin-bottom:12px;font-size:clamp(2.4rem,5vw,3.7rem)}.article-hero p{max-width:700px;font-size:17px}.article-layout{grid-template-columns:220px 1fr;align-items:start;gap:65px;display:grid}.toc{border-left:2px solid var(--green-200);padding-left:20px;font-size:12px;position:sticky;top:100px}.toc a{padding:8px 0;transition:color .18s;display:block}.toc a:hover{color:var(--green-700)}.toc strong{letter-spacing:.12em;margin-bottom:10px;font-size:10px;display:block}.prose section{margin-bottom:40px}.prose h2{margin-bottom:18px;font-size:26px}.prose h3{margin:24px 0 10px;font-size:18px}.prose p,.prose li{color:var(--text-secondary);font-size:15px}.prose li{margin-bottom:10px}.prose a{text-underline-offset:3px;color:var(--green-700);text-decoration:underline}.prose .note p{margin:0;font-size:13px}.guide-board{grid-template-columns:repeat(var(--guide-columns,3),42px);gap:5px;margin:18px 0;display:grid}.guide-board span{background:var(--green-100);text-align:center;border-radius:5px;padding:7px}.guide-board span[aria-label="Empty square"]{background:var(--green-200)}.prose figcaption{color:var(--text-secondary);margin-bottom:24px;font-size:14px}.skip-link{z-index:200;background:#fff;padding:10px;position:absolute;top:-100px}.skip-link:focus{top:10px;left:10px}@media(min-width:1024px){.hero{padding-top:55px;padding-bottom:48px}.play-area{padding-top:30px}.board{width:min(340px,calc(420px * var(--size) / var(--rows,var(--size))))}}@media(max-width:760px){.shell{width:calc(100% - 36px)}.header-inner{flex-wrap:wrap;justify-content:center;gap:4px;min-height:52px;padding:8px 0 6px}.brand{font-size:16px}.site-header nav{justify-content:center;gap:4px;width:100%;font-size:11px}.site-header nav a{padding:6px 10px}.breadcrumbs{padding-block:6px 2px;font-size:10px}.hero{padding:8px 0 16px}.hero h1{margin-bottom:8px;font-size:clamp(2.2rem,8vw,3rem)}.hero p{font-size:15px}.hero .eyebrow{margin-bottom:6px;font-size:9px}}@media(max-width:520px){.size-options{grid-template-columns:repeat(2,1fr)}}@media(max-width:760px){.solver{border-radius:var(--radius-md);grid-template-columns:1fr}.play-area{padding:22px}.board-top{margin-bottom:20px}.board{width:min(100%,300px,calc(420px * var(--size) / var(--rows,var(--size))));gap:6px;padding:10px}.tile{font-size:1.7rem}.board-caption{font-size:10px}.control-area{padding:22px}.control-heading h3{font-size:20px}.trust-row{flex-wrap:wrap;gap:12px;margin-bottom:30px;font-size:11px}.section-space{padding-block:40px}.steps{grid-template-columns:1fr;gap:16px}.steps li{grid-template-columns:40px 1fr;column-gap:16px;padding:20px;display:grid}.step-number{grid-row:span 2;margin:0}.steps h3{margin-bottom:6px}.steps p{grid-column:2}.feature-grid{grid-template-columns:1fr;gap:16px}.feature-grid>div{padding:24px 20px}.faq{grid-template-columns:1fr;gap:0}.related ul{grid-template-columns:1fr}.site-footer{flex-direction:column;gap:18px}.site-footer>div:last-child{text-align:left}.article-layout{grid-template-columns:1fr;gap:30px}.toc{position:static}.article-hero{margin:5px 0 30px}.article-hero p{font-size:15px}.prose h2{font-size:23px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.custom-grid p,.goal-summary{margin:6px 0;font-size:11px}.dimension-inputs{grid-template-columns:1fr 1fr;gap:10px;display:grid}.dimension-inputs input{border:1px solid var(--border);background:var(--surface-alt);border-radius:6px;width:100%;min-width:0;min-height:40px;padding:8px;display:block}.dimension-inputs input:focus{border-color:var(--green-500);background:var(--surface)}.board[data-dense=true]{gap:3px;padding:6px}.board[data-dense=true] .tile{border-bottom-width:2px;border-radius:4px;padding:0;font-size:clamp(.65rem,2vw,1rem)}.search-comparison{border:1px solid var(--border-light);border-radius:var(--radius-md);background:var(--surface);box-shadow:var(--shadow-sm);margin:24px 0;padding:22px}.search-comparison h2{font-size:20px}.search-comparison p{font-size:12px}.comparison-scroll{overflow-x:auto}.search-comparison table{border-collapse:collapse;text-align:left;width:100%;font-size:12px}.search-comparison td,.search-comparison th{border-bottom:1px solid var(--border-light);white-space:nowrap;padding:9px}.search-comparison th{color:var(--text);font-weight:650}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}.legal-links[data-astro-cid-5hce7sga]{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:12px}.legal-links[data-astro-cid-5hce7sga] a[data-astro-cid-5hce7sga]{text-decoration:underline;text-underline-offset:3px;font-size:13px}