:root{
  --tool-navy:#4577be;
  --tool-blue:#4577be;
  --tool-blue-dark:#4577be;
  --tool-blue-soft:#eaf3fb;
  --tool-sky:#f4f9fc;
  --tool-ink:#32373c;
  --tool-muted:#607080;
  --tool-line:#d7e5ef;
  --tool-good:#258b50;
  --tool-warn:#b76c0b;
  --tool-bad:#c5423f;
}
body.tools-page{background:#fff;color:var(--tool-ink)}
.tools-page button,.tools-page input,.tools-page select,.tools-page textarea{font:inherit}
.tools-page button,.tools-page a{touch-action:manipulation}
.tools-page [hidden]{display:none!important}
.tools-page :focus-visible{outline:3px solid rgba(69,119,190,.36);outline-offset:2px}
.tools-main{min-height:66vh}
.tools-hero{padding:46px 0;border-bottom:1px solid var(--tool-line);background:#f4f9fc}
.tools-crumbs{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:.82rem;color:#718397;margin:0 0 18px}
.tools-crumbs a{font-weight:600}
.tools-eyebrow{font-size:.73rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--tool-blue-dark);margin-bottom:10px}
.tools-hero h1{font-size:clamp(2.15rem,4.2vw,3.75rem);letter-spacing:-.04em;max-width:760px;margin:0 0 16px}
.tools-hero .lead{font-size:clamp(1.05rem,1.5vw,1.22rem);line-height:1.62;max-width:760px;color:#4c5b67}
.action-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.btn,.link-btn{min-height:44px;border-radius:9px;border:1px solid var(--tool-line);padding:10px 16px;background:#fff;color:var(--tool-blue-dark);font-weight:700;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;line-height:1.25;transition:background .15s,border-color .15s,transform .15s,color .15s}
.btn:hover,.link-btn:hover{border-color:var(--tool-blue);text-decoration:none;transform:translateY(-1px)}
.btn.primary,.link-btn.primary{background:var(--tool-blue);border-color:var(--tool-blue);color:#fff}
.btn.primary:hover,.link-btn.primary:hover{background:var(--tool-blue-dark)}
.btn.ghost,.link-btn.ghost{background:transparent}
.btn.danger{color:var(--tool-bad)}
.btn:disabled{opacity:.48;cursor:not-allowed;transform:none}
.link-btn[aria-disabled="true"]{opacity:.48;cursor:not-allowed;transform:none}
.privacy-strip{border-bottom:1px solid var(--tool-line);background:#fff}
.privacy-strip .wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.privacy-point{min-height:76px;padding:15px 20px;display:flex;align-items:center;gap:12px;border-right:1px solid var(--tool-line)}
.privacy-point:first-child{border-left:1px solid var(--tool-line)}
.privacy-point b{display:block;color:var(--tool-ink);font-size:.88rem}
.privacy-point span{display:block;color:var(--tool-muted);font-size:.78rem;line-height:1.4}
.privacy-icon{width:34px;height:34px;flex:0 0 34px;border-radius:50%;display:grid;place-items:center;background:var(--tool-blue-soft);color:var(--tool-blue-dark);font-weight:800}

.tools-section{padding:64px 0}
.tools-section.tint{background:var(--tool-sky);border-top:1px solid var(--tool-line);border-bottom:1px solid var(--tool-line)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:28px;margin:0 0 26px;padding-bottom:16px;border-bottom:2px solid var(--tool-line)}
.section-head h2{font-size:clamp(1.65rem,3vw,2.5rem);letter-spacing:-.025em}
.section-head p{max-width:620px;color:var(--tool-muted)}
.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.tool-card{position:relative;min-height:260px;padding:22px;border:1px solid var(--tool-line);border-radius:14px;background:#fff;box-shadow:0 9px 28px -23px rgba(23,55,94,.55);display:flex;flex-direction:column;color:inherit;transition:transform .16s,border-color .16s,box-shadow .16s}
.tool-card:hover{transform:translateY(-3px);border-color:#9ab9d7;box-shadow:0 18px 34px -24px rgba(23,55,94,.7);text-decoration:none}
.tool-card.featured{grid-column:span 2;background:linear-gradient(135deg,#4577be,#4577be);color:#e8f2fb;border-color:#4577be}
.tool-card.featured h3,.tool-card.featured .tool-number{color:#fff}
.tool-card.featured p{color:#d8e7f4}
.tool-card-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:28px}
.tool-number{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--tool-blue-dark);font-weight:800}
.tool-state{font-size:.68rem;font-weight:800;color:var(--tool-good);background:#e7f6ed;border-radius:99px;padding:5px 9px}
.tool-card h3{font-size:1.34rem;margin-bottom:9px}
.tool-card p{font-size:.93rem;line-height:1.55;color:var(--tool-muted);max-width:53ch}
.tool-card .card-link{margin-top:auto;padding-top:22px;font-weight:800;color:var(--tool-blue)}
.tool-card.featured .card-link{color:#fff}
.workflow{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:workflow}
.workflow article{counter-increment:workflow;padding:24px;border-top:4px solid var(--tool-blue);background:#fff;border-radius:0 0 12px 12px;box-shadow:0 8px 24px -22px rgba(23,55,94,.5)}
.workflow article:before{content:counter(workflow);width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--tool-blue-soft);color:var(--tool-blue-dark);font-weight:800;margin-bottom:16px}
.workflow h3{font-size:1.05rem;margin-bottom:7px}
.workflow p{font-size:.9rem;color:var(--tool-muted)}


.tool-intro{padding:28px 0 22px;border-bottom:1px solid var(--tool-line);background:#fff}
.tool-intro h1{font-size:clamp(2rem,3.6vw,3.2rem);letter-spacing:-.035em;margin:4px 0 10px}
.tool-intro .lead{font-size:1.04rem;max-width:820px;color:#516171}

@media(min-width:781px){
  body.tools-page .tool-intro,body.tools-page[data-tool-page="hub"] .tools-hero{padding:42px 0 38px}
  body.tools-page .tool-intro>.wrap,body.tools-page[data-tool-page="hub"] .tools-hero>.wrap{display:flex;flex-direction:column;align-items:center;text-align:center}
  body.tools-page .tool-intro .tools-crumbs,body.tools-page[data-tool-page="hub"] .tools-hero .crumbs{justify-content:center}
  body.tools-page .tool-intro h1,body.tools-page[data-tool-page="hub"] .tools-hero h1{max-width:980px}
  body.tools-page .tool-intro .lead,body.tools-page[data-tool-page="hub"] .tools-hero .lead{margin-inline:auto}
}
.tool-shell{display:grid;grid-template-columns:minmax(360px,650px) minmax(320px,1fr);gap:24px;align-items:start;padding:20px 0 56px}
.board-column{min-width:0;position:sticky;top:92px}
.board-frame{border:1px solid var(--tool-line);border-radius:14px;padding:12px;background:#f7fbfd;box-shadow:0 12px 34px -28px rgba(23,55,94,.7)}
.board-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px;min-height:44px}
.board-toolbar strong{font-size:.9rem;color:var(--tool-navy)}
.board-toolbar .mini-actions{display:flex;gap:7px}
.btn.icon{width:44px;padding:0;font-size:1.08rem}

.cd-board{width:100%;max-width:626px;aspect-ratio:1;display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);container-type:inline-size;border-radius:8px;overflow:hidden;border:0;box-shadow:inset 0 0 0 1px rgba(50,55,60,.18);background:#fff;user-select:none;touch-action:pan-y}
.cd-square{position:relative;border:0;border-radius:0;min-width:0;min-height:0;padding:0;display:grid;place-items:center;background:#fff;color:#101820;cursor:pointer}
.cd-square.has-piece{touch-action:none}
.cd-square.dark{background:#4577be}
.cd-square.light{background:#fff}
.cd-square:hover:after,.cd-square.selected:after,.cd-square.legal:after,.cd-square.last:after{content:"";position:absolute;inset:4px;border-radius:6px;pointer-events:none}
.cd-square:hover:after{box-shadow:inset 0 0 0 2px rgba(23,55,94,.4);z-index:2}

.cd-square.selected:after{background:rgba(69,119,190,.2);box-shadow:inset 0 0 0 3px #4577be}
.cd-square.legal:after{width:22%;height:22%;inset:39%;border-radius:50%;background:rgba(23,55,94,.48);z-index:2}
.cd-square.last:after{background:rgba(69,119,190,.3)}

.cd-piece{font-size:10.6cqw;line-height:1;pointer-events:none;paint-order:stroke fill;position:relative;z-index:1}
.cd-piece.black{color:#000;-webkit-text-stroke:.02em rgba(255,255,255,.5);text-shadow:0 1px 1px rgba(255,255,255,.2)}
.cd-piece.white{color:#fff;-webkit-text-stroke:.043em #14161b;text-shadow:0 1px 1px rgba(20,24,28,.45)}
.cd-square.drag-source .cd-piece{opacity:.24}
.cd-board.is-dragging,.cd-board.is-dragging .cd-square{cursor:grabbing}
.cd-drag-ghost{position:fixed;z-index:10060;display:grid;place-items:center;pointer-events:none;line-height:1;paint-order:stroke fill;filter:drop-shadow(0 8px 9px rgba(20,31,43,.3));will-change:left,top}
.cd-drag-ghost.black{color:#000;-webkit-text-stroke:.02em rgba(255,255,255,.62)}
.cd-drag-ghost.white{color:#fff;-webkit-text-stroke:.043em #14161b}
.coord{position:absolute;font-size:clamp(.48rem,2.4cqw,.67rem);font-weight:800;line-height:1;opacity:.8;pointer-events:none;z-index:2}
.coord.file{right:4px;bottom:3px}.coord.rank{left:4px;top:4px}
.cd-square.dark .coord{color:#f5f8fa}.cd-square.light .coord{color:#4577be}
.board-status{display:flex;min-width:0;flex-wrap:wrap;justify-content:space-between;gap:8px;padding:10px 3px 0;font-size:.78rem;color:var(--tool-muted)}
.board-status>*{min-width:0;max-width:100%;overflow-wrap:anywhere}
.board-status strong{color:var(--tool-navy)}
.inspector{min-width:0;border:1px solid var(--tool-line);border-radius:14px;background:#fff;box-shadow:0 12px 34px -30px rgba(23,55,94,.75);overflow:hidden}
.inspector-head{padding:18px 20px;background:var(--tool-navy);color:#fff;display:flex;justify-content:space-between;gap:12px;align-items:center}
.inspector-head h2{color:#fff;font-size:1.24rem}
.inspector-head span{font-size:.7rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em;color:#cce0f2}
.panel{padding:20px;border-top:1px solid var(--tool-line)}
.panel:first-of-type{border-top:0}
.panel h3{font-size:.96rem;margin-bottom:12px;display:flex;align-items:center;justify-content:space-between;gap:10px}
.step{display:inline-grid;place-items:center;width:25px;height:25px;border-radius:6px;background:var(--tool-blue-soft);color:var(--tool-blue-dark);font-size:.75rem;margin-right:7px}
.field{display:grid;gap:6px;margin-bottom:14px}
.field:last-child{margin-bottom:0}
.field label,.field .label{font-size:.76rem;font-weight:800;color:var(--tool-navy);letter-spacing:.02em}
.field label .label-hint{font-weight:600;color:var(--tool-muted);letter-spacing:0;text-transform:none}
.field small,.help{font-size:.76rem;line-height:1.45;color:var(--tool-muted)}
.input,.select,.textarea{width:100%;min-height:44px;border:1px solid #cddde9;border-radius:8px;background:#fff;color:var(--tool-ink);padding:10px 12px;outline:none}
.textarea{min-height:112px;resize:vertical;line-height:1.45}
.input:focus,.select:focus,.textarea:focus{border-color:var(--tool-blue);box-shadow:0 0 0 3px rgba(69,119,190,.12)}
.input[aria-invalid="true"],.select[aria-invalid="true"],.batch-table input[aria-invalid="true"]{border-color:var(--tool-bad);background:#fff7f6;box-shadow:0 0 0 2px rgba(197,66,63,.08)}
.select:disabled{background:#f2f5f7;color:#8a969f;cursor:not-allowed}
.action-row.compact{margin-top:12px}
.segmented{display:grid;grid-template-columns:repeat(var(--segments,3),1fr);gap:7px}
.segmented button,.choice{min-height:44px;border:1px solid var(--tool-line);border-radius:8px;background:#fff;color:var(--tool-ink);font-weight:600;cursor:pointer;padding:8px}
.segmented button.active,.choice.active{background:var(--tool-blue-soft);border-color:var(--tool-blue);color:var(--tool-blue-dark)}
.source-tabs{display:flex;gap:7px;margin-bottom:12px}
.source-tabs button{flex:1;min-height:44px;border:1px solid var(--tool-line);border-radius:8px;background:#fff;font-weight:700;color:var(--tool-ink);cursor:pointer}
.source-tabs button.active{color:var(--tool-blue-dark);background:var(--tool-blue-soft);border-color:var(--tool-blue)}
.source-pane[hidden]{display:none}
.inline-fields{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.toggle-row{display:flex;align-items:center;gap:9px;min-height:44px;font-size:.84rem}
.toggle-row input{width:20px;height:20px;accent-color:var(--tool-blue)}
.validation{border-radius:8px;padding:10px 12px;font-size:.8rem;line-height:1.45;background:#eef7f1;color:#1f6f40;border:1px solid #cbe7d5}
.validation.bad{background:#fff0ef;color:#9d302d;border-color:#efc7c5}
.validation.warn{background:#fff8e9;color:#8a570d;border-color:#edd9aa}
.toast{position:fixed;right:20px;bottom:20px;z-index:300;background:var(--tool-navy);color:#fff;border-radius:9px;padding:11px 15px;box-shadow:0 12px 32px -14px rgba(0,0,0,.5);font-size:.84rem;opacity:0;transform:translateY(12px);pointer-events:none;transition:.18s}
.toast.show{opacity:1;transform:none}


.palette{display:grid;grid-template-columns:repeat(7,1fr);gap:7px}
.palette button{min-height:52px;border:1px solid var(--tool-line);border-radius:9px;background:#fff;font-family:"Arial Unicode MS","Segoe UI Symbol",sans-serif;font-size:1.85rem;line-height:1;cursor:pointer;color:#14161b;-webkit-text-stroke:.035em rgba(255,255,255,.85);paint-order:stroke fill;box-shadow:0 1px 2px rgba(23,55,94,.07);transition:border-color .14s,box-shadow .14s,transform .14s,background .14s}
.palette button:hover{border-color:var(--tool-blue);transform:translateY(-1px);box-shadow:0 6px 14px -8px rgba(23,55,94,.45)}
.palette button.white-piece{color:#fff;-webkit-text-stroke:.07em #14161b}
.palette button.active{border-color:var(--tool-blue);background:var(--tool-blue-soft);box-shadow:0 0 0 2px rgba(69,119,190,.4),0 8px 16px -10px rgba(47,90,153,.6);transform:translateY(-1px)}
.move-setup{display:grid;gap:10px}
.setup-palette{grid-template-columns:repeat(7,minmax(38px,1fr))}
.setup-palette + .setup-palette{grid-template-columns:repeat(6,minmax(38px,1fr));margin-top:-4px}
.setup-palette button{min-height:46px;font-size:1.55rem}
.setup-fields{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.setup-fields .field{margin-bottom:0}
.setup-castles{margin-top:5px}
.move-setup .validation{margin-top:2px}
.mobile-editor-palette{display:none}
[data-palette],[data-move-palette]{touch-action:none;-webkit-user-drag:none}
.editor-meta{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.castle-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}
.castle-grid label{min-height:44px;border:1px solid var(--tool-line);border-radius:9px;display:flex;align-items:center;justify-content:center;gap:6px;font-size:.78rem;font-weight:700;color:var(--tool-ink);background:#fff;cursor:pointer;transition:border-color .14s,background .14s,color .14s,box-shadow .14s}
.castle-grid label:hover{border-color:var(--tool-blue)}
.castle-grid label:has(input:checked){background:var(--tool-blue-soft);border-color:var(--tool-blue);color:var(--tool-blue-dark);box-shadow:0 0 0 1px rgba(69,119,190,.3)}
.castle-grid input{width:17px;height:17px;margin:0;accent-color:var(--tool-blue);flex:none}


.engine-meter{display:grid;grid-template-columns:58px 1fr;gap:12px;align-items:stretch}
.eval-pill{min-height:58px;border-radius:8px;background:var(--tool-navy);color:#fff;display:grid;place-items:center;font-weight:800;font-size:.98rem;padding:5px;text-align:center}
.engine-copy{display:flex;flex-direction:column;justify-content:center}
.engine-copy b{font-size:.9rem;color:var(--tool-ink)}
.engine-copy span{font-size:.74rem;color:var(--tool-muted)}
.depth-row{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center}
.depth-row input{accent-color:var(--tool-blue);width:100%}
.depth-value{min-width:56px;text-align:center;background:var(--tool-blue-soft);border-radius:6px;padding:5px;color:var(--tool-blue-dark);font-weight:800;font-size:.78rem}
.engine-lines{display:grid;gap:7px;margin-top:12px}
.engine-line{display:grid;grid-template-columns:48px 1fr;gap:9px;align-items:start;background:#f5f9fc;border:1px solid var(--tool-line);border-radius:8px;padding:9px}
.engine-line .score{font-weight:800;color:var(--tool-blue-dark)}
.engine-line code{white-space:normal;word-break:break-word;font-family:inherit;font-size:.78rem;line-height:1.45;color:#465565}
.engine-thinking{position:relative;overflow:hidden}
.engine-thinking:after{content:"";position:absolute;left:-40%;bottom:0;width:40%;height:3px;background:var(--tool-blue);animation:engineSlide 1.15s infinite ease-in-out}
@keyframes engineSlide{to{left:110%}}
.move-trail{display:flex;gap:6px;flex-wrap:wrap;min-height:32px}
.move-chip{padding:5px 8px;border-radius:6px;background:var(--tool-blue-soft);color:var(--tool-navy);font-weight:700;font-size:.76rem}
.checker-line{padding:9px;border:1px solid var(--tool-line);border-radius:9px;background:#fff;align-items:center}
.checker-line .move-chip.decision{box-shadow:inset 3px 0 0 var(--tool-blue);background:#e6f0fb}
.guess-gate{border:1px solid #c7dced;border-radius:10px;padding:14px;background:#f7fbfd}
.guess-state{font-weight:800;color:var(--tool-navy);margin-bottom:5px}
.reveal-card{padding:16px;background:#f2f8f4}
.ethics-note{font-size:.78rem;line-height:1.5;border-left:3px solid var(--tool-warn);padding:8px 10px;background:#fff9ed;color:#77501a}


.calculator-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(290px,.7fr);gap:24px;align-items:start;padding:22px 0 58px}
.calculator-card{border:1px solid var(--tool-line);border-radius:14px;background:#fff;overflow:hidden}
.calculator-card>header{padding:19px 22px;background:var(--tool-navy);color:#fff}
.calculator-card>header h2{color:#fff;font-size:1.2rem}.calculator-card>header p{color:#d8e7f4;font-size:.8rem;margin-top:4px}
.calculator-body{padding:22px}
.calc-form{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.calc-form .elo-system-field{grid-column:1/-1}
.calc-result{border-radius:12px;background:#f4f9fc;border:1px solid #bfd5e7;padding:20px;margin-top:18px}
.calc-result-top{display:flex;align-items:end;justify-content:space-between;gap:18px}
.calc-result .delta{font-size:2.7rem;font-weight:800;letter-spacing:-.04em;color:var(--tool-blue-dark);line-height:1}
.calc-result-top span,.expected-score span{display:block;font-size:.7rem;color:var(--tool-muted);margin-top:3px}.expected-score{text-align:right}.expected-score b{display:block;font-size:1.45rem;color:var(--tool-navy)}
.expectation-track{height:8px;border-radius:99px;background:#dbe7ef;overflow:hidden;margin:15px 0 13px}.expectation-track span{display:block;height:100%;width:50%;background:var(--tool-blue);border-radius:inherit;transition:width .18s}
.calc-result .delta.negative{color:var(--tool-bad)}
.calc-result .formula{margin-top:11px;font-size:.78rem;color:var(--tool-muted);word-break:break-word}
.field-error{color:var(--tool-bad)!important}
.batch-table-wrap{overflow-x:auto;border:1px solid var(--tool-line);border-radius:10px;margin-top:14px}
.batch-table{width:100%;border-collapse:collapse;min-width:540px;font-size:.82rem}
.batch-table th{background:var(--tool-blue-dark);color:#fff;text-align:left;padding:10px}
.batch-table td{padding:7px 10px;border-top:1px solid var(--tool-line)}
.batch-table input,.batch-table select{min-height:40px;width:100%;border:1px solid var(--tool-line);border-radius:6px;padding:6px}
.batch-table button{width:40px;height:40px;border:1px solid var(--tool-line);border-radius:6px;background:#fff;color:var(--tool-bad);cursor:pointer}
.rating-caveat{border-top:4px solid var(--tool-warn);padding:20px;border-radius:0 0 12px 12px;background:#fffaf0}


.pgn-flow{display:grid;gap:22px;padding:26px 0 58px}
.pgn-load-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:22px;align-items:stretch}
.pgn-load-side{display:grid;gap:14px;align-content:start}
.pgn-load-side .action-row{margin-top:0}
.pgn-load-side .validation{margin-top:0}
.pgn-source-field{display:grid;grid-template-rows:auto 1fr auto;margin-bottom:0}
.pgn-source-field .textarea{min-height:260px;height:100%;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.8rem}
.drop-zone{border:2px dashed #a9c4da;border-radius:12px;padding:26px 20px;text-align:center;background:#f7fbfd;transition:border-color .15s,background .15s;display:grid;gap:8px;justify-items:center;cursor:pointer}
.drop-zone:hover{border-color:var(--tool-blue)}
.drop-zone.drag{border-color:var(--tool-blue);background:var(--tool-blue-soft)}
.drop-zone .dz-title{font-size:.95rem;color:var(--tool-ink)}
.drop-zone .help{margin:0}
.file-name{font-size:.78rem;font-weight:700;color:var(--tool-navy);max-width:100%;overflow-wrap:anywhere}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}
.filter-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px 14px}
.filter-grid .field{margin-bottom:0}
.filter-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;margin-top:16px;padding-top:14px;border-top:1px dashed var(--tool-line)}
.summary-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:0 0 16px}
.summary-card{padding:14px 16px;border:1px solid var(--tool-line);border-radius:10px;background:#f7fbfd}
.summary-card b{display:block;font-size:1.6rem;color:var(--tool-navy);line-height:1.1;font-variant-numeric:tabular-nums}
.summary-card span{display:block;font-size:.72rem;color:var(--tool-muted);margin-top:2px}
.pgn-export-row{margin-top:0;margin-bottom:16px}
.game-list{display:grid;grid-template-columns:1fr 1fr;gap:8px;max-height:520px;overflow:auto;padding-right:3px}
.game-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:center;padding:11px 12px;border:1px solid var(--tool-line);border-radius:8px;background:#fff;min-width:0}
.game-row>div{min-width:0}
.game-row b{display:block;font-size:.84rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.game-row span{display:block;font-size:.72rem;color:var(--tool-muted);margin-top:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.result-chip{font-weight:800;color:var(--tool-blue-dark);background:var(--tool-blue-soft);border-radius:6px;padding:5px 8px;font-size:.75rem}


.faq-list{border-top:1px solid var(--tool-line)}
.faq-list details{border-bottom:1px solid var(--tool-line);background:#fff}
.faq-list summary{list-style:none;cursor:pointer;min-height:58px;padding:16px 44px 16px 2px;position:relative;font-weight:700;color:var(--tool-ink)}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary:after{content:"+";position:absolute;right:8px;top:50%;transform:translateY(-50%);color:var(--tool-blue);font-size:1.25rem}
.faq-list details[open] summary:after{content:"−"}
.faq-list details>div{padding:0 42px 18px 2px;max-width:850px;color:var(--tool-muted);font-size:.93rem}
.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.info-grid article{border:1px solid var(--tool-line);border-radius:12px;padding:20px;background:#fff}
.info-grid h3{font-size:1.02rem;margin-bottom:8px}.info-grid p{font-size:.87rem;color:var(--tool-muted)}

@media(max-width:980px){
  .tool-grid{grid-template-columns:repeat(2,1fr)}
  .tool-shell{grid-template-columns:minmax(320px,1fr) minmax(300px,.82fr)}
  .filter-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .foot-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:780px){
  .tools-hero{padding:38px 0 32px}.hero-board-mark{display:none}
  .privacy-strip .wrap{grid-template-columns:1fr;padding:0 20px}.privacy-point,.privacy-point:first-child{border-left:0;border-right:0;border-top:1px solid var(--tool-line)}.privacy-point:first-child{border-top:0}
  .tool-grid,.workflow,.info-grid{grid-template-columns:1fr}.tool-card.featured{grid-column:auto}
  .tool-shell,.calculator-grid{grid-template-columns:1fr}
  .pgn-load-grid,.game-list{grid-template-columns:1fr}
  .filter-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .board-column{position:static}
  .mobile-editor-palette{display:flex;gap:6px;position:sticky;top:72px;z-index:14;overflow-x:auto;padding:6px;margin:0 0 8px;background:rgba(247,251,253,.96);border:1px solid var(--tool-line);border-radius:10px;box-shadow:0 7px 20px -16px rgba(23,55,94,.8);scrollbar-width:none}
  .mobile-editor-palette::-webkit-scrollbar{display:none}
  .mobile-editor-palette button{flex:0 0 46px;width:46px;height:46px;border:1px solid var(--tool-line);border-radius:9px;background:#fff;font-family:"Arial Unicode MS","Segoe UI Symbol",sans-serif;font-size:1.6rem;line-height:1;color:#14161b;-webkit-text-stroke:.035em rgba(255,255,255,.85);paint-order:stroke fill;cursor:pointer}
  .mobile-editor-palette button.white-piece{color:#fff;-webkit-text-stroke:.07em #14161b}
  .mobile-editor-palette button.active{border-color:var(--tool-blue);background:var(--tool-blue-soft);box-shadow:0 0 0 2px rgba(69,119,190,.4)}
  .inspector{overflow:visible}
  .inspector-head{position:sticky;top:72px;z-index:12}
  .board-frame{padding:8px;border-radius:11px}
  .tools-section{padding:46px 0}
  .section-head{display:block}.section-head p{margin-top:8px}
  .foot-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:520px){
  .wrap{padding-left:12px;padding-right:12px}
  .privacy-strip .wrap{grid-template-columns:repeat(3,1fr);padding:0 6px}
  .privacy-point,.privacy-point:first-child{min-height:72px;border-top:0;border-left:0;border-right:1px solid var(--tool-line);padding:8px 5px;gap:5px;display:grid;grid-template-columns:26px 1fr}
  .privacy-point:last-child{border-right:0}
  .privacy-icon{width:26px;height:26px;flex-basis:26px;font-size:.75rem}
  .privacy-point b{font-size:.69rem;line-height:1.2}
  .privacy-point div>span{display:none}
  .tools-hero{padding:22px 0 26px}.tools-hero .tools-crumbs{margin-bottom:10px}.tools-hero .tools-eyebrow{margin-bottom:6px}
  .tools-hero h1,.tool-intro h1{letter-spacing:-.03em}.tools-hero h1{font-size:2rem;line-height:1.05;margin-bottom:10px}
  .tools-hero .lead,.tool-intro .lead{font-size:.94rem;line-height:1.45}
  .tools-section{padding:38px 0}
  .tool-intro{padding:25px 0 12px}
  .tool-shell{padding-top:8px;gap:14px}
  .tool-shell.wrap{padding-left:4px;padding-right:4px}
  .board-frame,
  body[data-tool-page="analysis"] .board-frame,
  body[data-tool-page="next-move"] .board-frame{padding:5px!important}
  .board-toolbar{margin-bottom:7px}
  .coord{font-size:.55rem}
  .panel{padding:16px 14px}
  .inspector-head{padding:14px;top:72px}
  .mobile-editor-palette{top:72px}
  body[data-tool-page="editor"] .board-status{display:none}
  .segmented{grid-template-columns:1fr 1fr}
  .inline-fields,.editor-meta,.calc-form,.filter-grid,.setup-fields{grid-template-columns:1fr}
  .palette{grid-template-columns:repeat(7,1fr);gap:3px}.palette button{min-height:44px;font-size:1.35rem;padding:0}
  .castle-grid{grid-template-columns:1fr 1fr}
  .action-row{display:grid;grid-template-columns:1fr 1fr}.action-row .wide{grid-column:1/-1}
  .btn,.link-btn{padding-left:10px;padding-right:10px;font-size:.86rem}
  .summary-cards{grid-template-columns:1fr 1fr}.summary-card:last-child{grid-column:1/-1}
  .calculator-body{padding:15px}.calculator-card>header{padding:16px}
  .foot-grid{grid-template-columns:1fr}
}
@media(max-width:350px){
  .wrap{padding-left:8px;padding-right:8px}
  .board-frame{padding:5px}
  .palette button{font-size:1.4rem;min-height:46px}
  .action-row{grid-template-columns:1fr}.action-row .wide{grid-column:auto}
  .summary-cards{grid-template-columns:1fr}.summary-card:last-child{grid-column:auto}
}


.tool-mobile-dock{display:none}
@media(max-width:780px) and (min-height:521px){
  body.has-tool-mobile-dock{padding-bottom:calc(78px + env(safe-area-inset-bottom))}
  .tool-mobile-dock{position:fixed;left:max(8px,env(safe-area-inset-left));right:max(8px,env(safe-area-inset-right));bottom:max(8px,env(safe-area-inset-bottom));z-index:45;display:grid;grid-template-columns:minmax(72px,.72fr) minmax(82px,.86fr) minmax(116px,1.35fr);gap:6px;padding:6px;border:1px solid #c7daea;border-radius:13px;background:rgba(255,255,255,.97);box-shadow:0 12px 34px rgba(23,55,94,.22);backdrop-filter:blur(10px)}
  .tool-mobile-dock button{min-width:0;min-height:48px;border:1px solid var(--tool-line);border-radius:9px;padding:7px 8px;background:#fff;color:var(--tool-navy);font:inherit;font-size:.76rem;font-weight:800;line-height:1.1;cursor:pointer}
  .tool-mobile-dock button[aria-current="true"]{background:var(--tool-blue-soft);border-color:var(--tool-blue)}
  .tool-mobile-dock .tool-dock-action{background:var(--tool-blue);border-color:var(--tool-blue);color:#fff}
  .tool-mobile-dock .tool-dock-action:disabled{opacity:.58;cursor:not-allowed}
  .board-column,.board-frame,.inspector{scroll-margin-top:76px;scroll-margin-bottom:calc(82px + env(safe-area-inset-bottom))}
}


@media(max-height:520px) and (min-width:521px) and (max-width:960px){
  body.tools-page .site-header{position:relative}
  body.tools-page .tool-intro{padding:8px 0 6px}
  body.tools-page .tool-intro .tools-crumbs,
  body.tools-page .tool-intro .lead{display:none}
  body.tools-page .tool-intro h1{font-size:1.22rem;line-height:1.2;margin:0}
  body.tools-page .tool-shell,
  body.tools-page[data-tool-page="analysis"] .tool-shell,
  body.tools-page[data-tool-page="next-move"] .tool-shell{grid-template-columns:minmax(250px,40vw) minmax(0,1fr);gap:12px;padding:7px 8px 24px}
  body.tools-page .board-column,
  body.tools-page[data-tool-page="analysis"] .board-column,
  body.tools-page[data-tool-page="next-move"] .board-column{position:sticky;top:6px}
  body.tools-page .board-frame,
  body.tools-page[data-tool-page="analysis"] .board-frame,
  body.tools-page[data-tool-page="next-move"] .board-frame{padding:4px!important;border-radius:9px}
  body.tools-page .board-toolbar{min-height:34px;margin-bottom:3px}
  body.tools-page .board-toolbar .btn.icon{width:34px;min-height:34px;height:34px}
  body.tools-page .cd-board{width:min(100%,calc(100vh - 102px));margin-inline:auto}
  body.tools-page .board-status{padding-top:3px;font-size:.65rem;line-height:1.2}
  body.tools-page .tool-mobile-dock{display:none!important}
  body.tools-page.has-tool-mobile-dock{padding-bottom:0}
}
.promotion-picker-backdrop{position:fixed;inset:0;z-index:10050;display:grid;place-items:center;padding:18px;background:rgba(14,31,50,.62)}
.promotion-picker{width:min(430px,100%);background:#fff;border:1px solid var(--tool-line);border-radius:16px;padding:22px;box-shadow:0 24px 70px rgba(14,31,50,.28);text-align:center}
.promotion-picker h2{margin:0;color:var(--tool-ink);font-size:1.25rem}.promotion-picker p{margin:6px 0 16px;color:var(--tool-muted);font-size:.9rem}
.promotion-options{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.promotion-option,.promotion-cancel{min-height:48px;border:1px solid var(--tool-line);border-radius:10px;background:#fff;color:var(--tool-ink);font:inherit;font-weight:700;cursor:pointer}
.promotion-option{display:grid;place-items:center;gap:3px;padding:8px 4px}.promotion-option .cd-piece{font-size:2.1rem;line-height:1}.promotion-option>span:last-child{font-size:.72rem}
.promotion-option:hover,.promotion-option:focus-visible{border-color:var(--tool-blue);background:var(--tool-blue-soft);outline:3px solid rgba(69,119,190,.22);outline-offset:1px}
.promotion-cancel{width:100%;margin-top:12px;background:var(--tool-sky)}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}


.cd-tools-nav{border-top:1px solid var(--tool-line);background:var(--tool-sky)}
.cd-tn-all{font-weight:700;white-space:nowrap}
.cd-tn-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}
.cd-tn-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--tool-line);border-radius:13px;padding:15px 17px;box-shadow:0 9px 24px -22px rgba(23,55,94,.55);color:inherit;transition:transform .15s,border-color .15s,box-shadow .15s;min-width:0}
.cd-tn-card:hover{transform:translateY(-2px);border-color:var(--tool-blue);box-shadow:0 16px 30px -22px rgba(23,55,94,.7);text-decoration:none}
.cd-tn-card:focus-visible{outline:3px solid rgba(69,119,190,.38);outline-offset:3px;border-color:var(--tool-blue);text-decoration:none}
.cd-tn-k{display:block;font-size:.66rem;font-weight:800;letter-spacing:.07em;text-transform:uppercase;color:var(--tool-blue-dark);margin-bottom:7px}
.cd-tn-title{display:block;color:var(--tool-ink);font-size:1.04rem;line-height:1.3;font-weight:700;margin:0 0 5px}
.cd-tn-title:after{content:" →";color:var(--tool-blue);font-weight:800}
.cd-tn-card:hover .cd-tn-title{color:var(--tool-blue-dark)}
.cd-tn-d{display:block;font-size:.84rem;line-height:1.5;color:var(--tool-muted)}
.cd-tn-card.is-current{background:var(--tool-blue-soft);border-color:var(--tool-blue);cursor:default;box-shadow:none}
.cd-tn-card.is-current:hover{transform:none}
.cd-tn-card.is-current .cd-tn-title:after{content:""}
.cd-tn-card.is-current .cd-tn-k{color:var(--tool-good)}
.tool-card-visual{display:flex;flex-direction:column;align-items:center;gap:9px;width:100%;min-width:0;margin-bottom:14px;padding:10px;border:1px solid #d6e4ef;border-radius:11px;background:linear-gradient(145deg,#f8fbff 0%,#edf5fa 100%);contain:layout paint;overflow:hidden}
.tool-card-scene-wrap{display:block;width:min(168px,100%);aspect-ratio:112/96;flex:0 0 auto;border-radius:8px;overflow:hidden;background:#fff;box-shadow:0 8px 18px -13px rgba(30,63,103,.7)}
.tool-card-scene{display:block;width:100%;height:100%}
.tool-card-visual-copy{display:flex;flex-direction:column;align-items:center;gap:3px;min-width:0;line-height:1.25;text-align:center}
.tool-card-visual-copy>span{color:var(--tool-blue-dark);font-size:.61rem;font-weight:800;letter-spacing:.055em;text-transform:uppercase}
.tool-card-visual-copy>strong{color:var(--tool-ink);font-size:.75rem;font-weight:700}
@media(max-width:959px) and (min-width:621px){
  .cd-tn-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:620px){
  .cd-tn-grid{grid-template-columns:minmax(0,1fr)}
  .tool-card-visual{display:grid;grid-template-columns:minmax(128px,144px) minmax(0,1fr);align-items:center;gap:10px;padding:8px}
  .tool-card-scene-wrap{width:100%}
  .tool-card-visual-copy{align-items:flex-start;text-align:left}
  .tool-card-visual-copy>span{font-size:.65rem}
  .tool-card-visual-copy>strong{font-size:.82rem}
}


body.tools-page .tool-intro,body.tools-page[data-tool-page="hub"] .tools-hero{padding:18px 0 14px}
body.tools-page .tool-intro>.wrap,body.tools-page[data-tool-page="hub"] .tools-hero>.wrap{display:block;text-align:left}
body.tools-page .tool-intro .tools-crumbs,body.tools-page[data-tool-page="hub"] .tools-hero .crumbs{justify-content:flex-start;
  margin:0 0 8px;font-size:.78rem}
body.tools-page .tool-intro h1,body.tools-page[data-tool-page="hub"] .tools-hero h1{max-width:none;margin:0 0 6px;
  font-size:clamp(1.55rem,2.1vw,2.15rem);line-height:1.1;letter-spacing:-.025em}
body.tools-page .tool-intro .lead,body.tools-page[data-tool-page="hub"] .tools-hero .lead{max-width:72ch;margin:0;
  font-size:.93rem;line-height:1.5;color:var(--tool-muted)}
body.tools-page .tool-shell{padding-top:16px}
body.tools-page .inspector-head{position:static;padding:14px 18px 10px;background:#fff;color:var(--tool-ink);
  border-bottom:1px solid var(--tool-line)}
body.tools-page .inspector-head h2{color:var(--tool-ink);font-size:1rem;letter-spacing:-.01em}
body.tools-page .inspector-head :is(p,span){margin:0;font-size:.78rem;font-weight:600;letter-spacing:0;text-transform:none;
  color:var(--tool-muted)}
body.tools-page .step{display:none}
body.tools-page .help{font-size:.78rem;line-height:1.45;color:var(--tool-muted)}
body.tools-page :is(.panel,.calculator-card) :is(h2,h3){font-size:.95rem;letter-spacing:-.005em}
body.tools-page :is(.eyebrow,.kicker,.label-hint){letter-spacing:.01em;text-transform:none}
body.tools-page .calculator-card>header{padding:14px 18px 10px;background:#fff;color:var(--tool-ink);
  border-bottom:1px solid var(--tool-line)}
body.tools-page .calculator-card>header h2{color:var(--tool-ink);font-size:1rem}
body.tools-page .calculator-card>header p{color:var(--tool-muted);font-size:.78rem}
body.tools-page .tool-number{font-size:.78rem;letter-spacing:0;text-transform:none;font-weight:700}
body.tools-page[data-tool-page="hub"] #all-tools{padding-top:22px}
body.tools-page[data-tool-page="hub"] #all-tools .section-head{margin-bottom:16px;padding-bottom:10px;border-bottom-width:1px}
body.tools-page[data-tool-page="hub"] #all-tools .section-head h2{font-size:1.25rem}
body.tools-page[data-tool-page="hub"] #all-tools .section-head>p{display:none}
body.tools-page[data-tool-page="hub"] .tool-card-top{margin-bottom:16px}
body.tools-page[data-tool-page="hub"] .tool-grid{align-items:start}

@media (min-width:980px){
  body.tools-page .tool-shell{grid-template-columns:minmax(380px,min(650px,calc(100vh - 285px))) minmax(320px,1fr)}
  body.tools-page .cd-board{width:100%;max-width:none}
}