.co-page{min-width:0}
.co-page [hidden]{display:none!important}
.co-page button,.co-page input,.co-page select{font:inherit;color:inherit}
.co-hero{text-align:center;padding:38px 0 46px}
.co-hero .crumbs{display:flex;justify-content:center}
.co-hero h1{font-size:clamp(2.1rem,4.8vw,3.35rem);letter-spacing:-.035em;margin:13px auto 12px}
.co-hero .lede{max-width:78ch;margin:0 auto;font-size:1.05rem;line-height:1.65}
.co-hero-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:20px}
.co-facts{display:flex;justify-content:center;flex-wrap:wrap;gap:7px 22px;margin-top:15px;font-size:.84rem;color:var(--ink)}
.co-facts span::before{content:"✓";font-weight:800;color:var(--green);margin-right:6px}

.co-player{max-width:960px;margin:30px auto 0;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow-md);padding:15px;text-align:left;min-width:0}
.co-popular{display:flex;gap:7px;overflow-x:auto;padding:1px 1px 11px;scrollbar-width:none;scroll-snap-type:x proximity}
.co-popular::-webkit-scrollbar{display:none}
.co-popular button{flex:none;min-height:44px;border:1px solid var(--line);border-radius:999px;background:#fff;padding:8px 12px;font-size:.75rem;font-weight:700;cursor:pointer;scroll-snap-align:start}
.co-popular button:hover,.co-popular button[aria-pressed="true"]{border-color:var(--blue);background:var(--mist);color:var(--blue-deep)}
.co-player-main{display:grid;grid-template-columns:minmax(280px,1fr) minmax(0,.95fr);gap:18px;align-items:center;min-width:0}
.co-board-wrap{min-width:0}
.co-board{width:100%;max-width:430px;aspect-ratio:1;display:grid;grid-template-columns:repeat(8,minmax(0,1fr));grid-template-rows:repeat(8,minmax(0,1fr));overflow:hidden;border:1px solid #cfdeea;border-radius:11px;margin:0 auto;box-shadow:0 18px 36px -26px rgba(31,61,100,.72);container-type:inline-size}
.co-square{display:grid;place-items:center;min-width:0;min-height:0;background:#fff;position:relative}
.co-square.dark{background:var(--blue)}
.co-square.last{box-shadow:inset 0 0 0 999px rgba(246,196,83,.46)}
.co-piece{font-family:"Arial Unicode MS","Segoe UI Symbol",sans-serif;font-size:clamp(1.75rem,9vw,2.8rem);font-size:10.4cqw;line-height:1;transform:translateY(-1%);user-select:none}
.co-piece.white{color:#fff;-webkit-text-stroke:.065em #14161b;paint-order:stroke fill}
.co-piece.black{color:#14161b;-webkit-text-stroke:.024em rgba(255,255,255,.82);paint-order:stroke fill}
.co-player-info{min-width:0;padding:6px 7px}
.co-player-info .kicker{display:block;font-size:.67rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--blue-deep)}
.co-player-info h2{font-size:clamp(1.45rem,3vw,2rem);margin:4px 0 7px;letter-spacing:-.02em}
.co-line-label{font-size:.78rem;color:var(--ink-soft);margin-bottom:8px}
.co-line{display:flex;flex-wrap:wrap;gap:5px;min-height:74px;align-content:flex-start}
.co-line span{display:inline-flex;align-items:center;min-height:29px;border-radius:6px;background:var(--mist);border:1px solid var(--line);padding:3px 7px;font-size:.73rem;font-weight:700;color:var(--ink)}
.co-line span.on{background:var(--blue);border-color:var(--blue);color:#fff}
.co-player-state{min-height:24px;margin:11px 0 8px;font-size:.8rem;font-weight:700;color:var(--blue-deep)}
.co-controls{display:grid;grid-template-columns:auto minmax(0,1fr) auto auto;gap:7px}
.co-controls button{min-height:44px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:8px 11px;font-size:.76rem;font-weight:800;cursor:pointer}
.co-controls button:hover{border-color:var(--blue);background:var(--mist);color:var(--blue-deep)}
.co-controls .co-play{background:var(--blue);border-color:var(--blue);color:#fff}
.co-controls .co-play:hover{background:var(--blue-deep);color:#fff}

.co-catalog{min-width:0;scroll-margin-top:82px}
.co-filter-panel{width:min(100%,1060px);margin:0 auto 16px}
.co-searchbar{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;align-items:center;margin-bottom:10px}
.co-searchbar label{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.co-searchbar input{width:100%;min-height:44px;border:1px solid #c9d9e7;border-radius:10px;background:#fff;padding:8px 12px}
.co-searchbar output{font-size:.8rem;font-weight:800;color:var(--blue-deep);white-space:nowrap}
.co-filterbox{border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:var(--shadow-sm);padding:3px 12px;margin-bottom:4px}
.co-filter-row{display:grid;grid-template-columns:128px minmax(0,1fr);gap:10px;align-items:center;padding:6px 0;border-bottom:1px solid var(--line);min-width:0}
.co-filter-row:last-child{border-bottom:0}
.co-filter-row>span{font-size:.74rem;font-weight:800;color:var(--ink)}
.co-filter-options{display:flex;gap:6px;flex-wrap:wrap;min-width:0}
.co-filter-options button{min-height:36px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:5px 9px;font-size:.72rem;font-weight:700;cursor:pointer}
.co-filter-options button:hover,.co-filter-options button[aria-pressed="true"]{border-color:var(--blue);background:var(--mist);color:var(--blue-deep)}
.co-clear{border:0;background:transparent;color:var(--blue);font-weight:800;cursor:pointer;min-height:36px;padding:4px 0}

.co-ledger{display:grid;grid-template-columns:minmax(0,1.42fr) minmax(280px,.58fr);gap:18px;align-items:start;min-width:0}
.co-table-wrap{border:1px solid var(--line);border-radius:14px;overflow:auto;background:#fff;min-width:0;box-shadow:var(--shadow-sm)}
.co-table{width:100%;border-collapse:collapse;min-width:760px;font-size:.78rem}
.co-table th,.co-table td{text-align:left;padding:10px 9px;border-bottom:1px solid var(--line);vertical-align:middle}
.co-table th{position:sticky;top:0;background:var(--mist);z-index:2;font-size:.64rem;text-transform:uppercase;letter-spacing:.055em;color:var(--blue-deep);white-space:nowrap}
.co-table tbody tr{cursor:pointer}
.co-table tbody tr:hover,.co-table tbody tr:focus,.co-table tbody tr[aria-selected="true"]{background:#f4f8fe;outline:none}
.co-table tbody tr[aria-selected="true"]{box-shadow:inset 3px 0 0 var(--blue)}
.co-table tbody tr:last-child td{border-bottom:0}
.co-table td:first-child{font-weight:800;color:var(--ink);min-width:170px}
.co-table .co-empty{padding:28px 18px;text-align:center;color:var(--ink-soft);cursor:default}

.co-pinned{position:sticky;top:88px;border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:var(--shadow-sm);padding:14px;min-width:0}
.co-pin-board{width:100%;max-width:330px;aspect-ratio:1;display:grid;grid-template-columns:repeat(8,minmax(0,1fr));grid-template-rows:repeat(8,minmax(0,1fr));overflow:hidden;border-radius:9px;border:1px solid var(--line);margin:0 auto 12px;container-type:inline-size}
.co-pin-board .co-piece{font-size:clamp(1.4rem,7vw,2.2rem);font-size:10.4cqw}
.co-pinned h3{font-size:1.17rem;margin-bottom:4px}
.co-pin-moves{font-size:.75rem;line-height:1.5;color:var(--ink-soft)}
.co-pin-meta{display:flex;gap:5px;flex-wrap:wrap;margin:9px 0}
.co-pin-meta span{border:1px solid var(--line);border-radius:5px;background:var(--mist);padding:3px 7px;font-size:.65rem;font-weight:700;color:var(--ink)}
.co-pinned h4{font-size:.74rem;text-transform:uppercase;letter-spacing:.06em;color:var(--blue-deep);margin:10px 0 5px}
.co-pin-vars{list-style:none;display:grid;gap:5px;padding:0;margin:0}
.co-pin-vars li{font-size:.71rem;line-height:1.4;border-left:2px solid var(--line);padding-left:7px;color:var(--ink-soft)}
.co-pinned .btn{width:100%;justify-content:center;margin-top:12px;min-height:46px}

.co-repertoire-builder{border:1px solid var(--line);border-radius:15px;background:#fff;box-shadow:var(--shadow-sm);padding:16px;min-width:0}
.co-repertoire-fields{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:11px}
.co-repertoire-fields label{display:grid;gap:6px;min-width:0}
.co-repertoire-fields label>span{font-size:.71rem;font-weight:800;color:var(--ink)}
.co-repertoire-fields select{width:100%;min-width:0;min-height:46px;border:1px solid #c9d9e7;border-radius:9px;background:#fff;padding:8px 34px 8px 10px;font-size:.8rem;font-weight:700}
.co-repertoire-fields select:focus-visible,.co-depth-options button:focus-visible{outline:3px solid rgba(69,119,190,.3);outline-offset:2px}
.co-repertoire-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:11px;margin-top:13px}
.co-repertoire-summary article{display:flex;flex-direction:column;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:9px;background:var(--mist);padding:10px 11px;min-width:0}
.co-repertoire-summary article>span{font-size:.61rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--blue-deep)}
.co-repertoire-summary a{font-size:.9rem;font-weight:800;color:var(--ink);line-height:1.3;margin:4px 0}
.co-repertoire-summary small{font-size:.7rem;line-height:1.4;color:var(--ink-soft)}
.co-repertoire-note{font-size:.77rem;line-height:1.5;margin:12px 0 0;color:var(--ink-soft)}

.co-depth-tool{display:grid;grid-template-columns:minmax(190px,.38fr) minmax(0,1fr);gap:14px;align-items:stretch}
.co-depth-options{display:grid;gap:7px}
.co-depth-options button{width:100%;min-height:46px;border:1px solid var(--line);border-radius:9px;background:#fff;padding:8px 11px;text-align:left;font:inherit;font-size:.78rem;font-weight:800;color:var(--ink);cursor:pointer}
.co-depth-options button:hover,.co-depth-options button[aria-pressed="true"]{border-color:var(--blue);background:var(--mist);color:var(--blue-deep)}
.co-depth-result{border:1px solid var(--line);border-top:4px solid var(--blue);border-radius:0 0 13px 13px;background:#fff;box-shadow:var(--shadow-sm);padding:16px;min-width:0}
.co-depth-range{display:block;font-size:.65rem;font-weight:800;letter-spacing:.07em;text-transform:uppercase;color:var(--blue-deep)}
.co-depth-result h3{font-size:1.18rem;margin:4px 0 6px}
.co-depth-copy{font-size:.84rem;line-height:1.55;max-width:76ch}
.co-depth-list{display:grid;gap:5px;margin:11px 0 12px;padding-left:20px;font-size:.8rem;line-height:1.45}
.co-depth-link{display:inline-flex;align-items:center;min-height:44px;font-size:.8rem;font-weight:800}

.co-methods{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.co-method{border:1px solid var(--line);border-top:4px solid var(--blue);border-radius:0 0 13px 13px;background:#fff;padding:17px;box-shadow:var(--shadow-sm);min-width:0}
.co-method .n{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--mist);color:var(--blue-deep);font-size:.76rem;font-weight:800;margin-bottom:8px}
.co-method h3{font-size:1.08rem;margin-bottom:6px}
.co-method p{font-size:.84rem;line-height:1.55}
.co-links{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:13px}
.co-link{display:flex;flex-direction:column;gap:5px;border:1px solid var(--line);border-radius:13px;background:#fff;padding:14px 15px;color:var(--ink);min-width:0;box-shadow:var(--shadow-sm)}
.co-link:hover{text-decoration:none;border-color:#c3d8ec;box-shadow:var(--shadow-md);transform:translateY(-2px)}
.co-link.is-current{background:var(--mist);border-color:var(--blue);box-shadow:none}
.co-link.is-current:hover{transform:none}
.co-link>b{display:block;color:var(--ink);font-size:.92rem;line-height:1.25}
.co-link .co-link-d{font-size:.78rem;line-height:1.4;color:var(--ink-soft)}
.co-page .hb-sec:last-of-type{padding-bottom:56px}

@media(max-width:980px){
  .co-ledger{grid-template-columns:minmax(0,1fr)}
  .co-pinned{position:static;display:grid;grid-template-columns:220px minmax(0,1fr);gap:15px;align-items:start}
  .co-pin-board{margin:0}
  .co-links{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:820px){
  .co-hero{padding:28px 0 38px}
  .co-player-main{grid-template-columns:minmax(0,1fr)}
  .co-controls{grid-template-columns:repeat(2,minmax(0,1fr))}
  .co-filter-row{grid-template-columns:112px minmax(0,1fr);gap:8px;padding:6px 0;align-items:start}
  .co-filter-options{flex-wrap:nowrap;overflow-x:auto;padding-bottom:2px;scrollbar-width:none}
  .co-filter-options::-webkit-scrollbar{display:none}
  .co-filter-options button{flex:none;min-height:44px}
  .co-clear{min-height:44px}
  .co-methods{grid-template-columns:minmax(0,1fr)}
  .co-repertoire-fields,.co-repertoire-summary{grid-template-columns:minmax(0,1fr)}
  .co-depth-tool{grid-template-columns:minmax(0,1fr)}
  .co-depth-options{grid-template-columns:repeat(2,minmax(0,1fr))}
  .co-table{min-width:0;display:block}
  .co-table thead{display:none}
  .co-table tbody{display:grid}
  .co-table tbody tr{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));padding:11px 12px 12px;border-bottom:1px solid var(--line);gap:7px 10px;min-width:0}
  .co-table tbody td{display:block;padding:0;border:0;min-width:0;overflow-wrap:anywhere;line-height:1.25}
  .co-table tbody td::before{content:attr(data-label);display:block;font-size:.58rem;line-height:1.2;text-transform:uppercase;letter-spacing:.05em;font-weight:800;color:var(--blue-deep);margin-bottom:2px}
  .co-table tbody td:first-child{grid-column:1/-1;display:block;font-size:.96rem;min-width:0;margin-bottom:1px}
  .co-table tbody td:first-child::before{content:none}
  .co-row-link{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--ink);font-weight:800}
  .co-row-link::after{content:"Open →";font-size:.65rem;color:var(--blue);white-space:nowrap}
  .co-pinned{order:-1}
  .co-pinned{grid-template-columns:minmax(0,1fr)}
  .co-pin-board{width:min(100%,330px);margin:0 auto}
}
@media(max-width:620px){.co-links{grid-template-columns:minmax(0,1fr)}}
@media(max-width:520px){
  .co-searchbar{grid-template-columns:minmax(0,1fr)}
  .co-searchbar output{white-space:normal}
  .co-player{width:calc(100% + 40px);margin-left:-20px;margin-right:-20px;padding:8px;border-radius:14px}
  .co-board{max-width:none}
  .co-player-info{padding:7px 4px}
  .co-pinned{margin-left:-8px;margin-right:-8px;padding:8px}
  .co-repertoire-builder{margin-left:-8px;margin-right:-8px;padding:10px}
  .co-depth-options{grid-template-columns:minmax(0,1fr)}
  .co-facts{display:grid;width:max-content;max-width:100%;margin-left:auto;margin-right:auto;text-align:left}
  .co-filterbox{padding-left:9px;padding-right:9px}
  .co-filter-row{grid-template-columns:96px minmax(0,1fr);gap:7px}
}
@media(prefers-reduced-motion:reduce){.co-link{transition:none}.co-link:hover{transform:none}}


@media(min-width:781px){
  .co-hero{text-align:left;padding:18px 0 24px}
  .co-hero .crumbs{justify-content:flex-start}
  .co-hero h1{margin:6px 0;font-size:clamp(1.55rem,2.2vw,2.2rem);line-height:1.12;letter-spacing:-.025em}
  .co-hero .lede{max-width:80ch;margin:0;font-size:.95rem;line-height:1.55}
  .co-hero-actions{justify-content:flex-start;margin-top:12px}
  .co-facts{display:none}
  .co-player{max-width:none;margin:18px 0 0}
}