.roca-app{--roca-bg:#f5f7fb;--roca-card:#fff;--roca-text:#172033;--roca-muted:#657187;--roca-border:#dfe5ee;--roca-square-light:#f0d9b5;--roca-square-dark:#b58863;color:var(--roca-text);background:var(--roca-bg);font:16px/1.5 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;border-radius:20px;padding:clamp(12px,2.4vw,26px);width:100%;box-sizing:border-box;min-height:80vh}.roca-app *{box-sizing:border-box}.roca-app[data-theme=dark]{--roca-bg:#111827;--roca-card:#1d2738;--roca-text:#f1f5f9;--roca-muted:#b5c0d1;--roca-border:#36445a;--roca-square-light:#d8c8a8;--roca-square-dark:#79583f}.roca-header{display:flex;align-items:center;gap:14px;margin-bottom:20px}.roca-mark{display:grid;place-items:center;width:52px;height:52px;border-radius:16px;background:linear-gradient(135deg,var(--roca-accent),var(--roca-accent2));color:#fff;font-size:32px;flex:none}.roca-header h2{font-size:clamp(22px,3vw,30px);margin:0;color:var(--roca-text)}.roca-header p{margin:2px 0 0;color:var(--roca-muted)}.roca-theme{margin-left:auto;white-space:nowrap}.roca-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.roca-app button,.roca-app select,.roca-app input{font:inherit}.roca-app button{border:1px solid var(--roca-border);background:var(--roca-card);color:var(--roca-text);border-radius:10px;padding:9px 13px;cursor:pointer;transition:background .15s,border-color .15s,color .15s}.roca-app button:hover{border-color:var(--roca-accent);background:var(--roca-accent);color:#fff}.roca-app button:focus-visible,.roca-app input:focus-visible,.roca-app select:focus-visible{outline:3px solid color-mix(in srgb,var(--roca-accent) 40%,transparent);outline-offset:2px}.roca-tabs button.active,.roca-lesson-card.active{background:var(--roca-accent);border-color:var(--roca-accent);color:#fff}.roca-main{display:grid;grid-template-columns:minmax(220px,.85fr) minmax(300px,1.15fr);gap:16px;align-items:start}.roca-panel{min-width:0;background:var(--roca-card);border:1px solid var(--roca-border);border-radius:16px;padding:16px;box-shadow:0 4px 18px #0b163008}.roca-panel[hidden],.roca-promotion[hidden]{display:none!important}.roca-panel h3{font-size:19px;margin:0 0 8px;color:var(--roca-text)}.roca-muted{color:var(--roca-muted);font-size:14px;margin:5px 0 14px}.roca-small{font-size:12px}.roca-lesson-list{display:grid;gap:8px;margin:14px 0}.roca-lesson-card{display:flex;flex-direction:column;text-align:left;gap:3px;width:100%;padding:11px 12px!important}.roca-lesson-card strong{font-size:14px}.roca-lesson-card small{font-size:12px;opacity:.8}.roca-level{font-size:10px;text-transform:uppercase;letter-spacing:.07em;opacity:.8}.roca-lesson-info{border-top:1px solid var(--roca-border);padding-top:14px;margin-top:14px}.roca-lesson-desc{font-size:14px;color:var(--roca-muted)}.roca-progress{height:7px;border-radius:20px;background:var(--roca-border);overflow:hidden;margin:14px 0}.roca-progress span{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--roca-accent),var(--roca-accent2));transition:width .2s}.roca-lesson-actions{display:flex;flex-wrap:wrap;gap:7px}.roca-lesson-actions button{font-size:13px;padding:8px 10px}.roca-board-panel{grid-row:span 2}.roca-status{font-weight:700;margin:0 0 12px;min-height:24px}.roca-board-wrap{width:100%;max-width:620px;margin:0 auto}.roca-board{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));aspect-ratio:1;border:3px solid var(--roca-border);border-radius:4px;overflow:hidden;touch-action:manipulation}.roca-square{position:relative;display:grid;place-items:center;border:0!important;border-radius:0!important;padding:0!important;min-width:0;aspect-ratio:1;line-height:1}.roca-square.light{background:var(--roca-square-light)!important;color:#1d2430!important}.roca-square.dark{background:var(--roca-square-dark)!important;color:#fff!important}.roca-square:hover{filter:brightness(1.08);background-color:inherit!important;color:inherit!important}.roca-square.selected{box-shadow:inset 0 0 0 5px #facc15}.roca-square.last-move{background-image:linear-gradient(#facc1555,#facc1555)}.roca-piece{font-family:"Segoe UI Symbol","DejaVu Sans",serif;font-size:clamp(23px,5vw,54px);display:block;line-height:1;filter:drop-shadow(0 1px 1px #0004);pointer-events:none}.white-piece{color:#fffdf4;text-shadow:1px 1px 1px #171717,-.7px -.7px #171717}.black-piece{color:#171717;text-shadow:0 0 1px #fff}.roca-square.move-target:after{content:"";position:absolute;width:22%;height:22%;border-radius:50%;background:#176b37a8;pointer-events:none}.roca-square.capture-target:after{content:"";position:absolute;inset:4%;border:4px solid #176b37a8;border-radius:50%;pointer-events:none}.rank-label,.file-label{position:absolute;font-size:clamp(8px,1.1vw,12px);font-weight:700;line-height:1;opacity:.85}.rank-label{left:3px;top:3px}.file-label{right:3px;bottom:3px}.roca-controls{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.roca-controls button{flex:1}.roca-moves{border-top:1px solid var(--roca-border);padding-top:10px}.roca-moves ol{max-height:120px;overflow:auto;display:grid;grid-template-columns:1fr 1fr;gap:2px 18px;padding-left:24px;color:var(--roca-muted);font-size:13px}.roca-feedback{min-height:24px;margin-top:8px;color:var(--roca-accent);font-size:14px;font-weight:600}.roca-promotion{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin:10px 0}.roca-computer-panel label,.roca-online-panel label{display:flex;flex-direction:column;gap:5px;margin:12px 0;color:var(--roca-text);font-size:14px}.roca-app input,.roca-app select{background:var(--roca-bg);color:var(--roca-text);border:1px solid var(--roca-border);border-radius:9px;padding:10px;max-width:100%;width:100%}.roca-online-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;align-items:end}.roca-online-actions label{margin:0}.roca-room-info{overflow-wrap:anywhere;font-size:14px}.roca-room-info a{color:var(--roca-accent);display:inline-block;margin-right:8px}.roca-room-info button{margin:6px 0}.roca-credit{text-align:center;color:var(--roca-muted);font-size:12px;margin-top:20px}.roca-credit a{color:var(--roca-accent);text-decoration:none}.roca-credit a:hover{text-decoration:underline}@media(max-width:800px){.roca-main{grid-template-columns:1fr}.roca-board-panel{grid-row:auto;grid-row:1}.roca-lessons{grid-row:2}.roca-computer-panel,.roca-online-panel,.roca-free-panel{grid-row:3}.roca-piece{font-size:clamp(24px,8vw,52px)}.roca-app{min-height:0}}@media(max-width:460px){.roca-app{padding:10px;border-radius:12px}.roca-panel{padding:11px}.roca-header{gap:9px}.roca-mark{width:42px;height:42px;font-size:26px;border-radius:12px}.roca-header p{font-size:12px}.roca-theme{font-size:11px!important;padding:7px!important}.roca-tabs{gap:5px}.roca-tabs button{font-size:12px;padding:8px}.roca-online-actions{grid-template-columns:1fr}.roca-square.selected{box-shadow:inset 0 0 0 3px #facc15}}

.roca-square.lesson-from{box-shadow:inset 0 0 0 4px #0ea5e9}.roca-square.lesson-to{box-shadow:inset 0 0 0 4px #15b8a6}.roca-square.lesson-from .roca-piece,.roca-square.lesson-to .roca-piece{filter:drop-shadow(0 0 4px #facc15)}