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button:not(.square){min-height:44px}.square.white-piece{color:#fff7dc;text-shadow:-1px -1px 0 #17231b,1px -1px 0 #17231b,-1px 1px 0 #17231b,1px 1px 0 #17231b}.square small{color:#152118;text-shadow:none}.square.last-move{box-shadow:inset 0 0 0 3px #d6bf68}.square.selected{box-shadow:inset 0 0 0 3px #ffe4a2}

#training:has(.task){display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.mini-board{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));max-width:240px;margin:14px 0;border-radius:4px;overflow:hidden}.mini-square{aspect-ratio:1;display:flex;align-items:center;justify-content:center;background:#cdd3ba;color:#111;font-size:23px}.mini-square.dark{background:#68836c}.mini-square.white-piece{color:#fff7dc;text-shadow:-1px -1px 0 #17231b,1px 1px 0 #17231b}.task summary{font-size:12px;cursor:pointer;color:#bed89e}@media(max-width:760px){#training:has(.task){grid-template-columns:1fr}.mini-board{max-width:280px}}

.board{grid-template-rows:repeat(8,minmax(0,1fr))}.square{min-height:0;line-height:1}.square small{line-height:1}@media(max-width:760px){.square{font-size:clamp(24px,8vw,36px)}}

[hidden]{display:none!important}.mode-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}.mode-tabs button{background:#26372c;color:#c4d5bf;border:1px solid #455b48}.mode-tabs button.active{background:#bddb91;color:#16211a}input{background:#101b15;border:1px solid #435644;color:#e0e8d9;padding:11px;border-radius:8px;max-width:100%}#auth-form{display:flex;align-items:end;flex-wrap:wrap;gap:12px}#auth-form label{display:grid;gap:6px}.check-label{display:flex;align-items:start;gap:8px;margin:18px 0;line-height:1.6}.check-label input{margin-top:4px}.history-item{display:block;width:100%;text-align:left;background:#273b2e;color:#d4e4cb;margin-top:8px;font-weight:normal;font-size:12px;overflow-wrap:anywhere}.server-item{border-left:3px solid #bddb91}.clocks{display:flex;justify-content:space-between;margin:12px 0;font-variant-numeric:tabular-nums;font-size:20px;color:#d9eacb}.mini-square{padding:0;border-radius:0;min-height:0!important;line-height:1;cursor:pointer}.mini-square.selected{box-shadow:inset 0 0 0 3px #e2ba66}.mini-board{grid-template-rows:repeat(8,minmax(0,1fr));aspect-ratio:1}.exercise-feedback{min-height:28px}#invite-code{width:320px}#online-panel .controls label{display:grid;gap:8px}#history{max-height:360px;overflow:auto}@media(max-width:760px){.mode-tabs{display:grid;grid-template-columns:1fr}.mode-tabs button{text-align:left}.workspace{grid-template-columns:minmax(0,1fr)}#auth-form{display:grid;grid-template-columns:1fr}#auth-form input{width:100%}#invite-code{width:100%}}

#start-fen{width:100%;box-sizing:border-box}#chat-messages{max-height:280px;overflow:auto;overflow-wrap:anywhere;white-space:pre-wrap}#chat-messages p{padding:10px;border-bottom:1px solid #ffffff18}#chat-messages strong{font-size:.8rem;color:#b6c7b7}#chat-panel textarea{width:100%;box-sizing:border-box}input[type=checkbox]{width:auto}
header .language-toggle{flex:0 0 auto;min-width:48px;padding:8px 12px}@media(max-width:760px){header{flex-wrap:wrap;gap:12px}.brand{margin-right:auto}}