*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:#161512;color:#e8e6e3;min-height:100dvh;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;gap:16px;padding:10px 16px;background:#262421;flex-wrap:wrap}
.brand{font-size:22px;font-weight:800;letter-spacing:.3px}
.announce{background:#629924;color:#fff;padding:6px 12px;border-radius:6px;font-size:14px}
.top-auth{margin-left:auto;display:flex;gap:10px;align-items:center}
.badge{background:#b58863;color:#111;font-weight:800;font-size:11px;padding:3px 8px;border-radius:4px}
.hidden{display:none!important}
.muted{color:#a7a29a}.small{font-size:13px}
.msg{min-height:18px;color:#f0c674;font-size:14px}.msg.err{color:#ff7b72}
.btn{background:#629924;color:#fff;border:1px solid #629924;padding:9px 14px;border-radius:6px;cursor:pointer;font-weight:600;font-size:15px}
.btn:hover{filter:brightness(1.1)}
.btn.ghost{background:#3a372f;border-color:#4a463f}
.btn.big{width:100%;font-size:17px;padding:12px}
.btn.danger{background:#a33;border-color:#a33}
input,select{padding:10px;border-radius:6px;border:1px solid #4a463f;background:#3a372f;color:#fff;font-size:15px;width:100%}
form{display:flex;flex-direction:column;gap:10px}

/* Full-screen 3-column layout (Lichess-style) */
.layout{flex:1;display:grid;grid-template-columns:280px minmax(0,1fr) 340px;gap:16px;padding:16px;max-width:1600px;width:100%;margin:0 auto;align-items:start}
.panel{background:#262421;border-radius:10px;padding:16px}
.panel h3{margin:4px 0 12px}.panel h4{margin:16px 0 8px}
.field{margin-bottom:16px}.field>span{display:block;font-size:13px;text-transform:uppercase;letter-spacing:.6px;color:#a7a29a;margin-bottom:8px}
.seg{display:flex;gap:6px}
.seg button{flex:1;padding:9px 6px;border-radius:6px;border:1px solid #4a463f;background:#3a372f;color:#fff;cursor:pointer;font-size:14px}
.seg button.on{background:#629924;border-color:#629924;font-weight:700}
.tc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.tc-grid button{padding:9px 4px;border-radius:6px;border:1px solid #4a463f;background:#3a372f;color:#fff;cursor:pointer;text-align:center}
.tc-grid button b{display:block;font-size:15px}
.tc-grid button span{font-size:11px;color:#c9c5bd}
.tc-grid button.on{background:#629924;border-color:#629924}
.tc-grid button.on span{color:#eaf5dd}

/* Board area */
.board-area{display:flex;flex-direction:column;align-items:center;gap:8px;min-width:0}
.board{width:min(100%,calc(100dvh - 250px),760px);min-width:280px;aspect-ratio:1;display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);border-radius:6px;overflow:hidden;box-shadow:0 8px 32px rgba(0,0,0,.5);user-select:none;touch-action:manipulation}
.sq{display:flex;align-items:center;justify-content:center;cursor:pointer;position:relative;font-size:calc(min(100vw,100dvh - 250px,760px)/11)}
.theme-green .sq.light{background:#ebecd0}.theme-green .sq.dark{background:#739552}
.theme-brown .sq.light{background:#f0d9b5}.theme-brown .sq.dark{background:#b58863}
.theme-blue .sq.light{background:#dee3e6}.theme-blue .sq.dark{background:#8ca2ad}
.theme-gray .sq.light{background:#dcdcdc}.theme-gray .sq.dark{background:#8a8a8a}
.sq.sel{box-shadow:inset 0 0 0 4px #f6f669}
.sq.legal::after{content:"";width:30%;height:30%;border-radius:50%;background:rgba(20,20,20,.22);position:absolute;z-index:1}
.sq.legal.cap{box-shadow:inset 0 0 0 5px rgba(20,20,20,.28);border-radius:50%/0}
.sq.last::before{content:"";position:absolute;inset:0;background:rgba(246,246,105,.38)}
.sq.checksq{background:#e06666!important}
.piece{position:relative;z-index:2;line-height:1;pointer-events:none}
.piece.w{color:#fff;text-shadow:0 2px 4px rgba(0,0,0,.7)}
.piece.b{color:#151310;text-shadow:0 1px 2px rgba(255,255,255,.25)}
.coord{position:absolute;font-size:11px;font-weight:700;z-index:2;opacity:.9}
.coord.rank{top:3px;left:4px}.coord.file{bottom:2px;right:4px}
.sq.light .coord{color:#739552}.theme-brown .sq.light .coord{color:#b58863}.theme-blue .sq.light .coord{color:#8ca2ad}.theme-gray .sq.light .coord{color:#8a8a8a}
.sq.dark .coord{color:#ebecd0}.theme-brown .sq.dark .coord{color:#f0d9b5}.theme-blue .sq.dark .coord{color:#dee3e6}.theme-gray .sq.dark .coord{color:#dcdcdc}
.playerbar{width:min(100%,calc(100dvh - 250px),760px);min-width:280px;display:flex;justify-content:space-between;align-items:center;gap:10px}
.pinfo{display:flex;align-items:center;gap:8px;font-weight:600;min-width:0}
.avatar{width:32px;height:32px;border-radius:6px;background:#629924;display:inline-flex;align-items:center;justify-content:center;font-weight:800;flex:none}
.captured{font-size:19px;letter-spacing:1px;white-space:nowrap;overflow:hidden}
.captured .cw{color:#ddd}.captured .cb{color:#888}
.material{color:#a7a29a;font-size:13px}
.clock{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:30px;font-weight:800;background:#262421;padding:4px 14px;border-radius:8px;min-width:118px;text-align:center}
.clock.active{background:#0e0d0b;box-shadow:inset 0 0 0 2px #629924}
.clock.low{background:#7a1f1f;color:#ffd7d7}
.clock.flag{background:#a33;color:#fff}
.status{font-size:17px;font-weight:700;min-height:22px;text-align:center}
.controls{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.promo{display:flex;gap:8px;align-items:center}
.promo button{font-size:30px;padding:4px 12px;border-radius:6px;border:1px solid #4a463f;background:#3a372f;color:#fff;cursor:pointer}

/* Right panel */
.moves{max-height:300px;overflow:auto;padding-left:26px;line-height:1.8;margin:0 0 8px}
.saved{list-style:none;padding:0;margin:0}
.saved li{padding:6px 0;border-bottom:1px solid #3a372f;font-size:12.5px;word-break:break-word}
.admin-stats{font-size:14px;color:#c9c5bd}
.check{display:flex;gap:8px;align-items:center;font-size:14px;margin-bottom:10px}
.check input{width:auto}
#adminPanel input{margin-bottom:10px}
.admin-users .urow,.admin-games .grow{display:flex;gap:6px;align-items:center;flex-wrap:wrap;padding:7px 0;border-bottom:1px solid #3a372f;font-size:13.5px}
.urow .uname{font-weight:700}
.urow button,.grow button{padding:4px 8px;font-size:12px;border-radius:5px;border:1px solid #4a463f;background:#3a372f;color:#fff;cursor:pointer}
.urow button:hover,.grow button:hover{filter:brightness(1.2)}
footer{text-align:center;color:#a7a29a;padding:14px;font-size:13px}

/* Mobile: single column, board first and full width */
@media(max-width:1020px){
  .layout{grid-template-columns:1fr;padding:10px}
  .board-area{order:-1}
  .board,.playerbar{width:min(100%,calc(100dvh - 235px))}
  .clock{font-size:24px;min-width:96px}
}
@media(max-width:480px){
  .brand{font-size:19px}
  .captured{font-size:16px}
  .board,.playerbar{width:100%}
}

.opening{color:#9fb4d8;font-size:13px;min-height:16px}
.ctxinfo{background:#1d2a44;border:1px solid #35507e;border-radius:8px;padding:8px 10px;font-size:14px}
.chatbox{margin-top:10px;background:#141a29;border:1px solid #2b3560;border-radius:10px;padding:8px}
.chatmsgs{max-height:150px;overflow:auto;font-size:13px;display:flex;flex-direction:column;gap:4px;margin-bottom:8px}
.chatmsgs .cm b{color:#ffd76a}
.chatrow{display:flex;gap:6px}.chatrow input{flex:1}
.leaderboard table{width:100%;border-collapse:collapse;font-size:13px}
.leaderboard td,.leaderboard th{padding:3px 4px;border-bottom:1px solid #2b3560;text-align:left}
.puz-level{margin-bottom:10px}
.puz-level h4{margin:6px 0}
.puz-btn{margin:2px;padding:4px 8px;border-radius:6px;border:1px solid #35507e;background:#1d2a44;color:#e8ecf4;cursor:pointer;font-size:12px}
.puz-btn.solved{background:#1e4634;border-color:#2e7d52}
.puz-btn.locked{opacity:.45;cursor:not-allowed}
.puz-btn.daily{border-color:#ffd76a}
.saved button{margin-left:6px}