:root{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#203d33;background:#f6f7f3;font-synthesis:none;--green:#164d3e;--muted:#748078;--line:#e1e6dd;--gold:#b89b60}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{margin:0;padding-bottom:env(safe-area-inset-bottom)}button,input,select,textarea{font:inherit}button,a,label.dropzone{-webkit-tap-highlight-color:transparent;touch-action:manipulation}button{cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:7px}button:disabled{opacity:.43;cursor:not-allowed}button:focus-visible,a:focus-visible,[tabindex]:focus-visible{outline:3px solid #b89b60;outline-offset:3px}button{min-height:42px;border-radius:9px;padding:10px 15px;border:1px solid transparent;font-size:13px;font-weight:600;transition:background .15s}button:hover:not(:disabled){filter:brightness(.96)}.icon{width:16px;height:16px;flex-shrink:0}.primary{background:var(--green);color:#fff}.secondary{background:#fff;border-color:var(--line);color:#315446}.quiet{background:transparent;color:#567367}.wide{width:100%}.topbar{min-height:78px;padding:env(safe-area-inset-top) 4.3% 0;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#fcfcf9;position:sticky;top:0;z-index:5}.brand{display:flex;align-items:center;gap:12px;color:#183d30;text-decoration:none;font-size:24px;font-weight:650;letter-spacing:-1px}.brand-mark{font-family:serif;border:1px solid #c2ad7c;border-radius:50%;width:42px;height:42px;display:grid;place-items:center;color:#8b733e;font-size:27px;background:#f6efdc;flex-shrink:0}.brand small{display:block;font-size:8px;letter-spacing:2px;margin-top:5px;color:#778074;font-weight:600}.header-right{display:flex;align-items:center;gap:14px}.engine-status{font-size:11px;color:#62796b;display:flex;align-items:center;gap:8px}.engine-status:before{content:'';width:6px;height:6px;background:#b4b7a4;border-radius:100%;flex-shrink:0}.engine-status.ready:before{background:#3d9477;box-shadow:0 0 0 4px #e6f0e7}main{max-width:1500px;margin:auto;padding:28px 4.3% 24px}.intro{display:flex;align-items:center;justify-content:space-between;gap:25px}.eyebrow{font-size:9px;font-weight:750;letter-spacing:1.8px;color:#89917d}h1{font-size:35px;letter-spacing:-1.4px;line-height:1.25;margin:12px 0 10px;font-weight:600}p{font-size:13px;line-height:1.8}.intro p{color:#798276;margin:0;max-width:740px}.steps{display:flex;list-style:none;margin:26px 0 22px;padding:0 0 16px;border-bottom:1px solid var(--line);gap:36px;color:#939d92;font-size:11px}.steps li{display:flex;align-items:center;gap:9px}.steps b{font-size:10px;display:grid;place-items:center;width:25px;height:25px;border:1px solid #dce2d8;border-radius:50%;font-weight:500;flex-shrink:0}.steps .active{color:#28573d;font-weight:650}.steps .active b{background:#e6eddf;border-color:#d5e2cc}.workspace{display:grid;grid-template-columns:285px minmax(0,1fr);gap:22px;align-items:start}.panel{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 5px 18px #203d3303}.input-panel{padding:23px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:4px}.pill{border:1px solid #e0e7dd;background:#f6f8f2;padding:5px 9px;border-radius:6px;font-size:9px;white-space:nowrap;color:#70806c}h2{font-size:19px;letter-spacing:-.4px;margin:15px 0 8px;font-weight:600}.muted{color:var(--muted)}.input-panel>p{font-size:12px;line-height:1.8;margin-top:9px}.dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;border:1.5px dashed #c9d6c2;background:#f8faf5;border-radius:12px;min-height:180px;margin:18px 0 12px;cursor:pointer;text-align:center;transition:background .2s;padding:14px}.dropzone.dragover{background:#e1eddc}.dropzone strong{font-size:12px;font-weight:600}.dropzone span:not(.upload-symbol){font-size:11px;color:#82917d}.dropzone small{font-size:9px;color:#99a08f;margin-top:6px}.upload-symbol{color:#7f9a74;margin-bottom:4px;display:grid;place-items:center}.two{display:grid;grid-template-columns:1fr 1fr;gap:10px}.two button{padding-left:8px;padding-right:8px}.divider{border-top:1px solid var(--line);margin:22px 0 18px;text-align:center}.divider span{font-size:9px;color:#969d91;background:#fff;position:relative;top:-9px;padding:0 7px}.tip{background:#f7f5ec;border-radius:9px;padding:17px;margin-top:20px;border:1px solid #ece8d8}.tip strong{font-size:12px;color:#807044}.tip p{font-size:11px;color:#92886c;line-height:1.8;margin-bottom:0}.analysis-panel{padding:23px;scroll-margin-top:86px}.mobile-quickbar{display:none}.analysis-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}.analysis-heading h2{margin-top:6px}.board-layout{display:grid;grid-template-columns:minmax(250px,1fr) 250px;gap:23px}.viewer{border:1px solid #e9e4d5;background:#f9f5e9;border-radius:13px;padding:13px;position:relative;min-height:240px;display:flex;align-items:center;justify-content:center;overflow:hidden}.chess-board{width:100%;display:block;max-height:570px;user-select:none;touch-action:manipulation}.chess-board [role=button]{cursor:pointer}.photo-board{display:block;width:100%;max-height:570px}.viewer>img{display:block;max-width:100%;max-height:570px;object-fit:contain}.results-title{display:flex;justify-content:space-between;align-items:center;gap:8px}h3{font-size:13px;font-weight:650;margin:5px 0 12px}.small{font-size:10px;line-height:1.8}.empty-result{padding:25px 0 18px}.empty-number{display:block;font-size:62px;font-weight:300;color:#dce3d6;letter-spacing:-4px;margin-bottom:13px}.empty-result p{font-size:12px;color:#8d9788;line-height:1.9;margin-bottom:22px}.analysis-options{margin-top:20px;padding-top:16px;border-top:1px solid var(--line)}label{font-size:11px;color:#637b6e;display:block}select,input[type=password],textarea{border:1px solid var(--line);border-radius:8px;background:#fcfdfb;color:#294b3b;padding:11px;max-width:100%;width:100%;margin-top:8px}select{font-size:13px}textarea{resize:vertical;font-family:ui-monospace,monospace;font-size:12px;line-height:1.6}.slide-caption{font-size:11px;color:#71816f;text-align:center;min-height:24px;margin:10px 0 4px;line-height:1.6}.slider{display:flex;gap:8px;align-items:center;justify-content:center}.slider>button{min-height:36px;min-width:36px;padding:6px}.slide-tabs{display:flex;gap:5px;flex-wrap:wrap;justify-content:center}.slide-tabs button{min-width:32px;min-height:32px;padding:4px 8px;font-size:11px;background:#f2f5ed;color:#7d8b73}.slide-tabs button.active{background:#1d5542;color:white}.result-card{display:block;width:100%;text-align:left;padding:14px 12px;background:#fff;border:1px solid #e5e8df;margin:0 0 10px;border-radius:10px;position:relative}.result-card.active{border-color:#648e6e;background:#f4f8ef;box-shadow:0 0 0 1px #648e6e22}.result-card .rank{font-size:9px;letter-spacing:1px;color:#8a987e}.result-card strong{display:block;font-size:14px;margin:8px 0;color:#31513e}.result-card .score{position:absolute;right:12px;top:13px;font-size:11px;color:#61804e;font-weight:700}.result-card small{font-size:9px;color:#8a9580;font-weight:400}.pv{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:10px;color:#8c977e;margin-top:8px;font-weight:400}.notice{background:#f7f2df;color:#807049;border:1px solid #e8dbb5;border-radius:9px;padding:12px 14px;font-size:12px;line-height:1.7;margin-bottom:14px}.notice.info{background:#edf4ee;color:#446d53;border-color:#d7e4d8}.error{font-size:12px;color:#ae4435;line-height:1.7;margin:12px 0}.toolbar{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:12px}.toolbar button{font-size:12px;padding:8px 12px;min-height:38px}.history{font-size:11px;max-height:180px;overflow:auto;color:#77836e;line-height:2;padding-left:22px}#history-area{border-top:1px solid var(--line);padding-top:16px;margin-top:18px}footer{display:flex;justify-content:space-between;gap:20px;margin:26px 0;padding:0 2px;color:#939b8d;font-size:9px;line-height:1.8}footer i{font-style:normal;margin:0 7px;color:#bac0b2}.hidden{display:none!important}.mobile-only{display:none}dialog{border:1px solid var(--line);border-radius:17px;max-width:850px;width:calc(100% - 24px);max-height:92dvh;overflow-y:auto;padding:0;box-shadow:0 25px 100px #17362b33;color:#203d33}dialog::backdrop{background:#17362b66;backdrop-filter:blur(4px)}.dialog-form{padding:24px}.dialog-heading{display:flex;justify-content:space-between;align-items:center;gap:12px}.dialog-heading h2{margin:6px 0}.close{padding:8px;min-height:36px;min-width:36px}.confirm-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start;margin:18px 0}.confirm-photo{position:relative;line-height:0;border-radius:10px;overflow:hidden;background:#f4f5ef}.confirm-photo img{width:100%;display:block}.confirm-photo svg{width:100%;display:block}.confirm-photo.calibrating{cursor:crosshair;touch-action:none}.corner-dot{position:absolute;width:22px;height:22px;border:2px solid white;background:#207a5b;color:white;border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:700;transform:translate(-50%,-50%);pointer-events:none}.check-row{display:flex;align-items:center;gap:10px;margin:18px 0 7px;line-height:1.6}.check-row input{width:18px;height:18px;accent-color:#164d3e;flex-shrink:0}#settings-dialog,#fen-dialog,#reset-dialog{max-width:520px}.toast{position:fixed;bottom:max(22px,env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);max-width:calc(100vw - 24px);width:max-content;background:#234c3d;color:#fff;padding:13px 20px;border-radius:10px;font-size:12px;z-index:20;box-shadow:0 8px 30px #183a3033;text-align:center}.loading:after{content:'';position:absolute;inset:0;background:#f7f9f0b8;backdrop-filter:blur(2px)}.loading:before{content:'Đang phân tích thế cờ…';position:absolute;z-index:2;background:white;padding:15px 20px;box-shadow:0 5px 30px #183a3020;border-radius:9px;color:#376248;font-size:13px;font-weight:600}.upload-busy{opacity:.6;pointer-events:none}.image-banner{position:absolute;bottom:15px;left:15px;right:15px;background:#153f35ed;color:white;border-radius:8px;text-align:center;padding:13px;font-size:12px;font-weight:650;line-height:1.5}
@media(min-width:1500px){main{padding-top:40px}}
@media(max-width:1150px){.workspace{grid-template-columns:250px minmax(0,1fr)}.board-layout{grid-template-columns:minmax(220px,1fr) 215px;gap:16px}.input-panel,.analysis-panel{padding:18px}.steps{gap:24px}.section-head .pill{display:none}h1{font-size:31px}}
@media(max-width:950px){.workspace{grid-template-columns:230px minmax(0,1fr)}.board-layout{grid-template-columns:1fr}.results-column{padding-top:6px}#results:has(.result-card){display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.result-card{padding:11px 9px;margin:0}.result-card .score{position:static;float:right}.result-card strong{font-size:12px;margin:6px 0 4px}.result-card .rank{font-size:8px}.result-card .pv{display:none}.analysis-options{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.analysis-options select{width:auto;flex:1;margin-top:0}.analysis-options button{width:auto}.empty-result{padding:8px 0}.empty-number{display:none}.steps{gap:18px;font-size:10px}.header-right{gap:8px}}
@media(max-width:820px){
 .topbar{min-height:64px;padding-left:14px;padding-right:14px}
 .brand{font-size:20px;gap:9px}
 .brand-mark{width:34px;height:34px;font-size:22px}
 .brand small{font-size:6.5px;letter-spacing:1.4px;margin-top:3px}
 .engine-status{font-size:10px;max-width:115px;line-height:1.25}
 .header-right{gap:6px}
 .header-right button{font-size:11px;padding:7px 10px;min-height:36px}
 main{padding:14px 12px 20px}
 .intro{align-items:center;gap:12px}
 h1{font-size:24px;margin:6px 0}
 .intro p{font-size:12px;line-height:1.5;display:none}
 .intro>button{font-size:11px;white-space:nowrap;padding:8px 12px;min-height:36px}
 .eyebrow{font-size:8px;letter-spacing:1.2px}
 .steps{gap:6px;justify-content:space-between;margin:12px 0 14px;padding-bottom:12px;font-size:9.5px}
 .steps li{flex-direction:column;gap:5px;text-align:center}
 .workspace{grid-template-columns:1fr;gap:14px}
 body.has-game .analysis-panel{order:-1}
 .mobile-quickbar{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--line)}
 .mobile-quickbar button{min-height:38px;padding:6px 4px;font-size:11px;white-space:nowrap}
 .input-panel,.analysis-panel{padding:14px;border-radius:14px}
 .input-panel h2{margin:8px 0 6px;font-size:17px}
 .dropzone{min-height:115px;margin:12px 0 10px;gap:4px;padding:12px}
 .dropzone small{margin-top:2px}
 .input-panel .tip{display:none}
 .divider{margin:16px 0 10px}
 .input-panel>p{font-size:11px;line-height:1.5}
 .analysis-heading{margin-bottom:12px}
 .analysis-heading h2{font-size:17px;margin:4px 0 0}
 .viewer{padding:6px;min-height:220px;border-radius:11px}
 .chess-board,.photo-board,.viewer>img{max-height:66dvh}
 .board-layout{gap:10px}
 #confirm-move{min-height:46px;font-size:14px;margin-top:10px}
 select,input[type=password],textarea{font-size:16px;padding:10px}
 .confirm-grid{grid-template-columns:1fr;gap:16px;margin:14px 0}
 dialog{width:calc(100% - 16px);max-height:94dvh;border-radius:15px}
 .dialog-form{padding:16px}
 .dialog-heading h2{font-size:17px}
 .dialog-form>p{font-size:12px;line-height:1.5;margin:6px 0 10px}
 .two{grid-template-columns:1fr 1fr;gap:8px}
 #recognition-dialog .two{grid-template-columns:1fr}
 footer{flex-direction:column;gap:4px;margin:18px 0 8px;text-align:center}
 .mobile-only{display:block}
}
@media(max-width:420px){
 #results:has(.result-card){grid-template-columns:1fr}
 .result-card{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px}
 .result-card strong{margin:0;font-size:13px}
 .result-card .score{float:none;order:3}
 .result-card small{display:none}
 .mobile-quickbar{grid-template-columns:repeat(2,1fr)}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}