:root{--app-max:820px;--scanner-blue:#071521;--scanner-panel:#0b2030;--scanner-panel-2:#0d2638;--scanner-line:#28465c;--scanner-control:#102c40;--scanner-accent:#25a7ff;--scanner-orange:#ff7a2f;--safe-top:env(safe-area-inset-top);--safe-right:env(safe-area-inset-right);--safe-bottom:env(safe-area-inset-bottom);--safe-left:env(safe-area-inset-left)}
html{background:var(--scanner-blue)}
body{min-height:100dvh;background:radial-gradient(circle at 50% -10%,#12364e 0,#071521 44%,#06111c 100%);overflow-x:hidden}
body.sheet-open{overflow:hidden}
[hidden]{display:none!important}
button,label{touch-action:manipulation}
.app-topbar{box-sizing:content-box;height:76px;padding:env(safe-area-inset-top) max(14px,env(safe-area-inset-right)) 0 max(14px,env(safe-area-inset-left));background:rgba(5,18,29,.94);border-bottom:1px solid #31536b;backdrop-filter:blur(18px)}
.brand-lockup{appearance:none;border:0;background:transparent;color:var(--text);height:100%;display:flex;align-items:center;gap:12px;padding:0;font:inherit;text-align:left;cursor:pointer}
.brand-lockup>i{font-size:31px;color:#efb15f;filter:drop-shadow(0 3px 9px rgba(239,177,95,.22))}
.caissa-wordmark{display:flex;flex-direction:column;gap:1px;line-height:1}
.caissa-wordmark strong{font-size:18px;letter-spacing:.21em}
.caissa-wordmark small{font-size:11px;letter-spacing:.34em;color:#efb15f;margin-top:5px}
.brand-divider{width:1px;height:38px;background:#648096;margin-left:2px}
.scanner-name{font-size:20px;font-weight:800}
.app-shell{width:min(var(--app-max),100%);margin:0 auto;padding:0 max(12px,var(--safe-right)) calc(30px + var(--safe-bottom)) max(12px,var(--safe-left))}
.scanner-home{min-height:calc(100dvh - 77px - env(safe-area-inset-top));display:flex;flex-direction:column;justify-content:center;padding:28px 0}
.scanner-reading{min-height:calc(100dvh - 77px - var(--safe-top));display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:28px 16px calc(28px + var(--safe-bottom))}.reading-indicator{width:72px;height:72px;border-radius:24px;display:grid;place-items:center;background:linear-gradient(145deg,#e0a74d,#f4c36b);color:#151009;font-size:28px;box-shadow:0 14px 38px rgba(217,164,65,.24);animation:reading-pulse 1.1s ease-in-out infinite}.scanner-reading h1{font-size:26px;margin:20px 0 7px}.scanner-reading h1:focus{outline:none}.scanner-reading p{margin:0;color:var(--muted);font-size:13px}@keyframes reading-pulse{50%{transform:scale(.96);opacity:.78}}
.home-hero{text-align:center;padding:6px 10px 28px}
.home-mark{width:74px;height:74px;border-radius:24px;margin:0 auto 18px;display:grid;place-items:center;background:linear-gradient(145deg,#e0a74d,#f4c36b);color:#151009;font-size:30px;box-shadow:0 14px 38px rgba(217,164,65,.24)}
.home-hero h1{font-size:clamp(32px,9vw,48px);line-height:1.02;margin:0 0 14px}
.home-hero p{font-size:16px;line-height:1.45;color:var(--muted);margin:0 auto;max-width:560px}
.home-actions{display:flex;flex-direction:column;align-items:center;gap:8px;border:1px solid var(--scanner-line);border-radius:20px;padding:28px 18px;background:linear-gradient(180deg,rgba(13,38,56,.9),rgba(8,27,41,.9))}
.home-actions.dragging{border-color:var(--scanner-accent);background:#0d3048}
.home-scan-launch,.new-scan-button{appearance:none;border:0;border-radius:50%;display:grid;place-items:center;color:#071521;background:linear-gradient(145deg,#fff,#cbd4dd);box-shadow:0 12px 34px rgba(0,0,0,.42),inset 0 0 0 1px rgba(255,255,255,.8);cursor:pointer}
.home-scan-launch{width:84px;height:84px;font-size:31px;margin-bottom:4px}
.home-scan-launch:focus-visible,.new-scan-button:focus-visible,.board-navigation button:focus-visible,.analyze-control:focus-visible,.edit-toolbar button:focus-visible,.edit-settings button:focus-visible,.edit-palette button:focus-visible,.scan-choice:focus-visible,.sheet-head button:focus-visible{outline:2px solid #59b9ff;outline-offset:2px}
.home-actions>strong{font-size:16px}
.home-actions>span{font-size:12px;color:var(--muted)}
.home-foot{margin-top:22px;display:flex;align-items:center;justify-content:center;gap:8px;color:var(--muted);font-size:11px}
.scanner-workspace{padding-top:8px}
.board-workspace{background:rgba(8,28,43,.9);border:1px solid rgba(44,77,99,.75);border-radius:16px;padding:8px;box-shadow:0 16px 42px rgba(0,0,0,.24)}
.position-toolbar{height:54px;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:0 0 8px}
.side-to-move{min-width:0;display:flex;align-items:center;gap:9px;color:#e8eef5;font-size:12px;font-weight:750}
.side-piece{width:36px;height:36px;border-radius:12px;display:grid;place-items:center;background:#102c40;box-shadow:inset 0 0 0 1px #49657a}
.side-piece img{width:34px;height:34px;object-fit:contain}.side-piece.black{background:#d8e1e8;box-shadow:inset 0 0 0 1px #fff}
.position-actions{display:flex;flex-wrap:nowrap;gap:7px}
.position-actions button{appearance:none;width:44px;height:44px;border-radius:11px;border:1px solid #35566d;background:linear-gradient(180deg,#102c40,#0b2030);color:#f4f7fb;display:grid;place-items:center;font-size:17px;cursor:pointer;box-shadow:0 5px 12px rgba(0,0,0,.16)}
.position-actions button:focus-visible{outline:2px solid #59b9ff;outline-offset:2px}.position-actions .save-diagram-action[data-diagram-state="unsaved"] i{color:#f1b654}
.position-actions button:active,.board-navigation button:active{background:#183b52;transform:translateY(1px)}
.board-shell{width:100%!important;max-width:none!important}
.scanner-board{width:var(--scanner-board-size,100%)!important;height:var(--scanner-board-size,auto)!important;border:0!important;border-radius:8px!important;box-shadow:0 7px 23px rgba(0,0,0,.28)}
.sq .piece-img{width:88%;height:88%;object-fit:contain;display:block;pointer-events:none;filter:drop-shadow(0 1px 1px rgba(0,0,0,.28))}
.sq .piece-img[hidden]{display:none}
.sq[data-file]::after{content:attr(data-file);position:absolute;left:4px;bottom:1px;font:800 10px/1 system-ui;color:rgba(255,255,255,.82);text-shadow:0 1px 2px rgba(0,0,0,.65)}
.sq.light[data-file]::after{color:rgba(83,57,34,.82);text-shadow:none}
.sq[data-rank]::before{content:attr(data-rank);position:absolute;right:4px;top:3px;font:800 10px/1 system-ui;color:rgba(255,255,255,.82);text-shadow:0 1px 2px rgba(0,0,0,.65)}
.sq.light[data-rank]::before{color:rgba(83,57,34,.82);text-shadow:none}
.scanner-board.coordinates-hidden .sq[data-file]::after,.scanner-board.coordinates-hidden .sq[data-rank]::before{display:none}
.recognition-summary{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 4px 2px}
.recognition-summary[hidden]{display:none}
.recognition-summary>div{display:flex;flex-direction:column;gap:2px}
.recognition-summary strong{font-size:13px}.recognition-summary span{font-size:11px;color:var(--muted)}
.confidence-chip{white-space:nowrap;border:1px solid var(--scanner-line);border-radius:999px;padding:5px 8px}
.confirm-bar{padding-top:8px}.confirm-bar .btn{min-height:46px;border-radius:11px;font-size:14px;margin-top:0}
.board-navigation{height:64px;margin-top:8px;display:grid;grid-template-columns:repeat(7,1fr);gap:3px;border-radius:12px;background:linear-gradient(180deg,#0c2638,#091e2d);border:1px solid rgba(43,73,94,.8);padding:5px}
.board-navigation button{appearance:none;border:0;background:transparent;color:#d8e3ed;border-radius:9px;font-size:19px;display:grid;place-items:center;cursor:pointer}
.board-navigation .coordinate-visibility-control{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:14px}.coordinate-visibility-control span{font-size:7px;font-weight:850;letter-spacing:.02em;line-height:1}
.board-navigation button:disabled{opacity:.3;cursor:default;transform:none}
.analysis-workspace{margin-top:8px;background:linear-gradient(180deg,#0c2638,#091e2d);border:1px solid rgba(43,73,94,.8);border-radius:12px;padding:5px}
.analysis-controls{display:flex;align-items:center;justify-content:space-between;gap:10px}
.analyze-control{appearance:none;border:2px solid var(--scanner-accent);background:linear-gradient(135deg,#113b5b,#173954);color:#f5f9fc;border-radius:11px;min-height:50px;min-width:150px;padding:8px 22px;display:flex;align-items:center;justify-content:center;gap:9px;font:800 14px/1 system-ui;cursor:pointer;box-shadow:inset 0 0 18px rgba(37,167,255,.08)}
.analyze-control:disabled{opacity:.7}.analyze-control i{font-size:18px}
.engine-control{display:flex;align-items:center;gap:10px;font-size:15px;color:#e7eef5;cursor:pointer;padding-right:7px}
.engine-control input{position:absolute;opacity:0;pointer-events:none}
.toggle-track{position:relative;width:54px;height:30px;border-radius:999px;background:#405368;box-shadow:inset 0 1px 3px rgba(0,0,0,.4);transition:.18s}
.toggle-track>span{position:absolute;left:3px;top:3px;width:24px;height:24px;border-radius:50%;background:#f7f9fb;box-shadow:0 2px 7px rgba(0,0,0,.4);transition:.18s}
.engine-control input:checked+.toggle-track{background:var(--scanner-orange)}
.engine-control input:checked+.toggle-track>span{transform:translateX(24px)}
.engine-control input:focus-visible+.toggle-track{outline:2px solid #fff;outline-offset:2px}
.new-scan-control{display:flex;flex-direction:column;align-items:center;gap:7px;padding:18px 0 max(4px,var(--safe-bottom))}
.new-scan-button{width:76px;height:76px;font-size:28px}
.new-scan-button:active,.home-scan-launch:active{transform:scale(.97)}
.new-scan-control>span{font-size:11px;color:var(--muted);font-weight:700;letter-spacing:.03em}
.sheet-backdrop{position:fixed;inset:0;z-index:49;background:rgba(2,10,17,.62);touch-action:none}.export-sheet,.new-scan-sheet{position:fixed;left:50%;transform:translateX(-50%);bottom:0;width:min(var(--app-max),100%);z-index:50;background:#0d2233;border:1px solid #35566d;border-bottom:0;border-radius:22px 22px 0 0;padding:12px max(14px,var(--safe-right)) calc(18px + var(--safe-bottom)) max(14px,var(--safe-left));box-shadow:0 -20px 60px rgba(0,0,0,.62);max-height:calc(82dvh - var(--safe-top));overflow:auto;overscroll-behavior:contain}
.sheet-head{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;margin-bottom:12px}.sheet-head strong{text-align:center}.sheet-head button{appearance:none;border:0;background:transparent;color:#c7d3df;padding:10px;font:inherit}.sheet-head button:last-child{text-align:right}.sheet-head .apply{color:#48b5ff;font-weight:800}
.sheet-head button{min-height:44px}.review-edit-view{padding-top:5px}.review-edit-view .board-workspace{padding-top:5px}
.edit-workspace{display:flex;flex-direction:column;gap:6px}.edit-toolbar{display:flex;align-items:center;justify-content:space-between;gap:8px}.edit-primary-actions,.edit-icon-actions{display:flex;align-items:center;gap:5px}.edit-toolbar button,.edit-settings button{appearance:none;border:1px solid #365970;background:linear-gradient(180deg,#102c40,#0b2030);color:#f4f7fb;border-radius:9px;min-height:44px;font:800 11px/1 system-ui;cursor:pointer}.edit-primary-actions button{padding:0 13px}.edit-primary-actions .edit-apply{background:linear-gradient(135deg,#168bd7,#246ac6);border-color:#4bb7ff;gap:6px}.edit-primary-actions .edit-cancel{color:#d8e3ed}.edit-icon-actions button{position:relative;width:44px;display:grid;place-items:center;font-size:16px}.edit-icon-actions button>span{position:absolute;right:-3px;top:-5px;border-radius:999px;padding:3px 5px;background:#332a73;color:#e4dfff;font-size:7px;letter-spacing:.04em}.edit-settings{display:grid;grid-template-columns:minmax(105px,1.55fr) repeat(4,minmax(48px,1fr));gap:4px}.edit-settings>button{min-width:0;padding:4px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:9px}.edit-settings>button i{font-size:13px}.turn-selector{display:grid;grid-template-columns:1fr 1fr;border:1px solid #365970;border-radius:9px;overflow:hidden;background:#091e2d}.turn-selector button{appearance:none;border:0;background:transparent;color:#9eb0bf;min-width:0;min-height:44px;padding:4px 3px;font:800 9px/1 system-ui;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px}.turn-selector button[aria-pressed="true"]{background:#173f5b;color:#fff;box-shadow:inset 0 0 0 2px #45b2fa}.turn-dot{width:12px;height:12px;border-radius:50%;display:block}.turn-dot.white{background:#fff;border:1px solid #bdc9d2}.turn-dot.black{background:#02070b;border:1px solid #91a6b5}.edit-settings button[aria-pressed="true"],.edit-palette button[aria-pressed="true"]{border-color:#53beff!important;background:#16496a!important;box-shadow:0 0 0 2px #071521,0 0 0 4px #53beff,inset 0 0 18px rgba(83,190,255,.2)}
.castling-panel{display:grid;grid-template-columns:auto repeat(4,1fr);align-items:center;gap:5px;padding:7px;border:1px solid #365970;border-radius:9px;background:#0a1c2b}.castling-panel>strong{font-size:9px;color:#91a8ba}.castling-panel label{display:flex;align-items:center;justify-content:center;gap:3px;min-height:34px;border-radius:7px;background:#102c40;color:#c9d6e0;font-size:8px;text-align:center}.castling-panel input{accent-color:#25a7ff}.edit-tool-status{min-height:28px;display:flex;align-items:center;justify-content:center;gap:7px;border-radius:8px;background:#091c2b;color:#9db2c2;font-size:10px;font-weight:750}.edit-tool-status.is-active{background:#123a54;color:#fff;box-shadow:inset 0 0 0 1px #3baef8}.edit-palette{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:5px;padding:5px 6px;border:1px solid #31536b;border-radius:10px;background:#091c2b}.edit-palette button{appearance:none;border:2px solid transparent;background:transparent;border-radius:8px;min-width:0;height:48px;padding:0;display:grid;place-items:center;cursor:pointer}.edit-palette img{width:43px;height:43px;max-width:100%;object-fit:contain;pointer-events:none}.black-palette{margin-bottom:1px;background:linear-gradient(180deg,#132f42,#0b2233)}.edit-board-footer{display:flex;flex-direction:column;gap:5px;padding-top:6px}.white-palette{background:linear-gradient(180deg,#132f42,#0b2233)}.edit-validation{min-height:28px;border:1px solid #294b62;border-radius:8px;padding:7px 9px;color:#9db2c2;background:#091c2b;font-size:9px;line-height:1.25;text-align:center}.edit-validation.ok{border-color:rgba(88,197,140,.6);color:#75d9a6}.edit-validation.error{border-color:rgba(239,107,115,.62);color:#ff9ca4}
.orientation-review{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;align-items:center;padding:8px;border:1px solid #d29a3f;border-radius:9px;background:rgba(210,154,63,.09)}.orientation-review>div:first-child{display:flex;flex-direction:column;gap:2px;min-width:0}.orientation-review strong{font-size:10px;color:#ffd58c}.orientation-review span,.orientation-review small{font-size:8px;line-height:1.25;color:#cbd7e1}.orientation-review-actions{display:grid;grid-template-columns:1fr 1fr;gap:4px}.orientation-review-actions button{appearance:none;border:1px solid #496b81;border-radius:7px;background:#102c40;color:#edf4f9;min-height:36px;padding:4px 7px;font:800 8px/1.15 system-ui}.orientation-review-actions button[aria-pressed="true"]{border-color:#45b7ff;background:#174764;box-shadow:inset 0 0 0 1px #45b7ff}@media(max-width:430px){.orientation-review{grid-template-columns:1fr}.orientation-review-actions button{min-height:34px}}
.scanner-popover{position:fixed;z-index:70;width:min(330px,calc(100vw - max(16px,env(safe-area-inset-left)) - max(16px,env(safe-area-inset-right))));max-height:calc(100dvh - max(16px,env(safe-area-inset-top)) - max(16px,env(safe-area-inset-bottom)));overflow:auto;padding:8px;background:linear-gradient(180deg,rgba(12,35,52,.98),rgba(7,25,39,.99));border:1px solid #315570;border-radius:15px;box-shadow:0 18px 46px rgba(0,0,0,.58);overscroll-behavior:contain}.scanner-popover:focus{outline:none}.menu-group+.menu-group{margin-top:6px;padding-top:7px;border-top:1px solid #294a61}.menu-group-label{display:block;padding:6px 10px 4px;color:#7994a8;font-size:10px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.menu-row{appearance:none;width:100%;min-height:58px;border:0;border-radius:10px;background:transparent;color:var(--text);display:flex;align-items:center;gap:12px;text-align:left;padding:9px 10px;font:inherit;cursor:pointer}.menu-row:hover,.menu-row:focus-visible{background:#12344b;outline:2px solid rgba(71,177,248,.7);outline-offset:-2px}.menu-row>i{flex:0 0 24px;width:24px;text-align:center;color:#efb15f;font-size:18px}.menu-row span{min-width:0;display:flex;flex:1;flex-direction:column;gap:3px}.menu-row strong{font-size:13px;line-height:1.2}.menu-row small{color:var(--muted);font-size:10px;line-height:1.25}.menu-row em{flex:0 0 auto;border-radius:999px;padding:4px 7px;background:#332a73;color:#ded8ff;font-size:9px;font-style:normal;font-weight:800}.product-menu .menu-row:nth-of-type(1)>i{color:#50d993}.product-menu .menu-row:nth-of-type(2)>i{color:#ff5d6d}.account-group .menu-row:nth-of-type(1)>i{color:#55b5ff}.account-group .menu-row:nth-of-type(2)>i,.analysis-menu .caissa-row>i{color:#f5b849}.logout-row>i,.logout-row strong{color:#ff86aa}.analysis-menu .menu-row:nth-of-type(2)>i{color:#75bf46}
.export-row,.scan-choice{appearance:none;width:100%;border:0;border-top:1px solid #29465b;background:transparent;color:#59b9ff;display:flex;align-items:center;justify-content:center;gap:12px;padding:18px 12px;font:800 18px/1.2 system-ui}.export-row i,.scan-choice i{width:24px}.scan-choice:last-child{border-bottom:1px solid #29465b}
.source-preview-wrap{margin:12px 0 0}.source-preview-wrap img{width:100%;max-height:220px;object-fit:contain;border-radius:10px;background:#07111b}.source-preview-wrap figcaption{color:var(--muted);font-size:11px;margin-top:7px}
.app-toast{position:fixed;left:50%;bottom:calc(22px + env(safe-area-inset-bottom));transform:translateX(-50%);z-index:80;width:min(90%,520px);background:#18344a;border:1px solid #486b84;color:var(--text);padding:12px 14px;border-radius:14px;text-align:center;font-size:12px;box-shadow:0 12px 30px rgba(0,0,0,.4)}
.analysis-footer code{display:none!important}
.edit-settings{grid-template-columns:minmax(100px,1.55fr) repeat(6,minmax(38px,1fr))}
@media(prefers-reduced-motion:reduce){.reading-indicator{animation:none}}
@media(max-width:430px){.app-topbar{height:66px}.brand-lockup{gap:9px}.brand-lockup>i{font-size:26px}.caissa-wordmark strong{font-size:16px}.caissa-wordmark small{font-size:9px}.brand-divider{height:33px}.scanner-name{font-size:18px}.app-shell{padding-left:max(3px,var(--safe-left));padding-right:max(3px,var(--safe-right))}.board-workspace{padding:3px}.position-toolbar{padding-left:4px;padding-right:4px}.side-to-move{font-size:0}.side-piece{width:38px;height:38px}.position-actions button{width:43px;height:43px}.board-navigation{height:58px}.analyze-control{min-width:132px;padding:8px 16px}.engine-control{font-size:14px}.new-scan-control{padding-top:16px}.edit-primary-actions button{padding:0 10px}.edit-settings{grid-template-columns:minmax(98px,1.5fr) repeat(4,minmax(45px,1fr))}.edit-palette button{height:44px}.edit-palette img{width:40px;height:40px}}
@media(max-width:430px){.edit-settings{grid-template-columns:minmax(88px,1.4fr) repeat(6,minmax(35px,1fr))}}
@media(max-height:740px) and (orientation:landscape){.app-topbar{height:52px}.scanner-workspace{padding-top:5px}.board-workspace{max-width:calc(100dvh - 80px);margin:0 auto}.review-edit-view.edit-mode .edit-settings{grid-template-columns:repeat(3,minmax(0,1fr))}.new-scan-control{padding:10px 0}.new-scan-button{width:62px;height:62px}.export-sheet,.new-scan-sheet{max-height:92dvh}.scanner-popover{max-height:calc(100dvh - 12px)}}
@media(min-width:821px){.scanner-home{min-height:720px}.board-workspace{padding:12px}.scanner-workspace{padding-top:16px}.export-sheet,.new-scan-sheet{bottom:auto;top:50%;transform:translate(-50%,-50%);border-radius:22px;border-bottom:1px solid #35566d;max-height:80vh}.position-actions button{width:48px;height:48px}.position-toolbar{height:58px}}