:root{font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#e6edf1;background:#0d141a;font-synthesis:none;-webkit-tap-highlight-color:transparent}*{box-sizing:border-box}body{margin:0;overflow:hidden}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}.hidden{display:none!important}.topbar{height:64px;background:#101a22;border-bottom:1px solid #2a353e;display:flex;align-items:center;justify-content:space-between;padding:0 18px;gap:10px}.brand{display:flex;align-items:center;gap:10px;white-space:nowrap}.brand-mark{font-size:33px;color:#80e2c9;line-height:1}.brand strong{display:block;font-size:17px;letter-spacing:-.03em}.brand small{font-size:10px;letter-spacing:.13em;color:#75939c}.top-actions{display:flex;align-items:center;gap:8px}.button{border:1px solid #344651;color:#dce6eb;background:#1d2c36;border-radius:9px;min-height:37px;padding:7px 12px;font-size:12px;font-weight:650;white-space:nowrap}.button:hover,.tool:hover{background:#293b45}.button.primary{background:#278e78;color:white;border-color:#319c85}.button.accent{background:#d1f7e9;color:#0f4337;border-color:#d1f7e9}.button.compact{min-height:30px;padding:6px 10px;font-size:11px}.button.icon-button{font-size:23px;padding:3px 10px;min-height:37px}.workspace{height:calc(100dvh - 64px);display:grid;grid-template-columns:72px minmax(0,1fr) 318px}.rail{background:#142029;border-right:1px solid #2a353e;display:flex;flex-direction:column;align-items:stretch;gap:6px;padding:14px 7px}.tool{border:none;border-radius:10px;background:transparent;color:#9eafb6;min-height:64px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:3px}.tool span{font-size:26px;line-height:1}.tool small{font-size:10px}.tool.active{background:#215448;color:#d5fff2}.rail-spacer{flex:1}.stage-shell{position:relative;min-width:0;display:flex;flex-direction:column;background:#0d141a}.stage-top,.stage-bottom{height:57px;display:flex;align-items:center;justify-content:space-between;padding:9px 16px;gap:10px;background:#101a22;border-bottom:1px solid #283540}.stage-bottom{height:47px;border-bottom:0;border-top:1px solid #283540}.stage-top-right,.stage-bottom-right{display:flex;align-items:center;gap:9px}.segmented{background:#0a1218;padding:3px;border-radius:9px;display:flex;gap:3px}.segmented button,.dialog-tabs button{background:transparent;color:#92abb5;border:0;padding:8px 12px;border-radius:7px;font-weight:650;font-size:11px}.segmented button.selected,.dialog-tabs button.selected{color:#e8fff7;background:#295749}.tiny-label{font-size:11px;color:#9caeb7}.compact-select{background:#1b2b34;border:1px solid #344752;border-radius:8px;color:#e5ecee;font-size:11px;padding:7px 5px;max-width:135px}.canvas-host{position:relative;flex:1;min-height:0;overflow:hidden;background-color:#202b31;background-image:linear-gradient(45deg,#2a353b 25%,transparent 25%),linear-gradient(-45deg,#2a353b 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#2a353b 75%),linear-gradient(-45deg,transparent 75%,#2a353b 75%);background-size:24px 24px;background-position:0 0,0 12px,12px -12px,-12px 0}.canvas-host canvas{position:absolute;width:100%;height:100%;inset:0;touch-action:none}#overlayCanvas{cursor:crosshair}.compare-line{position:absolute;top:0;bottom:0;width:2px;background:#f3f0c4;left:50%;pointer-events:none}.compare-knob{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:#f4f1df;color:#22313b;padding:8px;border-radius:100%;font-size:13px;box-shadow:0 2px 14px #000a}.canvas-bottom-left{position:absolute;bottom:13px;left:13px;pointer-events:none;display:flex;gap:8px}.canvas-bottom-left span{font-size:11px;color:#e8ecee;background:#102028dd;border:1px solid #64707855;padding:6px 9px;border-radius:6px}.empty-hint{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;background:#14252b;padding:24px;border-radius:14px}.tooltip{font-size:11px;color:#9bb0b8;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.switch{font-size:11px;color:#b8cbd3;display:flex;align-items:center;gap:8px;cursor:pointer}.switch input{accent-color:#55bda3}.inspector{background:#142029;border-left:1px solid #2a353e;display:flex;flex-direction:column;min-height:0}.inspector-scroll{overflow:auto;overscroll-behavior:contain;flex:1}.panel-section{padding:18px;border-bottom:1px solid #2c3a44}.section-top{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:14px}.eyebrow{font-size:9px;letter-spacing:.16em;color:#7fc7b4;font-weight:800}.section-top h2,.dialog h2{font-size:15px;margin:4px 0 0;letter-spacing:-.02em}.text-button{border:0;background:transparent;color:#85ddc8;padding:4px;font-size:11px;white-space:nowrap}.text-button.danger{color:#ed938a}.preset-current{display:flex;align-items:center;gap:12px;margin-bottom:15px}.preset-current-thumb{width:58px;height:58px;flex-shrink:0;background:repeating-conic-gradient(#1b1b20 0% 25%,#efefed 0% 50%) 50%/20px 20px;border-radius:8px;color:#178677;font-size:28px;display:grid;place-items:center;overflow:hidden}.preset-current-thumb img{width:100%;height:100%;object-fit:cover}.preset-current strong{font-size:13px}.preset-current p{font-size:11px;margin:5px 0;color:#91a8b1;line-height:1.4}.field{margin-bottom:14px}.field:last-child{margin-bottom:0}.field label{display:block;margin-bottom:6px;font-size:11px;color:#b3c5cc}.field-head{display:flex;justify-content:space-between;gap:8px;margin-bottom:4px}.field-head label{margin-bottom:0}.field-head output{font-size:11px;color:#80d7bf;font-variant-numeric:tabular-nums}.field input[type=range],input[type=range]{width:100%;accent-color:#5bc5a9;height:21px;cursor:pointer}.inline-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.field input[type=number],.field input[type=text],.field select,.dialog input[type=number],.dialog input[type=text]{background:#0d1a22;border:1px solid #3b4b56;border-radius:8px;min-height:35px;padding:7px 9px;color:#efffff;width:100%;font-size:13px}.field select{cursor:pointer}.helper{font-size:11px;color:#91a5ac;line-height:1.5;margin:8px 0}.empty-selection{color:#91a5ac;font-size:12px;line-height:1.6}.selection-type{font-size:11px;color:#7fceb8;margin-bottom:12px}.inspector-footer{border-top:1px solid #30404a;padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:8px}.inspector-footer span{font-size:10px;color:#8398a1}.toast{position:absolute;top:16px;left:50%;transform:translateX(-50%);z-index:10;padding:10px 15px;border-radius:9px;background:#21453c;color:#e8fff6;font-size:12px;box-shadow:0 5px 20px #0006;pointer-events:none;max-width:80%;text-align:center}.dialog{border:1px solid #49606a;color:#e5f0f3;background:#14242c;border-radius:16px;width:min(94vw,490px);max-height:min(86dvh,840px);padding:0;box-shadow:0 20px 100px #000b}.dialog::backdrop{background:#041014ba;backdrop-filter:blur(4px)}.dialog.wide-dialog{width:min(96vw,900px)}.dialog-header{padding:23px 23px 17px;display:flex;justify-content:space-between;gap:15px}.dialog-header h2{font-size:21px;margin:5px 0}.dialog-header p{color:#92adb5;font-size:12px;line-height:1.5;margin:7px 0 0}.close-button{font-size:17px;color:#c3d4dc;border:1px solid #475861;background:#20343d;border-radius:9px;width:32px;height:32px;flex-shrink:0}.dialog-body{padding:0 23px 20px;display:flex;flex-direction:column;gap:15px}.dialog-footer{display:flex;justify-content:flex-end;gap:9px;padding:15px 23px 23px}.dialog-tabs{display:flex;gap:7px;padding:0 23px 14px}.dialog-tabs button.selected{background:#2d5b51}.preset-grid{max-height:60dvh;overflow:auto;display:grid;grid-template-columns:repeat(4,1fr);gap:13px;padding:0 23px 23px}.preset-card{border:1px solid #40535e;background:#1b2c35;padding:7px;border-radius:11px;color:#e5f0f3;text-align:left}.preset-card:hover{border-color:#7bd6bf}.preset-card .thumb{aspect-ratio:1.2;background:#111d23;border-radius:7px;overflow:hidden;display:flex;align-items:center;justify-content:center}.preset-card .thumb img{width:100%;height:100%;object-fit:cover}.preset-card strong{display:block;font-size:12px;margin:9px 4px 2px}.preset-card p{font-size:10px;color:#96adb6;margin:0 4px 5px;line-height:1.3}.preset-card .delete-preset{margin:7px 4px 3px;color:#ffaaaa;font-size:10px;text-decoration:underline}.estimate-card{border:1px solid #3b5d59;background:#1a3435;border-radius:10px;padding:15px}.estimate-card small{color:#b4d6cf}.estimate-number{font-size:26px;font-weight:750;margin:6px 0;letter-spacing:-.02em}.warning{background:#4b3d26;border:1px solid #897342;color:#ffe3a9;border-radius:8px;padding:11px;font-size:12px;line-height:1.45}.stack-buttons{display:flex;flex-direction:column;gap:9px}.progress-panel{border-radius:8px;background:#132f30;padding:13px}.progress-bar{height:8px;border-radius:20px;overflow:hidden;background:#263b42}.progress-bar>div{width:0;height:100%;background:#7bd9ba;transition:width .15s}.progress-panel p{font-size:11px;color:#b8cfd3}.precise-toggle{border:0;background:transparent;color:#7bcbb8;font-size:11px;padding:3px 0 12px}.precise-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.color-dot{width:10px;height:10px;display:inline-block;border-radius:100%;background:#6ce0bd}.color-dot.local{background:#9fb6ff}.field-row{display:flex;align-items:center;justify-content:space-between;gap:8px}.field-row label{font-size:11px;color:#c5d7da}.small-action{background:#223743;border:1px solid #3e505b;color:#e8f1f2;border-radius:6px;padding:6px 9px;font-size:11px}@media(max-width:1100px){.workspace{grid-template-columns:62px minmax(0,1fr) 278px}.panel-section{padding:13px}.topbar{padding:0 12px}.preset-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:780px){.workspace{grid-template-columns:57px minmax(0,1fr);grid-template-rows:minmax(0,1fr) 270px}.rail{grid-row:1/3;padding:9px 4px}.tool{min-height:59px}.tool span{font-size:24px}.tool small{font-size:9px}.stage-shell{grid-column:2;grid-row:1}.inspector{grid-column:2;grid-row:2;border-left:0;border-top:1px solid #31404b}.inspector-scroll{display:flex;overflow:auto;min-height:0;align-items:stretch}.panel-section{min-width:260px;max-width:290px;border-right:1px solid #344651;border-bottom:0;overflow:auto}.inspector-footer{display:none}.topbar{height:56px}.workspace{height:calc(100dvh - 56px)}.brand strong{font-size:14px}.brand-mark{font-size:26px}.top-actions{gap:4px}.button{padding:6px 8px}.wide-only{display:none}.stage-top{padding:8px;height:47px}.stage-bottom{padding:6px;height:43px}.preset-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:480px){.brand small{font-size:8px}.brand strong{font-size:12px}.brand-mark{font-size:23px}.topbar{padding:0 8px}.stage-top-right .tiny-label{display:none}.stage-top-right{gap:3px}.stage-top{gap:2px;padding:4px}.segmented button{padding:7px 8px}.stage-top .button{font-size:10px}.stage-bottom .tooltip{max-width:44%}.preset-grid{gap:8px;padding:0 12px 16px}.dialog-header{padding:16px}.dialog-body{padding:0 16px 15px}.dialog-footer{padding:10px 16px 16px}}

/* 0.2: export/seam statuses and tablet-friendly category tabs */
.hidden{display:none!important}
.seam-status{font-size:12px;line-height:1.5;padding:12px;border:1px solid #41545b;border-radius:9px;margin-bottom:10px}
.seam-neutral{background:#1a3039;color:#b9d4db}
.seam-pass{background:#1c3c35;border-color:#3b8c77;color:#b1f2de}
.seam-warn{background:#453526;border-color:#ad8652;color:#ffe2a7}
.dialog-tabs{flex-wrap:wrap}
#seamCheckBtn:disabled{display:none}
#tilePreviewSelect{max-width:114px}
@media(max-width:780px){.dialog-tabs button{padding:6px 8px;font-size:10px}}
@media(max-width:480px){#tilePreviewSelect{max-width:95px}}

#warpLevel{width:100%;border:1px solid #3b4b56;border-radius:8px;background:#0d1a22;color:#eaf8f5;min-height:36px;padding:7px 9px;font-size:12px}

/* 0.3: separate accessible ratio locks and object list for Pencil users. */
.lock-row{padding:7px 10px;margin:0 0 10px;background:#1b3139;border:1px solid #39545a;border-radius:8px;min-height:35px;font-size:12px;color:#d3eae3;max-width:100%}
.lock-row:has(input:not(:checked)){color:#99aeb7;background:transparent}
.object-list-heading{display:flex;justify-content:space-between;font-size:11px;font-weight:650;color:#b7d1cd;letter-spacing:.02em;margin:8px 0 8px}
.object-list-heading span{font-variant-numeric:tabular-nums;color:#83d6ba}
.object-list{display:flex;flex-direction:column;gap:5px;max-height:166px;overflow:auto;margin-bottom:15px;padding-right:2px}
.object-row{display:flex;align-items:stretch;gap:5px}
.object-select{min-width:0;flex:1;text-align:left;background:#172b34;border:1px solid #35515b;border-radius:8px;padding:8px 9px;font-size:11px;color:#b8d0d5;min-height:36px}
.object-select.active{color:#e7fff8;background:#27594d;border-color:#78d8bc}
.object-select .small-type{font-size:10px;color:#8eb5b8;margin-right:6px}
.object-delete{min-width:36px;min-height:36px;background:#302931;border:1px solid #67434c;border-radius:8px;color:#f9b3a9;font-size:15px}
.object-empty{font-size:11px;color:#91a5ac;line-height:1.45;padding:7px 0}
.selection-note{font-size:10px;color:#7fb8b0;line-height:1.5;margin-bottom:8px}

/* 0.4: keep extra mathematical tab reachable on narrow iPads. */
.dialog-tabs{flex-wrap:wrap;row-gap:5px}

/* Version 0.5: portable preset-library controls. */
.preset-library-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:12px 0;padding:10px 0;border-bottom:1px solid rgba(140,171,178,.22)}
.preset-library-actions.hidden{display:none}
.preset-library-actions label{font-size:12px;color:#aec0c7}
.preset-library-actions select{max-width:195px;font-size:12px;padding:8px;background:#16252d;color:#e8f4f3;border:1px solid #47616a;border-radius:7px}

/* 0.6: Compact accordion inspector; grouping does not remove existing controls. */
.inspector-groups-bar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:7px;padding:9px 13px;background:#142029;border-bottom:1px solid #30444c}
.inspector-groups-bar strong{flex:1;font-size:11px;letter-spacing:.02em;color:#d9e9e6}
.inspector-groups-bar button{border:1px solid #365861;border-radius:7px;color:#9de5d1;background:#19333a;font-size:10px;padding:7px;min-height:32px}
.section-toggle{width:34px;min-width:34px;min-height:34px;display:grid;place-items:center;border:1px solid #33525a;background:#1c3640;color:#8ee0c6;border-radius:8px;cursor:pointer;font-size:22px;line-height:1;padding:0}
.section-top h2{cursor:pointer}
.section-toggle .chevron{display:block;transition:transform .16s ease;transform:rotate(180deg)}
.panel-section.is-collapsed .section-toggle .chevron{transform:rotate(0deg)}
.panel-section.is-collapsed .section-top{margin-bottom:0}
.panel-section.is-collapsed>.panel-content{display:none}
.panel-section .panel-content{min-width:0}
.panel-section>.section-top{gap:9px}
.panel-section>.section-top>div{flex:1;min-width:0}
.panel-section>.section-top h2{overflow-wrap:anywhere}
@media(max-width:780px){
 .inspector-scroll{display:block;overflow-y:auto;overflow-x:hidden}
 .panel-section{min-width:0;max-width:none;width:100%;border-right:0;border-bottom:1px solid #344651;overflow:visible}
 .inspector-groups-bar{width:100%}
 .workspace{grid-template-rows:minmax(0,1fr) minmax(250px,37dvh)}
}

.retile-advanced{border:1px solid #315059;border-radius:9px;margin:10px 0;padding:0 10px;background:#162932}
.retile-advanced summary{cursor:pointer;font-size:11px;color:#a7e4d0;font-weight:600;padding:12px 3px;min-height:39px}
.retile-advanced[open]{padding-bottom:10px}
.retile-advanced summary:focus-visible,.section-toggle:focus-visible{outline:2px solid #7bdfc1;outline-offset:2px}

/* 0.6.1: explicit startup diagnostics, visible on iPad even if WebGL fails. */
.startup-problem{position:fixed;z-index:10000;top:max(12px,env(safe-area-inset-top));left:12px;right:12px;max-width:960px;margin:auto;padding:12px 16px;border:2px solid #edb767;background:#2c2322;color:#fff3da;border-radius:12px;box-shadow:0 8px 30px #0009;font-size:13px;line-height:1.5;pointer-events:none}

/* 0.6.2: persistent recovery link */
.support-link{color:#9fe3cb;font-size:12px;padding:8px;text-decoration:underline;white-space:nowrap}
@media(max-width:470px){.support-link{font-size:11px;padding:4px}}

/* v0.7: diagnostic preview legend */
.retile-debug-legend{display:flex;align-items:center;gap:10px;margin:7px 0 12px;padding:9px 10px;border:1px solid rgba(150,205,195,.2);border-radius:10px;background:rgba(0,0,0,.12)}
.retile-debug-legend.hidden{display:none}
.retile-debug-gradient{flex:0 0 90px;height:12px;border-radius:20px;background:linear-gradient(90deg,#23b89f,#ffbd2e,#f53040)}
.retile-debug-legend small{font-size:11px;color:#bfd0d4;line-height:1.4}

/* 0.8: seven preset categories remain reachable on narrow iPad displays. */
.dialog-tabs{overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:thin}
.dialog-tabs button{flex:0 0 auto;white-space:nowrap}

/* 0.8.1: live seamless repeat controls, shown only in seamless mode. */
.repeat-controls{display:flex;align-items:center;gap:8px;min-width:0}
.repeat-controls.hidden{display:none}
.repeat-controls>label:first-child{font-size:11px;color:#a7c0c5;white-space:nowrap}
.repeat-controls .compact-select{max-width:80px;min-width:65px;padding:6px 7px}
.repeat-border-toggle{white-space:nowrap;min-height:32px}
.stage-bottom-right{min-width:0}
@media(max-width:1120px){.repeat-controls>label:first-child{display:none}.repeat-controls{gap:5px}.repeat-border-toggle{font-size:10px}.stage-bottom-right{gap:5px}}
@media(max-width:900px){.repeat-border-toggle span{display:none}.repeat-border-toggle input{width:19px;height:19px}}
@media(max-width:520px){.stage-bottom{gap:4px;padding:5px 6px}.stage-bottom .tooltip{max-width:28%}.repeat-controls .compact-select{min-width:60px}.stage-bottom-right .button{padding:5px 6px}}

/* 0.9 image-quality and seamless controls */
#qualityPanel .field{margin-top:14px}
#seamPanel .switch.lock-row{margin:15px 0}
#exportRepeatSheetBtn{margin-top:9px}
@media(max-width:980px){.repeat-controls{flex-wrap:wrap;gap:6px}.repeat-border-toggle{font-size:11px}}

/* Loop Studio: all controls are hidden by default and comfortable on iPad. */
#animationPanel.hidden{display:none!important}
#animationPanel{border-left:3px solid #9dc8b6;padding-left:13px}
.anim-details{border:1px solid #ffffff26;border-radius:10px;padding:10px;margin:12px 0}
.anim-details>summary{font-weight:650;cursor:pointer;padding:4px 0;user-select:none}
.anim-track{margin:8px 0;padding:9px 0;border-bottom:1px solid #ffffff18}
.anim-track .switch{display:flex;align-items:center;gap:8px}
.anim-track .inline-2{margin-top:7px}
.anim-track input[type=range]{width:100%}
.animation-crop-stage{display:flex;justify-content:center;align-items:center;background:#0b1119;border-radius:10px;min-height:180px;max-height:390px;overflow:hidden;padding:12px}
#animCropPreview{max-width:100%;max-height:350px;touch-action:none;object-fit:contain;cursor:grab;border:1px solid #ffffff52;background:#19232b}
#animCropPreview:active{cursor:grabbing}
#animToggleBtn[aria-expanded=true]{border-color:#9fd9c6;background:#244339;color:#e8fff6}
#animExportBtn:disabled{opacity:.55}

.anim-track .anim-range-summary{font-size:12px;color:#c5d8dc;margin:5px 0 8px}
.anim-track .anim-range-fields input[type=number]{width:100%;min-width:0}

/* 0.10.2: structure-based shape and touch-first animation controls */
.anim-track .anim-slider-pair{display:grid;gap:9px;margin-top:9px}
.anim-track .anim-slider-pair .field{margin:0}
.anim-track .anim-slider-pair input[type=range]{width:100%;min-height:30px;touch-action:pan-y}
.anim-track .anim-speed-row{display:grid;gap:8px;margin-top:8px}
.anim-track output{font-variant-numeric:tabular-nums;color:#91e5d1}
#animationPanel input[type=range]{touch-action:pan-y;min-height:29px;accent-color:#70d9c1}
#animationPanel .anim-track .switch{margin-bottom:8px}

.beta-inline-note{margin:.4rem 0 1rem;padding:.7rem .85rem;border:1px solid rgba(130,240,220,.24);border-radius:12px;background:rgba(40,96,102,.16);color:var(--muted);font-size:.92rem;line-height:1.45}

/* Version 0.11.1: beta controls are invisible for every existing preset. */
.beta-panel{margin:16px 0;padding:14px;border:1px solid #4a8b89;border-radius:12px;background:rgba(43,105,98,.12)}
.beta-panel .eyebrow{color:#78e1cc;letter-spacing:.07em}

/* 0.11.3: independent beta geometry-preservation controls */
.beta-retile-block{margin:12px 0 16px;padding:13px;border:1px solid #315d60;border-radius:12px;background:rgba(20,74,79,.11)}
.beta-retile-block .eyebrow{margin-bottom:8px}
.beta-retile-block .field{margin-top:9px}
.beta-retile-block input[type="range"]:disabled{opacity:.4}

/* 0.11.4 β balance labels */
.beta-balance-labels{display:flex;justify-content:space-between;font-size:.72rem;color:#91b6bd;gap:8px;margin-top:3px;}
.beta-retile-block input[type=range]{touch-action:pan-y;}