:root{--bg: #f6f6f4;--surface: #ffffff;--surface-2: #f0f0ec;--canvas-bg: #ebebe8;--border: #dddcd6;--border-focus: #6d8f1a;--accent: #8aad1a;--accent-hover: #7a9a16;--accent-text: #1c1c18;--accent-muted: rgba(138, 173, 26, .14);--snap: #0a8fad;--snap-muted: rgba(10, 143, 173, .12);--text: #1c1c18;--text-muted: #5a5a54;--text-faint: #888880;--danger: #c53030;--cut-line: #1c1c18;--cut-shadow: #ffffff;--radius: 8px;--font-sans: "Instrument Sans", system-ui, sans-serif;--font-mono: "DM Mono", ui-monospace, monospace;--header-h: 52px;--sidebar-w: 300px;--email-preview-width: 600px;--grip-w: 56px;--hit-min: 44px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--focus-ring: 0 0 0 2px var(--surface), 0 0 0 4px var(--border-focus)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{color-scheme:light}html,body{height:100%}#root{display:flex;flex-direction:column;height:100%;overflow:hidden}body{font-family:var(--font-sans);font-size:14px;background:var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased}:focus-visible{outline:none;box-shadow:var(--focus-ring)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.header{height:var(--header-h);flex-shrink:0;padding:0 20px;display:flex;align-items:center;border-bottom:1px solid var(--border);background:var(--surface)}.header__title{display:flex;flex-direction:column;gap:0}.header__logo{font-family:var(--font-mono);font-size:13px;font-weight:500;letter-spacing:.06em;color:var(--accent)}.header__tagline{font-size:12px;color:var(--text-muted);font-weight:400}.app-layout{display:flex;flex:1;min-height:0;overflow:hidden}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.panel-section{padding:16px;border-bottom:1px solid var(--border)}.panel-section--compact{padding-top:12px;padding-bottom:12px}.panel-section--grow{flex:1;display:flex;flex-direction:column;min-height:0;overflow:hidden}.panel-section__header{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px}.panel-label{font-size:12px;font-weight:600;color:var(--text)}.panel-label--inline{margin-bottom:0}.sidebar__footer{padding:16px;border-top:1px solid var(--border);margin-top:auto}.drop-zone{border:1px dashed var(--border);border-radius:var(--radius);background:var(--bg);transition:border-color .15s,background .15s}.drop-zone--active,.drop-zone:focus-within{border-color:var(--accent);background:var(--accent-muted)}.drop-zone__input{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden}.drop-zone__label{display:flex;flex-direction:column;align-items:center;gap:4px;padding:20px 16px;cursor:pointer;text-align:center}.drop-zone__title{font-size:14px;font-weight:500;color:var(--text)}.drop-zone__sub{font-size:12px;color:var(--text-muted)}.snap-toggle{display:flex;align-items:flex-start;gap:10px;cursor:pointer}.snap-toggle input{width:18px;height:18px;margin-top:2px;accent-color:var(--accent);flex-shrink:0;cursor:pointer}.snap-toggle__text{display:flex;flex-direction:column;gap:2px;font-size:13px;color:var(--text);line-height:1.4}.snap-toggle__meta{font-size:12px;color:var(--text-muted)}.btn{border:none;border-radius:var(--radius);font-family:var(--font-sans);font-size:13px;font-weight:500;cursor:pointer;transition:background .15s,opacity .15s}.btn:disabled{opacity:.4;cursor:not-allowed}.btn--primary{background:var(--accent);color:var(--accent-text);padding:12px 16px}.btn--primary:hover:not(:disabled){background:var(--accent-hover)}.btn--secondary{background:var(--surface-2);color:var(--text);border:1px solid var(--border);padding:6px 12px;font-size:12px}.btn--secondary:hover:not(:disabled){border-color:var(--text-muted)}.btn--block{width:100%}.btn--sm{padding:5px 10px;font-size:12px}.btn--ghost{background:transparent;color:var(--text-muted);border:1px solid transparent;padding:5px 10px;font-size:12px}.btn--ghost:hover:not(:disabled){color:var(--danger);border-color:var(--border);background:#c530300f}.panel-section__actions{display:flex;flex-wrap:wrap;gap:6px}.splits-panel{flex:1;overflow-y:auto}.splits-list{list-style:none;display:flex;flex-direction:column;gap:8px}.split-item{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:10px;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius)}.split-item__num{font-family:var(--font-mono);font-size:12px;font-weight:500;color:var(--accent);min-width:1.25rem}.split-item__field{display:flex;align-items:center;gap:6px;flex:1;min-width:120px}.split-item__input{width:4.5rem;padding:6px 8px;font-family:var(--font-mono);font-size:13px;background:var(--bg);border:1px solid var(--border);border-radius:4px;color:var(--text)}.split-item__input:focus{border-color:var(--accent)}.split-item__suffix{font-size:12px;color:var(--text-muted);white-space:nowrap}.split-item__badge{font-size:11px;color:var(--snap);padding:2px 6px;border-radius:4px;background:var(--snap-muted)}.split-item__remove{margin-left:auto;padding:4px 8px;font-size:12px;color:var(--text-muted);background:none;border:none;border-radius:4px;cursor:pointer;text-decoration:underline;text-underline-offset:2px}.split-item__remove:hover{color:var(--danger)}.empty-state{font-size:13px;color:var(--text-muted);line-height:1.6}.empty-state strong{color:var(--text);font-weight:500}.slices-summary{padding:16px;border-top:1px solid var(--border)}.slices-summary__note{font-size:12px;color:var(--text-muted);margin-bottom:10px}.slices-summary__list{list-style:none}.slice-row{display:flex;justify-content:space-between;padding:6px 0;font-size:12px;border-bottom:1px solid var(--border)}.slice-row:last-child{border-bottom:none}.slice-row__name{font-family:var(--font-mono);color:var(--text-muted)}.slice-row__size{font-family:var(--font-mono);color:var(--text-faint)}.canvas-area{position:relative;flex:1;min-height:0;min-width:0;display:flex;flex-direction:column;overflow:hidden;background-color:var(--canvas-bg);background-image:radial-gradient(circle at 1px 1px,#d8d8d2 1px,transparent 0);background-size:20px 20px}.canvas-area--drop-active{background-color:color-mix(in srgb,var(--accent-muted) 60%,var(--canvas-bg))}.canvas-area__drop-overlay{position:absolute;top:0;right:0;bottom:0;left:0;z-index:50;display:flex;align-items:center;justify-content:center;pointer-events:none;background:#f6f6f4bf;border:2px dashed var(--accent);border-radius:4px;margin:8px}.canvas-area__drop-overlay-text{font-size:15px;font-weight:500;color:var(--text);padding:12px 20px;background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow-md)}.canvas-area__hint{flex-shrink:0;padding:12px 20px;font-size:13px;color:var(--text-muted);line-height:1.5;background:var(--canvas-bg);border-bottom:1px solid var(--border)}.canvas-area__scroll{flex:1;min-height:0;overflow-x:auto;overflow-y:scroll;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;touch-action:pan-y;padding:24px}.canvas-placeholder{max-width:360px;margin:10vh auto 0;padding:0 16px}.canvas-placeholder__title{font-size:16px;font-weight:500;margin-bottom:8px;color:var(--text)}.canvas-placeholder__drop{font-size:14px;color:var(--accent);font-weight:500;margin-bottom:16px}.canvas-placeholder__steps{padding-left:1.25rem;color:var(--text-muted);font-size:14px;display:flex;flex-direction:column;gap:8px}.image-canvas__workspace{display:flex;justify-content:center;width:max-content;min-width:100%;padding-right:calc(var(--grip-w) + 20px);box-sizing:border-box}.image-canvas__stage{position:relative;display:block;width:fit-content;max-width:min(var(--email-preview-width),calc(100vw - var(--sidebar-w) - 80px));cursor:crosshair;border-radius:4px;background:var(--surface);box-shadow:var(--shadow-md),0 0 0 1px var(--border);overflow:visible}.image-canvas__img{display:block;width:auto;max-width:min(var(--email-preview-width),calc(100vw - var(--sidebar-w) - 80px));height:auto;pointer-events:none;vertical-align:top}.edge-guide{position:absolute;left:0;right:0;height:0;border-top:1px dashed rgba(10,143,173,.45);pointer-events:none;z-index:2;transform:translateY(-50%)}.slice-region{position:absolute;left:0;right:0;pointer-events:none;z-index:1;background:#00000008}.slice-region--alt{background:#0000000f}.split-control{position:absolute;left:0;right:0;z-index:10;transform:translateY(-50%);pointer-events:none}.split-control__cut{position:absolute;left:0;right:0;top:50%;transform:translateY(-50%);display:flex;align-items:center;height:0;pointer-events:none}.split-control__line{flex:1;height:0;border-top:2px dashed var(--cut-line);filter:drop-shadow(0 0 1px var(--cut-shadow)) drop-shadow(0 1px 2px var(--cut-shadow))}.split-control--snapped .split-control__line{border-top-style:solid;border-top-color:var(--snap);filter:drop-shadow(0 0 1px var(--cut-shadow)) drop-shadow(0 0 2px var(--cut-shadow))}.split-control__tick{width:3px;height:14px;background:var(--cut-line);box-shadow:0 0 0 1px var(--cut-shadow);flex-shrink:0;border-radius:1px}.split-control--snapped .split-control__tick{background:var(--snap)}.split-control__grip{position:absolute;left:100%;margin-left:12px;top:50%;transform:translateY(-50%);pointer-events:auto;touch-action:none;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;min-width:var(--grip-w);min-height:var(--hit-min);padding:8px 6px;background:var(--accent);color:var(--accent-text);border:2px solid var(--surface);border-radius:var(--radius);box-shadow:var(--shadow-md);cursor:ns-resize}.split-control__grip:hover{background:var(--accent-hover)}.split-control__grip:active{cursor:grabbing}.split-control--snapped .split-control__grip{background:var(--snap);color:#fff}.split-control__grip-icon{display:flex;opacity:.85}.split-control__grip-label{display:flex;flex-direction:column;align-items:center;line-height:1.2}.split-control__grip-num{font-family:var(--font-mono);font-size:14px;font-weight:600}.split-control__grip-meta{font-family:var(--font-mono);font-size:10px;opacity:.85}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:300;display:flex;align-items:center;justify-content:center;padding:20px;background:#1c1c1873}.modal{width:100%;max-width:420px;max-height:calc(100vh - 40px);overflow:auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-md)}.modal__header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}.modal__title{font-size:16px;font-weight:600}.modal__close{width:32px;height:32px;border:none;background:var(--surface-2);border-radius:var(--radius);font-size:20px;line-height:1;color:var(--text-muted);cursor:pointer}.modal__close:hover:not(:disabled){color:var(--text);background:var(--border)}.modal__body{padding:20px;display:flex;flex-direction:column;gap:20px}.modal__field{display:flex;flex-direction:column;gap:6px}.modal__label{font-size:12px;font-weight:600;color:var(--text)}.modal__input{padding:9px 11px;font-size:14px;font-family:var(--font-mono);border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);color:var(--text)}.modal__input:focus{border-color:var(--accent);outline:none;box-shadow:var(--focus-ring)}.modal__input--indent{margin-left:24px;margin-top:6px;width:calc(100% - 24px)}.modal__hint{font-size:12px;color:var(--text-muted);line-height:1.45}.modal__hint--indent{margin-left:24px}.modal__hint code,.modal__preview-list code{font-family:var(--font-mono);font-size:11px;background:var(--surface-2);padding:1px 5px;border-radius:3px}.modal__fieldset{border:none;display:flex;flex-direction:column;gap:10px}.modal__fieldset:disabled{opacity:.6}.modal__radio{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--text);cursor:pointer}.modal__radio input{margin-top:3px;accent-color:var(--accent);flex-shrink:0}.modal__preview{padding:12px;background:var(--surface-2);border-radius:var(--radius);border:1px solid var(--border)}.modal__preview-list{list-style:none;margin-top:8px;display:flex;flex-direction:column;gap:4px}.modal__slice-list{list-style:none;margin-top:10px;display:flex;flex-direction:column;gap:6px;max-height:200px;overflow-y:auto}.modal__slice-item{display:flex;align-items:flex-start;gap:10px;padding:10px 12px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer}.modal__slice-item:has(input:checked){border-color:var(--snap);background:var(--snap-muted)}.modal__slice-item input{margin-top:3px;accent-color:var(--snap);flex-shrink:0}.modal__slice-item-text{display:flex;flex-direction:column;gap:4px;min-width:0}.modal__slice-item-label{font-size:13px;font-weight:500;display:flex;align-items:center;gap:8px}.modal__slice-item-badge{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--snap);padding:1px 6px;border-radius:4px;background:var(--surface);border:1px solid rgba(10,143,173,.35)}.modal__slice-item-file{font-family:var(--font-mono);font-size:11px;color:var(--text-muted);word-break:break-all}.modal__footer{display:flex;justify-content:flex-end;gap:10px;padding:16px 20px;border-top:1px solid var(--border)}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%) translateY(12px);background:var(--text);color:var(--surface);font-size:13px;font-weight:500;padding:10px 18px;border-radius:var(--radius);opacity:0;pointer-events:none;z-index:200;transition:opacity .25s,transform .25s;box-shadow:var(--shadow-md)}.toast--visible{opacity:1;transform:translate(-50%) translateY(0)}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}@media(max-width:768px){.app-layout{flex-direction:column;overflow:hidden;min-height:0}.canvas-area__scroll{padding:16px}.image-canvas__stage,.image-canvas__img{max-width:min(var(--email-preview-width),calc(100vw - 32px))}.sidebar{width:100%;border-right:none}.panel-section--grow{max-height:200px}.image-canvas__workspace{padding-right:calc(var(--grip-w) + 12px)}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition-duration:.01ms!important}}