:root{color-scheme:dark;--bg: #0a0a0a;--panel: #141414;--border: #2a2a2a;--text: #f2f2f2;--muted: #8a8a8a;--accent: #ffffff;--accent-dim: #cfcfcf;--focus: #6ea8ff}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:SF Pro Text,Segoe UI,system-ui,sans-serif;background:radial-gradient(circle at top,#161616 0%,var(--bg) 55%);color:var(--text)}.app{max-width:1100px;margin:0 auto;padding:24px 20px 40px}.toolbar{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;padding:14px 16px;background:var(--panel);border:1px solid var(--border);border-radius:12px}.toolbar-group{display:flex;align-items:center;gap:8px}.toolbar-label{font-size:.85rem;color:var(--muted)}.toolbar-select,.toolbar-input,.action-btn{font:inherit;border-radius:8px;border:1px solid var(--border);background:#1b1b1b;color:var(--text)}.toolbar-select,.toolbar-input{padding:8px 10px}.toolbar-input{width:72px}.custom-size-input[hidden]{display:none}.action-btn{padding:8px 12px;cursor:pointer;transition:background .12s ease,border-color .12s ease}.action-btn:hover{background:#242424}.action-btn.primary{background:var(--accent);color:#000;border-color:var(--accent);font-weight:600}.regen-split{position:relative;display:inline-flex}.regen-main{border-top-right-radius:0;border-bottom-right-radius:0;border-right:none}.regen-menu{padding:8px 10px;border-top-left-radius:0;border-bottom-left-radius:0;min-width:36px}.regen-menu[aria-expanded=true]{background:#242424}.regen-dropdown{position:absolute;top:calc(100% + 6px);left:0;z-index:20;min-width:260px;padding:10px;background:#1b1b1b;border:1px solid var(--border);border-radius:10px;box-shadow:0 10px 30px #00000073}.regen-dropdown[hidden]{display:none}.regen-dropdown-title{margin:0 0 8px;font-size:.78rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.regen-option{display:flex;align-items:center;gap:8px;padding:7px 6px;border-radius:6px;font-size:.88rem;cursor:pointer}.regen-option:hover{background:#242424}.regen-option input{accent-color:var(--accent)}.workspace{margin-top:20px;display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:20px}.editor-panel,.preview-panel{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:20px}.editor-panel{display:flex;flex-direction:column;align-items:center;gap:14px}.grid{--cell-size: 56px;display:grid;gap:2px;padding:10px;background:#000;border:1px solid var(--border);border-radius:10px;outline:none}.grid:focus-visible{box-shadow:0 0 0 2px var(--focus)}.cell{width:var(--cell-size);height:var(--cell-size);padding:0;border:1px solid #1f1f1f;background:#000;cursor:crosshair}.cell.on{background:#fff}.cell.focused{outline:2px solid var(--focus);outline-offset:-2px}.cell:hover{border-color:#444}.hint,.preview-meta{margin:0;font-size:.82rem;color:var(--muted);text-align:center}.preview-panel{display:flex;flex-direction:column;align-items:center;gap:10px}.preview-title{margin:0;font-size:.95rem;font-weight:600}.preview-canvas{width:100%;max-width:240px;aspect-ratio:1;image-rendering:pixelated;border:1px solid var(--border);border-radius:8px;background:#000}@media(max-width:900px){.workspace{grid-template-columns:1fr}.preview-panel{order:-1}}