:root{--font:"Segoe UI", "IBM Plex Sans", sans-serif;--radius:14px;--control:36px;--ease:cubic-bezier(.22, 1, .36, 1)}*{box-sizing:border-box}html,body,#root{width:100%;height:100%;font-family:var(--font);margin:0;overflow:hidden}button,input{font:inherit}.app{--ink:#17191d;--muted:#6b7280;--panel:#fffffff0;--line:#17191d1a;--accent:#3b5bdb;--accent-soft:#3b5bdb1a;--danger:#e03131;--shadow:0 12px 32px #1018281a;width:100%;height:100%;color:var(--ink);background:#eef1f5;position:relative}.app.ui-dark{--ink:#f1f3f5;--muted:#adb5bd;--panel:#181c24f0;--line:#ffffff1a;--accent:#91a7ff;--accent-soft:#91a7ff24;--danger:#ff8787;--shadow:0 12px 32px #00000059;background:#0f131a}.board{touch-action:none;width:100%;height:100%;display:block;position:absolute;inset:0}.topbar,.toolbar,.stylebar,.settings-panel,.canvas-actions,.modal{background:var(--panel);border:1px solid 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