:root{--primary-bg: #ffffff;--secondary-bg: #f8fafc;--text-primary: #0f172a;--text-secondary: #64748b;--border-color: #e2e8f0;--accent-color: #000000;--font-main: "Inter", sans-serif;--font-mono: "Outfit", sans-serif}body{margin:0;padding:0;font-family:var(--font-main);background-color:var(--secondary-bg);color:var(--text-primary);overflow:hidden}#app{display:flex;height:100vh;width:100vw}#ui-container{width:320px;background-color:var(--primary-bg);border-right:1px solid var(--border-color);display:flex;flex-direction:column;z-index:10;box-shadow:4px 0 24px #00000005}header{padding:24px;border-bottom:1px solid var(--border-color)}.logo-container{margin-bottom:0}.main-logo{max-width:180px;height:auto;display:block}h1{font-family:var(--font-mono);font-weight:700;font-size:1.5rem;margin:0;letter-spacing:-.02em}.subtitle{font-size:.875rem;color:var(--text-secondary);margin-top:4px}#controls{flex:1;padding:24px;overflow-y:auto}.control-group{margin-bottom:32px}.control-group h3{font-family:var(--font-mono);font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-secondary);margin-bottom:16px;font-weight:700}input[type=file]{display:none}.custom-file-upload{display:inline-block;background-color:#000;color:#fff;padding:10px 16px;cursor:pointer;border-radius:4px;font-family:var(--font-main);font-size:.9rem;font-weight:500;width:100%;box-sizing:border-box;text-align:center;transition:background-color .2s}.custom-file-upload:hover{background-color:#333}.toggle-item{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;font-family:var(--font-mono);font-size:.9rem}.switch{position:relative;display:inline-block;width:44px;height:24px}.switch input{opacity:0;width:0;height:0}.slider{position:absolute;cursor:pointer;inset:0;background-color:#e2e8f0;transition:.3s;border-radius:24px}.slider:before{position:absolute;content:"";height:20px;width:20px;left:2px;bottom:2px;background-color:#fff;transition:.3s;border-radius:50%;box-shadow:0 2px 4px #0000001a}input:checked+.slider{background-color:#000}input:checked+.slider:before{transform:translate(20px)}#canvas-container{flex:1;background-color:#f1f5f9;position:relative}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#94a3b8}