:root{--gradient-start:#667eea;--gradient-end:#764ba2;--gradient:linear-gradient(135deg, var(--gradient-start), var(--gradient-end));--surface:#fff;--surface-2:#f8f9ff;--surface-glass:#ffffffbf;--surface-hover:#ffffffeb;--surface-deep:#ffffff80;--bg-page:#f0f2fd;--bg-alt:#e8ecf7;--border:#ffffffb3;--border-subtle:#667eea26;--border-card:#ffffffd9;--primary:#667eea;--primary-dark:#5a6fd6;--primary-hover:#5860d0;--primary-glow:#667eea4d;--primary-light:#667eea14;--primary-ring:#667eea33;--success:#10b981;--success-hover:#059669;--success-light:#10b9811a;--success-ring:#10b98133;--warning:#f59e0b;--warning-light:#f59e0b1a;--error:#f43f5e;--error-light:#f43f5e1a;--error-ring:#f43f5e33;--text:#1a1d35;--text-secondary:#5c618b;--text-light:#8890b5;--text-on-primary:#fff;--radius-xs:6px;--radius-sm:10px;--radius-md:14px;--radius-lg:18px;--radius-xl:24px;--radius-pill:999px;--shadow-xs:0 1px 4px #0000000f;--shadow-sm:0 2px 8px #667eea14, 0 1px 2px #0000000a;--shadow-md:0 4px 16px #667eea1f, 0 1px 4px #0000000f;--shadow-lg:0 8px 32px #667eea29, 0 2px 8px #0000000f;--shadow-btn:0 4px 14px #667eea61;--shadow-hero:0 8px 40px #667eea47;--nav-height:64px;--sidebar-width:260px;--content-max:640px;--transition-fast:.15s ease;--transition-base:.22s cubic-bezier(.4, 0, .2, 1);--transition-spring:.3s cubic-bezier(.34, 1.56, .64, 1)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg-page);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-image:radial-gradient(at 15% 5%,#764ba21a 0%,#0000 50%),radial-gradient(at 85% 95%,#667eea1a 0%,#0000 50%);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6}#root{flex-direction:column;min-height:100vh;display:flex}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 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var(--border-subtle);border-radius:var(--radius-lg);text-align:center;cursor:pointer;transition:all var(--transition-base);background:var(--surface-2);flex-direction:column;align-items:center;gap:8px;margin:16px 20px;padding:40px 24px;display:flex;position:relative}.dropzone:hover,.dropzone--over{border-color:var(--primary);box-shadow:0 4px 16px var(--primary-ring);background:#667eea0a;transform:translateY(-1px)}.dropzone--over{box-shadow:0 0 0 4px var(--primary-glow), 0 4px 16px var(--primary-ring)}.dropzone--disabled{opacity:.6;cursor:not-allowed}.dropzone-icon-wrap{margin-bottom:4px}.dropzone-icon{background:var(--primary-light);border-radius:var(--radius-md);width:60px;height:60px;color:var(--primary);transition:all var(--transition-spring);justify-content:center;align-items:center;display:flex}.dropzone:hover .dropzone-icon,.dropzone--over 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