body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}#root{min-height:100vh}:root{--brand:#e63946;--brand-dark:#c0333f;--brand-light:#fff0f0;--brand-border:#ffc5c5;--bg:#f7f7f8;--surface:#fff;--border:#e5e5e5;--border-soft:#f0f0f0;--text-primary:#1a1a1a;--text-secondary:#555;--text-muted:#999;--text-faint:#bbb;--info-bg:#f0f7ff;--info-border:#c5d5fc;--info-text:#1a73e8;--warn-bg:#fff8e1;--warn-border:#ffe082;--warn-text:#795548;--error-bg:#fff0f0;--error-border:#ffc5c5;--error-text:#c0392b;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--shadow-sm:0 1px 4px #0000000f;--shadow-md:0 4px 16px #0000001a;--shadow-lg:0 8px 32px #0000001f;--max-width:1300px;--nav-height:58px;--font:system-ui, -apple-system, "Segoe UI", Roboto, sans-serif}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px}body{font-family:var(--font);background:var(--bg);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:inherit}button,input,select,textarea{font-family:var(--font)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#ddd;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#bbb}.page-wrapper{background:var(--bg);min-height:100vh}.content-area{max-width:var(--max-width);margin:0 auto;padding:0 20px}.tool-hero{text-align:center;padding:56px 20px 32px}.tool-hero h1{color:var(--text-primary);margin-bottom:10px;font-size:2rem;font-weight:700}.tool-hero p{color:var(--text-secondary);font-size:1rem}.drop-zone{border:2px dashed var(--border);border-radius:var(--radius-lg);background:var(--surface);text-align:center;cursor:pointer;padding:64px 32px;transition:border-color .2s,background .2s}.drop-zone:hover,.drop-zone.active{border-color:var(--brand);background:var(--brand-light)}.btn-primary{background:var(--brand);color:#fff;border-radius:var(--radius-md);cursor:pointer;border:none;justify-content:center;align-items:center;gap:8px;padding:16px 40px;font-size:1rem;font-weight:700;text-decoration:none;transition:background .2s;display:inline-flex}.btn-primary:hover{background:var(--brand-dark)}.btn-primary:disabled{cursor:not-allowed;background:#f0c0c3}.btn-ghost{color:var(--brand);cursor:pointer;background:0 0;border:none;padding:0;font-size:14px;text-decoration:underline}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}.info-box{background:var(--info-bg);border:1px solid var(--info-border);border-radius:var(--radius-sm);color:var(--info-text);gap:8px;padding:12px 14px;font-size:13px;display:flex}.warn-box{background:var(--warn-bg);border:1px solid var(--warn-border);border-radius:var(--radius-sm);color:var(--warn-text);padding:12px 16px;font-size:14px}.error-box{background:var(--error-bg);border:1px solid var(--error-border);border-radius:var(--radius-sm);color:var(--error-text);justify-content:space-between;align-items:center;padding:12px 16px;font-size:14px;display:flex}.progress-track{background:#f0f0f0;border-radius:100px;max-width:400px;height:8px;margin:0 auto;overflow:hidden}.progress-fill{background:var(--brand);border-radius:100px;height:100%;transition:width .35s}.continue-grid{grid-template-columns:repeat(3,1fr);gap:8px;display:grid}.side-panel{background:var(--surface);border-left:1px solid var(--border);flex-direction:column;flex-shrink:0;width:300px;display:flex}.side-panel-header{border-bottom:1px solid var(--border-soft);padding:20px 24px}.side-panel-body{flex:1;padding:20px 24px;overflow-y:auto}.side-panel-footer{border-top:1px solid var(--border-soft);padding:20px 24px}.processing-screen{max-width:800px;margin:40px auto;padding:0 20px}.processing-card{background:var(--surface);border-radius:var(--radius-lg);text-align:center;border:1px solid var(--border);padding:48px 32px}.success-header{background:var(--brand);text-align:center;color:#fff;padding:36px 32px}.site-footer{background:var(--surface);border-top:1px solid var(--border);text-align:center;color:var(--text-faint);padding:24px 20px;font-size:13px}.site-footer a{color:var(--text-faint);text-decoration:none}.site-footer a:hover{color:var(--text-secondary)}.seo-section{border-top:1px solid var(--border);margin-top:48px;padding-top:36px}.how-to-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:20px;margin-top:16px;display:grid}.how-to-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px}.step-badge{background:var(--brand-light);width:32px;height:32px;color:var(--brand);border-radius:50%;justify-content:center;align-items:center;margin-bottom:12px;font-size:15px;font-weight:700;display:flex}@media (width<=900px){.continue-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=600px){.tool-hero h1{font-size:1.5rem}.tool-hero{padding:36px 16px 24px}.continue-grid{grid-template-columns:1fr}.side-panel{border-left:none;border-top:1px solid var(--border);width:100%}}