:root{--accent:#7c3aed;--accent-light:#f5f3ff;--accent-muted:#ddd6fe;--accent-dark:#4c1d95;--text-primary:#0a0a0a;--text-secondary:#555;--text-muted:#aaa;--border:#eee}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{color:var(--text-primary);-webkit-font-smoothing:antialiased;background:#fff;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:16px;line-height:1.7}a{color:inherit;text-decoration:none}button{cursor:pointer;background:0 0;border:none;font-family:inherit}input{font-family:inherit}.logo{cursor:pointer;flex-direction:column;align-items:flex-start;gap:0;text-decoration:none;display:inline-flex}.logo-label{color:#4c1d95;letter-spacing:.04em;background:#ddd6fe;border-radius:4px;margin-bottom:2px;padding:1px 7px;font-size:11px;font-weight:500;line-height:1.4}.logo-caret{color:#7c3aed;letter-spacing:-.02em;font-size:48px;font-weight:400;line-height:.9}.landing{max-width:640px;margin:0 auto;padding:1.5rem}.landing-nav{margin-bottom:2rem}.hero{justify-content:space-between;align-items:center;gap:2rem;margin-bottom:2.5rem;display:flex}.hero-text{flex:1}.hero h1{letter-spacing:-.02em;margin-bottom:1rem;font-size:38px;font-weight:500;line-height:1.15}.hero-sub{color:var(--text-secondary);max-width:480px;margin-bottom:0;font-size:16px}.cta-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:11px 22px;font-size:15px;font-weight:500;transition:opacity .15s;display:inline-block}.cta-btn:hover{opacity:.88}.preview-block{background:var(--accent-light);border:1px solid var(--accent-muted);border-radius:12px;margin-bottom:2.5rem;padding:1.5rem;font-size:15px;line-height:2.8}.how-it-works{margin-bottom:2.5rem}.step-list{list-style:none}.step-item{border-bottom:.5px solid var(--border);align-items:flex-start;gap:16px;padding:1rem 0;display:flex}.step-item:first-child{border-top:.5px solid var(--border)}.step-number{color:var(--accent);min-width:18px;font-weight:500;line-height:1.7}.step-text{color:var(--text-primary);font-size:15px}.features{margin-bottom:2.5rem}.feature-list{list-style:none}.feature-item{border-bottom:.5px solid var(--border);align-items:flex-start;gap:14px;padding:1rem 0;display:flex}.feature-item:first-child{border-top:.5px solid var(--border)}.feature-dot{background:var(--accent);border-radius:50%;width:5px;min-width:5px;height:5px;margin-top:8px}.feature-text{color:var(--text-primary);font-size:15px;line-height:1.6}.landing-footer{border-top:.5px solid var(--border);color:var(--text-muted);padding-top:1.5rem;font-size:13px}@media (width<=600px){.hero{flex-direction:column;align-items:flex-start}.hero h1{font-size:28px}.landing{padding:2rem 1.5rem}}.upload-page{max-width:640px;margin:0 auto;padding:2.5rem 1.5rem}.upload-nav{margin-bottom:4rem}.section-label{text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:1.25rem;font-size:11px}.drop-zone{border:1.5px dashed var(--accent-muted);text-align:center;cursor:pointer;border-radius:12px;margin-bottom:1rem;padding:3rem 2rem;transition:border-color .15s,background .15s}.drop-zone:hover,.drop-zone.drag-over{border-color:var(--accent);background:var(--accent-light)}.drop-zone-icon{margin:0 auto 1rem;display:block}.drop-zone h3{margin-bottom:.25rem;font-size:16px;font-weight:500}.drop-zone p{color:var(--text-secondary);font-size:14px}.drop-zone p span{color:var(--accent);text-decoration:underline}.drop-zone-hint{color:#ccc;margin-top:8px;font-size:12px}.file-chip{background:var(--accent-light);border:1px solid var(--accent-muted);border-radius:8px;align-items:center;gap:10px;margin-bottom:2rem;padding:10px 14px;font-size:14px;display:flex}.file-chip-name{text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.file-chip-size{color:var(--text-muted);white-space:nowrap;font-size:13px}.threshold-section{margin-bottom:2rem}.threshold-desc{color:var(--text-muted);margin-bottom:1rem;font-size:13px;line-height:1.6}.slider-row{align-items:center;gap:12px;display:flex}.slider-label{color:#bbb;white-space:nowrap;font-size:12px}.slider-row input[type=range]{accent-color:var(--accent);cursor:pointer;flex:1}.threshold-value{color:var(--accent);text-align:center;margin-top:.5rem;font-size:13px;font-weight:500}.submit-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;width:100%;padding:13px;font-size:15px;font-weight:500;transition:opacity .15s}.submit-btn:hover{opacity:.88}.processing{flex-direction:column;align-items:center;padding-top:2rem;display:flex}.spinner{border:2.5px solid var(--accent-muted);border-top-color:var(--accent);border-radius:50%;width:32px;height:32px;margin:0 auto 1.5rem;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.processing h3{margin-bottom:.4rem;font-size:18px;font-weight:500}.processing-sub{color:var(--text-muted);margin-bottom:2rem;font-size:14px}.done-state{flex-direction:column;gap:.5rem;margin-top:1rem;display:flex}.done-title{margin-bottom:.25rem;font-size:18px;font-weight:500}.done-sub{color:var(--text-muted);margin-bottom:1.5rem;font-size:14px}.reset-btn{color:var(--accent);border:.5px solid var(--accent-muted);background:0 0}.reset-btn:hover{opacity:1;background:var(--accent-light)}.error-state{flex-direction:column;gap:.5rem;margin-top:1rem;display:flex}.error-title{margin-bottom:.25rem;font-size:18px;font-weight:500}.error-msg{color:#e53e3e;margin-bottom:1.5rem;font-size:14px}.coming-soon{text-align:center;padding:4rem 1rem}.coming-soon h3{margin-bottom:.5rem;font-size:20px;font-weight:500}.coming-soon p{color:var(--text-muted);font-size:14px}@media (width<=600px){.upload-page{padding:2rem 1.5rem}}