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0/0.1);--radius:12px}[data-theme=dark]{--bg-primary:#0d0d12;--bg-secondary:#14141b;--bg-tertiary:rgba(255,255,255,0.05);--text-primary:#e6e6f0;--text-secondary:#a0a0b4;--text-tertiary:#6e6e7f;--border-primary:#1e1e26;--border-secondary:#24242f;--accent-primary:#a873ff;--accent-hover:#9660e6;--shadow-sm:0 1px 2px 0 rgb(0 0 0/0.3);--shadow-md:0 4px 6px -1px rgb(0 0 0/0.3),0 2px 4px -2px rgb(0 0 0/0.3);--shadow-lg:0 10px 15px -3px rgb(0 0 0/0.5),0 4px 6px -4px rgb(0 0 0/0.5)}body{background:var(--bg-primary);color:var(--text-primary);caret-color:transparent;font-family:Inter,system-ui,sans-serif;margin:0;padding:0;line-height:1.6;min-height:100vh;display:flex;flex-direction:column;transition:background-color .3s ease,color .3s ease}[contenteditable=true],input,textarea{caret-color:auto}.accent{color:var(--accent-primary)}.page{margin:0 auto;padding:2rem 1.5rem}.header,.page{max-width:1200px;width:100%}.header{padding:2rem 1.5rem 0;display:flex;justify-content:space-between;align-items:center;margin:0 auto 3rem}.header nav a{color:var(--text-secondary);margin-left:1.5rem;text-decoration:none;font-size:.95rem;transition:color .2s;font-weight:500}.header nav a:hover{color:var(--accent-primary)}.logo{font-size:1.4rem;font-weight:700;color:var(--text-primary);display:flex;align-items:center}.hero{margin-bottom:4rem;text-align:left}.hero h1{font-size:2.8rem;margin-bottom:.8rem;font-weight:700;line-height:1.2;color:var(--text-primary)}.hero p{color:var(--text-secondary);font-size:1.1rem;margin-bottom:1.4rem}.hero-buttons .btn{display:inline-block;padding:.7rem 1.3rem;border-radius:8px;margin-right:.8rem;border:1px solid var(--border-secondary);color:var(--text-primary);text-decoration:none;font-weight:500;font-size:.95rem;transition:all .2s}.btn.primary{background:var(--accent-primary);border-color:var(--accent-primary);color:#fff}.btn.primary:hover{background:var(--accent-hover);transform:translateY(-1px)}.btn:not(.primary):hover{border-color:var(--text-secondary);background:var(--bg-tertiary)}.tools-section h2{font-size:2rem;margin-bottom:1.5rem;font-weight:700;color:var(--text-primary)}.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem}.tool-card{background:var(--bg-secondary);border:1px solid var(--border-primary);padding:1.5rem;border-radius:12px;box-shadow:var(--shadow-sm);transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease;cursor:pointer}.tool-card:hover{transform:translateY(-4px);border-color:var(--accent-primary);box-shadow:var(--shadow-md)}.tool-card .icon{width:42px;height:42px;margin-bottom:1rem;color:var(--text-primary)}.tool-card h3{margin:0 0 .4rem;font-size:1.2rem;font-weight:600;color:var(--text-primary)}.tool-card p{color:var(--text-secondary);font-size:.95rem;margin:0;line-height:1.5}a{color:inherit;text-decoration:none}.footer{border-top:1px solid var(--border-primary);padding:1.5rem 1.5rem 1rem;margin-top:auto;background:var(--bg-primary);transition:background-color .3s ease,border-color .3s ease}.footer-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:2rem}.footer-col h4{font-size:.95rem;margin-bottom:.8rem;color:var(--text-primary);font-weight:600}.footer-col a{display:block;margin-bottom:.5rem;color:var(--text-secondary);font-size:.9rem;text-decoration:none;transition:color .2s}.footer-col a:hover{color:var(--accent-primary)}.footer-social{display:flex;gap:.7rem}.footer-social a{opacity:.7;transition:opacity .2s;color:var(--text-secondary)}.footer-social a:hover{opacity:1;color:var(--accent-primary)}.footer-bottom{max-width:1200px;margin:.5rem auto 0;text-align:center;color:var(--text-tertiary);font-size:.85rem;padding-top:.5rem}.upload-container{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:1fr 360px;gap:28px;align-items:start;padding:2rem 1.5rem;width:100%}.upload-card{background:var(--bg-secondary);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-lg);border:1px solid var(--border-primary)}.upload-header h1{margin:0 0 6px;font-size:28px;letter-spacing:-.02em;color:var(--text-primary)}.upload-header p{margin:0;color:var(--text-secondary);font-size:14px}.dropzone{margin-top:20px;border:2px dashed var(--border-primary);background:var(--bg-tertiary);border-radius:12px;padding:28px;display:flex;align-items:center;gap:18px;transition:all .18s ease;cursor:pointer}.dropzone:hover{border-color:rgba(168,115,255,.9);box-shadow:0 8px 30px rgba(168,115,255,.08);transform:translateY(-2px)}.dz-icon{width:76px;height:76px;border-radius:10px;background:linear-gradient(135deg,#a873ff,#5fe3c0);display:grid;place-items:center;color:white;font-weight:700;font-size:28px;box-shadow:0 6px 18px rgba(168,115,255,.18)}.dz-info h3{margin:0 0 6px;font-size:16px;color:var(--text-primary)}.dz-info p{margin:0;color:var(--text-secondary);font-size:13px}.file-list{margin-top:18px;display:grid;gap:10px}.file-row{display:flex;align-items:center;gap:12px;padding:10px;border-radius:10px;background:var(--bg-tertiary);border:1px solid var(--border-primary)}.file-thumb{width:56px;height:56px;border-radius:8px;background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(0,0,0,.06));background-color:var(--bg-secondary);display:grid;place-items:center;font-weight:700;color:var(--text-secondary);font-size:14px}.file-meta{flex:1 1;min-width:0}.file-meta .name{font-size:14px;margin:0 0 4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--text-primary)}.file-meta .size{color:var(--text-tertiary);font-size:12px}.merge-cta{margin-top:18px;display:flex;gap:12px;align-items:center;justify-content:space-between}.merge-cta .note{color:var(--text-tertiary);font-size:13px}.merge-btn{padding:12px 18px;border-radius:12px;border:0;font-weight:700;background:linear-gradient(90deg,#a873ff,#5fe3c0);color:white;box-shadow:0 12px 30px rgba(168,115,255,.12);cursor:pointer;transition:all .2s}.merge-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 16px 40px rgba(168,115,255,.2)}.merge-btn:disabled{opacity:.5;cursor:not-allowed}.side-panel{display:flex;flex-direction:column;gap:18px}.panel{background:var(--bg-secondary);padding:18px;border-radius:12px;border:1px solid var(--border-primary)}.panel h4{margin:0 0 8px;font-size:15px;color:var(--text-primary)}.panel p{margin:0;color:var(--text-secondary);font-size:13px;line-height:1.45}@media (max-width:980px){.upload-container{grid-template-columns:1fr}}.theme-toggle{background:none;border:none;padding:0;cursor:pointer;outline:none;-webkit-tap-highlight-color:transparent}.toggle-track{width:56px;height:30px;background-color:var(--bg-tertiary);border:1px solid var(--border-primary);border-radius:20px;position:relative;transition:background-color .3s ease,border-color .3s ease;display:flex;align-items:center;box-shadow:inset 0 2px 4px rgba(0,0,0,.05)}.toggle-thumb{position:absolute;top:3px;left:3px;width:22px;height:22px;background-color:white;border-radius:50%;box-shadow:0 2px 5px rgba(0,0,0,.15);transition:transform .3s cubic-bezier(.4,0,.2,1),background-color .3s;z-index:2;display:grid;place-items:center}.toggle-icons{position:absolute;width:100%;height:100%;padding:0 7px;box-sizing:border-box;display:flex;justify-content:space-between;align-items:center;pointer-events:none}.theme-toggle.light .toggle-thumb{transform:translateX(26px);background-color:white}.theme-toggle.light .toggle-track{background-color:var(--accent-primary);border-color:var(--accent-primary)}.theme-toggle.light .icon-sun{opacity:1;color:rgba(255,255,255,.9)}.theme-toggle.light .icon-moon{opacity:0}.theme-toggle.dark .toggle-thumb{transform:translateX(0);background-color:white}.theme-toggle.dark .toggle-track{background-color:var(--bg-tertiary);border-color:var(--border-primary)}.theme-toggle.dark .icon-sun{opacity:0}.theme-toggle.dark .icon-moon{opacity:1;color:var(--text-secondary)}