:root{--primary:#0284c7;--primary-hover:#0369a1;--bg-color:#f8fafc;--surface-color:#fff;--text-primary:#0f172a;--text-secondary:#64748b;--border-color:#e2e8f0;--success:#059669;--success-bg:#d1fae5;--error:#dc2626;--error-bg:#fee2e2}body{background-color:var(--bg-color);color:var(--text-primary);justify-content:center;align-items:flex-start;min-height:100vh;margin:0;padding:3rem 1rem;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;display:flex}*{box-sizing:border-box}.app-container{background-color:var(--surface-color);border:1px solid var(--border-color);border-radius:16px;width:100%;max-width:950px;overflow:hidden;box-shadow:0 20px 25px -5px #0000000d,0 8px 10px -6px #00000003}.header{text-align:center;border-bottom:1px solid var(--border-color);padding:2.5rem 2rem 1.5rem}.header-brand{justify-content:center;align-items:center;gap:1.5rem;display:flex}.header img.logo{object-fit:contain;height:52px}.header h1{color:var(--text-primary);letter-spacing:-.025em;margin:0;font-size:1.6rem;font-weight:700}.header p{color:var(--text-secondary);margin-top:.5rem;font-size:.95rem}.content-section{padding:2rem}.main-layout{align-items:stretch;gap:2rem;display:flex}.upload-column{flex-direction:column;flex:1;min-width:0;display:flex}.gallery-column{border-left:1px solid var(--border-color);flex-direction:column;flex:1;min-width:0;padding-left:2rem;display:flex}@media (width<=768px){.main-layout{flex-direction:column}.gallery-column{border-left:none;border-top:1px solid var(--border-color);padding-top:2rem;padding-left:0}}.upload-area{border:2px dashed var(--border-color);text-align:center;cursor:pointer;background-color:#f8fafc;border-radius:12px;flex-direction:column;flex:1;justify-content:center;padding:3rem 2rem;transition:all .3s;display:flex;position:relative}.upload-area.drag-active{border-color:var(--primary);background-color:#f0f9ff}.upload-area input[type=file]{display:none}.upload-icon{width:64px;height:64px;color:var(--primary);background-color:#e0f2fe;border-radius:50%;justify-content:center;align-items:center;margin:0 auto 1.5rem;transition:transform .3s;display:flex}.upload-area:hover .upload-icon{transform:translateY(-5px)}.upload-text{color:var(--text-primary);margin-bottom:.5rem;font-size:1.1rem;font-weight:600}.upload-subtext{color:var(--text-secondary);font-size:.85rem}.file-info{background-color:var(--bg-color);border:1px solid var(--border-color);border-radius:8px;justify-content:space-between;align-items:center;margin-top:1.5rem;padding:1rem;display:flex}.file-details{align-items:center;gap:1rem;display:flex;overflow:hidden}.file-icon{color:var(--primary)}.file-name{white-space:nowrap;text-overflow:ellipsis;max-width:250px;font-weight:600;overflow:hidden}.file-size{color:var(--text-secondary);font-size:.85rem}.remove-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;padding:.5rem;transition:all .2s;display:flex}.remove-btn:hover{background-color:var(--error-bg);color:var(--error)}.actions{gap:1rem;margin-top:1.5rem;display:flex}.btn{cursor:pointer;border:none;border-radius:8px;flex:1;justify-content:center;align-items:center;gap:.5rem;padding:.85rem 1.5rem;font-size:1rem;font-weight:600;transition:all .2s;display:flex}.btn-primary{background-color:var(--primary);color:#fff;box-shadow:0 4px 6px -1px #0284c733}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover);transform:translateY(-1px)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}.status{border-radius:8px;align-items:center;gap:.75rem;margin-top:1.5rem;padding:1rem;font-size:.95rem;font-weight:500;animation:.3s ease-out slideUp;display:flex}.status.success{background-color:var(--success-bg);color:var(--success);border:1px solid #05966933}.status.error{background-color:var(--error-bg);color:var(--error);border:1px solid #dc262633}.files-browser{flex-direction:column;flex:1;display:flex}.files-browser h3{color:var(--text-primary);justify-content:space-between;align-items:center;margin-top:0;margin-bottom:1rem;font-size:1.1rem;display:flex}.refresh-btn{color:var(--primary);cursor:pointer;background:0 0;border:none;border-radius:4px;align-items:center;gap:.25rem;padding:.25rem .5rem;font-size:.85rem;font-weight:500;display:flex}.refresh-btn:hover{background-color:#f0f9ff}.file-list{flex-direction:column;gap:.75rem;max-height:250px;padding-right:.5rem;display:flex;overflow-y:auto}.file-list::-webkit-scrollbar{width:6px}.file-list::-webkit-scrollbar-track{background:#f1f5f9;border-radius:4px}.file-list::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:4px}.file-item{border:1px solid var(--border-color);background-color:#f8fafc;border-radius:8px;align-items:center;padding:.75rem 1rem;transition:background-color .2s;display:flex}.file-item:hover{background-color:#f1f5f9}.file-item-icon{color:var(--text-secondary);margin-right:1rem}.file-item-details{flex:1;overflow:hidden}.file-item-name{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:.95rem;font-weight:500;overflow:hidden}.file-item-meta{color:var(--text-secondary);gap:1rem;margin-top:.2rem;font-size:.8rem;display:flex}.empty-state{text-align:center;color:var(--text-secondary);border:1px dashed var(--border-color);background-color:#f8fafc;border-radius:8px;padding:2rem;font-size:.95rem}@keyframes slideUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.loader{border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:20px;height:20px;animation:1s linear infinite spin}.loader-small{border:2px solid #0284c733;border-top:2px solid var(--primary);border-radius:50%;width:14px;height:14px;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.file-delete-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;margin-left:.5rem;padding:.5rem;transition:all .2s;display:flex}.file-delete-btn:hover{background-color:var(--error-bg);color:var(--error)}.app-footer{text-align:center;color:var(--text-secondary);background-color:var(--surface-color);border-top:1px solid var(--border-color);padding:1.5rem;font-size:.95rem}.app-footer a{color:var(--primary);font-weight:500;text-decoration:none}.app-footer a:hover{color:var(--primary-hover);text-decoration:underline}