:root{--primary-color: #6366f1;--primary-dark: #4f46e5;--primary-light: #818cf8;--secondary-color: #8b5cf6;--success-color: #10b981;--background: #0f172a;--surface: #1e293b;--surface-hover: #334155;--border: #334155;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--shadow: rgba(0, 0, 0, .3);--shadow-lg: rgba(0, 0, 0, .5)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:var(--background);color:var(--text-primary);height:100vh;overflow:hidden;line-height:1.6}.app-layout{display:flex;height:100vh;overflow:hidden}.sidebar{width:320px;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow-y:auto}.sidebar-header{padding:1.5rem;border-bottom:1px solid var(--border)}.sidebar-title{font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,var(--primary-light) 0%,var(--secondary-color) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:flex;align-items:center;gap:.75rem;margin-bottom:.25rem}.logo-icon{width:1.75rem;height:1.75rem;stroke-width:2;flex-shrink:0}.sidebar-subtitle{color:var(--text-secondary);font-size:.9rem}.sidebar-content{flex:1;padding:1.5rem;overflow-y:auto}.sidebar-footer{padding:1rem 1.5rem;border-top:1px solid var(--border);font-size:.75rem;color:var(--text-muted);text-align:center}.upload-compact{margin-bottom:1.5rem}.btn-upload-compact{display:none;width:100%;background:linear-gradient(135deg,var(--primary-color) 0%,var(--secondary-color) 100%);color:#fff;border:none;padding:.875rem 1.5rem;border-radius:.75rem;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #6366f14d;align-items:center;justify-content:center;gap:.5rem}.btn-upload-compact:hover{transform:translateY(-2px);box-shadow:0 6px 20px #6366f166}.upload-icon-small{width:1.25rem;height:1.25rem;stroke-width:2}.sidebar-controls{animation:fadeIn .3s ease}.control-section{margin-bottom:1.5rem}.control-label{display:block;font-size:.9rem;font-weight:600;margin-bottom:.75rem;color:var(--text-secondary)}.format-buttons-compact{display:grid;grid-template-columns:repeat(2,1fr);gap:.5rem}.format-btn-compact{background:rgba(99,102,241,.1);border:2px solid transparent;color:var(--text-primary);padding:.75rem;border-radius:.5rem;font-size:.875rem;font-weight:600;cursor:pointer;transition:all .2s ease}.format-btn-compact:hover{background:rgba(99,102,241,.2)}.format-btn-compact.active{background:linear-gradient(135deg,var(--primary-color) 0%,var(--secondary-color) 100%);border-color:var(--primary-light);box-shadow:0 2px 10px #6366f14d}.quality-slider-compact{width:100%;height:6px;border-radius:3px;background:rgba(99,102,241,.2);outline:none;-webkit-appearance:none;cursor:pointer}.quality-slider-compact::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:linear-gradient(135deg,var(--primary-color) 0%,var(--secondary-color) 100%);cursor:pointer;box-shadow:0 2px 8px #6366f166;transition:transform .2s ease}.quality-slider-compact::-webkit-slider-thumb:hover{transform:scale(1.2)}.quality-slider-compact::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:linear-gradient(135deg,var(--primary-color) 0%,var(--secondary-color) 100%);cursor:pointer;border:none;box-shadow:0 2px 8px #6366f166}.bg-buttons-compact{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap}.bg-btn-compact{background:rgba(99,102,241,.1);border:2px solid transparent;padding:.5rem;border-radius:.5rem;cursor:pointer;transition:all .2s ease}.bg-btn-compact:hover{background:rgba(99,102,241,.2);transform:scale(1.05)}.bg-btn-compact.active{border-color:var(--primary-color);box-shadow:0 2px 10px #6366f14d}.bg-preview-compact{width:32px;height:32px;border-radius:.375rem;border:2px solid var(--border)}.transparent-bg{background:linear-gradient(45deg,#64748b 25%,transparent 25%),linear-gradient(-45deg,#64748b 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#64748b 75%),linear-gradient(-45deg,transparent 75%,#64748b 75%);background-size:8px 8px;background-position:0 0,0 4px,4px -4px,-4px 0px}.custom-color-compact{width:40px;height:40px;border-radius:.5rem;border:2px solid var(--border);cursor:pointer;background:var(--surface);transition:all .2s ease}.custom-color-compact:hover{transform:scale(1.05);border-color:var(--primary-color)}.bg-note-compact{margin-top:.75rem;padding:.75rem;background:rgba(99,102,241,.1);border-radius:.5rem;font-size:.8rem;color:var(--text-secondary);border-left:3px solid var(--primary-color)}.bg-note-compact.warning{background:rgba(251,191,36,.1);border-left-color:#fbbf24;color:#fbbf24}.btn-download-compact,.btn-reset-compact{width:100%;padding:.875rem;border:none;border-radius:.5rem;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;gap:.5rem;margin-bottom:.5rem}.btn-download-compact{background:var(--success-color);color:#fff;box-shadow:0 2px 10px #10b9814d}.btn-download-compact:hover{transform:translateY(-1px);box-shadow:0 4px 15px #10b98166}.btn-reset-compact{background:transparent;border:2px solid var(--border);color:var(--text-secondary)}.btn-reset-compact:hover{border-color:var(--primary-color);color:var(--primary-color);background:rgba(99,102,241,.05)}.btn-icon-small{width:1.125rem;height:1.125rem;stroke-width:2}.main-content{flex:1;display:flex;align-items:center;justify-content:center;padding:2rem;overflow:hidden;position:relative}.drop-zone-main{width:100%;height:100%;border:3px dashed var(--border);border-radius:1.5rem;display:flex;align-items:center;justify-content:center;transition:all .3s ease;cursor:pointer;background:var(--surface)}.drop-zone-main:hover,.drop-zone-main.drag-over{border-color:var(--primary-color);background:rgba(99,102,241,.05);transform:scale(.98)}.drop-zone-content{text-align:center;padding:2rem}.upload-icon-large{width:5rem;height:5rem;stroke-width:2;color:var(--primary-color);margin-bottom:1.5rem}.drop-text-main{font-size:1.75rem;font-weight:600;margin-bottom:.5rem}.drop-subtext-main{color:var(--text-muted);font-size:1rem}.preview-grid{width:100%;height:100%;display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}.preview-item{background:var(--surface);border-radius:1rem;overflow:hidden;display:flex;flex-direction:column}.preview-header{padding:1rem 1.5rem;background:rgba(0,0,0,.2);display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border)}.preview-label{font-weight:600;font-size:1rem;color:var(--text-primary)}.file-info{font-size:.75rem;color:var(--text-secondary)}.preview-image-wrapper{flex:1;display:flex;align-items:center;justify-content:center;padding:1.5rem;background:rgba(0,0,0,.2);overflow:hidden}.preview-image-wrapper img{max-width:100%;max-height:100%;object-fit:contain;border-radius:.5rem}.loader{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;background:var(--surface);padding:2rem 3rem;border-radius:1rem;box-shadow:0 10px 40px var(--shadow-lg);z-index:1000}.spinner{width:3rem;height:3rem;margin:0 auto 1rem;border:4px solid rgba(99,102,241,.1);border-top-color:var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 1024px){.sidebar{width:280px}}@media (max-width: 768px){body{overflow:auto;height:auto}.app-layout{flex-direction:column;height:auto;min-height:100vh;overflow:visible}.sidebar{width:100%;max-height:none;height:auto;border-right:none;border-top:1px solid var(--border);border-bottom:none;display:flex;flex-direction:column;order:2;overflow-y:visible}.main-content{padding:1rem;flex:1;min-height:60vh;order:1;overflow:visible}.sidebar-title{font-size:1.1rem}.logo-icon{width:1.25rem;height:1.25rem}.sidebar-subtitle{font-size:.75rem}.sidebar-footer a{display:none}.sidebar-content{display:flex;flex-direction:column;overflow-y:visible}.upload-compact{order:1;margin-bottom:1rem}.sidebar-controls{order:2}.format-buttons-compact{grid-template-columns:repeat(3,1fr)}.preview-header{padding:.75rem 1rem}.preview-label{font-size:.875rem}.file-info{font-size:.7rem}.drop-zone-main{min-height:50vh}.preview-grid{height:auto;min-height:50vh}}.format-btn-compact[style*="display: none"],.bg-btn-compact[style*="display: none"]{display:none!important}