:root{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;line-height:1.6;font-weight:400;color-scheme:light;color:#0f172a;background-color:#f8fafc;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#6366f1;text-decoration:inherit}a:hover{color:#4f46e5}body{margin:0;min-width:320px;min-height:100vh}#root{width:100%}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;cursor:pointer;transition:all .2s}button:focus-visible{outline:2px solid #6366f1;outline-offset:2px}:root{--primary-color: #6366f1;--primary-hover: #4f46e5;--primary-light: #eef2ff;--danger-color: #ef4444;--danger-hover: #dc2626;--success-color: #10b981;--success-hover: #059669;--border-color: #e5e7eb;--bg-page: #f8fafc;--bg-card: #ffffff;--bg-secondary: #f1f5f9;--text-primary: #0f172a;--text-secondary: #64748b;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow: 0 1px 3px rgba(0, 0, 0, .1), 0 1px 2px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05)}*{box-sizing:border-box}body{margin:0;padding:0;background-color:var(--bg-page);color:var(--text-primary)}.app{min-height:100vh;padding:2rem;display:flex;flex-direction:column;align-items:center}.app>*{width:100%;max-width:1200px}.app-header{text-align:center;margin-bottom:3rem}.app-header h1{font-size:3rem;font-weight:800;margin-bottom:.75rem;color:var(--text-primary);background:linear-gradient(135deg,var(--primary-color) 0%,var(--success-color) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.app-header p{color:var(--text-secondary);font-size:1.125rem;font-weight:500}.app-main{display:grid;gap:2rem}.upload-section{display:flex;flex-direction:column;gap:1.5rem}.uploader{border:2px dashed var(--border-color);border-radius:16px;padding:3rem 2rem;text-align:center;cursor:pointer;transition:all .2s;background:var(--bg-card);box-shadow:var(--shadow-sm)}.uploader:hover:not(.disabled){border-color:var(--primary-color);background:var(--primary-light);box-shadow:var(--shadow)}.uploader.disabled{cursor:not-allowed;opacity:.6}.uploader-content svg{color:var(--text-secondary);margin-bottom:1rem}.uploader-title{font-size:1.25rem;font-weight:600;color:var(--text-primary);margin-bottom:.5rem}.uploader-subtitle{color:var(--text-secondary);font-size:.9rem}.error-message{display:flex;align-items:center;gap:.75rem;padding:1rem;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;color:var(--danger-color)}.error-message svg{flex-shrink:0}.image-preview-container{background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;padding:1.5rem;box-shadow:var(--shadow-sm)}.preview-header{margin-bottom:1rem}.preview-header h3{font-size:1.25rem;color:var(--text-primary);margin:0}.image-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:1rem}.image-item{position:relative;aspect-ratio:1;border-radius:8px;overflow:hidden;border:1px solid var(--border-color);background:var(--bg-secondary)}.image-item img{width:100%;height:100%;object-fit:cover}.remove-btn{position:absolute;top:.5rem;right:.5rem;width:28px;height:28px;border:none;border-radius:50%;background:#0009;color:#fff;font-size:1.5rem;line-height:1;cursor:pointer;transition:background .2s;display:flex;align-items:center;justify-content:center}.remove-btn:hover{background:var(--danger-color)}.image-info{position:absolute;bottom:0;left:0;right:0;padding:.25rem .5rem;background:#0009;color:#fff;font-size:.75rem;text-align:center}.action-buttons{display:flex;gap:1rem;justify-content:center}.action-buttons button{padding:.75rem 2rem;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s}.clear-btn{background:#fff;border:1px solid var(--border-color);color:var(--text-primary)}.clear-btn:hover:not(:disabled){background:var(--bg-secondary)}.generate-btn{background:var(--primary-color);color:#fff}.generate-btn:hover:not(:disabled){background:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow)}.action-buttons button:disabled{opacity:.6;cursor:not-allowed}.settings-panel{background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;padding:1.5rem;box-shadow:var(--shadow-sm)}.settings-panel h3{margin-top:0;margin-bottom:1.5rem;color:var(--text-primary)}.setting-group{margin-bottom:1.5rem}.setting-group:last-child{margin-bottom:0}.setting-group label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text-primary)}.setting-group select,.setting-group input[type=number],.setting-group input[type=text]{width:100%;padding:.5rem;border:1px solid var(--border-color);border-radius:6px;font-size:1rem}.setting-group input[type=range]{width:100%}.color-input-group{display:flex;gap:.5rem}.color-input-group input[type=color]{width:60px;height:40px;border:1px solid var(--border-color);border-radius:6px;cursor:pointer}.color-input-group input[type=text]{flex:1}.collage-result{background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;padding:1.5rem;box-shadow:var(--shadow-sm)}.result-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.result-header h3{margin:0;color:var(--text-primary)}.download-btn{display:flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;background:var(--success-color);color:#fff;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:background .2s}.download-btn:hover{background:var(--success-hover);transform:translateY(-1px);box-shadow:var(--shadow)}.result-info{display:flex;gap:1.5rem;margin-bottom:1rem;padding:.75rem;background:var(--bg-secondary);border-radius:6px;font-size:.9rem;color:var(--text-secondary)}.result-preview{border-radius:8px;overflow:hidden;border:1px solid var(--border-color);max-height:600px;overflow-y:auto}.result-preview img{width:100%;height:auto;display:block}.app-footer{text-align:center;margin-top:3rem;padding-top:2rem;border-top:1px solid var(--border-color);color:var(--text-secondary);font-size:.9rem}@media(min-width:768px){.app-main{grid-template-columns:1fr;align-items:start}.upload-section{grid-column:1}.settings-section{grid-column:1;max-width:600px;margin:0 auto;width:100%}.result-section{grid-column:1}}@media(max-width:767px){.app{padding:1rem}.app-header h1{font-size:2rem}.result-header{flex-direction:column;gap:1rem;align-items:stretch}.image-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}}