:root{--primary-color: #646cff;--primary-hover: #535bf2;--bg-color: #f0f2f5;--panel-bg: #ffffff;--text-color: #213547;--border-color: #dfe1e5;--shadow-sm: 0 1px 3px rgba(0,0,0,.1);--shadow-md: 0 4px 6px rgba(0,0,0,.1);--radius: 8px}body{margin:0;font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color);-webkit-font-smoothing:antialiased}*{box-sizing:border-box}h1,h2,h3{margin:0}button{border-radius:var(--radius);border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:var(--primary-color);color:#fff;cursor:pointer;transition:border-color .25s,background-color .25s}button:hover{background-color:var(--primary-hover)}button.secondary{background-color:transparent;border-color:var(--primary-color);color:var(--primary-color)}button.secondary:hover{background-color:#646cff1a}button:disabled{background-color:#ccc;cursor:not-allowed;border-color:transparent;color:#666}input[type=text],input[type=number],input[type=file]{padding:.5em;border:1px solid var(--border-color);border-radius:var(--radius);font-size:1rem;width:100%}label{display:block;margin-bottom:.5rem;font-weight:500;font-size:.9rem}.app-container{display:flex;height:100vh;overflow:hidden}.config-panel{width:350px;background:var(--panel-bg);padding:2rem;border-right:1px solid var(--border-color);overflow-y:auto;display:flex;flex-direction:column;gap:1.5rem;box-shadow:2px 0 5px #0000000d;flex-shrink:0}.preview-area{flex:1;padding:2rem;overflow-y:auto;display:flex;flex-direction:column;align-items:center;gap:2rem}.app-header{margin-bottom:1rem}.title{font-size:1.5rem;font-weight:700;color:var(--primary-color)}.form-group{margin-bottom:1rem}.file-preview-list{display:flex;flex-wrap:wrap;gap:5px;margin-top:5px}.file-preview-thumb{width:40px;height:40px;object-fit:cover;border-radius:4px;border:1px solid #eee}.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:2rem;width:100%;max-width:1200px}.action-bar{display:flex;gap:1rem;background:#fff;padding:1rem;border-radius:8px;box-shadow:var(--shadow-sm);position:sticky;top:0;z-index:10}