:root{--primary:#667eea;--secondary:#764ba2;--danger:#d32f2f;--bg:#f8f9fa;--radius:12px;--shadow:0 10px 30px rgba(0,0,0,.1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;background:linear-gradient(135deg,var(--primary) 0,var(--secondary) 100%);min-height:100vh;display:flex;justify-content:center;align-items:flex-start;padding:10px}.container{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);width:100%;padding:20px;display:flex;flex-direction:column;gap:15px}h1{text-align:center;color:#333;font-size:24px;display:flex;align-items:center;justify-content:center;gap:8px}h1::before{content:'✂️';font-size:28px}.upload-area{border:2px dashed var(--primary);border-radius:var(--radius);padding:30px;text-align:center;transition:all .3s ease;cursor:pointer;position:relative}.upload-area:hover,.upload-area.dragover{border-color:var(--secondary);background:#f6f7ff;transform:scale(1.02)}.upload-icon{font-size:36px;color:var(--primary);margin-bottom:8px}.upload-text{color:#666;font-size:14px}.upload-hint{color:#999;font-size:12px;margin-top:4px}input[type=file]{display:none}.preset{display:flex;flex-direction:column;gap:8px}.preset label{display:flex;align-items:center;gap:8px;padding:8px;border-radius:6px;cursor:pointer;transition:background .2s}.preset label:hover{background:#f0f2ff}input[type=radio]{accent-color:var(--primary)}.custom-offset{display:flex;align-items:center;gap:8px}.custom-offset input{width:80px;padding:6px 8px;border:1px solid #ddd;border-radius:4px;font-size:14px}button{background:var(--primary);color:#fff;border:0;padding:12px;border-radius:var(--radius);font-size:16px;cursor:pointer;transition:background .3s,transform .1s;position:relative;overflow:hidden}button:hover{background:var(--secondary)}button:active{transform:scale(.98)}.history-section{border-top:1px solid #eee;padding-top:15px}.history-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.history-title{font-weight:600;color:#555}.history-btn{background:var(--primary);color:#fff;border:0;padding:4px 8px;border-radius:4px;font-size:12px;cursor:pointer}.history-btn.danger{background:var(--danger)}#historyList{max-height:120px;overflow-y:auto;font-size:13px}.history-item{display:flex;justify-content:space-between;align-items:center;padding:4px 0;border-bottom:1px solid #f2f2f2}.history-path{cursor:pointer;color:#555;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}.history-path:hover{color:var(--primary)}.history-delete{background:var(--danger);color:#fff;border:0;padding:2px 6px;border-radius:3px;font-size:11px;cursor:pointer}@media(max-width:600px){body{padding:0}.container{border-radius:0;height:100vh;width:100%}}