:root{--md-primary: #6750A4;--md-primary-container: #EADDFF;--md-secondary: #625B71;--md-surface: #FFFBFE;--md-surface-variant: #E7E0EC;--md-background: #FFFBFE;--md-on-primary: #FFFFFF;--md-on-surface: #1C1B1F;--md-outline: #79747E;--md-error: #B3261E;--md-on-error: #FFFFFF;--shadow-1: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.24);--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--transition: .2s ease}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Roboto,sans-serif;font-size:14px;color:var(--md-on-surface);background:var(--md-background)}.app{display:flex;min-height:100vh}.sidebar{width:280px;min-width:280px;background:var(--md-surface);border-right:1px solid var(--md-surface-variant);display:flex;flex-direction:column;height:100vh;position:sticky;top:0}.sidebar-header{padding:16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--md-surface-variant)}.sidebar-title{font-size:20px;font-weight:500;color:var(--md-on-surface)}.sidebar-actions{display:flex;gap:8px}.icon-btn{width:36px;height:36px;border:none;border-radius:var(--radius-md);background:transparent;color:var(--md-primary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background var(--transition),color var(--transition)}.icon-btn:hover{background:var(--md-primary-container)}.key-list{flex:1;overflow-y:auto;padding:8px 0}.key-item{padding:12px 16px;cursor:pointer;display:flex;align-items:center;gap:12px;transition:background var(--transition)}.key-item:hover{background:var(--md-surface-variant)}.key-item.selected{background:var(--md-primary-container)}.key-item-content{flex:1;overflow:hidden}.key-item-name{font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.key-item-preview{font-size:12px;color:var(--md-outline);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.detail-panel{flex:1;padding:24px;overflow-y:auto}.detail-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--md-outline);text-align:center}.detail-empty-icon{font-size:64px;margin-bottom:16px;opacity:.5}.detail-empty-text{font-size:16px}.detail-form{max-width:600px}.detail-title{font-size:24px;font-weight:500;margin-bottom:24px}.form-group{margin-bottom:16px}.form-label{display:block;font-size:12px;font-weight:500;color:var(--md-outline);margin-bottom:4px;text-transform:uppercase;letter-spacing:.5px}.form-input{width:100%;padding:12px 16px;font-size:14px;font-family:inherit;border:1px solid var(--md-outline);border-radius:var(--radius-sm);background:var(--md-surface);color:var(--md-on-surface);transition:border-color var(--transition),box-shadow var(--transition)}.form-input:focus{outline:none;border-color:var(--md-primary);box-shadow:0 0 0 2px var(--md-primary-container)}.form-input:disabled{background:var(--md-surface-variant);color:var(--md-outline)}.key-display{display:flex;align-items:center;gap:8px;padding:12px 16px;border:1px solid var(--md-outline);border-radius:var(--radius-sm);background:var(--md-surface)}.key-display-value{flex:1;font-family:monospace;font-size:14px;word-break:break-all}.key-display-actions{display:flex;gap:4px}.btn{padding:10px 24px;font-size:14px;font-weight:500;font-family:inherit;border:none;border-radius:var(--radius-md);cursor:pointer;transition:background var(--transition),box-shadow var(--transition)}.btn-primary{background:var(--md-primary);color:var(--md-on-primary)}.btn-primary:hover{box-shadow:var(--shadow-1)}.btn-secondary{background:var(--md-surface-variant);color:var(--md-on-surface)}.btn-secondary:hover{background:var(--md-surface-variant);filter:brightness(.95)}.btn-error{background:var(--md-error);color:var(--md-on-error)}.btn-error:hover{filter:brightness(1.1)}.form-actions{display:flex;gap:8px;margin-top:24px}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background:var(--md-surface);border-radius:var(--radius-lg);width:90%;max-width:500px;max-height:90vh;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 4px 24px #0003}.modal-header{padding:16px 24px;border-bottom:1px solid var(--md-surface-variant)}.modal-title{font-size:20px;font-weight:500}.modal-body{padding:24px;overflow-y:auto}.modal-footer{padding:16px 24px;border-top:1px solid var(--md-surface-variant);display:flex;justify-content:flex-end;gap:8px}.file-drop{border:2px dashed var(--md-outline);border-radius:var(--radius-md);padding:32px;text-align:center;cursor:pointer;transition:border-color var(--transition),background var(--transition)}.file-drop:hover{border-color:var(--md-primary);background:var(--md-primary-container)}.file-drop-text{color:var(--md-outline)}.import-preview{margin-top:16px}.import-preview-item{padding:8px 12px;background:var(--md-surface-variant);border-radius:var(--radius-sm);margin-bottom:8px;font-size:12px}.confirm-text{margin-bottom:16px;line-height:1.5}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);padding:12px 24px;background:var(--md-on-surface);color:var(--md-surface);border-radius:var(--radius-md);box-shadow:var(--shadow-1);animation:toast-in .3s ease}@keyframes toast-in{0%{opacity:0;transform:translate(-50%) translateY(20px)}to{opacity:1;transform:translate(-50%) translateY(0)}}@media (max-width: 768px){.sidebar{width:100%;position:fixed;left:0;top:0;bottom:0;transform:translate(-100%);z-index:100;transition:transform var(--transition)}.sidebar.open{transform:translate(0)}}