*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #4f46e5;--primary-hover: #4338ca;--danger: #ef4444;--danger-hover: #dc2626;--success: #22c55e;--bg: #f8fafc;--card-bg: #ffffff;--text: #1e293b;--text-secondary: #64748b;--border: #e2e8f0;--shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);--shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);--radius: 12px;--radius-sm: 8px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.app{min-height:100vh;display:flex;flex-direction:column}.app-header{background:var(--card-bg);border-bottom:1px solid var(--border);padding:16px 24px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:100;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffffe6}.app-logo{font-size:20px;font-weight:700;color:var(--text);text-decoration:none}.app-nav .nav-link{color:var(--primary);text-decoration:none;font-size:14px;font-weight:500;padding:6px 12px;border-radius:var(--radius-sm);transition:background .2s}.app-nav .nav-link:hover{background:#eef2ff}.app-main{flex:1;max-width:960px;width:100%;margin:0 auto;padding:24px 16px 48px}.app-footer{text-align:center;padding:24px;color:var(--text-secondary);font-size:13px;border-top:1px solid var(--border)}.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:16px}.card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px}.card-title{font-size:18px;font-weight:600}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--card-bg);color:var(--text);font-size:14px;font-weight:500;cursor:pointer;transition:all .2s;text-decoration:none}.btn:hover{background:#f1f5f9}.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary:hover{background:var(--primary-hover)}.btn-danger{background:var(--danger);color:#fff;border-color:var(--danger)}.btn-danger:hover{background:var(--danger-hover)}.btn-sm{padding:4px 10px;font-size:13px}.btn-icon{padding:6px;border:none;background:none;cursor:pointer;color:var(--text-secondary);font-size:16px}.btn-icon:hover{color:var(--danger)}.form-group{margin-bottom:16px}.form-label{display:block;font-size:14px;font-weight:500;margin-bottom:6px;color:var(--text)}.form-input,.form-textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;color:var(--text);background:var(--card-bg);transition:border .2s}.form-input:focus,.form-textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}.form-textarea{min-height:100px;resize:vertical;font-family:inherit;line-height:1.6}.folder-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}.folder-card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;cursor:pointer;transition:all .2s;border:2px solid transparent;text-decoration:none;display:block;color:var(--text)}.folder-card:hover{box-shadow:var(--shadow-md);border-color:var(--primary);transform:translateY(-2px)}.folder-card-icon{font-size:32px;margin-bottom:8px}.folder-card-name{font-size:16px;font-weight:600;word-break:break-all}.folder-card-meta{font-size:12px;color:var(--text-secondary);margin-top:6px}.folder-card-locked{display:inline-flex;align-items:center;gap:4px;font-size:12px;color:var(--primary);margin-top:6px}.empty-state{text-align:center;padding:48px 24px;color:var(--text-secondary)}.empty-state-icon{font-size:48px;margin-bottom:12px}.empty-state-text{font-size:16px}.image-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}.image-item{position:relative;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--border);aspect-ratio:1;background:#f1f5f9}.image-item img{width:100%;height:100%;object-fit:cover;display:block}.image-item .image-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .2s}.image-item:hover .image-overlay{opacity:1}.image-overlay .btn{color:#fff;border-color:#ffffff80;background:#00000080}.note-item{padding:16px;border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:12px}.note-item:last-child{margin-bottom:0}.note-title{font-size:16px;font-weight:600;margin-bottom:6px}.note-content{font-size:14px;color:var(--text);line-height:1.7;white-space:pre-wrap;word-break:break-word}.note-timestamp{font-size:12px;color:var(--text-secondary);margin-top:6px}.note-actions{display:flex;gap:8px;margin-top:8px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:200;padding:16px}.modal-content{background:var(--card-bg);border-radius:var(--radius);padding:24px;width:100%;max-width:500px;max-height:80vh;overflow-y:auto;box-shadow:var(--shadow-md)}.modal-title{font-size:18px;font-weight:600;margin-bottom:16px}.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:16px}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);padding:12px 24px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;z-index:300;box-shadow:var(--shadow-md);animation:slideUp .3s ease}.toast-success{background:#dcfce7;color:#166534;border:1px solid #bbf7d0}.toast-error{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}@keyframes slideUp{0%{transform:translate(-50%) translateY(20px);opacity:0}to{transform:translate(-50%) translateY(0);opacity:1}}.loading{text-align:center;padding:48px;color:var(--text-secondary)}.loading:after{content:"...";animation:dots 1.5s infinite}@keyframes dots{0%,20%{content:"."}40%{content:".."}60%,to{content:"..."}}.password-form{max-width:360px;margin:0 auto;text-align:center}.password-form .form-input{text-align:center;font-size:16px;letter-spacing:4px}.image-preview-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000e6;display:flex;align-items:center;justify-content:center;z-index:300;padding:24px;cursor:zoom-out}.image-preview-overlay img{max-width:90vw;max-height:90vh;object-fit:contain;border-radius:4px}@media (max-width: 640px){.app-main{padding:16px 12px 32px}.folder-grid{grid-template-columns:1fr}.image-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}.card{padding:16px}}.admin-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.admin-tools{display:flex;gap:8px;flex-wrap:wrap}.upload-area{border:2px dashed var(--border);border-radius:var(--radius-sm);padding:24px;text-align:center;cursor:pointer;transition:all .2s;color:var(--text-secondary)}.upload-area:hover{border-color:var(--primary);color:var(--primary);background:#eef2ff}.settings-panel{border-top:1px solid var(--border);padding-top:16px;margin-top:16px}