:root{--app-bg: #f4f7f6;--content-bg: #ffffff;--text-primary: #1a202c;--text-secondary: #5a6268;--text-link: #007bff;--border-color: #e2e8f0;--header-border: #eeeeee;--hover-bg: #f1f8ff;--skeleton-bg: #e0e0e0;--add-bg: #28a745;--add-hover: #218838;--add-color: #ffffff;--cancel-bg: #f1f3f5;--cancel-hover: #dee2e6;--danger-bg: #dc3545;--danger-hover: #c82333;--danger-color: #ffffff;--primary-color: #007bff;--input-border: #ccc;--input-focus-border: #007bff;--input-focus-shadow: rgba(0, 123, 255, .25);--input-error-border: #dc3545;--input-error-shadow: rgba(220, 53, 69, .25);--transition-speed: .2s}[data-theme=dark]{--app-bg: #121212;--content-bg: #1e1e1e;--text-primary: #e0e0e0;--text-secondary: #aaaaaa;--text-link: #64b5f6;--border-color: #333333;--header-border: #2a2a2a;--hover-bg: #2c2c2c;--skeleton-bg: #3a3a3a;--add-bg: #2e7d32;--add-hover: #1b5e20;--add-color: #ffffff;--cancel-bg: #333333;--cancel-hover: #444444;--danger-bg: #d32f2f;--danger-hover: #b71c1c;--danger-color: #ffffff;--primary-color: #64b5f6;--input-border: #555;--input-focus-border: #64b5f6;--input-focus-shadow: rgba(100, 181, 246, .25);--input-error-border: #ef5350;--input-error-shadow: rgba(239, 83, 80, .25)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--app-bg);color:var(--text-primary);margin:0;padding:1rem;transition:background-color var(--transition-speed),color var(--transition-speed)}.app-container{max-width:960px;margin:0 auto;padding:1.5rem;background-color:var(--content-bg);border-radius:12px;box-shadow:0 4px 12px #0000000d;transition:background-color var(--transition-speed)}.header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem;padding-bottom:1rem;border-bottom:2px solid var(--header-border);margin-bottom:1.5rem;transition:border-color var(--transition-speed)}.header-title{display:flex;align-items:center;gap:12px}.header-logo{width:40px;height:40px}.header h1{font-size:1.75rem;margin:0}.header-controls{display:flex;align-items:center;gap:10px}.search-input{padding:10px 14px;border:1px solid var(--input-border);background-color:var(--content-bg);color:var(--text-primary);border-radius:6px;font-size:1rem;transition:border-color var(--transition-speed),box-shadow var(--transition-speed)}.search-input:focus{outline:none;border-color:var(--input-focus-border);box-shadow:0 0 0 2px var(--input-focus-shadow)}.btn{padding:10px 16px;font-size:1rem;font-weight:600;border:none;border-radius:6px;cursor:pointer;transition:background-color var(--transition-speed),transform .1s}.btn:active{transform:scale(.98)}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-add{background-color:var(--add-bg);color:var(--add-color)}.btn-add:hover:not(:disabled){background-color:var(--add-hover)}.btn-save{background-color:var(--primary-color);color:var(--add-color)}.btn-save:hover:not(:disabled){opacity:.8}.btn-cancel{background-color:var(--cancel-bg);color:var(--text-primary)}.btn-cancel:hover:not(:disabled){background-color:var(--cancel-hover)}.btn-danger{background-color:var(--danger-bg);color:var(--danger-color)}.btn-danger:hover:not(:disabled){background-color:var(--danger-hover)}.contact-form{overflow:hidden;margin-bottom:1.5rem;background-color:var(--app-bg);border-radius:8px;padding:1.5rem;transition:background-color var(--transition-speed)}.contact-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.contact-form-full{grid-column:1 / -1}.contact-form-actions{display:flex;gap:10px;margin-top:1.5rem;padding-top:1rem;border-top:1px solid var(--border-color)}.form-input-container{display:flex;flex-direction:column}.form-label{margin-bottom:4px;font-weight:500;font-size:.875rem;color:var(--text-secondary)}.form-input{width:100%;padding:10px 14px;border:1px solid var(--input-border);background-color:var(--content-bg);color:var(--text-primary);border-radius:6px;font-size:1rem;transition:border-color var(--transition-speed),box-shadow var(--transition-speed);box-sizing:border-box}.form-input:focus{outline:none;border-color:var(--input-focus-border);box-shadow:0 0 0 2px var(--input-focus-shadow)}.input-error{border-color:var(--input-error-border)}.input-error:focus{box-shadow:0 0 0 2px var(--input-error-shadow)}.form-error{color:var(--input-error-border);font-size:.875rem;margin-top:4px}.phone-input-group{display:flex}.phone-code-select{padding:10px 14px;border:1px solid var(--input-border);background-color:var(--content-bg);color:var(--text-primary);font-size:1rem;transition:border-color var(--transition-speed),box-shadow var(--transition-speed);box-sizing:border-box;border-right:none;width:180px;flex-shrink:0;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url(data:image/svg+xml;charset=US-ASCII,%3Csvg%2A%2A%2A%3E%3Cpath%20fill%3D%22%236c757d%22%2A%2A%2A%3C%2Fsvg%3E);background-repeat:no-repeat;background-position:right 10px center;background-size:8px 10px;border-radius:6px 0 0 6px}.phone-code-select:focus{outline:none;border-color:var(--input-focus-border);box-shadow:0 0 0 2px var(--input-focus-shadow);z-index:2}.phone-input-group .form-input{border-top-left-radius:0;border-bottom-left-radius:0;width:100%;z-index:1}.phone-input-group .form-input:focus{z-index:2}[data-theme=dark] .phone-code-select{background-image:url(data:image/svg+xml;charset=US-ASCII,%3Csvg%2A%2A%2A%3E%3Cpath%20fill%3D%22%23aaaaaa%22%2A%2A%2A%3C%2Fsvg%3E)}.contact-table-wrapper{overflow-x:auto;border:1px solid var(--border-color);border-radius:8px;box-shadow:0 2px 4px #00000005;transition:border-color var(--transition-speed)}.contact-table{width:100%;border-collapse:collapse;min-width:600px}.contact-table th,.contact-table td{text-align:left;padding:14px 12px;border-bottom:1px solid var(--border-color);transition:border-color var(--transition-speed);display:table-cell;vertical-align:middle;white-space:nowrap}.contact-table th{background-color:var(--app-bg);font-weight:600;color:var(--text-secondary);text-transform:uppercase;font-size:.75rem;letter-spacing:.5px;transition:background-color var(--transition-speed);white-space:nowrap}.contact-table tr:last-child td{border-bottom:none}.contact-table tr{transition:background-color var(--transition-speed)}.contact-table tbody tr:hover{background-color:var(--hover-bg)}.avatar-circle{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff;font-size:.875rem;box-shadow:0 1px 2px #0000001a}.action-buttons{display:flex;gap:8px;align-items:center}.action-btn{background:none;border:none;padding:4px;cursor:pointer;border-radius:4px;color:var(--text-secondary);transition:background-color var(--transition-speed),color var(--transition-speed)}.action-btn svg{width:18px;height:18px;stroke-width:2}.action-btn:hover{background-color:var(--cancel-bg)}.action-btn-edit:hover{color:var(--primary-color)}.action-btn-delete:hover{color:var(--danger-bg)}.empty-state{text-align:center;padding:2rem;color:var(--text-secondary)}.skeleton-row td{padding:14px 12px}.skeleton-shape{height:32px;background-color:var(--skeleton-bg);border-radius:6px;position:relative;overflow:hidden}.skeleton-shape.circle{width:32px;border-radius:50%}.skeleton-shape.text{height:20px;margin:6px 0}.skeleton-shape:after{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);animation:skeleton-shimmer 1.5s infinite linear}[data-theme=dark] .skeleton-shape:after{background:linear-gradient(90deg,transparent,rgba(255,255,255,.08),transparent)}@keyframes skeleton-shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}.modal-overlay{position:fixed;inset:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem}.modal-content,.details-modal-content{background:var(--content-bg);padding:1.5rem;border-radius:12px;box-shadow:0 10px 25px #0000001a;width:100%;max-width:500px;border-top:4px solid var(--primary-color)}.modal-content h2{margin-top:0}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:1.5rem}.details-modal-content{max-width:600px}.details-modal-header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-color);padding-bottom:1rem;margin-bottom:1rem}.details-modal-header h2{margin:0;font-size:1.75rem}.details-modal-body{display:flex;flex-direction:column;gap:1.25rem}.detail-item{display:flex;align-items:center;gap:1rem}.detail-item svg{width:20px;height:20px;flex-shrink:0;color:var(--text-secondary)}.detail-item span,.detail-item a{font-size:1rem;line-height:1.5;word-break:break-all}.detail-item a{color:var(--text-link);text-decoration:none}.detail-item a:hover{text-decoration:underline}.detail-item-content{display:flex;justify-content:space-between;align-items:center;width:100%;gap:1rem;flex-wrap:wrap}.detail-item-actions{display:flex;gap:.5rem;flex-shrink:0}.btn-action-link{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:6px;background-color:var(--cancel-bg);color:var(--text-primary);text-decoration:none;font-weight:500;font-size:.875rem;transition:background-color .2s}.btn-action-link:hover{background-color:var(--cancel-hover)}.btn-action-link svg{width:16px;height:16px}.btn-call{color:var(--add-bg)}[data-theme=dark] .btn-call{color:#66bb6a}.btn-message{color:var(--primary-color)}[data-theme=dark] .btn-action-link{color:var(--text-primary)}[data-theme=dark] .btn-message{color:var(--text-link)}.detail-item-catchprase{font-style:italic;color:var(--text-secondary)}.copyable-cell{cursor:pointer;position:relative;display:table-cell;vertical-align:middle}.copy-icon{width:15px;height:15px;color:var(--text-secondary);opacity:0;transition:opacity .2s;flex-shrink:0;position:absolute;right:12px;top:50%;transform:translateY(-50%)}.copyable-cell:hover .copy-icon{opacity:.6}.copyable-cell .copy-icon:hover{opacity:1;color:var(--text-primary)}.clickable-name{cursor:pointer;font-weight:600;color:var(--text-primary);white-space:nowrap}.clickable-name:hover{color:var(--text-link);text-decoration:underline}.group-header td{font-size:1.25rem;font-weight:700;padding-top:1.5rem;padding-bottom:.5rem;color:var(--text-primary);background-color:var(--app-bg);position:-webkit-sticky;position:sticky;top:0;z-index:1;transition:background-color var(--transition-speed)}.theme-toggle-btn{background:var(--cancel-bg);border:none;border-radius:6px;padding:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;width:40px;height:40px;color:var(--text-primary);transition:background-color var(--transition-speed)}.theme-toggle-btn:hover{background:var(--cancel-hover)}.theme-toggle-btn svg{width:20px;height:20px;stroke-width:2.5}.features-list{list-style-type:none;padding-left:0;margin:0}.features-list li{position:relative;padding-left:28px;margin-bottom:12px;line-height:1.5}.features-list li:before{content:"✓";position:absolute;left:0;top:0;color:var(--add-bg);font-weight:700;font-size:1.25rem}[data-theme=dark] .features-list li:before{color:#66bb6a}.features-list strong{color:var(--text-primary)}@media(max-width:768px){.app-container{padding:1rem}.header{flex-direction:column;align-items:stretch}.header-title{justify-content:center}.header-controls{flex-direction:column}.search-input,.btn-add,.theme-toggle-btn{width:100%;box-sizing:border-box}.contact-form-grid{grid-template-columns:1fr}.contact-form-full{grid-column:1 / -1}.detail-item-content{flex-direction:column;align-items:flex-start}.detail-item-actions{width:100%}.btn-action-link{flex-grow:1;justify-content:center}}