:root{--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";--accent-primary: #007aff;--accent-primary-hover: #0070e0;--accent-green: #34c759;--accent-green-hover: #2dbf4e;--accent-red: #ff3b30;--accent-red-hover: #ff453a;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-full: 9999px}:root,[data-theme=dark]{--bg-color: #0a0e1a;--bg-color-soft: #1a1f2e;--bg-color-mute: #2a3142;--text-color: #f1f5f9;--text-color-mute: #a1a8b3;--border-color: #2a3142;--border-color-strong: #3a4252;--shadow-color: 0 4px 6px -1px rgba(0, 0, 0, .3), 0 2px 4px -1px rgba(0, 0, 0, .2);--modal-overlay-bg: rgba(0, 0, 0, .8);--modal-shadow: 0 25px 50px -12px rgba(0, 0, 0, .4), 0 10px 20px -5px rgba(0, 0, 0, .2)}[data-theme=light]{--bg-color: #f1f5f9;--bg-color-soft: #ffffff;--bg-color-mute: #e2e8f0;--text-color: #0f172a;--text-color-mute: #64748b;--border-color: #e2e8f0;--border-color-strong: #cbd5e1;--shadow-color: 0 4px 6px -1px rgba(0, 0, 0, .05), 0 2px 4px -1px rgba(0, 0, 0, .03);--modal-overlay-bg: rgba(0, 0, 0, .4);--modal-shadow: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05)}body{margin:0;min-width:320px;min-height:100vh;padding:0;font-family:var(--font-family);background:linear-gradient(135deg,var(--bg-color) 0%,var(--bg-color-soft) 100%);color:var(--text-color);transition:all .3s ease;line-height:1.6}h1,h2,h3{color:var(--text-color);font-weight:600;margin:0}p{margin:0;color:var(--text-color-mute)}.App{width:100%;display:flex;flex-direction:column;align-items:center;min-height:100vh}header{width:100%;padding:1rem 2rem;margin-bottom:1rem;border-bottom:1px solid var(--border-color);display:flex;justify-content:center;align-items:center;position:relative;box-sizing:border-box;background:linear-gradient(135deg,var(--bg-color-soft),var(--bg-color))}header h1{font-size:1.75rem;font-weight:700;margin:0}main{width:100%;padding:0 2rem 2rem;box-sizing:border-box;flex:1}.list-container{max-width:1200px;margin:0 auto;width:100%}.list-container h2{font-size:1.5rem;margin:.75rem 0 1.25rem;padding-bottom:.75rem;border-bottom:2px solid var(--accent-primary);color:var(--text-color);font-weight:600}.btn{font-family:var(--font-family);font-size:.95rem;font-weight:600;padding:.75rem 1.5rem;border-radius:var(--radius-lg);border:none;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center;gap:.5rem;min-height:44px;box-shadow:0 1px 3px #0000001a,0 1px 2px #0000000f;position:relative;overflow:hidden}.btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .5s}.btn:hover:before{left:100%}.btn-primary{background:linear-gradient(135deg,var(--accent-primary),var(--accent-primary-hover));color:#fff;border:1px solid var(--accent-primary);font-weight:700}.btn-primary:hover{background:linear-gradient(135deg,var(--accent-primary-hover),var(--accent-primary));transform:translateY(-2px);box-shadow:0 4px 12px #007aff4d}.list-header-actions .btn-primary{background:linear-gradient(135deg,var(--accent-green),var(--accent-green-hover));border-color:var(--accent-green);box-shadow:0 2px 8px #34c7594d}.list-header-actions .btn-primary:hover{background:linear-gradient(135deg,var(--accent-green-hover),var(--accent-green));box-shadow:0 4px 12px #34c75966}.btn-secondary{background-color:var(--bg-color-soft);color:var(--text-color);border:1px solid var(--border-color)}.btn-secondary:hover{background-color:var(--bg-color-mute);border-color:var(--border-color-strong);transform:translateY(-1px);box-shadow:0 2px 8px #0000001a}.btn-cancel{background-color:var(--bg-color-mute);color:var(--text-color);border:1px solid var(--border-color)}.btn-cancel:hover{background-color:var(--border-color);transform:translateY(-1px)}.btn-icon{background:none;border:none;padding:.5rem;margin:0;cursor:pointer;color:var(--text-color-mute);border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;transition:all .2s ease}.btn-icon:hover{background-color:var(--bg-color-mute);color:var(--text-color)}.search-bar-container{position:relative;width:100%;min-width:200px}.search-bar-icon{position:absolute;top:50%;left:1rem;transform:translateY(-50%);color:var(--text-color-mute);width:1.1rem;height:1.1rem;z-index:1;pointer-events:none}.search-bar-container input{font-family:var(--font-family);font-size:.95rem;width:100%;padding:.875rem 1rem .875rem 3rem;border-radius:var(--radius-lg);border:1px solid var(--border-color);background-color:var(--bg-color-soft);color:var(--text-color);transition:all .3s ease;box-sizing:border-box;box-shadow:0 1px 3px #0000001a,0 1px 2px #0000000f}.search-bar-container input:focus{outline:none;border-color:var(--accent-primary);background-color:var(--bg-color-soft);box-shadow:0 0 0 3px #007aff1a,0 1px 3px #0000001a;transform:translateY(-1px)}.search-bar-container input::placeholder{color:var(--text-color-mute);font-weight:400}.list-header{display:flex;flex-direction:column;gap:1rem;margin-bottom:1.5rem;padding:1.25rem;background:linear-gradient(135deg,var(--bg-color-soft),var(--bg-color-mute));border-radius:var(--radius-lg);border:1px solid var(--border-color);box-shadow:0 2px 8px #0000001a}@media(min-width:768px){.list-header{flex-direction:row;justify-content:space-between;align-items:center;gap:1.5rem;padding:1.5rem}.search-bar-container{width:auto;flex-grow:1;max-width:450px}.list-header-actions{display:flex;gap:1rem;align-items:center}}.view-toggle{display:flex;padding:4px;background-color:var(--bg-color-mute);border-radius:var(--radius-md)}.view-toggle button{background:transparent;border:none;padding:.4rem .8rem;border-radius:var(--radius-sm);color:var(--text-color-mute);cursor:pointer;display:flex;align-items:center;gap:.5rem;font-weight:500;transition:all .2s ease}.view-toggle button.active{background-color:var(--bg-color-soft);color:var(--text-color);box-shadow:0 1px 3px #0000001a,0 1px 2px #0000000f}.view-toggle button svg{width:16px;height:16px}.contact-list{display:grid;gap:1.25rem;margin-top:.5rem}.contact-list.grid-view{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}.contact-list.list-view{grid-template-columns:1fr;gap:.75rem}.contact-card{background:linear-gradient(135deg,var(--bg-color-soft),var(--bg-color-mute));border-radius:var(--radius-lg);border:1px solid var(--border-color);box-shadow:var(--shadow-color);transition:all .3s ease;display:flex;align-items:center;padding:1rem 1.25rem;gap:1rem;position:relative;overflow:hidden}.contact-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent-primary),var(--accent-green));transform:scaleX(0);transition:transform .3s ease}.contact-card:hover{border-color:var(--accent-primary);transform:translateY(-2px);box-shadow:0 8px 25px #00000026}.contact-card:hover:before{transform:scaleX(1)}.contact-avatar{flex-shrink:0;width:40px;height:40px;border-radius:var(--radius-full);background-color:var(--bg-color-mute);display:flex;align-items:center;justify-content:center;color:var(--text-color-mute)}.contact-avatar svg{width:20px;height:20px}.contact-info{flex-grow:1;min-width:0}.contact-info h3{font-size:1rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.contact-info p{font-size:.875rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--text-color-mute)}.delete-btn{flex-shrink:0;color:var(--text-color-mute);background:none;border:none;padding:.5rem;border-radius:var(--radius-full);display:flex;cursor:pointer;transition:all .2s ease}.delete-btn:hover{background-color:var(--bg-color-mute);color:var(--accent-red)}.list-view .contact-info{display:flex;align-items:center;gap:1.5rem}.list-view .contact-info h3{flex-basis:25%}.list-view .contact-info p{flex-basis:35%}.grid-view .contact-card{flex-direction:column;align-items:flex-start;padding:1.5rem;position:relative}.grid-view .contact-info{width:100%}.grid-view .delete-btn{position:absolute;top:.75rem;right:.75rem}.form-container{display:flex;justify-content:center;align-items:center;gap:3rem;padding:2rem;min-height:80vh;background:linear-gradient(135deg,var(--bg-color) 0%,var(--bg-color-soft) 100%);flex-wrap:nowrap;overflow-x:auto}.auth-form{width:100%;max-width:450px;min-width:400px;background-color:var(--bg-color-soft);padding:3rem;border-radius:var(--radius-lg);border:1px solid var(--border-color);box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a;display:flex;flex-direction:column;gap:1.5rem;position:relative;overflow:hidden;flex-shrink:0}.auth-form:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--accent-primary),var(--accent-green))}.auth-form h3{font-size:1.875rem;font-weight:700;text-align:center;margin-bottom:.5rem;color:var(--text-color)}.auth-form input{font-family:var(--font-family);font-size:1rem;padding:1rem 1.25rem;border-radius:var(--radius-lg);border:1px solid var(--border-color);background-color:var(--bg-color);color:var(--text-color);transition:all .3s ease;box-shadow:0 1px 3px #0000001a}.auth-form input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #007aff1a,0 1px 3px #0000001a;transform:translateY(-1px)}.auth-form input::placeholder{color:var(--text-color-mute);font-weight:400}.auth-form .btn{margin-top:1rem;padding:1rem 1.5rem;font-size:1.1rem;font-weight:600;width:100%}.auth-form p{text-align:center;font-size:.95rem;color:var(--text-color-mute)}.auth-form p a{color:var(--accent-primary);font-weight:600;text-decoration:none;transition:all .2s ease}.auth-form p a:hover{text-decoration:underline;color:var(--accent-primary-hover)}.dummy-credentials{margin-top:0;padding:2.5rem;background:linear-gradient(135deg,var(--bg-color-soft),var(--bg-color-mute));border-radius:var(--radius-lg);border:1px solid var(--border-color);box-shadow:var(--shadow-color);max-width:450px;min-width:400px;width:100%;flex-shrink:0;display:flex;flex-direction:column;gap:1.5rem}.dummy-credentials-header{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem;color:var(--accent-primary);font-weight:600;font-size:1rem}.dummy-credentials-header svg{color:var(--accent-primary);flex-shrink:0}.dummy-credentials-text{color:var(--text-color-mute);font-size:.9rem;line-height:1.5;margin-bottom:1.25rem;text-align:center}.credentials-box{background:var(--bg-color);border-radius:var(--radius-md);padding:1rem;border:1px solid var(--border-color-strong)}.credential-item{display:flex;justify-content:space-between;align-items:center;padding:.5rem 0;border-bottom:1px solid var(--border-color)}.credential-item:last-child{border-bottom:none}.credential-label{font-weight:600;color:var(--text-color);font-size:.9rem}.credential-value{font-family:Monaco,Menlo,Ubuntu Mono,monospace;background:var(--bg-color-mute);padding:.25rem .5rem;border-radius:var(--radius-sm);color:var(--accent-primary);font-size:.85rem;font-weight:500;border:1px solid var(--border-color);word-break:break-all;transition:all .2s ease}.credential-value.clickable{cursor:pointer;-webkit-user-select:none;user-select:none}.credential-value.clickable:hover{background:var(--accent-primary);color:#fff;transform:translateY(-1px);box-shadow:0 2px 4px #007aff4d}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:var(--modal-overlay-bg);display:flex;justify-content:center;align-items:center;z-index:1000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);animation:fadeIn .3s ease}.modal-content{background-color:var(--bg-color-soft);padding:2rem;border-radius:var(--radius-lg);width:90%;max-width:520px;box-shadow:0 25px 50px -12px #00000040;border:1px solid var(--border-color);position:relative;animation:slideUp .3s ease;max-height:90vh;overflow-y:auto}.modal-header{display:flex;justify-content:space-between;align-items:center;padding-bottom:1rem;border-bottom:1px solid var(--border-color);margin-bottom:1.5rem}.modal-header h3{font-size:1.25rem}.add-form{display:flex;flex-direction:column;gap:1rem}.add-form input{font-family:var(--font-family);font-size:.9rem;padding:.75rem 1rem;border-radius:var(--radius-md);border:1px solid var(--border-color);background-color:var(--bg-color);color:var(--text-color)}.add-form input:focus{outline:2px solid var(--accent-primary);border-color:var(--accent-primary)}.form-buttons{display:flex;justify-content:flex-end;gap:.75rem;margin-top:1.5rem}.logout-btn{position:absolute;top:50%;left:1rem;transform:translateY(-50%);background-color:var(--bg-color-mute);color:var(--text-color);padding:.6em 1em;font-size:.85rem;font-weight:600;border:none;cursor:pointer;border-radius:var(--radius-md);transition:all .2s ease}.logout-btn:hover{background-color:var(--border-color)}.theme-slider-label{position:absolute;top:50%;right:1rem;transform:translateY(-50%);width:52px;height:28px;display:block}.theme-slider-label input{opacity:0;width:0;height:0}.slider-track{position:absolute;inset:0;background-color:var(--bg-color-mute);border-radius:var(--radius-full);cursor:pointer;transition:background-color .4s ease;border:1px solid var(--border-color)}.slider-thumb{position:absolute;left:4px;bottom:4px;height:20px;width:20px;border-radius:var(--radius-full);background-color:#fff;transition:transform .4s ease;display:flex;align-items:center;justify-content:center;box-shadow:0 1px 3px #0000001a,0 1px 2px #0000000f}.slider-thumb svg{color:#0f172a;width:14px;height:14px}.theme-slider-label input:checked+.slider-track{background-color:var(--accent-primary);border-color:var(--accent-primary)}.theme-slider-label input:checked~.slider-thumb{transform:translate(24px)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.error-message{background:linear-gradient(135deg,#ff3b301a,#ff3b300d);color:var(--accent-red);border:1px solid var(--accent-red);padding:1rem;border-radius:var(--radius-lg);text-align:center;font-weight:600;font-size:.95rem;box-shadow:0 1px 3px #ff3b301a;animation:pulse 2s infinite}.loading,.no-results{text-align:center;padding:3rem 2rem;color:var(--text-color-mute);font-style:italic;grid-column:1 / -1;background:linear-gradient(135deg,var(--bg-color-soft),var(--bg-color-mute));border-radius:var(--radius-lg);border:1px solid var(--border-color);margin:.5rem 0;box-shadow:var(--shadow-color)}@media(max-width:768px){.App{padding:0}main{padding:0 1rem 1.5rem}header{padding:.75rem 1rem;margin-bottom:.75rem}.list-header{gap:.75rem;padding:1rem;margin-bottom:1rem}.search-bar-container{min-width:150px}.contact-list.grid-view{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem}.form-container{flex-direction:row;align-items:center;gap:2rem;padding:1rem;flex-wrap:nowrap}.auth-form{padding:2rem;margin:0;max-width:100%;min-width:350px;flex-shrink:0}.modal-content{margin:1rem;padding:1.5rem}.dummy-credentials{margin-top:0;padding:2rem;max-width:100%;min-width:350px;flex-shrink:0}}@media(max-width:480px){.contact-list.grid-view{grid-template-columns:1fr;gap:.75rem}.btn{padding:.75rem 1rem;font-size:.9rem}.auth-form{padding:1.5rem}.list-header{padding:.75rem}.contact-card{padding:.875rem 1rem}.dummy-credentials{margin-top:0;padding:1.5rem;min-width:300px;flex-shrink:0}.credential-item{flex-direction:column;align-items:flex-start;gap:.5rem}.credential-value{width:100%;text-align:left}}