:root{--blue: #2563eb;--blue-light: #dbeafe;--blue-dark: #1d4ed8;--green: #059669;--green-light: #d1fae5;--red: #dc2626;--red-light: #fee2e2;--yellow: #d97706;--yellow-light: #fef3c7;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-400: #9ca3af;--gray-600: #4b5563;--gray-800: #1f2937;--white: #ffffff;--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 -1px rgba(0,0,0,.06);--shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -2px rgba(0,0,0,.05);--radius: 12px;--radius-sm: 8px;--nav-height: 64px;--top-bar-height: 56px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-text-size-adjust:100%}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--gray-50);color:var(--gray-800);min-height:100vh;padding-bottom:calc(var(--nav-height) + 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var(--gray-200);display:flex;box-shadow:0 -4px 6px -1px #0000000d;z-index:100}.nav-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;color:var(--gray-400);transition:color .2s;padding:8px 0}.nav-item.active{color:var(--blue)}.nav-item:active{background:var(--gray-50)}.nav-icon{font-size:1.3rem;line-height:1}.nav-label{font-size:.65rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.page-content{max-width:640px;margin:0 auto;padding:16px 16px 0}.page-header{margin-bottom:16px}.page-header h1{font-size:1.35rem;font-weight:700}.btn-primary{background:var(--blue);color:var(--white);padding:12px 20px;border-radius:var(--radius-sm);font-size:.95rem;font-weight:600;transition:background .2s,transform 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1fr;gap:12px}label{font-size:.85rem;font-weight:600;color:var(--gray-600)}input[type=text],input[type=email],input[type=password],input[type=number],input[type=date],select,textarea{width:100%;padding:10px 12px;border:1.5px solid var(--gray-200);border-radius:var(--radius-sm);font-size:.95rem;color:var(--gray-800);background:var(--white);transition:border-color .2s,box-shadow .2s;-webkit-appearance:none}input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px #2563eb1a}textarea{resize:vertical;min-height:80px}.file-input{padding:8px;border:1.5px dashed var(--gray-200);border-radius:var(--radius-sm);cursor:pointer;font-size:.9rem}.photo-preview{border-radius:var(--radius-sm);overflow:hidden;max-height:200px}.photo-preview img{width:100%;height:200px;object-fit:cover}.part-item{display:grid;grid-template-columns:1fr auto auto;gap:8px;align-items:center;margin-bottom:8px}.part-item:last-child{margin-bottom:0}.btn-remove-part{background:var(--red-light);color:var(--red);border:none;width:32px;height:32px;border-radius:6px;font-size:.8rem;display:flex;align-items:center;justify-content:center;flex-shrink:0}.btn-add-part{background:none;color:var(--blue);border:1.5px dashed var(--blue);padding:8px;border-radius:var(--radius-sm);font-size:.85rem;font-weight:600;width:100%;margin-top:8px;transition:background .2s}.btn-add-part:hover{background:var(--blue-light)}.alert{padding:12px 16px;border-radius:var(--radius-sm);font-size:.9rem;font-weight:500;display:flex;align-items:center;gap:8px;margin-bottom:12px}.alert-success{background:var(--green-light);color:var(--green)}.alert-error{background:var(--red-light);color:var(--red)}.warranty-alert{background:var(--yellow-light);border:1.5px solid #fcd34d;border-radius:var(--radius-sm);padding:12px 16px;font-size:.85rem;color:#92400e;margin-bottom:12px}.error-msg{background:var(--red-light);color:var(--red);padding:10px 14px;border-radius:var(--radius-sm);font-size:.9rem}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 0;gap:12px;color:var(--gray-400)}.spinner{width:36px;height:36px;border:3px solid var(--gray-200);border-top-color:var(--blue);border-radius:50%;animation:spin .7s linear infinite}.spinner-sm{display:inline-block;width:16px;height:16px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.no-data{text-align:center;padding:48px 16px;color:var(--gray-400);display:flex;flex-direction:column;align-items:center;gap:16px}.no-data p{font-size:1rem}.search-container{margin-bottom:12px}.search-input{width:100%;padding:10px 14px;border:1.5px solid var(--gray-200);border-radius:var(--radius);font-size:.95rem;background:var(--white)}.search-input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #2563eb1a}.clients-grid{display:flex;flex-direction:column;gap:12px}.client-card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:box-shadow .2s}.client-card:hover{box-shadow:var(--shadow-md)}.card-photo{width:100%;height:160px;overflow:hidden;background:var(--gray-100)}.card-photo img{width:100%;height:100%;object-fit:cover}.no-photo{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:2rem;color:var(--gray-400)}.card-body{padding:14px}.card-header{display:flex;align-items:flex-start;justify-content:space-between;gap:8px;margin-bottom:10px}.card-header h3{font-size:1rem;font-weight:700;line-height:1.3}.status-badge{padding:3px 10px;border-radius:20px;font-size:.72rem;font-weight:700;white-space:nowrap;flex-shrink:0}.status-badge.paid{background:var(--green-light);color:var(--green)}.status-badge.pending{background:var(--yellow-light);color:var(--yellow)}.card-details{display:flex;gap:16px;font-size:.85rem;color:var(--gray-600);margin-bottom:8px}.warranty-row{margin-bottom:8px}.warranty-badge{font-size:.78rem;font-weight:600;padding:3px 10px;border-radius:20px;display:inline-block}.warranty-badge.ok{background:var(--green-light);color:var(--green)}.warranty-badge.warning{background:var(--yellow-light);color:var(--yellow)}.warranty-badge.critical{background:var(--red-light);color:var(--red)}.warranty-badge.expired{background:var(--gray-100);color:var(--gray-400)}.parts-mini{font-size:.8rem;color:var(--gray-600);margin-bottom:6px}.observations{font-size:.82rem;color:var(--gray-600);line-height:1.4;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.card-actions{display:grid;grid-template-columns:1fr 1fr auto;gap:8px;margin-top:10px;padding-top:10px;border-top:1px solid var(--gray-100)}.btn-whatsapp{background:#25d366;color:#fff;padding:8px 12px;border-radius:var(--radius-sm);font-size:.82rem;font-weight:600;transition:background .2s}.btn-whatsapp:hover{background:#1ea952}.btn-edit{background:var(--blue-light);color:var(--blue);padding:8px 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h2{font-size:1.1rem;font-weight:700}.modal-close{background:var(--gray-100);border:none;width:32px;height:32px;border-radius:50%;font-size:1.1rem;color:var(--gray-600);display:flex;align-items:center;justify-content:center;transition:background .2s}.modal-close:hover{background:var(--gray-200)}.modal-form{box-shadow:none;padding:0}.modal-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:8px}@keyframes slideUp{0%{transform:translateY(100%);opacity:0}to{transform:translateY(0);opacity:1}}.month-selector-wrap{margin-bottom:16px}.month-select{width:100%;padding:10px 14px;border:1.5px solid var(--gray-200);border-radius:var(--radius-sm);font-size:.95rem;background:var(--white);font-weight:600;color:var(--gray-800)}.month-select:focus{border-color:var(--blue)}.reports-grid{display:grid;grid-template-columns:1fr 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