:root{--primary-color:#25D366;--secondary-color:#128C7E;--accent-color:#DCF8C6;--dark-color:#075E54;--light-color:#E3F2FD;--warning-color:#FF6F00;--danger-color:#D32F2F;--success-color:#388E3C}body{background:linear-gradient(135deg,var(--dark-color),var(--secondary-color));font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;min-height:100vh}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#128C7E 0%,#075E54 100%)}.login-card{animation:fadeInUp 0.6s ease-out}.login-card .card{border:none;border-radius:15px;box-shadow:0 10px 30px rgba(0,0,0,0.3);overflow:hidden}.login-card .card-header{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:white;border:none;padding:2rem}.demo-credentials{position:fixed;bottom:20px;right:20px;width:280px;z-index:1000}.demo-credentials .card{border-radius:10px;font-size:12px;box-shadow:0 4px 15px rgba(0,0,0,0.2)}.sidebar{background:linear-gradient(180deg,var(--dark-color),var(--secondary-color));min-height:100vh;color:white}.sidebar .nav-link{color:rgba(255,255,255,0.8);border-radius:8px;margin:2px 0;transition:all 0.3s ease}.sidebar .nav-link:hover,.sidebar .nav-link.active{background-color:rgba(255,255,255,0.1);color:white}.main-content{background-color:#f8f9fa;min-height:100vh}.navbar{background:white;box-shadow:0 2px 4px rgba(0,0,0,0.1)}.stats-card{border:none;border-radius:15px;transition:transform 0.3s ease;overflow:hidden}.stats-card:hover{transform:translateY(-5px)}.stats-card.success{background:linear-gradient(135deg,var(--success-color),#4CAF50);color:white}.stats-card.warning{background:linear-gradient(135deg,var(--warning-color),#FF9800);color:white}.stats-card.info{background:linear-gradient(135deg,#2196F3,#03A9F4);color:white}.stats-card.danger{background:linear-gradient(135deg,var(--danger-color),#F44336);color:white}.device-card{border:none;border-radius:12px;transition:all 0.3s ease;position:relative}.device-card:hover{box-shadow:0 5px 20px rgba(0,0,0,0.1);transform:translateY(-2px)}.device-status.connected{color:var(--success-color)}.device-status.disconnected{color:var(--warning-color)}.device-status.error{color:var(--danger-color)}.device-status-badge{transition:all 0.3s ease;font-size:0.85rem;padding:0.4rem 0.6rem}.device-status-badge .fa-spinner{animation:spin 1s linear infinite}@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}#addDeviceLoader{animation:fadeIn 0.3s ease}#addDeviceLoader .spinner-border{width:3rem;height:3rem;border-width:0.3rem}@keyframes fadeIn{from{opacity:0}to{opacity:1}}.refresh-status-btn{transition:all 0.2s ease}.refresh-status-btn:hover:not(:disabled){transform:rotate(180deg)}.refresh-status-btn:active{transform:scale(0.95)}.refresh-status-btn i{transition:transform 0.3s ease}.loading-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(255,255,255,0.9);display:flex;align-items:center;justify-content:center;border-radius:12px;z-index:10}.loading-overlay .spinner-border{width:2rem;height:2rem}.qr-code-container{text-align:center;padding:20px}.qr-code-container img{max-width:100%;height:auto;border:3px solid var(--primary-color);border-radius:10px}.message-form{background:white;border-radius:15px;padding:25px;box-shadow:0 4px 15px rgba(0,0,0,0.1)}.table-responsive{border-radius:10px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,0.1)}.table th{background-color:var(--secondary-color);color:white;border:none}.btn-whatsapp{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));border:none;color:white;transition:all 0.3s ease}.btn-whatsapp:hover{background:linear-gradient(135deg,var(--secondary-color),var(--dark-color));color:white;transform:translateY(-2px)}.badge.status-queued{background-color:var(--warning-color)}.badge.status-sent{background-color:var(--success-color)}.badge.status-failed{background-color:var(--danger-color)}.badge.status-connected{background-color:var(--success-color)}.badge.status-disconnected{background-color:var(--warning-color)}.badge.status-error{background-color:var(--danger-color)}.badge.status-active{background-color:var(--success-color)}.badge.status-inactive{background-color:var(--warning-color)}.stats-card .card-body{border-radius:15px}.stats-card.success .card-body{background:linear-gradient(135deg,var(--success-color),#4CAF50) !important}.stats-card.info .card-body{background:linear-gradient(135deg,#2196F3,#03A9F4) !important}.stats-card.warning .card-body{background:linear-gradient(135deg,var(--warning-color),#FF9800) !important}.stats-card.danger .card-body{background:linear-gradient(135deg,var(--danger-color),#F44336) !important}.loading{position:relative}.loading::after{content:'';position:absolute;top:50%;left:50%;width:20px;height:20px;margin:-10px 0 0 -10px;border:2px solid var(--primary-color);border-radius:50%;border-top-color:transparent;animation:spin 1s linear infinite}@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width:768px){.sidebar{position:fixed;top:0;left:-100%;width:280px;z-index:1050;transition:left 0.3s ease}.sidebar.show{left:0}.main-content{margin-left:0}.demo-credentials{position:static;margin-top:20px;width:100%}}.dark-mode{background-color:#1a1a1a;color:#ffffff}.dark-mode .card{background-color:#2d2d2d;border-color:#404040}.dark-mode .navbar{background-color:#2d2d2d !important;border-color:#404040}.dark-mode .table{background-color:#2d2d2d;color:#ffffff}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#f1f1f1;border-radius:10px}::-webkit-scrollbar-thumb{background:var(--primary-color);border-radius:10px}::-webkit-scrollbar-thumb:hover{background:var(--secondary-color)}.sidebar-balance{background:rgba(255,255,255,0.1) !important;border-radius:8px;transition:all 0.3s ease}.sidebar-balance:hover{background:rgba(255,255,255,0.15) !important;transform:translateY(-1px)}.sidebar-balance .balance-section{padding:8px 0}.sidebar-balance .balance-section:not(:last-child){border-bottom:1px solid rgba(255,255,255,0.1);margin-bottom:8px;padding-bottom:8px}.sidebar-balance .progress{height:3px;background-color:rgba(255,255,255,0.2);border-radius:2px}.sidebar-balance .progress-bar{border-radius:2px}.sidebar-balance .available-section{background:rgba(255,255,255,0.05);border-radius:6px;padding:8px;text-align:center}.sidebar-balance .available-count{font-size:1.25rem;font-weight:bold;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,0.3)}.alert{border:none;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)}.alert-danger{background:linear-gradient(135deg,#ff4757,#ff3838);color:white}.alert-warning{background:linear-gradient(135deg,#ffa502,#ff6348);color:white}.alert-info{background:linear-gradient(135deg,#3742fa,#2f3542);color:white}