* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Google Sans', 'Segoe UI', Roboto, sans-serif;
            min-height: 100vh;
            background: linear-gradient(135deg, #1a1a1a 0%, #0d0d0d 100%);
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
            overflow-x: hidden;
        }

        /* Efecto de partículas animadas */
        .particles {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
        }



        @keyframes float {
            0%, 100% {
                transform: translateY(0) translateX(0);
                opacity: 0.05;
            }
            50% {
                transform: translateY(-50px) translateX(30px);
                opacity: 0.15;
            }
        }

        /* Contenedor principal */
        .login-container {
            position: relative;
            z-index: 1;
            width: 100%;
            max-width: 480px;
            padding: 20px;
            margin: 20px;
        }

        /* Tarjeta de login estilo Firebase */
        .login-card {
            background: rgba(30, 30, 30, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 24px;
            padding: 48px 40px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(254, 144, 2, 0.2);
            transition: all 0.3s ease;
            animation: fadeInUp 0.6s ease-out;
        }

        .login-card:hover {
            border-color: rgba(254, 144, 2, 0.4);
            box-shadow: 0 30px 60px -12px rgba(254, 144, 2, 0.2);
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Logo */
        .logo-wrapper {
            text-align: center;
            margin-bottom: 32px;
        }

        .logo {
            width: 100px;
            height: 100px;
            object-fit: contain;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% {
                transform: scale(1);
                filter: drop-shadow(0 0 0 rgba(254, 144, 2, 0));
            }
            50% {
                transform: scale(1.05);
                filter: drop-shadow(0 0 20px rgba(254, 144, 2, 0.5));
            }
        }

        .logo-text {
            font-size: 28px;
            font-weight: 700;
            margin-top: 16px;
            background: linear-gradient(135deg, #fe9002, #fec500, #dc2d00);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.5px;
        }

        .logo-subtitle {
            color: #9aa0a6;
            font-size: 14px;
            margin-top: 8px;
            font-weight: 400;
        }

        /* Tabs */
        .tabs {
            display: flex;
            gap: 8px;
            margin-bottom: 32px;
            background: rgba(20, 20, 20, 0.8);
            border-radius: 12px;
            padding: 4px;
        }

        .tab {
            flex: 1;
            text-align: center;
            padding: 12px 20px;
            background: transparent;
            border: none;
            color: #9aa0a6;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            border-radius: 8px;
            transition: all 0.2s ease;
            font-family: 'Google Sans', sans-serif;
        }

        .tab.active {
            background: linear-gradient(135deg, #fe9002, #fec500);
            color: #000;
            box-shadow: 0 2px 8px rgba(254, 144, 2, 0.3);
        }

        .tab:hover:not(.active) {
            background: rgba(254, 144, 2, 0.1);
            color: #fe9002;
        }

        /* Formularios */
        .form-panel {
            display: none;
            animation: fadeIn 0.3s ease;
        }

        .form-panel.active-panel {
            display: block;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateX(10px); }
            to { opacity: 1; transform: translateX(0); }
        }

        .input-group {
            margin-bottom: 24px;
            position: relative;
        }

        .input-group i {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: #fe9002;
            font-size: 18px;
            z-index: 1;
        }

        .input-group input {
            width: 100%;
            padding: 14px 16px 14px 48px;
            background: rgba(20, 20, 20, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            color: #fff;
            font-size: 16px;
            transition: all 0.2s ease;
            font-family: 'Google Sans', sans-serif;
        }

        .input-group input:focus {
            outline: none;
            border-color: #fe9002;
            background: rgba(30, 30, 30, 0.95);
            box-shadow: 0 0 0 3px rgba(254, 144, 2, 0.1);
        }

        .input-group input::placeholder {
            color: #5f6368;
        }

        /* Botones */
        .btn-primary {
            width: 100%;
            padding: 14px;
            background: linear-gradient(135deg, #fe9002, #fec500);
            border: none;
            border-radius: 12px;
            color: #000;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
            font-family: 'Google Sans', sans-serif;
            margin-top: 8px;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(254, 144, 2, 0.3);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-primary:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        /* Separador */
        .divider {
            display: flex;
            align-items: center;
            text-align: center;
            margin: 32px 0 24px;
            color: #5f6368;
            font-size: 12px;
        }

        .divider::before,
        .divider::after {
            content: '';
            flex: 1;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .divider span {
            margin: 0 16px;
        }

        /* Botones de redes sociales */
        .social-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            margin-bottom: 24px;
        }

        .social-btn {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(20, 20, 20, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.2s ease;
            text-decoration: none;
            color: #9aa0a6;
            font-size: 22px;
        }

        .social-btn:hover {
            transform: translateY(-3px);
            border-color: #fe9002;
        }

        .social-btn.github:hover { background: #333; color: #fff; }
        .social-btn.facebook:hover { background: #1877f2; color: #fff; border-color: #1877f2; }
        .social-btn.instagram:hover { background: radial-gradient(circle at 30% 110%, #ffdb7e, #f9ce34, #e4405f, #833ab4, #5851db); color: #fff; }
        .social-btn.whatsapp:hover { background: #25d366; color: #fff; border-color: #25d366; }

        /* Enlace de recuperación */
        .forgot-link {
            text-align: center;
            margin-top: 20px;
        }

        .forgot-link a {
            color: #fe9002;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.2s;
        }

        .forgot-link a:hover {
            color: #fec500;
            text-decoration: underline;
        }

        /* Toast Notification - Popup lateral */
        .toast-notification {
            position: fixed;
            top: 20px;
            right: 20px;
            min-width: 280px;
            max-width: 350px;
            background: #1e1e1e;
            border-radius: 12px;
            padding: 0;
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
            z-index: 10000;
            transform: translateX(400px);
            transition: transform 0.3s ease;
            border-left: 4px solid;
            overflow: hidden;
        }

        .toast-notification.show {
            transform: translateX(0);
        }

        .toast-content {
            display: flex;
            align-items: center;
            padding: 14px 16px;
            gap: 12px;
        }

        .toast-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
        }

        .toast-icon i {
            font-size: 14px;
        }

        .toast-message {
            flex: 1;
            font-size: 14px;
            font-weight: 500;
            line-height: 1.4;
            color: white;
        }

        .toast-close {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            border-radius: 6px;
            transition: background 0.2s;
            color: #9aa0a6;
        }

        .toast-close:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }

        /* Colores de toast */
        .toast-notification.success {
            border-left-color: #4caf50;
        }
        .toast-notification.success .toast-icon {
            background: rgba(76, 175, 80, 0.15);
            color: #4caf50;
        }

        .toast-notification.error {
            border-left-color: #dc2d00;
        }
        .toast-notification.error .toast-icon {
            background: rgba(220, 45, 0, 0.15);
            color: #dc2d00;
        }

        .toast-notification.info {
            border-left-color: #fec500;
        }
        .toast-notification.info .toast-icon {
            background: rgba(254, 197, 0, 0.15);
            color: #fec500;
        }

        /* Footer */
        .footer {
            text-align: center;
            margin-top: 24px;
            color: #5f6368;
            font-size: 12px;
        }

        .footer a {
            color: #fe9002;
            text-decoration: none;
        }

        /* Loader */
        .loader {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 2px solid rgba(0, 0, 0, 0.3);
            border-radius: 50%;
            border-top-color: #000;
            animation: spin 0.6s linear infinite;
            margin-right: 8px;
            vertical-align: middle;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Responsive */
        @media (max-width: 520px) {
            .login-card {
                padding: 32px 24px;
            }
            
            .logo {
                width: 80px;
                height: 80px;
            }
            
            .logo-text {
                font-size: 24px;
            }

            .toast-notification {
                left: 20px;
                right: 20px;
                max-width: none;
            }
        }