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

        body {
            font-family: 'Roboto', sans-serif;
            background: linear-gradient(135deg, #2596be, #87d2f1, #c2e8f7, #d8f6fb);
            background-attachment: fixed;
            background-size: cover;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .login-container {
            width: 100%;
            max-width: 400px;
            background: #87d2f1;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            padding: 40px 30px;
            animation: fadeIn 0.8s ease-in-out;
        }

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

        .login-header {
            text-align: center;
            margin-bottom: 25px;
        }
        .login-logo {
            max-width: 180px;
            margin: 0 auto;
            /* Como a logo é branca, adiciona sombra para destacá-la */
            filter: drop-shadow(0px 2px 4px rgba(0, 0, 0, 0.5));
        }

        form {
            display: flex;
            flex-direction: column;
        }

        .form-label {
            margin-bottom: 6px;
            font-weight: 500;
            color: #333;
        }

        .form-control {
            border: 1px solid #2596be;
            border-radius: 8px;
            height: 45px;
            padding: 0 15px;
            margin-bottom: 15px;
            font-size: 16px;
            color: #333;
            background-color: #c2e8f7;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .form-control:focus {
            outline: none;
            border-color: #2596be;
            box-shadow: 0 0 8px rgba(37,150,190,0.3);
            background-color: #c2e8f7;
        }

        .btn-primary {
            background-color: #2596be;
            border: none;
            color: #d8f6fb;
            font-weight: 700;
            font-size: 1rem;
            padding: 12px;
            border-radius: 8px;
            margin-top: 10px;
            cursor: pointer;
            transition: background-color 0.3s ease, transform 0.2s ease;
        }

        .btn-primary:hover {
            background-color: #1f7aa5;
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .text-center a {
            color: #2596be;
            text-decoration: none;
            font-weight: 500;
        }

        .text-center a:hover {
            text-decoration: underline;
        }

        .footer {
            text-align: center;
            font-size: 0.85rem;
            color: #333;
            margin-top: 20px;
        }
        .footer a {
            color: #2596be;
            text-decoration: none;
        }
        .footer a:hover {
            text-decoration: underline;
        }

        /* Overlay de carregamento */
        #loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.6);
            z-index: 9999;
            display: none;
            align-items: center;
            justify-content: center;
            flex-direction: column;
        }

        #loading-overlay .spinner {
            border: 6px solid #d8f6fb;
            border-top: 6px solid #2596be;
            border-radius: 50%;
            width: 50px;
            height: 50px;
            animation: spin 1s linear infinite;
            margin-bottom: 15px;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .loading-text {
            color: #d8f6fb;
            font-weight: 600;
        }

        /* Responsividade */
        @media (max-width: 576px) {
            .login-container {
                width: 90%;
                padding: 30px 20px;
            }
        }