body {
            min-height: 100vh;
            background: linear-gradient(135deg, #39b54a 45%, #37bbed 100%);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .login-container {
            background: #fff;
            border-radius: 18px;
            box-shadow: 0 4px 24px #0001;
            padding: 42px 36px 28px 36px;
            max-width: 450px;
            width: 100%;
            margin: 30px auto;
            animation: fadeIn .7s;
        }
        @keyframes fadeIn {
            from { opacity:0; transform: translateY(50px);}
            to {opacity:1; transform: none;}
        }
        .login-title {
            text-align: center;
            margin-bottom: 18px;
            font-weight: bold;
            color: #39b54a;
            font-size: 2rem;
            letter-spacing: 1px;
        }
        .form-select, .form-control {
            border-radius: 8px;
        }
        .btn-nutri {
            background: linear-gradient(90deg, #39b54a 50%, #37bbed 100%);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-weight: bold;
            font-size: 1.08rem;
            width: 100%;
            margin-top: 8px;
            box-shadow: 0 2px 8px #39b54a30;
            transition: 0.15s;
        }
        .btn-nutri:hover { filter: brightness(0.96); }
        .icon-nutri {
            color: #39b54a;
            font-size: 2.2rem;
            margin-bottom: 8px;
            display: block;
            text-align: center;
        }
        .form-label { color: #444;}
        .msg-erro {
            background: #fff0f0;
            color: #b00020;
            border: 1px solid #fbb;
            padding: 10px 12px;
            border-radius: 8px;
            margin-bottom: 12px;
            text-align: center;
        }