@import url('https://fonts.googleapis.com/css?family=Montserrat:400,800');

        * {
            box-sizing: border-box;
        }

        body {
            background: #f6f5f7;
            display: flex;
            justify-content: center;
            align-items: center;
            flex-direction: column;
            font-family: 'Montserrat', sans-serif;
            height: 100vh;
            margin: 0;
        }

        h1 {
            font-weight: bold;
            margin: 0;
            margin-bottom: 10px;
        }

        p {
            font-size: 14px;
            font-weight: 100;
            line-height: 20px;
            letter-spacing: 0.5px;
            margin: 20px 0 30px;
        }

        span {
            font-size: 12px;
        }

        a {
            color: #333;
            font-size: 14px;
            text-decoration: none;
            margin: 15px 0;
        }

        button {
            border-radius: 20px;
            border: 1px solid var(--primary-color);
            background-color: var(--primary-color);
            color: #fff;
            font-size: 12px;
            font-weight: bold;
            padding: 12px 45px;
            letter-spacing: 1px;
            text-transform: uppercase;
            transition: transform 80ms ease-in;
            cursor: pointer;
        }

        button:active {
            transform: scale(0.95);
        }

        button:focus {
            outline: none;
        }

        button.ghost {
            background-color: transparent;
            color: var(--primary-color);
            border-color: var(--primary-color);
        }

        form {
            background-color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            padding: 0 50px;
            height: 100%;
            text-align: center;
            backface-visibility: hidden;
        }

        input {
            background-color: #eee;
            border: none;
            border-radius: 4px;
            padding: 12px 15px;
            margin: 8px 0;
            width: 100%;
        }
        input:focus {
            outline: 2px solid var(--primary-color);
        }

        /* ===== FLIP CONTAINER ===== */
        .container {
            background-color: transparent;
            width: 768px;
            max-width: 100%;
            min-height: 480px;
            perspective: 1000px;
        }

        .flip-card {
            width: 100%;
            height: 100%;
            position: relative;
            transition: transform 1s;
            transform-style: preserve-3d;
        }

        .container.flip-active .flip-card {
            transform: rotateY(180deg);
        }

        /* ===== FRONT / BACK ===== */
        .form-container {
            position: absolute;
            width: 100%;
            height: 100%;
            border-radius: 10px;
            box-shadow: 0 14px 28px rgba(0, 0, 0, 0.25),
                        0 10px 10px rgba(0, 0, 0, 0.22);
            background: #fff;
        }

        .sign-in-container {
            transform: rotateY(0deg);
        }

        .sign-up-container {
            transform: rotateY(180deg);
        }

        .sign-in-container, .sign-up-container {
            backface-visibility: hidden;
            position: absolute;
            top: 0;
            left: 0;
        }

        /* ===== Social Buttons ===== */
        .social-container {
            margin: 20px 0;
        }

        .social-container a {
            border: 1px solid #ddd;
            border-radius: 50%;
            display: inline-flex;
            justify-content: center;
            align-items: center;
            margin: 0 5px;
            height: 40px;
            width: 40px;
        }
        .social-container a:hover {

            border-color: var(--primary-color);
            background-color: var(--primary-color);


        }
        .social-container a i {
            font-size: 20px;
            color: var(--primary-color);
        }
        .social-container a:hover i {
            color: #fff;
        }
    
        /* ===== Overlay Style ===== */
        .flip-buttons {
            margin-top: 20px;
        }
        
        .flip-buttons button {
            margin: 0 10px;
        }