@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800;900&display=swap");
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    /* --- DUAL AESTHETIC BACKGROUNDS (Choose One) --- */
    /* OPTION 1: Deep Space (Purple & Dark Blue) */
    background: linear-gradient(135deg, #0f0c29, #d907a5, #2020ac);
    /* OPTION 2: Cotton Candy (Uncomment to use) */
    /* background: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%); */
    /* OPTION 3: Cyberpunk Split (Black & Hot Pink) */
    /* background: linear-gradient(to right, #000000, #434343); */
}

.container {
    position: relative;
    width: 850px;
    height: 550px;
    background: #fff;
    border-radius: 30px;
    box-shadow: 0 0 30px rgba(0, 0, 0, .2);
    overflow: hidden;
    margin: 20px;
}

.form-box {
    position: absolute;
    right: 0;
    width: 50%;
    height: 100%;
    background: #fff;
    display: flex;
    align-items: center;
    color: #333;
    text-align: center;
    padding: 40px;
    z-index: 1;
    transition: .6s ease-in-out 1.2s, visibility 0s 1s;
}

.container.active .form-box {
    right: 50%;
}

.form-box.register {
    visibility: hidden;
}

.container.active .form-box.register {
    visibility: visible;
}

form {
    width: 100%;
}

.container h1 {
    font-size: 36px;
    margin: -10px 0;
}

.input-box {
    position: relative;
    margin: 30px 0;
}

.input-box input {
    width: 100%;
    padding: 13px 50px 13px 20px;
    background: #eee;
    border-radius: 8px;
    border: none;
    outline: none;
    font-size: 16px;
    color: #333;
    font-weight: 500;
}

.input-box input::placeholder {
    color: #888;
    font-weight: 400;
}

.input-box i {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 20px;
}

.eye-icon {
    cursor: pointer;
    z-index: 10;
}

.forgot-link {
    margin: -15px 0 15px;
}

.forgot-link a {
    font-size: 14.5px;
    color: #333;
    text-decoration: none;
}


/* BUTTONS */

.btn {
    width: 100%;
    height: 48px;
    background: linear-gradient(to right, #3a0c91, #d30dc3);
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(215, 109, 119, 0.4);
    border: none;
    cursor: pointer;
    font-size: 16px;
    color: #fff;
    font-weight: 600;
    transition: 0.3s;
}

.container p {
    font-size: 14.5px;
    margin: 15px 0;
}

.social-icons {
    display: flex;
    justify-content: center;
}

.social-icons a {
    display: inline-flex;
    padding: 10px;
    border: 2px solid #ccc;
    border-radius: 8px;
    font-size: 24px;
    color: #333;
    text-decoration: none;
    margin: 0 8px;
    transition: 0.3s ease-in-out;
}

.social-icons a i {
    transition: transform 0.5s ease-in-out;
}

.toggle-box {
    position: absolute;
    width: 100%;
    height: 100%;
}

.toggle-box::before {
    content: '';
    position: absolute;
    left: -250%;
    width: 300%;
    height: 100%;
    background: linear-gradient(to right, #3a1c71, #c20c89);
    border-radius: 150px;
    z-index: 2;
    transition: 1.8s ease-in-out;
}

.container.active .toggle-box::before {
    left: 50%;
}

.toggle-panel {
    position: absolute;
    width: 50%;
    height: 100%;
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 2;
    transition: .6s ease-in-out;
}

.toggle-panel.toggle-left {
    left: 0;
    transition-delay: 1.2s;
}

.container.active .toggle-panel.toggle-left {
    left: -50%;
    transition-delay: .6s;
}

.toggle-panel.toggle-right {
    right: -50%;
    transition-delay: .6s;
}

.container.active .toggle-panel.toggle-right {
    right: 0;
    transition-delay: 1.2s;
}

.toggle-panel p {
    margin-bottom: 20px;
}

.toggle-panel .btn {
    width: 160px;
    height: 46px;
    background: transparent;
    border: 2px solid #fff;
    box-shadow: none;
}

@media screen and (max-width: 650px) {
    .container {
        height: calc(100vh - 40px);
    }
    .form-box {
        bottom: 0;
        width: 100%;
        height: 70%;
    }
    .container.active .form-box {
        right: 0;
        bottom: 30%;
    }
    .toggle-box::before {
        left: 0;
        top: -270%;
        width: 100%;
        height: 300%;
        border-radius: 20vw;
    }
    .container.active .toggle-box::before {
        left: 0;
        top: 70%;
    }
    .toggle-panel {
        width: 100%;
        height: 30%;
    }
    .toggle-panel.toggle-left {
        top: 0;
    }
    .container.active .toggle-panel.toggle-left {
        top: -30%;
        left: 0;
    }
    .toggle-panel.toggle-right {
        right: 0;
        bottom: -30%;
    }
    .container.active .toggle-panel.toggle-right {
        bottom: 0;
    }
}

@media screen and (max-width: 400px) {
    .form-box {
        padding: 20px;
    }
    .toggle-panel h1 {
        font-size: 30px;
    }
}


/* ANIMATIONS & SPECIAL EFFECTS */


/* Login Pulse */

.form-box.login .btn {
    animation: pulse 2s infinite ease-in-out;
}

.form-box.login .btn:hover {
    animation: none;
}


/* Social Media Colors & Spin */


/* 1. Google */

.social-icons a:nth-child(1):hover {
    background: #db4437 !important;
    border-color: #db4437 !important;
    color: #fff !important;
    box-shadow: 0 0 15px #db4437;
}


/* 2. Facebook */

.social-icons a:nth-child(2):hover {
    background: #4267B2 !important;
    border-color: #4267B2 !important;
    color: #fff !important;
    box-shadow: 0 0 15px #4267B2;
}


/* 3. Github */

.social-icons a:nth-child(3):hover {
    background: #1f2328 !important;
    border-color: #1f2328 !important;
    color: #fff !important;
    box-shadow: 0 0 15px #1f2328;
}


/* 4. LinkedIn */

.social-icons a:nth-child(4):hover {
    background: #0077b5 !important;
    border-color: #0077b5 !important;
    color: #fff !important;
    box-shadow: 0 0 15px #0077b5;
}


/* Spin Animation */

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

.social-icons a:hover i {
    animation: spin 1s linear infinite;
}


/* Pulse Animation */

@keyframes pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 25px rgba(215, 109, 119, 0.7);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    }
}