@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
    text-decoration: none;
    list-style: none;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #e2e2e2 0%, #c9d6ff 100%);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.container {
    position: relative;
    width: 850px;
    height: 550px;
    background: #fff;
    margin: 20px;
    border-radius: 30px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2), 
                0 5px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.container:hover {
    transform: translateY(-5px);
}

.container h1 {
    font-size: 36px;
    margin: -10px 0;
    background: linear-gradient(90deg, #7494ec, #8a7bec);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.container p {
    font-size: 14.5px;
    margin: 15px 0;
    color: #555;
}

form { 
    width: 100%; 
}

.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; 
}

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

.input-box input {
    width: 100%;
    padding: 13px 50px 13px 20px;
    background: #f5f5f5;
    border-radius: 8px;
    border: 2px solid transparent;
    outline: none;
    font-size: 16px;
    color: #333;
    font-weight: 500;
    transition: all 0.3s ease;
}

.input-box input:focus {
    border-color: #7494ec;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(116, 148, 236, 0.2);
}

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

.input-box i {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 20px;
    color: #888;
    transition: color 0.3s ease;
}

.input-box input:focus + i {
    color: #7494ec;
}

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

.forgot-link a {
    font-size: 14.5px;
    color: #333;
    transition: color 0.3s ease;
    position: relative;
}

.forgot-link a:hover {
    color: #7494ec;
}

.forgot-link a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: #7494ec;
    transition: width 0.3s ease;
}

.forgot-link a:hover::after {
    width: 100%;
}

.btn {
    width: 100%;
    height: 48px;
    background: linear-gradient(90deg, #7494ec, #8a7bec);
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(116, 148, 236, 0.3);
    border: none;
    cursor: pointer;
    font-size: 16px;
    color: #fff;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(116, 148, 236, 0.4);
}

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

.btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.7s ease;
}

.btn:hover::after {
    left: 100%;
}

.social-icons {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.social-icons a {
    display: inline-flex;
    padding: 10px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 24px;
    color: #555;
    margin: 0 8px;
    transition: all 0.3s ease;
}

.social-icons a:hover {
    border-color: #7494ec;
    color: #7494ec;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(116, 148, 236, 0.2);
}

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

.toggle-box::before {
    content: '';
    position: absolute;
    left: -250%;
    width: 300%;
    height: 100%;
    background: linear-gradient(135deg, #7494ec 0%, #8a7bec 100%);
    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;
    padding: 40px;
    text-align: center;
}

.toggle-panel h1 {
    color: #fff;
    background: none;
    -webkit-background-clip: initial;
    background-clip: initial;
    margin-bottom: 20px;
}

.toggle-panel p { 
    margin-bottom: 20px;
    color: rgba(255,255,255,0.9);
}

.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 .btn {
    width: 160px;
    height: 46px;
    background: transparent;
    border: 2px solid #fff;
    box-shadow: none;
    transition: all 0.3s ease;
}

.toggle-panel .btn:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}

/* Decorative elements */
.container::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: rgba(116, 148, 236, 0.1);
    z-index: 0;
}

.container::after {
    content: '';
    position: absolute;
    bottom: -30px;
    left: -30px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(138, 123, 236, 0.1);
    z-index: 0;
}

/* Responsive styles */
@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%;
    }

    .container.active .toggle-panel.toggle-left {
        left: 0;
        top: -30%;
    }

    .toggle-panel { 
        width: 100%;
        height: 30%;
    }
    
    .toggle-panel.toggle-left { 
        top: 0; 
    }
    
    .toggle-panel.toggle-right {
        right: 0;
        bottom: -30%;
    }

    .container.active .toggle-panel.toggle-right { 
        bottom: 0; 
    }
    
    /* Hide decorative circles on mobile */
    .container::before,
    .container::after {
        display: none;
    }
}

@media screen and (max-width: 400px) {
    .form-box { 
        padding: 20px; 
    }

    .toggle-panel h1 {
        font-size: 30px; 
    }
    
    .input-box {
        margin: 20px 0;
    }
}