:root {
    /* Variables */
            
            /* Primary Colors */
            --primary-color: #3498db; /* Blue - Main brand color */
            --primary-light: #5dade2; /* Lighter shade of blue */
            --primary-dark: #2c3e50; /* Darker blue - used for contrast or headings */
            
            /* Secondary Colors */
            --secondary-color: #e74c3c; /* Red - Alerts, buttons for attention */
            --secondary-light: #ec7063; /* Lighter red - used for hover effects */
            --secondary-dark: #943126; /* Dark red - used for deeper accents */
            
            /* Neutral Colors */
            --white: #ffffff; /* White - for backgrounds, cards, and general elements */
            --black: #000000; /* Black - text, headers, footer, or dark backgrounds */
            --gray-light: #ecf0f1; /* Light gray - background for cards or inputs */
            --gray-dark: #95a5a6; /* Dark gray - used for text, borders, and subheadings */
            
            /* Accent Colors */
            --accent-color: #f1c40f; /* Yellow - used for highlights, icons, and interactive elements */
            --accent-light: #f7dc6f; /* Light yellow - hover or focus effects */
            --accent-dark: #b7950b; /* Dark yellow - darker accents or borders */
            
            /* Background Colors */
            --background-color: #f5f5f5; /* Light gray - background color for the main body */
            --background-dark: #1c1c1c; /* Almost black - background color for dark sections like the footer */
            
            /* Text Colors */
            --text-color: #2c3e50; /* Dark gray-blue - used for main body text */
            --text-light: #7f8c8d; /* Lighter gray - for subtext or descriptions */
          }
        
          /* Primary Font - roboto: For everyday reading and content consumption. Use it in paragraphs, form inputs, and general text. */
          @import url('https://fonts.googleapis.com/css2?family=Patrick+Hand+SC&family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swap');
        
          /* Secondary Font - montserrat: To emphasize and create hierarchy in your design. Perfect for headings, titles, and major call-to-action items. */
          @import url('https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,100..900;1,100..900&family=Patrick+Hand+SC&family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swap');
        
          /* Accent Font - merriweather: To highlight key information and decorative elements like quotes, buttons, or special call-to-actions. */
          @import url('https://fonts.googleapis.com/css2?family=Merriweather:ital,wght@0,300;0,400;0,700;0,900;1,300;1,400;1,700;1,900&family=Montserrat:ital,wght@0,100..900;1,100..900&family=Patrick+Hand+SC&family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swap');
        
          /* Monospace Font - source code pro: For technical content like code snippets or commands. */
          @import url('https://fonts.googleapis.com/css2?family=Merriweather:ital,wght@0,300;0,400;0,700;0,900;1,300;1,400;1,700;1,900&family=Montserrat:ital,wght@0,100..900;1,100..900&family=Patrick+Hand+SC&family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&family=Source+Code+Pro:ital,wght@0,200..900;1,200..900&display=swap');
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
    /* End of variables */

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(90deg, #e2e2e2, #4d4d4d);
    font-family: 'Roboto', sans-serif;
}

.container {
    position: relative;
    width: 850px;
    height: 550px;
    background: var(--white);
    border-radius: 30px;
    box-shadow: 0 0 30px rgba(0, 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;
    transition: .6s ease-in-out 1.2s, visibility 0s 1s;
    z-index: 1;
}

.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;
    color: #888;
}

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

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

.btn {
    width: 100%;
    height: 48px;
    background: var(--primary-color);
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border: none;
    cursor: pointer;
    font-size: 16px;
    color: #fff;
    font-weight: 600;
}

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

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

.toggle-box::before {
    content: ' ';
    position: absolute;
    width: 300%;
    height: 100%;
    background: var(--background-dark);
    z-index: 1;
    left: -250%;
    border-radius: 150px;
    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;
    z-index: 5000;
}

.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;
    transition: 0.3s ease-in-out;
}

.toggle-panel .btn:hover {
    background-color: var(--primary-color);
    border: none;
}

.popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 20px;
    border-radius: 5px;
    display: none;
    z-index: 5000;
    justify-content: center;
}

.popup button {
    background-color: #f44336;
    color: white;
    border: none;
    padding: 10px;
    cursor: pointer;
}

.popup button:hover {
    background-color: #d32f2f;
}

.password-popup {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
    z-index: 5000;
}

.popup-content {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    padding: 20px;
    border-radius: 5px;
    text-align: center;
    width: 300px;
}

.popup-content form label {
    margin: 10px;
}

.popup-content form input {
    margin: 10px;
}

.close-button {
    position: absolute;
    top: 10px;
    right: 10px;
    cursor: pointer;
    font-size: 20px;
}

.popup-content button {
    background-color: #f44336;
    color: white;
    border: none;
    padding: 10px;
    cursor: pointer;
}

.popup-content button:hover {
    background-color: #d32f2f;
}

@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 {
        left: 0;
        top: -30%;
    }

    .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;
    }
}