:root {
    /* Color variables */
    --background-color: #0D1117; /* Dark background */
    --text-color: #C9D1D9; /* Light grey text */
    --input-background-color: #161B22; /* Slightly lighter input background */
    --input-border-color: #30363D; /* Input border color */
    --button-color: #22C55E; /* Button color */
    --button-hover-color: #16A34A; /* Button hover color */
    --container-padding: 20px; /* Container padding */
}

body, html {
    margin: 0;
    padding: 0;
    font-family: 'Freight Text Pro Book', 'Times New Roman', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6; /* Improved line height for readability */
}

.container {
    max-width: 700px;
    margin: 50px auto;
    background: var(--background-color);
    padding: var(--container-padding);
    border-radius: 8px;
}

.header {
    text-align: center;
    margin-bottom: 30px;
}

.logo img {
    width: 200px; /* Adjust as needed */
    height: auto;
    filter: invert(100%);
}

form {
    display: flex;
    flex-direction: column;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label,
.form-group input {
    width: 100%; /* Full width by default */
}

/* Make input fields two columns on desktop */
@media (min-width: 769px) {
    .form-group {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    button[type=submit] {
        grid-column: span 2; /* Button spans across both columns */
    }
}

/* Responsive styles for mobile devices */
@media (max-width: 768px) {
    .container {
        margin: 20px auto;
        padding: var(--container-padding);
    }

    .logo img {
        width: 150px; /* Smaller logo for mobile */
    }

    h1 {
        font-size: 1.5rem; /* Smaller heading for mobile */
    }

    h2 {
        font-size: 1.25rem; /* Smaller subheading for mobile */
    }

    input[type=text], input[type=email], input[type=number], input[type=url], button[type=submit] {
        box-sizing: border-box; /* Include padding and border in the element's total width and height */
    }
}

label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-color);
}

input[type=text], input[type=email], input[type=number], input[type=url] {
    padding: 12px 20px;
    background-color: var(--input-background-color);
    border: 1px solid var(--input-border-color);
    border-radius: 6px;
    color: var(--text-color);
    font-family: inherit;
}

button[type=submit] {
    background-color: var(--button-color);
    color: white;
    padding: 16px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-family: inherit;
    font-size: 16px;
    transition: background-color 0.3s;
}

button[type=submit]:hover {
    background-color: var(--button-hover-color);
}

h1, h2 {
    color: var(--text-color);
}

#loadingOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 24px;
}
.loading-message {
    margin-bottom: 20px;
}

.lds-ring {
    display: inline-block;
    position: relative;
    width: 80px;
    height: 80px;
}
.lds-ring div {
    box-sizing: border-box;
    display: block;
    position: absolute;
    width: 64px;
    height: 64px;
    margin: 8px;
    border: 8px solid #fff;
    border-radius: 50%;
    animation: lds-ring 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
    border-color: #fff transparent transparent transparent;
}
.lds-ring div:nth-child(1) {
    animation-delay: -0.45s;
}
.lds-ring div:nth-child(2) {
    animation-delay: -0.3s;
}
.lds-ring div:nth-child(3) {
    animation-delay: -0.15s;
}
@keyframes lds-ring {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.success-message {
    color: white;
    background-color: green;
    font-weight: bold;
    padding: 10px 20px;
    border-radius: 5px;
    margin-top: 20px;
    display: none; /* Initially hidden */
}