:root {
    --background-color: #08041b;
    --container-color: #211e33;
    --text-color: #FFFFFF;
    --error-color: #FF0000;
    --available-color: #00FF00;
    --unavailable-color: #FF0000;
    --button-gradient-left: #FF6200;
    --button-gradient-right: #FF0000;
    --border-radius: 10px;
    --transition-speed: 0.3s;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--background-color);
    margin: 0;
    padding: 0;
}

.headerbg {
    background: transparent;
}

header h1 {
    margin: 0;
    font-weight: 600;
    font-size: 2rem;
    color: var(--text-color);
}

/* Container Styling */
.container {
    background-color: var(--container-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    max-width: 700px;
    margin: 0 auto;
}

/* Form styles */
form {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: none;
    background-color: transparent;
    padding: 0;
}

.form-control {
    border-radius: var(--border-radius);
    border: 1px solid #FFFFFF;
    background-color: #FFFFFF;
    color: #333;
    padding: 0.75rem;
    transition: all var(--transition-speed) ease;
}

.form-control:focus {
    border-color: #FFFFFF;
    box-shadow: none;
}

.form-control:invalid:not(:focus):not(:placeholder-shown) {
    border-color: var(--error-color);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23FF0000' viewBox='0 0 12 12'%3E%3Ccircle cx='6' cy='6' r='4.5'/%3E%3Cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3E%3Ccircle cx='6' cy='8.2' r='.6' fill='%23FF0000' stroke='none'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-control::placeholder {
    color: #999;
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

textarea {
    resize: none;
}

/* Button Styling */
.btn-primary {
    background: linear-gradient(90deg, var(--button-gradient-left), var(--button-gradient-right));
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 2rem;
    font-weight: 600;
    color: var(--text-color);
    transition: transform var(--transition-speed) ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    background: linear-gradient(90deg, var(--button-gradient-right), var(--button-gradient-left));
}

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

.btn-waiting {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Results section */
#results {
    font-family: 'Courier New', Courier, monospace;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--border-radius);
    box-shadow: none;
    color: var(--text-color);
}

#results table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

#results th, #results td {
    padding: 8px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-color);
}

#results th {
    font-weight: 600;
}

#results .available {
    color: var(--available-color);
}

#results .unavailable {
    color: var(--unavailable-color);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.5rem;
    }

    .btn-primary {
        padding: 0.75rem 1.5rem;
    }

    .container {
        max-width: 100%;
        padding: 1.5rem;
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-color);
}

::-webkit-scrollbar-thumb {
    background: #FFFFFF;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #CCCCCC;
}