:root {
    --background-color: #0d1117;
    --text-color: #c9d1d9;
    --card-background: #161b22;
    --card-hover: #21262d;
    --input-background: #1f2328;
    --border-color: #444;
    --btn-primary-bg: #007bff;
    --btn-primary-hover: #0056b3;
    --btn-secondary-bg: #6c757d;
    --btn-secondary-hover: #5a6268;
    --btn-warning-bg: #ffc107;
    --btn-warning-hover: #e0a800;
    --table-background: #161b22;
    --table-hover: #3e3e3e;
    --selected-bg: #2e3040;
    --matched-bg: #4caf50;
    --icon-filter: brightness(0) invert(1);
}

body.light {
    --background-color: #ffffff;
    --text-color: #000000;
    --card-background: #f8f9fa;
    --card-hover: #e2e6ea;
    --input-background: #ffffff;
    --border-color: #ced4da;
    --btn-primary-bg: #007bff;
    --btn-primary-hover: #0056b3;
    --btn-secondary-bg: #6c757d;
    --btn-secondary-hover: #5a6268;
    --btn-warning-bg: #ffc107;
    --btn-warning-hover: #e0a800;
    --table-background: #ffffff;
    --table-hover: #f1f1f1;
    --selected-bg: #ccd4e6;
    --matched-bg: #4caf50;
    --icon-filter: brightness(0);
}

body.light-contrast {
    --background-color: #ffffff;
    --text-color: #000000;
    --card-background: #f0f0f0;
    --card-hover: #e0e0e0;
    --input-background: #d9d9d9;
    --border-color: #888888;
    --btn-primary-bg: #0056b3;
    --btn-primary-hover: #004494;
    --btn-secondary-bg: #5a6268;
    --btn-secondary-hover: #4e555b;
    --btn-warning-bg: #ffcc00;
    --btn-warning-hover: #e0a800;
    --table-background: #f0f0f0;
    --table-hover: #d0d0d0;
    --selected-bg: #ffcc00;
    --matched-bg: #4caf50;
    --icon-filter: brightness(0);
}

body.dark-contrast {
    --background-color: #000000;
    --text-color: #ffffff;
    --card-background: #1a1a1a;
    --card-hover: #333333;
    --input-background: #2a2a2a;
    --border-color: #444444;
    --btn-primary-bg: #007bff;
    --btn-primary-hover: #0056b3;
    --btn-secondary-bg: #6c757d;
    --btn-secondary-hover: #5a6268;
    --btn-warning-bg: #ffc107;
    --btn-warning-hover: #e0a800;
    --table-background: #1a1a1a;
    --table-hover: #333333;
    --selected-bg: #ffc107;
    --matched-bg: #4caf50;
    --icon-filter: brightness(0) invert(1);
}


html,
body,
.row {
    height: 100%;
    margin: 0;
    font-family: 'Arial', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    overflow-x: hidden;
}

main {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
}

.card {
    background-color: var(--card-background);
    border-radius: 12px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    padding: 20px;
    margin: 20px;
    width: 100%;
    max-width: 600px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.card:hover {
    background-color: var(--card-hover);
    transform: translateY(-2px);
}

.input-field {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--input-background);
    color: var(--text-color);
    transition: border-color 0.3s ease;
}

.input-field:focus {
    border-color: var(--btn-primary-bg);
    outline: none;
}

.btn {
    padding: 12px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
    width: 100%;
    color: white;
}

.btn-primary {
    background-color: var(--btn-primary-bg);
}

.btn-primary:hover {
    background-color: var(--btn-primary-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--btn-secondary-bg);
}

.btn-secondary:hover {
    background-color: var(--btn-secondary-hover);
    transform: translateY(-2px);
}

.btn-warning {
    background-color: var(--btn-warning-bg);
    color: black;
}

.btn-warning:hover {
    background-color: var(--btn-warning-hover);
    transform: translateY(-2px);
}

.btn-link {
    background: none;
    color: var(--btn-primary-bg);
    text-decoration: underline;
}

.btn.left {
    transform: none !important;
}

.btn.right {
    transform: none !important;
}

.btn-group {
    transition: transform 0.3s ease;
}

.btn-group:hover {
    transform: translateY(-2px);
}

textarea {
    width: 100%;
    height: 200px;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--input-background);
    color: var(--text-color);
    transition: border-color 0.3s ease;
}

textarea:focus {
    border-color: var(--btn-primary-bg);
    outline: none;
}

@media (max-width: 768px) {
    .btn {
        padding: 12px;
    }
}