body {
    font-family: sans-serif;
    background-color: #f0f2f5;
    color: #333;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h1, h2 {
    color: #1c1e21;
}

h1 {
    text-align: center;
    margin-bottom: 10px;
}

p {
    text-align: center;
    margin-bottom: 20px;
    color: #606770;
}

.card {
    background: #fff;
    border: 1px solid #dddfe2;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
}

.form-group input[type="text"] {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}

.form-group small {
    color: #606770;
    font-size: 0.9em;
}

.headers-container, .filters-container {
    margin-bottom: 10px;
}

.header-item, .filter-item {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
    align-items: center;
}

.header-item input, .filter-item input {
    flex: 1;
}

button {
    background-color: #1877f2;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
}

button:hover {
    background-color: #166fe5;
}

.remove-header-btn, .remove-filter-btn {
    background-color: #e4e6eb;
    color: #4b4f56;
}

.remove-header-btn:hover, .remove-filter-btn:hover {
    background-color: #dadde1;
}

.generated-url-container {
    display: flex;
    gap: 10px;
}

#generated-url {
    width: 100%;
    height: 100px;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    resize: vertical;
    font-family: monospace;
}

#copy-url-btn {
    background-color: #42b72a;
}

#copy-url-btn:hover {
    background-color: #36a420;
}