:root {
    --primary-color: #0078d4;
    --background-color: #f4f4f9;
    --text-color: #333;
    --container-bg: #ffffff;
    --border-color: #ddd;
    --error-color: #d9534f;
    --success-color: #5cb85c;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background-color: var(--container-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    width: 100%;
    text-align: center;
}

header h1 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 10px;
}

header p {
    margin-bottom: 30px;
    color: #666;
}

#bingForm {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

#apiKey {
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
}

#apiKey:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.2);
}

button {
    padding: 12px 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #005a9e;
}

.results-container {
    margin-top: 30px;
    text-align: left;
}

.result-list {
    list-style-type: none;
    padding: 0;
}

.result-list li {
    background-color: #f9f9f9;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 8px;
    word-break: break-all;
}

.loading, .error, .info {
    padding: 15px;
    border-radius: 8px;
    margin-top: 20px;
    font-weight: 500;
    text-align: center;
}

.loading {
    color: #555;
    background-color: #f0f0f0;
}

.error {
    color: #a94442;
    background-color: #f2dede;
    border: 1px solid var(--error-color);
}

.info {
    color: #31708f;
    background-color: #d9edf7;
    border: 1px solid #bce8f1;
}

footer {
    margin-top: 30px;
    font-size: 0.8rem;
    color: #888;
}