body {
    background-color: #ffffff;
    color: #e0e0e0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

header {
    text-align: center;
    padding: 2rem 0;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: #ff0404;
}

header p {
    font-size: 1.1rem;
    color: #000000;
}

main {
    width: 90%;
    max-width: 900px;
    background-color: #1e1e1e;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    margin-bottom: 2rem;
}

.controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 2rem;
}

.controls label {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.controls input[type="date"] {
    background-color: #333;
    color: #e0e0e0;
    border: 1px solid #555;
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    appearance: none;
}

#content-container {
    text-align: center;
}

#content-container h2 {
    font-size: 2rem;
    color: #fff;
    margin-bottom: 0.5rem;
}

.apod-date {
    font-style: italic;
    color: #888;
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.apod-media {
    width: 100%;
    max-width: 800px; 
    height: auto;
    object-fit: contain; 
    display: block; 
    margin: 0 auto; 
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    border: 3px solid #444;
}

.apod-explanation {
    margin-top: 1.5rem;
    line-height: 1.6;
    text-align: justify;
}

.loading, .error {
    font-size: 1.2rem;
    color: #00bcd4;
    padding: 2rem;
}

.error {
    color: #ff6347;
}

footer {
    text-align: center;
    padding: 1rem 0;
    color: #000000;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    body {
        font-size: 14px;
    }

    header h1 {
        font-size: 2rem;
    }

    main {
        padding: 1rem;
    }

    #content-container h2 {
        font-size: 1.5rem;
    }
}

footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 2rem;
    color: #b0b0b0;
}

.footer-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.footer-buttons a {
    text-decoration: none;
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.linkedin-btn {
    background-color: #0077b5;
}

.linkedin-btn:hover {
    background-color: #005f92;
}

.github-btn {
    background-color: #2b2b2b;
}

.github-btn:hover {
    background-color: #444;
}

footer p {
    margin: 0;
}

footer p:first-child {
    margin-bottom: 0.5rem;
}

.actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.actions button {
    background-color: #00bcd4; 
    color: #fff;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.actions button:hover:not(:disabled) {
    background-color: #0097a7; 
}

.actions button:disabled {
    background-color: #555;
    cursor: not-allowed;
    opacity: 0.6;
}