/* Modern Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, #f6f9fc 0%, #edf2f7 100%);
    color: #2d3748;
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

/* Modern Form Elements */
input[type="date"] {
    background: #fff;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    padding: 0.8rem 1.2rem;
    font-size: 1rem;
    margin: 0.5rem;
    transition: all 0.3s ease;
}

input[type="date"]:focus {
    border-color: #4299e1;
    box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.2);
    outline: none;
}

/* Enhanced Button Styles */
.button-36 {
    background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    border-radius: 12px;
    border: none;
    padding: 0.8rem 1.6rem;
    color: #ffffff;
    font-weight: 600;
    font-size: 1rem;
    margin: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 6px rgba(99, 102, 241, 0.2);
}

.button-36:hover {
    transform: translateY(-2px);
    box-shadow: 0 7px 14px rgba(99, 102, 241, 0.3);
}

.button-36:active {
    transform: translateY(1px);
}

/* Modern Grid Layout */
#apod-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem;
}

.apod-item {
    background: #ffffff;
    border-radius: 16px;
    overflow: hidden;
    transition: transform 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.apod-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

.apod-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.apod-item:hover img {
    transform: scale(1.05);
}

.apod-item h2 {
    padding: 1rem;
    font-size: 1.2rem;
    color: #1a202c;
}

.apod-item .description {
    padding: 0 1rem 1rem;
    color: #4a5568;
    font-size: 0.95rem;
}

/* Enhanced Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    backdrop-filter: blur(8px);
    background: rgba(0, 0, 0, 0.85);
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.modal img {
    border-radius: 8px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    max-width: 90%;
    max-height: 70vh;
    object-fit: contain;
    transition: transform 0.3s ease;
    cursor: zoom-in;
}

.modal-info {
    background: rgba(255, 255, 255, 0.95);
    padding: 1rem 2rem;
    border-radius: 12px;
    margin-top: 1rem;
    text-align: center;
    max-width: 600px;
    backdrop-filter: blur(10px);
}

.modal-info h3 {
    margin: 0 0 0.5rem 0;
    color: #1a202c;
    font-size: 1.2rem;
}

.modal-date {
    color: #718096;
    margin: 0 0 1rem 0;
    font-size: 0.9rem;
}

.modal-controls {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.modal-btn {
    background: #4299e1;
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0.5rem;
    width: 40px;
    height: 40px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-btn:hover {
    background: #3182ce;
    transform: scale(1.05);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    color: white;
    font-size: 30px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 1001;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

/* Status Elements */
.loading {
    display: none;
    margin: 1rem 0;
    padding: 1rem;
    background: #ebf8ff;
    border-radius: 12px;
    color: #2b6cb0;
    font-weight: 500;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.error-message {
    background: #fff5f5;
    color: #c53030;
    padding: 1rem;
    border-radius: 12px;
    margin: 1rem 0;
    display: none;
    border-left: 4px solid #fc8181;
}

/* Modern Footer */
footer {
    background: #2d3748;
    color: #fff;
    padding: 2rem;
    text-align: center;
    margin-top: 4rem;
    background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
}

footer p {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        margin: 1rem;
        padding: 1rem;
    }

    .button-36 {
        width: 100%;
        margin: 0.5rem 0;
    }

    #apod-container {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 1rem;
    }

    input[type="date"] {
        width: 100%;
        margin: 0.5rem 0;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
        color: #f7fafc;
    }

    .container {
        background: rgba(26, 32, 44, 0.9);
    }

    .apod-item {
        background: #2d3748;
    }

    .apod-item h2 {
        color: #f7fafc;
    }

    .apod-item .description {
        color: #cbd5e0;
    }

    input[type="date"] {
        background: #2d3748;
        border-color: #4a5568;
        color: #f7fafc;
    }
}

/* Image Overlay */
.image-container {
    position: relative;
    overflow: hidden;
    width: 100%;
    aspect-ratio: 16/9;
}

.image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.4) 60%, transparent 100%);
    padding: 20px;
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-container:hover .image-overlay {
    opacity: 1;
}

/* Action Buttons */
.action-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}

.action-btn i {
    font-size: 1.2rem;
}

.action-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.favorite-btn.active {
    background: #e53e3e;
    color: white;
}

/* Tags */
.tags {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

.tag {
    background: #e2e8f0;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    color: #4a5568;
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(45, 55, 72, 0.9);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    opacity: 0;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Loading Animation */
.loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #4299e1;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
    margin-left: 10px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Add hover effect to images */
.image-container:hover img {
    transform: scale(1.05);
}

/* API Notice */
.api-notice {
    background: linear-gradient(135deg, #fef5e7 0%, #fdf2e9 100%);
    border: 1px solid #f6ad55;
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
    color: #744210;
}

.api-notice a {
    color: #c05621;
    text-decoration: none;
    font-weight: 600;
}

.api-notice a:hover {
    text-decoration: underline;
}

/* Search Controls */
.search-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.search-input {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.search-input:focus {
    border-color: #4299e1;
    box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.2);
    outline: none;
}

.date-controls {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.action-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Video Content Styles */
.video-item .video-container {
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.video-placeholder {
    text-align: center;
}

.video-placeholder i {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

/* Image Error Styles */
.image-error {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #e53e3e;
}

.image-error i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.retry-btn {
    background: #4299e1;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 0.5rem;
}

.retry-btn:hover {
    background: #3182ce;
}

/* No Favorites Message */
.no-favorites {
    text-align: center;
    padding: 3rem;
    color: #718096;
    font-size: 1.1rem;
    background: #f7fafc;
    border-radius: 12px;
    margin: 2rem auto;
    max-width: 500px;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Accessibility Improvements */
.action-btn:focus {
    outline: 2px solid #4299e1;
    outline-offset: 2px;
}

img:focus {
    outline: 3px solid #4299e1;
    outline-offset: 3px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}