/* Global Styles */
:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-color: #1f2937;
    --light-text: #6b7280;
    --background: #ffffff;
    --card-bg: #f8fafc;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-color);
    line-height: 1.5;
    margin: 0;
    padding: 0;
    background: var(--background);
}

/* Header Styles */
.main-header {
    background: var(--background);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

.connect-wallet {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.connect-wallet:hover {
    background: var(--secondary-color);
}

/* Hero Section */
.upcoming-hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 8rem 2rem 4rem;
    text-align: center;
    margin-bottom: 2rem;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.25rem;
    opacity: 0.9;
}

/* NFT Showcase Styles */
.nft-showcase {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.nft-details-panel {
    background: var(--card-bg);
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.nft-document {
    padding: 2rem;
}

.document-header {
    margin-bottom: 2rem;
    text-align: center;
}

.nft-title {
    font-size: 2.5rem;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.coming-soon-badge {
    background: var(--warning-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 500;
}

/* NFT Filters and View Options */
.nft-filters {
    max-width: 1200px;
    margin: 0 auto 2rem;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    border-radius: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.filter-group {
    display: flex;
    gap: 1rem;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    color: var(--light-text);
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.view-options {
    display: flex;
    gap: 0.5rem;
}

.view-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: 0.5rem;
    color: var(--light-text);
    cursor: pointer;
    transition: all 0.3s ease;
}

.view-btn:hover,
.view-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Enhanced Grid Layout */
.upcoming-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    padding: 1rem 0;
}

.upcoming-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.upcoming-list .upcoming-item {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 1.5rem;
}

.upcoming-list .document-image-container {
    height: 100%;
}

.upcoming-list .document-image {
    height: 100%;
    object-fit: cover;
}

/* Enhanced NFT Item Styling */
.upcoming-item {
    background: var(--background);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.upcoming-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.1);
}

.document-image-container {
    position: relative;
    overflow: hidden;
    aspect-ratio: 1;
}

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

.nft-category-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 500;
    z-index: 2;
}

.nft-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.upcoming-item:hover .nft-overlay {
    opacity: 1;
}

.overlay-content {
    text-align: center;
    padding: 1rem;
}

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

.notify-btn,
.preview-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background-color 0.3s ease;
}

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

.notify-btn:hover,
.preview-btn:hover {
    background: var(--accent-color);
}

.document-text {
    padding: 1.5rem;
}

.document-text h3 {
    font-size: 1.25rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.document-text p {
    color: var(--light-text);
    margin-bottom: 1rem;
}

.nft-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--light-text);
    font-size: 0.875rem;
}

.nft-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--light-text);
}

.stat-value {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-color);
}

/* Footer Styles */
.main-footer {
    background: var(--card-bg);
    padding: 4rem 2rem 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.footer-section h4 {
    color: var(--text-color);
    margin-bottom: 1rem;
}

.footer-section p {
    color: var(--light-text);
    margin-bottom: 1rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-link {
    color: var(--light-text);
    font-size: 1.25rem;
    transition: color 0.3s ease;
}

.social-link:hover {
    color: var(--primary-color);
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--light-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.newsletter-form {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.newsletter-form input {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 0.875rem;
}

.newsletter-form button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.newsletter-form button:hover {
    background: var(--secondary-color);
}

.footer-bottom {
    max-width: 1200px;
    margin: 2rem auto 0;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--light-text);
}

/* Responsive Design Updates */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .nft-filters {
        flex-direction: column;
        gap: 1rem;
    }

    .filter-group {
        flex-wrap: wrap;
        justify-content: center;
    }

    .upcoming-list .upcoming-item {
        grid-template-columns: 1fr;
    }

    .upcoming-list .document-image-container {
        aspect-ratio: 16/9;
    }

    .overlay-actions {
        flex-direction: column;
    }

    .nft-stats {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .newsletter-form {
        flex-direction: column;
    }
}

/* Animation Enhancements */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.upcoming-item {
    animation: fadeIn 0.5s ease forwards;
}

.upcoming-item:nth-child(2) {
    animation-delay: 0.1s;
}

.upcoming-item:nth-child(3) {
    animation-delay: 0.2s;
}

.upcoming-item:nth-child(4) {
    animation-delay: 0.3s;
}