:root {
    --background: #0a0a0a;
    --surface: #141414;
    --primary: #00ff9d;
    --primary-dark: #00cc7d;
    --text: #ffffff;
    --text-secondary: #b0b0b0;
    --accent: #1a1a1a;
    --hover: #202020;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
    --glow: 0 0 20px rgba(0, 255, 157, 0.2);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background: var(--background);
    color: var(--text);
    font-family: 'Inter', 'Arial', sans-serif;
    min-height: 100vh;
    margin: 0;
}

.header {
    background: var(--surface);
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo-container {
    max-width: 200px;
    margin: 0 auto 20px;
    transition: transform 0.3s ease;
}

.logo-container:hover {
    transform: scale(1.05);
}

.logo-container img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 0 10px rgba(0, 255, 157, 0.2));
}

.nav-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}

.nav-button {
    background: var(--surface);
    color: var(--primary);
    border: 2px solid var(--primary);
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

.nav-button:hover, .nav-button.active {
    background: var(--primary);
    color: var(--background);
    transform: translateY(-2px);
    box-shadow: var(--glow);
}

.search-container {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    gap: 10px;
}

.search-input {
    flex-grow: 1;
    padding: 10px;
    border-radius: 6px;
    border: 2px solid var(--primary-dark);
    background: var(--surface);
    color: var(--text);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--glow);
}

.weekly-top {
    background: linear-gradient(45deg, var(--surface), var(--accent));
    padding: 30px 20px;
    margin-bottom: 40px;
    border-bottom: 1px solid var(--primary-dark);
}

.weekly-top h2 {
    text-align: center;
    color: var(--primary);
    margin-bottom: 30px;
    font-size: 24px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.weekly-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.donation-banner {
    background: linear-gradient(45deg, #1a1a1a, #2c2c2c);
    padding: 15px;
    text-align: center;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--primary);
    animation: glow 2s infinite alternate;
}

@keyframes glow {
    from {
        box-shadow: 0 0 5px var(--primary-dark);
    }
    to {
        box-shadow: 0 0 20px var(--primary);
    }
}

.donation-banner a {
    color: var(--primary);
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
}

.donation-banner a:hover {
    color: #fff;
    text-shadow: 0 0 10px var(--primary);
}

/* Pattern Grid and Cards */
.pattern-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
    padding: 20px;
    max-width: 1400px;
    margin: 0 auto;
}

.pattern-card {
    background: var(--surface);
    padding: 15px;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.pattern-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.pattern-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.6);
}

.pattern-card:hover::before {
    transform: scaleX(1);
}

.pattern-card img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.pattern-card:hover img {
    filter: brightness(1.1) contrast(1.1);
    transform: scale(1.02);
}

.pattern-info {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.pattern-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.tag {
    background: var(--primary-dark);
    color: var(--background);
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8em;
}

.pattern-stats {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 0.9em;
}

.difficulty {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8em;
    text-transform: uppercase;
}

.difficulty.beginner { background: #4CAF50; }
.difficulty.intermediate { background: #FFC107; }
.difficulty.advanced { background: #F44336; }

/* Modal Styles */
.pattern-modal {
    display: none;
    position: fixed;
    z-index: 1001;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.9);
    overflow: auto;
}

.modal-content {
    position: relative;
    background: var(--surface);
    margin: 5% auto;
    padding: 20px;
    width: 80%;
    max-width: 800px;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
}

.close-modal {
    position: absolute;
    right: 20px;
    top: 10px;
    color: var(--text-secondary);
    font-size: 28px;
    cursor: pointer;
}

.modal-image-container {
    width: 100%;
    margin-bottom: 20px;
}

.modal-image {
    width: 100%;
    height: auto;
    border-radius: 8px;
}

.pattern-details {
    padding: 20px;
}

/* Buttons */
.button-group {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.download-btn, .upvote-btn {
    flex: 1;
    background: var(--surface);
    color: var(--primary);
    border: 2px solid var(--primary);
    padding: 10px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

.download-btn:hover, .upvote-btn:hover {
    background: var(--primary);
    color: var(--background);
    transform: translateY(-2px);
    box-shadow: var(--glow);
}

.upvoted {
    background: var(--primary);
    color: var(--background);
}

/* Loading Elements */
#load-more {
    display: block;
    margin: 40px auto;
    padding: 15px 40px;
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s ease;
}

#load-more:hover {
    background: var(--primary);
    color: var(--background);
    transform: translateY(-3px);
    box-shadow: var(--glow);
}

.loading-spinner {
    display: none;
    width: 40px;
    height: 40px;
    margin: 20px auto;
    border: 4px solid var(--surface);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-wrap: wrap;
    }
    
    .nav-button {
        flex: 1 1 calc(50% - 10px);
    }
    
    .weekly-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .pattern-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        padding: 10px;
    }

    .button-group {
        flex-direction: column;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
}