/* Keeping all existing CSS above unchanged */
:root {
    --primary-blue: #4B9FFF;
    --dark-bg: #0A0F1C;
    --card-bg: #515151;
    --text-primary: #FFFFFF;
    --text-secondary: #9B95A9;
    --gradient-bg: linear-gradient(180deg, #0A0F1C 0%, #151B2E 100%);
}

html {
    margin: 0;
    padding: 0;
    background: var(--dark-bg);
    min-height: 100%;
    overscroll-behavior-x: none;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--gradient-bg);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.top-nav {
    background-color: var(--dark-bg);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.nav-logo h1 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-actions {
    display: flex;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    padding: 0.5rem;
}

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

.nav-link.active {
    color: var(--primary-blue);
}

.upload-btn {
    cursor: pointer;
    display: inline-block;
}

.btn-content {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    background-color: var(--primary-blue);
    color: white;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-content:hover {
    background-color: #3B8AE5;
    transform: translateY(-1px);
}

.tag-filters {
    margin: 1.5rem 0 2rem 0;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.tag-group {
    flex: 1;
    min-width: 250px;
}

.tag-group h3 {
    margin: 0 0 1rem 0;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.3px;
}

.tag-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-tag {
    padding: 0.75rem 1rem;
    background-color: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.3s ease;
    user-select: none;
    min-height: 44px;
}

.filter-tag input[type="radio"] {
    display: none;
}

.filter-tag:hover {
    background-color: rgba(75, 159, 255, 0.1);
    color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.filter-tag input[type="radio"]:checked + span {
    color: white;
}

.filter-tag input[type="radio"]:checked + span::before {
    background-color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.filter-tag input[type="radio"]:checked {
    background-color: var(--primary-blue);
}

.filter-count {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    min-width: 28px;
    text-align: center;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
    padding: 0.5rem 0;
}

.image-item {
    background: #FFFFFF;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #E0E0E0;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.image-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.image-wrapper {
    width: 100%;
    height: auto;
    min-height: 200px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #9B95A9;
    position: relative;
    padding-bottom: 100%;
}

.image-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #f5f5f5;
}

.image-title {
    padding: 0.75rem;
    color: #333;
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    border-top: 1px solid #E0E0E0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.variant-count {
    font-size: 0.85rem;
    color: var(--primary-blue);
    background-color: rgba(75, 159, 255, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    margin-left: 0.5rem;
    white-space: nowrap;
}

.variant-selector {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(10, 15, 28, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
    animation: fadeIn 0.3s ease;
}

.variant-list {
    background: var(--dark-bg);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.variant-item {
    padding: 1rem;
    color: var(--text-primary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 44px;
}

.variant-item:last-child {
    border-bottom: none;
}

.variant-item:hover {
    background-color: rgba(75, 159, 255, 0.1);
    color: var(--primary-blue);
}

.image-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.image-tag {
    font-size: 0.85rem;
    padding: 0.25rem 0.75rem;
    background-color: rgba(75, 159, 255, 0.1);
    color: var(--primary-blue);
    border-radius: 12px;
    border: 1px solid rgba(75, 159, 255, 0.2);
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: rgba(75, 159, 255, 0.1);
    color: var(--primary-blue);
    border-radius: 8px;
    font-size: 0.9rem;
    border: 1px solid rgba(75, 159, 255, 0.2);
    min-height: 44px;
}

.tag button {
    background: none;
    border: none;
    color: var(--primary-blue);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.tag button:hover {
    opacity: 1;
}

.tag.brandbook-tag {
    background-color: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

.loading, .error {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

.error {
    color: #ff4d4d;
}

.hidden {
    display: none !important;
}

.upload-progress {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.progress-bar {
    height: 6px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-blue);
    width: 0;
    transition: width 0.3s ease;
}

.progress-text {
    margin: 1rem 0 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: center;
}

.footer {
    background-color: var(--dark-bg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    text-align: center;
    margin-top: 2rem;
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.no-images {
    grid-column: 1 / -1;
    text-align: center;
    padding: 2rem;
    background: var(--card-bg);
    border-radius: 12px;
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 1rem;
}

/* Mobile Navigation */
.mobile-menu-btn {
    display: none;
    padding: 0.5rem;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
}

/* Media Queries */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .nav-content {
        padding: 0.75rem;
    }

    .nav-logo h1 {
        font-size: 1.25rem;
    }

    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--dark-bg);
        flex-direction: column;
        padding: 1rem;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-link {
        padding: 0.75rem;
        width: 100%;
        text-align: center;
    }

    .btn-content {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .tag-filters {
        margin: 1rem 0;
        gap: 0.75rem;
    }

    .tag-group {
        min-width: 100%;
    }

    .tag-group h3 {
        font-size: 1rem;
    }

    .image-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 0.75rem;
    }

    .image-wrapper {
        padding-bottom: 100%;
    }

    .image-title {
        padding: 0.5rem;
        font-size: 0.85rem;
    }

    .variant-count {
        padding: 0.25rem 0.5rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .image-grid {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
        gap: 0.5rem;
    }

    .image-wrapper {
        padding-bottom: 100%;
    }

    .filter-tag {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
    }

    .variant-selector {
        padding: 0.5rem;
    }

    .variant-item {
        padding: 0.75rem;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}