/* Project Filters Toggle Button */
.project-filters-toggle {
    width: 100%;
    text-align: center;
    margin-bottom: 1.5rem;
}

.filter-toggle-btn {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 0.6rem 1.8rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0 auto;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.filter-toggle-btn span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-icon {
    opacity: 0.7;
    transition: all 0.3s ease;
}

.filter-toggle-btn:hover .filter-icon {
    opacity: 1;
}

.filter-toggle-btn:hover {
    background: var(--surface);
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
}

.toggle-icon {
    transition: all 0.3s ease;
    opacity: 0.7;
}

.filter-toggle-btn:hover .toggle-icon {
    opacity: 1;
}

.filter-toggle-btn.active {
    background: var(--surface);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.filter-toggle-btn.active .toggle-icon {
    transform: rotate(180deg);
    opacity: 1;
}

/* Project Filters Container */
.project-filters {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-out, opacity 0.3s ease-out, margin 0.3s ease-out;
    opacity: 0;
    margin: 0;
    padding: 0;
    background: var(--surface);
    border-radius: 1rem;
    border: 1px solid var(--border);
}

.project-filters.show {
    max-height: 500px;
    opacity: 1;
    margin-bottom: 2rem;
    padding: 1.5rem;
}

.filter-group {
    margin-bottom: 1rem;
}

.filter-group:last-child {
    margin-bottom: 0;
}

.filter-group h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.tech-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    max-width: 100%;
}

.tech-filters .filter-btn {
    min-width: max-content;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tech-filters .filter-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(var(--primary-rgb), 0.1);
}

.tech-filters .filter-btn.active {
    font-weight: 500;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.2);
}

@media (max-width: 768px) {
    .tech-filters {
        gap: 0.5rem;
    }
    .tech-filters .filter-btn {
        font-size: 0.75rem;
        padding: 0.4rem 0.8rem;
    }
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    border-radius: 2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.875rem;
}

.filter-btn:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
    border-color: var(--primary);
}

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

/* Enhanced Project Cards */
.project-card {
    position: relative;
    overflow: hidden;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
    pointer-events: none;
}

.project-card:hover {
    transform: translateY(-8px) scale(1.02);
}

.project-card:hover::before {
    opacity: 0.1;
}

.project-image {
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card:hover .project-image {
    transform: scale(1.1);
}

.project-content {
    position: relative;
    z-index: 2;
    background: linear-gradient(to top, var(--surface) 0%, rgba(var(--surface-rgb), 0.8) 100%);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* Project Badge Animation */
.project-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    background: var(--primary);
    color: white;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover .project-badge {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.3);
}

/* Hide filtered projects */
.project-card.hidden {
    display: none;
}

/* Loading animation for project images */
.project-image.loading {
    animation: imagePulse 1.5s ease-in-out infinite;
}

@keyframes imagePulse {
    0% { opacity: 1; }
    50% { opacity: 0.6; }
    100% { opacity: 1; }
}

/* Easter Egg Animation */
.easter-egg-active .project-card {
    animation: rainbowBorder 2s linear infinite;
}

@keyframes rainbowBorder {
    0% { border-color: #ff0000; }
    17% { border-color: #ff8000; }
    33% { border-color: #ffff00; }
    50% { border-color: #00ff00; }
    67% { border-color: #0000ff; }
    83% { border-color: #8000ff; }
    100% { border-color: #ff0000; }
}