#portfolio-header {
    background-color: var(--color-background);
    padding: 4rem 2rem 2rem;
    padding-top: 160px;
    text-align: center;
}
#portfolio-header h1 {
    font-size: 3rem;
    color: white;
    margin-bottom: 0.5rem;
}
#portfolio-header p {
    font-size: 1.25rem;
    color: var(--color-text-special);
}

/* Filter Controls */
#portfolio-controls {
    background-color: var(--color-background);
    padding: 1.5rem 2rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    border-bottom: 1px solid var(--color-onPrimary-lessdark);
    position: sticky;
    top: 70px;
    z-index: 100;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.control-group label {
    color: var(--color-text-special);
    font-family: 'Nunito Semibold', sans-serif;
    font-size: 0.9rem;
}

.control-group select {
    background-color: var(--color-primary);
    color: white;
    border: 1px solid var(--color-onPrimary-lessdark);
    border-radius: 0.5rem;
    padding: 0.5rem 0.75rem;
    padding-right: 0.5rem;
    font-family: 'Nunito Semibold', sans-serif;
    font-size: 0.9rem;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.control-group select:hover,
.control-group select:focus {
    border-color: var(--color-highlight);
    outline: none;
}

#topic-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.topic-checkbox {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    cursor: pointer;
    color: var(--color-text-special);
    font-size: 0.85rem;
}

.topic-checkbox input[type='checkbox'] {
    accent-color: var(--color-highlight);
    cursor: pointer;
    width: 16px;
    height: 16px;
}

.control-group input[type='checkbox'] {
    accent-color: var(--color-highlight);
    cursor: pointer;
    width: 16px;
    height: 16px;
}

/* Portfolio Timeline */
#portfolio-timeline {
    background-color: var(--color-primary);
    padding: 3rem 2rem;
    min-height: 50vh;
    position: relative;
}

#portfolio-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-highlight) 0%, var(--color-onPrimary-lessdark) 100%);
    transform: translateX(-50%);
}

.portfolio-item {
    max-width: 900px;
    margin: 0 auto 2rem;
    position: relative;
    opacity: 1;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.portfolio-item.hidden {
    display: none;
}

.portfolio-item-date {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    position: relative;
}

.date-marker {
    width: 12px;
    height: 12px;
    background-color: var(--color-highlight);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-highlight);
    z-index: 1;
}

.date-text {
    color: var(--color-text-special);
    font-family: 'Nunito Semibold', sans-serif;
    font-size: 0.9rem;
}

.wip-badge {
    background-color: var(--color-highlight);
    color: white;
    font-size: 0.7rem;
    font-family: 'Nunito Bold', sans-serif;
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.portfolio-item-content {
    background-color: var(--color-background);
    border-radius: 1.5rem;
    padding: 1.875rem;
    display: flex;
    gap: 1.875rem;
    text-decoration: none;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.portfolio-item-content:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.4);
}

.portfolio-item-content picture {
    width: 180px;
    height: 135px;
    flex-shrink: 0;
    border-radius: 0.75rem;
    overflow: hidden;
}

.portfolio-item-content picture img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.portfolio-item-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.525rem;
}

.portfolio-item-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.portfolio-item-details h2 {
    color: white;
    font-size: 1.65rem;
    margin: 0;
    line-height: 1.3;
}

.portfolio-item-subtitle {
    color: var(--color-text);
    font-size: 1.275rem;
    margin: 0;
    line-height: 1.4;
}

.portfolio-item-topic {
    color: var(--color-text-special);
    font-size: 1.125rem;
    margin: 0;
    font-family: 'Nunito Semibold', sans-serif;
}

/* Relevance Badges */
.relevance-badge {
    display: inline-block;
    font-size: 0.65rem;
    font-family: 'Nunito Bold', sans-serif;
    padding: 0.15rem 0.4rem;
    border-radius: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    width: fit-content;
}

.relevance-high {
    background-color: #2ecc71;
    color: #000;
}

.relevance-medium {
    background-color: #f39c12;
    color: #000;
}

.relevance-low {
    background-color: #95a5a6;
    color: #000;
}

/* Empty State */
#portfolio-empty {
    background-color: var(--color-primary);
    padding: 4rem 2rem;
    text-align: center;
}

#portfolio-empty p {
    color: var(--color-text-special);
    font-size: 1.25rem;
}

/* Portfolio Post Page Meta */
#portfolio-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem 3rem;
    padding: 1.5rem 2rem;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-onPrimary-lessdark);
    margin-bottom: 2rem;
}

.portfolio-meta-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.meta-label {
    font-size: 0.75rem;
    color: var(--color-text-special);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-family: 'Nunito Semibold', sans-serif;
}

.meta-value {
    font-size: 1rem;
    color: white;
    font-family: 'Nunito Bold', sans-serif;
}

.meta-value a,
a.meta-value {
    color: var(--color-highlight);
    text-decoration: none;
    transition: color 0.2s ease;
}

.meta-value a:hover,
a.meta-value:hover {
    color: white;
    text-decoration: underline;
}

/* Responsive Design */
@media screen and (max-width: 768px) {
    #portfolio-header {
        padding-top: 120px;
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    #portfolio-header h1 {
        font-size: 2rem;
    }
    
    #portfolio-controls {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .control-group {
        width: 100%;
        justify-content: space-between;
    }
    
    #topic-filters {
        justify-content: center;
    }
    
    #portfolio-timeline {
        padding: 2rem 1rem;
    }

    #portfolio-timeline::before {
        left: 50%;
        transform: translateX(-50%);
    }

    .portfolio-item {
        margin-left: 0;
        max-width: 100%;
    }
    
    .portfolio-item-date {
        justify-content: center;
    }

    .date-marker {
        position: relative;
        left: 0;
    }
    
    .portfolio-item-content {
        flex-direction: column;
        padding: 1rem;
    }
    
    .portfolio-item-content picture {
        width: 100%;
        height: 150px;
    }
    
    #portfolio-meta {
        flex-direction: column;
        gap: 1rem;
    }
    
    .portfolio-meta-item {
        flex-direction: row;
        justify-content: space-between;
        width: 100%;
    }
}

@media screen and (max-width: 480px) {
    .portfolio-item-details h2 {
        font-size: 1rem;
    }
    
    .portfolio-item-subtitle {
        font-size: 0.8rem;
    }
}