/* CSS Custom Properties */
:root {
    --text-color: #000;
    --bg-color: #fff;
    --border-color: #000;
    --accent-color: #000;
    --shadow: 0 4px 24px rgba(0,0,0,0.06);
    --radius: 0px; 
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
} 

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-main);
}

body {
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--bg-color);
    font-size: 1.05rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
} 

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
} 

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.6em;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-color);
    letter-spacing: 0.04em;
    transition: color 0.2s ease;
}
.brand-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.2em;
    height: 2.2em;
    font-size: 1.15em;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
    border-radius: 0; 
    margin-right: 0.2em;
}
.brand-text {
    font-size: 1.1em;
    font-weight: 600;
    color: var(--text-color);
} 

.brand:hover {
    color: var(--accent-color);
}

.back-link {
    font-weight: 500;
    color: var(--text-color);
    transition: color 0.2s ease;
}

.back-link:hover {
    color: var(--accent-color);
}

/* Category Filters */
.category-filters {
    display: flex;
    gap: 0.5rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: none;
    color: var(--text-color);
    font-size: 1rem;
    cursor: pointer;
    margin-right: 0.5rem;
} 

.filter-btn:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
}

.filter-btn.is-active {
    background-color: var(--text-color);
    color: var(--bg-color);
    border-color: var(--text-color);
} 

/* Main Content */
.main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Hero Section */
.hero {
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 3rem;
}

.hero-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 2rem 0;
    font-size: 1.18rem;
    font-weight: 500;
    color: var(--text-color);
    background: none;
    border-radius: var(--radius);
    border: 1px solid transparent;
    transition: color 0.2s ease, border 0.2s;
}
.hero-toggle:focus-visible {
    border: 1px solid var(--accent-color);
    outline: none;
} 

.hero-toggle:hover {
    color: var(--accent-color);
}

.toggle-icon {
    font-size: 1.5rem;
    font-weight: 300;
}

.hero-content {
    padding-bottom: 2rem;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    border-radius: 0 0 var(--radius) var(--radius);
    background: #fafbfc;
} 

.bio {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.contact {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.email {
    font-weight: 500;
    color: var(--accent-color);
    transition: color 0.2s ease;
}

.email:hover {
    color: var(--text-color);
}

.social {
    display: flex;
    gap: 1rem;
}

.social-link {
    color: var(--gray-color);
    transition: color 0.2s ease;
}

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

/* Category Legend */
.category-legend h3 {
    margin-bottom: 1rem;
    font-size: 1rem;
    font-weight: 600;
}

.legend-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
}

.legend-color {
    width: 12px;
    height: 12px;
    border: 1px solid var(--border-color);
}

.legend-color.packaging { background-color: #f7b731; }
.legend-color.social_communication { background-color: #45b7d1; }
.legend-color.branding { background-color: #ff6b6b; }

/* Projects Grid */
.projects {
    margin-bottom: 3rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    align-items: start;
}

.project-card {
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
} 

.card-link {
    display: block;
}

.card-image {
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
    border-top-left-radius: var(--radius);
    border-top-right-radius: var(--radius);
} 

.card-image img {
    width: 100%;
    height: auto;
    transition: transform 0.3s ease;
}

.project-card:hover .card-image img {
    transform: scale(1.02);
}

.card-content {
    padding: 1.5rem 1.3rem 1.2rem 1.3rem;
} 

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--bg-color);
}

.card-category.packaging { background-color: #f7b731; }
.card-category.social_communication { background-color: #45b7d1; }
.card-category.branding { background-color: #ff6b6b; }

/* Gallery Grid Rules */
/* Desktop Layout */
@media (min-width: 768px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .project-card.hz {
        grid-column: 1 / -1; /* Full row */
    }
    
    .project-card.vt {
        grid-column: span 1; /* 2 per row */
    }
    
    .project-card.sq {
        grid-column: span 1; /* 2 per row */
    }
}

/* Mobile: 1 column */
@media (max-width: 767px) {
    .nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.8rem;
        padding: 0.7rem 0.7rem 0.5rem 0.7rem;
    }
    .brand {
        font-size: 1.05rem;
    }
    .category-filters {
        flex-wrap: wrap;
        gap: 0.4rem;
    }
    .main {
        padding: 0 0.4rem;
    }
    .hero-toggle {
        font-size: 1rem;
        padding: 1.2rem 0;
    }
    .hero-content {
        grid-template-columns: 1fr;
        gap: 1.2rem;
        padding-top: 1.2rem;
        padding-bottom: 1.2rem;
    }
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }
    .card-content {
        padding: 1.1rem 0.8rem 1rem 0.8rem;
    }
    .footer-content {
        font-size: 0.95rem;
        padding: 1.1rem 0.3rem 1rem 0.3rem;
    }
    .bio {
        font-size: 1rem;
    }
}

/* Project Page Styles */
.project-hero {
    padding: 3rem 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 3rem;
}

.project-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    line-height: 1.2;
}

.project-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

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

.meta-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-color);
}

.meta-value {
    font-size: 1rem;
    font-weight: 500;
}

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

.category-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--bg-color);
}

.category-tag.packaging { background-color: #f7b731; }
.category-tag.social_communication { background-color: #45b7d1; }
.category-tag.branding { background-color: #ff6b6b; }

.project-description {
    font-size: 1.125rem;
    line-height: 1.6;
    max-width: 60ch;
}

/* Gallery */
.gallery {
    margin-bottom: 3rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    align-items: start;
}

.gallery-item {
    border: 1px solid var(--border-color);
}

.gallery-item img {
    width: 100%;
    height: auto;
}

.gallery-item figcaption {
    padding: 1rem;
    font-size: 0.875rem;
    color: var(--gray-color);
    border-top: 1px solid var(--border-color);
}

/* Gallery Layout Rules - Desktop */
@media (min-width: 768px) {
    .gallery-item.hz {
        grid-column: 1 / -1; /* Full row */
    }
    
    .gallery-item.vt {
        grid-column: span 1; /* 2 per row */
    }
    
    .gallery-item.sq {
        grid-column: span 1; /* 2 per row */
    }
}

/* Mobile Gallery: 1 column */
@media (max-width: 767px) {
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .project-title {
        font-size: 2rem;
    }
    
    .project-meta {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

/* Footer Styles */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 1rem 0;
    margin-top: 2rem;
    width: 100%;
}

.footer-content {
    max-width: 100%;
    margin: 0 auto;
    text-align: center;
    padding: 1.5rem 1rem;
    color: var(--text-color);
    font-size: 1rem;
    letter-spacing: 0.01em;
    font-weight: 400;
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.footer .year {
    font-weight: 500;
    color: var(--text-color);
}

/* Focus States for Accessibility */
button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Hidden utility */
[hidden] {
    display: none !important;
}