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

:root {
    --primary: #000000;
    --secondary: #666666;
    --accent: #999999;
    --light-bg: #FAFAFA;
    --white: #FFFFFF;
    --border: #E5E5E5;
    --highlight: #000000;
    --highlight2: #97A399;
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    font-size: 13px;
    font-weight: 300;
    line-height: 1.7;
    color: var(--primary);
    background: var(--white);
    letter-spacing: -0.01em;
}

header {
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--highlight);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.2rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 400;
    color: var(--primary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--secondary);
    font-size: 11px;
    font-weight: 300;
    transition: color 0.2s;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.nav-links a:hover {
    color: var(--highlight);
}

.hero {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 8rem 3rem 6rem;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-photo {
    width: 120px;
    height: 160px;
    border-radius: 0;
    object-fit: cover;
    margin: 0 0 2rem 0;
    display: block;
    border: 1px solid var(--border);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.hero-photo:hover {
    transform: translateY(-2px);
    border-color: var(--highlight);
}

/* Fun Fact Card Styles */
.fun-fact-card {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: var(--white);
    border: 2px solid var(--highlight);
    padding: 2.5rem;
    max-width: 400px;
    width: 90%;
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.fun-fact-card.active {
    opacity: 1;
    pointer-events: all;
    transform: translate(-50%, -50%) scale(1);
}

.fun-fact-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.fun-fact-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.fun-fact-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 24px;
    cursor: pointer;
    color: var(--secondary);
    background: none;
    border: none;
    font-weight: 200;
    transition: color 0.2s;
}

.fun-fact-close:hover {
    color: var(--highlight);
}

.fun-fact-letter {
    font-family: 'JetBrains Mono', monospace;
    font-size: 48px;
    font-weight: 300;
    color: var(--highlight);
    margin-bottom: 1rem;
    text-align: center;
}

.fun-fact-text {
    font-size: 14px;
    line-height: 1.8;
    color: var(--secondary);
    text-align: center;
}

/* UPDATED: Interactive heading with letter hover effect */
.hero h1 {
    font-size: 48px;
    font-weight: 200;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    color: var(--primary);
    line-height: 1.1;
    cursor: default;
    display: flex;
    gap: 1px;
}

.hero h1 span {
    display: inline-block;
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), font-weight 0.2s ease, color 0.2s ease;
    font-weight: 200;
}

.hero h1 span:hover {
    font-weight: 500;
    color: var(--highlight);
    transform: scale(1.05) translateY(-2px);
}

.hero .subtitle {
    font-size: 15px;
    font-weight: 300;
    margin-bottom: 2.5rem;
    color: var(--secondary);
    letter-spacing: 0.01em;
}

.hero .description {
    font-size: 14px;
    font-weight: 300;
    line-height: 1.8;
    color: var(--secondary);
    max-width: 650px;
    letter-spacing: 0.01em;
}

.hero-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border);
}

.metric {
    text-align: left;
}

.metric-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 28px;
    font-weight: 300;
    color: var(--primary);
    margin-bottom: 0.3rem;
}

.metric-label {
    font-size: 10px;
    font-weight: 300;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.skills {
    padding: 3rem 3rem;
    background: var(--light-bg);
    border-bottom: 1px solid var(--border);
}

.skills-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.skill-badge {
    background: var(--white);
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    font-size: 10px;
    font-weight: 300;
    color: var(--secondary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: all 0.2s;
}

.skill-badge:hover {
    border-color: var(--highlight);
    color: var(--primary);
}

/* Category Tabs */
.category-tabs {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 2rem 3rem 0;
    position: sticky;
    top: 66px;
    z-index: 90;
    backdrop-filter: blur(10px);
}

.tabs-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    gap: 0;
}

.tab-btn {
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    padding: 1rem 2rem;
    font-size: 11px;
    font-weight: 400;
    color: var(--secondary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'Inter', sans-serif;
}

.tab-btn:hover {
    color: var(--highlight);
}

.tab-btn.active {
    color: var(--highlight);
    border-bottom-color: var(--highlight);
}

/* UPDATED: Removed grey background from projects section */
section {
    padding: 5rem 3rem;
    background: var(--white);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    font-size: 10px;
    color: var(--secondary);
    margin-bottom: 4rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
}

.project-card {
    background: var(--white);
    padding: 3rem;
    transition: background 0.2s, transform 0.2s;
    cursor: pointer;
}

.project-card:hover {
    background: var(--light-bg);
    transform: translateY(-2px);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.project-number {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    color: var(--accent);
    letter-spacing: 0.1em;
}

.project-year {
    font-size: 10px;
    color: var(--accent);
    letter-spacing: 0.05em;
}

/* PROJECT IMAGES */
.project-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
    background: var(--light-bg);
}

.project-image[src^="data:"],
.modal-image[src^="data:"] {
    object-fit: none;
    background: var(--light-bg);
}

.project-title {
    font-size: 20px;
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-weight: 300;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.project-meta {
    color: var(--secondary);
    font-size: 11px;
    margin-bottom: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.01em;
}

.project-description {
    color: var(--secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
    font-size: 13px;
    font-weight: 300;
}

.project-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stat {
    text-align: center;
}

.stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 22px;
    font-weight: 300;
    color: var(--primary);
    margin-bottom: 0.3rem;
}

.stat-label {
    font-size: 9px;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

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

.tag {
    background: transparent;
    border: 1px solid var(--border);
    padding: 0.3rem 0.8rem;
    font-size: 9px;
    color: var(--secondary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-weight: 300;
}

.contact {
    background: var(--light-bg);
    border-top: 1px solid var(--border);
    padding: 5rem 3rem;
}

.contact .container {
    text-align: center;
    max-width: 700px;
}

.contact p {
    font-size: 13px;
    color: var(--secondary);
    line-height: 1.8;
    margin-bottom: 3rem;
    font-weight: 300;
}

.contact-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.contact-btn {
    background: transparent;
    color: var(--primary);
    padding: 1rem 2rem;
    border: 1px solid var(--border);
    text-decoration: none;
    font-weight: 300;
    font-size: 11px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: all 0.2s;
}

.contact-btn:hover {
    background: var(--highlight);
    color: var(--white);
    border-color: var(--highlight);
}

footer {
    background: var(--primary);
    color: var(--white);
    text-align: center;
    padding: 2rem;
    font-size: 10px;
    font-weight: 300;
    letter-spacing: 0.05em;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    z-index: 1000;
    overflow-y: auto;
    padding: 3rem;
}

.modal.active {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.modal-content {
    background: var(--white);
    border: 1px solid var(--border);
    padding: 4rem;
    max-width: 900px;
    width: 100%;
    margin-top: 3rem;
    position: relative;
}

.modal-close {
    position: sticky;
    top: 1rem;
    float: right;
    z-index: 10;
    font-size: 24px;
    cursor: pointer;
    color: red;
    background: var(--card-bg);
    border: none;
    font-weight: 200;
    transition: color 0.2s;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--highlight);
}

.modal-title {
    font-size: 28px;
    color: var(--primary);
    margin-bottom: 2rem;
    font-weight: 300;
    letter-spacing: -0.02em;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

/* MODAL IMAGES */
.modal-image {
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    margin-bottom: 2rem;
    border: 1px solid var(--border);
    background: var(--light-bg);
}

.modal-section {
    margin-bottom: 3rem;
}

.modal-section h3 {
    color: var(--highlight2);
    margin-bottom: 1rem;
    font-size: 12px;
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.modal-section p {
    font-size: 13px;
    line-height: 1.8;
    color: var(--secondary);
    font-weight: 300;
}

.modal-section ul {
    list-style: none;
    padding-left: 0;
}

.modal-section li {
    font-size: 13px;
    line-height: 1.8;
    color: var(--secondary);
    font-weight: 300;
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
}

.modal-section li:before {
    content: "—";
    position: absolute;
    left: 0;
    color: var(--accent);
}

.highlight-box {
    background: var(--light-bg);
    border: 1px solid var(--border);
    padding: 2rem;
    margin: 2rem 0;
}

@media (max-width: 768px) {
    nav {
        padding: 1rem 1.5rem;
        flex-direction: column;
        gap: 1rem;
    }

    .fun-fact-card {
        max-width: 90%;
        padding: 2rem;
    }

    .fun-fact-letter {
        font-size: 36px;
    }

    .nav-links {
        gap: 1.5rem;
    }

    .hero {
        padding: 5rem 1.5rem 4rem;
    }

    .hero h1 {
        font-size: 32px;
        flex-wrap: wrap;
    }

    section {
        padding: 3rem 1.5rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .project-card {
        padding: 2rem;
    }

    .modal {
        padding: 1rem;
    }

    .modal-content {
        padding: 2rem 1.5rem;
        margin-top: 1rem;
    }

    .project-stats {
        grid-template-columns: 1fr;
    }

    .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
    }

    .category-tabs {
        padding: 1rem 1.5rem 0;
    }

    .tabs-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .tab-btn {
        white-space: nowrap;
        padding: 1rem 1.5rem;
    }

    .sort-controls {
        margin-bottom: 1.5rem;
    }
}

/* Sort Controls */
.sort-controls {
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.sort-label {
    font-size: 10px;
    font-weight: 400;
    color: var(--secondary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.sort-select {
    appearance: none;
    -webkit-appearance: none;
    background: transparent;
    border: 1px solid var(--border);
    padding: 0.5rem 2rem 0.5rem 0.8rem;
    font-size: 10px;
    font-weight: 300;
    color: var(--secondary);
    letter-spacing: 0.03em;
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'Inter', sans-serif;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23999'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.6rem center;
}

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