:root {
    --bg-color: #0d0d0d;
    --text-primary: #f4f4f2;
    --text-secondary: #888884;
    --border-color: #222220;
    --accent-color: #ffffff;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --transition-smooth: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-stack);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

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

/* --- HEADER FIXES --- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 4vw;
    background-color: rgba(13, 13, 13, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.brand-logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--text-primary);
    display: flex;
    align-items: center;
}

.site-nav {
    display: flex;
    gap: 2.5rem;
}

.nav-link {
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

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

/* --- LAYOUT & SPACING --- */
.section-padding {
    padding: 10rem 4vw 6rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

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

.grid-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.section-label {
    font-size: 0.8rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.statement-text {
    font-size: 2rem;
    font-weight: 300;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

.body-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

/* --- HERO SECTION --- */
.hero-section {
    min-height: 100vh;
    padding: 0 4vw;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding-bottom: 6rem;
    position: relative;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 5.5rem);
    font-weight: 300;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 500px;
}

.scroll-cue {
    position: absolute;
    bottom: 2rem;
    right: 4vw;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.scroll-line {
    width: 40px;
    height: 1px;
    background-color: var(--text-secondary);
    transition: width 0.3s ease;
}

.scroll-cue:hover .scroll-line {
    width: 60px;
    background-color: var(--accent-color);
}

/* --- PROJECTS SECTION --- */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 4rem;
}

.filter-controls {
    display: flex;
    gap: 1.5rem;
}

.filter-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    padding-bottom: 0.25rem;
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
}

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

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem 2rem;
}

.project-card {
    cursor: pointer;
}

.project-image-wrapper {
    width: 100%;
    aspect-ratio: 4/3;
    overflow: hidden;
    background-color: #1a1a1a;
    margin-bottom: 1rem;
}

.project-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: transform 0.8s var(--transition-smooth), filter 0.8s var(--transition-smooth);
}

.project-card:hover .project-image {
    transform: scale(1.03);
    filter: grayscale(0%);
}

.project-title {
    font-size: 1.25rem;
    font-weight: 400;
}

.project-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* --- APPROACH SECTION --- */
.approach-item {
    padding-bottom: 2.5rem;
    margin-bottom: 2.5rem;
    border-bottom: 1px solid var(--border-color);
}

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

.approach-item h4 {
    font-size: 1.1rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.approach-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* --- CONTACT SECTION --- */
.contact-details {
    margin-top: 3rem;
    color: var(--text-secondary);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
}

.form-group input, .form-group select, .form-group textarea {
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    border-radius: 0;
    outline: none;
    transition: border-color 0.3s ease;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--accent-color);
}

.form-group select option {
    background-color: var(--bg-color);
    color: var(--text-primary);
}

.submit-btn {
    align-self: flex-start;
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--text-primary);
    padding: 1rem 2.5rem;
    font-size: 0.8rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

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

.form-status {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* --- LIGHTBOX --- */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(13, 13, 13, 0.95);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    max-width: 85%;
    max-height: 80vh;
    object-fit: contain;
}

.lightbox-caption {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

.lightbox-close {
    position: absolute;
    top: 2rem;
    right: 4vw;
    font-size: 2.5rem;
    color: var(--text-primary);
    cursor: pointer;
    line-height: 1;
}

/* --- FOOTER STYLES --- */
.site-footer {
    background-color: #0d0d0d;
    color: #ffffff;
    padding: 80px 4vw 40px;
    border-top: 1px solid var(--border-color);
    font-family: inherit;
    margin-top: auto;
}

.footer-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 40px;
    max-width: 1400px;
    margin: 0 auto 60px;
}

.footer-brand {
    max-width: 320px;
}

.footer-tagline {
    margin-top: 20px;
    color: #888888;
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-nav-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 60px;
}

.footer-column {
    min-width: 140px;
}

.footer-heading {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: #888888;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #e5e5e5;
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: #666666;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* --- ANIMATIONS --- */
.reveal {
    opacity: 1; /* Default visible to prevent white spaces if main.js is omitted */
    transform: translateY(0);
    transition: opacity 0.8s var(--transition-smooth), transform 0.8s var(--transition-smooth);
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    .grid-two-col, .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
    }

    .site-nav {
        gap: 1.25rem;
    }

    .footer-container {
        flex-direction: column;
        gap: 40px;
    }

    .footer-nav-grid {
        gap: 40px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 10px;
    }
}