/* =====================================================
   RESET & BASE STYLES
   ===================================================== */

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

:root {
    --color-primary: #020202;
    --color-secondary: #1a1a1a;
    --color-accent: #ffffff;
    --color-text: #e0e0e0;
    --color-text-dim: #909090;
    --color-border: #2a2a2a;
    --color-glow: rgba(255, 255, 255, 0.1);
    
    --font-display: 'Arial', 'Helvetica Neue', sans-serif;
    --font-body: 'Arial', 'Helvetica Neue', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --transition-fast: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 1.2s cubic-bezier(0.4, 0, 0.2, 1);
    
    --z-background: -1;
    --z-content: 1;
    --z-nav: 100;
    --z-modal: 1000;
    --z-loading: 10000;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-primary);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Respect users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}

body.modal-open {
    overflow: hidden;
}

/* =====================================================
   CUSTOM SCROLLBAR
   ===================================================== */

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

/* Webkit browsers (Chrome, Safari, Edge) */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.35);
}

::-webkit-scrollbar-thumb:active {
    background: rgba(255, 255, 255, 0.5);
}

/* Modal scrollbar (slightly more prominent) */
.modal-container::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.25);
}

.modal-container::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.4);
}

/* =====================================================
   WEBGL CANVAS BACKGROUND
   ===================================================== */

#webgl-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-background);
    pointer-events: none;
}

/* =====================================================
   LOADING SCREEN
   ===================================================== */

.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-primary);
    z-index: var(--z-loading);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-content {
    display: flex;
    align-items: center;
    justify-content: center;
}

.loading-bar {
    width: 200px;
    height: 1px;
    background-color: var(--color-border);
    position: relative;
    overflow: hidden;
}

.loading-progress {
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background-color: var(--color-accent);
    transition: width 0.3s ease-out;
}

/* =====================================================
   HERO SECTION
   ===================================================== */

.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.hero.active {
    opacity: 1;
}

/* Hero loading preview state */
.hero.loading-preview {
    opacity: 0.3;
    pointer-events: none;
    transition: opacity 0.6s ease;
}

.hero.loading-preview .hero-video-overlay {
    opacity: 0.7;
}

.hero.loading-preview .hero-content,
.hero.loading-preview .scroll-indicator {
    opacity: 0;
}

.hero-content {
    text-align: center;
    max-width: 1400px;
    padding: var(--spacing-md);
    perspective: 1000px;
    position: relative;
    z-index: 2;
}

.hero-subtitle {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.3rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    transform: translateY(20px);
    animation: revealText 1s ease-out 0.5s forwards;
}

.hero-subtitle .separator {
    margin: 0 var(--spacing-sm);
    opacity: 0.3;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 10vw, 8rem);
    font-weight: 300;
    line-height: 1;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-lg);
    transform-style: preserve-3d;
}

.title-line {
    display: block;
    overflow: hidden;
    padding: 0.1em 0;
    will-change: transform;
}

.title-line .word {
    display: inline-block;
    opacity: 0;
    transform: translateY(120%) rotateX(-90deg);
    transform-origin: 50% 100%;
    transition: transform 600ms cubic-bezier(0.22, 1, 0.36, 1),
                text-shadow 400ms ease;
}

/* Animate words only when hero is active */
.hero.active .title-line:nth-child(1) .word {
    animation: slideUpWord 1s cubic-bezier(0.77, 0, 0.175, 1) 0.3s forwards;
}

.hero.active .title-line:nth-child(2) .word {
    animation: slideUpWord 1s cubic-bezier(0.77, 0, 0.175, 1) 0.5s forwards;
}

.hero.active .title-line:nth-child(3) .word {
    animation: slideUpWord 1s cubic-bezier(0.77, 0, 0.175, 1) 0.7s forwards;
}

.hero.active .title-line:nth-child(4) .word {
    animation: slideUpWord 1s cubic-bezier(0.77, 0, 0.175, 1) 0.9s forwards;
}

@keyframes slideUpWord {
    0% {
        opacity: 0;
        transform: translateY(120%) rotateX(-90deg);
    }
    60% {
        opacity: 1;
        transform: translateY(-5%) rotateX(5deg);
    }
    100% {
        opacity: 1;
        transform: translateY(0) rotateX(0deg);
    }
}

/* Dolly-in focusing toward the last line */
@keyframes heroDollyIn {
    0% { transform: translate3d(0, 20px, -120px) scale(0.98); opacity: 0; }
    60% { opacity: 1; }
    100% { transform: translate3d(0, 0, 0) scale(1); opacity: 1; }
}

.hero.active .hero-title {
    animation: heroDollyIn 900ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero.active .title-line:last-child .word {
    text-shadow: 0 8px 24px rgba(0, 255, 200, 0.12);
}

.hero-name {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 300;
    letter-spacing: 0.5rem;
    opacity: 0;
    transform: translateY(20px);
    animation: revealText 1s ease-out 1.8s forwards;
}

@keyframes revealText {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal-text {
    overflow: hidden;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    opacity: 0;
    animation: revealText 1s ease-out 2.2s forwards;
    z-index: 2;
}

.scroll-line {
    width: 2px;
    height: 60px;
    background: linear-gradient(to bottom, transparent, var(--color-accent), transparent);
    animation: scrollLineMove 2s ease-in-out infinite;
}

@keyframes scrollLineMove {
    0%, 100% {
        transform: translateY(-10px);
        opacity: 0;
    }
    50% {
        transform: translateY(10px);
        opacity: 1;
    }
}

.scroll-text {
    font-size: 0.65rem;
    letter-spacing: 0.2rem;
    font-weight: 300;
}

/* =====================================================
   NAVIGATION
   ===================================================== */

/* Hero Background Video */
.hero-video {
    position: absolute;
    inset: 0;
    z-index: 1;
    overflow: hidden;
}

.hero-video-media {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter:grayscale(0.9);
}

.hero-video-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.65) 70%);
    pointer-events: none;
}

.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: var(--z-nav);
    opacity: 0;
    transform: translateY(-20px);
    animation: revealText 1s ease-out 2.5s forwards;
}

.nav-logo {
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-smooth);
}

.nav-logo:hover {
    border-color: var(--color-accent);
    background-color: var(--color-glow);
}

.nav-logo-text {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 300;
    letter-spacing: 0.1rem;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-link {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.2rem;
    color: var(--color-text);
    text-decoration: none;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-accent);
    transition: width var(--transition-fast);
}

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

.nav-link:hover::after {
    width: 100%;
}

.nav-link.active {
    color: var(--color-accent);
}

.nav-link.active::after {
    width: 100%;
}

.contact-btn {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.2rem;
    color: var(--color-accent);
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--color-border);
    transition: all var(--transition-smooth);
    display: inline-block;
}

.contact-btn:hover {
    border-color: var(--color-accent);
    background-color: var(--color-glow);
}

/* =====================================================
   SECTIONS
   ===================================================== */

.section {
    min-height: 100vh;
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.section.in-view .section-header {
    opacity: 1;
    transform: translateY(0);
}

.section-number {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 300;
    letter-spacing: 0.2rem;
    color: var(--color-text-dim);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 300;
    letter-spacing: 0.1rem;
}

/* =====================================================
   PHILOSOPHY SECTION
   ===================================================== */

.philosophy-content {
    display: grid;
    gap: var(--spacing-xl);
}

.philosophy-main {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.philosophy-statement {
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 2.5vw, 2rem);
    font-weight: 300;
    line-height: 1.5;
    max-width: 900px;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--transition-slow) 0.2s, transform var(--transition-slow) 0.2s;
}

.section.in-view .philosophy-statement {
    opacity: 1;
    transform: translateY(0);
}

.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
}

.philosophy-card {
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    transition: all var(--transition-smooth);
    opacity: 0;
    transform: translateY(40px);
}

.section.in-view .philosophy-card:nth-child(1) {
    animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

.section.in-view .philosophy-card:nth-child(2) {
    animation: fadeInUp 0.8s ease-out 0.6s forwards;
}

.section.in-view .philosophy-card:nth-child(3) {
    animation: fadeInUp 0.8s ease-out 0.8s forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.philosophy-card:hover {
    border-color: var(--color-accent);
    background-color: var(--color-glow);
    transform: translateY(-4px);
}

/* Embodied Cognition card: show image on hover */
.philosophy-grid .philosophy-card:nth-child(2) {
    position: relative;
    overflow: hidden;
}

.philosophy-grid .philosophy-card:nth-child(2)::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url('../img/cto_gameplay.jpeg') center center / cover no-repeat;
    opacity: 0;
    transform: scale(1.05);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
    z-index: 1;
    pointer-events: none;
}

.philosophy-grid .philosophy-card:nth-child(2):hover::after {
    opacity: 1;
    transform: scale(1);
}

.philosophy-grid .philosophy-card:nth-child(2) .card-icon,
.philosophy-grid .philosophy-card:nth-child(2) .card-title,
.philosophy-grid .philosophy-card:nth-child(2) .card-description {
    position: relative;
    z-index: 2;
    transition: opacity var(--transition-fast);
}

.philosophy-grid .philosophy-card:nth-child(2):hover .card-icon,
.philosophy-grid .philosophy-card:nth-child(2):hover .card-title,
.philosophy-grid .philosophy-card:nth-child(2):hover .card-description {
    opacity: 0;
}

/* Systems Thinking card: show image on hover */
.philosophy-grid .philosophy-card:nth-child(1) {
    position: relative;
    overflow: hidden;
}

.philosophy-grid .philosophy-card:nth-child(1)::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url('../img/development_data_detectives2.JPG') center center / cover no-repeat;
    opacity: 0;
    transform: scale(1.05);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
    z-index: 1;
    pointer-events: none;
}

.philosophy-grid .philosophy-card:nth-child(1):hover::after {
    opacity: 1;
    transform: scale(1);
}

.philosophy-grid .philosophy-card:nth-child(1) .card-icon,
.philosophy-grid .philosophy-card:nth-child(1) .card-title,
.philosophy-grid .philosophy-card:nth-child(1) .card-description {
    position: relative;
    z-index: 2;
    transition: opacity var(--transition-fast);
}

.philosophy-grid .philosophy-card:nth-child(1):hover .card-icon,
.philosophy-grid .philosophy-card:nth-child(1):hover .card-title,
.philosophy-grid .philosophy-card:nth-child(1):hover .card-description {
    opacity: 0;
}

/* Adaptive Frameworks card: show image on hover */
.philosophy-grid .philosophy-card:nth-child(3) {
    position: relative;
    overflow: hidden;
}

.philosophy-grid .philosophy-card:nth-child(3)::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url('../img/tactical_tea_time.jpg') center center / cover no-repeat;
    opacity: 0;
    transform: scale(1.05);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
    z-index: 1;
    pointer-events: none;
}

.philosophy-grid .philosophy-card:nth-child(3):hover::after {
    opacity: 1;
    transform: scale(1);
}

.philosophy-grid .philosophy-card:nth-child(3) .card-icon,
.philosophy-grid .philosophy-card:nth-child(3) .card-title,
.philosophy-grid .philosophy-card:nth-child(3) .card-description {
    position: relative;
    z-index: 2;
    transition: opacity var(--transition-fast);
}

.philosophy-grid .philosophy-card:nth-child(3):hover .card-icon,
.philosophy-grid .philosophy-card:nth-child(3):hover .card-title,
.philosophy-grid .philosophy-card:nth-child(3):hover .card-description {
    opacity: 0;
}

/* Hover captions for philosophy cards */
.philosophy-grid .philosophy-card:nth-child(1)::before {
    content: 'Immersing participants into realistic processes';
    position: absolute;
    left: 50%;
    bottom: var(--spacing-lg);
    transform: translateX(-50%) translateY(10px);
    opacity: 0;
    padding: 0.5rem 0.75rem;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-family: var(--font-display);
    font-size: 0.8rem;
    letter-spacing: 0.05rem;
    z-index: 2;
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
    pointer-events: none;
}

.philosophy-grid .philosophy-card:nth-child(1):hover::before {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.philosophy-grid .philosophy-card:nth-child(2)::before {
    content: 'Using engagement for meaning making';
    position: absolute;
    left: 50%;
    bottom: var(--spacing-lg);
    transform: translateX(-50%) translateY(10px);
    opacity: 0;
    padding: 0.5rem 0.75rem;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-family: var(--font-display);
    font-size: 0.8rem;
    letter-spacing: 0.05rem;
    z-index: 2;
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
    pointer-events: none;
}

.philosophy-grid .philosophy-card:nth-child(2):hover::before {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.philosophy-grid .philosophy-card:nth-child(3)::before {
    content: 'Building coherent feedback mechanisms';
    position: absolute;
    left: 50%;
    bottom: var(--spacing-lg);
    transform: translateX(-50%) translateY(10px);
    opacity: 0;
    padding: 0.5rem 0.75rem;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-family: var(--font-display);
    font-size: 0.8rem;
    letter-spacing: 0.05rem;
    z-index: 2;
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
    pointer-events: none;
}

.philosophy-grid .philosophy-card:nth-child(3):hover::before {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-md);
    opacity: 0.7;
}

.card-icon svg {
    width: 100%;
    height: 100%;
}

.card-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 300;
    letter-spacing: 0.2rem;
    margin-bottom: var(--spacing-sm);
}

.card-description {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--color-text-dim);
}

/* =====================================================
   PROJECTS SECTION
   ===================================================== */

.projects-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.project-category {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.section.in-view .project-category:nth-child(1) {
    animation: fadeInUp 0.8s ease-out 0.2s forwards;
}

.section.in-view .project-category:nth-child(2) {
    animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

.section.in-view .project-category:nth-child(3) {
    animation: fadeInUp 0.8s ease-out 0.6s forwards;
}

.section.in-view .project-category:nth-child(4) {
    animation: fadeInUp 0.8s ease-out 0.8s forwards;
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-md);
}

.category-title {
    font-family: var(--font-display);
    font-size: clamp(1rem, 2vw, 1.5rem);
    font-weight: 300;
    letter-spacing: 0.2rem;
}

.category-count {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 300;
    color: var(--color-text-dim);
}

.category-projects {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    border: 1px solid var(--color-border);
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-smooth);
}

.project-card:hover {
    border-color: var(--color-accent);
    background-color: var(--color-glow);
    transform: translateY(-4px);
}

.project-card-inner {
    padding: var(--spacing-lg);
}

.project-number {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.2rem;
    color: var(--color-text-dim);
    margin-bottom: var(--spacing-sm);
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.1rem;
    margin-bottom: var(--spacing-xs);
}

.project-subtitle {
    font-size: 0.9rem;
    color: var(--color-text-dim);
    margin-bottom: var(--spacing-md);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    font-size: 0.65rem;
    letter-spacing: 0.1rem;
    padding: 0.25rem 0.75rem;
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.project-card:hover .tag {
    border-color: var(--color-accent);
}

/* =====================================================
   ABOUT SECTION
   ===================================================== */

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    align-items: start;
    opacity: 0;
    transition: opacity var(--transition-slow) 0.15s;
}

.about-visual {
    position: sticky;
    top: 120px;
}

.about-image-container {
    aspect-ratio: 3 / 4;
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
    opacity: 0;
    transform: translateY(40px);
}

.section.in-view .about-image-container {
    animation: fadeInUp 1s ease-out 0.3s forwards;
}

.section.in-view .about-content {
    opacity: 1;
}

.image-reveal {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-primary);
    transform-origin: bottom;
}

.section.in-view .image-reveal {
    animation: revealImage 1.4s cubic-bezier(0.77, 0, 0.175, 1) 0.5s forwards;
}

@keyframes revealImage {
    to {
        transform: scaleY(0);
    }
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 50%, rgba(10, 10, 10, 0.8) 100%);
    pointer-events: none;
}

.about-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.about-intro {
    opacity: 0;
    transform: translateY(40px);
}

.section.in-view .about-intro {
    animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

.about-statement {
    font-family: var(--font-display);
    font-size: clamp(1rem, 1.8vw, 1.5rem);
    font-weight: 300;
    line-height: 1.6;
}

.about-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.detail-block {
    border-left: 1px solid var(--color-border);
    padding-left: var(--spacing-md);
    opacity: 0;
    transform: translateY(40px);
}

.section.in-view .detail-block:nth-child(1) {
    animation: fadeInUp 0.8s ease-out 0.5s forwards;
}

.section.in-view .detail-block:nth-child(2) {
    animation: fadeInUp 0.8s ease-out 0.6s forwards;
}

.section.in-view .detail-block:nth-child(3) {
    animation: fadeInUp 0.8s ease-out 0.7s forwards;
}

.section.in-view .detail-block:nth-child(4) {
    animation: fadeInUp 0.8s ease-out 0.8s forwards;
}

.detail-title {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-dim);
}

.detail-text {
    font-size: 0.9rem;
    line-height: 1.6;
}

.about-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    opacity: 0;
    transform: translateY(40px);
}

.section.in-view .about-links {
    animation: fadeInUp 0.8s ease-out 0.9s forwards;
}

.about-link {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.2rem;
    color: var(--color-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--color-border);
    transition: all var(--transition-smooth);
}

.about-link svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.about-link:hover {
    border-color: var(--color-accent);
    background-color: var(--color-glow);
}

.about-link:hover svg {
    transform: translate(2px, -2px);
}

/* =====================================================
   PROJECT MODAL
   ===================================================== */

.project-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-smooth), visibility var(--transition-smooth);
}

.project-modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
}

.modal-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow-y: auto;
    padding: var(--spacing-xl);
    transform: translateY(40px);
    transition: transform var(--transition-smooth);
}

.project-modal.active .modal-container {
    transform: translateY(0);
}

.modal-close {
    position: fixed;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 48px;
    height: 48px;
    background: transparent;
    border: 1px solid var(--color-border);
    cursor: pointer;
    z-index: 1;
    transition: all var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    border-color: var(--color-accent);
    background-color: var(--color-glow);
    transform: rotate(90deg);
}

.close-line {
    position: absolute;
    width: 20px;
    height: 1px;
    background-color: var(--color-accent);
}

.close-line:first-child {
    transform: rotate(45deg);
}

.close-line:last-child {
    transform: rotate(-45deg);
}

.modal-content {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: var(--spacing-xl);
}

.modal-header {
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--spacing-lg);
}

.modal-number {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 300;
    letter-spacing: 0.2rem;
    color: var(--color-text-dim);
    display: block;
    margin-bottom: var(--spacing-sm);
}

.modal-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 300;
    letter-spacing: 0.1rem;
    margin-bottom: var(--spacing-sm);
}

.modal-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-dim);
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.modal-section {
    border-left: 1px solid var(--color-border);
    padding-left: var(--spacing-lg);
}

.modal-section-title {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 300;
    letter-spacing: 0.2rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-dim);
}

.visual-demo-content,
.learning-model-content,
.narrative-content,
.technical-details-content {
    font-size: 0.95rem;
    line-height: 1.8;
}

.visual-demo-content img,
.visual-demo-content video {
    width: 100%;
    border: 1px solid var(--color-border);
    margin-top: var(--spacing-md);
}

.learning-model-content ul,
.technical-details-content ul {
    list-style: none;
    padding-left: var(--spacing-md);
}

.learning-model-content li,
.technical-details-content li {
    position: relative;
    margin-bottom: var(--spacing-sm);
}

.learning-model-content li::before,
.technical-details-content li::before {
    content: '—';
    position: absolute;
    left: calc(-1 * var(--spacing-md));
    color: var(--color-text-dim);
}

.modal-footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.modal-link {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.2rem;
    color: var(--color-text);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--color-border);
    transition: all var(--transition-smooth);
}

.modal-link svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.modal-link:hover {
    border-color: var(--color-accent);
    background-color: var(--color-glow);
}

.modal-link:hover svg {
    transform: translate(2px, -2px);
}

/* =====================================================
   FOOTER
   ===================================================== */

.footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-text,
.footer-tagline {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.2rem;
}

.footer-tagline {
    color: var(--color-text-dim);
}

/* =====================================================
   RESPONSIVE DESIGN
   ===================================================== */

@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-visual {
        position: relative;
        top: 0;
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-sm: 0.75rem;
        --spacing-md: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .main-nav {
        flex-direction: column;
        gap: var(--spacing-md);
        padding: var(--spacing-sm);
    }
    
    .nav-links {
        gap: var(--spacing-md);
    }
    
    .hero-subtitle,
    .hero-name {
        font-size: 0.65rem;
        letter-spacing: 0.2rem;
    }
    
    .category-projects {
        grid-template-columns: 1fr;
    }

    .project-card-inner {
        padding: var(--spacing-md);
    }

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

    .project-subtitle {
        font-size: 0.85rem;
    }
    
    .philosophy-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-container {
        padding: var(--spacing-md);
    }
    
    .modal-close {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
        width: 44px;
        height: 44px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .loading-bar { width: 160px; }
    
    .nav-links {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: center;
    }
    
    .section {
        padding: var(--spacing-lg) 0;
    }
    
    .modal-section {
        padding-left: var(--spacing-md);
    }

    .contact-btn,
    .about-link,
    .modal-link {
        padding: 0.75rem 1rem;
        font-size: 0.7rem;
        letter-spacing: 0.15rem;
    }

    .hero-title {
        font-size: clamp(2rem, 12vw, 3.2rem);
        letter-spacing: -0.01em;
    }
}

/* Improve tap targets globally */
.about-link,
.contact-btn,
.modal-link {
    min-height: 44px;
}

/* Prevent sticky image on short mobile viewports */
@media (max-height: 700px) and (max-width: 768px) {
    .about-visual { position: relative; top: 0; }
}

/* Reduce blur and overlays for performance on mobile */
@media (max-width: 768px) {
    .modal-overlay { backdrop-filter: none; }
    .hero-video-media { filter: grayscale(0.8); }
}
}

/* =====================================================
   UTILITY CLASSES
   ===================================================== */

.hidden {
    display: none !important;
}

.no-scroll {
    overflow: hidden;
}