/* STEELLIFE - Heatherwick Studio Style */
/* Minimalist, fullscreen project grid design */

/* =====================================================
   CSS Variables
   ===================================================== */
:root {
    --bg-primary: #000000;
    --bg-secondary: #111111;
    --text-primary: #ffffff;
    --text-secondary: #888888;
    --text-muted: #555555;
    --accent: #ffffff;
    --overlay-bg: rgba(0, 0, 0, 0.95);
    --transition-fast: 0.2s;
    --transition-normal: 0.4s;
    --transition-slow: 0.6s;
}

/* =====================================================
   Loading Overlay
   ===================================================== */
.loading-overlay {
    position: fixed;
    inset: 0;
    z-index: 10005;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-logo {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--text-primary);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 0.4;
    }

    50% {
        opacity: 1;
    }
}

/* =====================================================
   Custom Cursor
   ===================================================== */
.custom-cursor {
    position: fixed;
    width: 80px;
    height: 80px;
    border: 1px solid var(--text-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    z-index: 10006;
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.5);
    transition: opacity 0.3s ease, transform 0.3s ease;
    mix-blend-mode: difference;
}

.custom-cursor.active {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.custom-cursor span {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* Hide default cursor on project grid */
.project-grid {
    cursor: none;
}

.project-item {
    cursor: none;
}

/* =====================================================
   Project Modal (Gallery)
   ===================================================== */
.project-modal {
    position: fixed;
    inset: 0;
    z-index: 10003;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
    overflow: hidden;
}

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

.modal-close {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-size: 2rem;
    color: var(--text-primary);
    background: none;
    border: none;
    cursor: pointer;
    z-index: 10004;
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 0.7;
}

.modal-close:hover {
    transform: rotate(90deg);
    opacity: 1;
}

/* Gallery Navigation Arrows */
.gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 3rem;
    color: var(--text-primary);
    background: none;
    border: none;
    cursor: pointer;
    z-index: 10004;
    padding: 1rem;
    opacity: 0.5;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.gallery-nav:hover {
    opacity: 1;
}

.gallery-prev {
    left: 2rem;
}

.gallery-prev:hover {
    transform: translateY(-50%) translateX(-5px);
}

.gallery-next {
    right: 2rem;
}

.gallery-next:hover {
    transform: translateY(-50%) translateX(5px);
}

.modal-content {
    width: 90%;
    max-width: 1200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    transform: translateY(30px);
    transition: transform 0.5s ease;
}

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

/* Gallery Container */
.gallery-container {
    width: 100%;
    height: 60vh;
    position: relative;
    overflow: hidden;
}

.gallery-item {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.gallery-item.active {
    opacity: 1;
}

.gallery-item img,
.gallery-item video {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* Gallery Dots */
.gallery-dots {
    display: flex;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.gallery-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    border: none;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.3s ease;
}

.gallery-dot:hover {
    background: var(--text-secondary);
}

.gallery-dot.active {
    background: var(--text-primary);
    transform: scale(1.3);
}

.modal-info {
    text-align: center;
    margin-top: 1.5rem;
    max-width: 800px;
}

.modal-info h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.modal-info p {
    font-size: 1rem;
    color: var(--text-secondary);
}

.modal-description {
    margin-top: 1rem;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-muted);
}

/* Modal Tabs */
.modal-tabs {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

.modal-tab {
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    background: none;
    border: none;
    padding: 0.5rem 0;
    cursor: pointer;
    position: relative;
    transition: color var(--transition-fast);
}

.modal-tab::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--text-primary);
    transition: width var(--transition-fast);
}

.modal-tab:hover {
    color: var(--text-secondary);
}

.modal-tab.active {
    color: var(--text-primary);
}

.modal-tab.active::after {
    width: 100%;
}

/* Tab Content */
.modal-tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

/* Details Grid */
.details-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem 3rem;
    text-align: left;
    margin-top: 1rem;
}

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

.detail-label {
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    text-transform: uppercase;
}

.detail-value {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.detail-value.collaborators {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Responsive Details */
@media (max-width: 600px) {
    .details-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .modal-tabs {
        gap: 1rem;
    }
}

/* =====================================================
   Reset & Base
   ===================================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

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

/* =====================================================
   Header
   ===================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10002;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem;
    background: var(--bg-primary);
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--text-primary);
    z-index: 101;
}

.nav-links {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.menu-btn {
    width: 30px;
    height: 20px;
    position: relative;
    z-index: 101;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-normal);
    transform-origin: center;
}

.menu-btn.active span:first-child {
    transform: translateY(9px) rotate(45deg);
}

.menu-btn.active span:last-child {
    transform: translateY(-9px) rotate(-45deg);
}

/* =====================================================
   Category Bar
   ===================================================== */
.category-bar {
    position: fixed;
    top: 4.875rem;
    left: 0;
    right: 0;
    z-index: 10000;
    display: flex;
    gap: 1rem;
    padding: 0.5rem 2rem 1rem 2rem;
    background: var(--bg-primary);
}

.category-btn {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    border: 1px solid transparent;
    transition: all var(--transition-fast);
}

.category-btn:hover {
    color: var(--text-secondary);
}

.category-btn.active {
    color: var(--text-primary);
    border-color: var(--text-primary);
}

/* =====================================================
   Hero Section
   ===================================================== */
.hero-section {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    display: flex;
}

.hero-section::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.15);
    z-index: 2;
    pointer-events: none;
}

.video-container {
    position: relative;
    flex: 1;
    height: 100%;
    overflow: hidden;
}

.video-container.left {
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    animation: bounce 2s infinite;
    mix-blend-mode: difference;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    40% {
        transform: translateX(-50%) translateY(-10px);
    }

    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Intro Overlay */
.intro-overlay {
    position: absolute;
    inset: 0;
    z-index: 50;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 1.2s ease, visibility 1.2s ease;
}

.intro-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

.intro-text {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: 0.3em;
    color: var(--text-primary);
    text-transform: uppercase;
    animation: introFade 2.5s ease-in-out forwards;
}

@keyframes introFade {
    0% {
        opacity: 0;
        transform: scale(0.9);
    }

    30% {
        opacity: 1;
        transform: scale(1);
    }

    70% {
        opacity: 1;
        transform: scale(1);
    }

    100% {
        opacity: 0;
        transform: scale(1.05);
    }
}

/* Video Labels */
.video-label {
    position: absolute;
    bottom: 50%;
    left: 50%;
    transform: translate(-50%, 50%);
    z-index: 10;
    font-size: 3rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    color: var(--text-primary);
    text-transform: uppercase;
    opacity: 0;
    transition: opacity 0.5s ease, transform 0.5s ease;
    mix-blend-mode: difference;
}

.video-container:hover .video-label {
    opacity: 1;
    transform: translate(-50%, 50%) scale(1.05);
}

/* Clickable video containers */
.video-container {
    cursor: pointer;
}

/* =====================================================
   Project Grid - Fullscreen Layout
   ===================================================== */
.project-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    min-height: 100vh;
    padding-top: 8rem;
}

.project-item {
    position: relative;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    cursor: pointer;
}

.project-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-item:hover img {
    transform: scale(1.05);
}

.project-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.5rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.project-item:hover .project-overlay {
    opacity: 1;
}

.project-overlay h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    transform: translateY(10px);
    transition: transform var(--transition-normal);
}

.project-overlay p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    transform: translateY(10px);
    transition: transform var(--transition-normal) 0.05s;
}

.project-item:hover .project-overlay h2,
.project-item:hover .project-overlay p {
    transform: translateY(0);
}

/* Hidden state for filtered items */
.project-item.hidden {
    display: none;
}

/* =====================================================
   Navigation Overlay
   ===================================================== */
.nav-overlay {
    position: fixed;
    inset: 0;
    z-index: 10001;
    background: var(--overlay-bg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

.nav-overlay-content {
    display: flex;
    gap: 6rem;
    text-align: left;
}

.nav-section h3 {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.nav-section ul {
    list-style: none;
}

.nav-section li {
    margin-bottom: 0.75rem;
}

.nav-section a {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.nav-section a:hover {
    color: var(--text-secondary);
}

.nav-contact p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.nav-contact a {
    font-size: 0.875rem;
}

.nav-close {
    position: absolute;
    bottom: 3rem;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

/* =====================================================
   Studio Section
   ===================================================== */
.studio-section {
    display: none;
    min-height: 100vh;
    padding: 8rem 2rem 4rem;
    background: var(--bg-primary);
}

.studio-section.active {
    display: block;
}

.studio-content {
    max-width: 1200px;
    margin: 0 auto;
}

.studio-intro {
    max-width: 800px;
    margin-bottom: 4rem;
}

.studio-intro h1 {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 2rem;
}

.studio-intro .lead {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.studio-intro p {
    color: var(--text-muted);
    line-height: 1.8;
}

.studio-stats {
    display: flex;
    gap: 4rem;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 3rem;
    font-weight: 600;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* =====================================================
   Contact Section
   ===================================================== */
.contact-section {
    display: none;
    min-height: 100vh;
    padding: 6rem 2rem;
    background: var(--bg-secondary);
}

.contact-section.active {
    display: block;
}

.contact-content {
    max-width: 1200px;
    margin: 0 auto;
}

.contact-content h2 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 3rem;
}

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

.contact-info h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.contact-info a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.contact-info a:hover {
    color: var(--text-primary);
}

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

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    color: var(--text-primary);
    background: transparent;
    border: 1px solid var(--text-muted);
    transition: border-color var(--transition-fast);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-muted);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--text-primary);
}

.contact-form button {
    padding: 1rem 2rem;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--bg-primary);
    background: var(--text-primary);
    transition: all var(--transition-fast);
    align-self: flex-start;
}

.contact-form button:hover {
    background: var(--text-secondary);
}

/* =====================================================
   Footer
   ===================================================== */
.footer {
    padding: 2rem;
    background: var(--bg-primary);
    border-top: 1px solid var(--text-muted);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-logo {
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.footer-copyright {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* =====================================================
   Responsive - Tablet
   ===================================================== */
@media (max-width: 1024px) {
    .project-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .nav-overlay-content {
        flex-direction: column;
        gap: 3rem;
        text-align: center;
    }

    .studio-stats {
        flex-wrap: wrap;
        gap: 2rem;
    }
}

/* =====================================================
   Responsive - Mobile
   ===================================================== */
@media (max-width: 768px) {
    .hero-section {
        flex-direction: column;
    }

    .video-container.left {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .header {
        padding: 1rem 1.5rem;
    }

    .nav-links {
        display: none;
    }

    .category-bar {
        display: none;
    }

    .project-grid {
        grid-template-columns: repeat(2, 1fr);
        padding-top: 7rem;
    }

    .project-overlay {
        opacity: 1;
        background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 60%);
    }

    .project-overlay h2 {
        font-size: 0.875rem;
        transform: translateY(0);
    }

    .project-overlay p {
        font-size: 0.625rem;
        transform: translateY(0);
    }

    .nav-section a {
        font-size: 1.25rem;
    }

    .studio-intro h1 {
        font-size: 2rem;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* =====================================================
   Responsive - Small Mobile
   ===================================================== */
@media (max-width: 480px) {
    .project-grid {
        grid-template-columns: 1fr;
    }

    .project-item {
        aspect-ratio: 4 / 3;
    }

    .stat-number {
        font-size: 2rem;
    }
}

/* =====================================================
   Animations
   ===================================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.project-item {
    animation: fadeIn 0.6s ease-out forwards;
}

.project-item:nth-child(1) {
    animation-delay: 0.05s;
}

.project-item:nth-child(2) {
    animation-delay: 0.1s;
}

.project-item:nth-child(3) {
    animation-delay: 0.15s;
}

.project-item:nth-child(4) {
    animation-delay: 0.2s;
}

.project-item:nth-child(5) {
    animation-delay: 0.25s;
}

.project-item:nth-child(6) {
    animation-delay: 0.3s;
}

.project-item:nth-child(7) {
    animation-delay: 0.35s;
}

.project-item:nth-child(8) {
    animation-delay: 0.4s;
}

.project-item:nth-child(9) {
    animation-delay: 0.45s;
}

.project-item:nth-child(10) {
    animation-delay: 0.5s;
}

.project-item:nth-child(11) {
    animation-delay: 0.55s;
}

.project-item:nth-child(12) {
    animation-delay: 0.6s;
}

.project-item:nth-child(13) {
    animation-delay: 0.65s;
}

.project-item:nth-child(14) {
    animation-delay: 0.7s;
}

.project-item:nth-child(15) {
    animation-delay: 0.75s;
}

.project-item:nth-child(16) {
    animation-delay: 0.8s;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}