/* =============================================
   Art Growth Limited - Main Stylesheet
   Premium Corporate Art Consultancy Website
   ============================================= */

/* =============================================
   Image Carousel
   ============================================= */
.carousel-section {
    background: var(--color-background-alt);
}

.carousel {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.carousel__track {
    display: flex;
    transition: transform 0.5s ease-in-out;
    touch-action: pan-y pinch-zoom;
}

.carousel__slide {
    min-width: 100%;
    position: relative;
}

.carousel__slide img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    display: block;
}

.carousel__btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-md);
    z-index: 10;
}

.carousel__btn:hover {
    background: var(--color-accent);
    color: white;
}

.carousel__btn svg {
    width: 24px;
    height: 24px;
}

.carousel__btn--prev {
    left: 16px;
}

.carousel__btn--next {
    right: 16px;
}

.carousel__dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.carousel__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: none;
    cursor: pointer;
    transition: var(--transition-fast);
}

.carousel__dot:hover,
.carousel__dot--active {
    background: var(--color-accent);
}

@media (max-width: 768px) {
    .carousel__slide img {
        height: 300px;
    }
    
    .carousel__btn {
        width: 40px;
        height: 40px;
    }
    
    .carousel__btn--prev {
        left: 8px;
    }
    
    .carousel__btn--next {
        right: 8px;
    }
}

/* CSS Custom Properties (Variables) */
:root {
    /* Color Palette - Clean, Minimal, Modern */
    --color-primary: #1a1a1a;
    --color-secondary: #2d2d2d;
    --color-accent: #1a1a1a;
    --color-accent-hover: #333333;
    --color-text-dark: #1a1a1a;
    --color-text-medium: #4a4a4a;
    --color-text-light: #6a6a6a;
    --color-background: #ffffff;
    --color-background-alt: #f8f8f8;
    --color-background-dark: #1a1a1a;
    --color-border: #e0e0e0;
    --color-border-light: #f0f0f0;
    
    /* Typography */
    --font-primary: 'Playfair Display', Georgia, serif;
    --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing Scale */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    --spacing-4xl: 8rem;
    
    /* Layout */
    --max-width: 1200px;
    --max-width-narrow: 800px;
    --header-height: 80px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-secondary);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-dark);
    background-color: var(--color-background);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.02em;
}

.hero__company {
     font-family: var(--font-secondary);
     font-size: 1.25rem;
     font-weight: 500;
     color: var(--color-primary);
     margin-bottom: var(--spacing-md);
     margin-top: -1rem;
     letter-spacing: 0.01em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-medium);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent-hover);
}

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

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container--narrow {
    max-width: var(--max-width-narrow);
}

/* =============================================
   Header & Navigation
   ============================================= */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: box-shadow var(--transition-medium);
}

.header--scrolled {
    box-shadow: var(--shadow-md);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo__image {
    height: 45px;
    width: auto;
}

.logo__text {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.logo__tagline {
    font-size: 0.75rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Navigation */
.nav {
    display: flex;
    align-items: center;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    list-style: none;
}

.nav__link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-dark);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-medium);
}

.nav__link:hover,
.nav__link--active {
    color: var(--color-primary);
}

.nav__link:hover::after,
.nav__link--active::after {
    width: 100%;
}

.nav__link:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: 2px;
}

/* Mobile Menu Toggle */
.nav__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav__toggle span {
    width: 100%;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition-fast);
}

/* =============================================
   Hero Section
   ============================================= */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--header-height) + var(--spacing-3xl)) var(--spacing-lg) var(--spacing-3xl);
    background: linear-gradient(165deg, #f8f9fa 0%, #e8e9eb 50%, #f0f1f3 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(201, 169, 98, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(26, 26, 46, 0.05) 0%, transparent 50%),
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="%23c9a96215"/></svg>');
    background-size: 100% 100%, 100% 100%, 50px 50px;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(to top, var(--color-background) 0%, transparent 100%);
    pointer-events: none;
}

.hero__content {
    position: relative;
    text-align: center;
    max-width: 900px;
    z-index: 1;
}

.hero__badge {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    border-radius: 50px;
    margin-bottom: var(--spacing-xl);
    box-shadow: 0 4px 15px rgba(201, 169, 98, 0.3);
}

.hero__title {
    margin-bottom: var(--spacing-xl);
    color: var(--color-primary);
    font-weight: 700;
    letter-spacing: -0.03em;
}

.hero__title span {
    color: var(--color-accent);
    position: relative;
}

.hero__title span::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 0;
    right: 0;
    height: 12px;
    background: rgba(201, 169, 98, 0.2);
    z-index: -1;
}

.hero__subtitle {
    font-size: 1.35rem;
    color: var(--color-text-medium);
    max-width: 720px;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.9;
    font-weight: 400;
}

.hero__cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    font-family: var(--font-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border: 2px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-medium);
    text-decoration: none;
    outline: none;
}

.btn:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 3px;
}

.btn--primary {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(26, 26, 46, 0.15);
}

.btn--primary:hover {
    background: var(--color-secondary);
    border-color: var(--color-secondary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 26, 46, 0.2);
}

.btn--secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn--secondary:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

.btn--secondary.btn--light {
    color: white;
    border-color: rgba(255, 255, 255, 0.8);
}

.btn--secondary.btn--light:hover {
    background: white;
    color: var(--color-primary);
    border-color: white;
}

.btn--accent {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(26, 26, 46, 0.15);
}

.btn--accent:hover {
    background: var(--color-secondary);
    border-color: var(--color-secondary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 26, 46, 0.2);
}

/* =============================================
   Sections
   ============================================= */
.section {
    padding: var(--spacing-4xl) 0;
}

.section--alt {
    background: var(--color-background-alt);
}

.section--dark {
    background: var(--color-background-dark);
    color: white;
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
    color: white;
}

.section--dark p {
    color: rgba(255, 255, 255, 0.85);
}

.section__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section__header h2 {
    margin-bottom: var(--spacing-md);
}

.section__header p {
    color: var(--color-text-medium);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 0;
}

.section__subtitle {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

/* =============================================
   About Section
   ============================================= */
.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about__image {
    position: relative;
}

.about__image img {
    border-radius: 8px;
    box-shadow: var(--shadow-xl);
}

.about__image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: 100%;
    height: 100%;
    border: 3px solid var(--color-accent);
    border-radius: 8px;
    z-index: -1;
}

.about__content h2 {
    margin-bottom: var(--spacing-lg);
}

.about__content p {
    margin-bottom: var(--spacing-md);
}

/* =============================================
   Features Section
   ============================================= */
.features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-medium);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
    border-color: transparent;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card__icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    border-radius: 12px;
    margin-bottom: var(--spacing-md);
}

.feature-card__icon svg {
    width: 26px;
    height: 26px;
    fill: white;
}

.feature-card h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.feature-card p {
    font-size: 0.9rem;
    margin-bottom: 0;
    line-height: 1.7;
    color: var(--color-text-medium);
}

/* =============================================
   Services Section
   ============================================= */
.services__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.service-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--color-accent);
    transition: all var(--transition-medium);
}

.service-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(8px);
}

.service-item__number {
    font-family: var(--font-primary);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
}

.service-item__content h4 {
    margin-bottom: var(--spacing-xs);
}

.service-item__content p {
    margin-bottom: 0;
}

/* =============================================
   Stats Section
   ============================================= */
.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-lg);
}

.stat-item__number {
    font-family: var(--font-primary);
    font-size: 3.5rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-item__label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.8);
}

/* =============================================
   Awards / Recognition Section
   ============================================= */
.awards__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.award-card {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-medium);
}

.award-card:hover {
    box-shadow: var(--shadow-md);
}

.award-card__icon {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-background-alt);
    border-radius: 50%;
}

.award-card__icon svg {
    width: 40px;
    height: 40px;
    fill: var(--color-accent);
}

.award-card__content h4 {
    margin-bottom: var(--spacing-xs);
}

.award-card__content p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* =============================================
   CTA Section
   ============================================= */
.cta {
    text-align: center;
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
}

.cta h2 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.cta p {
    color: rgba(255, 255, 255, 0.85);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
    font-size: 1.05rem;
    line-height: 1.8;
}

.cta__buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* =============================================
   Footer
   ============================================= */
.footer {
    background: var(--color-primary);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
}

.footer__brand p {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
}

.footer h5 {
    color: white;
    font-family: var(--font-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-lg);
}

.footer__links {
    list-style: none;
}

.footer__links li {
    margin-bottom: var(--spacing-sm);
}

.footer__links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.footer__links a:hover {
    color: white;
    padding-left: 4px;
}

.footer__bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.footer__social {
    display: flex;
    gap: var(--spacing-md);
}

.footer__social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.footer__social a:hover {
    background: var(--color-accent);
}

.footer__social svg {
    width: 18px;
    height: 18px;
    fill: white;
}

/* =============================================
   Page Headers
   ============================================= */
.page-header {
    padding: calc(var(--header-height) + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: linear-gradient(165deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 70%, rgba(201, 169, 98, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.page-header h1 {
    color: white;
    margin-bottom: var(--spacing-md);
    position: relative;
}

.page-header p {
    color: rgba(255, 255, 255, 0.85);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.15rem;
    position: relative;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.75);
    transition: color var(--transition-fast);
}

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

.breadcrumb span {
    color: rgba(255, 255, 255, 0.5);
}

/* =============================================
   Contact Form
   ============================================= */
.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact__info {
    padding-right: var(--spacing-xl);
}

.contact__info h3 {
    margin-bottom: var(--spacing-lg);
}

.contact__details {
    margin-top: var(--spacing-xl);
}

.contact__item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact__item-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-background-alt);
    border-radius: 10px;
    border: 1px solid var(--color-border-light);
}

.contact__item-icon svg {
    width: 22px;
    height: 22px;
    stroke: var(--color-primary);
}

.contact__item h5 {
    font-family: var(--font-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.contact__item p {
    margin-bottom: 0;
    color: var(--color-text-dark);
}

.form {
    background: white;
    padding: var(--spacing-xl);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--color-border-light);
}

.form__group {
    margin-bottom: var(--spacing-lg);
}

.form__label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-xs);
}

.form__input,
.form__select,
.form__textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    font-family: var(--font-secondary);
    font-size: 1rem;
    color: var(--color-text-dark);
    background: var(--color-background-alt);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(26, 26, 46, 0.08);
}

.form__input::placeholder,
.form__textarea::placeholder {
    color: var(--color-text-light);
}

.form__textarea {
    min-height: 150px;
    resize: vertical;
}

/* =============================================
   Gallery Page
   ============================================= */
.gallery__filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.gallery__filter {
    padding: var(--spacing-sm) var(--spacing-xl);
    font-family: var(--font-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-medium);
    background: white;
    border: 2px solid var(--color-border);
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.gallery__filter:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.gallery__filter--active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.gallery__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.gallery__item {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    border-radius: 12px;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

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

.gallery__item:hover img {
    transform: scale(1.08);
}

.gallery__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(26, 26, 46, 0.9) 0%, rgba(26, 26, 46, 0.2) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--spacing-lg);
    opacity: 0;
    transition: opacity var(--transition-medium);
}

.gallery__item:hover .gallery__overlay {
    opacity: 1;
}

.gallery__overlay h4 {
    color: white;
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.gallery__overlay p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.85rem;
    margin-bottom: 0;
}

/* Gallery Large Items */
.gallery__item--large {
    grid-column: span 2;
    grid-row: span 2;
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-medium);
}

.lightbox--active {
    opacity: 1;
    visibility: visible;
}

.lightbox__content {
    max-width: 90%;
    max-height: 90vh;
}

.lightbox__content img {
    max-width: 100%;
    max-height: 85vh;
    object-fit: contain;
}

.lightbox__close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.lightbox__close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.lightbox__close svg {
    width: 24px;
    height: 24px;
    fill: white;
}

.lightbox__nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.lightbox__nav:hover {
    background: rgba(255, 255, 255, 0.2);
}

.lightbox__nav--prev {
    left: var(--spacing-lg);
}

.lightbox__nav--next {
    right: var(--spacing-lg);
}

.lightbox__nav svg {
    width: 24px;
    height: 24px;
    fill: white;
}

.lightbox__caption {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: white;
}

.lightbox__caption h4 {
    color: white;
    margin-bottom: var(--spacing-xs);
}

.lightbox__caption p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0;
}

/* =============================================
   Founders Page
   ============================================= */
.founders__intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-3xl);
}

.founders__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-2xl);
}

.founder-card {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
    transition: all var(--transition-medium);
    border: 1px solid var(--color-border-light);
    align-items: start;
}

.founder-card:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
    transform: translateY(-6px);
    border-color: transparent;
}

.founder-card__image {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
}

.founder-card__image img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.founder-card:hover .founder-card__image img {
    transform: scale(1.05);
}

.founder-card__content {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.founder-card__name {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xs);
}

.founder-card__role {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.founder-card__bio {
    font-size: 0.95rem;
    line-height: 1.8;
}

.founder-card__social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.founder-card__social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-background-alt);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.founder-card__social a:hover {
    background: var(--color-accent);
}

.founder-card__social svg {
    width: 18px;
    height: 18px;
    fill: var(--color-text-medium);
    transition: fill var(--transition-fast);
}

.founder-card__social a:hover svg {
    fill: white;
}

/* Full Width Founder Card */
.founder-card--full {
    grid-column: span 2;
    grid-template-columns: 320px 1fr;
}

/* =============================================
   Interactive Founders Showcase
   ============================================= */
.founders-interactive {
    background: var(--color-background-alt);
}

.founders-showcase {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-3xl);
    align-items: start;
    max-width: 1000px;
    margin: 0 auto;
    min-height: 450px;
}

.founders-showcase__images {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
}

.founder-avatar {
    position: relative;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-medium);
    border: 4px solid var(--color-border-light);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.founder-avatar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(201, 169, 98, 0) 0%, rgba(201, 169, 98, 0.3) 100%);
    opacity: 0;
    transition: opacity var(--transition-medium);
    z-index: 1;
}

.founder-avatar:hover,
.founder-avatar.active {
    transform: scale(1.08);
    border-color: var(--color-accent);
    box-shadow: 0 8px 30px rgba(201, 169, 98, 0.25);
}

.founder-avatar:hover::before,
.founder-avatar.active::before {
    opacity: 1;
}

.founder-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-medium);
}

.founder-avatar:hover img {
    transform: scale(1.1);
}

.founder-avatar__label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-sm);
    background: linear-gradient(to top, rgba(26, 26, 46, 0.9) 0%, transparent 100%);
    text-align: center;
    opacity: 0;
    transform: translateY(10px);
    transition: all var(--transition-medium);
    z-index: 2;
    font-family: var(--font-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: white;
}

.founder-avatar:hover .founder-avatar__label {
    opacity: 1;
    transform: translateY(0);
}

/* Founder Info Panel */
.founders-showcase__info {
    position: relative;
    min-height: 350px;
}

.founder-info {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateX(30px);
    transition: all var(--transition-medium);
    padding: var(--spacing-xl);
    background: white;
    border-radius: 16px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--color-border-light);
}

/* Default to showing Dr. Daniel's info */
#founder-daniel {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.founder-info.active {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.founder-info--placeholder {
    display: none !important;
}

.founder-info--placeholder.active {
    display: none !important;
}

.founder-info__empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.founder-info__empty svg {
    width: 60px;
    height: 60px;
    stroke: var(--color-accent);
    opacity: 0.5;
    margin-bottom: var(--spacing-md);
}

.founder-info__empty p {
    color: var(--color-text-light);
    font-style: italic;
    margin: 0;
}

.founder-info__name {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.founder-info__role {
    display: inline-block;
    font-family: var(--font-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-border-light);
}

.founder-info__bio {
    margin-bottom: var(--spacing-lg);
}

.founder-info__bio p {
    font-size: 0.95rem;
    line-height: 1.85;
    color: var(--color-text-medium);
    margin-bottom: var(--spacing-md);
}

.founder-info__bio p:last-child {
    margin-bottom: 0;
}

.founder-info__social {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border-light);
}

.founder-social-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-medium);
    background: var(--color-background-alt);
    border-radius: 50px;
    transition: all var(--transition-fast);
}

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

.founder-social-link svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

/* =============================================
   HKUST Team Section
   ============================================= */
.team-section {
    text-align: center;
}

.team-image-container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-md);
    background: white;
    border-radius: 16px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--color-border-light);
}

.team-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    display: block;
}

/* =============================================
   Responsive Design
   ============================================= */
@media (max-width: 1200px) {
    .founders__grid {
        grid-template-columns: 1fr;
    }
    
    .founder-card--full {
        grid-column: span 1;
    }
    
    .founders-showcase {
        gap: var(--spacing-2xl);
    }
}

@media (max-width: 992px) {
    .founders-showcase {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .founders-showcase__images {
        flex-direction: row;
        justify-content: center;
    }
    
    .founders-showcase__info {
        min-height: auto;
    }
    
    .founder-info {
        position: relative;
        transform: none;
    }
    
    .founder-info.active {
        transform: none;
    }
    
    .founder-info:not(.active) {
        display: none;
    }
    
    .about__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .about__image {
        order: -1;
    }
    
    .features__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .awards__grid {
        grid-template-columns: 1fr;
    }
    
    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact__grid {
        grid-template-columns: 1fr;
    }
    
    .gallery__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .gallery__item--large {
        grid-column: span 1;
        grid-row: span 1;
    }
    
    .founder-card {
        grid-template-columns: 1fr;
    }
    
    .founder-card__image img {
        height: 280px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-3xl: 4rem;
        --spacing-4xl: 5rem;
    }
    
    .founder-avatar {
        width: 120px;
        height: 120px;
    }
    
    .founder-info__name {
        font-size: 1.5rem;
    }
    
    .team-image-container {
        padding: var(--spacing-sm);
    }
    
    .nav__list {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        justify-content: flex-start;
        gap: var(--spacing-lg);
        padding: var(--spacing-2xl) var(--spacing-xl);
        background: white;
        transform: translateX(100%);
        transition: transform var(--transition-medium);
        z-index: 999;
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    }

    .nav__list--open {
        transform: translateX(0);
    }

    .nav__link {
        font-size: 1.1rem;
        padding: var(--spacing-sm) 0;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__toggle--active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav__toggle--active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav__toggle--active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero__title {
        font-size: 2.5rem;
    }
    
    .hero__subtitle {
        font-size: 1.1rem;
    }
    
    .features__grid {
        grid-template-columns: 1fr;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .stat-item__number {
        font-size: 2.5rem;
    }
    
    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer__bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .gallery__grid {
        grid-template-columns: 1fr;
    }
    
    .service-item {
        grid-template-columns: 1fr;
    }
    
    .service-item__number {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero__cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .about__image::before {
        display: none;
    }
}

/* =============================================
   Animations
   ============================================= */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fade-in {
    animation: fadeIn 0.6s ease forwards;
}

/* Stagger animations */
.stagger > * {
    opacity: 0;
}

.stagger.animate > *:nth-child(1) { animation: fadeInUp 0.6s ease 0.1s forwards; }
.stagger.animate > *:nth-child(2) { animation: fadeInUp 0.6s ease 0.2s forwards; }
.stagger.animate > *:nth-child(3) { animation: fadeInUp 0.6s ease 0.3s forwards; }
.stagger.animate > *:nth-child(4) { animation: fadeInUp 0.6s ease 0.4s forwards; }
.stagger.animate > *:nth-child(5) { animation: fadeInUp 0.6s ease 0.5s forwards; }
.stagger.animate > *:nth-child(6) { animation: fadeInUp 0.6s ease 0.6s forwards; }

/* =============================================
   Utility Classes
   ============================================= */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}