/* Changi Airport Engineering Stories - Main Styles */

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--white);
    overflow-x: hidden;
}

/* Navigation - Hidden */
.changi-nav {
    display: none !important;
    visibility: hidden;
}

/* Story Container */
.story-container {
    margin-top: 0;
}

/* Ensure main content starts at top */
main.story-container {
    margin-top: 0;
    padding-top: 0;
}

/* Hero Section with Video Background */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-top: 0;
    padding-top: 0;
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
    max-width: 800px;
    padding: var(--space-6);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero-title {
    font-size: calc(var(--text-6xl) * 1.3);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-6);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-size: calc(var(--text-xl) * 1.3);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--space-8);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-8);
    background: var(--changi-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-semibold);
    transition: var(--transition-all);
    box-shadow: var(--shadow-lg);
}

.hero-cta:hover {
    background: var(--changi-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* Story Sections */
.story-section {
    min-height: 100vh;
    padding: var(--space-20) var(--space-6);
    display: flex;
    align-items: center;
    justify-content: center;
}

.section-content {
    max-width: 1200px;
    width: 100%;
    display: grid;
    gap: var(--space-12);
    align-items: center;
}

.section-text {
    max-width: 600px;
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--changi-primary);
    margin-bottom: var(--space-6);
}

.section-description {
    font-size: var(--text-lg);
    color: var(--gray-600);
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

.section-features {
    list-style: none;
}

.section-features li {
    padding: var(--space-3) 0;
    padding-left: var(--space-8);
    position: relative;
    color: var(--gray-700);
}

.section-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--changi-success);
    font-weight: var(--font-weight-bold);
}

.section-media {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.section-image {
    width: 100%;
    height: auto;
    display: block;
}

/* Grid layouts */
.grid-2 {
    grid-template-columns: 1fr 1fr;
}

.grid-reverse .section-text {
    order: 2;
}

.grid-reverse .section-media {
    order: 1;
}

/* Hide all white bar related elements */
.full-top-white-bar,
.changi-header-overlay,
.header-overlay-content,
.top-bar-content {
    display: none !important;
    visibility: hidden !important;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.nav-logo {
    height: 40px;
    width: auto;
}

.nav-title {
    font-size: var(--text-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--changi-primary);
}

.nav-progress {
    flex: 1;
    max-width: 200px;
    margin: 0 var(--space-6);
}

.progress-bar {
    width: 100%;
    height: 3px;
    background: var(--gray-200);
    border-radius: 2px;
    overflow: hidden;
}

.nav-menu {
    display: flex;
    gap: var(--space-4);
}

.nav-link {
    color: var(--gray-700);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: var(--transition-all);
}

.nav-link:hover {
    background: var(--gray-100);
    color: var(--changi-primary);
}

/* CSS Custom Properties for Changi Branding */
:root {
    /* Changi Brand Colors */
    --changi-primary: #0066CC;      /* Changi Blue */
    --changi-secondary: #003366;    /* Dark Navy */
    --changi-accent: #FF6600;       /* Warm Orange */
    --changi-success: #00CC66;      /* Success Green */
    --changi-warning: #FFCC00;      /* Warning Yellow */
    --changi-error: #FF3333;        /* Error Red */
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --gray-50: #F8FAFC;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E1;
    --gray-400: #94A3B8;
    --gray-500: #64748B;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1E293B;
    --gray-900: #0F172A;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Font Sizes */
    --text-xs: 0.75rem;     /* 12px */
    --text-sm: 0.875rem;    /* 14px */
    --text-base: 1rem;      /* 16px */
    --text-lg: 1.125rem;    /* 18px */
    --text-xl: 1.25rem;     /* 20px */
    --text-2xl: 1.5rem;     /* 24px */
    --text-3xl: 1.875rem;   /* 30px */
    --text-4xl: 2.25rem;    /* 36px */
    --text-5xl: 3rem;       /* 48px */
    --text-6xl: 3.75rem;    /* 60px */
    
    /* Spacing */
    --space-1: 0.25rem;     /* 4px */
    --space-2: 0.5rem;      /* 8px */
    --space-3: 0.75rem;     /* 12px */
    --space-4: 1rem;        /* 16px */
    --space-5: 1.25rem;     /* 20px */
    --space-6: 1.5rem;      /* 24px */
    --space-8: 2rem;        /* 32px */
    --space-10: 2.5rem;     /* 40px */
    --space-12: 3rem;       /* 48px */
    --space-16: 4rem;       /* 64px */
    --space-20: 5rem;       /* 80px */
    --space-24: 6rem;       /* 96px */
    --space-32: 8rem;       /* 128px */
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Border Radius */
    --radius-sm: 0.25rem;   /* 4px */
    --radius: 0.375rem;     /* 6px */
    --radius-md: 0.5rem;    /* 8px */
    --radius-lg: 0.75rem;   /* 12px */
    --radius-xl: 1rem;      /* 16px */
    --radius-2xl: 1.5rem;   /* 24px */
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-all: all 250ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    tab-size: 4;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--space-4);
    color: var(--gray-900);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
    margin-bottom: var(--space-4);
    line-height: 1.7;
    color: var(--gray-700);
}

/* Container and Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* Navigation Styles - Hidden for full screen experience */
.changi-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    z-index: var(--z-fixed);
    transition: var(--transition-all);
}

.nav-container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.nav-logo {
    height: 40px;
    width: auto;
}

.nav-title {
    font-size: var(--text-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--changi-primary);
}

.nav-progress {
    flex: 1;
    height: 4px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    margin: 0 var(--space-8);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--changi-primary), var(--changi-accent));
    border-radius: var(--radius-full);
    width: 0%;
    transition: width 0.3s ease;
}

.nav-menu {
    display: flex;
    gap: var(--space-6);
}

.nav-link {
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
    color: var(--gray-600);
    text-decoration: none;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius);
    transition: var(--transition-all);
}

.nav-link:hover {
    color: var(--changi-primary);
    background: var(--gray-50);
}

/* Changi Logo Overlay - Hidden */
.changi-logo-overlay {
    display: none;
    visibility: hidden;
}

/* Logo styles - Hidden */
.hero-logo {
    display: none;
}

.hero-logo:hover {
    display: none;
}

/* Hero Section - Full Screen */
.hero-section {
    position: relative;
    height: 100vh;
    width: 100vw;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-800) 100%);
    z-index: 1;
}

/* White top border for hero video only */
.hero-with-border::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.9);
    z-index: 10;
    box-shadow: 0 2px 10px rgba(255, 255, 255, 0.3);
}

/* Loading indicator with progress */
.hero-background::before {
    content: '';
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 2px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 1px;
    z-index: 10;
}

.hero-background::after {
    content: '';
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    width: 0%;
    height: 2px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 1px;
    transition: width 0.3s ease;
    animation: loadingProgress 2s ease-in-out infinite;
    z-index: 11;
}

@keyframes loadingProgress {
    0% { width: 0%; }
    50% { width: 60%; }
    100% { width: 80%; }
}

.hero-background.video-loaded::before,
.hero-background.video-loaded::after {
    display: none;
}

/* Keep existing video styles for compatibility */
.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 1s ease-out;
    z-index: 1;
    will-change: opacity;
}

.hero-video.loaded {
    opacity: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.1);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 var(--space-6);
}

.hero-title {
    font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
    font-family: "Times New Roman", Times, serif;
    font-weight: 900;
    margin-bottom: var(--space-6);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    color: var(--white);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(var(--text-lg), 2.5vw, var(--text-2xl));
    font-weight: var(--font-weight-normal);
    margin-bottom: var(--space-12);
    opacity: 0.9;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    color: var(--white);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-12);
    margin-bottom: var(--space-16);
    width: 100%;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats-secondary {
    margin-top: var(--space-4);
    margin-bottom: var(--space-8);
    opacity: 0.9;
}

.stat-item {
    text-align: center;
    flex: 1;
    min-width: 0;
}

.stat-number {
    display: block;
    font-size: calc(var(--text-3xl) * 1.3);
    font-weight: var(--font-weight-bold);
    color: var(--changi-accent);
    margin-bottom: var(--space-2);
}

.stat-label {
    display: block;
    font-size: calc(var(--text-sm) * 1.3);
    opacity: 0.8;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    animation: bounce 2s infinite;
    z-index: 10;
}

.scroll-indicator span {
    display: block;
    font-size: var(--text-sm);
    margin-bottom: var(--space-2);
    opacity: 0.8;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border: 2px solid var(--white);
    border-left: none;
    border-top: none;
    transform: rotate(45deg);
    margin: 0 auto;
}

/* Hero Discover - Bottom Center Positioning */
.hero-discover {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.hero-discover .scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    cursor: pointer;
    animation: none !important;
}

.hero-discover .scroll-indicator:hover {
    opacity: 0.8;
}

.hero-discover .scroll-indicator span {
    font-size: var(--text-lg);
    font-weight: var(--font-weight-semibold);
    color: white;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.7);
    letter-spacing: 0.025em;
    margin-bottom: 0;
    display: block;
    opacity: 1;
}

.hero-discover .scroll-arrow {
    width: 24px;
    height: 24px;
    border: none;
    border-right: 3px solid white;
    border-bottom: 3px solid white;
    transform: rotate(45deg);
    animation: arrowBounce 2s infinite;
    background: transparent;
    margin: 0;
}

@keyframes arrowBounce {
    0%, 20%, 50%, 80%, 100% {
        transform: rotate(45deg) translateY(0);
    }
    40% {
        transform: rotate(45deg) translateY(-8px);
    }
    60% {
        transform: rotate(45deg) translateY(-4px);
    }
}

@keyframes heroArrowBounce {
    0%, 20%, 50%, 80%, 100% {
        transform: rotate(45deg) translateY(0);
    }
    40% {
        transform: rotate(45deg) translateY(-8px);
    }
    60% {
        transform: rotate(45deg) translateY(-4px);
    }
}

/* Section Styles */
.section-title {
    font-size: var(--text-4xl);
    font-family: "Times New Roman", Times, serif;
    font-weight: 800;
    color: var(--gray-900);
    text-align: center;
    margin-bottom: var(--space-6);
    letter-spacing: -0.01em;
}

/* Introduction Section */
.intro-section {
    padding: var(--space-24) 0;
    background: var(--gray-50);
}

.intro-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-16);
}

.intro-text {
    font-size: var(--text-lg);
    color: var(--gray-700);
    line-height: 1.7;
}

.innovation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
    margin-top: var(--space-12);
}

.innovation-card {
    background: var(--white);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: var(--transition-all);
    cursor: pointer;
}

.innovation-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    font-size: var(--text-5xl);
    margin-bottom: var(--space-4);
}

.innovation-card h3 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-3);
    color: var(--changi-primary);
}

.innovation-card p {
    color: var(--gray-600);
    margin-bottom: 0;
}

/* Product Sections */
.product-section {
    margin-bottom: var(--space-32);
}

.product-hero {
    position: relative;
    height: 60vh;
    min-height: 400px;
    overflow: hidden;
    margin-bottom: var(--space-16);
}

.product-media {
    position: relative;
    width: 100%;
    height: 100%;
}

.product-image,
.product-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.media-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.85));
    color: var(--white);
    padding: var(--space-12) var(--space-6) var(--space-8);
}

.product-title {
    font-size: var(--text-5xl);
    font-family: "Times New Roman", Times, serif;
    font-weight: 900;
    margin-bottom: var(--space-3);
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8), 0 0 16px rgba(0, 0, 0, 0.6);
    color: #ffffff;
    letter-spacing: -0.02em;
}

.product-tagline {
    font-size: var(--text-xl);
    opacity: 0.95;
    margin-bottom: 0;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.8), 0 0 8px rgba(0, 0, 0, 0.6);
    font-weight: 500;
    color: #ffffff;
}

.product-content {
    padding: 0 var(--space-6);
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-12);
    margin-bottom: var(--space-16);
    align-items: start;
    min-height: auto;
}

.content-visual {
    display: flex;
    flex-direction: column;
    min-height: auto;
    height: auto;
    align-items: center;
    justify-content: flex-start;
    padding-top: 0;
}

.content-text {
    display: flex;
    flex-direction: column;
    height: auto;
    justify-content: flex-start;
}

.content-text h3 {
    font-size: var(--text-3xl);
    font-family: "Times New Roman", Times, serif;
    font-weight: 700;
    color: var(--changi-primary);
    margin-bottom: var(--space-4);
    letter-spacing: -0.01em;
}

.feature-list {
    margin-top: var(--space-4);
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
}

.feature-icon {
    font-size: var(--text-2xl);
    flex-shrink: 0;
}

.feature-content h4 {
    font-size: var(--text-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-2);
    color: var(--gray-900);
}

.feature-content p {
    font-size: var(--text-sm);
    color: var(--gray-600);
    margin-bottom: 0;
}

/* Performance Metrics */
.performance-metrics {
    background: #4C1D95;
    color: var(--white);
    padding: var(--space-12);
    border-radius: var(--radius-2xl);
    margin-top: var(--space-16);
}

.performance-metrics h3 {
    color: var(--white);
    text-align: center;
    margin-bottom: var(--space-8);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-8);
}

.metric-item {
    text-align: center;
}

.metric-value {
    display: block;
    font-size: var(--text-4xl);
    font-weight: var(--font-weight-bold);
    color: #FDE047;
    margin-bottom: var(--space-2);
}

.metric-label {
    display: block;
    font-size: var(--text-sm);
    color: #E5E7EB;
    opacity: 0.95;
}

/* Specifications Grid Styles */
.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

.spec-category {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    border-left: 4px solid var(--changi-accent);
}

.spec-category h4 {
    font-size: var(--text-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--changi-accent);
    margin-bottom: var(--space-3);
}

.spec-category p {
    font-size: var(--text-sm);
    line-height: 1.6;
    color: var(--gray-700);
    margin: 0;
}

/* Tech Diagram Styles */
.tech-diagram {
    position: relative;
    background: transparent;
    border-radius: 0;
    padding: 0;
    overflow: hidden;
    width: 100%;
    height: auto;
    min-height: auto;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
}

.diagram-image {
    width: 100%;
    height: auto;
    min-height: 300px;
    max-height: 400px;
    object-fit: contain;
    border-radius: var(--radius-xl);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
    margin-bottom: var(--space-2);
}

.diagram-image-secondary {
    width: 100%;
    height: auto;
    min-height: 300px;
    max-height: 400px;
    object-fit: contain;
    border-radius: var(--radius-xl);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
    margin-top: var(--space-2);
}

.diagram-points {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.diagram-point {
    position: absolute;
    width: 30px;
    height: 30px;
    background: var(--changi-accent);
    color: var(--white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    transition: var(--transition-all);
}

.diagram-point:hover {
    transform: scale(1.2);
    box-shadow: var(--shadow-lg);
}

/* Process Flow */
.process-flow {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-8);
    gap: var(--space-4);
}

.process-step {
    text-align: center;
    flex: 1;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--changi-primary);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: var(--text-lg);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-4);
}

.process-step h4 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
    color: var(--gray-900);
}

.process-step p {
    font-size: var(--text-sm);
    color: var(--gray-600);
    margin-bottom: 0;
}

/* Dashboard Styles */
.hygiene-dashboard,
.aims-interface {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
}

.dashboard-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

.dashboard-item {
    text-align: center;
    padding: var(--space-4);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
}

.dashboard-value {
    display: block;
    font-size: var(--text-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--changi-accent);
    margin-bottom: var(--space-2);
}

.dashboard-label {
    display: block;
    font-size: var(--text-xs);
    opacity: 0.8;
}

/* AUSV Reference Section */
.ausv-reference {
    margin-top: var(--space-4);
    padding-top: 0;
    border-top: none;
    width: 100%;
}

.ausv-reference h3 {
    color: var(--white);
    margin-bottom: var(--space-4);
    font-family: var(--font-serif);
    text-align: center;
    font-size: var(--text-2xl);
}

.news-article {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    padding: 0;
    border-left: 4px solid var(--changi-accent);
    overflow: hidden;
    transition: all var(--transition-smooth);
    position: relative;
}

.news-article:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.article-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.article-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.15;
    transition: opacity var(--transition-smooth);
}

.news-article:hover .article-bg-image {
    opacity: 0.25;
}

.article-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(0, 0, 0, 0.8) 0%,
        rgba(0, 0, 0, 0.6) 50%,
        rgba(0, 0, 0, 0.9) 100%
    );
}

.article-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-6) var(--space-8) var(--space-4);
    background: rgba(0, 0, 0, 0.4);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 2;
    backdrop-filter: blur(10px);
}

.news-badge {
    background: var(--changi-accent);
    color: var(--white);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--border-radius-sm);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.article-source {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.source-logo {
    font-size: var(--text-lg);
}

.source-logo-img {
    height: 24px;
    width: auto;
    object-fit: contain;
    filter: brightness(0.8);
    transition: filter var(--transition-smooth);
}

.article-header:hover .source-logo-img {
    filter: brightness(1);
}

.source-name {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
}

.article-content {
    padding: var(--space-8);
    position: relative;
    z-index: 2;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
}

.news-article h4 {
    color: var(--white);
    margin-bottom: var(--space-6);
    font-size: var(--text-lg);
    line-height: 1.4;
    font-weight: var(--font-weight-semibold);
}

.news-article p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--space-8);
    line-height: 1.6;
}

.article-cta {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.article-link {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    background: var(--changi-accent);
    color: var(--white);
    text-decoration: none;
    padding: var(--space-4) var(--space-6);
    border-radius: var(--border-radius-md);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.article-link:hover {
    background: var(--white);
    color: var(--changi-primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(var(--changi-accent-rgb), 0.4);
}

.article-link:hover .link-icon {
    transform: translateX(4px);
}

.link-text {
    font-size: var(--text-base);
}

.link-icon {
    font-size: var(--text-lg);
    transition: transform var(--transition-smooth);
    margin-left: var(--space-3);
}

.article-meta {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--text-xs);
    font-style: italic;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .article-header {
        flex-direction: column;
        gap: var(--space-3);
        align-items: flex-start;
    }
    
    .article-link {
        width: 100%;
        text-align: center;
    }
}

/* Baggage Hygiene Specific Styles */

/* Part 1: Baggage Intro Section */
.baggage-intro {
    padding: var(--space-16) 0;
    background: rgba(0, 0, 0, 0.8);
    color: var(--white);
}

.baggage-intro h3 {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    margin-bottom: var(--space-6);
    color: var(--white);
}

.baggage-intro p {
    font-size: var(--text-lg);
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.9);
}

/* Part 2: Full-Width Image Showcase */
.image-title-section {
    padding: var(--space-12) 0 var(--space-8);
    text-align: center;
    background: rgba(0, 0, 0, 0.9);
    color: var(--white);
}

.image-title-section h3 {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    margin-bottom: var(--space-4);
    color: var(--white);
}

.image-title-section p {
    font-size: var(--text-lg);
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
    line-height: 1.6;
}

.improper-methods-showcase {
    position: relative;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    overflow: hidden;
    padding: 0;
}

.full-width-image {
    width: 100%;
    height: 70vh;
    min-height: 500px;
    object-fit: cover;
    object-position: center center;
    display: block;
}

/* Part 3: Impact Videos (2 Left + 1 Right Layout) */
.impact-section {
    padding: var(--space-16) 0;
    background: rgba(0, 0, 0, 0.9);
    color: var(--white);
}

.impact-section h3 {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    margin-bottom: var(--space-12);
    text-align: center;
    color: var(--white);
}

.impact-videos-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

.impact-left-column {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.impact-right-column {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.impact-video-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    padding: var(--space-8);
    text-align: center;
}

.impact-video {
    width: 100%;
    height: 350px;
    border-radius: var(--border-radius-md);
    margin-bottom: var(--space-4);
    object-fit: cover;
}

.video-label {
    color: var(--changi-accent);
    font-size: var(--text-lg);
    font-weight: var(--font-weight-medium);
    display: block;
}

/* Part 4: Monitoring Videos (Side by Side) */
.monitoring-section {
    padding: var(--space-16) 0;
    background: rgba(0, 0, 0, 0.8);
    color: var(--white);
}

.monitoring-section h3 {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    margin-bottom: var(--space-12);
    text-align: center;
    color: var(--white);
}

.monitoring-videos-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
}

.monitoring-video-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    padding: var(--space-8);
    border-left: 4px solid var(--changi-accent);
}

.monitoring-video {
    width: 100%;
    height: 300px;
    border-radius: var(--border-radius-md);
    margin-bottom: var(--space-6);
    object-fit: cover;
}

.monitoring-info h4 {
    color: var(--white);
    margin-bottom: var(--space-3);
    font-size: var(--text-xl);
    font-family: var(--font-serif);
}

.monitoring-info p {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--text-base);
    line-height: 1.6;
    margin: 0;
}

/* Responsive adjustments for new baggage section */
@media (max-width: 1024px) {
    .impact-videos-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .impact-left-column {
        gap: var(--space-4);
    }
    
    .impact-right-column {
        margin-top: var(--space-4);
    }
    
    .monitoring-videos-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .full-width-image {
        height: 60vh;
        min-height: 400px;
    }
    
    .impact-video {
        height: 300px;
    }
    
    .monitoring-video {
        height: 250px;
    }
}

@media (max-width: 768px) {
    .baggage-intro {
        padding: var(--space-12) 0;
    }
    
    .impact-section,
    .monitoring-section {
        padding: var(--space-12) 0;
    }
    
    .image-overlay {
        padding: var(--space-8) var(--space-4) var(--space-6);
    }
    
    .image-overlay h4 {
        font-size: var(--text-xl);
    }
    
    .image-overlay p {
        font-size: var(--text-base);
    }
    
    .impact-section h3,
    .monitoring-section h3 {
        font-size: var(--text-2xl);
        margin-bottom: var(--space-8);
    }
    
    .monitoring-video-item,
    .impact-video-item {
        padding: var(--space-6);
    }
    
    .full-width-image {
        height: 50vh;
        min-height: 350px;
    }
    
    .impact-left-column {
        gap: var(--space-6);
    }
    
    .impact-video {
        height: 250px;
    }
    
    .monitoring-video {
        height: 220px;
    }
}

/* Footer */
.changi-footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-section h4 {
    color: var(--changi-accent);
    margin-bottom: var(--space-4);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-2);
}

.footer-links a,
.social-link {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition-all);
}

.footer-links a:hover,
.social-link:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: var(--space-8);
    text-align: center;
    color: var(--gray-400);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    
    .hero-stats {
        gap: var(--space-8);
        max-width: 600px;
    }
    
    .nav-menu {
        display: none;
    }
}

@media (max-width: 768px) {
    .hero-stats {
        flex-direction: column;
        gap: var(--space-6);
        max-width: 400px;
    }
    
    .hero-stats .stat-item {
        margin-bottom: var(--space-4);
    }
    
    .hero-stats-secondary .stat-item {
        margin-bottom: var(--space-4);
    }
    
    .innovation-grid {
        grid-template-columns: 1fr;
    }
    
    .process-flow {
        flex-direction: column;
        gap: var(--space-6);
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
    
    .container,
    .nav-container {
        padding: 0 var(--space-4);
    }
}

@media (max-width: 480px) {
    .hero-section {
        height: 80vh;
    }
    
    .product-hero {
        height: 40vh;
    }
    
    .hero-title {
        font-size: var(--text-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--text-lg);
    }
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Video Showcase Styles */
.showcase-video {
    width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    display: block;
}