/*
 * Sydney Photonics - Main Stylesheet
 */

:root {
    --brand-blue: #0B4D8C;
    --brand-blue-dark: #082F54;
    --brand-orange: #E86A1E;
    --brand-yellow: #F5A623;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a5a;
    --bg-cream: #FAFAF8;
    --bg-light: #F5F5F2;
    --border-subtle: rgba(11, 77, 140, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--bg-cream);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Accessibility - Skip to main content link */
.skip-to-main {
    position: absolute;
    left: -9999px;
    z-index: 999;
    padding: 1rem 2rem;
    background: var(--brand-blue);
    color: white;
    text-decoration: none;
    font-weight: 500;
    border-radius: 0 0 4px 0;
}

.skip-to-main:focus {
    left: 0;
    top: 0;
}

/* Focus styles for keyboard navigation */
*:focus {
    outline: 2px solid var(--brand-orange);
    outline-offset: 2px;
}

*:focus:not(:focus-visible) {
    outline: none;
}

*:focus-visible {
    outline: 2px solid var(--brand-orange);
    outline-offset: 2px;
}

/* Reduced motion support for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(250, 250, 248, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-subtle);
    transition: all 0.3s ease;
}

nav.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 60px;
    width: auto;
}

.logo-img-light {
    filter: brightness(0) invert(1);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 400;
    transition: color 0.2s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--brand-orange);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--brand-blue);
}

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

.nav-links a.active {
    color: var(--brand-blue);
}

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

.nav-cta {
    background: var(--brand-blue);
    color: white !important;
    padding: 0.6rem 1.5rem;
    border-radius: 4px;
    transition: background 0.2s, transform 0.2s !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background: var(--brand-blue-dark);
    transform: translateY(-1px);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 3rem 4rem;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    right: -10%;
    width: 60%;
    height: 100%;
    background: linear-gradient(135deg, rgba(11, 77, 140, 0.03) 0%, rgba(232, 106, 30, 0.05) 100%);
    border-radius: 0 0 0 50%;
    z-index: 0;
}

.hero-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 6rem;
    align-items: center;
    position: relative;
    z-index: 1;
    width: 100%;
}

.hero-text h1 {
    font-family: 'Source Serif 4', serif;
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 600;
    line-height: 1.15;
    color: var(--brand-blue-dark);
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: slideUp 0.8s ease 0.3s forwards;
}

.hero-text h1 span {
    color: var(--brand-orange);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 540px;
    margin-bottom: 2.5rem;
    opacity: 0;
    animation: slideUp 0.8s ease 0.5s forwards;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    opacity: 0;
    animation: slideUp 0.8s ease 0.7s forwards;
}

.btn-primary {
    background: var(--brand-blue);
    color: white;
    padding: 1rem 2rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary:hover {
    background: var(--brand-blue-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(11, 77, 140, 0.25);
}

.btn-secondary {
    background: transparent;
    color: var(--brand-blue);
    padding: 1rem 2rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    border: 2px solid var(--brand-blue);
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--brand-blue);
    color: white;
}

/* Lantern Visualisation */
.lantern-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    animation: fadeIn 1s ease 0.5s forwards;
}

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

.lantern-diagram {
    position: relative;
    width: 500px;
    height: 250px;
}

.fibre-bundle {
    position: absolute;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.fibre-bundle.mm-end {
    left: 0;
    top: 50%;
    transform: translateY(-50%);
}

.fibre-bundle.sm-end {
    right: -15px;
    top: 50%;
    transform: translateY(-50%);
}

.fibre {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-orange) 0%, var(--brand-yellow) 100%);
    box-shadow: 0 2px 8px rgba(232, 106, 30, 0.3);
    animation: pulse 3s ease-in-out infinite;
}

.fibre.small {
    width: 10px;
    height: 10px;
}

.hex-grid {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.hex-row {
    display: flex;
    gap: 3px;
}

.hex-row.offset {
    margin-left: 0;
}

@keyframes pulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

.taper-zone {
    position: absolute;
    left: 50px;
    right: 60px;
    top: 50%;
    height: 80px;
    transform: translateY(-50%);
    background: linear-gradient(90deg, 
        rgba(11, 77, 140, 0.1) 0%,
        rgba(11, 77, 140, 0.05) 50%,
        rgba(11, 77, 140, 0.1) 100%
    );
    clip-path: polygon(0 20%, 100% 0, 100% 100%, 0 80%);
}

.light-paths {
    position: absolute;
    left: 40px;
    right: 50px;
    top: 50%;
    transform: translateY(-50%);
    height: 80px;
}

.light-path {
    position: absolute;
    left: 0;
    height: 2px;
    width: 100%;
    background: linear-gradient(90deg, var(--brand-orange), var(--brand-yellow), transparent);
    border-radius: 1px;
    transform-origin: left center;
    opacity: 0;
}

/* All paths start from centre (50%) on left, fan out to different positions on right */
.light-path[data-row="1"] { 
    top: 50%; 
    animation: lightFan1 2.5s ease-in-out infinite;
    animation-delay: 0s;
}
.light-path[data-row="2"] { 
    top: 50%; 
    animation: lightFan2 2.5s ease-in-out infinite;
    animation-delay: 0.15s;
}
.light-path[data-row="3"] { 
    top: 50%; 
    animation: lightFan3 2.5s ease-in-out infinite;
    animation-delay: 0.3s;
}
.light-path[data-row="4"] { 
    top: 50%; 
    animation: lightFan4 2.5s ease-in-out infinite;
    animation-delay: 0.45s;
}
.light-path[data-row="5"] { 
    top: 50%; 
    animation: lightFan5 2.5s ease-in-out infinite;
    animation-delay: 0.6s;
}
.light-path[data-row="6"] { 
    top: 50%; 
    animation: lightFan6 2.5s ease-in-out infinite;
    animation-delay: 0.75s;
}
.light-path[data-row="7"] { 
    top: 50%; 
    animation: lightFan7 2.5s ease-in-out infinite;
    animation-delay: 0.9s;
}

@keyframes lightFan1 {
    0% { opacity: 0; clip-path: inset(0 100% 0 0); }
    20% { opacity: 0.9; clip-path: inset(0 70% 0 0); transform: rotate(-5deg); }
    50% { opacity: 0.8; clip-path: inset(0 0% 0 0); transform: rotate(-5deg); }
    100% { opacity: 0; clip-path: inset(0 0% 0 0); transform: rotate(-5deg); }
}

@keyframes lightFan2 {
    0% { opacity: 0; clip-path: inset(0 100% 0 0); }
    20% { opacity: 0.9; clip-path: inset(0 70% 0 0); transform: rotate(-2deg); }
    50% { opacity: 0.8; clip-path: inset(0 0% 0 0); transform: rotate(-2deg); }
    100% { opacity: 0; clip-path: inset(0 0% 0 0); transform: rotate(-2deg); }
}

@keyframes lightFan3 {
    0% { opacity: 0; clip-path: inset(0 100% 0 0); }
    20% { opacity: 0.9; clip-path: inset(0 70% 0 0); transform: rotate(-3.34deg); }
    50% { opacity: 0.8; clip-path: inset(0 0% 0 0); transform: rotate(-3.34deg); }
    100% { opacity: 0; clip-path: inset(0 0% 0 0); transform: rotate(-3.34deg); }
}

@keyframes lightFan4 {
    0% { opacity: 0; clip-path: inset(0 100% 0 0); }
    20% { opacity: 0.9; clip-path: inset(0 70% 0 0); transform: rotate(0deg); }
    50% { opacity: 0.8; clip-path: inset(0 0% 0 0); transform: rotate(0deg); }
    100% { opacity: 0; clip-path: inset(0 0% 0 0); transform: rotate(0deg); }
}

@keyframes lightFan5 {
    0% { opacity: 0; clip-path: inset(0 100% 0 0); }
    20% { opacity: 0.9; clip-path: inset(0 70% 0 0); transform: rotate(3.34deg); }
    50% { opacity: 0.8; clip-path: inset(0 0% 0 0); transform: rotate(3.34deg); }
    100% { opacity: 0; clip-path: inset(0 0% 0 0); transform: rotate(3.34deg); }
}

@keyframes lightFan6 {
    0% { opacity: 0; clip-path: inset(0 100% 0 0); }
    20% { opacity: 0.9; clip-path: inset(0 70% 0 0); transform: rotate(2deg); }
    50% { opacity: 0.8; clip-path: inset(0 0% 0 0); transform: rotate(2deg); }
    100% { opacity: 0; clip-path: inset(0 0% 0 0); transform: rotate(2deg); }
}

@keyframes lightFan7 {
    0% { opacity: 0; clip-path: inset(0 100% 0 0); }
    20% { opacity: 0.9; clip-path: inset(0 70% 0 0); transform: rotate(5deg); }
    50% { opacity: 0.8; clip-path: inset(0 0% 0 0); transform: rotate(5deg); }
    100% { opacity: 0; clip-path: inset(0 0% 0 0); transform: rotate(5deg); }
}

.diagram-labels {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 50px;
    pointer-events: none;
}

.diagram-labels span:first-child {
    position: absolute;
    left: 0;
    bottom: 0;
    font-size: 1rem;
    font-weight: 500;
    color: var(--brand-orange);
    white-space: nowrap;
}

.diagram-labels span:last-child {
    position: absolute;
    right: 0;
    bottom: 0;
    font-size: 1rem;
    font-weight: 500;
    color: var(--brand-blue);
    white-space: nowrap;
}

/* Products Section */
.products {
    padding: 8rem 3rem;
    background: white;
}

.section-header {
    max-width: 1400px;
    margin: 0 auto 4rem;
    text-align: center;
}

.section-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--brand-orange);
    margin-bottom: 1rem;
    font-weight: 500;
}

.section-title {
    font-family: 'Source Serif 4', serif;
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--brand-blue-dark);
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.products-grid {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.product-card {
    background: var(--bg-cream);
    border-radius: 8px;
    padding: 2.5rem;
    border: 1px solid var(--border-subtle);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--brand-blue), var(--brand-orange));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(11, 77, 140, 0.1);
}

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

.product-fibre-count {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.fibre-dots {
    position: relative;
    width: 60px;
    height: 60px;
}

.fibre-dots span {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--brand-orange);
}

.fibre-dots span:nth-child(even) {
    background: var(--brand-yellow);
}

/* Fibre packing positions are calculated by JavaScript for geometric accuracy */

.product-name {
    font-family: 'Source Serif 4', serif;
    font-size: 1.75rem;
    color: var(--brand-blue-dark);
    margin-bottom: 0.5rem;
}

.product-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.product-specs {
    list-style: none;
    margin-bottom: 2rem;
}

.product-specs li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-subtle);
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
}

.product-specs li:last-child {
    border-bottom: none;
}

.spec-label {
    color: var(--text-secondary);
}

.spec-value {
    font-weight: 500;
    color: var(--brand-blue);
}

.product-link {
    color: var(--brand-blue);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap 0.2s;
}

.product-link:hover {
    gap: 0.75rem;
}

/* About / Heritage Section */
.heritage {
    padding: 8rem 3rem;
    background: var(--bg-light);
}

.heritage-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 6rem;
    align-items: center;
}

.heritage-visual {
    position: relative;
}

.heritage-image {
    width: 100%;
    aspect-ratio: 3/4;
    background: linear-gradient(135deg, var(--brand-blue) 0%, var(--brand-blue-dark) 100%);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 3rem 2rem;
}

.heritage-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.origin-badge {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 8px;
    color: white;
    text-align: center;
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 280px;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.origin-badge:not(:last-child)::after {
    content: '↓';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
    color: var(--brand-orange);
    z-index: 2;
    line-height: 2.5rem;
}

.origin-badge .year {
    font-family: 'Source Serif 4', serif;
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.origin-badge p {
    font-size: 0.9rem;
    opacity: 0.9;
}

.heritage-text h2 {
    font-family: 'Source Serif 4', serif;
    font-size: clamp(2rem, 3.5vw, 2.5rem);
    color: var(--brand-blue-dark);
    margin-bottom: 1.5rem;
}

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

.heritage-text a {
    color: var(--brand-blue);
    text-decoration: none;
}

.heritage-text a:hover {
    color: var(--brand-orange);
    text-decoration: underline;
}

.founder-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-subtle);
    margin-top: 2rem;
}

.founder-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-blue) 0%, var(--brand-orange) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1.25rem;
}

.founder-details h4 {
    color: var(--brand-blue-dark);
    margin-bottom: 0.25rem;
}

.founder-details p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Applications Section */
.applications {
    padding: 8rem 3rem;
    background: white;
}

.applications-grid {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 4rem;
}

.app-card {
    padding: 2rem;
    background: var(--bg-cream);
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
    transition: all 0.3s ease;
}

.app-card:hover {
    border-color: var(--brand-blue);
}

.app-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--brand-blue) 0%, rgba(11, 77, 140, 0.8) 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.app-card h3 {
    font-size: 1.1rem;
    color: var(--brand-blue-dark);
    margin-bottom: 0.5rem;
}

.app-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Technology Section */
.technology {
    padding: 8rem 3rem;
    background: var(--bg-light);
}

.technology-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.technology-text h3 {
    font-family: 'Source Serif 4', serif;
    font-size: 1.5rem;
    color: var(--brand-blue-dark);
    margin-bottom: 1rem;
}

.technology-text p {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.technology-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.feature {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
}

.feature h4 {
    font-size: 1rem;
    color: var(--brand-blue-dark);
    margin-bottom: 0.5rem;
}

.feature p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Contact Section */
.contact {
    padding: 8rem 3rem;
    background: white;
}

.contact-container {
    max-width: 1100px;
    margin: 0 auto;
}

.contact .section-header {
    margin-bottom: 3rem;
}

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

.contact-info h3 {
    font-family: 'Source Serif 4', serif;
    font-size: 1.5rem;
    color: var(--brand-blue-dark);
    margin-bottom: 1.5rem;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.contact-info a {
    color: var(--brand-blue);
    text-decoration: none;
}

.contact-info a:hover {
    text-decoration: underline;
}

.contact-info ul {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    padding-left: 1.25rem;
}

.contact-info li {
    margin-bottom: 0.5rem;
}

.contact-info .btn-primary {
    margin-top: 1rem;
    color: white;
}

/* CTA Section */
.cta {
    padding: 8rem 3rem;
    background: linear-gradient(135deg, var(--brand-blue-dark) 0%, var(--brand-blue) 100%);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(ellipse, rgba(232, 106, 30, 0.15) 0%, transparent 70%);
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta h2 {
    font-family: 'Source Serif 4', serif;
    font-size: clamp(2rem, 4vw, 3rem);
    color: white;
    margin-bottom: 1.5rem;
}

.cta p {
    color: rgba(255,255,255,0.85);
    font-size: 1.15rem;
    margin-bottom: 2.5rem;
}

.cta .btn-primary {
    background: white;
    color: var(--brand-blue);
}

.cta .btn-primary:hover {
    background: var(--bg-cream);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

/* Footer */
footer {
    background: var(--brand-blue-dark);
    color: white;
    padding: 4rem 3rem 2rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 4rem;
}

.footer-brand p {
    color: rgba(255,255,255,0.7);
    margin-top: 1rem;
    font-size: 0.9rem;
    max-width: 300px;
}

.footer-col h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
    color: rgba(255,255,255,0.5);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.footer-col a:hover {
    color: var(--brand-orange);
}

.footer-bottom {
    max-width: 1400px;
    margin: 4rem auto 0;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

.usyd-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
}

.usyd-link:hover {
    color: white;
}

/* Page Header (for inner pages) */
.page-header {
    padding: 10rem 3rem 4rem;
    background: var(--bg-light);
    text-align: center;
}

.page-header h1 {
    font-family: 'Source Serif 4', serif;
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    color: var(--brand-blue-dark);
    margin-bottom: 1rem;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Page Content */
.page-content {
    padding: 4rem 3rem;
    background: white;
}

.page-content .container {
    max-width: 900px;
    margin: 0 auto;
}

.page-content h2 {
    font-family: 'Source Serif 4', serif;
    font-size: 1.75rem;
    color: var(--brand-blue-dark);
    margin: 2.5rem 0 1rem;
}

.page-content h2:first-child {
    margin-top: 0;
}

.page-content h3 {
    font-family: 'Source Serif 4', serif;
    font-size: 1.35rem;
    color: var(--brand-blue-dark);
    margin: 2rem 0 0.75rem;
}

.page-content p {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.page-content ul, .page-content ol {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.page-content li {
    margin-bottom: 0.5rem;
}

/* Contact Page */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1100px;
    margin: 0 auto;
}

.contact-info h3 {
    font-family: 'Source Serif 4', serif;
    font-size: 1.5rem;
    color: var(--brand-blue-dark);
    margin-bottom: 1.5rem;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.contact-info a {
    color: var(--brand-blue);
    text-decoration: none;
}

.contact-info a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 4rem;
    }

    .lantern-visual {
        order: -1;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .heritage-content {
        grid-template-columns: 1fr;
    }

    .applications-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .technology-content {
        grid-template-columns: 1fr;
    }

    .technology-features {
        grid-template-columns: 1fr 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

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

@media (max-width: 768px) {
    .nav-container {
        padding: 1rem 1.5rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1.5rem;
        gap: 0;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        border-bottom: 1px solid var(--border-subtle);
    }

    .nav-links li:last-child {
        border-bottom: none;
        margin-top: 1rem;
    }

    .nav-links a {
        display: block;
        padding: 1rem 0;
    }

    .nav-links a::after {
        display: none;
    }

    .nav-cta {
        text-align: center;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero, .products, .heritage, .applications, .cta {
        padding: 4rem 1.5rem;
    }

    .hero {
        padding-top: 6rem;
    }

    .applications-grid {
        grid-template-columns: 1fr;
    }

    .technology-features {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

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

    .page-header {
        padding: 8rem 1.5rem 3rem;
    }

    .page-content {
        padding: 3rem 1.5rem;
    }

    .lantern-diagram {
        width: 300px;
        height: 150px;
    }

    .diagram-labels {
        bottom: 30px;
    }

    .diagram-labels span:first-child,
    .diagram-labels span:last-child {
        font-size: 0.75rem;
    }
}