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

body {
    font-family: 'Georgia', 'Garamond', serif;
    line-height: 1.8;
    color: #2c2c2c;
    overflow-x: hidden;
    background: #fafaf8;
}

/* Header */
header {
    position: fixed;
    top: 0;
    width:100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(5px);
    border-bottom: 1px solid #d4c5a9;
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}

header.scrolled {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

nav {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.3rem;
    font-weight: 600;
    color: #8b4513;
    letter-spacing: 0.5px;
    font-family: 'Georgia', serif;
    text-align: center;
    line-height: 0.75;
}

.logo a {
    text-decoration: none;
    color: #8b4513;
}


/* Hamburger menu button - hidden on desktop */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background: #8b4513;
    transition: all 0.3s ease;
    border-radius: 3px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

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

.nav-links a {
    text-decoration: none;
    color: #4a4a4a;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 0;
    height: 1px;
    background: #8b4513;
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: #8b4513;
}

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

/* Hero Section */
.hero {
    margin-top: 70px;
    min-height: 85vh;
    /* background: linear-gradient(to bottom, #f5f1e8 0%, #fafaf8 100%); */
    background: 
        linear-gradient(to bottom, rgba(245, 241, 232, 0.05) 0%, rgba(250, 250, 248, 1.00) 100%),
        url('../images/warren_house_conference_centre_limited_cover.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: scroll; /* or 'fixed' for parallax effect */
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 2rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(212, 197, 169, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(212, 197, 169, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0;
    animation: fadeInGrid 2s ease forwards;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -1px; /* Extend 1px below */
    left: 0;
    right: 0;
    height: 50px;
    background: linear-gradient(to bottom, transparent, #fafaf8);
    z-index: 1;
}

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

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    opacity: 0;
    animation: fadeInUp 1.2s ease 0.3s forwards;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: 3rem 2.5rem;
    border-radius: 8px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: 0.95rem;
    color: #8b4513;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.hero h1 {
    font-size: 3.2rem;
    margin-bottom: 1.5rem;
    font-weight: 400;
    color: #2c2c2c;
    line-height: 1.3;
}

.hero-tagline {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    color: #5a5a5a;
    font-style: italic;
    font-weight: 300;
}

.hero-date {
    font-size: 1.05rem;
    margin-bottom: 2.5rem;
    color: #4a4a4a;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.cta-button {
    display: inline-block;
    padding: 0.9rem 2.5rem;
    background: #8b4513;
    color: white;
    text-decoration: none;
    border: 2px solid #8b4513;
    font-weight: 500;
    transition: all 0.3s ease;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.95rem;
}

.cta-button:hover {
    background: transparent;
    color: #8b4513;
    transform: translateY(-2px);
}

/* Scope Section */
.scope-section {
    padding: 6rem 2rem;
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-top: 1px solid #e8e4dc;
    border-bottom: 1px solid #e8e4dc;
}

.scope-header {
    text-align: center;
    margin-bottom: 3rem;
    opacity: 0;
    animation: fadeIn 1s ease forwards;
}

.scope-header h2 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    color: #2c2c2c;
    font-weight: 400;
}

.scope-intro {
    font-size: 1.1rem;
    color: #5a5a5a;
    line-height: 1.9;
    margin-bottom: 3rem;
    text-align: center;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* .topic-item:hover {
    background: white;
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.topic-item h3 {
    font-size: 1.1rem;
    color: #8b4513;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.topic-item p {
    font-size: 0.95rem;
    color: #5a5a5a;
    line-height: 1.6;
} */

/* Venue Section */
.venue-section {
    padding: 6rem 2rem;
    max-width: 1100px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
    opacity: 0;
    animation: fadeIn 1s ease forwards;
}

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

.section-title {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    color: #2c2c2c;
    font-weight: 400;
}

.section-subtitle {
    font-size: 1.1rem;
    color: #6a6a6a;
    font-style: italic;
    font-weight: 300;
}

.venue-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.venue-card {
    background: white;
    border: 1px solid #e8e4dc;
    overflow: hidden;
    transition: all 0.4s ease;
    opacity: 0;
    animation: slideIn 0.8s ease forwards;
}

.venue-card:nth-child(1) {
    animation-delay: 0.2s;
}

.venue-card:nth-child(2) {
    animation-delay: 0.4s;
}

.venue-card:nth-child(3) {
    animation-delay: 0.6s;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.venue-card:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    transform: translateY(-5px);
}

.venue-image {
    width: 100%;
    height: 280px;
    background: linear-gradient(135deg, #e8e4dc 0%, #f5f1e8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #8b4513;
    font-size: 4rem;
    transition: transform 0.4s ease;
}

.venue-image img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* or 'contain' depending on your preference */
}

.venue-card:hover .venue-image {
    transform: scale(1.03);
}

.venue-info {
    padding: 2rem;
}

.venue-info h3 {
    margin-bottom: 0.8rem;
    color: #2c2c2c;
    font-weight: 500;
    font-size: 1.3rem;
}

.venue-info p {
    color: #5a5a5a;
    font-size: 0.98rem;
    line-height: 1.7;
}

/* Organisers Section */
.organisers-section {
    background: white;
    border-top: 1px solid #e8e4dc;
    border-bottom: 1px solid #e8e4dc;
    padding: 6rem 2rem;
    position: relative;
}

.organisers-section .section-header {
    text-align: center;
    margin-bottom: 4rem;
    opacity: 0;
    animation: fadeIn 1s ease forwards;
}

.organisers-container {
    position: relative;
    max-width: 1100px;
    margin: 0 auto;
}

.scroll-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    pointer-events: none;
    z-index: 10;
    padding: 0 1rem;
}

.scroll-btn {
    background: rgba(139, 69, 19, 0.7);
    color: white;
    border: none;
    padding: 0;
    border-radius: 50%;
    cursor: pointer;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 1.0rem;
    transition: all 0.3s ease;
    pointer-events: auto;
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.scroll-btn:hover {
    background: rgba(139, 69, 19, 0.9);
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

.scroll-btn:disabled {
    background: rgba(212, 197, 169, 0.0);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Fade effect for cards at edges - fixed on container */
.organisers-container::before,
.organisers-container::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2rem;
    /* width: 150px; */
    pointer-events: none;
    z-index: 5;
}

.organisers-container::before {
    left: 0;
    background: linear-gradient(to right, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0.8) 50%, rgba(255, 255, 255, 0) 100%);
}

.organisers-container::after {
    right: 0;
    background: linear-gradient(to left, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0.8) 50%, rgba(255, 255, 255, 0) 100%);
}

.organisers-grid {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    overflow-x: auto;
    gap: 2.5rem;
    padding: 1rem 0;
    transition: all 0.4s ease;
    scroll-behavior: smooth;
    scroll-snap-type: x mandatory;
    /* hide the scrollbar */
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
    -webkit-overflow-scrolling: touch;
    position: relative;
}

/* Custom scrollbar styling */
.organisers-grid::-webkit-scrollbar {
    height: 8px;
    /* hide scrollbar */
    display: none; /* Chrome, Safari, Opera */
}

.organisers-grid::-webkit-scrollbar-track {
    background: #e8e4dc;
    border-radius: 10px;
}

.organisers-grid::-webkit-scrollbar-thumb {
    background: #8b4513;
    border-radius: 10px;
}

.organisers-grid::-webkit-scrollbar-thumb:hover {
    background: #6d3510;
}

.organiser-card {
    background: #fafaf8;
    border: 1px solid #e8e4dc;
    padding: 2rem;
    text-align: center;
    transition: all 0.8s ease;
    opacity: 0;
    /* animation: fadeInUp 0.8s ease forwards; */
    min-width: 280px;
    /* min-width: 10rem; */
    flex-shrink: 0;
    scroll-snap-align: start;
    /* transform: translateY(30px); */
}

.organiser-card.is-visible {
    /* opacity: 1; */
    transform: translateY(0);
    animation: fadeInUp 0.8s ease forwards;
}

/* .organiser-card:nth-child(n) {
    animation-delay: calc(0.2s * (var(--index) - 1));
} */

/* .organiser-card:nth-child(n) {
    transition-delay: calc(0.1s * (var(--index) - 1));
} */

.organiser-card:nth-child(n).is-visible {
    animation-delay: calc(0.2s * (var(--index) - 1));
    /* transition-delay: 0.1s; */
    /* transition-delay: calc(0.5s * (var(--index) - 1)); */
}

.organiser-card:hover {
    background: white;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
    transform: translateY(-5px);
}

.organiser-filler {
    background: #fafaf8;
    border: 1px solid #e8e4dc;
    padding: 1rem;
    transition: all 0.4s ease;
    opacity: 0;
    /* width: 2rem; */
    min-width: 2rem;
    /* min-width: 100px; */
    flex-shrink: 0;
    scroll-snap-align: start;
}

.organiser-photo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, #d4c5a9 0%, #e8e4dc 100%);
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: #8b4513;
    transition: transform 0.3s ease;
    overflow: hidden;
    position: relative;
}

.organiser-photo img {
    width: 120px;
    height: 120px;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
}

.organiser-card:hover .organiser-photo {
    transform: scale(1.05);
}

.organiser-name {
    font-size: 1.2rem;
    font-weight: 500;
    color: #2c2c2c;
    margin-bottom: 0.3rem;
}

.organiser-title {
    font-size: 0.95rem;
    color: #8b4513;
    margin-bottom: 0.5rem;
    font-style: italic;
}

.organiser-affiliation {
    font-size: 0.9rem;
    color: #6a6a6a;
    line-height: 1.6;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Sponsor Boxes */

.sponsor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.sponsor-card {
    background: white;
    border: 1px solid #e8e4dc;
    overflow: hidden;
    transition: all 0.4s ease;
    opacity: 0;
    animation: slideIn 0.8s ease forwards;
}

.sponsor-card:nth-child(1) {
    animation-delay: 0.2s;
}

.sponsor-card:nth-child(2) {
    animation-delay: 0.4s;
}

.sponsor-card:nth-child(3) {
    animation-delay: 0.6s;
}

.sponsor-card:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    transform: translateY(-5px);
}

.sponsor-image {
    width: 100%;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #8b4513;
    font-size: 4rem;
    transition: transform 0.4s ease;
}

.sponsor-image img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* or 'contain' depending on your preference */
}

/* Footer */
footer {
    background: #2c2c2c;
    color: #d0d0d0;
    text-align: center;
    padding: 2.5rem 2rem;
}

footer p {
    font-size: 0.9rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-tagline {
        font-size: 1.1rem;
    }

    .nav-links {
        gap: 1.5rem;
        font-size: 0.9rem;
    }

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

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

    .section-title {
        font-size: 1.8rem;
    }
}

/* Mobile */

@media (max-width: 768px) {
    /* Show hamburger menu on mobile */
    .hamburger {
        display: flex;
    }
    
    /* Hide nav links by default on mobile */
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        padding: 2rem;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        transform: translateX(100%);
        transition: transform 0.3s ease;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }
    
    /* Show nav links when active */
    .nav-links.active {
        transform: translateX(0);
    }
    
    .nav-links li {
        border-bottom: 1px solid #e8e4dc;
        padding: 1rem 0;
    }
    
    .nav-links li:last-child {
        border-bottom: none;
    }
    
    .nav-links a {
        display: block;
        font-size: 1.1rem;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-tagline {
        font-size: 1.1rem;
    }

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

    .section-title {
        font-size: 1.8rem;
    }
}

/* Scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Smooth scroll reveal for sections */
.fade-in-section {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94), 
                transform 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.fade-in-section.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Parallax hero effect */
.hero {
    will-change: transform;
    transition: transform 0.1s ease-out;
}

/* Enhanced smooth transitions */
* {
    scroll-behavior: smooth;
}

/* Easing for all animations */
section {
    transition: opacity 0.6s ease, transform 0.6s ease;
}