/* ===============================================
   COLLNET 2026 Conference Website
   Premium Elegant Design
   =============================================== */

/* CSS Variables - Elegant Color Palette */
:root {
    --primary-color: #0c4a6e;
    --primary-dark: #075985;
    --secondary-color: #0284c7;
    --secondary-light: #38bdf8;
    --accent-color: #f59e0b;
    --accent-light: #fbbf24;
    --accent-dark: #d97706;
    --dark-blue: #0f172a;
    --dark-navy: #1e293b;
    --light-blue: #e0f2fe;
    --light-sky: #f0f9ff;
    --text-dark: #0f172a;
    --text-medium: #334155;
    --text-light: #64748b;
    --white: #ffffff;
    --off-white: #f8fafc;
    --gradient-1: linear-gradient(135deg, #0c4a6e 0%, #0284c7 50%, #0ea5e9 100%);
    --gradient-2: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    --gradient-3: linear-gradient(135deg, rgba(12, 74, 110, 0.95) 0%, rgba(2, 132, 199, 0.95) 100%);
    --shadow-sm: 0 2px 8px rgba(12, 74, 110, 0.08);
    --shadow-md: 0 4px 16px rgba(12, 74, 110, 0.12);
    --shadow-lg: 0 8px 32px rgba(12, 74, 110, 0.16);
    --shadow-xl: 0 16px 48px rgba(12, 74, 110, 0.2);
    --shadow-glow: 0 0 40px rgba(245, 158, 11, 0.3);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-elegant: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    overflow-x: hidden;
    background: var(--off-white);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-smooth);
}

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

/* Elegant Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

/* Section Styles */
.section {
    padding: 120px 0;
    position: relative;
}

.section-alt {
    background: linear-gradient(180deg, var(--light-sky) 0%, var(--off-white) 100%);
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 20px;
    letter-spacing: -0.03em;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background: var(--gradient-2);
    border-radius: 3px;
    box-shadow: var(--shadow-glow);
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.25rem;
    margin-bottom: 4rem;
    font-weight: 400;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Navigation Bar - Elegant Design */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    z-index: 1000;
    transition: var(--transition-smooth);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(245, 158, 11, 0.5), transparent);
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: var(--shadow-lg);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 24px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-img {
    height: 55px;
    width: auto;
    transition: var(--transition-smooth);
}

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

.brand-text {
    color: var(--white);
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #ffffff 0%, #f59e0b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 8px;
    transition: var(--transition-smooth);
    position: relative;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 30px;
    height: 2px;
    background: var(--accent-color);
    border-radius: 2px;
    transition: var(--transition-smooth);
}

.nav-link:hover {
    color: var(--white);
    background: rgba(255, 255, 255, 0.1);
}

.nav-link:hover::before {
    transform: translateX(-50%) scaleX(1);
}

.nav-link.active {
    color: var(--accent-color);
    background: rgba(245, 158, 11, 0.1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 6px;
}

.nav-toggle span {
    width: 28px;
    height: 3px;
    background: var(--white);
    border-radius: 3px;
    transition: var(--transition-smooth);
}

/* Hero Section - Premium Design */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0c4a6e 0%, #0284c7 50%, #0ea5e9 100%);
    padding-top: 90px;
    overflow: hidden;
}

/* Network Background Canvas */
.network-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.network-node {
    position: absolute;
    width: 12px;
    height: 12px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.4);
    animation: nodePulse 3s ease-in-out infinite;
}

.network-node:nth-child(2n) {
    animation-delay: 0.5s;
}

.network-node:nth-child(3n) {
    animation-delay: 1s;
}

.network-node:nth-child(4n) {
    animation-delay: 1.5s;
}

@keyframes nodePulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.6;
    }
    50% {
        transform: scale(1.3);
        opacity: 1;
    }
}

.network-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.network-line {
    stroke: rgba(255, 255, 255, 0.15);
    stroke-width: 0.2;
    animation: lineGlow 4s ease-in-out infinite;
}

.network-line:nth-child(2n) {
    animation-delay: 1s;
}

@keyframes lineGlow {
    0%, 100% {
        stroke-opacity: 0.15;
    }
    50% {
        stroke-opacity: 0.4;
    }
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(245, 158, 11, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(14, 165, 233, 0.12) 0%, transparent 50%);
    animation: backgroundPulse 20s ease-in-out infinite;
    z-index: 1;
}

@keyframes backgroundPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.04) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(255, 255, 255, 0.04) 0%, transparent 20%);
    pointer-events: none;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(12, 74, 110, 0.15);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    color: var(--white);
    padding: 60px 24px;
    width: 100%;
}

/* Hero Branding Section */
.hero-branding {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto 50px;
    padding: 0 20px;
    gap: 30px;
}

.collnet-logo-container {
    flex: 1;
    display: flex;
    justify-content: flex-start;
    align-items: center;
}

.collnet-logo {
    height: 80px;
    width: auto;
    max-width: 100%;
    filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.3));
    transition: var(--transition-smooth);
}

.collnet-logo:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 6px 30px rgba(245, 158, 11, 0.5));
}

.university-logo-container {
    flex: 0 0 auto;
    background: rgba(255, 255, 255, 0.95);
    padding: 12px 28px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: var(--transition-smooth);
}

.university-logo-container:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.university-logo {
    height: 65px;
    width: auto;
    display: block;
}

/* Hero Main Content */
.hero-main {
    margin: 60px 0 40px;
}

.hero-country {
    font-size: 5.5rem;
    font-weight: 900;
    margin-bottom: 16px;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
    letter-spacing: -0.03em;
    line-height: 1;
    background: linear-gradient(180deg, #ffffff 0%, #f0f9ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: 2.2rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 2px 15px rgba(0, 0, 0, 0.3);
    letter-spacing: 0.02em;
    margin: 0;
}

/* Conference Info Box */
.conference-info-box {
    max-width: 900px;
    margin: 0 auto 40px;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-radius: 20px;
    padding: 32px 48px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.conference-title {
    font-size: 1.75rem;
    font-weight: 600;
    line-height: 1.5;
    margin-bottom: 16px;
    color: var(--white);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.conference-title sup {
    font-size: 1rem;
    font-weight: 700;
}

.conference-venue {
    font-size: 1.3rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
}

/* Date Badge */
.date-badge {
    display: inline-block;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    padding: 28px 60px;
    margin: 0 auto 50px;
    box-shadow: 0 10px 40px rgba(245, 158, 11, 0.4), 0 0 60px rgba(245, 158, 11, 0.2);
    position: relative;
    overflow: hidden;
}

.date-badge::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    animation: badgeShine 3s ease-in-out infinite;
}

@keyframes badgeShine {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.badge-header {
    font-size: 3.5rem;
    font-weight: 900;
    color: #0f172a;
    letter-spacing: -0.02em;
    line-height: 1;
    margin-bottom: 8px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.badge-date {
    font-size: 1.8rem;
    font-weight: 700;
    color: #0f172a;
    letter-spacing: 0.05em;
}

/* Hero CTA Buttons */
.hero-cta {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Responsive Hero */
@media (max-width: 968px) {
    .hero-branding {
        flex-direction: column;
        gap: 24px;
        align-items: center;
    }
    
    .collnet-logo-container {
        justify-content: center;
    }
    
    .collnet-logo {
        height: 70px;
    }
    
    .university-logo {
        height: 55px;
    }
    
    .hero-country {
        font-size: 3.5rem;
    }
    
    .hero-tagline {
        font-size: 1.6rem;
    }
    
    .conference-title {
        font-size: 1.3rem;
    }
    
    .conference-info-box {
        padding: 24px 32px;
    }
    
    .date-badge {
        padding: 20px 40px;
    }
    
    .badge-header {
        font-size: 2.5rem;
    }
    
    .badge-date {
        font-size: 1.4rem;
    }
}

@media (max-width: 600px) {
    .collnet-logo {
        height: 60px;
    }
    
    .university-logo-container {
        padding: 10px 20px;
    }
    
    .university-logo {
        height: 45px;
    }
    
    .hero-country {
        font-size: 2.5rem;
    }
    
    .hero-tagline {
        font-size: 1.2rem;
    }
    
    .conference-title {
        font-size: 1.1rem;
    }
    
    .conference-venue {
        font-size: 1rem;
    }
    
    .conference-info-box {
        padding: 20px 24px;
    }
    
    .date-badge {
        padding: 16px 32px;
    }
    
    .badge-header {
        font-size: 2rem;
    }
    
    .badge-date {
        font-size: 1.2rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-cta .btn {
        width: 100%;
        max-width: 320px;
    }
}

/* Animation Classes */
.animate-fade-in {
    animation: fadeIn 1s ease-out;
}

.animate-fade-in-delay-1 {
    animation: fadeIn 1s ease-out 0.2s both;
}

.animate-fade-in-delay-2 {
    animation: fadeIn 1s ease-out 0.4s both;
}

.animate-fade-in-delay-3 {
    animation: fadeIn 1s ease-out 0.6s both;
}

.animate-fade-in-delay-4 {
    animation: fadeIn 1s ease-out 0.8s both;
}

.animate-fade-in-delay-5 {
    animation: fadeIn 1s ease-out 1s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Premium Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 48px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition-smooth);
    cursor: pointer;
    border: none;
    text-align: center;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.01em;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: var(--dark-blue);
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(245, 158, 11, 0.5);
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.2);
}

.btn-lg {
    padding: 20px 60px;
    font-size: 1.25rem;
    border-radius: 14px;
}

/* About Section - Elegant Layout */
.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 60px;
}

.about-text p {
    font-size: 1.15rem;
    line-height: 1.9;
    color: var(--text-medium);
    margin-bottom: 24px;
    font-weight: 400;
}

.about-text p:first-of-type::first-letter {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
    float: left;
    margin: 0 10px 0 0;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-top: 40px;
}

.highlight-card {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-elegant);
    border: 1px solid rgba(12, 74, 110, 0.1);
    position: relative;
    overflow: hidden;
}

.highlight-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: var(--transition-smooth);
}

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

.highlight-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--secondary-color);
}

.highlight-card i {
    font-size: 3.5rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    display: inline-block;
    transition: var(--transition-smooth);
}

.highlight-card:hover i {
    transform: scale(1.1) rotateY(360deg);
}

.highlight-card h3 {
    color: var(--primary-color);
    margin-bottom: 12px;
    font-size: 1.4rem;
    font-weight: 700;
}

.highlight-card p {
    color: var(--text-light);
    font-size: 1.05rem;
    line-height: 1.6;
}

/* Tracks Section - Premium Cards */
.tracks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 36px;
}

.track-card {
    background: var(--white);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-elegant);
    border: 1px solid rgba(12, 74, 110, 0.08);
    position: relative;
    overflow: hidden;
}

.track-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-smooth);
}

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

.track-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(2, 132, 199, 0.05) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition-elegant);
    pointer-events: none;
}

.track-card:hover::after {
    opacity: 1;
}

.track-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--secondary-light);
}

.track-header {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 20px;
}

.track-header i {
    font-size: 2.5rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    flex-shrink: 0;
    transition: var(--transition-smooth);
}

.track-card:hover .track-header i {
    transform: scale(1.15);
}

.track-header h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
    line-height: 1.4;
    font-weight: 700;
}

.track-focus {
    font-weight: 600;
    color: var(--text-medium);
    font-style: italic;
    margin-bottom: 20px;
    padding-left: 20px;
    border-left: 4px solid var(--accent-color);
    background: linear-gradient(90deg, rgba(245, 158, 11, 0.05) 0%, transparent 100%);
    padding: 12px 20px;
    border-radius: 0 8px 8px 0;
}

.track-topics {
    list-style: none;
    padding-left: 0;
}

.track-topics li {
    padding: 12px 0;
    padding-left: 32px;
    position: relative;
    color: var(--text-light);
    font-size: 1.05rem;
    transition: var(--transition-fast);
}

.track-topics li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
    font-size: 1.2rem;
    transition: var(--transition-fast);
}

.track-topics li:hover {
    color: var(--primary-color);
    padding-left: 36px;
}

.track-topics li:hover::before {
    color: var(--accent-color);
    transform: translateX(4px);
}

/* Timeline Styles - Premium Design */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--secondary-color), var(--accent-color));
    border-radius: 2px;
    box-shadow: 0 0 20px rgba(2, 132, 199, 0.3);
}

.timeline-item {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-bottom: 60px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--white);
    border: 4px solid var(--secondary-color);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(2, 132, 199, 0.5);
    z-index: 1;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-date {
    flex: 0 0 140px;
    text-align: center;
}

.date-box {
    background: var(--white);
    border: 3px solid var(--secondary-color);
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--shadow-md);
    display: inline-block;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.date-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(2, 132, 199, 0.1), transparent);
    transition: left 0.6s;
}

.date-box:hover::before {
    left: 100%;
}

.date-box:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.date-box.featured {
    background: var(--gradient-2);
    border-color: var(--accent-color);
    animation: pulse 2s ease-in-out infinite;
    box-shadow: var(--shadow-glow);
}

@keyframes pulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 0 0 20px rgba(245, 158, 11, 0.4);
    }
    50% { 
        transform: scale(1.05);
        box-shadow: 0 0 40px rgba(245, 158, 11, 0.6);
    }
}

.day {
    display: block;
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary-color);
    line-height: 1;
    letter-spacing: -0.02em;
}

.featured .day {
    color: var(--dark-blue);
}

.month {
    display: block;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 4px;
}

.featured .month {
    color: var(--dark-blue);
}

.timeline-content {
    flex: 1;
    background: var(--white);
    padding: 32px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-elegant);
    border: 1px solid rgba(12, 74, 110, 0.1);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 0;
    height: 0;
    border: 10px solid transparent;
    transform: translateY(-50%);
}

.timeline-item:nth-child(odd) .timeline-content::before {
    right: 100%;
    border-right-color: var(--white);
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: 100%;
    border-left-color: var(--white);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--secondary-light);
}

.timeline-item.highlight .timeline-content {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border: 2px solid var(--accent-color);
}

.timeline-item.highlight .timeline-content::before {
    border-right-color: #fef3c7;
    border-left-color: #fef3c7;
}

.timeline-content h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.35rem;
    font-weight: 700;
}

.timeline-content p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 1.05rem;
}

.publication-note {
    background: linear-gradient(135deg, var(--light-blue), #bfdbfe);
    border: 2px solid var(--secondary-color);
    border-radius: 20px;
    padding: 32px;
    margin-top: 60px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-smooth);
}

.publication-note:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.publication-note i {
    font-size: 2.5rem;
    color: var(--accent-color);
    flex-shrink: 0;
}

.publication-note p {
    margin: 0;
    font-size: 1.15rem;
    color: var(--text-dark);
    font-weight: 500;
    line-height: 1.6;
}

/* Registration Section - Premium Tables */
.registration-tables {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(480px, 1fr));
    gap: 48px;
    margin-bottom: 60px;
}

.reg-table-wrapper {
    background: var(--white);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-elegant);
    border: 1px solid rgba(12, 74, 110, 0.1);
}

.reg-table-wrapper:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.table-title {
    padding: 28px;
    color: var(--white);
    text-align: center;
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    position: relative;
    overflow: hidden;
}

.table-title::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.8s;
}

.reg-table-wrapper:hover .table-title::before {
    left: 100%;
}

.table-title.early-bird {
    background: var(--gradient-1);
}

.table-title.normal {
    background: linear-gradient(135deg, #059669, #10b981);
}

.reg-table {
    width: 100%;
    border-collapse: collapse;
}

.reg-table thead {
    background: linear-gradient(135deg, var(--light-blue), #dbeafe);
}

.reg-table th {
    padding: 20px;
    text-align: left;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: 0.01em;
}

.reg-table td {
    padding: 20px;
    border-bottom: 1px solid #f1f5f9;
    color: var(--text-dark);
    font-size: 1.05rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.reg-table tbody tr {
    transition: var(--transition-fast);
}

.reg-table tbody tr:hover {
    background: linear-gradient(90deg, rgba(2, 132, 199, 0.03), transparent);
}

.reg-table tbody tr:last-child td {
    border-bottom: none;
}

.registration-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.benefits-card {
    background: var(--white);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-elegant);
    border: 1px solid rgba(12, 74, 110, 0.1);
    position: relative;
    overflow: hidden;
}

.benefits-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: var(--gradient-1);
}

.premium-benefits::before {
    background: var(--gradient-2);
}

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

.benefits-card h3 {
    color: var(--primary-color);
    margin-bottom: 28px;
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
}

.benefits-card h3 i {
    font-size: 1.8rem;
    color: var(--secondary-color);
}

.premium-benefits h3 i {
    color: var(--accent-color);
}

.benefits-card ul {
    list-style: none;
    padding: 0;
}

.benefits-card li {
    padding: 16px 0;
    padding-left: 40px;
    position: relative;
    color: var(--text-light);
    font-size: 1.05rem;
    line-height: 1.6;
    border-bottom: 1px solid #f1f5f9;
    transition: var(--transition-fast);
}

.benefits-card li:last-child {
    border-bottom: none;
}

.benefits-card li:hover {
    color: var(--primary-color);
    padding-left: 44px;
}

.benefits-card li i {
    position: absolute;
    left: 0;
    top: 18px;
    color: var(--secondary-color);
    font-size: 1.4rem;
    transition: var(--transition-fast);
}

.benefits-card li:hover i {
    transform: scale(1.2);
}

.premium-benefits li i {
    color: var(--accent-color);
}

/* Submission Section - Premium Design */
.submission-content {
    max-width: 1100px;
    margin: 0 auto;
}

.submission-types h3,
.submission-requirements h3,
.publication-opportunities h3 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 32px;
    text-align: center;
    font-weight: 800;
}

.format-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 28px;
    margin-bottom: 60px;
}

.format-card {
    background: linear-gradient(135deg, var(--light-sky), #dbeafe);
    border: 2px solid var(--secondary-color);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    transition: var(--transition-elegant);
    position: relative;
    overflow: hidden;
}

.format-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition-smooth);
}

.format-card:hover::before {
    opacity: 1;
    transform: scale(1.5);
}

.format-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-color);
}

.format-card i {
    font-size: 3.5rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    display: inline-block;
    transition: var(--transition-smooth);
}

.format-card:hover i {
    transform: rotateY(360deg) scale(1.1);
}

.format-card h4 {
    color: var(--primary-color);
    margin-bottom: 12px;
    font-size: 1.4rem;
    font-weight: 700;
}

.format-card p {
    color: var(--text-medium);
    font-weight: 600;
    font-size: 1.05rem;
}

.req-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
    margin-bottom: 60px;
}

.req-item {
    background: var(--white);
    border: 2px solid var(--light-blue);
    border-radius: 18px;
    padding: 32px;
    text-align: center;
    transition: var(--transition-elegant);
    box-shadow: var(--shadow-sm);
}

.req-item:hover {
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}

.req-item i {
    font-size: 3rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    display: inline-block;
    transition: var(--transition-smooth);
}

.req-item:hover i {
    transform: scale(1.15);
}

.req-item h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.2rem;
    font-weight: 700;
}

.req-item p {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.6;
}

.pub-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
}

.pub-card {
    background: var(--white);
    border: 2px solid var(--light-blue);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    transition: var(--transition-elegant);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.pub-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: var(--transition-smooth);
}

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

.pub-card.highlight {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border-color: var(--accent-color);
    border-width: 3px;
}

.pub-card.highlight::before {
    background: var(--gradient-2);
}

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

.pub-card i {
    font-size: 3.5rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    display: inline-block;
    transition: var(--transition-smooth);
}

.pub-card.highlight i {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pub-card:hover i {
    transform: scale(1.15) rotateY(360deg);
}

.pub-card h4 {
    color: var(--primary-color);
    margin-bottom: 16px;
    font-size: 1.4rem;
    font-weight: 700;
}

.pub-card p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 1.05rem;
}

.awards-info {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border: 3px solid var(--accent-color);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    margin-bottom: 50px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-smooth);
}

.awards-info:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.awards-info h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.8rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.awards-info h3 i {
    color: var(--accent-color);
    font-size: 2rem;
}

.awards-info p {
    color: var(--text-dark);
    font-size: 1.15rem;
    line-height: 1.7;
    margin: 0;
    font-weight: 500;
}

.submission-button {
    text-align: center;
}

.submission-email {
    margin-top: 20px;
    color: var(--text-light);
    font-size: 1.15rem;
    font-weight: 500;
}

/* Committee Section - Premium Design */
.committee-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 36px;
}

.committee-member {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-elegant);
    border: 1px solid rgba(12, 74, 110, 0.1);
    position: relative;
    overflow: hidden;
}

.committee-member::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: var(--transition-smooth);
}

.committee-member:hover::before {
    transform: scaleX(1);
}

.committee-member:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--secondary-light);
}

.member-photo {
    margin-bottom: 24px;
    position: relative;
    width: 160px;
    height: 160px;
    margin-left: auto;
    margin-right: auto;
}

.member-photo i {
    font-size: 6rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: var(--transition-smooth);
}

.member-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--light-blue);
    box-shadow: 0 8px 24px rgba(12, 74, 110, 0.15);
    transition: var(--transition-smooth);
    display: block;
}

.committee-member:hover .member-image {
    transform: scale(1.05);
    border-color: var(--secondary-color);
    box-shadow: 0 12px 32px rgba(2, 132, 199, 0.3);
}

.committee-member:hover .member-photo i {
    transform: scale(1.1);
}

.committee-member h3 {
    color: var(--primary-color);
    margin-bottom: 12px;
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.3;
}

.member-role {
    color: var(--text-medium);
    font-weight: 600;
    margin-bottom: 10px;
    font-size: 1.05rem;
}

.member-affiliation {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Contact Section - Premium Design */
.contact-content {
    max-width: 1100px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
}

.contact-card {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-elegant);
    border: 1px solid rgba(12, 74, 110, 0.1);
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: var(--transition-smooth);
}

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

.contact-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--secondary-light);
}

.contact-card i {
    font-size: 3.5rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    display: inline-block;
    transition: var(--transition-smooth);
}

.contact-card:hover i {
    transform: scale(1.15) rotateY(360deg);
}

.contact-card h3 {
    color: var(--primary-color);
    margin-bottom: 16px;
    font-size: 1.4rem;
    font-weight: 700;
}

.contact-card p {
    color: var(--text-light);
    margin-bottom: 8px;
    font-size: 1.05rem;
}

.contact-card a {
    color: var(--secondary-color);
    font-weight: 600;
    transition: var(--transition-fast);
}

.contact-card a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.venue-info {
    background: linear-gradient(135deg, var(--light-sky), #dbeafe);
    border: 2px solid var(--secondary-color);
    border-radius: 24px;
    padding: 50px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-smooth);
}

.venue-info:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.venue-info h3 {
    color: var(--primary-color);
    margin-bottom: 24px;
    font-size: 2rem;
    font-weight: 800;
}

.venue-info p {
    color: var(--text-dark);
    font-size: 1.15rem;
    line-height: 1.9;
    margin-bottom: 20px;
    font-weight: 400;
}

/* Footer - Elegant Design */
.footer {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--white);
    padding: 80px 0 30px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(245, 158, 11, 0.5), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 50px;
    margin-bottom: 50px;
}

.footer-section h4 {
    color: var(--accent-light);
    margin-bottom: 24px;
    font-size: 1.3rem;
    font-weight: 700;
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section ul li {
    margin-bottom: 14px;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-fast);
    font-size: 1.05rem;
}

.footer-section a:hover {
    color: var(--accent-light);
    padding-left: 8px;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 12px;
    font-size: 1.05rem;
}

.footer-section p i {
    margin-right: 12px;
    color: var(--accent-light);
}

.footer-logo {
    height: 70px;
    margin-bottom: 24px;
    filter: brightness(0) invert(1);
    transition: var(--transition-smooth);
}

.footer-logo:hover {
    transform: scale(1.05);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 32px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
    font-size: 1rem;
}

/* Scroll to Top Button - Premium */
.scroll-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    background: var(--gradient-2);
    color: var(--dark-blue);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transition: var(--transition-smooth);
    z-index: 999;
}

.scroll-top:hover {
    transform: translateY(-6px) scale(1.05);
    box-shadow: var(--shadow-xl), 0 0 60px rgba(245, 158, 11, 0.5);
}

.scroll-top.show {
    display: flex;
    animation: slideInUp 0.4s ease-out;
}

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

/* Submission Resources Section - Professional Design */
.submission-resources {
    margin: 60px 0;
    padding: 50px;
    background: linear-gradient(135deg, var(--light-sky), #ffffff);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    border: 2px solid rgba(2, 132, 199, 0.1);
}

.resources-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 12px;
    text-align: center;
}

.resources-title i {
    color: var(--accent-color);
    margin-right: 12px;
}

.resources-description {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.resource-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.resource-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--white);
    padding: 30px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-smooth);
    border: 2px solid transparent;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.resource-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: var(--gradient-1);
    transform: scaleY(0);
    transition: var(--transition-smooth);
}

.resource-card:hover::before {
    transform: scaleY(1);
}

.resource-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--secondary-light);
}

.resource-icon {
    width: 70px;
    height: 70px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    flex-shrink: 0;
    transition: var(--transition-smooth);
}

.pdf-icon {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(239, 68, 68, 0.3);
}

.word-icon {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.resource-card:hover .resource-icon {
    transform: scale(1.1) rotate(5deg);
}

.resource-content {
    flex: 1;
}

.resource-content h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.resource-content p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 12px;
    line-height: 1.5;
}

.resource-meta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-medium);
    background: var(--light-blue);
    padding: 6px 14px;
    border-radius: 20px;
    font-weight: 600;
}

.resource-meta i {
    font-size: 0.9rem;
}

.resource-download {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--dark-blue);
    flex-shrink: 0;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
}

.resource-card:hover .resource-download {
    transform: scale(1.15);
    box-shadow: var(--shadow-glow);
}

/* Responsive Design */
@media (max-width: 968px) {
    /* Navigation - Ensure always visible */
    .navbar {
        display: block !important;
        visibility: visible !important;
        opacity: 1 !important;
        background: rgba(15, 23, 42, 0.98) !important;
        z-index: 1000;
    }
    
    .nav-container {
        padding: 1rem 16px;
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
    }
    
    .nav-brand {
        display: flex !important;
        align-items: center !important;
        gap: 12px;
        z-index: 1001;
    }
    
    .logo-img {
        height: 45px;
    }
    
    .brand-text {
        font-size: 1.3rem;
        display: block !important;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 86px;
        flex-direction: column;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        width: 100%;
        text-align: center;
        transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        padding: 30px 0;
        gap: 0;
        box-shadow: var(--shadow-xl);
        z-index: 999;
        max-height: calc(100vh - 86px);
        overflow-y: auto;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-link {
        display: block;
        padding: 16px;
        width: 100%;
        font-size: 1.05rem;
    }

    .nav-toggle {
        display: flex !important;
        z-index: 1001;
        position: relative;
    }

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

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }

    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        font-size: 1.5rem;
    }

    .hero-conference {
        font-size: 1.2rem;
    }

    .hero-date {
        padding: 30px 40px;
    }

    .hero-date h2 {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2.2rem;
    }

    .section {
        padding: 80px 0;
    }

    .timeline::before {
        left: 40px;
    }

    .timeline-item,
    .timeline-item:nth-child(even) {
        flex-direction: row;
        padding-left: 100px;
    }

    .timeline-date {
        position: absolute;
        left: 0;
    }

    .timeline-item::before {
        left: 49px;
    }

    .registration-tables {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 600px) {
    .container {
        padding: 0 16px;
    }

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

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-conference {
        font-size: 1rem;
    }

    .hero-date {
        padding: 24px 32px;
    }

    .hero-date h2 {
        font-size: 2rem;
    }

    .date-text {
        font-size: 1.2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        max-width: 320px;
    }

    .section {
        padding: 60px 0;
    }

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

    .format-cards,
    .req-grid,
    .pub-cards {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .format-card,
    .req-item {
        padding: 24px;
    }
    
    .format-card h4,
    .req-item h4 {
        font-size: 1.2rem;
    }
    
    .format-card i,
    .req-item i {
        font-size: 2.5rem;
    }
    
    .format-card p,
    .req-item p {
        font-size: 0.95rem;
    }

    .about-highlights,
    .contact-info,
    .committee-grid {
        grid-template-columns: 1fr;
    }

    .registration-benefits {
        grid-template-columns: 1fr;
    }

    .resource-cards {
        grid-template-columns: 1fr;
    }

    .resource-card {
        padding: 24px;
    }

    .resource-icon {
        width: 60px;
        height: 60px;
        font-size: 1.8rem;
    }

    .scroll-top {
        width: 48px;
        height: 48px;
        bottom: 24px;
        right: 24px;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .scroll-top,
    .hero-buttons {
        display: none;
    }

    .section {
        page-break-inside: avoid;
    }
}

/* Hero Full Width Banner with Overlay Buttons */
.hero-full-banner {
    position: relative;
    width: 100%;
    margin-top: 86px;
}

.banner-wrapper {
    position: relative;
    width: 100%;
}

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

.banner-buttons-overlay {
    position: absolute;
    top: 55%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    gap: 24px;
    z-index: 100;
}

@media (max-width: 768px) {
    .hero-full-banner {
        margin-top: 80px;
    }
    
    /* Move buttons below banner on mobile */
    .banner-wrapper {
        position: relative;
    }
    
    .banner-buttons-overlay {
        position: relative;
        top: 0;
        left: 0;
        transform: none;
        flex-direction: column;
        gap: 16px;
        padding: 24px;
        background: var(--off-white);
    }
    
    .banner-buttons-overlay .btn {
        width: 100%;
        max-width: 100%;
        padding: 18px 40px;
        font-size: 1.1rem;
    }
    
    /* Make register button visible on mobile */
    .banner-buttons-overlay .btn-secondary {
        background: var(--primary-color);
        color: var(--white);
        border: 2px solid var(--primary-color);
    }
    
    .banner-buttons-overlay .btn-secondary:hover {
        background: var(--primary-dark);
        border-color: var(--primary-dark);
    }
}

/* Track Card Professional Colors - VISIBLE */
.tracks-grid .track-card:nth-child(1) {
    border-top: 6px solid #0284c7 !important;
    background: linear-gradient(135deg, rgba(2, 132, 199, 0.1) 0%, rgba(255, 255, 255, 1) 100%) !important;
}

.tracks-grid .track-card:nth-child(2) {
    border-top: 6px solid #7c3aed !important;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1) 0%, rgba(255, 255, 255, 1) 100%) !important;
}

.tracks-grid .track-card:nth-child(3) {
    border-top: 6px solid #059669 !important;
    background: linear-gradient(135deg, rgba(5, 150, 105, 0.1) 0%, rgba(255, 255, 255, 1) 100%) !important;
}

.tracks-grid .track-card:nth-child(4) {
    border-top: 6px solid #f59e0b !important;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(255, 255, 255, 1) 100%) !important;
}

.tracks-grid .track-card:nth-child(5) {
    border-top: 6px solid #0891b2 !important;
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.1) 0%, rgba(255, 255, 255, 1) 100%) !important;
}

.tracks-grid .track-card:nth-child(6) {
    border-top: 6px solid #dc2626 !important;
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.1) 0%, rgba(255, 255, 255, 1) 100%) !important;
}

/* Timeline - Right Aligned with Small Circle */
.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: 60px 0 60px 180px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 140px;
    top: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--secondary-color), var(--accent-color));
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    gap: 40px;
    margin-bottom: 50px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -52px;
    top: 24px;
    width: 12px;
    height: 12px;
    background: var(--white);
    border: 3px solid var(--secondary-color);
    border-radius: 50%;
    z-index: 2;
}

.timeline-date {
    flex: 0 0 120px;
    text-align: right;
    position: absolute;
    left: -180px;
    top: 0;
}

.timeline-content {
    flex: 1;
    background: var(--white);
    padding: 28px 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    position: relative;
    margin-left: 30px;
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 24px;
    width: 0;
    height: 0;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-right: 10px solid var(--white);
}

.timeline-item.highlight .timeline-content::before {
    border-right-color: #fef3c7;
}

@media (max-width: 968px) {
    .timeline {
        padding-left: 80px;
    }
    .timeline::before {
        left: 50px;
    }
    .timeline-date {
        left: -80px;
    }
    .timeline-item::before {
        left: -22px;
    }
}

@media (max-width: 600px) {
    .timeline {
        padding-left: 40px;
        padding-right: 20px;
    }
    .timeline::before {
        left: 20px;
    }
    .timeline-item::before {
        left: 8px;
    }
    .timeline-date {
        position: relative;
        left: 0;
        text-align: left;
        margin-bottom: 12px;
        flex: 0 0 auto;
    }
    .timeline-item {
        flex-direction: column;
        padding-left: 0;
        margin-left: 30px;
    }
    .timeline-content {
        margin-left: 0;
        padding: 20px;
    }
    .timeline-content::before {
        display: none;
    }
    
    .date-box {
        display: inline-flex;
        flex-direction: column;
        align-items: center;
        padding: 8px 16px;
        background: var(--gradient-1);
        color: white;
        border-radius: 8px;
    }
    
    .date-box .day {
        font-size: 1.5rem;
        font-weight: 700;
        line-height: 1;
    }
    
    .date-box .month {
        font-size: 0.9rem;
        text-transform: uppercase;
        margin-top: 2px;
    }
}

/* Committee Grid - 3x2 Layout */
.committee-grid-three {
    display: grid;
    grid-template-columns: repeat(3, 1fr) !important;
    gap: 36px;
    max-width: 1200px;
    margin: 0 auto;
}

@media (max-width: 968px) {
    .committee-grid-three {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

@media (max-width: 600px) {
    .committee-grid-three {
        grid-template-columns: 1fr !important;
    }
}

/* Countdown Timer Section */
.countdown-section {
    background: linear-gradient(135deg, #0c4a6e 0%, #0284c7 100%);
    padding: 60px 0;
    position: relative;
}

.countdown-container {
    text-align: center;
}

.countdown-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 40px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.countdown-timer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.countdown-item {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    padding: 30px 40px;
    min-width: 140px;
}

.countdown-value {
    display: block;
    font-size: 4rem;
    font-weight: 900;
    color: #f59e0b;
    line-height: 1;
    margin-bottom: 10px;
}

.countdown-label {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff;
    text-transform: uppercase;
}

.countdown-separator {
    font-size: 3rem;
    font-weight: 700;
    color: #ffffff;
}

@media (max-width: 768px) {
    .countdown-title {
        font-size: 2rem;
    }
    .countdown-item {
        padding: 20px 30px;
        min-width: 100px;
    }
    .countdown-value {
        font-size: 3rem;
    }
    .countdown-separator {
        display: none;
    }
}

/* Venue Image Slider Gallery */
.venue-slider-gallery {
    position: relative;
    margin-top: 40px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

.venue-slider-wrapper {
    position: relative;
    width: 100%;
    height: 500px;
    overflow: hidden;
}

.venue-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease-in-out;
}

.venue-slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 1;
}

.venue-slide-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.venue-slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid #0c4a6e;
    border-radius: 50%;
    color: #0c4a6e;
    font-size: 1.2rem;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.venue-slider-arrow:hover {
    background: #f59e0b;
    color: white;
    border-color: #f59e0b;
    transform: translateY(-50%) scale(1.1);
}

.venue-prev {
    left: 20px;
}

.venue-next {
    right: 20px;
}

.venue-slider-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.venue-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: 2px solid rgba(255, 255, 255, 0.8);
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.venue-dot:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: scale(1.2);
}

.venue-dot.active {
    background: #f59e0b;
    border-color: #f59e0b;
    width: 32px;
    border-radius: 6px;
}

@media (max-width: 768px) {
    .venue-slider-wrapper {
        height: 350px;
    }
    
    .venue-slider-arrow {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .venue-prev {
        left: 10px;
    }
    
    .venue-next {
        right: 10px;
    }
}

/* Additional Mobile Improvements */
@media (max-width: 768px) {
    /* Prevent horizontal scroll */
    body {
        overflow-x: hidden;
    }
    
    .container {
        padding: 0 16px;
    }
    
    /* Countdown section mobile */
    .countdown-timer {
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .countdown-item {
        min-width: 70px;
    }
    
    .countdown-value {
        font-size: 2rem;
    }
    
    .countdown-label {
        font-size: 0.75rem;
    }
    
    .countdown-separator {
        display: none;
    }
    
    /* Track cards mobile */
    .track-card {
        padding: 24px;
    }
    
    .track-header h3 {
        font-size: 1.1rem;
    }
    
    .track-topics {
        font-size: 0.9rem;
    }
    
    /* Committee members mobile */
    .committee-member {
        padding: 20px;
    }
    
    .member-photo {
        width: 120px;
        height: 120px;
        margin: 0 auto 16px;
    }
    
    /* Registration tables mobile */
    .reg-table {
        font-size: 0.9rem;
    }
    
    .reg-table th,
    .reg-table td {
        padding: 12px 8px;
    }
    
    /* Venue slider mobile */
    .venue-slider-gallery {
        margin-top: 24px;
    }
    
    .venue-slider-arrow {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
    
    .venue-slider-dots {
        bottom: 12px;
    }
    
    .venue-dot {
        width: 8px;
        height: 8px;
    }
}

/* Extra small devices */
@media (max-width: 480px) {
    .section {
        padding: 40px 0;
    }
    
    .section-title {
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
        margin-bottom: 2rem;
    }
    
    .btn {
        padding: 14px 32px;
        font-size: 1rem;
    }
    
    .btn-lg {
        padding: 16px 40px;
        font-size: 1.1rem;
    }
    
    .nav-container {
        padding: 1rem 16px;
    }
    
    .brand-text {
        font-size: 1.3rem;
    }
    
    .logo-img {
        height: 45px;
    }
}

/* Mobile Navigation Fix - Extra Specificity */
@media (max-width: 768px) {
    .navbar {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        width: 100% !important;
        background: rgba(15, 23, 42, 0.98) !important;
        z-index: 1000 !important;
        display: block !important;
    }
    
    .nav-container {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        padding: 1rem 16px !important;
    }
    
    .nav-brand {
        display: flex !important;
        gap: 10px !important;
    }
    
    .nav-toggle {
        display: flex !important;
        flex-direction: column !important;
        gap: 6px !important;
        cursor: pointer !important;
        padding: 8px !important;
        z-index: 1001 !important;
    }
    
    .nav-toggle span {
        width: 28px !important;
        height: 3px !important;
        background: #ffffff !important;
        border-radius: 3px !important;
        display: block !important;
    }
}

/* Ensure hamburger is always visible */
@media (max-width: 600px) {
    .nav-container {
        padding: 0.8rem 12px !important;
    }
    
    .logo-img {
        height: 40px !important;
    }
    
    .brand-text {
        font-size: 1.1rem !important;
    }
    
    .nav-toggle {
        display: flex !important;
        min-width: 40px !important;
        min-height: 40px !important;
        align-items: center !important;
        justify-content: center !important;
    }
}
