/* ===================================
   ICETADS-2025 Conference Website
   Complete Stylesheet
   =================================== */

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

:root {
    --primary-color: #1e3a8a;
    --secondary-color: #3b82f6;
    --accent-color: #f59e0b;
    --dark-color: #1f2937;
    --light-color: #f3f4f6;
    --white: #ffffff;
    --text-color: #374151;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --gradient-primary: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===================================
   HEADER STYLES
   =================================== */

.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--white);
    box-shadow: var(--shadow-md);
}

.top-bar {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 10px 0;
    font-size: 14px;
}

.top-info {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.top-info span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-info i {
    color: var(--accent-color);
}

.navbar {
    padding: 15px 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    width: 60px;      /* Adjust size as needed */
    height: auto;
    margin-right: 10px;
    border-radius: 10px; /* optional: make corners rounded */
}


.logo-text h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    font-family: 'Montserrat', sans-serif;
}

.logo-text p {
    font-size: 12px;
    color: var(--text-color);
    margin-top: -5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 5px;
}

.nav-menu li a {
    text-decoration: none;
    color: var(--text-color);
    padding: 10px 18px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 15px;
    transition: all 0.3s ease;
    display: block;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    background: var(--gradient-primary);
    color: var(--white);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    background-image: 
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><defs><linearGradient id="grad1" x1="0%" y1="0%" x2="100%" y2="100%"><stop offset="0%" style="stop-color:%231e3a8a;stop-opacity:0.3" /><stop offset="100%" style="stop-color:%233b82f6;stop-opacity:0.3" /></linearGradient></defs><circle cx="100" cy="100" r="80" fill="url(%23grad1)"/><circle cx="900" cy="400" r="120" fill="url(%23grad1)"/><circle cx="1100" cy="150" r="60" fill="url(%23grad1)"/><circle cx="300" cy="500" r="90" fill="url(%23grad1)"/></svg>'),
        linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    padding: 60px 20px;
}

.hero-label {
    font-size: 16px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent-color);
    font-weight: 600;
    animation: fadeInDown 1s ease;
}

.hero-title {
    font-size: 72px;
    font-weight: 800;
    margin: 20px 0;
    font-family: 'Montserrat', sans-serif;
    animation: fadeInUp 1s ease 0.2s both;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 30px;
    font-weight: 400;
    animation: fadeInUp 1s ease 0.4s both;
    line-height: 1.5;
}

.hero-info {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin: 30px 0;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.6s both;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 500;
}

.info-item i {
    font-size: 24px;
    color: var(--accent-color);
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.8s both;
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    font-size: 24px;
    color: var(--white);
}

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

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ===================================
   BUTTONS
   =================================== */

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--white);
}

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

.btn-large {
    padding: 15px 40px;
    font-size: 18px;
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

/* ===================================
   LOGO SLIDER
   =================================== */

.logo-slider {
    padding: 50px 0;
    background: var(--light-color);
    overflow: hidden;
}

.logo-slider h3 {
    text-align: center;
    font-size: 24px;
    margin-bottom: 30px;
    color: var(--primary-color);
}

.slider-track {
    display: flex;
    animation: scroll 30s linear infinite;
    gap: 60px;
}

.slide {
    min-width: 200px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide img {
    max-width: 180px;
    max-height: 60px;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: all 0.3s ease;
}

.slide img:hover {
    filter: grayscale(0%);
    opacity: 1;
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

/* ===================================
   QUICK INFO SECTION
   =================================== */

.quick-info {
    padding: 80px 0;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.info-card {
    background: var(--white);
    padding: 35px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.info-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.icon-box {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 32px;
    color: var(--white);
}

.info-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.info-card p {
    color: var(--text-color);
    margin-bottom: 20px;
    line-height: 1.8;
}

.card-link {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: gap 0.3s ease;
}

.card-link:hover {
    gap: 12px;
}

/* ===================================
   SECTION STYLES
   =================================== */

.about-section,
.publication-section,
.tracks-section,
.sponsors-section,
.dates-section {
    padding: 80px 0;
}

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

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

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-label {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--secondary-color);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 15px;
}

.section-header h2 {
    font-size: 42px;
    color: var(--dark-color);
    font-weight: 700;
    font-family: 'Montserrat', sans-serif;
}

.about-content p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
    color: var(--text-color);
}

.objectives,
.audience {
    margin-top: 40px;
}

.objectives h3,
.audience h3 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.objectives-list {
    list-style: none;
}

.objectives-list li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 15px;
    font-size: 16px;
    line-height: 1.8;
}

.objectives-list i {
    color: var(--success-color);
    font-size: 20px;
    margin-top: 3px;
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.audience-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: var(--light-color);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.audience-item:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateX(5px);
}

.audience-item i {
    font-size: 32px;
    color: var(--secondary-color);
}

.audience-item:hover i {
    color: var(--accent-color);
}

/* ===================================
   PUBLICATION SECTION
   =================================== */

.publication-content {
    max-width: 1000px;
    margin: 0 auto;
}

.publication-intro {
    font-size: 17px;
    line-height: 1.9;
    margin-bottom: 40px;
    text-align: center;
    color: var(--text-color);
}

.publishers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.publisher-card {
    background: var(--white);
    padding: 35px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 2px solid var(--border-color);
}

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

.publisher-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: var(--white);
    margin-bottom: 20px;
}

.publisher-card h3 {
    font-size: 20px;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.publisher-type {
    color: var(--text-color);
    font-size: 14px;
    margin-bottom: 20px;
}

.publisher-features {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.publisher-features span {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-color);
}

.publisher-features i {
    color: var(--success-color);
}

.publication-note {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 20px;
    background: rgba(59, 130, 246, 0.1);
    border-left: 4px solid var(--secondary-color);
    border-radius: 8px;
}

.publication-note i {
    font-size: 24px;
    color: var(--secondary-color);
    margin-top: 3px;
}

/* ===================================
   TRACKS SECTION
   =================================== */

.tracks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.track-card {
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.track-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient-primary);
}

.track-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.track-number {
    font-size: 48px;
    font-weight: 800;
    color: rgba(59, 130, 246, 0.1);
    margin-bottom: 15px;
    font-family: 'Montserrat', sans-serif;
}

.track-card h3 {
    font-size: 22px;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.track-card p {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 20px;
}

.track-link {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: gap 0.3s ease;
}

.track-link:hover {
    gap: 12px;
}

/* ===================================
   SPONSORS SECTION
   =================================== */

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

.sponsors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    max-width: 800px;
    margin: 0 auto;
}

.sponsor-card {
    background: var(--light-color);
    padding: 40px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.sponsor-card:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.sponsor-card img {
    max-width: 200px;
    height: auto;
    margin-bottom: 20px;
}

.sponsor-logo-placeholder {
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: var(--white);
    margin: 0 auto 20px;
}

.sponsor-card h4 {
    font-size: 20px;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.sponsor-card p {
    color: var(--text-color);
    font-size: 14px;
    margin-bottom: 15px;
}

.sponsor-link {
    display: inline-block;
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
}

/* ===================================
   TIMELINE
   =================================== */

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background: var(--border-color);
}

.timeline-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
    position: relative;
}

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

.timeline-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--white);
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 2;
}

.timeline-content {
    width: calc(50% - 50px);
    background: var(--white);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.timeline-content h3 {
    font-size: 20px;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.timeline-content .date {
    font-size: 18px;
    font-weight: 600;
    color: var(--secondary-color);
}

/* ===================================
   CTA SECTION
   =================================== */

.cta-section {
    padding: 80px 0;
    background: var(--gradient-primary);
    color: var(--white);
    text-align: center;
}

.cta-content h2 {
    font-size: 42px;
    margin-bottom: 20px;
    font-family: 'Montserrat', sans-serif;
}

.cta-content p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3,
.footer-col h4 {
    margin-bottom: 20px;
    color: var(--white);
}

.footer-col p {
    opacity: 0.8;
    line-height: 1.8;
    font-size: 14px;
}

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

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.footer-col ul li a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.contact-info li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.contact-info i {
    color: var(--accent-color);
    margin-top: 3px;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--accent-color);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
    font-size: 14px;
    opacity: 0.8;
}

.footer-bottom a {
    color: var(--accent-color);
    text-decoration: none;
}

/* ===================================
   PAGE HEADER
   =================================== */

.page-header {
    padding: 80px 0;
    background: var(--gradient-primary);
    color: var(--white);
    text-align: center;
}

.page-header h1 {
    font-size: 48px;
    margin-bottom: 15px;
    font-family: 'Montserrat', sans-serif;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

/* ===================================
   PAGE CONTENT
   =================================== */

.page-content {
    padding: 80px 0;
}

.content-box {
    margin-bottom: 40px;
}

.content-box h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-family: 'Montserrat', sans-serif;
}

.content-box h3 {
    font-size: 24px;
    color: var(--dark-color);
    margin-bottom: 15px;
    margin-top: 30px;
}

.content-box p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 15px;
}

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

.styled-list li {
    padding-left: 30px;
    position: relative;
    margin-bottom: 12px;
    line-height: 1.8;
}

.styled-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

.highlight-box {
    background: var(--light-color);
    padding: 30px;
    border-radius: 12px;
    border-left: 4px solid var(--secondary-color);
}

/* ===================================
   COMMITTEE STYLES
   =================================== */

.committee-section {
    margin-bottom: 50px;
}

.committee-section h3 {
    font-size: 26px;
    color: var(--primary-color);
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.committee-subsection {
    margin-bottom: 30px;
}

.committee-subsection h4 {
    font-size: 18px;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.committee-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.member-card {
    background: var(--white);
    padding: 25px;
    border-radius: 10px;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.member-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.member-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--white);
    margin: 0 auto 15px;
}

.member-card h4 {
    font-size: 18px;
    color: var(--dark-color);
    margin-bottom: 8px;
}

.position {
    color: var(--secondary-color);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 5px;
}

.affiliation {
    color: var(--text-color);
    font-size: 13px;
    line-height: 1.6;
}

/* ===================================
   CALL FOR PAPERS STYLES
   =================================== */

.track-detail {
    margin-bottom: 40px;
    padding: 30px;
    background: var(--light-color);
    border-radius: 12px;
}

.track-detail h3 {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.topics-list {
    list-style: none;
    padding-left: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 12px;
}

.topics-list li {
    padding-left: 25px;
    position: relative;
    line-height: 1.8;
    color: var(--text-color);
}

.topics-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* ===================================
   IMPORTANT DATES PAGE
   =================================== */

.dates-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.note-box {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 20px;
    background: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--accent-color);
    border-radius: 8px;
    margin-top: 20px;
}

.note-box i {
    font-size: 24px;
    color: var(--accent-color);
    margin-top: 3px;
}

.timeline-full {
    max-width: 900px;
    margin: 0 auto;
}

.timeline-item-full {
    display: flex;
    gap: 30px;
    margin-bottom: 50px;
}

.timeline-date {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.date-circle {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.date-line {
    width: 3px;
    flex-grow: 1;
    background: var(--border-color);
    margin: 10px 0;
}

.timeline-item-full:last-child .date-line {
    display: none;
}

.timeline-details {
    flex-grow: 1;
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.timeline-details h3 {
    font-size: 22px;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.date-main {
    font-size: 20px;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.date-extended {
    font-size: 18px;
    color: var(--success-color);
    margin-bottom: 15px;
}

.description {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 15px;
}

.date-btn {
    display: inline-block;
    padding: 10px 25px;
    background: var(--secondary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.date-btn:hover {
    background: var(--primary-color);
    transform: translateX(5px);
}

.important-notes {
    max-width: 800px;
    margin: 50px auto;
    padding: 30px;
    background: var(--light-color);
    border-radius: 12px;
}

.important-notes h3 {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

/* ===================================
   PAPER SUBMISSION PAGE
   =================================== */

.submission-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
}

.sidebar-card {
    background: var(--white);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    margin-bottom: 25px;
}

.sidebar-card h3 {
    font-size: 20px;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.qr-code {
    text-align: center;
    padding: 20px;
    background: var(--light-color);
    border-radius: 8px;
    margin: 20px 0;
}

.qr-code img {
    max-width: 200px;
}

.qr-note {
    font-size: 14px;
    color: var(--text-color);
    margin: 10px 0;
}

.dates-list {
    list-style: none;
}

.dates-list li {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.dates-list i {
    font-size: 24px;
    color: var(--secondary-color);
}

.dates-list strong {
    display: block;
    color: var(--dark-color);
    margin-bottom: 3px;
}

.dates-list p {
    color: var(--text-color);
    font-size: 14px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    background: var(--light-color);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-color);
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

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

.download-btn i {
    font-size: 20px;
}

.alert-box {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 20px;
    background: rgba(239, 68, 68, 0.1);
    border-left: 4px solid #ef4444;
    border-radius: 8px;
}

.alert-box i {
    font-size: 24px;
    color: #ef4444;
    margin-top: 3px;
}

.fees-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.fees-table thead {
    background: var(--primary-color);
    color: var(--white);
}

.fees-table th,
.fees-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.fees-table tbody tr:hover {
    background: var(--light-color);
}

.fee-note {
    font-size: 14px;
    color: var(--text-color);
    font-style: italic;
    margin-top: 10px;
}

/* ===================================
   REGISTRATION PAGE
   =================================== */

/* ===================================
   ENHANCED REGISTRATION PAGE STYLES
   =================================== */

.alert-box-info {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 25px 30px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(30, 58, 138, 0.1) 100%);
    border-left: 5px solid var(--secondary-color);
    border-radius: 12px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-sm);
}

.alert-box-info i {
    font-size: 32px;
    color: var(--secondary-color);
    margin-top: 5px;
}

.alert-box-info h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.alert-box-info p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-color);
}

.eligibility-box {
    margin-top: 25px;
    padding: 20px 25px;
    background: rgba(16, 185, 129, 0.1);
    border-left: 4px solid var(--success-color);
    border-radius: 8px;
}

.eligibility-box h4 {
    font-size: 17px;
    color: var(--success-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.eligibility-box p {
    font-size: 15px;
    color: var(--text-color);
    line-height: 1.7;
}

.process-intro {
    font-size: 16px;
    color: var(--text-color);
    margin-bottom: 30px;
    text-align: center;
}

.registration-process {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-top: 30px;
}

.reg-step-box {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.reg-step-box:hover {
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-lg);
    transform: translateX(5px);
}

.reg-step-header {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 20px 30px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.reg-step-number {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    min-width: 80px;
}

.reg-step-number i {
    font-size: 32px;
}

.reg-step-number span {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    background: rgba(255, 255, 255, 0.2);
    padding: 4px 12px;
    border-radius: 12px;
}

.reg-step-header h3 {
    font-size: 20px;
    margin: 0;
    color: var(--white);
}

.reg-step-content {
    padding: 30px;
}

.reg-step-content p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 20px;
}

.reg-checklist {
    list-style: none;
    padding: 0;
    margin: 20px 0;
}

.reg-checklist li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 0;
    font-size: 15px;
    color: var(--text-color);
    line-height: 1.6;
}

.reg-checklist i {
    color: var(--success-color);
    font-size: 16px;
    margin-top: 3px;
}

.reg-note {
    margin-top: 20px;
    padding: 15px 20px;
    background: rgba(245, 158, 11, 0.1);
    border-left: 3px solid var(--accent-color);
    border-radius: 6px;
    font-size: 14px;
    color: var(--text-color);
}

.reg-note strong {
    color: var(--accent-color);
}

.reg-action {
    margin-top: 25px;
    padding: 20px;
    background: var(--light-color);
    border-radius: 8px;
}

.reg-action > strong {
    display: block;
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.reg-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.method-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    background: var(--white);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.method-option i {
    font-size: 24px;
    color: var(--secondary-color);
}

.method-option span {
    font-size: 14px;
    line-height: 1.5;
}

.reg-important {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-top: 20px;
    padding: 20px;
    background: rgba(239, 68, 68, 0.05);
    border-left: 3px solid #ef4444;
    border-radius: 6px;
}

.reg-important i {
    font-size: 24px;
    color: #ef4444;
    margin-top: 2px;
}

.reg-important p {
    margin: 0;
    font-size: 14px;
    line-height: 1.7;
}

.reg-success {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-top: 20px;
    padding: 20px;
    background: rgba(16, 185, 129, 0.1);
    border-left: 3px solid var(--success-color);
    border-radius: 6px;
}

.reg-success i {
    font-size: 24px;
    color: var(--success-color);
    margin-top: 2px;
}

.reg-success p {
    margin: 0;
    font-size: 15px;
    line-height: 1.7;
}

.contact-details-box {
    padding: 25px;
    background: var(--white);
    border-radius: 8px;
}

.contact-details-box > p {
    margin-bottom: 25px;
    font-size: 15px;
}

.contact-item-large {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px;
    background: var(--light-color);
    border-radius: 8px;
    margin-bottom: 15px;
}

.contact-item-large:last-child {
    margin-bottom: 0;
}

.contact-item-large i {
    font-size: 28px;
    color: var(--secondary-color);
    margin-top: 5px;
}

.contact-item-large strong {
    display: block;
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.contact-item-large p {
    font-size: 15px;
    color: var(--text-color);
    margin: 3px 0;
}

.timing-info {
    font-size: 13px !important;
    color: var(--secondary-color) !important;
    font-style: italic;
}

/* Responsive Design for Registration Page */
@media (max-width: 768px) {
    .reg-step-header {
        flex-direction: column;
        text-align: center;
    }
    
    .reg-step-number {
        min-width: auto;
    }
    
    .reg-methods {
        grid-template-columns: 1fr;
    }
    
    .alert-box-info {
        flex-direction: column;
    }
    
    .alert-box-info i {
        font-size: 28px;
    }
}

/* Contact Page Enhancements */
.help-list {
    list-style: none;
    padding: 0;
    margin-top: 15px;
}

/* Contact Page Enhancements */
.help-list {
    list-style: none;
    padding: 0;
    margin-top: 15px;
}

.help-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-color);
}

.help-list i {
    color: var(--success-color);
    font-size: 14px;
}

.contact-card a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

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

.cta-buttons .btn i {
    margin-right: 8px;
}

/* ===================================
   CTA BOX
   =================================== */

.cta-box {
    text-align: center;
    padding: 50px;
    background: var(--gradient-primary);
    border-radius: 12px;
    color: var(--white);
    margin-top: 50px;
}

.cta-box h3 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--white) !important;
}

.cta-box p {
    font-size: 16px;
    margin-bottom: 25px;
    opacity: 0.9;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 1024px) {
    .submission-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: row !important;
        padding-left: 80px;
    }
    
    .timeline-content {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 42px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 137px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 20px 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li a {
        margin: 5px 20px;
    }
    
    .hamburger {
        display: flex;
    }
    
    .section-header h2 {
        font-size: 32px;
    }
    
    .page-header h1 {
        font-size: 36px;
    }
    
    .info-grid,
    .tracks-grid,
    .publishers-grid,
    .sponsors-grid {
        grid-template-columns: 1fr;
    }
    
    .audience-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline-item-full {
        flex-direction: column;
    }
    
    .date-line {
        height: 50px;
        width: 3px;
    }
}

@media (max-width: 480px) {
    .top-info {
        flex-direction: column;
        gap: 10px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-info {
        flex-direction: column;
        gap: 15px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .cta-buttons .btn {
        width: 100%;
    }
}

/* ===================================
   UTILITY CLASSES
   =================================== */

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

.mt-20 {
    margin-top: 20px;
}

.mt-40 {
    margin-top: 40px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mb-40 {
    margin-bottom: 40px;
}

/* ===================================
   AUDIENCE BOX (About Page)
   =================================== */

.audience-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.audience-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 30px;
    background: var(--light-color);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.audience-box:hover {
    background: var(--white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.audience-box i {
    font-size: 48px;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.audience-box h3 {
    font-size: 16px;
    color: var(--dark-color);
    margin: 0;
}

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

/* Print Styles */
@media print {
    .header,
    .footer,
    .hero-scroll,
    .btn {
        display: none;
    }
}