:root {
    --primary-color: #14418b;
    --secondary-color: #3364b7;
    --accent-color: #f5a700;
    --light-accent: #f8c846;
    --text-color: #333;
    --light-text: #666;
    --background-light: #f7f9fc;
    --background-white: #ffffff;
    --border-color: #e5e8ed;
    --section-padding: 60px 0;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --radius: 6px;
}

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

.top-banner {
    background-color: var(--accent-color);
    color: #fff;
    text-align: center;
    padding: 8px 15px;
    font-size: 14px;
    font-weight: 500;
}

.top-banner a {
    color: #fff;
    text-decoration: underline;
    font-weight: 700;
}

.top-banner a:hover {
    color: var(--background-light);
}

body {
    font-family: 'Roboto', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-light);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header Styles */
header {
    position: relative;
    width: 100%;
    height: 250px;  /* Reduced from 350px to 250px to make it thinner */
    overflow: hidden;
}

.banner {
    position: relative;
    width: 100%;
    height: 100%;
    background: url('1.jpg') no-repeat center center;
    background-size: cover;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 17, 53, 0.75);  /* Made slightly more transparent */
}

.header-content {
    position: relative;
    z-index: 2;
    color: white;
    text-align: center;
    padding: 50px 20px;  /* Reduced from 80px to 50px to match the smaller header */
}

.header-content h1 {
    font-family: 'Lora', serif;
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: 1px;
}

.header-content h3 {
    font-family: 'Roboto', sans-serif;
    font-size: 1.5rem;
    font-weight: 400;
    margin-top: 10px;
    color: var(--light-accent);
}

.conference-logo {
    margin-top: 20px;
}

.logo-image {
    height: 60px;
}

/* Navigation Styles */
nav {
    background-color: var(--primary-color);
    padding: 0;
    z-index: 1000;
}

.sticky {
    position: sticky;
    top: 0;
}

.is-sticky {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

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

nav ul {
    display: flex;
    list-style: none;
    justify-content: center;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}

nav ul li {
    margin: 0;
}

nav ul li a {
    display: block;
    color: white;
    text-decoration: none;
    font-size: 16px;
    padding: 15px 20px;
    transition: background 0.3s;
    font-weight: 500;
}

nav ul li a:hover {
    background-color: var(--secondary-color);
}

/* Hero Section */
.hero-section {
    padding: 60px 0;
    background-color: var(--background-white);
    border-bottom: 1px solid var(--border-color);
}

.hero-content {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

.hero-text {
    flex: 1;
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.hero-text h2 {
    font-family: 'Lora', serif;
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.tagline {
    font-size: 1.2rem;
    color: var(--light-text);
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    text-align: center;
}

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

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

.secondary-btn {
    background-color: white;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

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

/* Content Sections */
main {
    padding: 40px 0;
}

.content-section {
    margin-bottom: 60px;
}

.section-header {
    margin-bottom: 25px;
    position: relative;
}

.section-header h2 {
    font-family: 'Lora', serif;
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.section-header h2 i {
    margin-right: 10px;
    color: var(--accent-color);
}

.section-underline {
    width: 70px;
    height: 3px;
    background-color: var(--accent-color);
    margin-top: 5px;
}

.content-box {
    background-color: var(--background-white);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
}

/* Challenge Tracks */
.challenge-tracks {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin: 25px 0;
}

.track {
    flex: 1;
    min-width: 250px;
    display: flex;
    align-items: center;
    background: var(--background-light);
    padding: 20px;
    border-radius: var(--radius);
    border-left: 4px solid var(--accent-color);
}

.track-icon {
    font-size: 24px;
    color: var(--primary-color);
    margin-right: 15px;
}

.track-title {
    font-weight: 500;
}

/* Task Cards */
.task-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin: 25px 0;
}

.task-card {
    flex: 1;
    min-width: 280px;
    background: var(--background-light);
    padding: 25px;
    border-radius: var(--radius);
    position: relative;
    transition: var(--transition);
    border-top: 4px solid var(--primary-color);
}

.task-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.task-number {
    position: absolute;
    top: -15px;
    right: 20px;
    background: var(--accent-color);
    color: white;
    font-weight: 700;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.task-card h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
    font-family: 'Lora', serif;
}

/* Dataset Section */
.dataset-info {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
}

.dataset-item {
    flex: 1;
    min-width: 280px;
    padding: 20px;
    background-color: var(--background-light);
    border-radius: var(--radius);
}

.dataset-item h4 {
    display: flex;
    align-items: center;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.dataset-item h4 i {
    margin-right: 10px;
    color: var(--accent-color);
}

/* Table Styles */
.table-container {
    overflow-x: auto;
    margin-top: 20px;
}

.dataset-table {
    width: 100%;
    border-collapse: collapse;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.dataset-table th, .dataset-table td {
    padding: 12px 15px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.dataset-table th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 500;
}

.dataset-table tr:nth-child(even) {
    background-color: var(--background-light);
}

.dataset-table tr:hover {
    background-color: #f0f4fa;
}

/* Code Block */
.code-block {
    background-color: #2d2d2d;
    padding: 20px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 25px 0;
}

.code-block pre {
    font-family: 'Courier New', Courier, monospace;
    color: #f8f8f8;
    font-size: 14px;
    line-height: 1.4;
}

/* Note Box */
.note-box {
    display: flex;
    align-items: flex-start;
    background-color: #f8f5e6;
    padding: 15px;
    border-left: 4px solid var(--accent-color);
    border-radius: 0 var(--radius) var(--radius) 0;
    margin: 20px 0;
}

.note-box i {
    color: var(--accent-color);
    font-size: 20px;
    margin-right: 15px;
    margin-top: 3px;
}

.note-box p {
    margin: 0;
}

/* Evaluation Metrics */
.evaluation-metrics {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin: 25px 0;
}

.metric {
    display: flex;
    align-items: flex-start;
    background-color: var(--background-light);
    padding: 20px;
    border-radius: var(--radius);
}

.metric-number {
    background-color: var(--primary-color);
    color: white;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    border-radius: 50%;
    margin-right: 20px;
    flex-shrink: 0;
}

.metric-content h4 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

/* Awards Box */
.awards-box {
    display: flex;
    align-items: center;
    background-color: #f3f7fe;
    padding: 20px;
    border-radius: var(--radius);
    margin: 20px 0;
}

.award-icon {
    font-size: 36px;
    color: var(--accent-color);
    margin-right: 20px;
}

/* Timeline */
.timeline {
    position: relative;
    margin: 30px 0;
}

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

.timeline-date {
    width: 160px;
    padding: 8px 10px;
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    border-radius: var(--radius);
    font-weight: 500;
    flex-shrink: 0;
    margin-right: 20px;
}

.timeline-content {
    background-color: var(--background-light);
    padding: 12px 20px;
    border-radius: var(--radius);
    flex-grow: 1;
}

.timeline-content h4 {
    margin: 0;
    color: var(--text-color);
}

/* Submission Button */
.submission-button {
    text-align: center;
    margin: 30px 0;
}

/* Footer Styles */
footer {
    background-color: #1a1a2e;
    color: #f0f0f0;
    padding: 40px 0 20px;
    margin-top: 50px;
    border-top: 4px solid #4a69bd;
}

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

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 20px;
}

.footer-section {
    flex: 1;
    min-width: 200px;
    margin-bottom: 20px;
    padding: 0 15px;
}

.footer-section h4 {
    color: #60a3bc;
    margin-bottom: 15px;
    font-size: 18px;
    position: relative;
    padding-bottom: 8px;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background-color: #4a69bd;
}

.footer-section p {
    margin-bottom: 10px;
    line-height: 1.6;
}

.footer-section i {
    margin-right: 10px;
    color: #60a3bc;
}

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

.footer-section.links li {
    margin-bottom: 8px;
}

.footer-section.links a {
    color: #f0f0f0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section.links a:hover {
    color: #60a3bc;
    text-decoration: underline;
}

.footer-section.social .social-icons {
    display: flex;
    gap: 15px;
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #2d3748;
    color: #f0f0f0;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background-color: #4a69bd;
    transform: translateY(-3px);
}

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

/* Responsive adjustments */
@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
    }
    
    .footer-section {
        margin-bottom: 30px;
    }
}

/* Paper Submission Section Styles */
.paper-submission-guidelines {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.paper-section {
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.paper-section:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.paper-section h4 {
    color: #2c3e50;
    margin-top: 0;
    margin-bottom: 12px;
    font-size: 1.1em;
    border-bottom: 2px solid #eaeaea;
    padding-bottom: 8px;
}

/* Ensure this works well with the rest of your styling */

/* Submission Flow Styles */
.submission-flow {
    display: flex;
    gap: 30px;
    margin: 25px 0;
}

.submission-step {
    flex: 1;
    background-color: var(--background-light);
    border-radius: var(--radius);
    padding: 25px;
    transition: var(--transition);
    border-top: 4px solid var(--primary-color);
}

.submission-step:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.step-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.step-number {
    background-color: var(--primary-color);
    color: white;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    border-radius: 50%;
    margin-right: 15px;
    flex-shrink: 0;
    font-size: 18px;
}

.step-header h4 {
    margin: 0;
    color: var(--primary-color);
    font-family: 'Lora', serif;
    font-size: 1.3rem;
}

.step-content {
    line-height: 1.6;
}

.step-content p {
    margin-bottom: 15px;
}

.submission-steps-list {
    margin-top: 20px;
}

.step-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 12px;
    padding: 8px 0;
}

.step-label {
    font-weight: 600;
    color: var(--primary-color);
    margin-right: 8px;
    flex-shrink: 0;
    min-width: 60px;
}

.step-item span:last-child {
    flex: 1;
}

/* Responsive Design for Submission Flow */
@media (max-width: 768px) {
    .submission-flow {
        flex-direction: column;
        gap: 20px;
    }
    
    .submission-step {
        padding: 20px;
    }
    
    .step-header h4 {
        font-size: 1.1rem;
    }
    
    .step-number {
        width: 35px;
        height: 35px;
        font-size: 16px;
    }
}