:root {
    --primary: #2c3e50;
    --secondary: #3498db;
    --accent: #e74c3c;
    --light: #ecf0f1;
    --dark: #2c3e50;
    --success: #2ecc71;
    --warning: #f39c12;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 2rem 0;
    text-align: center;
    position: relative;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo {
    max-width: 350px;
    height: auto;
    margin: 0 auto 1.5rem;
    display: block;
}

/* Early Bird Notice for the header */
/* Sized to match .btn so it sits visually balanced next to the Book button */
.early-bird {
    background-color: #c4570a; /* deep orange — more saturated than amber */
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    margin: 1rem auto;
    font-weight: 600;
    display: inline-block;
}

/* Early Bird Notice for the course section*/
.early-bird-notice-box {
    background-color: #ff9900; /* Orange color */
    color: white;
    text-align: center;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
    font-weight: bold;
}

/* Reference list — academic hanging-indent style for course bibliographies */
.references-heading {
    margin: 1.25rem 0 0.4rem;
    font-weight: 700;
    color: var(--primary);
}
.references {
    list-style: none;
    padding-left: 0;
    margin: 0;
}
.references li {
    padding-left: 2rem;
    text-indent: -2rem;
    margin-bottom: 0.6rem;
    font-size: 0.93rem;
    color: #3a3a3a;
    line-height: 1.5;
}
.references li:last-child {
    margin-bottom: 0;
}
.references li a {
    color: var(--secondary);
    text-decoration: none;
    border-bottom: 1px dotted var(--secondary);
    transition: all 0.2s;
}
.references li a:hover {
    color: var(--primary);
    border-bottom-style: solid;
}

/* Sticky "Book a place" CTA — fades in after the hero scrolls out of view */
.sticky-book {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 99;
    background-color: var(--accent);
    color: white;
    padding: 0.85rem 1.4rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s ease-out, transform 0.3s ease-out, background-color 0.2s;
    pointer-events: none;
}
.sticky-book.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.sticky-book:hover {
    background-color: #c0392b;
}
.sticky-book i {
    margin-right: 0.4rem;
}
@media (max-width: 600px) {
    .sticky-book {
        bottom: 1rem;
        right: 1rem;
        padding: 0.7rem 1.1rem;
        font-size: 0.95rem;
    }
}

nav {
    background-color: var(--dark);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

nav ul li {
    padding: 1rem 1.5rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    position: relative;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: width 0.3s;
}

nav ul li a:hover::after {
    width: 100%;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

section {
    padding: 3rem 0;
}

section:nth-child(even) {
    background-color: white;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

h2 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 2rem;
    text-align: center;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--secondary);
}

h3 {
    font-size: 1.5rem;
    color: var(--secondary);
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1.5rem;
}

.btn {
    display: inline-block;
    background-color: var(--secondary);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

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

.countdown {
    display: flex;
    justify-content: center;
    margin: 2rem 0;
}

.countdown-item {
    margin: 0 1rem;
    text-align: center;
    min-width: 80px;
}

.countdown-number {
    background-color: var(--dark);
    color: white;
    font-size: 2rem;
    padding: 1rem;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    font-weight: bold;
}

.countdown-label {
    margin-top: 0.5rem;
    text-transform: uppercase;
    font-size: 0.8rem;
    font-weight: bold;
    color: var(--primary);
}

/* About NUSC section */
.about-list {
    margin: 1.5rem 0 1.5rem 2rem;
    list-style-type: disc;
}

.about-list li {
    margin-bottom: 0.5rem;
    padding-left: 0.5rem;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.feature {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
}

.feature:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.feature-icon {
    background-color: var(--primary);
    color: white;
    padding: 2rem;
    font-size: 3rem;
    text-align: center;
}

.feature-content {
    padding: 1.5rem;
}

.workshops {
    display: grid;
    grid-template-columns: repeat(2, 1fr); /* Changed to always show 2 columns */
    gap: 2rem;
    margin: 3rem 0;
}

.workshop {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(0, 0, 0, 0.08);
    transition: all 0.3s;
    height: 100%;
    display: flex;
    flex-direction: column;
    border: 1px solid #d8dde1;
    border-top: 4px solid var(--secondary);
}

/* Topic accent stripe — groups cards by subject area for quicker scanning */
.workshop.topic-software { border-top-color: #3498db; }    /* R, Python — secondary blue */
.workshop.topic-network  { border-top-color: #9b59b6; }    /* Networks — purple */
.workshop.topic-ai       { border-top-color: #1abc9c; }    /* Text & AI — teal */
.workshop.topic-methods  { border-top-color: #f39c12; }    /* Methods/SPSS/oTree — orange */

.workshop:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.workshop-image {
    background-size: cover;
    background-position: center;
    height: 200px;
    width: 100%;
    border-radius: 4px;
    margin-bottom: 15px;
}

.workshop-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.workshop-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tag {
    background-color: #f0f0f0; /* Light gray background */
    color: #333;
    padding: 0.4rem 0.8rem;
    border-radius: 50px; /* Pill shape */
    font-size: 0.85rem;
    font-weight: 500;
    display: inline-block;
}

/* Add this for responsive behavior on smaller screens */
@media (max-width: 768px) {
    .workshops {
        grid-template-columns: 1fr; /* Switch to single column on mobile */
    }
}

.tag {
    background-color: var(--light);
    color: var(--dark);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}


/* More Info Link Styling */
.more-info-link {
    display: inline-block;
    margin-top: 12px;
    padding: 8px 16px;
    background-color: #f5f5f5;
    color: #007bff;
    text-decoration: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.more-info-link:hover {
    background-color: #e8f0fe;
    color: #0056b3;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.more-info-link i {
    margin-left: 6px;
    font-size: 12px;
}

.instructors {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.instructor {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.instructor:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.instructor-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    overflow: hidden;
    margin: 2rem auto 1rem;
    border: 5px solid var(--light);
}

.instructor-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.instructor-info {
    padding: 1.5rem;
    flex-grow: 1;
}

.instructor-social {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.instructor-social a {
    color: var(--dark);
    font-size: 1.2rem;
    transition: all 0.3s;
}

.instructor-social a:hover {
    color: var(--secondary);
}

.schedule {
    margin: 2rem 0;
}

.schedule-day {
    margin-bottom: 1.5rem;
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.day-title {
    background-color: var(--secondary);
    padding: 1rem 1.5rem;
    margin-bottom: 0;
    border-radius: 0;
}

/* Progressive day colours give each day a distinct identity at a glance */
.schedule-day:nth-of-type(2) .day-title { background-color: #1abc9c; }
.schedule-day:nth-of-type(3) .day-title { background-color: #9b59b6; }
.schedule-day:nth-of-type(4) .day-title { background-color: #f39c12; }
.schedule-day:nth-of-type(5) .day-title { background-color: var(--accent); }


.day-title h3 {
    color: white;
    margin: 0;
    font-weight: bold;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.schedule-item {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 0.75rem; /* Reduced gap */
    padding: 1rem 1.5rem;
    border-top: 1px solid #eee;
    border-bottom: 1px solid #eee;
}

.schedule-time {
    font-weight: bold;
    color: var(--dark);
    font-size: 0.95rem;
}

.schedule-content h4 {
    margin: 0 0 0.25rem 0;
    color: var(--primary);
    font-size: 1rem;
}

.schedule-content p {
    margin: 0;
    font-size: 0.9rem;
}

.room-info {
    font-weight: 600;
    color: var(--secondary);
    margin: 0.5rem 0 0.25rem 0;
    font-size: 0.95rem;
}

/* For mobile devices */
@media (max-width: 768px) {
    .schedule-item {
        grid-template-columns: 1fr;
        gap: 0.25rem;
        padding: 0.5rem;
    }
    
    .schedule-time {
        margin-bottom: 0.25rem;
    }
}

/* Pricing Table Styles */
.pricing-table-container {
    overflow-x: auto;
    margin: 2rem 0;
}

.courses-pricing-table {
    width: 100%;
    border-collapse: collapse;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    background: white;
    border-radius: 8px;
    overflow: hidden;
}

.courses-pricing-table tbody tr:nth-child(even) {
    background-color: rgba(236, 240, 241, 0.5);
}

.courses-pricing-table th,
.courses-pricing-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.courses-pricing-table th {
    background-color: #007BFF;
    color: white;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.courses-pricing-table tbody tr:hover {
    background-color: rgba(52, 152, 219, 0.1);
}

.courses-pricing-table td:first-child {
    font-weight: 500;
}

.courses-pricing-table td:not(:first-child) {
    text-align: center;
    white-space: nowrap;
}

.courses-pricing-table a {
    display: inline-block;
    padding: 0.4rem 0.9rem;
    color: var(--secondary);
    background-color: rgba(52, 152, 219, 0.1);
    border-radius: 6px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s ease;
}

.courses-pricing-table a:hover {
    color: white;
    background-color: var(--secondary);
}

.pricing-note {
    margin-top: 1rem;
    font-style: italic;
    color: #666;
}

/* Add this to your CSS file */
.early-bird-centered {
    text-align: center;
    font-weight: bold;
    color: #d9534f; /* Red color to make it stand out */
    margin-bottom: 20px;
    font-size: 1.1rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .courses-pricing-table th,
    .courses-pricing-table td {
        padding: 12px 10px;
        font-size: 0.9rem;
    }
}

.booking-action {
    text-align: center;
    margin-top: 2rem;
}

.booking-action p {
    margin-top: 1rem;
}

/* Location section */
.location-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin: 2rem 0;
}

.location-details {
    background-color: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.address {
    display: flex;
    align-items: center;
    margin: 1.5rem 0;
}

.address i {
    font-size: 1.5rem;
    color: var(--secondary);
    margin-right: 1rem;
}

.important-notes {
    background-color: var(--light);
    padding: 1.5rem;
    border-radius: 5px;
    margin: 1.5rem 0;
}

.important-notes h4 {
    color: var(--primary);
    margin-bottom: 1rem;
}

.important-notes ul {
    list-style-position: inside;
}

.important-notes li {
    margin-bottom: 0.5rem;
}

.location-map {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    height: 600px;
}

.location-map iframe {
    width: 100%;
    height: 100%;
    border: 0;
}

.courses-here {
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: 5px;
    margin: 1rem 0;
    border-left: 4px solid var(--secondary);
}

.courses-here h4 {
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.courses-here ul {
    margin: 0;
    padding-left: 1.2rem;
}

.courses-here li {
    margin-bottom: 0.3rem;
}

/* Booking section */
.booking-info {
    background-color: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.booking-cta {
    margin: 2rem 0;
}

.booking-reminder {
    background-color: var(--light);
    padding: 1.5rem;
    border-radius: 5px;
    text-align: left;
}

.booking-reminder p {
    margin-bottom: 0.5rem;
}

.book-now-container {
    text-align: center;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.btn-accent {
    background-color: #e74c3c; /* Same red as the existing button */
    color: white;
    padding: 12px 30px;
    font-size: 1.1rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: background-color 0.3s;
}

.btn-accent:hover {
    background-color: #c0392b; /* Darker shade on hover */
}

.faq {
    margin: 3rem 0;
}

.faq-item {
    margin-bottom: 1rem;
    border: 1px solid #eee;
    border-radius: 5px;
    overflow: hidden;
}

.faq-question {
    padding: 1rem;
    background-color: var(--light);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: 0 1rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s;
}

.faq-item.active .faq-answer {
    padding: 1rem;
    max-height: 500px;
}

.contact-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 1rem;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    margin: 0;
}

.contact-item i {
    font-size: 1.2rem;
    color: var(--secondary);
    margin-right: 0.5rem;
}

.contact-item a {
    color: var(--secondary);
    text-decoration: none;
    transition: all 0.3s;
}

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

.contact-message {
    text-align: center;
    background-color: var(--light);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.contact-text-center {
    text-align: center;
    margin: 0.5rem 0;
    font-size: 0.95rem;
}

/* Add this to reduce overall section padding */
#contact {
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
}

#contact h2 {
    margin-bottom: 1rem; /* Ensure heading has less margin */
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .contact-info {
        flex-direction: column;
        gap: 0.5rem;
    }
}


/* Footer styling with proper spacing */
footer {
    background-color: var(--dark);
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: left;
}

.footer-section {
    padding: 1rem;
    margin-bottom: 1rem;
}

.footer-section h3 {
    color: white;
    margin-bottom: 2rem;
    position: relative;
    font-size: 1.4rem;
    text-align: left;
    padding-bottom: 1rem;
    font-weight: 600;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--secondary);
}

.footer-section ul {
    list-style: none;
    padding-left: 0;
    margin-top: 1rem;
}

.footer-section ul li {
    margin-bottom: 0.8rem;
}

/* Updated footer link styles to match header hover effect */
.footer-section ul li a {
    color: #bbb;
    text-decoration: none;
    transition: all 0.3s;
    position: relative; /* Added for the underline effect */
    font-weight: 600; /* Added to match header links */
}

/* Add the underline effect on hover, just like the header links */
.footer-section ul li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent); /* Same accent color as header links */
    transition: width 0.3s;
}

.footer-section ul li a:hover::after {
    width: 100%; /* Expand the underline on hover */
}

/* Modified hover state */
.footer-section ul li a:hover {
    color: white;
    /* Removed the padding-left: 5px; to prevent shifting */
}

.footer-section p {
    margin-bottom: 0.8rem;
}

.social-links {
    display: flex;
    justify-content: flex-start;
    gap: 2rem;
    margin: 2rem 0;
}

.social-links a {
    color: white;
    font-size: 1.8rem;
    transition: all 0.3s;
}

.social-links a:hover {
    color: var(--secondary);
    transform: translateY(-3px);
}
.footer-bottom {
    margin-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
}

.footer-bottom a {
    color: var(--secondary); /* Use your secondary blue color */
    text-decoration: none;
    transition: all 0.3s;
    position: relative;
}

.footer-bottom a:hover {
    color: white;
}

/* Add the underline effect on hover */
.footer-bottom a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: white;
    transition: width 0.3s;
}

.footer-bottom a:hover::after {
    width: 100%;
}

/* Responsive adjustments */
@media (max-width: 992px) {
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .footer-section {
        text-align: center;
        padding: 0;
        margin-bottom: 0;
    }
    
    .footer-section h3 {
        text-align: center;
    }
    
    .footer-section h3::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .social-links {
        justify-content: center;
    }
    
    .social-links a:hover {
        color: var(--secondary);
        transform: translateY(-3px);
    }
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

/* Mobile navigation */
.menu-toggle {
    display: none;
    cursor: pointer;
    color: white;
    font-size: 1.5rem;
    padding: 1rem;
    color: #333; /* or another darker color */
    background-color: var(--light);
}

/* Responsive */
@media (max-width: 992px) {
    .location-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
        position: absolute;
        right: 1rem;
        top: 1rem;
    }
    
    nav ul {
        flex-direction: column;
        padding: 0;
        display: none;
    }
    
    nav.active ul {
        display: flex;
    }
    
    nav ul li {
        padding: 0.8rem 1rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .schedule-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .countdown-item {
        margin: 0 0.5rem;
        min-width: 60px;
    }
    
    .countdown-number {
        font-size: 1.5rem;
        padding: 0.8rem;
    }
    
    .pricing-option {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .countdown {
        flex-wrap: wrap;
    }
    
    .countdown-item {
        margin: 0.5rem;
    }
}