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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

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

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    color: #4F46E5;
    font-weight: 700;
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #4F46E5;
}

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

.bar {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.8;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background-color: #4F46E5;
    color: white;
}

.btn-primary:hover {
    background-color: #3730A3;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: white;
    color: #4F46E5;
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.hero-graphic {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.hero-graphic i {
    font-size: 6rem;
    opacity: 0.8;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1F2937;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.2rem;
    color: #6B7280;
}

/* Next Session Section */
.next-session {
    padding: 80px 0;
    background-color: #F9FAFB;
}

.session-card {
    background: white;
    border-radius: 16px;
    padding: 3rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid #E5E7EB;
}

.session-header {
    text-align: center;
    margin-bottom: 2rem;
}

.session-header h3 {
    font-size: 2rem;
    font-weight: 700;
    color: #1F2937;
    margin-bottom: 1rem;
}

.session-date, .session-time {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: 0.5rem 0;
    color: #6B7280;
    font-weight: 500;
}

.session-description {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: #F3F4F6;
    border-radius: 12px;
    border-left: 4px solid #4F46E5;
}

.session-description p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: #374151;
}

.sessions-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.session-detail {
    background-color: #F9FAFB;
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid #E5E7EB;
}

.session-detail h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1F2937;
    margin-bottom: 1rem;
}

.session-presenter {
    color: #4F46E5;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.session-duration {
    color: #6B7280;
    font-weight: 500;
    margin-bottom: 1rem;
}

.session-topics h5 {
    font-weight: 600;
    color: #374151;
    margin-bottom: 0.5rem;
}

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

.session-topics li {
    padding: 0.25rem 0;
    color: #6B7280;
    position: relative;
    padding-left: 1.5rem;
}

.session-topics li::before {
    content: "•";
    color: #4F46E5;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.session-info {
    margin-bottom: 2rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background-color: #F3F4F6;
    border-radius: 8px;
    font-weight: 500;
    color: #374151;
}

.info-item i {
    color: #4F46E5;
}

.session-note {
    background-color: #FEF3C7;
    border: 1px solid #F59E0B;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 2rem;
}

.session-note p {
    color: #92400E;
    font-weight: 500;
}

.session-contact {
    text-align: center;
    margin-bottom: 2rem;
}

.session-contact p {
    margin-bottom: 1rem;
    color: #6B7280;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-links a {
    color: #4F46E5;
    text-decoration: none;
    font-weight: 500;
}

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

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

/* Founders Section */
.founders {
    padding: 80px 0;
    background-color: white;
}

.founders-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.founder-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid #E5E7EB;
    text-align: center;
    transition: transform 0.3s ease;
}

.founder-card:hover {
    transform: translateY(-5px);
}

.founder-image {
    margin-bottom: 1.5rem;
}

.founder-image img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #4F46E5;
}

.founder-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1F2937;
    margin-bottom: 0.5rem;
}

.founder-title {
    color: #4F46E5;
    font-weight: 600;
    margin-bottom: 1rem;
}

.founder-bio {
    color: #6B7280;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.linkedin-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #0077B5;
    text-decoration: none;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border: 2px solid #0077B5;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.linkedin-link:hover {
    background-color: #0077B5;
    color: white;
}

/* Previous Events Section */
.previous-events {
    padding: 80px 0;
    background-color: #F9FAFB;
}

.events-container {
    position: relative;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
}

.events-viewport {
    overflow: hidden;
    width: 100%;
}

.events-carousel {
    display: flex;
    gap: 2rem;
    transition: transform 0.3s ease-in-out;
    width: max-content;
    padding: 2rem 0;
}

.event-tile {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid #E5E7EB;
    transition: transform 0.3s ease;
    min-width: 350px;
    max-width: 400px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    text-align: center;
    cursor: pointer;
}

.event-tile:hover {
    transform: translateY(-5px);
}

.event-tile.clickable {
    cursor: pointer;
}

.event-tile.clickable:hover {
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.event-date {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    color: white;
    border-radius: 12px;
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
    gap: 0.5rem;
    font-weight: 600;
}

.event-date i {
    font-size: 1rem;
    opacity: 0.9;
}

.event-date span {
    font-size: 0.95rem;
    line-height: 1.2;
}

.event-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.event-content h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #1F2937;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.event-sessions {
    color: #6B7280;
    margin-bottom: 1rem;
    font-size: 0.95rem;
    line-height: 1.4;
}

.event-description {
    color: #6B7280;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    line-height: 1.5;
    flex: 1;
}

.event-speakers {
    color: #4F46E5;
    font-weight: 600;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.event-action {
    margin-top: auto;
    text-align: center;
}

.btn-more-info {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.btn-more-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

/* Download links are now only used in the modal */
.download-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: #4F46E5;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border: 1px solid #4F46E5;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-size: 0.85rem;
}

.download-link:hover {
    background-color: #4F46E5;
    color: white;
    transform: translateY(-2px);
}

.no-downloads {
    color: #6B7280;
    font-style: italic;
    text-align: center;
    padding: 1rem;
    background-color: #F9FAFB;
    border-radius: 6px;
    border: 1px dashed #D1D5DB;
}

/* Navigation arrows */
.events-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: white;
    border: 2px solid #E5E7EB;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.events-nav:hover {
    background-color: #4F46E5;
    color: white;
    border-color: #4F46E5;
    transform: translateY(-50%) scale(1.1);
}

.events-nav.prev {
    left: -30px;
}

.events-nav.next {
    right: -30px;
}

.events-nav.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.events-nav.disabled:hover {
    background: white;
    color: #6B7280;
    border-color: #E5E7EB;
    transform: translateY(-50%);
}

/* Event counter */
.events-counter {
    text-align: center;
    margin-top: 2rem;
    color: #6B7280;
    font-size: 0.9rem;
}

.events-counter .current {
    color: #4F46E5;
    font-weight: 600;
}

/* Session Detail Modal */
.session-modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.session-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease-out;
}

.session-modal-content {
    background: white;
    border-radius: 20px;
    padding: 3rem;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    position: relative;
    animation: slideInUp 0.3s ease-out;
}

.session-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #E5E7EB;
}

.session-modal-title {
    font-size: 2rem;
    font-weight: 700;
    color: #1F2937;
    margin: 0;
    flex: 1;
}

.session-modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: #6B7280;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
    margin-left: 1rem;
}

.session-modal-close:hover {
    background-color: #F3F4F6;
    color: #374151;
}

.session-modal-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    margin-bottom: 2rem;
    width: fit-content;
}

.session-modal-description {
    font-size: 1.1rem;
    line-height: 1.7;
    color: #374151;
    margin-bottom: 2rem;
}

.session-modal-sessions {
    margin-bottom: 2rem;
}

.session-modal-session {
    background: #F9FAFB;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid #4F46E5;
}

.session-modal-session h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1F2937;
    margin-bottom: 0.5rem;
}

.session-modal-session .speakers {
    color: #4F46E5;
    font-weight: 600;
    margin-bottom: 1rem;
}

.session-modal-session .duration {
    color: #6B7280;
    font-weight: 500;
    margin-bottom: 1rem;
}

.session-modal-session .topics {
    list-style: none;
    padding: 0;
}

.session-modal-session .topics li {
    padding: 0.25rem 0;
    color: #6B7280;
    position: relative;
    padding-left: 1.5rem;
}

.session-modal-session .topics li::before {
    content: "•";
    color: #4F46E5;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.session-modal-downloads {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid #E5E7EB;
}

.session-modal-downloads .download-link {
    padding: 1rem 2rem;
    font-size: 1rem;
    border: 2px solid #4F46E5;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Subscribe Section */
.subscribe {
    padding: 80px 0;
    background: linear-gradient(135deg, #1F2937 0%, #374151 100%);
    color: white;
}

.subscribe-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.subscribe-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.subscribe-text p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.7;
}

.subscribe-benefits {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.benefit {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.benefit i {
    color: #4F46E5;
    font-size: 1.2rem;
    width: 20px;
}

.newsletter-form {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 16px;
    backdrop-filter: blur(10px);
    text-align: center;
}

.form-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group input {
    flex: 1;
    padding: 1rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.9);
}

.form-group input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.3);
}

.form-note {
    font-size: 0.9rem;
    opacity: 0.7;
    text-align: center;
}

.subscribe-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.subscribe-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(79, 70, 229, 0.3);
}

/* Footer */
.footer {
    background-color: #1F2937;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #4F46E5;
}

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-section p {
    opacity: 0.8;
    line-height: 1.7;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-section ul li a:hover {
    opacity: 1;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    text-align: center;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

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

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

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

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

    .events-container {
        padding: 0 15px;
    }

    .events-nav {
        width: 40px;
        height: 40px;
    }

    .events-nav.prev {
        left: -20px;
    }

    .events-nav.next {
        right: -20px;
    }

    .event-tile {
        min-width: 300px;
        max-width: 350px;
    }

    .event-content h3 {
        font-size: 1.2rem;
    }

    .event-sessions {
        font-size: 0.85rem;
    }

    .event-description {
        font-size: 0.8rem;
    }

    .event-speakers {
        font-size: 0.8rem;
    }

    .btn-more-info {
        padding: 0.6rem 1.2rem;
        font-size: 0.8rem;
    }

    .subscribe-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .form-group {
        flex-direction: column;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .contact-links {
        flex-direction: column;
        gap: 1rem;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .session-card {
        padding: 2rem 1.5rem;
    }

    .founder-card {
        padding: 1.5rem;
    }

    .event-tile {
        padding: 1.5rem;
    }
}

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

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

.hero-content,
.session-card,
.founder-card,
.event-tile {
    animation: fadeInUp 0.6s ease-out;
}