/* Responsive Styles for Mobile and Tablet Devices */

/* Large devices (laptops/desktops, up to 1200px) */
@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }

    .hero-title {
        font-size: 3.5rem;
    }

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

/* Medium devices (tablets, up to 992px) */
@media (max-width: 992px) {
    .container {
        max-width: 720px;
    }

    .navbar-nav {
        padding: 1rem 0;
    }

    .nav-link {
        padding: 0.5rem 0;
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .about-image img {
        height: 350px;
    }
        
    .about-text {
        height: auto;
    }
    
    .about-stats {
        margin-top: 2rem;
    }

    .team-card {
        margin-bottom: 2rem;
    }

    .timeline-item {
        padding: 2rem;
    }

    .contact-info {
        margin-top: 3rem;
    }

    .track-card {
        padding: 1.5rem;
    }
        
    .track-icon {
        width: 50px;
        height: 50px;
    }
        
    .track-icon i {
        font-size: 1.25rem;
    }
        
    .track-title {
        font-size: 1.1rem;
    }
}

/* Small devices (mobile landscape, up to 768px) */
@media (max-width: 768px) {
    .container {
        max-width: 540px;
    }

    .navbar-brand {
        font-size: 1.5rem;
    }

    .hero-section {
        padding: 120px 0 80px;
    }

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

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

    .hero-buttons {
        flex-direction: column;
        gap: 1rem;
    }

    .hero-btn {
        width: 100%;
    }

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

    .section-padding {
        padding: 60px 0;
    }

    .about-content {
        text-align: center;
        padding: 2rem 1rem;
    }

    .feature-list {
        justify-content: center;
    }

    .stat-number {
        font-size: 2rem;
    }

    .team-category-title {
        font-size: 1.3rem;
    }

    .team-card {
        max-width: 100%;
    }

    .timeline-item {
        padding: 1.5rem;
    }

    .timeline-item::before {
        display: none;
    }

    .fees-table {
        overflow-x: auto;
    }

    .fees-row {
        grid-template-columns: 1fr;
    }

    .fees-cell {
        padding: 0.75rem;
        font-size: 0.9rem;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }

    .contact-form {
        padding: 1.5rem;
    }

    .about-image img {
        height: 300px;
    }
        
    .about-text {
        height: auto;
    }
        
    .about-content {
        padding: 1.5rem 0;
    }
        
    .about-stats {
        margin-top: 1.5rem;
    }

    .section-description {
        padding: 0 1rem;
    }
        
    .track-card {
        margin-bottom: 1rem;
    }
        
    .track-topics li {
        font-size: 0.9rem;
    }
}

/* Extra small devices (mobile portrait, up to 576px) */
@media (max-width: 576px) {
    .container {
        width: 100%;
        padding: 0 1rem;
    }

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

    .hero-subtitle {
        font-size: 0.9rem;
    }

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

    .about-image img {
        height: 250px;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .track-card {
        padding: 1.25rem;
    }
}

/* Mobile Responsive Styles */

/* Base Mobile Styles (up to 768px) */
@media (max-width: 768px) {
    /* Navigation */
    .navbar {
        padding: 0.5rem 1rem;
        background: rgba(255, 255, 255, 0.95);
    }

    .navbar-brand {
        font-size: 1.2rem;
    }

    .navbar-toggler {
        border: none;
        padding: 0.25rem 0;
    }

    .navbar-nav {
        background: var(--white);
        border-radius: 0 0 16px 16px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        padding: 1rem;
    }

    .nav-item {
        margin: 0.5rem 0;
        text-align: center;
    }

    .register-btn {
        margin: 0.5rem 0;
    }

    /* Hero Section */
    .hero-section {
        height: auto;
        min-height: 100vh;
    }

    .hero-content {
        padding: 6rem 1rem 3rem;
        text-align: center;
    }

    .hero-title {
        font-size: 2rem;
        line-height: 1.3;
    }

    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 1rem;
    }

    .hero-description {
        font-size: 0.9rem;
        max-width: 100%;
    }

    /* About Section */
    .about-image {
        margin-bottom: 2rem;
    }

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

    /* Conference Tracks */
    .tracks-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .track-card {
        margin-bottom: 0;
        height: auto;
    }

    .track-icon {
        margin-bottom: 1rem;
    }

    .track-topics {
        margin-top: 1rem;
    }

    /* Timeline */
    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        padding-left: 60px;
        padding-right: 15px;
        margin-bottom: 2rem;
    }

    .timeline-dot {
        left: 22px;
    }

    .timeline-content {
        width: 100%;
        padding: 1.25rem;
    }

    .timeline-date {
        position: relative;
        top: 0;
        left: 0;
        margin-bottom: 0.5rem;
        font-size: 0.9rem;
    }

    /* Committee Section */
    .committee-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .committee-card {
        padding: 1.25rem;
    }

    .committee-card h4 {
        font-size: 1.1rem;
    }

    .committee-card p {
        font-size: 0.9rem;
    }

    /* Fees Section */
    .fee-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .fee-card {
        margin: 0;
    }

    .fee-header {
        padding: 1.5rem;
    }

    .fee-body {
        padding: 1.5rem;
    }

    .fee-item {
        padding: 0.75rem 0;
    }

    /* Guidelines */
    .guideline-item {
        flex-direction: column;
        text-align: center;
        padding: 1.5rem;
        margin-bottom: 1rem;
    }

    .guideline-icon {
        margin: 0 auto 1rem;
    }

    .guideline-content {
        padding-left: 0;
    }

    .guideline-content h3 {
        font-size: 1.1rem;
    }

    .guideline-content p,
    .guideline-content ul {
        font-size: 0.9rem;
    }

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
        padding: 2rem 1rem;
    }

    .footer-col {
        margin-bottom: 1.5rem;
    }

    .footer-col h4::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .footer-links {
        justify-content: center;
    }

    .footer-links a {
        justify-content: center;
    }

    .social-links {
        justify-content: center;
        margin-top: 1rem;
    }

    .footer-bottom {
        padding: 1.5rem 1rem;
    }
}

/* Extra Small Devices (max-width: 480px) */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .section-subtitle {
        font-size: 0.85rem;
    }

    .track-card {
        padding: 1.25rem;
    }

    .timeline-content {
        padding: 1rem;
    }

    .committee-card {
        padding: 1rem;
    }

    .fee-header {
        padding: 1.25rem;
    }

    .fee-body {
        padding: 1.25rem;
    }

    .guideline-item {
        padding: 1.25rem;
    }

    .footer-bottom p {
        font-size: 0.8rem;
    }
}

/* Tablet Devices (768px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    .tracks-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .committee-container {
        grid-template-columns: repeat(2, 1fr);
    }

    .fee-container {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Landscape Mode */
@media (max-height: 480px) and (orientation: landscape) {
    .hero-section {
        height: auto;
    }

    .hero-content {
        padding: 4rem 1rem 2rem;
    }

    .navbar-collapse {
        max-height: 80vh;
        overflow-y: auto;
    }

    .section-padding {
        padding: 2rem 0;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .footer {
        display: none;
    }

    .hero-section {
        height: auto;
        padding: 2rem 0;
    }

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

    a[href]:after {
        content: " (" attr(href) ")";
    }
}