/* Custom Animations and Styles */

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

:root {
    --primary-teal: #0d9488;
    --primary-blue: #2563eb;
    --primary-purple: #7c3aed;
    --font-heading: 'Playfair Display', serif;
    --font-hero: 'Cinzel', serif;
    --font-body: 'Poppins', sans-serif
}

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

body {
    font-family: var(--font-body);
}

/* Typography */
h1, h2, h3, .hero-title, .section-title {
    font-family: var(--font-heading);
}

.hero-title {
    font-family: var(--font-hero);
    font-size: clamp(3rem, 10vw, 7rem);
    letter-spacing: 0.15em;
    font-weight: 400;
    color: #F4E4C1;
    opacity: 0;
    animation: fadeInUp 1.2s ease-out 0.3s forwards;
}

.hero-subtitle {
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: 0.03em;
    opacity: 0;
    animation: fadeInUp 1.2s ease-out 0.8s forwards;
}

.hero-date-info {
    opacity: 0;
    animation: fadeInUp 1.2s ease-out 1.2s forwards;
}

.hero-buttons {
    opacity: 0;
    animation: fadeInUp 1.2s ease-out 1.6s forwards;
}

.hero-scroll-indicator {
    opacity: 0;
    animation: fadeIn 1s ease-out 2.5s forwards;
}

.section-title {
    letter-spacing: -0.01em;
}

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

.hero-bg {
    background-image: url('hero.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* Hero Info Cards */
.hero-info-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    padding: 1.5rem;
    color: white;
    transition: all 0.3s ease;
}

.hero-info-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

/* Hero Buttons */
.hero-btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.25rem;
    background: white;
    color: var(--primary-teal);
    font-weight: 600;
    font-size: 1.125rem;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    white-space: nowrap;
}

.hero-btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.3);
    background: #f0fdfa;
}

.hero-btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.25rem;
    background: transparent;
    color: white;
    font-weight: 600;
    font-size: 1.125rem;
    border-radius: 50px;
    border: 2px solid white;
    text-decoration: none;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.hero-btn-secondary:hover {
    background: white;
    color: var(--primary-teal);
    transform: translateY(-3px);
}

@media (min-width: 640px) {
    .hero-btn-primary,
    .hero-btn-secondary {
        padding: 0.875rem 1.75rem;
    }
}

@media (min-width: 768px) {
    .hero-btn-primary,
    .hero-btn-secondary {
        padding: 1rem 2.5rem;
    }
}

/* Navigation Links */
.nav-link {
    position: relative;
    color: white;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: #99f6e4;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: white;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* Active nav link */
.nav-link.active-nav {
    color: #99f6e4;
}

.nav-link.active-nav::after {
    width: 100%;
}

.mobile-nav-link {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    transition: color 0.3s ease;
}

.mobile-nav-link:hover {
    color: var(--primary-teal);
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary-teal), var(--primary-blue));
    color: white;
    font-weight: 600;
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(13, 148, 136, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(13, 148, 136, 0.4);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    padding: 1rem 2rem;
    background: white;
    color: var(--primary-teal);
    font-weight: 600;
    border-radius: 12px;
    border: 2px solid var(--primary-teal);
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--primary-teal);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(13, 148, 136, 0.3);
}

/* Cards */
.card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 1.75rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    text-align: center;
}

.card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

/* Venue and Contact Section spacing improvements */
section .card {
    line-height: 1.7;
    text-align: left;
}

section .card .flex.items-start {
    text-align: left;
}

section .card h3 {
    line-height: 1.4;
    text-align: left;
}

section .card p,
section .card ul {
    text-align: left;
}

#contact .space-y-4 > div {
    margin-bottom: 1.25rem;
}

#contact h3 {
    line-height: 1.3;
}

/* Gradient card hover - maintains gradient background */
.card-gradient:hover {
    background: linear-gradient(to bottom right, #0d9488, #2563eb) !important;
    box-shadow: 0 12px 40px rgba(13, 148, 136, 0.4);
}

/* Theme Cards */
.theme-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Speaker Cards */
.speaker-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
}

.speaker-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Speaker Card Slider - Cleaner version */
.speaker-card-slider {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 0;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.speaker-card-slider:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

.speaker-card-slider h3,
.speaker-card-slider p {
    padding: 0 1.5rem;
}

.speaker-card-slider h3 {
    padding-top: 1rem;
}

.speaker-card-slider p:last-child {
    padding-bottom: 1.5rem;
}

.theme-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
}

.theme-list {
    list-style: none;
    text-align: left;
    line-height: 1.8;
}

.theme-list li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.75rem;
}

.theme-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: #5eead4;
    font-weight: bold;
}

/* Animations */
@keyframes blob {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -50px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

.animate-blob {
    animation: blob 7s infinite;
}

.animation-delay-2000 {
    animation-delay: 2s;
}

.animation-delay-4000 {
    animation-delay: 4s;
}

/* Fade In Animations */
.fade-in {
    animation: fadeIn 1s ease-in;
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Intersection Observer triggered animations */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-section.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Table */
@media (max-width: 768px) {
    table {
        font-size: 0.875rem;
    }

    th, td {
        padding: 0.75rem 0.5rem !important;
    }
}

/* Glassmorphism effect */
.glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-teal), var(--primary-blue));
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--primary-blue), var(--primary-purple));
}

/* Selection */
::selection {
    background: var(--primary-teal);
    color: white;
}

/* Smooth transitions */
* {
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Hover effects for links */
a {
    text-decoration: none;
}

/* Image lazy loading blur effect */
img {
    transition: filter 0.3s ease;
}

img.loading {
    filter: blur(10px);
}

img.loaded {
    filter: blur(0);
}

/* Section spacing */
section {
    position: relative;
    overflow: hidden;
}

/* Gradient text */
.gradient-text {
    background: linear-gradient(135deg, #14b8a6, #06b6d4, #0ea5e9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* Focus states for accessibility */
a:focus,
button:focus {
    outline: 2px solid var(--primary-teal);
    outline-offset: 4px;
}

/* Print styles */
@media print {
    nav,
    footer {
        display: none;
    }

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

/* Call for Papers - Desktop text alignment fix */
#call-papers .card li {
    display: flex;
    align-items: flex-start;
    text-align: left;
}

#call-papers .card li span:first-child {
    flex-shrink: 0;
    margin-top: 0.125rem;
}

#call-papers .card li span:last-child {
    flex: 1;
    text-align: left;
}

#call-papers .bg-gradient-to-br li {
    display: flex;
    align-items: flex-start;
    text-align: left;
}

#call-papers .bg-gradient-to-br li span:first-child {
    flex-shrink: 0;
    margin-top: 0.125rem;
}

#call-papers .bg-gradient-to-br li span:last-child {
    flex: 1;
    text-align: left;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (max-width: 768px) {
    /* Elegant Card Layout for Mobile Registration Table */
    #registration table {
        border: 0;
        background-color: transparent !important;
        display: block;
    }

    #registration table thead {
        display: none; /* Hide headers completely for cleaner look */
    }

    #registration table tbody {
        background-color: transparent !important;
        display: block;
    }

    #registration table tr {
        display: block;
        background: rgba(255, 255, 255, 0.95) !important;
        backdrop-filter: blur(10px);
        border: 1px solid rgba(13, 148, 136, 0.2);
        border-radius: 20px;
        padding: 1.5rem;
        margin-bottom: 1.5rem;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        transition: all 0.3s ease;
    }

    #registration table tr:hover {
        transform: translateY(-4px);
        box-shadow: 0 8px 30px rgba(13, 148, 136, 0.15);
        border-color: rgba(13, 148, 136, 0.4);
    }

    #registration table td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.875rem 0;
        border: none;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        text-align: left;
    }

    #registration table td:last-child {
        border-bottom: 0;
        padding-bottom: 0;
    }

    #registration table td:first-child {
        border-bottom: 2px solid rgba(13, 148, 136, 0.2);
        padding-bottom: 1rem;
        margin-bottom: 0.5rem;
        font-size: 1.125rem;
        font-weight: 700;
        color: #0d9488;
        display: block;
        text-align: center;
    }

    #registration table td::before {
        content: attr(data-label);
        font-weight: 600;
        text-transform: uppercase;
        font-size: 0.75rem;
        letter-spacing: 0.05em;
        color: #6b7280;
        flex-shrink: 0;
    }

    #registration table td:first-child::before {
        content: '';
        display: none;
    }

    /* Right-aligned values with emphasis */
    #registration table td:not(:first-child) {
        font-size: 1rem;
        font-weight: 600;
        color: #0d9488;
    }

     .items-start {
    align-items: center !important;
  }

    /* Call for Papers Mobile Optimization */
    #call-papers .card {
        margin-bottom: 1.5rem;
        padding: 1.25rem !important;
    }

    #call-papers .card h3 {
        font-size: 1.125rem !important;
        margin-bottom: 1rem !important;
        flex-direction: column;
        align-items: flex-start !important;
        gap: 0.5rem;
    }

    #call-papers .card h3 svg {
        margin-right: 0 !important;
    }

    #call-papers .card ul {
        margin-top: 0.75rem;
    }

    #call-papers .card li {
        font-size: 0.875rem;
        line-height: 1.5;
        align-items: flex-start !important;
        margin-bottom: 0.75rem;
        text-align: left !important;
    }

    #call-papers .card li span:first-child {
        flex-shrink: 0;
        margin-top: 0.125rem;
    }

    #call-papers .card li span:last-child {
        margin-right: 0 !important;
        text-align: left !important;
        display: block;
    }

    /* Publication section mobile */
    #call-papers .bg-gradient-to-br {
        padding: 1.25rem !important;
    }

    #call-papers .bg-gradient-to-br h3 {
        font-size: 1.25rem !important;
        margin-bottom: 1.25rem !important;
    }

    #call-papers .bg-gradient-to-br h4 {
        font-size: 1rem !important;
        margin-bottom: 0.75rem !important;
    }

    #call-papers .bg-gradient-to-br li {
        font-size: 0.875rem;
        line-height: 1.5;
        margin-bottom: 0.5rem;
    }

    /* Venue Section Mobile Optimization */
    section .card {
        padding: 1.25rem !important;
        text-align: left !important;
    }

    section .card .flex.items-start {
        flex-direction: column;
        align-items: flex-start !important;
        text-align: left !important;
    }

    section .card .w-12.h-12 {
        margin-bottom: 0.75rem;
        margin-left: 0;
    }

    section .card .space-x-4 {
        gap: 0 !important;
    }

    section .card .space-x-4 > div {
        margin-left: 0 !important;
        padding-left: 0 !important;
    }

    section .card h3 {
        font-size: 1.125rem !important;
        margin-bottom: 0.75rem !important;
        text-align: left !important;
        margin-left: 0 !important;
        padding-left: 0 !important;
    }

    section .card p,
    section .card li {
        font-size: 0.875rem;
        line-height: 1.6;
        text-align: left !important;
        margin-left: 0 !important;
        padding-left: 0 !important;
    }

    section .card ul {
        margin-top: 0.5rem;
        text-align: left !important;
        margin-left: 0 !important;
        padding-left: 0 !important;
    }

    section .card ul li {
        margin-bottom: 0.5rem;
        text-align: left !important;
        padding-left: 0 !important;
    }

    /* Contact Section Mobile Optimization */
    #contact {
        padding-top: 3rem !important;
        padding-bottom: 3rem !important;
    }

    #contact .grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    #contact h3 {
        font-size: 1.25rem !important;
        margin-bottom: 1rem !important;
    }

    #contact .space-y-4 {
        gap: 1rem;
    }

    #contact .flex.items-start {
        align-items: flex-start !important;
    }

    #contact .flex.items-start.space-x-3 {
        gap: 0.75rem;
    }

    #contact p,
    #contact a {
        font-size: 0.875rem;
        line-height: 1.6;
    }

    #contact .font-medium {
        font-size: 0.875rem;
        margin-bottom: 0.25rem;
    }

    #contact .text-gray-300 {
        font-size: 0.875rem;
    }
}

/* VIP Speaker Cards */
.vip-speaker-card {
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.vip-speaker-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

/* Speaker Carousel Styles */
.speaker-carousel-item {
    transition: all 0.3s ease;
}

.speaker-carousel-item:hover {
    transform: scale(1.05);
}

/* Carousel Navigation Dots */
.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel-dot:hover {
    background: rgba(255, 255, 255, 0.5);
}

.carousel-dot.active {
    width: 24px;
    border-radius: 4px;
    background: linear-gradient(90deg, #14b8a6, #0ea5e9);
}

/* Mobile Responsive VIP Cards & Carousel */
@media (max-width: 768px) {
    .vip-speaker-card {
        padding: 0.75rem;
        border-radius: 16px;
        overflow: hidden;
    }

    .vip-speaker-card h3 {
        font-size: 0.8rem !important;
        line-height: 1.2;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    .vip-speaker-card p {
        font-size: 0.65rem !important;
        line-height: 1.3;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    /* Mobile carousel - use native scroll instead of JS transform */
    .carousel-overflow-wrapper {
        overflow-x: auto !important;
        overflow-y: visible !important;
        margin: 0 -1rem;
        padding: 0 1rem;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .carousel-overflow-wrapper::-webkit-scrollbar {
        display: none;
    }

    #speakerCarousel {
        transform: none !important; /* Disable JS transform on mobile */
        padding-right: 1rem;
    }

    .speaker-carousel-item {
        scroll-snap-align: center;
    }
}

/* Extra small screens (Galaxy S8 and similar - 360px and below) */
@media (max-width: 400px) {
    .vip-speaker-card {
        padding: 0.5rem;
        border-radius: 12px;
    }

    .vip-speaker-card h3 {
        font-size: 0.7rem !important;
        margin-bottom: 0.125rem !important;
    }

    .vip-speaker-card p {
        font-size: 0.6rem !important;
        line-height: 1.2;
    }

    /* Smaller VIP images on extra small screens */
    .vip-speaker-card .w-36 {
        width: 5rem !important;
        height: 5rem !important;
    }

    .vip-speaker-card .mb-4 {
        margin-bottom: 0.5rem !important;
    }

    /* Smaller badge text */
    .vip-speaker-card .absolute.-bottom-2 {
        padding: 0.125rem 0.375rem !important;
        font-size: 8px !important;
    }
}

/* Speaker Modal Styles */
#speakerModal.show {
    display: flex;
}

#speakerModal.show #modalContent {
    transform: scale(1);
    opacity: 1;
}

#modalContent {
    animation: modalSlideIn 0.3s ease-out forwards;
}

@keyframes modalSlideIn {
    from {
        transform: scale(0.9) translateY(20px);
        opacity: 0;
    }
    to {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

#speakerModal.closing #modalContent {
    animation: modalSlideOut 0.2s ease-in forwards;
}

@keyframes modalSlideOut {
    from {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
    to {
        transform: scale(0.9) translateY(20px);
        opacity: 0;
    }
}