/* =========================
   Scroll Animations
   ========================= */
/* Base animation styles */
.animate-on-scroll {
    opacity: 0;
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0) !important;
}

/* Fade in from bottom - for cards and sections */
.fade-in-up {
    transform: translateY(60px);
}

/* Fade in from left - for left-aligned content */
.fade-in-left {
    transform: translateX(-60px);
}

/* Fade in from right - for right-aligned content */
.fade-in-right {
    transform: translateX(60px);
}

/* Scale in - for important elements */
.scale-in {
    transform: scale(0.92);
}

.scale-in.animated {
    transform: scale(1) !important;
}

/* Stagger animations for children */
.stagger-children > * {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.stagger-children.animated > * {
    opacity: 1;
    transform: translateY(0);
}

/* Progressive delay for staggered items */
.stagger-children.animated > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-children.animated > *:nth-child(2) { transition-delay: 0.2s; }
.stagger-children.animated > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-children.animated > *:nth-child(4) { transition-delay: 0.4s; }
.stagger-children.animated > *:nth-child(5) { transition-delay: 0.5s; }
.stagger-children.animated > *:nth-child(6) { transition-delay: 0.6s; }

/* Slide in animations for text elements */
.slide-in-title {
    opacity: 0;
    transform: translateY(-30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-in-title.animated {
    opacity: 1;
    transform: translateY(0);
}

/* Subtle fade for paragraphs */
.fade-in-text {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease, transform 1s ease;
}

.fade-in-text.animated {
    opacity: 1;
    transform: translateY(0);
}
.stagger-children > * {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.stagger-children.animated > *:nth-child(1) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.1s;
}

.stagger-children.animated > *:nth-child(2) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.2s;
}

.stagger-children.animated > *:nth-child(3) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.3s;
}

.stagger-children.animated > *:nth-child(4) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.4s;
}

.stagger-children.animated > *:nth-child(5) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.5s;
}

.stagger-children.animated > *:nth-child(6) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.6s;
}

/* Text reveal animations */
.text-reveal {
    overflow: hidden;
}

.text-reveal span {
    display: inline-block;
    opacity: 0;
    transform: translateY(100%);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.text-reveal.animated span {
    opacity: 1;
    transform: translateY(0);
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .animate-on-scroll,
    .fade-in-up,
    .fade-in-left,
    .fade-in-right,
    .scale-in,
    .stagger-children > *,
    .text-reveal span {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
}

/* =========================
   Music Control Button
   ========================= */
.music-toggle {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 5px 25px rgba(196, 30, 58, 0.5);
    transition: var(--transition);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: musicPulse 2s ease-in-out infinite;
}

@keyframes musicPulse {
    0%, 100% {
        box-shadow: 0 5px 25px rgba(196, 30, 58, 0.5);
        transform: scale(1);
    }
    50% {
        box-shadow: 0 8px 35px rgba(196, 30, 58, 0.7);
        transform: scale(1.05);
    }
}

.music-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 35px rgba(196, 30, 58, 0.8);
    animation: none;
}

.music-toggle:active {
    transform: scale(0.95);
}

.music-toggle.muted {
    background: linear-gradient(135deg, #666, #444);
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.3);
    animation: none;
}

.music-toggle.muted:hover {
    background: linear-gradient(135deg, #777, #555);
}

.music-toggle i {
    transition: var(--transition);
}

.music-toggle.playing i {
    animation: soundWave 0.8s ease-in-out infinite;
}

@keyframes soundWave {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
}

/* Mobile positioning */
@media (max-width: 768px) {
    .music-toggle {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
}

/* =========================
   Google Translate Styling
   ========================= */
/* Hide Google Translate elements */
.goog-te-banner-frame {
    display: none !important;
}

.goog-te-balloon-frame {
    display: none !important;
}

body {
    top: 0 !important;
}

.skiptranslate {
    display: none !important;
}

#google_translate_element {
    display: none !important;
}

/* Hide Google Translate toolbar */
.goog-te-banner-frame.skiptranslate {
    display: none !important;
}

iframe.skiptranslate {
    display: none !important;
}

body.translated-ltr {
    top: 0 !important;
}

.goog-logo-link {
    display: none !important;
}

.goog-te-gadget {
    color: transparent !important;
}

/* =========================
   CSS Variables & Reset
   ========================= */
:root {
    --primary-color: #c41e3a;
    --primary-dark: #a01729;
    --primary-light: #e6233f;
    --secondary-color: #1a1a2e;
    --accent-color: #f39c12;
    --text-dark: #1a1a2e;
    --text-light: #ffffff;
    --text-gray: #666666;
    --bg-light: #f8f9fa;
    --bg-dark: #1a1a2e;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.2);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

/* =========================
   Typography
   ========================= */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

/* =========================
   Container & Layout
   ========================= */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* =========================
   Video Background
   ========================= */
.video-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    z-index: -1;
}

#youtube-player {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100vw;
    height: 100vh;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

@media (min-aspect-ratio: 16/9) {
    #youtube-player {
        height: 56.25vw;
    }
}

@media (max-aspect-ratio: 16/9) {
    #youtube-player {
        width: 177.78vh;
    }
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(26, 26, 46, 0.85) 0%, rgba(196, 30, 58, 0.7) 100%);
    z-index: 1;
}

/* =========================
   Navigation
   ========================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(26, 26, 46, 0.98);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-light);
    margin: 0;
    letter-spacing: 2px;
}

.logo h1 span {
    color: var(--primary-color);
}

.logo-subtitle {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 0;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

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

.mobile-menu-toggle {
    display: none;
    color: var(--text-light);
    font-size: 1.5rem;
    cursor: pointer;
}

/* =========================
   Language Switcher
   ========================= */
.language-switcher {
    position: relative;
    margin-left: 1rem;
}

.language-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 25px;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    font-weight: 500;
}

.language-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-color);
}

.language-btn .current-lang {
    font-weight: 600;
    letter-spacing: 0.5px;
}

.language-btn i:last-child {
    font-size: 0.7rem;
    transition: var(--transition);
}

.language-switcher.active .language-btn i:last-child {
    transform: rotate(180deg);
}

.language-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 200px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 1000;
}

.language-switcher.active .language-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.8rem 1.2rem;
    color: var(--text-dark);
    transition: var(--transition);
    cursor: pointer;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.lang-option:last-child {
    border-bottom: none;
}

.lang-option:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.lang-option.active {
    background: var(--primary-color);
    color: white;
}

.flag-icon {
    font-size: 1.3rem;
}

.lang-option span:last-child {
    font-size: 0.95rem;
    font-weight: 500;
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--bg-dark);
    z-index: 2000;
    transition: right 0.3s ease;
    padding: 2rem;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-close {
    text-align: right;
    font-size: 1.5rem;
    color: var(--text-light);
    cursor: pointer;
    margin-bottom: 2rem;
}

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.mobile-nav-link {
    color: var(--text-light);
    font-size: 1.1rem;
    font-weight: 500;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.mobile-nav-link:hover {
    color: var(--primary-color);
    padding-left: 10px;
}

/* Mobile Language Switcher */
.mobile-language-switcher {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-lang-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.mobile-lang-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.mobile-lang-option {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-light);
    font-size: 0.85rem;
    transition: var(--transition);
}

.mobile-lang-option:hover,
.mobile-lang-option.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

/* =========================
   Hero Section
   ========================= */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 8rem 0 4rem;
    color: var(--text-light);
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
    animation: fadeInUp 1s ease;
}

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

.hero-title {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.hero-title-main {
    font-size: 5rem;
    font-weight: 800;
    letter-spacing: 4px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    background: linear-gradient(135deg, #ffffff 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title-sub {
    font-size: 1.5rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 2px;
}

.hero-description {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 2rem auto;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
}

.hero-announcement {
    max-width: 900px;
    margin: 2rem auto;
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, rgba(196, 30, 58, 0.95), rgba(243, 156, 18, 0.95));
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(196, 30, 58, 0.4);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 10px 40px rgba(196, 30, 58, 0.4);
    }
    50% {
        box-shadow: 0 10px 50px rgba(196, 30, 58, 0.6);
    }
}

.hero-announcement i {
    font-size: 2rem;
    color: white;
    flex-shrink: 0;
}

.hero-announcement p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: white;
    margin: 0;
    text-align: left;
}

.hero-announcement strong {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin: 3rem 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-light);
    box-shadow: 0 5px 20px rgba(196, 30, 58, 0.4);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(196, 30, 58, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--text-light);
    border: 2px solid var(--text-light);
}

.btn-secondary:hover {
    background: var(--text-light);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.6rem 1.5rem;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* Hero Stats */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    max-width: 900px;
    margin: 4rem auto 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    text-shadow: 0 2px 10px rgba(196, 30, 58, 0.5);
}

.stat-label {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 0.5rem;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

.mouse {
    width: 25px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.7);
    border-radius: 20px;
    position: relative;
}

.wheel {
    width: 3px;
    height: 8px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% {
        opacity: 1;
        top: 8px;
    }
    100% {
        opacity: 0;
        top: 20px;
    }
}

.arrow span {
    display: block;
    width: 10px;
    height: 10px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.7);
    border-right: 2px solid rgba(255, 255, 255, 0.7);
    transform: rotate(45deg);
}

/* =========================
   Section Styles
   ========================= */
section {
    padding: 6rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 3rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-top: 1.5rem;
}

/* =========================
   About Section
   ========================= */
.about-section {
    background: var(--bg-light);
}

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

.about-text h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.about-text h3:first-child {
    margin-top: 0;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-gray);
    margin-bottom: 1.5rem;
}

.features-list {
    list-style: none;
    display: grid;
    gap: 1rem;
}

.features-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.1rem;
    color: var(--text-dark);
}

.features-list i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.feature-icon i {
    font-size: 1.8rem;
    color: white;
}

.feature-card h4 {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.feature-card p {
    font-size: 1rem;
    color: var(--text-gray);
    line-height: 1.6;
}

/* =========================
   Videos Section
   ========================= */
.videos-section {
    background: white;
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
}

.video-card {
    background: var(--bg-light);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.video-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    overflow: hidden;
    background: var(--bg-dark);
}

.video-thumbnail img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.video-card:hover .video-thumbnail img {
    transform: scale(1.05);
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 5px 30px rgba(196, 30, 58, 0.5);
}

.play-button:hover {
    transform: translate(-50%, -50%) scale(1.1);
    background: var(--primary-light);
}

.play-button i {
    color: white;
    font-size: 2rem;
    margin-left: 5px;
}

.video-info {
    padding: 2rem;
}

.video-info h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.video-info p {
    font-size: 1rem;
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

/* =========================
   Presentations Section
   ========================= */
.presentations-section {
    background: var(--bg-light);
}

.presentations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    max-width: 1400px;
    margin: 0 auto;
}

.presentation-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: var(--transition);
}

.presentation-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-10px);
}

.presentation-icon {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.presentation-card:hover .presentation-icon {
    transform: scale(1.1) rotate(5deg);
}

.presentation-icon i {
    font-size: 2.8rem;
    color: white;
}

.presentation-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.presentation-info h3 {
    font-size: 1.6rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.presentation-info p {
    font-size: 1rem;
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    flex: 1;
}

.presentation-details {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-bottom: 2rem;
}

.presentation-details li {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    color: var(--text-gray);
}

.presentation-details i {
    color: var(--primary-color);
    font-size: 1rem;
}

/* =========================
   Contact Section
   ========================= */
.contact-section {
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.contact-info > p {
    font-size: 1.1rem;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-method {
    display: flex;
    gap: 1.5rem;
    align-items: start;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 1.3rem;
    color: white;
}

.contact-details h4 {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-bottom: 0.3rem;
}

.contact-details p,
.contact-details a {
    font-size: 1rem;
    color: var(--text-gray);
    line-height: 1.6;
}

.contact-details a:hover {
    color: var(--primary-color);
}

.cta-box {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    padding: 2rem;
    border-radius: 15px;
    color: white;
    text-align: center;
}

.cta-box h4 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.cta-box p {
    font-size: 1rem;
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

/* Contact Form */
.contact-form-container h3 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 2rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
    color: var(--text-dark);
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    padding: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* =========================
   Footer
   ========================= */
.footer {
    background: var(--bg-dark);
    color: var(--text-light);
    padding: 3rem 0 1rem;
}

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

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-light);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-tagline {
    color: var(--primary-color);
    font-weight: 600;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-section i {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

/* =========================
   Video Modal
   ========================= */
.video-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3000;
}

.video-modal.active {
    display: block;
}

.video-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
}

.video-modal-content {
    position: relative;
    width: 90%;
    max-width: 1200px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 3001;
}

.video-modal-close {
    position: absolute;
    top: -50px;
    right: 0;
    background: var(--primary-color);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
}

.video-modal-close:hover {
    background: var(--primary-light);
    transform: rotate(90deg);
}

.video-modal-player {
    width: 100%;
    padding-top: 56.25%;
    position: relative;
    background: black;
    border-radius: 10px;
    overflow: hidden;
}

/* =========================
   Responsive Design
   ========================= */
@media (max-width: 1200px) {
    .container {
        padding: 0 1.5rem;
    }
    
    .hero-title-main {
        font-size: 4rem;
    }
}

@media (max-width: 992px) {
    .nav-links {
        display: none;
    }
    
    .language-switcher {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero-title-main {
        font-size: 3.5rem;
    }
    
    .hero-title-sub {
        font-size: 1.2rem;
    }
    
    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .videos-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .presentations-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 6rem 0 3rem;
    }
    
    .hero-title-main {
        font-size: 2.5rem;
        letter-spacing: 2px;
    }
    
    .hero-title-sub {
        font-size: 1rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-announcement {
        flex-direction: column;
        text-align: center;
        padding: 1.5rem;
    }
    
    .hero-announcement i {
        font-size: 1.5rem;
    }
    
    .hero-announcement p {
        font-size: 1rem;
        text-align: center;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    section {
        padding: 4rem 0;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .presentations-grid {
        grid-template-columns: 1fr;
    }
    
    .presentation-card {
        padding: 2rem;
    }
    
    .presentation-icon {
        width: 70px;
        height: 70px;
    }
    
    .presentation-icon i {
        font-size: 2.2rem;
    }
    
    .presentation-info h3 {
        font-size: 1.4rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .logo h1 {
        font-size: 1.3rem;
    }
    
    .logo-subtitle {
        font-size: 0.65rem;
    }
    
    .hero-title-main {
        font-size: 2rem;
    }
    
    .hero-title-sub {
        font-size: 0.9rem;
    }
    
    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .feature-card,
    .presentation-card {
        padding: 1.5rem;
    }
    
    .video-info {
        padding: 1.5rem;
    }
    
    .presentation-details {
        flex-direction: column;
        gap: 0.5rem;
    }
}