* {
    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: #f8f9fa;
}

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

/* Header */
header {
    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Main Content */
main {
    padding: 4rem 0;
}

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

.hero h2 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.hero p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: #555;
}

/* Video Section */
.video-section {
    background: white;
    border-radius: 15px;
    padding: 3rem;
    margin-bottom: 4rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
}

.video-section h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.video-thumbnail {
    position: relative;
    display: inline-block;
    cursor: pointer;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
    transition: transform 0.3s ease;
}

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

.video-thumbnail img {
    width: 100%;
    max-width: 600px;
    height: auto;
    display: block;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.play-button::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 25px solid #3498db;
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    margin-left: 5px;
}

.video-thumbnail:hover .play-button {
    background: rgba(52, 152, 219, 0.9);
}

.video-thumbnail:hover .play-button::after {
    border-left-color: white;
}

/* Content Sections */
.content-section {
    background: white;
    border-radius: 15px;
    padding: 3rem;
    margin-bottom: 2rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
}

.content-section h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #2c3e50;
    border-left: 4px solid #3498db;
    padding-left: 1rem;
}

.content-section p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #555;
    text-align: justify;
}

/* Contact Section */
.contact-section {
    background: linear-gradient(135deg, #34495e 0%, #2c3e50 100%);
    color: white;
    border-radius: 15px;
    padding: 3rem;
    margin-bottom: 2rem;
}

.contact-section h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    text-align: center;
}

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

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

.contact-item h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #ecf0f1;
}

.contact-item p {
    font-size: 1rem;
    opacity: 0.9;
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
}

.lightbox-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 800px;
    max-height: 90%;
}

.lightbox video {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

.close-btn {
    position: absolute;
    top: -40px;
    right: 0;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.3s ease;
}

.close-btn:hover {
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    header p {
        font-size: 1rem;
    }

    .hero h2 {
        font-size: 1.8rem;
    }

    .video-section, .content-section, .contact-section {
        padding: 2rem;
        margin-bottom: 2rem;
    }

    .play-button {
        width: 60px;
        height: 60px;
    }

    .play-button::after {
        border-left: 20px solid #3498db;
        border-top: 12px solid transparent;
        border-bottom: 12px solid transparent;
    }

    .contact-info {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .lightbox-content {
        width: 95%;
    }
}

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

    .video-section, .content-section, .contact-section {
        padding: 1.5rem;
    }

    header h1 {
        font-size: 1.7rem;
    }

    .hero h2 {
        font-size: 1.5rem;
    }
}