.set img {
    height: 80px;
    width: 90px;
}

:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --accent-color: #198754;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow-x: hidden;
}

.navbar {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 700;
}

.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url(img/banner.jpg) no-repeat center center;
    background-size: cover;
    color: white;
    padding: 100px 0;
    position: relative;
}

.section-title {
    position: relative;
    margin-bottom: 40px;
    padding-bottom: 15px;
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--accent-color);
}

.course-card {
    transition: transform 0.3s, box-shadow 0.3s;
    border: none;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 20px;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.staff-card {
    text-align: center;
    margin-bottom: 30px;
}

.staff-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 15px;
    border: 5px solid var(--light-color);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.testimonial-card {
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    padding: 20px;
    margin: 10px;
    transition: transform 0.3s;
}

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

.testimonial-img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 15px;
}

.event-card {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
    margin-bottom: 20px;
}

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

.event-date {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: var(--accent-color);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 14px;
}

footer {
    background-color: var(--dark-color);
    color: white;
    padding: 50px 0 20px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: white;
}

.social-icons a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 40px;
    margin-right: 10px;
    transition: all 0.3s;
}

.social-icons a:hover {
    background-color: var(--accent-color);
    transform: translateY(-3px);
}

.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background-color: var(--accent-color);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 50px;
    font-size: 20px;
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
}

@media (max-width: 768px) {
    .navbar-brand {
        font-size: 16px;
    }

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