body {
    font-family: 'Roboto', sans-serif;
    background-color: #f4f4f9;
    color: #333;
    line-height: 1.6;
}

header {
    background-color: #007bff; /* Use a background color */
    color: white;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

header h1, header p, header a {
    z-index: 2;
}

header h1 {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

header p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

header a {
    margin: 0.5rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 2rem;
    color: #007bff;
    text-align: center;
}

.section {
    padding: 4rem 0;
    background-color: #f8f9fa;
}

.card {
    border: none;
    border-radius: 0.75rem;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.card-title {
    font-size: 1.5rem;
    font-weight: bold;
    color: #007bff;
}

.card-text {
    font-size: 1rem;
    color: #555;
}

.progress {
    height: 1.5rem;
    border-radius: 0.75rem;
    background-color: #e9ecef;
}

.progress-bar {
    background-color: #007bff;
}

.navbar {
    padding: 1rem 2rem;
    background-color: #007bff !important;
    background: linear-gradient(90deg, rgba(0,123,255,0.9) 0%, rgba(0,123,255,0.7) 100%);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: #f8f9fa;
}

.navbar-nav .nav-link {
    margin: 0 1rem;
    font-size: 1.1rem;
    color: #f8f9fa;
    transition: color 0.3s ease, background-color 0.3s ease;
}

.navbar-nav .nav-item:hover .nav-link {
    color: #ffc107;
    background-color: rgba(255, 255, 255, 0.1);
}

.navbar-toggler {
    border: none;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='rgba%288, 8, 8, 0.5%29' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
}

.footer {
    background-color: #007bff;
    color: #f8f9fa;
    padding: 2rem 0;
}

.footer .social-links a {
    color: #f8f9fa;
    transition: color 0.3s ease;
}

.footer .social-links a.youtube {
    color: #FF0000;
}

.footer .social-links a.linkedin {
    color: #1877F2;
}

.footer .social-links a.whatsapp {
    color: #25D366;
}

.footer p {
    margin: 0;
    font-size: 1rem;
}

.social-links a {
    margin: 0 10px;
    transition: transform 0.3s ease, color 0.3s ease;
}

.social-links a.linkedin {
    color: #0077b5; /* LinkedIn blue */
}

.social-links a.whatsapp {
    color: #25D366; /* WhatsApp green */
}

.social-links a.youtube {
    color: #FF0000; /* YouTube red */
}

.social-links a.github {
    color: #333; /* GitHub black */
}

.social-links a:hover {
    transform: scale(1.2);
}