/* General Styles */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

/* Navigation Bar */
nav {
    background-color: #ffffff;
    padding: 1rem;
    color: #fff;
}

nav .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 100%;
    padding: 0 1rem;
    overflow-x: hidden;
}

nav .logo {
    font-size: 1.2rem; /* Smaller font for mobile */
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1rem;
    padding: 0;
}

nav a {
    color: #1f3b4d;
    text-decoration: none;
    font-size: 0.8rem;
}

/* Main Section */
.main-section {
    padding: 2rem 1rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.container h2 {
    margin-bottom: 30px;
    font-size: 1.5rem;
}

/* Certificate Box */
.cert-box {
    background-color: #1f3b4d;
    color: #ffffff;
    padding: 2rem;
    margin: 1rem;
    border: 1px solid #ddd;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

.cert-box h3 {
    margin-bottom: 1rem;
}

.download-btn {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: #ffcc00;
    color: #1f3b4d;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.download-btn:hover {
    background-color: #ffbb00;
}

/* Video Section */
.video-section {
    margin-top: 2rem;
}

.video-section h3 {
    font-size: 1.2rem;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* Aspect ratio 16:9 */
    height: 0;
    overflow: hidden;
    max-width: 100%;
    background-color: #ffffff;
}

.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Responsive Styles */
@media (max-width: 768px) {
    nav .logo {
        font-size: 1rem;
    }

    .cert-box {
        padding: 1.5rem;
        margin: 1rem auto;
        max-width: 90%;
    }

    .video-section h3 {
        font-size: 1rem;
    }

    .container h2 {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    nav .nav-container {
        flex-direction: row;
        align-items: flex-start;
        padding: 0;
        margin: 0 auto;
    }

    nav ul {
        flex-direction: row;
        gap: 0.5rem;
    }

    nav .logo {
        font-size: 0.9rem;
    }

    .download-btn {
        padding: 0.75rem 1.5rem;
    }

    .video-section h3 {
        font-size: 1rem;
    }
}