/* Courses layout */
.courses-row {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 30px;
}

/* Individual course cards */
.course-card {
    background-color: var(--card-bg); /* instead of #fff */
    color: var(--text-color);         /* ensures text is readable in dark mode */
    border-radius: 12px;
    padding: 2rem;
    flex: 1 1 300px;
    max-width: 480px;
    box-shadow: var(--shadow, 0 8px 20px rgba(0,0,0,0.1));
    display: flex;
    flex-direction: column;
    transition: transform 0.6s ease, box-shadow 0.6s ease, opacity 0.6s ease;
    opacity: 0;
    transform: translateY(20px);
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover, 0 12px 25px rgba(0,0,0,0.15));
}

/* Headers inside cards */
.course-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color, #004080);
}

/* Paragraph text inside cards */
.course-card p {
    margin-bottom: 0.8rem;
    line-height: 1.5;
    color: var(--text-color);
}

/* CTA button */
.course-card .cta-button {
    margin-top: auto;
    text-align: center;
    background: #0070c0;
    color: #fff;
    padding: 0.8rem 1rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    transition: background 0.3s ease;
}

.course-card .cta-button:hover {
    background: #005a99;
}

/* Active state when visible (fade-in animation) */
.course-card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Download button row */
/* Download button row */
.download-row {
    text-align: center;
    margin-bottom: 50px;
}

.download-row .cta-button {
    display: inline-block;
    padding: 0.8rem 1.2rem;
    border-radius: 6px;
    font-weight: bold;
    text-decoration: none;
    background-color: var(--download-bg, #0070c0); /* default light theme blue */
    color: var(--download-color, #fff);           /* default white text */
    transition: background 0.3s ease, color 0.3s ease;
}

.download-row .cta-button:hover {
    background-color: var(--download-hover, #005a99);
    color: var(--download-color, #fff);
}


/* Special styling for Network Security course */
.ns-course {
    max-width: 600px;
    margin: 0 auto;
}