body, h2, h3, p, button, textarea {
    margin: 0; padding: 0; font-family: Arial, sans-serif;
}

body {
    background: #000; 
    color: #fff;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    padding: 40px;
}

.course-box {
    background: #111;
    padding: 20px;
    border-radius: 10px;
    border: 1px solid #333;
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.course-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(255,255,255,0.2);
}

.course-box h3 { margin-bottom: 10px; font-size: 18px; }
.course-box p { font-size: 14px; color: #ccc; margin-bottom: 15px; }

.course-box button {
    margin-right: 8px;
    padding: 6px 12px;
    border: 1px solid #fff;
    background: #000;
    color: #fff;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
}
.course-box button:hover {
    background: #fff;
    color: #000;
}

.popup {
    display: none;
    position: fixed;
    top:0; left:0; width:100%; height:100%;
    background: rgba(0,0,0,0.8);
    justify-content: center;
    align-items: center;
    z-index: 100;
}

.popup-content {
    background: #111;
    padding: 25px;
    border-radius: 10px;
    max-width: 500px;
    width: 90%;
    position: relative;
    color: #fff;
}

.popup-content h2 { margin-bottom: 15px; }
.popup-content p { margin-bottom: 10px; color: #ccc; }

.popup .close {
    position: absolute;
    top:10px; right:15px;
    cursor: pointer; font-size: 24px;
}

textarea {
    width: 100%; padding: 8px; margin-top: 10px;
    border-radius: 5px; border: 1px solid #333;
    background: #000; color: #fff; resize: none;
}
textarea::placeholder { color: #777; }
.popup-content button { margin-top: 10px; }