/* General Body */
body {
    background: linear-gradient(135deg, #eef2f7, #f8fbff);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}


/* Heading */
h2 {
    color: #2c3e50;
}


/* Duration Buttons */
.duration {
    border-radius: 25px;
    font-weight: 500;
    transition: 0.3s;
}

.duration:hover {
    transform: translateY(-2px);
}


/* Course Cards */
.card {
    cursor: pointer;
    border: none;
    border-radius: 15px;
    transition: all 0.3s ease;
    background: #ffffff;
}

.card:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

/* Selected Course */
.course.border-primary {
    border-width: 2px !important;
    box-shadow: 0 0 10px rgba(13,110,253,0.4);
}


/* Payment Plan Box */
.plan-box {
    border: 1px solid #e0e0e0;
    padding: 15px 18px;
    border-radius: 12px;
    margin-bottom: 12px;
    background: #ffffff;
    transition: all 0.3s ease;
    position: relative;
}

.plan-box:hover {
    border-color: #0d6efd;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}


/* Radio Styling */
.plan-box input[type="radio"] {
    transform: scale(1.2);
    cursor: pointer;
}


/* Highlight Selected Plan */
.plan-box.selected {
    border: 2px solid #198754;
    background: #f0fff5;
}


/* Installment Text */
.plan-box strong {
    font-size: 16px;
}

.plan-box small {
    color: #666;
}


/* Pay Button */
#payBtn {
    display: none;
    font-size: 20px;
    font-weight: bold;
    padding: 12px 30px;
    border-radius: 30px;
    transition: all 0.3s ease;
}

#payBtn:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(25,135,84,0.4);
}


/* Syllabus Button */
.btn-outline-secondary {
    border-radius: 20px;
}


/* Responsive */
@media (max-width: 768px) {
    .card {
        margin-bottom: 15px;
    }

    #payBtn {
        width: 100%;
    }
}