.student_registration .registration-form {

    backdrop-filter: blur(20px);
    padding: 40px;
    border-radius: 20px;
    box-shadow: rgba(0, 0, 0, 0.1) 0px 0px 5px 0px, rgba(0, 0, 0, 0.1) 0px 0px 1px 0px;
    animation: slideUp 0.8s ease-out;
}

.student_registration .form-header {
    text-align: center;
    margin-bottom: 40px;
}

.student_registration .form-header h2 {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
}

.student_registration .form-header p {
    color: #666;
    font-size: 16px;
}

.student_registration .form-group {
    position: relative;
}

.student_registration .form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
    font-size: 14px;
}

.student_registration .form-group input,
.student_registration .form-group select {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e1e5e9;
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #fafbfc;
}

.student_registration .form-group input:focus,
.student_registration .form-group select:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

.student_registration .form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.student_registration .form-section {
    background: #f8f9ff;
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 30px;
    border: 1px solid #e1e5e9;
}

.student_registration .section-header {
    margin-bottom: 20px;
}

.student_registration .section-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
}

.student_registration .checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.student_registration .checkbox-item {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 10px;
    border-radius: 10px;
    transition: all 0.3s ease;
    background: white;
    border: 2px solid #e1e5e9;
    position: relative;
    overflow: hidden;
}

.student_registration .checkbox-item:hover {
    background: linear-gradient(135deg, #f0f4ff, #e8f0ff);
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.1);
}

.student_registration .checkbox-item input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.student_registration .checkmark {
    height: 18px;
    width: 18px;
    background-color: white;
    border: 2px solid #667eea;
    border-radius: 4px;
    margin-right: 12px;
    position: relative;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.student_registration .checkbox-item input[type="checkbox"]:checked+.checkmark {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-color: #667eea;
}

.student_registration .checkbox-item input[type="checkbox"]:checked+.checkmark::after {
    content: "✓";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 14px;
    font-weight: bold;
}

.student_registration .label-text {
    font-size: 14px;
    font-weight: 500;
    color: #333;
    user-select: none;
}

.student_registration .category-select {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #333;
    border: none;
    cursor: pointer;
}

.cource_section_main {
    width: 300px;
}

.student_registration .category-select option {
    background: white;
    color: #333;
}

.student_registration .course-categories {
    margin-top: 20px;
}

.student_registration .category-group {
    margin-top: 20px;
    animation: fadeIn 0.5s ease-out;
    display: none;
}

.student_registration .category-group.active {
    display: block;
}

.student_registration .category-title {
    margin-bottom: 15px;
}

.student_registration .category-title h4 {
    font-size: 18px;
    color: #333;
    margin-bottom: 5px;
}

.student_registration .submit-btn {
    padding: 18px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 20px;
}

.student_registration .submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.student_registration .submit-btn:active {
    transform: translateY(-1px);
}

.student_registration .btn-wave {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.student_registration .submit-btn:hover .btn-wave {
    left: 100%;
}

/* Animations */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .student_registration .registration-form {
        padding: 25px;
        margin: 10px;
    }

    .student_registration .form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .student_registration .checkbox-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 10px;
    }

    .student_registration .form-header h2 {
        font-size: 26px;
    }

    .student_registration .form-section {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .student_registration .checkbox-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .student_registration .checkbox-item {
        padding: 10px;
        font-size: 14px;
    }

    .student_registration .checkmark {
        height: 18px;
        width: 18px;
    }

    .student_registration .form-group input,
    .student_registration .form-group select {
        padding: 12px 15px;
    }

    .cource_section_main {
        width: 290px;
    }
}

@media (max-width:376px) {
    .student_registration .checkbox-grid {
        grid-template-columns: 1fr;
    }

    .student_registration .form-row {
        gap: 12px;
    }

    .cource_section_main {
        width: 240px;
    }
}

/* Additional hover effects for better UX */
.student_registration .form-group input:hover,
.student_registration .form-group select:hover {
    border-color: #c1c5c9;
}

.student_registration .checkbox-item input[type="checkbox"]:checked+.checkmark {
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.student_registration .category-select:focus {
    outline: 2px solid rgba(102, 126, 234, 0.3);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Loading state for submit button */
.student_registration .submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.student_registration .submit-btn:disabled:hover {
    box-shadow: none;
    transform: none;
}

/* Success state styling */
.student_registration .submit-btn.success {
    background: linear-gradient(135deg, #56ab2f, #a8e6cf);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
    }
}