:root {
    --primary-orange: #F97316;
    --dark-orange: #EA580C;
    --white: #FFFFFF;
    --light-gray: #F8FAFC;
    --section-gray: #F1F5F9;
}

/* Section */
.syllabus-section {
    padding: 3rem 0;
    background: var(--section-gray);
}

.container {
    max-width: 56rem;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Title */
.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #0F172A;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--primary-orange);
    border-radius: 9999px;
}

/* Accordion */
.accordion {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.accordion-item {
    background: var(--white);
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(0, 0, 0, 0.04);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.accordion-item:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.accordion-item.active {
    border-color: var(--primary-orange);
    box-shadow: 0 4px 25px rgba(249, 115, 22, 0.12);
}

/* Accordion Button */
.accordion-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.3s ease;
}

.accordion-btn:hover {
    background: rgba(249, 115, 22, 0.03);
}

.semester-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    min-width: 2rem;
    background: rgba(249, 115, 22, 0.10);
    color: var(--primary-orange);
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 700;
    transition: all 0.3s ease;
}

.accordion-item.active .semester-badge {
    background: var(--primary-orange);
    color: var(--white);
}

.semester-title {
    flex: 1;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: #0F172A;
    transition: color 0.3s ease;
}

.accordion-item.active .semester-title {
    color: var(--primary-orange);
}

.accordion-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #94A3B8;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
    color: var(--primary-orange);
}

.accordion-icon svg {
    width: 1.25rem;
    height: 1.25rem;
}

/* Accordion Content */
.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 0 1.25rem;
}

.accordion-item.active .accordion-content {
    max-height: 300px;
    padding: 0 1.25rem 1.25rem;
}

/* Subjects Grid */
.subjects-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding-top: 0.25rem;
}

.subject-tag {
    padding: 0.35rem 0.9rem;
    background: var(--light-gray);
    color: #1E293B;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid transparent;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.01em;
}

.subject-tag:hover {
    background: rgba(249, 115, 22, 0.08);
    border-color: var(--primary-orange);
    color: var(--primary-orange);
    transform: translateY(-1px);
}

/* Responsive */
@media (min-width: 640px) {
    .syllabus-section {
        padding: 4rem 0;
    }
    
    .section-title {
        font-size: 1.75rem;
        margin-bottom: 2rem;
    }
    
    .section-title::after {
        width: 60px;
        height: 3px;
    }
    
    .accordion-btn {
        padding: 1.25rem 1.5rem;
    }
    
    .semester-title {
        font-size: 1.0625rem;
    }
    
    .semester-badge {
        width: 2.25rem;
        height: 2.25rem;
        min-width: 2.25rem;
        font-size: 0.8125rem;
    }
    
    .accordion-item.active .accordion-content {
        padding: 0 1.5rem 1.25rem;
    }
    
    .subjects-grid {
        gap: 0.6rem;
    }
    
    .subject-tag {
        padding: 0.4rem 1rem;
        font-size: 0.8125rem;
    }
}

@media (min-width: 1024px) {
    .syllabus-section {
        padding: 5rem 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section-title::after {
        width: 70px;
        height: 4px;
    }
    
    .accordion {
        gap: 1rem;
    }
    
    .accordion-btn {
        padding: 1.5rem 2rem;
    }
    
    .semester-title {
        font-size: 1.125rem;
    }
    
    .semester-badge {
        width: 2.5rem;
        height: 2.5rem;
        min-width: 2.5rem;
        font-size: 0.875rem;
    }
    
    .accordion-item.active .accordion-content {
        padding: 0 2rem 1.5rem;
    }
    
    .subject-tag {
        padding: 0.45rem 1.2rem;
        font-size: 0.875rem;
    }
}

@media (max-width: 480px) {
    .syllabus-section {
        padding: 2rem 0;
    }
    
    .section-title {
        font-size: 1.25rem;
    }
    
    .section-title::after {
        width: 35px;
        height: 2px;
        bottom: -4px;
    }
    
    .accordion-btn {
        padding: 0.85rem 1rem;
        gap: 0.75rem;
    }
    
    .semester-badge {
        width: 1.75rem;
        height: 1.75rem;
        min-width: 1.75rem;
        font-size: 0.65rem;
    }
    
    .semester-title {
        font-size: 0.875rem;
    }
    
    .accordion-icon svg {
        width: 1rem;
        height: 1rem;
    }
    
    .accordion-item.active .accordion-content {
        padding: 0 1rem 1rem;
    }
    
    .subjects-grid {
        gap: 0.4rem;
    }
    
    .subject-tag {
        padding: 0.25rem 0.7rem;
        font-size: 0.65rem;
    }
}