.course-detail {
    padding-top: 90px;
}

/* === 강좌 헤더 === */
.course-header {
    padding: 60px 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
}

.course-header__main {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 40px;
    align-items: center;
}

.course-header__info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.course-header__title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin: 0;
}

.course-header__subtitle {
    font-size: 1.125rem;
    opacity: 0.9;
    margin: 0;
}

.course-header__image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.course-header__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* === 뱃지와 태그 === */
.badges {
    display: flex;
    gap: 8px;
}

.badge {
    padding: 6px 12px;
    background: rgba(255,255,255,0.2);
    border-radius: 20px;
    font-size: 0.875rem;
}

.course-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.course-tag {
    padding: 4px 10px;
    background: transparent;
    border: 1px solid rgba(255,255,255,0.4);
    border-radius: 4px;
    font-size: 0.875rem;
    margin-right: 4px;
    margin-bottom: 4px;
    display: inline-flex;
    align-items: center;
    transition: all 0.2s ease;
}

.course-tag:before {
    content: "#";
    margin-right: 3px;
    font-weight: bold;
    opacity: 0.8;
}

.course-tag:hover {
    background: rgba(255,255,255,0.15);
    transform: translateY(-2px);
}

/* === 강좌 콘텐츠 === */
.course-content {
    padding: 60px 0;
}

.course-grid {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 40px;
}

.course-info-content {
    width: 100%;
}

.course-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0;
}

.course-description {
    font-size: 1.125rem;
    line-height: 1.6;
    color: var(--color-cont-text);
}

/* === 커리큘럼 === */
.curriculum-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.curriculum-item {
    padding: 24px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.curriculum-header {
    margin-bottom: 16px;
}

.curriculum-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

.curriculum-title .week {
    color: var(--color-primary);
}

.curriculum-content {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.curriculum-content li {
    padding-left: 24px;
    position: relative;
    color: var(--color-cont-text);
}

.curriculum-content li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary);
}

/* === 수강신청 카드 === */
.course-sidebar {
    position: sticky;
    top: 100px;
    align-self: start;
}

.enrollment-card {
    padding: 24px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.enrollment-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.info-label {
    color: var(--color-cont-text);
}

.info-value {
    font-weight: 500;
}

/* === 수강 옵션 === */
.enrollment-options {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

.select-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.select-group label {
    font-size: 0.875rem;
    color: var(--color-cont-text);
}

.select-box {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-gray);
    border-radius: 8px;
    font-size: 1rem;
    color: var(--color-text);
    background-color: #fff;
    cursor: pointer;
    transition: all 0.2s;
}

.select-box:hover {
    border-color: var(--color-primary);
}

.select-box:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(10, 57, 129, 0.1);
}

/* === 가격 표시 === */
.enrollment-price {
    margin-bottom: 24px;
    padding: 16px;
    background: var(--color-lightgray);
    border-radius: 8px;
}

.total-price,
.discount-price,
.final-price {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.price-label {
    font-size: 1rem;
    color: var(--color-cont-text);
}

.price-amount {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.price-amount.discount {
    color: #e74c3c;
}

/* === 할인 정보 === */
.discount-info {
    margin: 15px 0;
    padding: 15px;
    background-color: #fcf8e3;
    border-radius: 5px;
    border-left: 4px solid #f0ad4e;
}

.discount-badge {
    font-weight: bold;
    color: #f0ad4e;
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.discount-message {
    font-size: 14px;
    color: #8a6d3b;
    margin: 0;
}

.discount-price {
    padding: 10px 0;
    border-bottom: 1px dashed #ddd;
}

.final-price {
    padding: 15px 0 5px;
    font-weight: bold;
}

/* === 버튼 === */
.btn-enroll {
    width: 100%;
    padding: 16px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-enroll:hover:not(:disabled) {
    background: var(--color-primary-dark);
}

.btn-enroll:disabled {
    background: var(--color-gray);
    cursor: not-allowed;
}

/* === 반응형 스타일 === */
@media screen and (max-width: 1023px) {
    .course-header__main {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .course-grid {
        grid-template-columns: 1fr;
    }

    .course-sidebar {
        position: static;
        order: 2;
    }
    
    .course-info-content {
        order: 1;
    }
    
    .enrollment-card {
        margin-top: 40px;
    }
}

@media screen and (max-width: 767px) {
    .course-header {
        padding: 40px 10px;
    }

    .course-header__title {
        font-size: 2rem;
    }

    .course-header__subtitle {
        font-size: 1rem;
    }

    .course-content {
        padding: 40px 0 120px;
    }

    .curriculum-item {
        padding: 20px;
    }
    
    /* 모바일에서 수강신청 카드 하단 고정 */
    .course-sidebar {
        /* position: fixed;
        bottom: 0;
        left: 0;
        right: 0; */
        z-index: 1000;
        background: white;
        border-top: 1px solid rgba(0,0,0,0.1);
        box-shadow: 0 -4px 20px rgba(0,0,0,0.1);
        order: 3;
    }
    
    .enrollment-card {
        padding: 16px 20px;
        margin: 0;
        border-radius: 0;
        box-shadow: none;
        max-width: none;
    }
    
    /* 모바일에서 강좌 정보 최적화 */
    .enrollment-info {
        margin-bottom: 16px;
        gap: 8px;
    }
    
    .info-item {
        padding-bottom: 12px;
        font-size: 14px;
    }
    
    .info-label {
        font-size: 13px;
    }
    
    .info-value {
        font-size: 13px;
        font-weight: 600;
    }
    
    /* 옵션 선택을 더 터치 친화적으로 */
    .enrollment-options {
        margin-bottom: 16px;
    }
    
    .select-box {
        padding: 14px 16px;
        font-size: 16px; /* iOS에서 줌 방지 */
        border-radius: 6px;
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
        background-position: right 12px center;
        background-repeat: no-repeat;
        background-size: 16px;
        appearance: none;
    }
    
    /* 가격 표시 최적화 */
    .enrollment-price {
        margin-bottom: 16px;
        padding: 12px 16px;
        background: #f8f9fa;
        border-radius: 6px;
    }
    
    .total-price, .discount-price, .final-price {
        margin-bottom: 8px;
    }
    
    .total-price:last-child, .final-price:last-child {
        margin-bottom: 0;
    }
    
    .price-amount {
        font-size: 1.25rem;
        font-weight: 700;
    }
    
    /* 구매 버튼 최적화 */
    .btn-enroll {
        padding: 18px 24px;
        font-size: 1.125rem;
        font-weight: 700;
        border-radius: 6px;
        min-height: 56px;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        transition: all 0.2s ease;
    }
    
    .btn-enroll:not(:disabled) {
        background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    }
    
    .btn-enroll:hover:not(:disabled) {
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(10, 57, 129, 0.3);
    }
    
    .btn-enroll:active:not(:disabled) {
        transform: translateY(0);
    }
    
    /* 할인 정보 모바일 최적화 */
    .discount-info {
        margin: 12px 0;
        padding: 12px;
        font-size: 14px;
    }
    
    .discount-badge {
        font-size: 14px;
        margin-bottom: 4px;
    }
    
    .discount-message {
        font-size: 13px;
        line-height: 1.4;
    }
}

@media screen and (max-width: 480px) {
    .course-content {
        padding: 30px 0 110px;
    }
    
    .enrollment-card {
        padding: 12px 16px;
    }
    
    .enrollment-info {
        margin-bottom: 12px;
        gap: 6px;
    }
    
    .info-item {
        padding-bottom: 10px;
        font-size: 13px;
    }
    
    .info-label {
        font-size: 12px;
    }
    
    .info-value {
        font-size: 12px;
        font-weight: 600;
    }
    
    .enrollment-options {
        margin-bottom: 12px;
    }
    
    .select-group {
        gap: 6px;
    }
    
    .select-group label {
        font-size: 14px;
        font-weight: 600;
    }
    
    .select-box {
        padding: 12px 14px;
        font-size: 16px;
    }
    
    .enrollment-price {
        padding: 10px 12px;
        margin-bottom: 12px;
    }
    
    .price-label {
        font-size: 14px;
    }
    
    .price-amount {
        font-size: 1.125rem;
    }
    
    .btn-enroll {
        padding: 16px 20px;
        font-size: 1rem;
        min-height: 52px;
    }
    
    .discount-info {
        margin: 10px 0;
        padding: 10px;
    }
    
    .discount-badge {
        font-size: 13px;
    }
    
    .discount-message {
        font-size: 12px;
    }
}