/* 서브젝트 페이지 전용 스타일 */

/* 헤더 콘텐츠 스타일 */
.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 1;
}

.back-link {
    display: flex;
    align-items: center;
    color: var(--frost-white);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    padding: 5px 10px;
    border-radius: 6px;
}

.back-link:hover {
    background-color: rgba(255, 255, 255, 0.15);
    transform: translateX(-3px);
}

.back-arrow {
    margin-right: 8px;
    font-size: 1.2rem;
}

.page-title {
    text-align: center;
}

.page-title h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 5px;
    margin-top: 20px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
    color: var(--frost-white);
}

.page-subtitle {
    font-size: 1.2rem;
    opacity: 1;
    color: #1e3a8a;
    font-weight: 700;
    margin-top: 8px;
    padding: 10px 20px;
    background-color: rgba(255, 255, 255, 0.9);
    border: 2px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(15px);
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.5);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.page-subtitle-fixed {
    font-size: 1.2rem;
    opacity: 1;
    color: #1e3a8a;
    font-weight: 700;
    margin-top: 8px;
    padding: 10px 20px;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    border: 2px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(15px);
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.5);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* 서브젝트 페이지의 펭귄 데코레이션 위치 조정 */
.penguin-decoration {
    font-size: 5rem;
    right: 20px;
    top: -15px;
    transform: rotate(15deg);
    opacity: 0.12;
    filter: drop-shadow(0 1px 2px rgba(29, 47, 78, 0.1));
}

/* 연도별 리스트 스타일 - Grid Layout 통일 */
.years-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

/* year-item은 components.css의 공통 스타일을 상속받음 */
.year-item .year-header {
    background-color: transparent;
    color: inherit;
    padding: 0;
    margin-bottom: 10px;
    /* 하단 마진 약간 감소 (12px → 10px) */
}

.year-content {
    padding: 0;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.year-header::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 3px;
    bottom: 0;
    left: 0;
    background: linear-gradient(to right, transparent, var(--aqua-accent), transparent);
    transform: translateX(-100%);
    transition: transform 0.5s ease;
}

.year-item:hover .year-header::after {
    transform: translateX(0);
}

.year-content {
    padding: 0;
    /* 패딩 제거 (year-item의 padding으로 충분) */
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    /* gap 감소 (18px → 10px) */
}

.question-count {
    font-size: 0.95rem;
    color: var(--deep-sea-gray);
    margin-bottom: 5px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

.start-button {
    display: none;
    /* 카드 전체 클릭으로 통일하므로 숨김 처리 */
}

/* 컨텐츠 소개 섹션 */
.subject-intro {
    background-color: var(--frost-white);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 40px;
    box-shadow: 0 2px 8px rgba(29, 47, 78, 0.08);
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(29, 47, 78, 0.08);
}

.subject-intro:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(29, 47, 78, 0.12);
}

.subject-intro h2 {
    color: var(--penguin-navy);
    margin-bottom: 15px;
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.4;
}

.subject-description {
    color: var(--deep-sea-gray);
    line-height: 1.8;
    font-size: 1rem;
    margin-bottom: 12px;
}

.source-note {
    display: block;
    color: var(--deep-sea-gray);
    font-size: 0.875rem;
    opacity: 0.8;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid rgba(29, 47, 78, 0.1);
}

/* 연도별 배지 */
.year-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background-color: var(--aqua-accent);
    color: var(--frost-white);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: 700;
    box-shadow: 0 3px 8px rgba(95, 178, 201, 0.3);
    transition: transform 0.3s ease;
}

.year-item:hover .year-badge {
    transform: rotate(10deg) scale(1.1);
}

/* 문제 개수에 따른 배지 */
.difficulty-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 10px;
    font-weight: 600;
    background-color: rgba(255, 255, 255, 0.2);
}

/* 애니메이션 효과 */
@keyframes softFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.years-list {
    animation: softFadeIn 0.8s ease-out;
}

/* 반응형 스타일 */
@media (max-width: 768px) {
    .years-list {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 20px;
    }

    .page-title h1 {
        font-size: 1.5rem;
    }

    .subject-intro {
        padding: 20px;
    }

    .subject-intro h2 {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .years-list {
        grid-template-columns: 1fr;
    }

    .header-content {
        flex-direction: column;
        gap: 15px;
    }

    .back-link {
        align-self: flex-start;
    }

    .year-content {
        padding: 20px 15px;
    }
}


/* 모의고사 섹션 스타일 */
.mock-exam-section,
.subject-section {
    margin-bottom: 40px;
}

.section-title {
    font-size: 1.5rem;
    color: var(--penguin-navy);
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(29, 47, 78, 0.1);
    position: relative;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background-color: var(--aqua-accent);
}

/* 특별 항목 스타일 - 모의고사용 */
.special-item {
    border: 1px solid rgba(95, 178, 201, 0.3);
    background: white;
}

.special-item .year-header {
    color: var(--aqua-accent);
}

.special-item:hover {
    border-color: var(--aqua-accent);
    box-shadow: 0 12px 32px rgba(95, 178, 201, 0.2);
}

.special-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(95, 178, 201, 0.25);
}

.special-item .start-button {
    background-color: var(--penguin-navy);
    box-shadow: 0 4px 12px rgba(29, 47, 78, 0.2);
}

.special-item .start-button:hover {
    background-color: #2a4366;
    box-shadow: 0 6px 18px rgba(29, 47, 78, 0.3);
}

.special-item .question-count {
    color: var(--aqua-accent);
    font-weight: 600;
}

/* 문제 개수가 많은 경우 강조 표시 */
.question-count:has(+ .start-button[href*="모의고사"]) {
    font-weight: 700;
    color: var(--penguin-navy);
}

@media (max-width: 768px) {
    .section-title {
        font-size: 1.2rem;
    }
}