/* 페이지 헤더 */
.page-header {
    background: linear-gradient(135deg, #002147, #003366);
    color: white;
    padding: 120px 0 80px;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.breadcrumb-custom {
    background: transparent;
    padding: 0;
    margin: 0;
}

.breadcrumb-custom .breadcrumb-item a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
}

.breadcrumb-custom .breadcrumb-item.active {
    color: #66ccff;
}

/* 타임라인 컨테이너 */
.timeline-container {
    padding: 4rem 0;
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background: linear-gradient(to bottom, #0066cc, #66ccff);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
    border-radius: 2px;
}

/* 타임라인 아이템 */
.timeline-item {
    padding: 2rem 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
    animation: fadeInUp 0.6s ease-out;
}

.timeline-item.left {
    left: 0;
    text-align: right;
}

.timeline-item.right {
    left: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background: white;
    border: 4px solid #0066cc;
    top: 50%;
    border-radius: 50%;
    z-index: 1;
    transform: translateY(-50%);
}

.timeline-item.right::after {
    left: -10px;
}

.timeline-item::before {
    content: '';
    height: 0;
    position: absolute;
    top: 50%;
    width: 0;
    z-index: 1;
    right: 30px;
    border: medium solid #0066cc;
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent #0066cc;
    transform: translateY(-50%);
}

.timeline-item.right::before {
    left: 30px;
    border: medium solid #0066cc;
    border-width: 10px 10px 10px 0;
    border-color: transparent #0066cc transparent transparent;
}

/* 타임라인 콘텐츠 */
.timeline-content {
    padding: 2rem;
    background: white;
    position: relative;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-year {
    background: linear-gradient(135deg, #0066cc, #004499);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    display: inline-block;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.timeline-achievements {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}

.timeline-achievements li {
    padding: 0.7rem 0;
    display: flex;
    align-items: flex-start;
    border-bottom: 1px solid #f0f0f0;
    color: #333;
}

.timeline-achievements li:last-child {
    border-bottom: none;
}

.timeline-achievements li::before {
    content: '✓';
    color: #0066cc;
    font-weight: bold;
    margin-right: 0.8rem;
    margin-top: 0.1rem;
    flex-shrink: 0;
}

.achievement-highlight {
    background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
    border-left: 4px solid #0066cc;
    padding: 1rem;
    border-radius: 0 10px 10px 0;
    margin: 1rem 0;
}

.achievement-highlight .highlight-title {
    font-weight: 700;
    color: #0066cc;
    margin-bottom: 0.5rem;
}

/* 통계 섹션 */
.stats-section {
    background: linear-gradient(135deg, #002147, #003366);
    color: white;
    padding: 4rem 0;
    margin: 4rem 0;
    border-radius: 30px;
}

.stat-item {
    text-align: center;
    padding: 2rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: #66ccff;
    display: block;
}

.stat-label {
    font-size: 1.1rem;
    margin-top: 0.5rem;
    opacity: 0.9;
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #66ccff;
}

/* 반응형 - 모바일 */
@media screen and (max-width: 768px) {
    .page-header h1 {
        font-size: 2.2rem;
    }

    .timeline::after {
        left: 31px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
        text-align: left !important;
    }

    .timeline-item.left {
        left: 0%;
    }

    .timeline-item.right {
        left: 0%;
    }

    .timeline-item::before {
        left: 60px;
        border: medium solid #0066cc;
        border-width: 10px 10px 10px 0;
        border-color: transparent #0066cc transparent transparent;
    }

    .timeline-item::after {
        left: 21px;
    }

    .timeline-content {
        padding: 1.5rem;
    }

    .stat-number {
        font-size: 2.2rem;
    }

    .stat-item {
        padding: 1rem;
    }
}

/* 애니메이션 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 섹션 제목 */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #002147;
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: #6c757d;
    font-size: 1.2rem;
    margin-bottom: 3rem;
}