/* 기본 스타일 초기화 */
body {
    font-family: 'Malgun Gothic', 'Apple SD Gothic Neo', sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f4f7f6;
    color: #333;
}

#dashboard-container {
    max-width: 1000px;
    margin: 0 auto;
    background-color: #fff;
    padding: 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-radius: 12px;
}

/* 헤더 스타일 */
#main-header {
    text-align: center;
    border-bottom: 3px solid #0056b3;
    padding-bottom: 15px;
    margin-bottom: 30px;
}

#main-header h1 {
    font-size: 2.5em;
    color: #0056b3;
    margin-bottom: 5px;
}

.subtitle {
    color: #666;
    font-size: 1.1em;
}

/* 주요 정보 카드 스타일 */
.info-card {
    background-color: #e6f2ff;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
    border-left: 5px solid #007bff;
}

.info-card h2 {
    color: #007bff;
    margin-top: 0;
    font-size: 1.5em;
    border-bottom: 1px dashed #a0c3e1;
    padding-bottom: 10px;
    margin-bottom: 15px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.title-item {
    background-color: #fff;
    padding: 10px 15px;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.title-item strong {
    color: #34495e;
    font-weight: 600;
}

/* 연대기 섹션 스타일 */
#timeline-section h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.8em;
}

#timeline-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.timeline-card {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.timeline-card.expanded {
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    border-color: #007bff;
}

.card-header {
    padding: 15px 20px;
    background-color: #ecf0f1;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.timeline-card.expanded .card-header {
    background-color: #007bff;
    color: white;
}

.card-header h3 {
    margin: 0;
    font-size: 1.2em;
}

.card-period {
    font-weight: 600;
    color: #666;
}

.timeline-card.expanded .card-period {
    color: #ffffff;
}

.toggle-icon {
    font-size: 1.2em;
    margin-left: 10px;
    transition: transform 0.3s;
}

/* 상세 내용 스타일 */
.card-details {
    padding: 0 20px;
    max-height: 500px;
    /* 초기에는 숨겨져야 하므로 큰 값 설정 */
    transition: all 0.5s ease-out;
}

.card-details.hidden {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    overflow: hidden;
}

.card-details ul {
    list-style: none;
    padding: 15px 0;
    margin: 0;
    border-top: 1px solid #eee;
}

.card-details li {
    padding: 8px 0;
    border-bottom: 1px dotted #e1e1e1;
    line-height: 1.4;
}

.card-details li:last-child {
    border-bottom: none;
}

.card-details strong {
    color: #555;
    min-width: 80px;
    display: inline-block;
}

.source {
    font-size: 0.8em;
    color: #999;
    margin-left: 5px;
}