/* /projects/sec/style.css */

/* --- ページ専用ヘッダー --- */
.page-specific-header {
    background: #2c3e50; /* 濃い青系の背景色 */
    color: white;
    padding: 60px 20px;
    text-align: center;
}
.page-specific-header-content h1 {
    margin: 0;
    font-size: 36px;
}
.page-specific-header-content p {
    margin: 10px 0 0 0;
    font-size: 18px;
    opacity: 0.9;
}

/* --- 活動内容グリッド --- */
.activity-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
}
.activity-card {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 8px;
}
.activity-card h4 {
    margin-top: 0;
    font-size: 18px;
}
.activity-card p {
    margin-bottom: 0;
    line-height: 1.8;
    color: #555;
}

/* --- タイムライン --- */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}
.timeline::after { /* タイムラインの縦線 */
    content: '';
    position: absolute;
    width: 3px;
    background-color: #e9ecef;
    top: 0;
    bottom: 0;
    left: 15px;
    margin-left: -1.5px;
}
.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
}
.timeline-dot { /* タイムラインの丸 */
    content: '';
    position: absolute;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background-color: white;
    border: 4px solid #007bff;
    top: 24px;
    left: 15px;
    transform: translateX(-50%);
    z-index: 1;
}
.timeline-content {
    padding: 20px;
    background-color: white;
    border: 1px solid #e9ecef;
    border-radius: 8px;
}
.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    font-weight: bold;
}
.event-badge {
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 12px;
    color: white;
}
.event-badge.upcoming { background-color: #007bff; } /* 青 */
.event-badge.finished { background-color: #6c757d; } /* グレー */
.event-badge.planning { background-color: #ffc107; color: #333; } /* 黄色 */

.event-details {
    list-style: none;
    padding: 0;
    margin: 0;
    line-height: 1.8;
    font-size: 15px;
}

/* --- モバイル対応 --- */
@media (max-width: 768px) {
    .activity-grid {
        grid-template-columns: 1fr;
    }
    .timeline::after {
        left: 15px;
    }
    .timeline-item {
        padding-left: 40px;
        padding-right: 15px;
    }
    .timeline-dot {
        left: 15px;
    }
}