.left-column h2 {
    background-color: #e74c3c;
    color: #fff;
    padding: 10px;
    border-radius: 8px;
    font-size: 18px;
    margin-bottom: 10px;
    text-align: center;
}

main section {
    margin-bottom: 20px;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

main section h2 {
    border-bottom: 2px solid #2c3e50;
    padding-bottom: 5px;
    margin-bottom: 15px;
    font-size: 22px;
    color: #2c3e50;
}

#security-academy {
    margin-top: 20px;
    margin-bottom: 20px;
    text-align: center;
    z-index: 0;
}


security-news {
    margin-bottom: 20px;
    z-index: 0;
}

#security-news .news-item-full {
    border: 1px solid #ccc;
    border-radius: 8px;
    padding: 15px;
    background: #f1f1ec;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

#security-news .news-item-full a {
    font-size: 18px;
    color: #333;
    text-decoration: none;
}

#security-news .news-item-full span {
    display: block;
    color: #666;
    font-size: 14px;
    margin-top: 5px;
}

#security-news .news-item-full:hover {
    transform: scale(1.02);
}

#security-news .news-item-full_warn {
    border: 1px solid black;
    border-radius: 8px;
    padding: 16px;
    background: yellow;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}
#security-news .news-item-full_warn a {
    font-size: 22px;
    color: #333;
    text-decoration: none;
}

#security-news .news-item-full_warn span {
    display: block;
    color: #666;
    font-size: 14px;
    margin-top: 5px;
}

#security-news .news-item-full_warn:hover {
    transform: scale(1.02);
}

#tile-links,
#news {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: space-between;
}

.tile-container,
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.tile,
.news-item {
    width: 100%;
    height: 150px;
    max-width: 250px;
    padding: 10px;
    box-sizing: border-box;
}

.tile img,
.news-item a {
    width: 100%;
    height: 100%;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 10px;
    box-sizing: border-box;
    color: #333;
}

.tile img:hover,
.news-item a:hover {
    transform: scale(1.05);
}

.news-item span {
    color: #666;
    font-size: 14px;
    margin-top: 5px;
    display: block;
}

.new-badge {
    color: red;
    font-weight: bold;
    margin-right: 5px;
}

#intro {
    background: linear-gradient(45deg, #ffcc33, #fc87ae);
    color: #fff;
    padding: 20px;
    border-radius: 32px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    z-index: 10;
}

#intro h2 {
    font-size: 32px;
    margin-bottom: 10px;
}

.goal {
    font-size: 20px;
    font-weight: bold;
}

#announcement {
    background-color: #4caf50;
    color: white;
    text-align: center;
    padding: 15px;
    font-size: 16px;
    width: 100%;
}

.details-button {
    background-color: #ffffff;
    color: #4caf50;
    border: 1px solid #ffffff;
    border-radius: 5px;
    padding: 5px 10px;
    margin-left: 20px;
    text-decoration: none;
    font-weight: bold;
}

.details-button:hover {
    background-color: #f1f1f1;
    border-color: #f1f1f1;
}

.warning {
    background-color: #ffdddd;
    border-left: 6px solid #f44336;
    padding: 10px;
    margin-bottom: 20px;
}

/* 年度目標めだたせたい */
:root {
    --header-h:64px;
    --announcement-h:0px;
    --goal-accent:#1e88e5;
    --surface: #ffffff;
    --text-color: #1a1a1a;
    --border-color: rgba(0,0,0,.08);
    --shadow: 0 8px 24px rgba(0,0,0,.10);
    --intro-gap: 8px;
}
#intro{
    /* position: sticky; */
    top:calc(var(--header-h) + var(--announcement-h) + 8px);
    margin:8px auto;
    padding:clamp(8px,2.5vw,12px);
    max-width:1100px;
    border-radius:16px;
    background:var(--surface);
    color:var(--text-color);
    box-shadow:var(--shadow); 
    border:1px solid var(--border-color); 
    scroll-margin-top:calc(var(--header-h) + var(--announcement-h) + var(--intro-gap));
    border: 0;
    box-shadow: 0 0 0 8px #000, 0 8px 24px rgba(0,0,0,.10);
}
#intro .goal{
    display:inline-block;
    margin:0;
    padding:6px 8px;
    border-radius:999px;
    background:var(--goal-accent);
    color:#fff;
    font-weight:600;
    letter-spacing:.02em;
    font-size:clamp(12px,1.6vw,24px);
    white-space:nowrap;
}
#intro h2{
    margin:8px 0 0;
    font-size:clamp(20px,3.4vw,32px);
    line-height:1.25;
    font-weight:800;
}
#intro h2::after{
    content:"";
    display:block;
    width:clamp(120px,30%,220px);
    height:4px;
    margin-top:10px;
    border-radius:4px;
}