:root{
    --main:#ff6fb7;
    --sub:#7ad7ff;
    --dark:#1e1e2f;
    --light:#f9f9ff;
}

*{box-sizing:border-box;}

body{
    margin:0;
    font-family: "Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;
    background:linear-gradient(180deg,var(--light),#fff);
    color:#333;
}

header{
    background:linear-gradient(135deg,var(--main),var(--sub));
    color:white;
    padding:60px 20px;
    text-align:center;
}

header h1{
    font-size:2.6rem;
    margin:0 0 10px;
}

header p{
    opacity:0.95;
}

a {
    color: #9ca3af;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* ===== レイアウト ===== */
.layout{
    display:flex;
    min-height:100vh;
}

/* ===== メイン ===== */
.content{
    flex:1;
    display:flex;
    flex-direction:column;
}

/* ===== サイドバー ===== */
.sidebar{
    width:260px;
    background:#fafaff;
    border-right:1px solid #222;
    padding:24px 16px;
}

.sidebar-title{
    font-size:1.2rem;
    margin-bottom:16px;
    color:var(--sub);
}

.sidebar-menu{
    list-style:none;
    padding:0;
    margin:0;
}

.sidebar-menu li{
    margin-bottom:10px;
}

.sidebar-menu a{
    display:block;
    padding:12px 14px;
    border-radius:10px;
    text-decoration:none;
    color:var(--text);
    background:rgba(255,255,255,0.03);
    transition:all .25s;
}

.sidebar-menu a:hover{
    background:var(--card);
    transform:translateX(4px);
}
.menu-name{
    display:block;
    font-weight:600;
}

.menu-desc{
    display:block;
    font-size:.75rem;
    color:var(--muted);
}

section{
    max-width:1100px;
    margin:60px auto;
    padding:0 20px;
}

.section-box{
    background:white;
    border-radius:6px;
    padding:30px;
    box-shadow:0 10px 30px rgba(0,0,0,0.08);
    margin-bottom:40px;
}

.section-box h2{
    margin-top:0;
    color:#374151;
}

.lab-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
    gap:20px;
}

.lab-card{
    background:#fafaff;
    border-radius:14px;
    padding:20px;
    border:1px solid #eee;
    transition:transform .3s, box-shadow .3s;
}

.lab-card:hover{
    transform:translateY(-6px);
    box-shadow:0 12px 24px rgba(0,0,0,0.12);
}

.lab-card h3{
    margin-top:0;
    color:#444;
}

.links{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
}

.links a{
    text-decoration:none;
    padding:10px 16px;
    border-radius:6px;
    background:#fafaff;
    color:#374151;
    font-size:0.9rem;
}

.links a:hover{
    background:var(--main);
}

footer{
    background:#111;
    color:#aaa;
    text-align:center;
    padding:30px 10px;
    font-size:0.85rem;
}

/* ===== レスポンシブ ===== */
@media (max-width:900px){
    .layout{
        flex-direction:column;
    }
    .sidebar{
        width:100%;
        border-right:none;
        border-bottom:1px solid #222;
    }
}