/* ヘッダー・ナビゲーション用CSS */
header {
    background: linear-gradient(135deg, #502200 80%, #C09933 100%);
    color: var(--color-sub2);
    text-align: center;
    padding: 3.5rem 1rem 2.5rem 1rem;
    position: relative;
    box-shadow: 0 4px 24px var(--color-shadow);
}
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
    margin-bottom: 1.5rem;
}
.hero-img {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--color-sub);
    box-shadow: 0 2px 12px var(--color-shadow);
    background: #fff;
}
header h1 {
    font-size: 2.8rem;
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
    font-weight: 700;
}
header p {
    font-size: 1.15rem;
    opacity: 0.92;
}
nav {
    margin-top: 1.2rem;
}
.nav-list {
    display: flex;
    justify-content: center;
    gap: 2.2rem;
    list-style: none;
}
.nav-list a {
    color: var(--color-sub2);
    font-weight: 600;
    font-size: 1.1rem;
    transition: color 0.2s;
}
.nav-list a:hover {
    color: var(--color-sub);
}
@media (max-width: 700px) {
    header h1 {
        font-size: 2rem;
    }
    .hero-img {
        width: 70px;
        height: 70px;
    }
}