/* yooji素材屋 共通ヘッダー */
.theme-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.35rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.25s ease;
    user-select: none;
    margin-left: 0.75rem;
}

html[data-theme="light"] .theme-toggle-btn {
    background: rgba(15, 23, 42, 0.06);
}

.theme-toggle-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: 0 2px 10px var(--accent-glow);
}

.header-logo {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 0.5px;
    padding: 0;
    border: none;
    box-shadow: none;
    transform: none;
    display: flex;
    align-items: center;
}

.header-logo a {
    color: #ffffff;
    text-decoration: none;
    text-shadow: 0 0 10px rgba(0, 176, 255, 0.8);
    display: flex;
    align-items: center;
    height: 48px;
    width: 100%;
}

.header-logo img {
    max-height: 48px;
    max-width: 100%;
    width: auto;
    object-fit: contain;
    display: block;
}

.top-full-banner {
    width: 100%;
    background-color: var(--bg-color);
    overflow: hidden;
    text-align: center;
}

.top-full-banner img {
    width: 100%;
    height: 80px;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: opacity 0.3s ease;
}

.top-full-banner a:hover img {
    opacity: 0.92;
}

header nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    margin: 0 auto;
    justify-content: center;
}

header nav a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 700;
    transition: all 0.25s ease;
}

header nav a:hover {
    color: var(--accent-color);
    text-shadow: 0 0 10px rgba(0, 176, 255, 0.4);
    background: none;
    transform: none;
    box-shadow: none;
}

header nav a.active {
    color: var(--accent-color);
    background: none;
}

@media (max-width: 768px) {
    .mobile-menu-bar {
        display: flex !important;
    }

    header {
        padding: 0;
    }

    header nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(15px);
        -webkit-backdrop-filter: blur(15px);
        border-bottom: 1px solid var(--border-color);
        padding: 1.5rem 0;
        gap: 1.25rem;
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
        z-index: 999;
    }

    header nav.menu-open {
        display: flex;
    }

    header nav a {
        font-size: 1rem;
        width: 100%;
        text-align: center;
        padding: 0.5rem 0;
    }
}