* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans JP", sans-serif;
    line-height: 1.6;
    color: #f0f0f0;
    margin: 0 auto;
    padding: 0;
    background: #1a1a1a;
}

/* 子要素にpadding適用（bodyではなく） */
body > img,
body > h1,
body > h3,
body > p,
body > ul,
body > hr,
body > div {
    padding-left: 20px;
    padding-right: 20px;
}

.header-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    margin-bottom: 20px;
    display: block;
    padding: 0 !important;
}

h1 {
    color: #f0f0f0;
    font-size: 24px;
    margin-bottom: 20px;
    border-bottom: 2px solid #ffb3d9;
    padding-bottom: 10px;
}

h3 {
    color: #ffb3d9;
    font-size: 18px;
    margin-top: 30px;
    margin-bottom: 15px;
}

hr {
    border: none;
    border-top: 1px solid #444;
    margin: 25px 0;
}

ul {
    padding-left: 20px;
}

li {
    margin-bottom: 8px;
}

.highlight-red {
    color: #ff6ec7;
    font-weight: bold;
}

a {
    color: #ffb3d9;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
    color: #ff6ec7;
}

strong {
    color: #ffb3d9;
}

.footer-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    margin-top: 20px;
    display: block;
    padding: 0 !important;
}

.language-switcher {
    text-align: center;
    margin-top: 30px;
    padding: 15px 0;
    border-top: 1px solid #444;
    position: relative;
}

.language-switcher ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    flex-wrap: nowrap;
    gap: 6px;
}

.language-switcher li {
    margin: 0;
}

.language-switcher a {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px 8px;
    border-radius: 8px;
    background: #2a2a2a;
    border: 1px solid #444;
    color: #f0f0f0;
    font-size: 12px;
    transition: all 0.3s ease;
    min-height: 36px;
    white-space: nowrap;
}

.language-switcher a:hover {
    background: #ffb3d9;
    color: #1a1a1a;
    border-color: #ffb3d9;
    text-decoration: none;
}

.language-switcher a.current {
    background: #ffb3d9;
    color: #1a1a1a;
    border-color: #ffb3d9;
}

/* スマホ最適化 */
@media (max-width: 768px) {
    body > img,
    body > h1,
    body > h3,
    body > p,
    body > ul,
    body > hr,
    body > div {
        padding-left: 15px;
        padding-right: 15px;
    }

    * {
        max-width: 100%;
    }

    img, .header-image, .footer-image {
        max-width: 100%;
        height: auto;
    }

    h1 {
        font-size: 20px;
    }

    h3 {
        font-size: 16px;
    }

    /* ドロップダウン表示 */
    .language-switcher ul {
        display: none;
    }

    .language-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 20px;
        background: #2a2a2a;
        border: 1px solid #444;
        border-radius: 8px;
        cursor: pointer;
        min-height: 44px;
        font-size: 16px;
        color: #f0f0f0;
        transition: all 0.3s ease;
    }

    .language-toggle:hover {
        background: #3a3a3a;
        border-color: #ffb3d9;
    }

    .language-toggle:active {
        background: #ffb3d9;
        color: #1a1a1a;
    }

    .language-toggle .arrow {
        transition: transform 0.3s ease;
    }

    .language-toggle.active .arrow {
        transform: rotate(180deg);
    }

    .language-dropdown {
        display: none;
        position: absolute;
        left: 0;
        right: 0;
        margin: 10px 15px 0;
        background: #2a2a2a;
        border: 1px solid #444;
        border-radius: 8px;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        z-index: 100;
    }

    .language-dropdown.active {
        display: block;
        max-height: 400px;
        overflow-y: auto;
    }

    .language-dropdown a {
        display: block;
        padding: 12px 20px;
        border-radius: 0;
        border: none;
        border-bottom: 1px solid #333;
        min-height: 44px;
        font-size: 16px;
    }

    .language-dropdown a:last-child {
        border-bottom: none;
    }

    .language-dropdown a:hover {
        background: #3a3a3a;
    }

    .language-dropdown a.current {
        background: #ffb3d9;
        color: #1a1a1a;
    }
}

/* PC・タブレット（768px以上）では通常表示 */
@media (min-width: 769px) {
    body {
        max-width: 840px; /* 800px + padding 40px */
    }

    body > img,
    body > h1,
    body > h3,
    body > p,
    body > ul,
    body > hr,
    body > div {
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }

    .language-toggle {
        display: none;
    }

    .language-dropdown {
        display: none;
    }
}