body {
    background-color: #efefef;
    color: #000;
    font-family: "MS PGothic", "Mona", "IPAMonaPGothic", sans-serif;
    line-height: 1.4;
    margin: 0;
    padding: 20px;
}

.header-controls {
    position: sticky;
    top: 0;
    background: #ddd;
    padding: 10px;
    border: 1px solid #aaa;
    margin-bottom: 20px;
    display: flex;
    gap: 10px;
    align-items: center;
    z-index: 100;
}

.btn-toggle {
    padding: 2px 10px;
    cursor: pointer;
    font-size: 0.8em;
    background: #f0f0f0;
    border: 1px solid #999;
}

.btn-toggle.active {
    background: #ccc;
    font-weight: bold;
}

.thread-container {
    max-width: 900px;
    margin: 0 auto;
    border-bottom: 2px solid #ccc;
    padding-bottom: 20px;
}

.thread-title {
    color: #ff0000;
    font-size: 1.5em;
    font-weight: bold;
    margin-bottom: 20px;
}

.post {
    margin-bottom: 25px;
    padding: 5px;
}

.post-header {
    font-weight: bold;
    color: #222;
}

.post-content {
    margin-top: 5px;
    margin-left: 20px;
    font-size: 16px;
    white-space: pre-wrap;
}

.translation-block {
    display: block;
    margin-top: 5px;
    padding: 8px;
    background-color: #f4f4f4;
    border-left: 3px solid #ccc;
    font-style: italic;
    color: #666;
    font-size: 0.9em;
    font-family: sans-serif;
}

/* 言語制御モード */
body.mode-ja .translation-block { display: none; }
body.mode-de .lang-ja { display: none; }

.anchor { color: #0000ff; text-decoration: none; }
.hasumi { color: #00008b; }
.tripcode { color: #008000; }

.footer-form {
    background-color: #ddd;
    padding: 15px;
    margin-top: 30px;
    border: 1px solid #aaa;
}