.tool-container {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    border: 1px solid #eee;
}

/* タブデザイン */
.tab-menu {
    display: flex;
    border-bottom: 2px solid #eee;
    margin-bottom: 25px;
    gap: 10px;
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 1rem;
    color: #666;
    border-bottom: 3px solid transparent;
}

.tab-btn.active {
    color: #333f47;
    border-bottom-color: #333f47;
    font-weight: bold;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* 検索エリア */
.search-area {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
}

.main-input {
    flex-grow: 1;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: monospace;
}

/* 情報リスト */
.info-list { display: flex; flex-direction: column; gap: 15px; }
.info-item { padding: 15px; background: #f9f9f9; border-radius: 6px; border: 1px solid #eee; }
.info-item.highlight { background: #fff8e1; border-color: #ffe082; }
.info-item .label { display: block; font-size: 0.8rem; color: #777; margin-bottom: 5px; }
.info-item .value { font-size: 1.2rem; font-family: monospace; color: #333f47; }
.info-item .value.small { font-size: 1rem; }

.value-group { display: flex; justify-content: space-between; align-items: center; }
.copy-btn { padding: 4px 10px; font-size: 0.75rem; cursor: pointer; background: #eee; border: 1px solid #ddd; border-radius: 3px; }

.btn-main { background: #333f47; color: white; border: none; padding: 10px 20px; border-radius: 4px; cursor: pointer; font-weight: bold; }
.loading-text { color: #999; font-style: italic; }
.error-msg { color: #e74c3c; margin-top: 10px; font-weight: bold; }