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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* 顶部工具栏 */
.top-bar {
    background: #fff;
    border-bottom: 1px solid #e0e0e0;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.top-bar h1 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
}

.top-bar-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

.top-bar-controls label {
    font-size: 14px;
}

.top-bar-controls select {
    padding: 6px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    background: white;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* メインコンテンツ */
.main-content {
    display: flex;
    gap: 20px;
}

/* 左パネル */
.left-panel {
    width: 45%;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* 右パネル */
.right-panel {
    width: 55%;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* セクション共通 */
section {
    background: #fff;
    border-radius: 8px;
    padding: 16px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* セクションタイトル */
.section-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.input-title {
    color: #2563eb;
}

.output-title {
    color: #2563eb;
    margin-bottom: 0;
}

.preview-title {
    color: #2563eb;
}

.settings-title {
    color: #dc2626;
}

/* 出力ヘッダー */
.output-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

/* テキストエリア */
textarea {
    width: 100%;
    height: 150px;
    min-height: 100px;
    padding: 12px;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 13px;
    resize: vertical;
    background-color: #fafafa;
}

textarea:focus {
    outline: none;
    border-color: #2563eb;
}

#output-katex {
    background-color: #f8f8f8;
    color: #333;
}

/* チェックボックス */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: #2563eb;
}

/* コピーボタン */
.btn-copy {
    padding: 6px 16px;
    border: none;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    background-color: #3b82f6;
    color: white;
}

.btn-copy:hover {
    background-color: #2563eb;
}

.btn-copy:active {
    transform: scale(0.98);
}

/* プレビューセクション */
.preview-section {
    flex: 1;
    min-height: 200px;
}

#preview-container {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    padding: 16px;
    overflow: auto;
    min-height: 180px;
    max-height: 400px;
}

#preview-content {
    display: flex;
    justify-content: flex-start;
    overflow-x: auto;
}

/* 書式設定セクション */
.settings-section {
    padding: 16px;
}

.settings-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.settings-row {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.settings-row label {
    font-size: 13px;
}

.settings-row select {
    padding: 4px 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 13px;
    background: white;
}

.settings-row input[type="range"] {
    flex: 1;
    min-width: 100px;
    accent-color: #3b82f6;
}

#spacing-value {
    font-size: 13px;
    min-width: 40px;
}

/* 行間スペース行 */
.spacing-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.spacing-row input[type="range"] {
    flex: 1;
    min-width: 150px;
    max-width: 300px;
}

/* 列配置設定 */
.alignment-row {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    flex-wrap: wrap;
    padding-top: 8px;
    border-top: 1px solid #eee;
}

#column-alignments {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.align-control {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.align-control label {
    font-size: 12px;
    color: #666;
}

.align-control select {
    padding: 4px 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 12px;
    background: white;
    min-width: 70px;
}

/* フッター */
footer {
    text-align: center;
    padding: 20px;
    color: #666;
    font-size: 14px;
}

/* レスポンシブ対応 */
@media (max-width: 900px) {
    .top-bar {
        flex-direction: column;
        align-items: flex-start;
    }

    .main-content {
        flex-direction: column;
    }

    .left-panel,
    .right-panel {
        width: 100%;
    }
}

/* コピー成功時のトースト通知 */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #333;
    color: white;
    padding: 12px 24px;
    border-radius: 6px;
    font-size: 14px;
    z-index: 1000;
    animation: fadeInOut 2s ease-in-out;
}

@keyframes fadeInOut {
    0% { opacity: 0; transform: translateX(-50%) translateY(20px); }
    15% { opacity: 1; transform: translateX(-50%) translateY(0); }
    85% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(-20px); }
}