/* 作業ルール準拠：ASCII アート変換ツール（読みやすさ・シンプルデザイン重視） */

/* 基本スタイル */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #ffffff;
    color: #000000;
    line-height: 1.8;
    font-size: 16px;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 30px;
}

h1, h2, h3, h4 {
    color: #000000;
    font-weight: bold;
    margin: 30px 0 15px 0;
}

h1 {
    font-size: 2.2em;
    margin-bottom: 20px;
    border-bottom: 3px solid #000000;
    padding-bottom: 10px;
    text-align: center;
}

h2 {
    font-size: 1.6em;
    margin: 40px 0 20px 0;
    border-bottom: 2px solid #000000;
    padding-bottom: 8px;
}

h3 {
    font-size: 1.4em;
    margin: 25px 0 15px 0;
    border-bottom: 1px solid #666666;
    padding-bottom: 5px;
}

h4 {
    font-size: 1.2em;
    margin: 20px 0 10px 0;
}

p, li {
    margin: 10px 0;
    line-height: 1.8;
}

/* パンくずリスト */
.breadcrumb {
    list-style: none;
    padding: 0;
    margin: 0 0 30px 0;
    font-size: 0.9em;
    border-bottom: 1px solid #cccccc;
    padding-bottom: 15px;
}

.breadcrumb li {
    display: inline;
}

.breadcrumb li:not(:last-child):after {
    content: " > ";
    color: #666666;
    margin: 0 8px;
}

.breadcrumb a {
    color: #000000;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* ツールコンテナ */
.tool-container {
    max-width: 900px;
    margin: 0 auto;
    background-color: #ffffff;
    border: 2px solid #000000;
    padding: 30px;
}

/* 1. ASCII アートとは何かの説明セクション */
.what-is-ascii {
    background-color: #f9f9f9;
    border: 2px solid #666666;
    padding: 25px;
    margin-bottom: 30px;
}

.example-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 20px 0;
    flex-wrap: wrap;
}

.example-before, .example-after {
    flex: 1;
    min-width: 200px;
    text-align: center;
}

.arrow {
    font-size: 2em;
    font-weight: bold;
    margin: 0 20px;
    color: #000000;
}

.example-image {
    border: 2px solid #000000;
    padding: 15px;
    margin: 10px;
    background-color: #ffffff;
}

.example-ascii {
    border: 2px solid #000000;
    padding: 15px;
    margin: 10px;
    background-color: #000000;
    color: #ffffff;
    font-family: Consolas, 'MS Gothic', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.0;
    letter-spacing: 0px;
    font-weight: bold;
    transform: scaleY(0.85);
    transform-origin: top;
}

.example-ascii pre {
    margin: 0;
    padding: 0;
    color: #ffffff;
    background-color: transparent;
    font-family: Consolas, 'MS Gothic', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.0;
    letter-spacing: 0px;
    font-weight: bold;
}

.use-cases {
    margin-top: 20px;
    background-color: #ffffff;
    border: 1px solid #cccccc;
    padding: 15px;
}

.use-cases ul {
    margin: 10px 0;
    padding-left: 25px;
}

.use-cases li {
    margin-bottom: 8px;
}

/* 2. ファイル形式情報 */
.file-info {
    background-color: #f5f5f5;
    border: 2px solid #cccccc;
    padding: 20px;
    margin-bottom: 30px;
}

/* 3. メインアクション（画像選択）を目立たせる */
.main-action {
    background-color: #fffacd;
    border: 3px solid #000000;
    padding: 30px;
    margin: 30px 0;
    text-align: center;
}

.file-input-container {
    position: relative;
    margin: 20px auto;
    max-width: 400px;
}

.file-input-label {
    display: block;
    padding: 15px 25px;
    background-color: #000000;
    color: #ffffff;
    cursor: pointer;
    font-weight: bold;
    text-align: center;
    border: 2px solid #000000;
    font-size: 18px;
}

.main-button {
    font-size: 18px !important;
    padding: 15px 30px !important;
}

.file-input-label:hover {
    background-color: #333333;
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.filename {
    font-weight: bold;
    color: #000000;
    margin-top: 15px;
}

/* 4. 処理コントロール */
.processing-controls {
    background-color: #f0f8ff;
    border: 2px solid #0066cc;
    padding: 25px;
    margin: 30px 0;
    text-align: center;
}

.setting-group {
    margin: 20px 0;
    padding: 20px;
    border: 1px solid #cccccc;
    background-color: #ffffff;
    text-align: left;
}

.setting-group label {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 15px;
    display: block;
}

input[type="range"] {
    width: 80%;
    max-width: 400px;
    height: 8px;
    margin: 15px 0;
}

select {
    width: 100%;
    max-width: 300px;
    padding: 8px 12px;
    font-size: 16px;
    border: 2px solid #000000;
    background-color: #ffffff;
    color: #000000;
}

.slider-help {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: #666666;
    margin-top: 5px;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* 5. 画像表示・ASCII出力コンテナ */
.images-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    margin: 40px 0;
    padding: 20px;
    border: 2px solid #cccccc;
    background-color: #fafafa;
}

.image-box, .ascii-box {
    border: 2px solid #000000;
    padding: 20px;
    background-color: #ffffff;
    width: 320px;
    text-align: center;
}

.image-box h3, .ascii-box h3 {
    margin-top: 0;
    font-size: 1.2em;
    border-bottom: 1px solid #cccccc;
    padding-bottom: 8px;
}

canvas {
    max-width: 100%;
    height: auto;
    border: 1px solid #cccccc;
}

/* ASCII 出力エリア */
.ascii-output {
    width: 100%;
    height: 300px;
    font-family: Consolas, 'MS Gothic', 'Courier New', monospace;
    font-size: 10px;
    line-height: 1.0;
    letter-spacing: 0px;
    border: 2px solid #000000;
    padding: 10px;
    background-color: #000000;
    color: #ffffff;
    resize: both;
    white-space: pre;
    overflow: auto;
    transform: scaleY(0.85);
    transform-origin: top;
}

.ascii-output::placeholder {
    color: #cccccc;
    font-style: italic;
}

/* 6. 出力オプション */
.output-options {
    background-color: #e6ffe6;
    border: 2px solid #009900;
    padding: 25px;
    margin: 30px 0;
    text-align: center;
}

.action-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin: 20px 0;
}

.copy-result {
    font-weight: bold;
    margin-top: 15px;
    color: #009900;
    min-height: 20px;
}

/* ボタン共通スタイル */
.btn {
    padding: 12px 20px;
    background-color: #000000;
    color: #ffffff;
    border: 2px solid #000000;
    cursor: pointer;
    font-weight: bold;
    margin: 15px;
    font-size: 16px;
}

.btn:hover {
    background-color: #333333;
}

.btn:disabled {
    background-color: #cccccc;
    color: #666666;
    cursor: not-allowed;
    border-color: #cccccc;
}

/* 7. 詳細説明 */
.detailed-explanation {
    background-color: #f5f5f5;
    border: 2px solid #cccccc;
    padding: 25px;
    margin-top: 40px;
}

.technical-details, .tips {
    padding: 20px;
    background-color: #ffffff;
    border: 1px solid #cccccc;
    margin-top: 15px;
}

.technical-details ul, .tips ul {
    margin: 15px 0;
    padding-left: 25px;
}

.technical-details li, .tips li {
    margin-bottom: 8px;
    line-height: 1.6;
}

/* フッター */
footer {
    margin-top: 50px;
    text-align: center;
    padding: 30px;
    border-top: 3px solid #000000;
    background-color: #fafafa;
}

.footer-links {
    margin-bottom: 15px;
}

.footer-links a {
    margin: 0 15px;
    color: #000000;
    text-decoration: none;
    font-weight: bold;
}

.footer-links a:hover {
    text-decoration: underline;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .container {
        padding: 20px;
    }
    
    .example-container {
        flex-direction: column;
    }
    
    .arrow {
        margin: 15px 0;
        transform: rotate(90deg);
    }
    
    .images-container {
        flex-direction: column;
        align-items: center;
    }
    
    .image-box, .ascii-box {
        width: 100%;
        max-width: 320px;
    }
    
    .action-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .tool-container,
    .main-action,
    .processing-controls,
    .output-options {
        padding: 20px;
    }
    
    h1 {
        font-size: 1.8em;
    }
    
    h2 {
        font-size: 1.4em;
    }
    
    .slider-help {
        flex-direction: column;
        text-align: center;
        gap: 5px;
    }
    
    .ascii-output {
        font-size: 8px;
        height: 250px;
    }
}