body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 20px;
    background-color: #f8f9fa;
    color: #343a40;
}

.container {
    max-width: 900px;
    margin: auto;
    background: #ffffff;
    padding: 35px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

h1, h2, h3 {
    color: #0056b3;
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 5px;
    margin-top: 30px;
}

h1 {
    text-align: center;
    color: #007bff; /* Bootstrap primary blue */
    margin-bottom: 30px;
    border-bottom: 2px solid #e9ecef;
    padding-bottom: 15px;
}

h2 {
    color: #28a745; /* Bootstrap success green */
    margin-top: 30px;
    margin-bottom: 15px;
}

h3 {
    color: #17a2b8; /* Bootstrap info cyan */
    margin-top: 20px;
    margin-bottom: 10px;
}

.tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.tab-button {
    padding: 10px 20px;
    margin: 0 5px;
    border: 1px solid #ddd;
    border-bottom: none;
    border-radius: 8px 8px 0 0;
    background-color: #e0e0e0;
    cursor: pointer;
    font-weight: bold;
    color: #555;
    transition: background-color 0.3s, color 0.3s;
}

    .tab-button.active {
        background-color: #007bff;
        color: white;
        border-color: #007bff;
    }

.tab-content {
    background-color: #fff;
    padding: 20px;
    border-radius: 0 8px 8px 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: none; /* 初期状態では非表示 */
}

    .tab-content.active {
        display: block; /* アクティブなタブのみ表示 */
    }

section {
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid #e9ecef;
}

    section:last-of-type {
        border-bottom: none;
    }

ul {
    list-style-type: disc;
    margin-left: 25px;
    margin-bottom: 15px;
}

ol {
    list-style-type: decimal;
    margin-left: 25px;
    margin-bottom: 15px;
}

code {
    background-color: #e0f2f7; /* Light blue background for inline code */
    padding: 2px 5px;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    color: #c7254e;
}

pre {
    background-color: #f0f8ff; /* AliceBlue for code blocks */
    padding: 18px;
    border-radius: 8px;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
    margin-top: 15px;
    border: 1px solid #cce5ff;
}

.note {
    background-color: #d1ecf1; /* Light cyan */
    border-left: 5px solid #17a2b8;
    padding: 15px;
    margin-top: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    color: #0c5460;
}

.example-code {
    background-color: #e3fde7; /* Light yellow for example */
    border-left: 5px solid #3dfa24; /* Orange-yellow */
    padding: 15px;
    margin-top: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    color: #856404;
}

.warning {
    background-color: #fff3cd; /* Light yellow */
    border-left: 5px solid #ffc107; /* Orange-yellow */
    padding: 15px;
    margin-top: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    color: #664d03;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    margin-bottom: 20px;
}

th, td {
    border: 1px solid #dee2e6;
    padding: 12px;
    text-align: left;
}

th {
    background-color: #e9ecef;
    color: #495057;
}

.question {
    margin-bottom: 25px;
    border: 1px solid #ddd;
    padding: 15px;
    border-radius: 5px;
    background-color: #fcfcfc;
}

    .question strong {
        color: #333;
    }

.answer-area {
    background-color: #e0eaff;
    padding: 10px;
    border-radius: 5px;
    margin-top: 10px;
    font-style: italic;
    color: #004085;
}

.table-definition {
    background-color: #f0f8ff;
    padding: 15px;
    border-left: 5px solid #007bff;
    margin-bottom: 20px;
    border-radius: 5px;
}

textarea.user-input {
    width: calc(100% - 20px);
    height: 80px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 14px;
    resize: vertical;
    margin-bottom: 10px;
}

.download-button {
    background-color: #007bff;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
    margin-top: 20px;
    margin-bottom: 10px;
}

    .download-button:hover {
        background-color: #0056b3;
    }

.test-data-button {
    background-color: #ff8c00;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
    margin-top: 30px;
    margin-bottom: 10px;
}

    .test-data-button:hover {
        background-color: #cc7000;
    }

.show-all-answers-button {
    background-color: #28a745;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
    margin-top: 20px;
    margin-bottom: 10px;
}

    .show-all-answers-button:hover {
        background-color: #218838;
    }

.section-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); /* レスポンシブ対応 */
    gap: 25px;
    margin-top: 30px;
}

.card {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
    padding: 25px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

    .card:hover {
        transform: translateY(-5px);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    }

    .card h2 {
        color: #34495e;
        font-size: 1.6em;
        margin-top: 0;
        margin-bottom: 15px;
        border-bottom: 1px solid #eee;
        padding-bottom: 10px;
    }

    .card ul {
        list-style: none;
        padding: 0;
        margin-top: 15px;
    }

        .card ul li {
            margin-bottom: 10px;
        }

            .card ul li a {
                text-decoration: none;
                color: #2980b9;
                font-size: 1.05em;
                display: block;
                padding: 5px 0;
                transition: color 0.3s ease;
            }

                .card ul li a:hover {
                    color: #1f618d;
                    text-decoration: underline;
                }

    .card .description {
        font-size: 0.85em;
        color: #777;
        margin-top: 3px;
        margin-left: 10px;
        display: block;
    }

.call-to-action {
    text-align: center;
    margin-top: 40px;
}

    .call-to-action a {
        display: inline-block;
        background-color: #28a745;
        color: white;
        padding: 12px 25px;
        border-radius: 5px;
        text-decoration: none;
        font-size: 1.1em;
        transition: background-color 0.3s ease;
    }

        .call-to-action a:hover {
            background-color: #218838;
        }

textarea.answer-output {
    width: calc(100% - 20px);
    height: 250px; /* 全体出力用は高めに */
    padding: 10px;
    border: 1px solid #007bff;
    border-radius: 4px;
    background-color: #eaf6ff;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 14px;
    resize: vertical;
    color: #0056b3;
    margin-top: 10px;
}
footer {
    text-align: center;
    margin-top: 50px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    color: #777;
    font-size: 0.9em;
}

.loading-progress {
    position: relative;
    display: block;
    width: 8rem;
    height: 8rem;
    margin: 20vh auto 1rem auto;
}

    .loading-progress circle {
        fill: none;
        stroke: #e0e0e0;
        stroke-width: 0.6rem;
        transform-origin: 50% 50%;
        transform: rotate(-90deg);
    }

        .loading-progress circle:last-child {
            stroke: #1b6ec2;
            stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
            transition: stroke-dasharray 0.05s ease-in-out;
        }

.loading-progress-text {
    position: absolute;
    text-align: center;
    font-weight: bold;
    inset: calc(20vh + 3.25rem) 0 auto 0.2rem;
}

    .loading-progress-text:after {
        content: var(--blazor-load-percentage-text, "Loading");
    }