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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 40px;
    padding: 40px 0;
}

h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

main {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

.controls {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    height: fit-content;
}

.control-group {
    margin-bottom: 25px;
}

.control-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #555;
}

input[type="number"],
input[type="text"],
select {
    width: 100%;
    padding: 10px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: #667eea;
}

input[type="range"] {
    width: 70%;
    margin-right: 10px;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.checkbox {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.checkbox input {
    margin-right: 8px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.generate-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.generate-btn:active {
    transform: translateY(0);
}

.output-section {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    grid-column: 2;
    grid-row: 1;
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.output-header h2 {
    color: #333;
}

.output-actions {
    display: flex;
    gap: 10px;
}

.action-btn {
    padding: 8px 16px;
    background: #f5f5f5;
    border: 1px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.action-btn:hover {
    background: #e0e0e0;
    border-color: #ccc;
}

.output-container {
    background: #f9f9f9;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    min-height: 300px;
    max-height: 500px;
    overflow-y: auto;
    font-family: 'Georgia', serif;
    line-height: 1.6;
}

.output-container p {
    margin-bottom: 15px;
}

.output-container h2,
.output-container h3 {
    margin: 20px 0 10px 0;
}

.output-container ul,
.output-container ol {
    margin: 10px 0;
    padding-left: 30px;
}

.output-container blockquote {
    border-left: 4px solid #667eea;
    padding-left: 15px;
    margin: 15px 0;
    font-style: italic;
    color: #666;
}

.placeholder {
    color: #999;
    text-align: center;
    padding: 50px;
}

.stats {
    display: flex;
    gap: 20px;
    margin-top: 15px;
    font-size: 14px;
    color: #666;
}

.stats span {
    padding: 5px 10px;
    background: #f0f0f0;
    border-radius: 4px;
}

.preview-section {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    grid-column: 1 / -1;
}

.preview-controls {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
}

.preview-controls label {
    font-weight: 600;
    color: #555;
}

.preview-controls input[type="range"] {
    width: 150px;
}

.preview-container {
    background: #f9f9f9;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    min-height: 200px;
}

footer {
    text-align: center;
    color: white;
    padding: 20px 0;
    opacity: 0.8;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    main {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .output-section {
        grid-column: 1;
        grid-row: 2;
    }

    h1 {
        font-size: 2rem;
    }

    .output-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

/* カスタムスクロールバー */
.output-container::-webkit-scrollbar,
.preview-container::-webkit-scrollbar {
    width: 8px;
}

.output-container::-webkit-scrollbar-track,
.preview-container::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.output-container::-webkit-scrollbar-thumb,
.preview-container::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

.output-container::-webkit-scrollbar-thumb:hover,
.preview-container::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* コピー成功アニメーション */
@keyframes copySuccess {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.copy-success {
    animation: copySuccess 0.3s ease;
    background: #4caf50 !important;
    color: white !important;
}