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

body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background-color: #337d37;
    color: white;
    padding: 1rem 2rem;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

main.container {
    flex: 1;
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.editor-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
    height: 70vh;
}

.input-panel,
.output-panel {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
}

.input-panel h2,
.output-panel h2 {
    color: #337d37;
    margin-bottom: 1rem;
    font-size: 1.4rem;
    border-bottom: 2px solid #337d37;
    padding-bottom: 0.5rem;
}

.input-panel h3 {
    color: #337d37;
    margin: 1rem 0 0.5rem 0;
    font-size: 1.1rem;
}

#template-input,
#data-input {
    flex: 1;
    border: 2px solid #ddd;
    border-radius: 4px;
    padding: 1rem;
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-size: 14px;
    resize: none;
    background-color: #fafafa;
    transition: border-color 0.3s ease;
}

#data-input {
    flex: 0.4;
    min-height: 120px;
}

#template-input:focus,
#data-input:focus {
    outline: none;
    border-color: #337d37;
    background-color: white;
}

.output-display {
    flex: 1;
    background-color: #fafafa;
    border: 2px solid #ddd;
    border-radius: 4px;
    padding: 1rem;
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-size: 14px;
    white-space: pre-wrap;
    overflow-y: auto;
    min-height: 200px;
}

.error-display {
    background-color: #ffe6e6;
    border: 2px solid #ff4444;
    border-radius: 4px;
    padding: 1rem;
    margin-top: 1rem;
    color: #cc0000;
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-size: 14px;
}

.controls {
    text-align: center;
    margin-bottom: 2rem;
}

.render-button,
.clear-button {
    background-color: #337d37;
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 6px;
    cursor: pointer;
    margin: 0 0.5rem;
    transition: all 0.3s ease;
    font-weight: bold;
}

.clear-button {
    background-color: #666;
}

.render-button:hover {
    background-color: #2a6a2f;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(51, 125, 55, 0.3);
}

.clear-button:hover {
    background-color: #555;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(102, 102, 102, 0.3);
}

.render-button:active,
.clear-button:active {
    transform: translateY(0);
}

footer {
    background-color: #337d37;
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: auto;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .editor-section {
        grid-template-columns: 1fr;
        height: auto;
    }
    
    .input-panel,
    .output-panel {
        height: 300px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    main.container {
        padding: 1rem;
    }
    
    .render-button,
    .clear-button {
        display: block;
        width: 100%;
        margin: 0.5rem 0;
    }
}