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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

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

header code {
    background: rgba(255, 255, 255, 0.2);
    padding: 4px 8px;
    border-radius: 4px;
}

main {
    padding: 30px;
}

.prompt-section {
    margin-bottom: 20px;
}

.prompt-section label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
}

#prompt {
    width: 100%;
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1em;
    font-family: inherit;
    resize: vertical;
    transition: border-color 0.3s;
}

#prompt:focus {
    outline: none;
    border-color: #667eea;
}

.settings-section {
    margin-bottom: 20px;
}

details {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 15px;
}

summary {
    cursor: pointer;
    font-weight: 600;
    color: #667eea;
    user-select: none;
}

summary:hover {
    color: #764ba2;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 15px;
}

.setting label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.setting input[type="range"] {
    width: 100%;
    cursor: pointer;
}

.button-section {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
}

.generate-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.1em;
    font-weight: 600;
    border-radius: 8px;
    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);
}

.generate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.status {
    font-size: 1.5em;
}

.output-section h3 {
    color: #333;
    margin-bottom: 15px;
}

.output {
    background: #f8f9fa;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    min-height: 150px;
    font-family: 'Courier New', monospace;
    white-space: pre-wrap;
    word-wrap: break-word;
    line-height: 1.6;
    color: #333;
}

.output.empty {
    color: #999;
    font-style: italic;
}

.output.error {
    color: #dc3545;
    background: #fff5f5;
    border-color: #dc3545;
}

footer {
    background: #f8f9fa;
    padding: 20px;
    text-align: center;
    color: #666;
    font-size: 0.9em;
}

footer code {
    background: white;
    padding: 4px 8px;
    border-radius: 4px;
    border: 1px solid #e0e0e0;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }

    .settings-grid {
        grid-template-columns: 1fr;
    }

    .button-section {
        flex-direction: column;
        align-items: stretch;
    }
}