/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部样式 */
header {
    text-align: center;
    margin-bottom: 30px;
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header p {
    font-size: 1.1rem;
    color: #666;
}



/* 输入区域 */
.input-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.input-container {
    margin-bottom: 20px;
}

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

#promptInput {
    width: 100%;
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 16px;
    resize: vertical;
    min-height: 120px;
    transition: all 0.3s ease;
    font-family: inherit;
}

#promptInput:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* 按钮样式 */
.optimize-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.optimize-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

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

.optimize-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* 结果区域 */
.result-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.result-container {
    margin-bottom: 20px;
}

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

.result-output {
    background: #f8f9fa;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    padding: 20px;
    min-height: 150px;
    font-size: 16px;
    line-height: 1.8;
    white-space: pre-wrap;
    word-wrap: break-word;
}

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

.result-output.has-content {
    color: #333;
    background: #fff;
    border-color: #667eea;
}

.action-buttons {
    display: flex;
    gap: 10px;
}

.action-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.copy-btn {
    background: #28a745;
    color: white;
}

.copy-btn:hover:not(:disabled) {
    background: #218838;
}

.copy-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.clear-btn {
    background: #dc3545;
    color: white;
}

.clear-btn:hover {
    background: #c82333;
}

/* 示例区域 */
.examples {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.examples h3 {
    margin-bottom: 15px;
    color: #555;
}

.example-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 10px;
}

.example-item {
    background: #f8f9fa;
    padding: 12px 15px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    font-size: 14px;
    text-align: center;
}

.example-item:hover {
    background: #e9ecef;
    border-color: #667eea;
    transform: translateY(-2px);
}

/* 页脚 */
footer {
    text-align: center;
    margin-top: 30px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .example-items {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
}

/* 加载动画 */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-spinner {
    animation: spin 1s linear infinite;
}

/* 成功提示动画 */
.success-flash {
    animation: flash 0.5s ease-in-out;
}

@keyframes flash {
    0% { background-color: #d4edda; }
    50% { background-color: #c3e6cb; }
    100% { background-color: #d4edda; }
}