/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

/* 头部 */
.header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
    padding: 30px 20px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

.header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

/* 模式选择器 */
.mode-selector {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.mode-btn {
    padding: 12px 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 12px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.mode-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.mode-btn.active {
    background: white;
    color: #667eea;
    border-color: white;
    font-weight: 600;
}

/* 主内容区域 */
.main-content {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    min-height: 400px;
}

.mode-content {
    display: none;
}

.mode-content.active {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 输入区域 */
.input-section {
    margin-bottom: 30px;
}

.input-section h2 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5em;
}

input[type="text"],
textarea,
select {
    width: 100%;
    padding: 15px;
    margin-bottom: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s ease;
}

textarea {
    resize: vertical;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

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

.input-row {
    display: flex;
    gap: 15px;
    align-items: center;
}

.input-row select {
    flex: 1;
}

/* 按钮 */
.btn-primary {
    padding: 15px 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 结果区域 */
.result-section {
    margin-top: 30px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 12px;
    border-left: 4px solid #667eea;
    white-space: pre-wrap;
    line-height: 1.8;
    color: #333;
}

.result-section:empty {
    display: none;
}

.result-section h3 {
    color: #667eea;
    margin-top: 20px;
    margin-bottom: 10px;
}

.result-section code {
    background: #282c34;
    color: #61dafb;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}

.result-section pre {
    background: #282c34;
    color: #abb2bf;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 15px 0;
}

.result-section pre code {
    background: none;
    color: inherit;
    padding: 0;
}

/* 页脚 */
.footer {
    text-align: center;
    color: white;
    margin-top: 30px;
    padding: 20px;
    opacity: 0.8;
}

.footer p {
    margin: 5px 0;
}

/* 加载指示器 */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.loading.hidden {
    display: none;
}

.loading p {
    color: white;
    font-size: 18px;
    margin-top: 20px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header h1 {
        font-size: 2em;
    }

    .mode-selector {
        gap: 8px;
    }

    .mode-btn {
        padding: 10px 15px;
        font-size: 13px;
    }

    .main-content {
        padding: 20px;
    }

    .input-row {
        flex-direction: column;
    }

    .input-row select {
        width: 100%;
    }
}

/* 美化滚动条 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #764ba2;
}