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

:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #10b981;
    --danger-color: #ef4444;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --bg-gray: #f9fafb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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: var(--text-primary);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* Header样式 */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #6366f1 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.header h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.header .subtitle {
    font-size: 16px;
    opacity: 0.9;
}

/* 表单容器 */
.form-wrapper {
    padding: 30px;
}

.form-section {
    margin-bottom: 24px;
}

.form-section label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 14px;
}

/* 表单控件 */
.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    transition: var(--transition);
    background: white;
    color: var(--text-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-control:disabled {
    background-color: var(--bg-gray);
    cursor: not-allowed;
}

/* 参数区域 */
.params-area {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 2px dashed var(--border-color);
}

.params-area .param-field {
    margin-bottom: 20px;
}

.params-area .param-field label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 14px;
}

.params-area .param-field label .required {
    color: var(--danger-color);
    font-size: 16px;
}

/* 文件上传控件 */
.file-upload {
    position: relative;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    background: var(--bg-gray);
}

.file-upload:hover {
    border-color: var(--primary-color);
    background: rgba(79, 70, 229, 0.05);
}

.file-upload input[type="file"] {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
    cursor: pointer;
}

.upload-icon {
    font-size: 48px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.upload-text {
    color: var(--text-secondary);
    font-size: 14px;
}

.file-preview {
    margin-top: 12px;
    padding: 12px;
    background: white;
    border-radius: 6px;
    display: none;
}

.file-preview.active {
    display: block;
}

.file-preview img,
.file-preview video {
    max-width: 100%;
    max-height: 200px;
    border-radius: 6px;
    margin-top: 8px;
}

.file-name {
    font-size: 13px;
    color: var(--text-primary);
    font-weight: 500;
}

/* 按钮容器 */
.button-container {
    margin-top: 32px;
    text-align: center;
}

.btn-generate {
    padding: 14px 48px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #6366f1 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    min-width: 160px;
    position: relative;
    overflow: hidden;
}

.btn-generate:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-generate:active:not(:disabled) {
    transform: translateY(0);
}

.btn-generate:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-loading {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* 结果区域 */
.result-area {
    margin: 30px;
    padding: 24px;
    background: var(--bg-gray);
    border-radius: 12px;
    border: 2px solid var(--border-color);
}

.result-area h3 {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.result-content {
    background: white;
    padding: 20px;
    border-radius: 8px;
}

.status-indicator {
    text-align: center;
    padding: 20px;
}

.spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto 16px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

#statusText {
    color: var(--text-secondary);
    font-size: 14px;
}

.result-data {
    margin-top: 16px;
}

.result-data pre {
    background: var(--bg-gray);
    padding: 16px;
    border-radius: 6px;
    overflow-x: auto;
    font-size: 13px;
    line-height: 1.5;
}

.result-data img,
.result-data video {
    max-width: 100%;
    border-radius: 8px;
    margin-top: 12px;
}

/* Toast提示 */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 16px 24px;
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    transform: translateX(400px);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    max-width: 320px;
    border-left: 4px solid var(--primary-color);
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    border-left-color: var(--secondary-color);
}

.toast.error {
    border-left-color: var(--danger-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .container {
        border-radius: 12px;
    }

    .header {
        padding: 30px 20px;
    }

    .header h1 {
        font-size: 24px;
    }

    .form-wrapper {
        padding: 20px;
    }

    .btn-generate {
        width: 100%;
        padding: 14px 24px;
    }

    .toast {
        right: 10px;
        left: 10px;
        max-width: none;
    }
}

/* 输入框验证状态 */
.form-control.error,
.file-upload.error {
    border-color: var(--danger-color);
}

.form-control.success {
    border-color: var(--secondary-color);
}

/* 加载动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.params-area .param-field {
    animation: fadeIn 0.3s ease-out;
}