/* 基礎樣式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 標題區域 */
.header {
    text-align: center;
    margin-bottom: 2rem;
    color: white;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

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

/* 主要內容區域 */
.main-content {
    flex: 1;
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
}

/* 表單樣式 */
.upload-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.file-label,
.textarea-label {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.label-text {
    font-weight: 600;
    color: #374151;
    font-size: 1rem;
}

.label-hint {
    font-size: 0.875rem;
    color: #6b7280;
}

.file-input {
    padding: 0.75rem;
    border: 2px dashed #d1d5db;
    border-radius: 10px;
    background: #f9fafb;
    transition: all 0.3s ease;
    cursor: pointer;
}

.file-input:hover {
    border-color: #667eea;
    background: #f0f4ff;
}

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

/* 影像預覽 */
.image-preview-container {
    display: flex;
    justify-content: center;
    margin: 1rem 0;
}

.image-preview {
    max-width: 100%;
    max-height: 300px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    object-fit: contain;
}

/* 文字區域 */
.prompt-textarea {
    padding: 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    resize: vertical;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

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

.prompt-textarea::placeholder {
    color: #9ca3af;
}

/* 提交按鈕 */
.submit-button {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: none;
}

.submit-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.submit-button:active:not(:disabled) {
    transform: translateY(0);
}

.submit-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 載入指示器 */
.loading-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    text-align: center;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid #f3f4f6;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    font-size: 1.1rem;
    color: #667eea;
    font-weight: 500;
}

/* 結果區域 */
.result-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid #e5e7eb;
}

.result-title {
    margin-bottom: 1rem;
    color: #374151;
    font-size: 1.5rem;
}

.result-content {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 1.5rem;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    max-height: 400px;
    overflow-y: auto;
}

.result-content.success {
    background: #f0fdf4;
    border-color: #bbf7d0;
    color: #166534;
}

.result-content.error {
    background: #fef2f2;
    border-color: #fecaca;
    color: #dc2626;
}

/* 頁尾 */
.footer {
    text-align: center;
    margin-top: 2rem;
    color: white;
    opacity: 0.8;
    font-size: 0.9rem;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .main-content {
        padding: 1.5rem;
        border-radius: 15px;
    }
    
    .submit-button {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.75rem;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .image-preview {
        max-height: 200px;
    }
}