@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;500;600;700&display=swap');

body {
    font-family: 'Noto Serif SC', serif;
}

.tcm-pattern {
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(139, 69, 19, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(210, 105, 30, 0.1) 0%, transparent 50%);
}

.loading-spinner {
    border: 2px solid #f3f3f3;
    border-top: 2px solid #8B4513;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

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

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

/* 响应式优化 */
@media (max-width: 768px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .grid-cols-1.lg\\:grid-cols-2 {
        grid-template-columns: 1fr;
    }
}

/* 无效输入的样式 */
input:invalid {
    border-color: #f56565;
    box-shadow: 0 0 0 1px #f56565;
}

input:valid {
    border-color: #38a169;
}

/* 错误提示文本 */
.error-message {
    color: #f56565;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: none;
}

input:invalid + .error-message {
    display: block;
}

/* 症狀驗證提示 */
.symptom-validation-message {
    color: #f56565;
    font-size: 0.875rem;
    margin-top: 1rem;
    text-align: center;
    display: none;
}

/* 當沒有症狀時顯示提示 */
.symptom-form:invalid .symptom-validation-message {
    display: block;
}