/* 全局样式 */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #27ae60;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --text-color: #333;
    --text-light: #7f8c8d;
    --border-radius: 12px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(135deg, #f5f7fa 0%, #e4efe9 100%);
    min-height: 100vh;
}

/* 导航栏样式 */
.navbar {
    background-color: white;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0.8rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1.5rem;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.logo i {
    margin-right: 0.5rem;
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link:hover {
    background-color: var(--light-color);
    color: var(--secondary-color);
}

.auth-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* 主要内容区域 */
.main-content {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1.5rem;
    min-height: 70vh;
}

/* 页面加载器 */
.page-loader {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

.panda-loading {
    text-align: center;
    color: var(--secondary-color);
}

.panda-loading i {
    font-size: 3rem;
    animation: bounce 1s infinite;
    margin-bottom: 1rem;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

/* 表单样式 */
.form-container {
    max-width: 500px;
    margin: 2rem auto;
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--primary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 2px solid #ddd;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
}

.btn:hover {
    background-color: #219653;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--primary-color);
}

.btn-danger {
    background-color: var(--accent-color);
}

/* 熊猫卡片 */
.panda-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.panda-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.panda-card:hover {
    transform: translateY(-5px);
}

.panda-image {
    height: 200px;
    background: linear-gradient(135deg, #e0f7fa 0%, #b2ebf2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--secondary-color);
}

.panda-info {
    padding: 1.5rem;
}

.panda-info h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.panda-meta {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 关系图容器 */
.family-tree-container {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-top: 2rem;
    min-height: 500px;
    position: relative;
    overflow: auto;
}

/* 页脚 */
.footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.api-info {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--light-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
        background: none;
        border: none;
        font-size: 1.5rem;
        color: var(--primary-color);
        cursor: pointer;
    }
    
    .panda-grid {
        grid-template-columns: 1fr;
    }
    
    .form-container {
        padding: 1rem;
    }
}

/* 模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.modal-content {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
}

/* 工具类 */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }
.mt-1 { margin-top: 1rem; }
.mb-1 { margin-bottom: 1rem; }


/* 管理员相关样式 */
.admin-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-edit {
    background-color: #3498db;
    color: white;
}

.btn-edit:hover {
    background-color: #2980b9;
}

.btn-delete {
    background-color: #e74c3c;
    color: white;
}

.btn-delete:hover {
    background-color: #c0392b;
}

/* 表单相关样式 */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.form-actions .btn {
    flex: 1;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
}

/* 熊猫图片样式 */
.panda-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 熊猫操作按钮组 */
.panda-actions {
    margin-top: 1rem;
}

/* 用户角色指示器 */
.user-role-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background-color: var(--secondary-color);
    color: white;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-left: 0.5rem;
    text-transform: uppercase;
}

/* 权限提示 */
.permission-hint {
    background-color: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin: 1rem 0;
    color: #856404;
}

.permission-hint i {
    margin-right: 0.5rem;
}

/* 表单验证样式 */
.form-group input:invalid,
.form-group select:invalid,
.form-group textarea:invalid {
    border-color: #e74c3c;
}

.form-group input:valid,
.form-group select:valid,
.form-group textarea:valid {
    border-color: #27ae60;
}

/* 加载状态 */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .header-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .header-actions .btn {
        width: 100%;
    }
}