/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* 主要内容区域 */
.main-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.ip-info-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 800px;
    backdrop-filter: blur(10px);
}

/* IP显示区域 */
.ip-display {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 2px solid #f0f0f0;
}

.ip-display h2 {
    font-size: 1.5rem;
    color: #666;
    margin-bottom: 15px;
    font-weight: 400;
}

.ip-address {
    font-size: 2.2rem;
    font-weight: 600;
    color: #667eea;
    font-family: 'Courier New', monospace;
    background: #f8f9ff;
    padding: 15px 25px;
    border-radius: 10px;
    display: inline-block;
    border: 2px solid #e8ecff;
}

/* 位置信息区域 */
.location-info {
    margin-bottom: 40px;
}

.location-info h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 20px;
    font-weight: 500;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 4px solid #667eea;
}

.info-item .label {
    font-weight: 500;
    color: #666;
}

.info-item .value {
    font-weight: 600;
    color: #333;
}

/* 坐标信息容器 */
.coordinates-container {
    margin-bottom: 30px;
}

.coordinates-container h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 15px;
    font-weight: 500;
}

.coordinates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.coordinate-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 4px solid #28a745;
}

.coordinate-label {
    font-weight: 500;
    color: #666;
}

.coordinate-value {
    font-weight: 600;
    color: #333;
    font-family: 'Courier New', monospace;
}

.location-summary {
    background: #e8f5e8;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid #28a745;
}

.summary-text {
    margin: 0;
    color: #155724;
    font-size: 1.1rem;
    line-height: 1.5;
}

/* 访问信息 */
.visit-info {
    text-align: center;
    padding-top: 20px;
    border-top: 2px solid #f0f0f0;
}

.visit-time {
    color: #666;
    font-size: 0.95rem;
}

/* 页脚 */
.footer {
    text-align: center;
    margin-top: 40px;
    color: white;
    opacity: 0.8;
}

.footer p {
    margin-bottom: 10px;
}

.admin-link {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 20px;
    transition: all 0.3s ease;
    display: inline-block;
}

.admin-link:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .ip-info-card {
        padding: 25px;
        border-radius: 15px;
    }
    
    .ip-address {
        font-size: 1.8rem;
        padding: 12px 20px;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .info-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
    
    .coordinates-grid {
        grid-template-columns: 1fr;
    }
    
    .coordinate-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.8rem;
    }
    
    .ip-info-card {
        padding: 20px;
    }
    
    .ip-address {
        font-size: 1.5rem;
        padding: 10px 15px;
    }
    
    .location-summary {
        padding: 15px;
    }
    
    .summary-text {
        font-size: 1rem;
    }
}

/* 管理后台样式 */
.admin-container {
    background: white;
    min-height: 100vh;
}

.admin-header {
    background: #667eea;
    color: white;
    padding: 20px 0;
    margin-bottom: 30px;
}

.admin-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.admin-title {
    font-size: 1.5rem;
    font-weight: 500;
}

.logout-btn {
    background: rgba(255,255,255,0.2);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.3s ease;
}

.logout-btn:hover {
    background: rgba(255,255,255,0.3);
}

.admin-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 搜索和过滤区域 */
.search-filter {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 30px;
}

.search-form {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 200px;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.search-btn, .reset-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s ease;
}

.search-btn {
    background: #667eea;
    color: white;
}

.search-btn:hover {
    background: #5a6fd8;
}

.reset-btn {
    background: #6c757d;
    color: white;
}

.reset-btn:hover {
    background: #5a6268;
}

/* 数据表格 */
.data-table {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #333;
}

.table tr:hover {
    background: #f8f9ff;
}

.action-btn {
    padding: 5px 10px;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-size: 12px;
    margin-right: 5px;
}

.delete-btn {
    background: #dc3545;
    color: white;
}

.delete-btn:hover {
    background: #c82333;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
    gap: 10px;
}

.page-btn {
    padding: 8px 12px;
    border: 1px solid #ddd;
    background: white;
    color: #333;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.page-btn:hover,
.page-btn.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.page-info {
    color: #666;
    font-size: 14px;
}

/* 登录表单 */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-form {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.login-title {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
    font-size: 1.8rem;
    font-weight: 500;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 5px;
    color: #333;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

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

.login-btn {
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.login-btn:hover {
    background: #5a6fd8;
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 10px 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    border: 1px solid #f5c6cb;
}

.success-message {
    background: #d4edda;
    color: #155724;
    padding: 10px 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    border: 1px solid #c3e6cb;
}