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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 1rem;
    text-align: center;
}

header h1 {
    margin-bottom: 0.5rem;
}

#user-info {
    margin-top: 1rem;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    margin: 0 0.5rem;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #2980b9;
}

nav {
    background-color: #34495e;
    color: white;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 1rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 1rem;
    display: block;
    transition: background-color 0.3s;
}

nav ul li a:hover {
    background-color: #2c3e50;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

section {
    margin-bottom: 2rem;
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h2 {
    color: #2c3e50;
    margin-bottom: 1rem;
    border-bottom: 2px solid #3498db;
    padding-bottom: 0.5rem;
}

footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
    }
    
    nav ul li {
        margin: 0;
    }
    
    main {
        padding: 1rem;
    }
    
    section {
        padding: 1rem;
    }
}

/* 游戏界面样式 */
.game-category {
    margin-bottom: 1rem;
}

.game-category h3 {
    color: #3498db;
    margin-bottom: 0.5rem;
}

.game-type {
    margin-left: 1rem;
    margin-bottom: 0.5rem;
}

.bet-option {
    display: inline-block;
    margin: 0.25rem;
    padding: 0.5rem;
    background-color: #ecf0f1;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.bet-option:hover {
    background-color: #bdc3c7;
}

.bet-option.selected {
    background-color: #3498db;
    color: white;
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: #f2f2f2;
}

/* 表单样式 */
form {
    max-width: 400px;
    margin: 0 auto;
}

input, select {
    width: 100%;
    padding: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
}

input[type="submit"] {
    background-color: #27ae60;
    color: white;
    cursor: pointer;
}

input[type="submit"]:hover {
    background-color: #229954;
}

/* 隐藏类 */
.hidden {
    display: none;
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 2rem;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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