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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    max-width: 600px;
    width: 100%;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 30px;
    text-align: center;
}

header {
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5em;
    color: #333;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.subtitle {
    color: #666;
    font-size: 1.1em;
}

/* 转盘容器 */
.wheel-container {
    margin: 40px 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.wheel-wrapper {
    position: relative;
    width: 400px;
    height: 400px;
}

#wheelCanvas {
    border-radius: 50%;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.1s ease-out;
}

/* 指针 */
.pointer {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 20px solid transparent;
    border-right: 20px solid transparent;
    border-top: 40px solid #FF6B6B;
    z-index: 10;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

/* 控制按钮 */
.controls {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin: 30px 0;
}

.btn {
    padding: 12px 30px;
    font-size: 1.1em;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    background: #f0f0f0;
    color: #333;
}

.btn-secondary:hover {
    background: #e0e0e0;
    transform: translateY(-2px);
}

/* 页脚作者信息 */
.footer {
    margin-top: 10px;
    padding-top: 12px;
    border-top: 1px solid #f0f0f0;
    color: #999;
    font-size: 0.9em;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.footer-sep {
    opacity: 0.6;
}

/* 响应式设计 */
@media (max-width: 600px) {
    .wheel-wrapper {
        width: 300px;
        height: 300px;
    }

    #wheelCanvas {
        width: 300px;
        height: 300px;
    }

    header h1 {
        font-size: 2em;
    }

    .controls {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}