/* ============================================
   食物老虎机 - 公共样式
   ============================================ */

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: hidden;
    position: relative;
}

/* 页面标题 */
.page-title {
    color: #fff;
    font-size: 28px;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
    text-align: center;
}

/* 主按钮 */
.btn-primary {
    padding: 14px 40px;
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, #FF6B6B 0%, #FF8E53 100%);
    border: none;
    border-radius: 25px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.5);
}

.btn-secondary {
    padding: 12px 30px;
    font-size: 16px;
    font-weight: 600;
    color: #666;
    background: #f0f0f0;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-secondary:hover {
    background: #e0e0e0;
}

/* 导航栏 */
.nav-bar {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 100;
}

.nav-link {
    color: #fff;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    background: rgba(255,255,255,0.2);
    transition: all 0.3s ease;
    font-size: 14px;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255,255,255,0.4);
}

/* 卡片容器 */
.card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 24px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.card-title {
    font-size: 20px;
    font-weight: 700;
    color: #333;
    margin-bottom: 16px;
    text-align: center;
}

.card-content {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 按钮组 */
.button-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

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