/* 全局样式 */
:root {
    --primary-color: #4A6FFF;
    --secondary-color: #FF6B6B;
    --success-color: #4CAF50;
    --warning-color: #FFC107;
    --info-color: #2196F3;
    --light-bg: #F8F9FA;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* iPhone 16 样式模拟 */
.iphone-container {
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.iphone-container::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: 40%;
    height: 25px;
    background-color: #000;
    border-bottom-left-radius: 18px;
    border-bottom-right-radius: 18px;
    z-index: 10;
}

/* 应用样式 */
.word-card {
    transition: all 0.3s ease;
}

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

.btn-primary {
    background-color: var(--primary-color);
    border-radius: 12px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    filter: brightness(1.1);
}

/* 动画效果 */
@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.bounce {
    animation: bounce 2s infinite;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* 响应式调整 */
@media (max-width: 640px) {
    .iphone-container {
        transform: scale(0.9);
    }
}