/* 基本樣式 */
body {
    font-family: 'Poppins', sans-serif;
    background-color: #ffffff;
    color: #333;
}

h1, h2, h3, h4 {
    font-family: 'Playfair Display', serif;
}

/* 響應式導航菜單樣式 */
.mobile-menu-button {
    display: none;
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background-color: #FFD166;
    color: #333;
    border: none;
    border-radius: 5px;
    padding: 10px;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: 70%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    z-index: 999;
    padding: 70px 20px 20px;
    box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

.mobile-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-menu li {
    margin-bottom: 15px;
}

.mobile-menu a {
    display: block;
    padding: 10px;
    color: #333;
    text-decoration: none;
    font-size: 18px;
    border-bottom: 1px solid #eee;
    transition: all 0.3s ease;
}

.mobile-menu a:hover {
    background-color: #FFD166;
    padding-left: 15px;
}

@media (max-width: 768px) {
    .mobile-menu-button {
        display: block;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .desktop-menu {
        display: none;
    }
}

/* 共用元素樣式 */
.vintage-border {
    border: 2px solid #333;
    box-shadow: 5px 5px 0px #333;
}

.dancing-element {
    animation: dance 3s infinite alternate ease-in-out;
}

@keyframes dance {
    0% { transform: translateY(0) rotate(0deg); }
    100% { transform: translateY(-10px) rotate(5deg); }
}

.btn-swing {
    transition: all 0.3s ease;
}

.btn-swing:hover {
    transform: rotate(-2deg) scale(1.05);
}

.record-spin {
    animation: spin 8s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.vintage-pattern {
    background-image: radial-gradient(#f0f0f0 10%, transparent 11%),
                    radial-gradient(#f0f0f0 10%, transparent 11%);
    background-size: 10px 10px;
    background-position: 0 0, 30px 30px;
    background-repeat: repeat;
}

/* 翻轉卡片樣式 */
.flip-card {
    perspective: 1000px;
    height: 300px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner {
    transform: rotateY(180deg);
}

/* 保留桌面端的hover效果 */
@media (hover: hover) {
    .flip-card:hover .flip-card-inner {
        transform: rotateY(180deg);
    }
}

.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 0.5rem;
}

.flip-card-back {
    transform: rotateY(180deg);
}

/* 為翻轉卡片的文字添加白色背景填充 */
.flip-card-back h3,
.flip-card-back li,
.flip-card-back p {
    background-color: rgba(255, 255, 255, 0.8);
    padding: 2px 5px;
    border-radius: 3px;
    display: inline-block;
}

/* 確保移動設備上的按鈕更容易點擊 */
@media (max-width: 768px) {
    .btn-swing, a[href^="https://docs.google.com"] {
        padding: 12px 20px !important;
        margin: 15px auto !important;
        display: block !important;
        width: 80% !important;
        text-align: center !important;
        font-size: 1.2rem !important;
    }
}