body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    overflow: hidden;
}

#background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transition: background 0.5s ease;
}

#card-container {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    perspective: 1000px;
    height: 70vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.card {
    position: absolute;
    width: 300px;
    height: 200px;
    background: #ffffa5; /* 默认颜色，将在 JavaScript 中动态更改 */
    border-radius: 20px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
    transition: transform 0.3s ease, opacity 0.3s ease;
    backface-visibility: hidden;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    overflow: hidden; /* 确保内容不会溢出卡片 */
}

.card-content-wrapper {
    height: 160px; /* 调整高度以适应卡片大小 */
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card-content {
    text-align: center;
    font-size: 18px;
    color: #333;
    padding-bottom: 20px; /* 为时间标签留出空间 */
}

.card-content img {
    max-width: 75px; /* 卡片宽度的1/4 */
    max-height: 75px;
    object-fit: cover;
    cursor: pointer;
    margin: 5px 5px 0 0; /* 上右下左 */
    border-radius: 5px;
    vertical-align: bottom; /* 将图片对齐到文字底部 */
}

.card-time {
    position: absolute;
    bottom: 10px;
    right: 10px;
    font-size: 12px;
    color: #666;
}

#input-container {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    width: 90%;
    max-width: 500px;
    padding: 10px;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

#input-container.focused {
    bottom: 50%;
    transform: translate(-50%, 50%);
}

#wish-input {
    flex-grow: 1; /* 让输入框占据剩余空间 */
    padding: 10px;
    font-size: 16px;
    border: none;
    border-radius: 20px;
    outline: none;
}

#send-button {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #007AFF;
    color: white;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    white-space: nowrap; /* 防止按钮文字换行 */
    user-select: none; /* 防止文字被选中 */
    -webkit-user-select: none; /* 针对 Safari 的兼容性 */
    -moz-user-select: none; /* 针对 Firefox 的兼容性 */
    -ms-user-select: none; /* 针对旧版 IE 的兼容性 */
}

.confetti {
    position: fixed;
    opacity: 0;
    animation: confetti-burst 3s ease-out forwards;
}

.confetti-circle {
    border-radius: 50%;
}

.confetti-rectangle {
    width: 8px;
    height: 16px;
}

.confetti-triangle {
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 12px solid;
    background-color: transparent !important;
}

.confetti-star {
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}

.confetti-heart {
    width: 10px;
    height: 10px;
    background-color: red;
    transform: rotate(-45deg);
    position: relative;
}

.confetti-heart:before,
.confetti-heart:after {
    content: "";
    width: 10px;
    height: 10px;
    background-color: red;
    border-radius: 50%;
    position: absolute;
}

.confetti-heart:before {
    top: -5px;
    left: 0;
}

.confetti-heart:after {
    top: 0;
    left: 5px;
}

@keyframes confetti-burst {
    0% {
        transform: scale(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: scale(1) translate(var(--tx), var(--ty)) rotate(var(--tr));
        opacity: 0;
    }
}

@keyframes confetti-sway {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(var(--sx)); }
}

@keyframes confetti-shake {
    0%, 100% { margin-left: 0; }
    25% { margin-left: -5px; }
    75% { margin-left: 5px; }
}

.delete-button {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 20px;
    height: 20px;
    background-color: rgba(255, 0, 0, 0.7);
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
}

.delete-button:hover {
    background-color: rgba(255, 0, 0, 1);
}

.apple-celebration {
    position: fixed;
    opacity: 0;
    animation: apple-celebration 1.5s ease-out forwards;
}

.celebration-triangle::after {
    content: '▲';
}

.celebration-star::after {
    content: '★';
}

.celebration-heart::after {
    content: '♥';
}

.celebration-trumpet::after {
    content: '🎺';
}

.celebration-celebration::after {
    content: '🎉';
}

@keyframes apple-celebration {
    0% {
        transform: scale(0) rotate(0deg);
        opacity: 0;
    }
    50% {
        transform: scale(1.2) rotate(180deg);
        opacity: 1;
    }
    100% {
        transform: scale(1) rotate(360deg);
        opacity: 0;
    }
}

@keyframes confetti-sway {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(var(--sx)); }
}

@keyframes confetti-shake {
    0%, 100% { margin-left: 0; }
    25% { margin-left: -5px; }
    75% { margin-left: 5px; }
}

.rocket-gif {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 99px; /* 卡片宽度的33%，假设卡片宽度为300px */
    height: auto;
    z-index: 1001;
    animation: rocketLaunch 3s cubic-bezier(0.47, 0, 0.745, 0.715) forwards;
}

@keyframes rocketLaunch {
    0% {
        bottom: -100px;
        transform: translateX(-50%) scale(1);
    }
    20% { /* 缓冲期 */
        bottom: 0;
        transform: translateX(-50%) scale(1);
    }
    100% {
        bottom: 120%;
        transform: translateX(-50%) scale(0.5) rotate(5deg);
    }
}

.star {
    position: fixed;
    background: white;
    border-radius: 50%;
    animation: twinkle 1s infinite alternate;
    z-index: 1000;
}

@keyframes twinkle {
    0% { opacity: 0.3; }
    100% { opacity: 1; }
}

.moon {
    position: fixed;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: #FFFF99;
    box-shadow: 0 0 20px #FFFF99;
    z-index: 1000;
}

.shooting-star {
    position: fixed;
    width: 2px;
    height: 2px;
    background: white;
    animation: shoot 1s linear;
    z-index: 1000;
}

@keyframes shoot {
    0% { transform: translateX(0) translateY(0); }
    100% { transform: translateX(-100px) translateY(100px); }
}

.shake {
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

@keyframes shake {
    10%, 90% {
        transform: translate3d(-1px, 0, 0);
    }
    20%, 80% {
        transform: translate3d(2px, 0, 0);
    }
    30%, 50%, 70% {
        transform: translate3d(-4px, 0, 0);
    }
    40%, 60% {
        transform: translate3d(4px, 0, 0);
    }
}

.image-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.9);
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.modal-content {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
}

.close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}

.modal-nav {
    margin-top: 20px;
}

.modal-nav button {
    padding: 10px 20px;
    margin: 0 10px;
    font-size: 16px;
    background-color: #007AFF;
    color: white;
    border: none;
    border-radius: 20px;
    cursor: pointer;
}

.modal-nav button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

@keyframes scrollText {
    0% { transform: translateY(0); }
    100% { transform: translateY(-100%); }
}

/* 适配小屏幕设备 */
@media (max-width: 480px) {
    #input-container {
        bottom: 10px;
        width: 95%;
    }

    #wish-input {
        font-size: 16px; /* 保持较大的字体大小，防止iOS自动缩放 */
    }

    #send-button {
        padding: 10px 15px;
        font-size: 16px;
    }
}