/* 基礎樣式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 2;
}

/* 表情符號雨動畫 */
.emoji-rain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.rain-emoji {
    position: absolute;
    font-size: 20px;
    animation: fall linear infinite;
    opacity: 0.7;
}

@keyframes fall {
    0% {
        transform: translateY(-100px) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0;
    }
}

/* 標題區域 */
.hero {
    text-align: center;
    padding: 60px 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    margin-bottom: 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.title {
    font-size: 3.5rem;
    color: white;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.emoji-bounce {
    display: inline-block;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-20px);
    }
    60% {
        transform: translateY(-10px);
    }
}

.subtitle {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
}

.hero-emojis {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.floating-emoji {
    font-size: 3rem;
    animation: float 3s ease-in-out infinite;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.floating-emoji:hover {
    transform: scale(1.2) rotate(10deg);
}

.floating-emoji:nth-child(1) { animation-delay: 0s; }
.floating-emoji:nth-child(2) { animation-delay: 0.5s; }
.floating-emoji:nth-child(3) { animation-delay: 1s; }
.floating-emoji:nth-child(4) { animation-delay: 1.5s; }
.floating-emoji:nth-child(5) { animation-delay: 2s; }

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* 表情符號展示區 */
.emoji-showcase {
    margin-bottom: 60px;
}

.emoji-showcase h2 {
    text-align: center;
    font-size: 2.5rem;
    color: white;
    margin-bottom: 40px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.emoji-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.category {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 15px;
    padding: 25px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.category h3 {
    color: white;
    font-size: 1.5rem;
    margin-bottom: 20px;
    text-align: center;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.emoji-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.emoji-item {
    font-size: 2.5rem;
    text-align: center;
    padding: 15px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.emoji-item:hover {
    transform: scale(1.1) rotate(5deg);
    background: rgba(255, 255, 255, 0.3);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.emoji-item::after {
    content: attr(data-name);
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 0.8rem;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    white-space: nowrap;
}

.emoji-item:hover::after {
    opacity: 1;
}

/* 互動區域 */
.interactive-section {
    text-align: center;
    margin-bottom: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 40px;
    backdrop-filter: blur(10px);
}

.interactive-section h2 {
    font-size: 2.5rem;
    color: white;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.interactive-section p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
}

.interactive-emojis {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.interactive-btn {
    font-size: 4rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 20px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    position: relative;
}

.interactive-btn:hover {
    transform: scale(1.1);
    background: rgba(255, 255, 255, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.interactive-btn:active {
    transform: scale(0.95);
}

.click-counter {
    font-size: 1.5rem;
    color: white;
    font-weight: bold;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

#clickCount {
    color: #FFD700;
    font-size: 2rem;
}

/* 關於區域 */
.about {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 15px;
    padding: 40px;
    margin-bottom: 40px;
    backdrop-filter: blur(10px);
    text-align: center;
}

.about h2 {
    font-size: 2.5rem;
    color: white;
    margin-bottom: 25px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.about p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    margin-bottom: 20px;
}

/* 頁腳 */
.footer {
    text-align: center;
    padding: 30px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.footer p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1rem;
}

/* 點擊特效 */
.click-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
}

.click-effect {
    position: absolute;
    font-size: 2rem;
    animation: explode 1s ease-out forwards;
    pointer-events: none;
}

@keyframes explode {
    0% {
        transform: scale(0) rotate(0deg);
        opacity: 1;
    }
    50% {
        transform: scale(1.5) rotate(180deg);
        opacity: 0.8;
    }
    100% {
        transform: scale(2) rotate(360deg);
        opacity: 0;
    }
}

/* 響應式設計 */
@media (max-width: 1024px) {
    .container {
        padding: 15px;
    }
    
    .emoji-categories {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .category {
        padding: 20px;
    }
    
    .emoji-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
    
    .emoji-item {
        font-size: 2.2rem;
        padding: 12px;
    }
}

@media (max-width: 768px) {
    .title {
        font-size: 2.8rem;
        line-height: 1.2;
        margin-bottom: 15px;
    }
    
    .subtitle {
        font-size: 1.3rem;
        margin-bottom: 25px;
    }
    
    .hero {
        padding: 40px 20px;
        margin-bottom: 30px;
    }
    
    .hero-emojis {
        gap: 20px;
        margin-top: 20px;
    }
    
    .floating-emoji {
        font-size: 2.5rem;
    }
    
    .emoji-categories {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .category {
        padding: 20px 15px;
    }
    
    .category h3 {
        font-size: 1.4rem;
        margin-bottom: 15px;
    }
    
    .emoji-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
    
    .emoji-item {
        font-size: 2.2rem;
        padding: 12px 8px;
        border-radius: 8px;
        min-height: 60px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .emoji-item::after {
        bottom: -25px;
        font-size: 0.7rem;
        padding: 3px 6px;
    }
    
    .interactive-section {
        padding: 30px 20px;
        margin-bottom: 40px;
    }
    
    .interactive-section h2 {
        font-size: 2.2rem;
        margin-bottom: 15px;
    }
    
    .interactive-section p {
        font-size: 1.1rem;
        margin-bottom: 25px;
    }
    
    .interactive-emojis {
        gap: 15px;
        margin-bottom: 25px;
    }
    
    .interactive-btn {
        font-size: 3.5rem;
        padding: 18px;
        min-width: 80px;
        min-height: 80px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .about {
        padding: 30px 20px;
        margin-bottom: 30px;
    }
    
    .about h2 {
        font-size: 2.2rem;
        margin-bottom: 20px;
    }
    
    .about p {
        font-size: 1.1rem;
        line-height: 1.7;
    }
    
    .container {
        padding: 15px;
    }
    
    .footer {
        padding: 25px 15px;
    }
    
    .footer p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 2.2rem;
        padding: 0 10px;
    }
    
    .subtitle {
        font-size: 1.1rem;
        padding: 0 10px;
    }
    
    .hero {
        padding: 30px 15px;
    }
    
    .hero-emojis {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .floating-emoji {
        font-size: 2rem;
    }
    
    .emoji-showcase h2 {
        font-size: 2rem;
        margin-bottom: 30px;
    }
    
    .category {
        padding: 18px 12px;
    }
    
    .category h3 {
        font-size: 1.2rem;
        margin-bottom: 12px;
    }
    
    .emoji-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }
    
    .emoji-item {
        font-size: 1.8rem;
        padding: 10px 6px;
        min-height: 50px;
        border-radius: 6px;
    }
    
    .emoji-item::after {
        bottom: -22px;
        font-size: 0.6rem;
        padding: 2px 4px;
    }
    
    .interactive-section {
        padding: 25px 15px;
    }
    
    .interactive-section h2 {
        font-size: 1.8rem;
    }
    
    .interactive-section p {
        font-size: 1rem;
        margin-bottom: 20px;
    }
    
    .interactive-emojis {
        gap: 12px;
        margin-bottom: 20px;
    }
    
    .interactive-btn {
        font-size: 2.8rem;
        padding: 15px;
        min-width: 70px;
        min-height: 70px;
    }
    
    .click-counter {
        font-size: 1.3rem;
    }
    
    #clickCount {
        font-size: 1.6rem;
    }
    
    .about {
        padding: 25px 15px;
    }
    
    .about h2 {
        font-size: 1.8rem;
        margin-bottom: 18px;
    }
    
    .about p {
        font-size: 1rem;
        line-height: 1.6;
        margin-bottom: 15px;
    }
    
    .container {
        padding: 10px;
    }
    
    .footer {
        padding: 20px 10px;
    }
    
    .footer p {
        font-size: 0.9rem;
        line-height: 1.4;
    }
}

@media (max-width: 360px) {
    .title {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .floating-emoji {
        font-size: 1.6rem;
    }
    
    .emoji-item {
        font-size: 1.5rem;
        padding: 8px 4px;
        min-height: 45px;
    }
    
    .interactive-btn {
        font-size: 2.4rem;
        padding: 12px;
        min-width: 60px;
        min-height: 60px;
    }
    
    .interactive-emojis {
        gap: 8px;
    }
}