/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* Container */
.container {
    width: 100%;
    max-width: 500px;
}

/* Card */
.card {
    background: white;
    border-radius: 20px;
    padding: 60px 40px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: fadeIn 0.6s ease-out;
}

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

/* Icon */
.icon-wrapper {
    margin-bottom: 30px;
}

.globe-icon {
    width: 80px;
    height: 80px;
    color: #667eea;
    animation: rotate 20s linear infinite;
}

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

/* Typography */
.greeting {
    font-size: 48px;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 15px;
    letter-spacing: -1px;
}

.chinese {
    font-size: 32px;
    color: #667eea;
    margin-bottom: 20px;
    font-weight: 500;
}

.subtitle {
    font-size: 16px;
    color: #718096;
    margin-bottom: 40px;
    line-height: 1.6;
}

/* Button */
.btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 16px 32px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn:active {
    transform: translateY(0);
}

.btn i {
    width: 20px;
    height: 20px;
}

/* Responsive */
@media (max-width: 600px) {
    .card {
        padding: 40px 30px;
    }
    
    .greeting {
        font-size: 36px;
    }
    
    .chinese {
        font-size: 28px;
    }
    
    .globe-icon {
        width: 60px;
        height: 60px;
    }
}