/* 全局样式 */
:root {
    --primary-color: #ff6b6b;
    --secondary-color: #4ecdc4;
    --accent-color: #ffe66d;
    --text-color: #2d334a;
    --background-color: #f7f9fc;
    --card-background: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    flex: 1;
}

/* 语言选择器 */
.language-selector {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 100;
}

.language-selector select {
    padding: 0.5rem;
    border-radius: 20px;
    border: 1px solid var(--secondary-color);
    background-color: var(--card-background);
    color: var(--text-color);
    cursor: pointer;
    outline: none;
    transition: all 0.3s ease;
}

.language-selector select:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 5px var(--shadow-color);
}

/* 头部样式 */
header {
    text-align: center;
    margin-bottom: 2rem;
    animation: fadeIn 1s ease-in-out;
}

header h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1.2rem;
    color: var(--text-color);
    opacity: 0.8;
}

/* 生日卡片样式 */
.birthday-card {
    background-color: var(--card-background);
    border-radius: 15px;
    box-shadow: 0 10px 30px var(--shadow-color);
    padding: 2rem;
    margin-bottom: 2rem;
    animation: slideUp 0.8s ease-in-out;
}

.info-section {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    margin-bottom: 2rem;
}

.info-item {
    flex: 1;
    min-width: 250px;
    text-align: center;
    padding: 1rem;
    margin: 0.5rem;
    background-color: rgba(78, 205, 196, 0.1);
    border-radius: 10px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.info-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px var(--shadow-color);
}

.info-item h2 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.counter-container {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.counter {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-right: 0.5rem;
}

#days-unit {
    font-size: 1.5rem;
    color: var(--text-color);
}

.unit-selector select {
    padding: 0.5rem;
    border-radius: 5px;
    border: 1px solid var(--secondary-color);
    background-color: var(--card-background);
    color: var(--text-color);
    cursor: pointer;
    outline: none;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.unit-selector select:hover {
    border-color: var(--primary-color);
}

/* 生日祝福样式 */
.birthday-message {
    text-align: center;
    padding: 1.5rem;
    margin: 1rem 0;
    background-color: rgba(255, 230, 109, 0.2);
    border-radius: 10px;
    font-size: 1.3rem;
    color: var(--text-color);
    animation: pulse 2s infinite;
}

/* 有趣的事实样式 */
.fun-facts {
    margin-top: 2rem;
}

.fun-facts h2 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.fun-facts ul {
    list-style-type: none;
}

.fun-facts li {
    padding: 0.8rem;
    margin-bottom: 0.5rem;
    background-color: rgba(78, 205, 196, 0.05);
    border-radius: 5px;
    transition: transform 0.3s ease;
}

.fun-facts li:hover {
    transform: translateX(5px);
    background-color: rgba(78, 205, 196, 0.1);
}

/* 生肖和星座部分 */
.zodiac-section {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    margin-bottom: 2rem;
}

.zodiac-item {
    flex: 1;
    min-width: 250px;
    text-align: center;
    padding: 1.5rem;
    margin: 0.5rem;
    background-color: var(--card-background);
    border-radius: 15px;
    box-shadow: 0 5px 15px var(--shadow-color);
    transition: transform 0.3s ease;
}

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

.zodiac-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.zodiac-icon {
    font-size: 3rem;
    margin: 1rem 0;
    color: var(--accent-color);
}

.zodiac-item p {
    color: var(--text-color);
    opacity: 0.8;
}

/* 页脚样式 */
footer {
    text-align: center;
    padding: 1.5rem;
    background-color: var(--text-color);
    color: var(--card-background);
    margin-top: auto;
}

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

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(255, 107, 107, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(255, 107, 107, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 107, 107, 0); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .info-item, .zodiac-item {
        min-width: 100%;
        margin: 0.5rem 0;
    }
    
    .counter {
        font-size: 2.5rem;
    }
    
    .language-selector {
        top: 0.5rem;
        right: 0.5rem;
    }
    
    .language-selector select {
        padding: 0.3rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.8rem;
    }
    
    header p {
        font-size: 1rem;
    }
    
    .info-item h2, .fun-facts h2, .zodiac-item h3 {
        font-size: 1.2rem;
    }
    
    .counter {
        font-size: 2rem;
    }
    
    .birthday-message {
        font-size: 1.1rem;
        padding: 1rem;
    }
    
    .zodiac-icon {
        font-size: 2.5rem;
    }
}