/* 搜索区域 */
.search-section {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    justify-content: center;
}

#searchInput {
    flex: 1;
    max-width: 400px;
    padding: 12px 20px;
    border: 2px solid #ddd;
    border-radius: 25px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

#searchInput:focus {
    border-color: #667eea;
}

#searchBtn {
    padding: 12px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

#searchBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

#searchBtn:active {
    transform: translateY(0);
}

/* 导航按钮 */
.nav-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
    justify-content: center;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.nav-btn {
    padding: 10px 20px;
    background: white;
    border: 2px solid #ddd;
    border-radius: 20px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    color: #333;
}

.nav-btn:hover {
    border-color: #667eea;
    color: #667eea;
    transform: translateY(-2px);
}

.nav-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

/* 时区列表 */
.timezone-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.timezone-item {
    background: white;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

.timezone-item:hover {
    border-color: #667eea;
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.2);
}

.timezone-item h3 {
    color: #333;
    margin-bottom: 10px;
    font-size: 1.2em;
}

.timezone-item .time {
    color: #667eea;
    font-size: 1.5em;
    font-weight: bold;
    margin: 10px 0;
}

.timezone-item .location {
    color: #666;
    font-size: 0.9em;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    header h1 {
        font-size: 1.8em;
    }

    .nav-buttons {
        flex-direction: column;
    }

    .nav-btn {
        width: 100%;
    }

    .timezone-list {
        grid-template-columns: 1fr;
    }
}