body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; margin: 0; padding: 0; background: #f4f7f6; color: #333; line-height: 1.6; }
header { background: #2c3e50; color: #fff; padding: 1rem 0; text-align: center; }
nav { margin-top: 10px; }
nav a { color: #fff; margin: 0 15px; text-decoration: none; font-weight: bold; font-size: 1.1rem; }
.container { max-width: 800px; margin: 20px auto; padding: 20px; background: #fff; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
.tool-box { background: #e8f6f3; padding: 25px; border-radius: 8px; border: 2px solid #1abc9c; text-align: center; margin-bottom: 30px; }
.tool-box input, .tool-box select { padding: 10px; width: 80%; margin: 10px 0; border: 1px solid #ddd; border-radius: 4px; }
.btn { background: #e67e22; color: #fff; border: none; padding: 12px 25px; cursor: pointer; font-size: 1.1rem; border-radius: 4px; width: 80%; }
.btn:hover { background: #d35400; }
#result { margin-top: 20px; font-weight: bold; font-size: 1.2rem; color: #2c3e50; display: none; padding: 15px; background: #fff; border-radius: 4px; }
h1 { color: #2c3e50; }
h2 { color: #e67e22; border-bottom: 2px solid #f4f7f6; padding-bottom: 10px; }
.blog-list-item { padding: 15px; border-bottom: 1px solid #eee; }
.blog-list-item a { text-decoration: none; color: #2980b9; font-weight: bold; font-size: 1.1rem; }
footer { text-align: center; margin-top: 40px; padding: 20px; font-size: 0.8rem; color: #777; border-top: 1px solid #ddd; }
footer a { color: #555; text-decoration: none; margin: 0 10px; }
.ad-space { width: 100%; height: 250px; background: #eee; margin: 20px 0; text-align: center; line-height: 250px; color: #aaa; border: 1px dashed #ccc; }
.nav-links { margin-top: 20px; display: flex; justify-content: space-between; }