:root {
    --primary-color: #2c3e50;
    --secondary-color: #27ae60;
    --accent-color: #e67e22;
    --text-color: #333;
    --bg-color: #f4f7f6;
    --white: #ffffff;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

nav {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--white);
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
}

.nav-links li {
    margin-left: 20px;
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--secondary-color);
}

main {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 0 20px;
    background: var(--white);
    box-shadow: 0 0 20px rgba(0,0,0,0.05);
    border-radius: 8px;
}

.content-section {
    padding: 2rem;
}

h1, h2, h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    margin-top: 1.5rem;
}

h1 { font-size: 2.5rem; text-align: center; border-bottom: 3px solid var(--secondary-color); padding-bottom: 10px; }
h2 { font-size: 1.8rem; border-left: 5px solid var(--secondary-color); padding-left: 15px; }

p { margin-bottom: 1.2rem; }

.svg-container {
    text-align: center;
    margin: 2rem 0;
}

.svg-container svg {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
}

table th, table td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: left;
}

table th {
    background-color: var(--secondary-color);
    color: white;
}

table tr:nth-child(even) { background-color: #f9f9f9; }

.faq-item {
    margin-bottom: 1.5rem;
    background: #fdfdfd;
    padding: 1rem;
    border-radius: 5px;
    border: 1px solid #eee;
}

.faq-question {
    font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

footer {
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-links {
    margin-bottom: 1rem;
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    margin: 0 10px;
    font-size: 0.9rem;
}

.footer-links a:hover { color: var(--white); }

@media (max-width: 768px) {
    .nav-links { display: none; }
    h1 { font-size: 1.8rem; }
}