* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #000;
    background: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: #000;
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: bold;
    font-size: 1.2rem;
}

.logo img {
    height: 32px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: #fff;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: #333;
}

/* Main content */
main {
    min-height: calc(100vh - 120px);
    padding: 2rem 0;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 300;
    text-align: center;
    margin-bottom: 1rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.divider {
    width: 60px;
    height: 2px;
    background: #000;
    margin: 2rem auto;
}

.content {
    margin-top: 3rem;
}

.definition {
    background: #f9f9f9;
    padding: 2rem;
    border-left: 4px solid #000;
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

.definition p {
    margin-bottom: 1rem;
}

.definition p:last-child {
    margin-bottom: 0;
}

/* Navigation grid */
.navigation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.nav-card {
    border: 2px solid #000;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s;
}

.nav-card:hover {
    transform: translateY(-5px);
}

.nav-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 400;
}

.nav-card p {
    margin-bottom: 1.5rem;
    color: #666;
}

.btn {
    display: inline-block;
    background: #000;
    color: #fff;
    padding: 0.8rem 2rem;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s;
}

.btn:hover {
    background: #333;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: #fff;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background: #f9f9f9;
    font-weight: bold;
    border-bottom: 2px solid #000;
}

tr:hover {
    background: #f9f9f9;
}

/* Code blocks */
code {
    background: #f4f4f4;
    padding: 0.2rem 0.4rem;
    font-family: 'Courier New', monospace;
    border-radius: 3px;
}

pre {
    background: #f9f9f9;
    padding: 1rem;
    border-left: 4px solid #000;
    overflow-x: auto;
    margin: 1rem 0;
}

/* Lists */
ul, ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Links */
a {
    color: #000;
    font-weight: bold;
}

em {
    background: #f0f0f0;
    padding: 0.1rem 0.3rem;
    font-style: normal;
    font-weight: bold;
}

/* Section styling */
.section {
    margin: 3rem 0;
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    font-weight: 300;
    border-bottom: 2px solid #000;
    padding-bottom: 0.5rem;
}

.section h3 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem 0;
    font-weight: 400;
}

.section h4 {
    font-size: 1.2rem;
    margin: 1.5rem 0 0.5rem 0;
    font-weight: 500;
}

/* Highlight boxes */
.highlight {
    background: #f9f9f9;
    border: 2px solid #000;
    padding: 1.5rem;
    margin: 2rem 0;
}

.tip {
    background: #f0f0f0;
    border-left: 4px solid #000;
    padding: 1rem 1.5rem;
    margin: 1rem 0;
}

.tip::before {
    content: "🔥 ";
    font-weight: bold;
}

/* Footer */
footer {
    background: #f9f9f9;
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid #ddd;
    margin-top: 4rem;
    color: #666;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .navigation-grid {
        grid-template-columns: 1fr;
    }

    table {
        font-size: 0.9rem;
    }

    th, td {
        padding: 0.5rem;
    }
} 