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

body {
    font-family: 'Arial', sans-serif;
    background-color: #ffffff;
    color: #000000;
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: #000000;
    color: #ffffff;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #ffffff;
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 300;
    letter-spacing: 2px;
}

/* Navigation */
nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

nav a {
    color: #ffffff;
    text-decoration: none;
    font-weight: 300;
    transition: color 0.3s ease;
    padding: 10px 0;
    border-bottom: 2px solid transparent;
}

nav a:hover,
nav a.active {
    color: #cccccc;
    border-bottom-color: #ffffff;
}

/* Main Content */
main {
    min-height: calc(100vh - 140px);
    padding: 60px 0;
}

.page-title {
    font-size: 48px;
    font-weight: 300;
    text-align: center;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.page-subtitle {
    font-size: 18px;
    text-align: center;
    color: #666666;
    margin-bottom: 60px;
    font-weight: 300;
}

.content-section {
    margin-bottom: 50px;
}

.content-section h2 {
    font-size: 32px;
    font-weight: 300;
    margin-bottom: 30px;
    color: #000000;
    border-bottom: 1px solid #e0e0e0;
    padding-bottom: 10px;
}

.content-section h3 {
    font-size: 24px;
    font-weight: 400;
    margin-bottom: 20px;
    color: #333333;
}

.content-section p {
    margin-bottom: 20px;
    color: #444444;
    font-weight: 300;
}

.content-section ul {
    margin-bottom: 20px;
    padding-left: 30px;
}

.content-section li {
    margin-bottom: 10px;
    color: #444444;
    font-weight: 300;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: #000000;
    color: #ffffff;
    text-decoration: none;
    border: 2px solid #000000;
    transition: all 0.3s ease;
    font-weight: 300;
    text-align: center;
}

.btn:hover {
    background-color: #ffffff;
    color: #000000;
}

.btn-outline {
    background-color: transparent;
    color: #000000;
}

.btn-outline:hover {
    background-color: #000000;
    color: #ffffff;
}

/* Grid Layout */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.grid-item {
    padding: 30px;
    border: 1px solid #e0e0e0;
    transition: border-color 0.3s ease;
}

.grid-item:hover {
    border-color: #000000;
}

/* Footer */
footer {
    background-color: #000000;
    color: #ffffff;
    text-align: center;
    padding: 30px 0;
    font-weight: 300;
}

.footer-links {
    margin-bottom: 30px;
}

.footer-links h3 {
    color: #ffffff;
    margin-bottom: 20px;
    font-size: 18px;
    font-weight: 300;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 10px;
    max-width: 800px;
    margin: 0 auto;
}

.links-grid a {
    color: #ffffff;
    text-decoration: none;
    padding: 8px 12px;
    border: 1px solid #333333;
    border-radius: 5px;
    transition: all 0.3s ease;
    background-color: #1a1a1a;
    font-size: 14px;
    font-weight: 300;
}

.links-grid a:hover {
    background-color: #ffffff;
    color: #000000;
    border-color: #ffffff;
    transform: translateY(-2px);
}

/* Navigation between pages */
.page-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid #e0e0e0;
}

.nav-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #000000;
    font-weight: 300;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #666666;
}

.nav-link .arrow {
    font-size: 20px;
    margin: 0 10px;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 20px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .page-title {
        font-size: 36px;
    }
    
    .page-navigation {
        flex-direction: column;
        gap: 20px;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
}

/* External links styling */
a[target="_blank"] {
    color: #000000;
    text-decoration: underline;
    transition: color 0.3s ease;
    font-weight: 400;
}

a[target="_blank"]:hover {
    color: #666666;
    text-decoration: none;
}

/* Image containers */
.screenshot-container {
    text-align: center;
    margin: 2rem 0;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background: #ffffff;
}

.screenshot-container:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.screenshot-container img {
    width: 100%;
    height: auto;
    display: block;
    border-bottom: 1px solid #e0e0e0;
}

.screenshot-container .caption {
    padding: 1rem;
    margin: 0;
    font-size: 0.9rem;
    color: #666666;
    background: #f8f9fa;
    font-style: italic;
    font-weight: 300;
}