:root {
    --primary-color: #2c3e50;
    --accent-color: #3498db;
    --text-color: #333;
    --bg-color: #f4f4f4;
    --card-bg: #fff;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
}

header {
    background-color: var(--primary-color);
    color: #fff;
    padding: 2rem 0;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
}

header p {
    font-size: 1.2rem;
    opacity: 0.8;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

section {
    margin-bottom: 4rem;
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

section:hover {
    transform: translateY(-5px);
}

h2 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.5rem;
    margin-top: 0;
}

.gallery-item {
    margin-top: 2rem;
    text-align: center;
}

.gallery-item img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border: 1px solid #ddd;
    cursor: pointer;
    transition: transform 0.2s;
}

.gallery-item img:hover {
    transform: scale(1.02);
}

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    z-index: 1000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.9);
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

.lightbox img {
    max-width: 90%;
    max-height: 90%;
    box-shadow: 0 0 20px rgba(255,255,255,0.1);
    border-radius: 4px;
}

.caption {
    margin-top: 1rem;
    font-style: italic;
    color: #666;
}

.tech-diagram {
    background-color: #fff;
    padding: 1rem;
    border-radius: 4px;
}

footer {
    text-align: center;
    padding: 2rem;
    background-color: var(--primary-color);
    color: #fff;
    margin-top: 4rem;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    header h1 {
        font-size: 2rem;
    }
}