body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #2c3e50;
    color: #ecf0f1;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}
header {
    margin-top: 20px;
    text-align: center;
}
h1 {
    margin-bottom: 10px;
    color: #f1c40f;
}
nav {
    background-color: #34495e;
    width: 100%;
    display: flex;
    justify-content: center;
    padding: 15px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}
nav a {
    color: #ecf0f1;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
    transition: color 0.3s;
}
nav a:hover {
    color: #f1c40f;
}
#container {
    width: 800px;
    height: 600px;
    background-color: #000;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    border-radius: 4px;
    overflow: hidden;
    margin: 20px 0;
    position: relative;
}
.instructions, .content-area {
    max-width: 800px;
    width: 90%;
    background-color: #34495e;
    padding: 20px;
    border-radius: 8px;
    line-height: 1.6;
    margin-bottom: 40px;
}
.instructions h2, .content-area h2 {
    margin-top: 0;
    color: #3498db;
}
ul {
    padding-left: 20px;
}
#loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
    color: white;
    font-size: 1.2em;
}
footer {
    margin-top: auto;
    padding: 20px;
    text-align: center;
    font-size: 0.9em;
    color: #bdc3c7;
    width: 100%;
    background-color: #2c3e50;
}
.project-image {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: 20px 0;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}