:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --text-color: #333;
    --light-bg: #f5f5f5;
    --white: #ffffff;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--light-bg);
    color: var(--text-color);
    padding-top: 60px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

h1 {
    color: var(--primary-color);
    text-align: center;
    font-size: 2.5em;
    margin-top: 0;
    margin-bottom: 30px;
}

.content {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}


h2 {
    color: var(--primary-color);
    font-size: 1.8em;
    margin: 40px 0 20px 0;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

h2:first-of-type {
    margin-top: 0;
}

/* Present for screen readers and search engines, but not shown.
   Used where the heading only repeats the navigation label. */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}