body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
    color: #222;
    background: #fff;
}

/* NAVBAR */
nav {
    background: #333;
    padding: 12px 20px;
    display: flex;
    gap: 20px;
}

nav a {
    color: white;
    text-decoration: none;
    font-size: 14px;
}

nav a:hover {
    text-decoration: underline;
}

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

/* HEADINGS */
h1 {
    margin-bottom: 25px;
}

h2 {
    font-size: 20px;
    margin-bottom: 12px;
    color: #333;
}

/* SECTIONS */
section {
    padding: 20px 0;
    border-bottom: 1px solid #e5e5e5;
}

/* GCSE reusable blocks */
.block {
    margin-top: 10px;
    font-size: 15px;
}

.label {
    font-weight: bold;
    display: block;
    margin-bottom: 4px;
}

/* A LEVEL topics */
.topic-group {
    display: grid;
    gap: 6px;
    margin-top: 10px;
}

.topic {
    color: #444;
    font-size: 15px;
}

/* LINKS */
a {
    color: #1a73e8;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}




.Fimage {
    max-width: 700px;
    width: 110%;
    height: auto;
    display: block;
    margin: 30px auto 0;
}