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

/* ============ My Dark (default) ============ */
:root {
    --bg-body: #1a1a1a;
    --bg-hd: #2d2d2d;
    --text-hi: #fff;
    --shadow: rgba(0, 0, 0, 0.3);
    color-scheme: dark;
}

/* ============ My Light (parchment, matches help files) ============ */
html[data-theme="light"] {
    --bg-body: #FFFEE0;
    --bg-hd: #F4E6AB;
    --text-hi: #000;
    --shadow: rgba(0, 0, 0, 0.15);
    color-scheme: light;
}

body {
    font-family: Verdana, Arial, sans-serif;
    background: var(--bg-body);
    color: var(--text-hi);
    padding: 20px;
    min-height: 100vh;
}

.page-header {
    background: var(--bg-hd);
    color: var(--text-hi);
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 1.5rem;
    font-weight: bold;
    text-align: center;
}

.image-container {
    text-align: center;
    margin-bottom: 20px;
}

.image-container img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 8px var(--shadow);
}