html {
    height: 100%;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100%;
    align-items: center;
    background-color: #efeceb;
    color: #333;
}

/* Standard Layout */
main {
    flex: 1;
    width: 100%;
    max-width: 640px;
    margin: 0 auto;
    padding: 32px 24px 40px;
    box-sizing: border-box;
}

/* Standard Typography */
h1 { margin-top: 0; color: #4A4A4A; font-size: 1.75rem; }
h2 { color: #5A5A5A; margin-top: 30px; margin-bottom: 12px; font-size: 1.15rem; }
p, ul { line-height: 1.7; font-size: 1rem; }
ul { padding-left: 20px; margin-top: 0; }
li { margin-bottom: 8px; }

/* Standard Links */
.back-link {
    display: inline-block;
    margin-top: 30px;
    color: #6f4e37;
    text-decoration: none;
    font-weight: 600;
    transition: opacity 0.2s ease;
}
.back-link:hover {
    opacity: 0.8;
}

/* Header Logo */
.header-logo {
    display: block;
    max-width: 640px;
    width: 100%;
    margin: 10px auto 5px auto;
    border-radius: 12px;
    border: 1px solid #cec6c5;
    box-sizing: border-box;
}

/* Footer Styles */
footer {
    padding: 32px 20px 24px;
    text-align: center;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-sizing: border-box;
}
.footer-link a {
    color: #6F4E37;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: opacity 0.2s ease;
}
.footer-link a:hover {
    opacity: 0.8;
}
.footer-copyright {
    font-size: 0.8rem;
    color: #999;
}