/* Dark mode (default) */
body {
    font-family: 'Times New Roman', Times, serif;
    background-color: #1a1a1a;
    color: #e0e0e0;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 500px;
    margin: 0 auto;
    padding: 0 10px;
    text-align: left;
    padding: 20px 10px;
}

p {
    margin-bottom: 1.2em;
}

h1 {
    font-size: medium;
}

a {
    color: #66b3ff;
    text-decoration: underline;
    transition: color 0.3s ease;
}

a:hover {
    color: #99ccff;
}

.signature {
    margin: 20px 0;
}

.signature-img {
    max-width: 200px;
    height: auto;
    filter: invert(1);
    transition: filter 0.3s ease;
}

.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    font-family: 'Times New Roman', Times, serif;
    font-size: 12px;
    color: #888;
    cursor: pointer;
    transition: color 0.3s ease;
}

.theme-toggle:hover {
    color: #bbb;
}

/* Light mode */
body.light-mode {
    background-color: #ffffff;
    color: #333333;
}

body.light-mode a {
    color: #0066cc;
}

body.light-mode a:hover {
    color: #004499;
}

body.light-mode .signature-img {
    filter: invert(0);
}

body.light-mode .theme-toggle {
    color: #666;
}

body.light-mode .theme-toggle:hover {
    color: #333;
}

body.light-mode .credit {
    color: #666;
}

/* Responsive design */
@media (max-width: 520px) {
    .container {
        margin: 0 10px;
        max-width: none;
    }

    body {
        padding: 20px 0;
    }
}