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

body {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 15px;
    line-height: 1.7;
    background-color: #ffffff;
    color: #1a1a1a;
    transition: background-color 0.2s ease, color 0.2s ease;
}

main {
    display: flex;
    justify-content: center;
    padding: 60px 20px;
    min-height: 100vh;
}

.container {
    max-width: 720px;
    width: 100%;
}

.logo {
    margin-bottom: 48px;
}

.logo svg {
    display: block;
}

.greeting {
    font-size: 16px;
    margin-bottom: 32px;
}

p {
    margin-bottom: 24px;
}

ul {
    margin-bottom: 24px;
    margin-left: 20px;
}

li {
    margin-bottom: 12px;
}

hr {
    border: none;
    border-top: 1px solid #e0e0e0;
    margin: 48px 0;
    transition: border-color 0.2s ease;
}

a {
    color: inherit;
    text-decoration: underline;
    text-decoration-color: rgba(0, 0, 0, 0.3);
    text-underline-offset: 2px;
    transition: text-decoration-color 0.2s ease;
}

a:hover {
    text-decoration-color: rgba(0, 0, 0, 0.7);
}

#toggle-mode {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 8px 14px;
    font-family: inherit;
    font-size: 12px;
    background-color: #f5f5f5;
    color: #1a1a1a;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    z-index: 100;
}

#toggle-mode:hover {
    background-color: #ebebeb;
}

/* Dark mode styles */
body.dark-mode {
    background-color: #0d0d0d;
    color: #e8e8e8;
}

body.dark-mode hr {
    border-top-color: #2a2a2a;
}

body.dark-mode a {
    text-decoration-color: rgba(255, 255, 255, 0.3);
}

body.dark-mode a:hover {
    text-decoration-color: rgba(255, 255, 255, 0.7);
}

body.dark-mode #toggle-mode {
    background-color: #1a1a1a;
    color: #e8e8e8;
    border-color: #2a2a2a;
}

body.dark-mode #toggle-mode:hover {
    background-color: #242424;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }

    main {
        padding: 40px 24px;
    }

    .logo {
        margin-bottom: 36px;
    }

    .greeting {
        margin-bottom: 28px;
    }

    p {
        margin-bottom: 20px;
    }

    hr {
        margin: 40px 0;
    }

    #toggle-mode {
        bottom: 16px;
        right: 16px;
        font-size: 11px;
        padding: 7px 12px;
    }
}