/* Variáveis CSS para cores */
:root {
    --background-color-light: #f4f4f4;
    --text-color-light: #333;
    --container-bg-light: #fff;
    --container-border-light: #ddd;
    --heading-color-light: #555;
    --link-color-light: #007bff;

    --background-color-dark: #282c36;
    --text-color-dark: #f0f0f0;
    --container-bg-dark: #3c4048;
    --container-border-dark: #555;
    --heading-color-dark: #e0e0e0;
    --link-color-dark: #8ab4f8; /* Um azul mais claro para o modo escuro */
}

/* Estilos padrão (para o tema claro) */
body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    transition: background-color 0.3s, color 0.3s; /* Transição suave */
    background-color: var(--background-color-light);
    color: var(--text-color-light);
}
.container {
    text-align: center;
    padding: 40px;
    border: 1px solid var(--container-border-light);
    border-radius: 8px;
    background-color: var(--container-bg-light);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s, border-color 0.3s, box-shadow 0.3s; /* Transição suave */
}
h1 {
    color: var(--heading-color-light);
    transition: color 0.3s; /* Transição suave */
}
p {
    margin-top: 20px;
    font-size: 1.1em;
}
.link {
    margin-top: 30px;
}
.link a {
    color: var(--link-color-light);
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s; /* Transição suave */
}
.link a:hover {
    text-decoration: underline;
}
.theme-toggle-button {
    background: none;
    border: none;
    font-size: 1.5em;
    cursor: pointer;
    position: absolute;
    top: 20px;
    right: 20px;
    color: var(--text-color-light); /* Cor do ícone */
    transition: color 0.3s;
    padding: 0;
}


/* Estilos para quando a classe 'dark-mode' é ativada (pelo botão) */
body.dark-mode {
    background-color: var(--background-color-dark);
    color: var(--text-color-dark);
}
body.dark-mode .container {
    background-color: var(--container-bg-dark);
    border-color: var(--container-border-dark);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}
body.dark-mode h1 {
    color: var(--heading-color-dark);
}
body.dark-mode .link a {
    color: var(--link-color-dark);
}
body.dark-mode .theme-toggle-button {
    color: var(--text-color-dark);
}