:root {
    --cor-principal: #003a6b;
    --cor-secundaria: #1A73E8;
    --cor-destaque: #EE9B00;
    --cor-fundo: #f5f5f5;
    --cor-texto: #333333;
}

/* Estrutura geral */
body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--cor-fundo);
    color: var(--cor-texto);
    transition: background-color 0.4s ease, color 0.4s ease;
}

section {
    margin-bottom: 30px;
}

header, footer, section, nav, p, h1, h2, h3, h4, h5, h6 {
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* ---------------- HEADER ---------------- */
#header {
    background-color: var(--cor-principal);
}
#header .container {
    background-color: transparent;
}
#header {
    background-color: var(--cor-principal);
}
#header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    padding: 15px 20px;
    background-color: transparent;
}

.logo-area img {
    height: 80px;
    width: auto;
    max-width: 180px;
}

nav {
    display: flex;
    align-items: center;
}

nav ul {
    display: flex;
    gap: 25px;
    list-style: none;
    margin: 0;
    padding: 0;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 18px;
    font-weight: bold;
}

nav ul li a:hover {
    color: var(--cor-destaque);
}

/* ---------------- FOOTER ---------------- */

#footer {
    background: linear-gradient(to right, #003a6b, #005a99);
    color: white;
    text-align: center;
    padding: 28px 0;
    margin-top: 50px;
    font-size: 15px;
    border-top: 2px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.15);
}

#footer .container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
    letter-spacing: 0.4px;
}

/* ---------------- CONTEÚDO ---------------- */

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    font-size: 32px;
    font-weight: 600;
    color: var(--cor-principal);
    margin-bottom: 15px;
}

h2 {
    font-size: 26px;
    font-weight: 400;
    color: var(--cor-secundaria);
    margin-top: -10px;
    margin-bottom: 20px;
}

h3 {
    font-size: 20px;
    font-weight: 500;
    color: var(--cor-texto);
    margin-top: 20px;
    margin-bottom: 8px;
}

h3::before {
    content: "• ";
    color: var(--cor-secundaria);
}

p {
    line-height: 1.6;
    margin-bottom: 15px;
}

.botao-voltar {
    display: inline-block;
    background-color: var(--cor-secundaria);
    color: white;
    padding: 10px 18px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    margin-top: 10px;
}

.botao-voltar:hover {
    background-color: var(--cor-destaque);
}

/* ---------------- SWITCH DE TEMA ---------------- */

.tema-container {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.tema-label {
    font-size: 14px;
    font-weight: bold;
}

.switch {
    position: relative;
    width: 50px;
    height: 26px;
    display: inline-block;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    background-color: #ccc;
    border-radius: 34px;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    transition: 0.4s;
}

/* Corrigido: faltava o ponto antes de slider::after */
.slider:before,
.slider::after {
    position: absolute;
    font-size: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: white;
    pointer-events: none;
}

.slider:before {
    content: "🌙";
    left: 6px;
}

.slider::after {
    content: "☀️";
    right: 6px;
}

input:checked + .slider {
    background-color: #004a7a;
}

input:checked + .slider:before {
    transform: translateX(24px);
}

/* ---------------- TEMA ESCURO ---------------- */

.dark-mode {
    background-color: #1a1a1a;
    color: #f1f1f1;
}

.dark-mode #header {
    background-color: #0d1b2a;
}

.dark-mode #footer {
    background: linear-gradient(to right, #002a4d, #004a7a);
}

.dark-mode .slider {
    background-color: #1f6f8b;
}

.dark-mode input:checked + .slider {
    background-color: #2e8ab3;
}