/* Configurações básicas e reset */
:root {
    /* Cores do TEMA CLARO (Padrão) */
    --color-bg-page: #f0f4f7;
    --color-bg-navbar: #d1f4ed;
    --color-bg-card: #ffffff;
    --color-bg-card-darker: #f7f7f7;
    --color-bg-primary-dark: #37475A;
    --color-bg-table-row: #55687a;
    
    --color-text-primary: #37475A; /* Cor de texto principal ESCURA (preto/azul escuro) */
    --color-text-secondary: #666666;
    --color-text-light: #f4f4f4;
    --color-highlight: #57A4A2;
    --color-button-primary: #ff6f61;
    --color-auth-bg: #b0e0d6;
}

/* DARK MODE VARIABLES */
body.dark-mode {
    --color-bg-page: #1e1e1e;
    --color-bg-navbar: #333333;
    --color-bg-card: #282828;
    --color-bg-card-darker: #333333;
    --color-bg-primary-dark: #3a3a3a;
    --color-bg-table-row: #4a4a4a; 

    --color-text-primary: #f4f4f4; /* Cor de texto principal CLARA (branco/off-white) */
    --color-text-secondary: #b0c0cf;
    --color-text-light: #1e1e1e; 
    --color-highlight: #4cb6ac; 
    --color-button-primary: #ff8c7a;
    --color-auth-bg: #282828; 
}


/* --- APLICAÇÃO GERAL DAS VARIÁVEIS --- */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: var(--color-bg-page);
    color: var(--color-text-primary); /* Aplica a cor do texto base */
    transition: background-color 0.3s, color 0.3s;
}

/* Garante que links (a) sem classe específica usem a cor primária ou secundária */
a {
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color 0.3s;
}
a:hover {
    color: var(--color-highlight);
}

/* Garante que o texto de todos os links na navbar fique visível */
.navbar a {
    color: var(--color-text-primary);
}

/* Garante que os ícones (que são links ou botões) fiquem visíveis */
.nav-icons i, .theme-toggle-btn {
    color: var(--color-text-primary);
}


/* --- INPUTS E SELECTS DE FILTRO (Materiais, Simulados, Favoritos) --- */
.filter-bar input, 
.filter-bar select, 
.filter-bar .search-button, 
.inbox-search-bar input {
    color: var(--color-text-primary);
    background-color: var(--color-bg-card-darker);
    border: 1px solid var(--color-text-secondary); 
}
body.dark-mode .filter-bar input::placeholder,
body.dark-mode .inbox-search-bar input::placeholder {
    color: var(--color-text-secondary);
}
body.dark-mode .filter-bar .search-button {
    background-color: var(--color-bg-primary-dark);
}
body.dark-mode .filter-bar .search-button i {
    color: var(--color-text-primary);
}


/* --- NAVBAR DE CONTEÚDO (LOGADO) --- */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background-color: var(--color-bg-navbar); 
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.logo {
    font-size: 24px;
    font-weight: bold;
    background-color: var(--color-highlight);
    color: var(--color-text-light);
    padding: 5px 10px;
    border-radius: 5px;
}

.navbar nav ul {
    list-style: none;
    display: flex;
}

.navbar nav ul li {
    margin: 0 15px;
    padding-bottom: 5px; 
}

.navbar nav ul li a {
    text-decoration: none;
    color: var(--color-text-primary);
    font-size: 16px;
    transition: color 0.3s;
}

.navbar nav ul li.active-in-page {
    border-bottom: 3px solid var(--color-highlight);
    font-weight: bold;
}

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

.nav-icons i {
    font-size: 24px;
    margin-left: 20px;
    cursor: pointer;
    color: var(--color-text-primary);
    transition: color 0.3s;
}

.nav-icons a.active-icon i {
    color: var(--color-highlight);
}

.theme-toggle-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 24px;
    margin-left: 15px;
    color: var(--color-text-primary);
}


/* --- LAYOUT DE PÁGINAS GERAIS --- */
.content-page {
    padding: 30px;
    min-height: calc(100vh - 80px); 
}

.content-card {
    background-color: var(--color-bg-card);
    border-radius: 15px;
    padding: 25px 30px;
    max-width: 1200px;
    margin: 0 auto;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    color: var(--color-text-primary);
}

/* CORREÇÃO DE ESPECIFICIDADE: Força o branco em elementos internos no content-card */
body.dark-mode .content-card *,
body.dark-mode .content-card {
    color: var(--color-text-primary);
}
body.dark-mode .content-card a {
    color: var(--color-text-primary);
}
body.dark-mode .content-card a:hover {
    color: var(--color-highlight);
}
body.dark-mode .content-card h2,
body.dark-mode .content-card h3,
body.dark-mode .content-card h4,
body.dark-mode .content-card .list-item small,
body.dark-mode .content-card .timestamp {
    color: var(--color-text-secondary);
}
body.dark-mode .content-card h2 {
    color: var(--color-highlight);
}

/* --- BANNER DE DESTAQUE DA DASHBOARD --- */
.banner-destaque {
    background-color: var(--color-bg-primary-dark);
    color: var(--color-text-light);
    padding: 30px 0;
}
.banner-destaque a { /* Garante link visível no banner */
    color: var(--color-text-light); 
}
.recursos-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr); 
    gap: 30px;
    padding: 40px 30px;
    max-width: 1200px;
    margin: 0 auto;
}
/* CORREÇÃO FINAL DA DASHBOARD FORÇADA: Garante que o texto nos cards seja branco */
body.dark-mode .recursos-grid .card,
body.dark-mode .recursos-grid .card *,
body.dark-mode .recursos-grid .card i {
    color: var(--color-text-light) !important; 
}
.card {
    background-color: var(--color-bg-primary-dark);
    color: var(--color-text-light); 
    height: 200px; 
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
}
.info-saeb h2 {
    font-size: 1.8em;
    margin-bottom: 15px;
}
.btn-estudo {
    display: inline-block;
    background-color: var(--color-highlight);
    color: var(--color-text-light);
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
}

/* --- PÁGINAS DE AUTENTICAÇÃO (LOGIN/CADASTRO) --- */
.auth-body {
    background-color: var(--color-auth-bg); 
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.auth-form-card {
    background-color: var(--color-bg-primary-dark);
    color: var(--color-text-light); /* Texto do card deve ser CLARO */
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
    text-align: center;
}

/* Força todo o texto dentro do form de autenticação a ser branco no dark mode */
body.dark-mode .auth-form-card *,
body.dark-mode .auth-form-card {
    color: var(--color-text-primary);
}

.auth-form-card input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: none;
    border-radius: 8px;
    background-color: var(--color-bg-card); /* Fundo branco/claro */
    color: var(--color-text-primary); /* Texto do input: claro no dark mode, escuro no light mode */
}
body.dark-mode .auth-form-card input {
    background-color: var(--color-bg-card-darker);
}
body.dark-mode .auth-form-card input::placeholder {
    color: var(--color-text-secondary); /* Placeholder deve ser visível (um cinza claro) */
}


.btn-auth {
    background-color: var(--color-button-primary); 
    color: var(--color-text-light);
    border: none;
    padding: 12px 25px;
    border-radius: 30px;
    cursor: pointer;
    font-weight: bold;
    width: 100%;
}

/* --- LAYOUT DA LANDING PAGE (PONTO DE ENTRADA) --- */
.landing-body {
    background-color: var(--color-bg-page);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.landing-header {
    background-color: var(--color-bg-navbar);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.landing-auth-buttons {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-landing {
    background-color: var(--color-highlight);
    color: var(--color-text-light);
    border: none;
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s;
}

.hero-section {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 30px;
}

.hero-content {
    max-width: 800px;
}

.hero-content h1 {
    font-size: 3em;
    color: var(--color-highlight);
    margin-bottom: 15px;
}

.hero-content p {
    font-size: 1.2em;
    color: var(--color-text-secondary);
    margin-bottom: 30px;
}

/* --- BOTÕES DE MATÉRIA (Aulas Extras/Nivelamento) --- */
.materia-buttons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 15px;
}
/* Garante que o texto nos botões de matéria seja claro */
.materia-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
    background-color: var(--color-bg-card-darker);
    color: var(--color-text-primary); 
    border-radius: 10px;
    text-decoration: none;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: transform 0.2s;
}

.materia-btn i {
    color: var(--color-highlight);
    font-size: 30px;
    margin-bottom: 10px;
}

/* --- PERFIL DO USUÁRIO --- */
.profile-container {
    display: flex;
    gap: 30px;
}

.profile-info-section {
    flex: 1; 
    min-width: 280px;
    border-right: 1px solid var(--color-bg-card-darker);
    padding-right: 30px;
    text-align: center;
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background-color: var(--color-bg-primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
}

.profile-avatar i {
    color: var(--color-text-light);
    font-size: 60px;
}

.profile-details h3 {
    margin-bottom: 5px;
    color: var(--color-highlight);
}

.profile-details a { /* Garante que o link de editar perfil fique claro */
    color: var(--color-highlight) !important; 
}


.profile-content-section {
    flex: 2; 
}

.profile-list-group {
    margin-bottom: 25px;
    background-color: var(--color-bg-card-darker);
    border-radius: 10px;
    padding: 15px;
    border: 1px solid var(--color-bg-primary-dark);
    color: var(--color-text-primary); /* Garante que o texto do grupo de lista seja claro */
}

.profile-list-group h4 {
    border-bottom: 1px solid var(--color-bg-primary-dark);
    padding-bottom: 10px;
    margin-bottom: 15px;
    color: var(--color-text-primary);
}

.list-item {
    background-color: var(--color-bg-primary-dark);
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 8px;
    color: var(--color-text-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.list-item small {
    display: block;
    color: var(--color-text-secondary);
}

.btn-show-more {
    background-color: var(--color-highlight); 
    color: var(--color-text-light);
    border: none;
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 12px;
    font-weight: bold;
}

/* --- CAIXA DE ENTRADA --- */
.inbox-container {
    padding: 0;
    overflow: hidden; 
}

.inbox-search-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background-color: var(--color-bg-card); 
    border-bottom: 1px solid var(--color-bg-card-darker);
}

.inbox-layout {
    display: flex;
    min-height: 500px;
}

.inbox-sidebar {
    flex: 0 0 250px; 
    background-color: var(--color-bg-card-darker);
    border-right: 1px solid var(--color-bg-card-darker);
    padding: 20px 0;
}

.sidebar-item {
    display: block;
    padding: 10px 30px;
    text-decoration: none;
    color: var(--color-text-primary);
    font-weight: bold;
    transition: background-color 0.2s;
}

.sidebar-item.active {
    background-color: var(--color-bg-card);
    border-right: 3px solid var(--color-highlight);
    color: var(--color-highlight);
}

.inbox-list {
    flex: 1;
    background-color: var(--color-bg-card);
    overflow-y: auto;
}

.inbox-message {
    display: flex;
    padding: 15px 30px;
    border-bottom: 1px solid var(--color-bg-card-darker);
    text-decoration: none;
    color: var(--color-text-primary);
    align-items: center;
    transition: background-color 0.2s;
}

.inbox-message:hover {
    background-color: var(--color-bg-card-darker);
}

.inbox-message.new-message {
    font-weight: bold;
    background-color: var(--color-bg-card-darker); 
}

.message-content {
    flex-grow: 1;
}

.timestamp {
    font-size: 12px;
    color: var(--color-text-secondary);
    min-width: 60px;
    text-align: right;
}

/* TABELA DE DADOS */
.list-container-wrapper {
    background-color: var(--color-bg-primary-dark);
    border-radius: 15px;
    padding: 25px 30px;
    max-width: 1200px;
    margin: 25px auto 0;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    color: var(--color-text-light);
}
.list-container-wrapper p { /* Garante que parágrafos internos fiquem claros */
    color: var(--color-text-light);
}

.data-table table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0 10px; 
}

.data-table th {
    text-align: left;
    padding: 10px 15px;
    font-weight: bold;
    color: var(--color-highlight); 
}

.data-table td {
    background-color: var(--color-bg-table-row);
    padding: 15px;
    border: none;
    vertical-align: middle;
    border-radius: 8px;
    /* Garante que o texto nas células da tabela seja claro */
    color: var(--color-text-light);
}
.data-table td a { /* Garante que links em tabelas também sejam claros */
    color: var(--color-text-light);
}