/* Variáveis de Cores (Paleta inspirada no Logo) */
:root {
    --bg-dark: #0b0e11;        /* Fundo principal escuro */
    --panel-bg: #181a20;       /* Fundo dos painéis */
    --primary-blue: #1f3b73;   /* Azul escuro do logo */
    --accent-blue: #3b6bdc;    /* Azul claro/brilhante */
    --text-light: #eaecef;     /* Texto claro */
    --text-muted: #848e9c;     /* Texto secundário */
    --metallic-gray: #2b3139;  /* Cinza metálico */
    --green-up: #0ecb81;       /* Verde para alta */
    --red-down: #f6465d;       /* Vermelho para baixa */
}

/* Reset Básico */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
}

/* Cabeçalho */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 40px;
    background-color: var(--panel-bg);
    border-bottom: 1px solid var(--metallic-gray);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--accent-blue);
}

.user-actions a {
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 600;
    margin-left: 10px;
}

.btn-login {
    color: var(--accent-blue);
}

.btn-register {
    background-color: var(--primary-blue);
    color: #fff;
    background-image: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
}

/* Dashboard Principal */
.dashboard-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    padding: 30px 40px;
    max-width: 1400px;
    margin: 0 auto;
}

/* Tickers (Preços) */
.tickers {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.ticker-card {
    background-color: var(--panel-bg);
    padding: 15px;
    border-radius: 8px;
    flex: 1;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--metallic-gray);
}

.ticker-card span {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 5px;
}

.up { color: var(--green-up); }
.down { color: var(--red-down); }

/* Área do Gráfico */
.main-chart-area {
    background-color: var(--panel-bg);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--metallic-gray);
    height: 450px;
    display: flex;
    flex-direction: column;
}

.main-chart-area h2 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-muted);
}

/* Área onde o gráfico será renderizado */
.chart-placeholder {
    background-color: var(--bg-dark);
    flex: 1;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    border: 1px dashed var(--metallic-gray);
    position: relative; /* Necessário para posicionar a marca d'água */
    overflow: hidden; /* Evita que a imagem vaze da caixa */
}

/* Cria a marca d'água (logo translúcida) no fundo */
.chart-placeholder::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('img/logo_mycriptocoin.png'); /* Usa a mesma imagem do logo */
    background-size: 40%; /* Tamanho da logo de fundo (pode ajustar para 30%, 50%...) */
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.08; /* Nível de transparência (0.08 é bem suave e elegante) */
    z-index: 1; /* Coloca a logo no fundo */
}

/* Garante que o texto (e o futuro gráfico do seu curso) fiquem em cima da logo */
.chart-placeholder p, 
.chart-placeholder canvas /* Preparando para quando colocar o Chart.js ou TradingView */ {
    position: relative;
    z-index: 2;
}

/* Painel de Compra e Venda */
.trading-panel {
    background-color: var(--panel-bg);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--metallic-gray);
}

.trading-panel h3 {
    margin-bottom: 20px;
    font-size: 18px;
}

.trade-tabs {
    display: flex;
    margin-bottom: 20px;
}

.trade-tabs .tab {
    flex: 1;
    padding: 10px;
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--metallic-gray);
    color: var(--text-muted);
    cursor: pointer;
    font-weight: 600;
}

.trade-tabs .tab.active {
    border-bottom-color: var(--accent-blue);
    color: var(--accent-blue);
}

.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-muted);
    font-size: 14px;
}

.input-group input {
    width: 100%;
    padding: 12px;
    background-color: var(--bg-dark);
    border: 1px solid var(--metallic-gray);
    border-radius: 5px;
    color: var(--text-light);
    outline: none;
}

.input-group input:focus {
    border-color: var(--accent-blue);
}

.btn-buy {
    width: 100%;
    padding: 15px;
    margin-top: 10px;
    background-color: var(--green-up);
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    transition: opacity 0.3s;
}

.btn-buy:hover {
    opacity: 0.8;
}

/* Rodapé */
footer {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 40px;
    border-top: 1px solid var(--metallic-gray);
}