/* style.css - DNA Visual LexLearn */
:root {
    --bg-dark: #0d1117;
    --bg-card: #161b22;
    --accent: #58a6ff;
    --accent-glow: rgba(88, 166, 255, 0.2);
    --text-main: #c9d1d9;
    --text-muted: #8b949e;
    --border: #30363d;
    --font-main: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Navbar */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    background: rgba(13, 17, 23, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo { font-size: 1.5rem; font-weight: 800; color: var(--accent); letter-spacing: -1px; }

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 25px;
    font-size: 0.95rem;
    transition: 0.3s;
}

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

.btn-login {
    background: var(--accent);
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 6px;
    font-weight: 600;
}

/* Rodapé */
footer {
    margin-top: auto;
    padding: 40px 5%;
    background: #090c10;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-links { margin-bottom: 20px; }
.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin: 0 15px;
    font-size: 0.85rem;
}

.footer-links a:hover { color: var(--accent); }

.copy { font-size: 0.8rem; color: #484f58; }

/* Utilitários */
.container { max-width: 1200px; margin: 0 auto; padding: 60px 20px; }
.section-title { text-align: center; font-size: 2.5rem; margin-bottom: 40px; color: #fff; }