/* Configurações Gerais e Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    background-color: #0f172a; 
    color: #e2e8f0; 
    padding: 20px;
}

#pagina {
    max-width: 900px;
    margin: 0 auto;
    background: #1e293b; 
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}

/* Cabeçalhos */
header {
    text-align: center;
    border-bottom: 2px solid #38bdf8;
    margin-bottom: 30px;
    padding-bottom: 20px;
}

h1 {
    color: #38bdf8; 
    font-size: 2.2rem;
    margin-bottom: 10px;
}

h2 {
    color: #818cf8;
    border-left: 4px solid #818cf8;
    padding-left: 15px;
    margin: 40px 0 20px;
}

h3 {
    color: #f87171; 
    margin-bottom: 10px;
}

/* Navegação */
nav {
    background: #334155;
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 30px;
    position: sticky;
    top: 10px;
    z-index: 100;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
}

nav a {
    color: #cbd5e1;
    text-decoration: none;
    font-weight: bold;
    font-size: 0.9rem;
    transition: color 0.3s;
}

nav a:hover {
    color: #38bdf8;
}

/* Blocos de Conteúdo */
article {
    background: #1e293b;
    border: 1px solid #334155;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    transition: transform 0.2s;
}

article:hover {
    transform: translateY(-5px);
    border-color: #475569;
}

aside {
    background: #4338ca;
    color: white;
    padding: 15px;
    border-radius: 6px;
    font-style: italic;
    margin: 10px 0;
}

blockquote {
    border-left: 4px solid #10b981;
    padding: 10px 20px;
    margin: 20px 0;
    background: #064e3b;
    color: #a7f3d0;
}

/* Elementos de Código */
pre, code {
    font-family: 'Fira Code', 'Courier New', monospace;
    background: #000;
    color: #34d399;
    padding: 5px 10px;
    border-radius: 4px;
}

pre {
    padding: 15px;
    overflow-x: auto;
    margin: 15px 0;
    border: 1px solid #334155;
}

/* Tabelas */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 25px 0;
    background: #0f172a;
}

th, td {
    padding: 12px;
    text-align: left;
    border: 1px solid #334155;
}

th {
    background: #38bdf8;
    color: #0f172a;
}

/* Formulários */
fieldset {
    border: 2px solid #475569;
    padding: 20px;
    border-radius: 8px;
    margin-top: 20px;
}

legend {
    padding: 0 10px;
    font-weight: bold;
    color: #38bdf8;
}

label {
    display: block;
    margin-top: 15px;
    font-weight: bold;
}

input, textarea, select {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    background: #0f172a;
    border: 1px solid #334155;
    color: white;
    border-radius: 4px;
}

input[type="submit"] {
    background: #38bdf8;
    color: #0f172a;
    font-weight: bold;
    border: none;
    margin-top: 20px;
    cursor: pointer;
    transition: background 0.3s;
}

input[type="submit"]:hover {
    background: #7dd3fc;
}

/* Rodapé */
footer {
    text-align: center;
    margin-top: 50px;
    padding-top: 20px;
    border-top: 1px solid #334155;
    font-size: 0.85rem;
    color: #94a3b8;
}

address {
    font-style: normal;
    margin-bottom: 10px;
}

/* Interatividade */
details {
    background: #334155;
    padding: 10px;
    border-radius: 5px;
    cursor: pointer;
}

summary {
    font-weight: bold;
    color: #38bdf8;
}