/* =============================================
   HEADER
   Barra de navegação fixa no topo.
   ============================================= */

.header {
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    background: var(--color-bg);
    z-index: var(--z-sticky);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.header-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
}

.header-logo-icon {
    width: 40px;
    height: 40px;
}

.header-logo-text {
    font-family: var(--font-brand);
    font-size: var(--text-xl);
    line-height: 1.1;
}

.header-logo-text .selo {
    color: var(--color-dark);
}

.header-logo-text .eletronico {
    color: var(--color-accent);
}

/* Navegação */
.header-nav {
    display: flex;
    align-items: center;
    gap: var(--space-3xl);
}

.header-nav a {
    color: var(--color-text);
    text-decoration: none;
    font-size: var(--text-base);
    font-weight: 500;
    transition: color var(--transition-base);
}

.header-nav a:hover,
.header-nav a:focus {
    color: var(--color-accent);
}