body {
    background-color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
}

/* Navbar */
.navbar {
    background-color: #343a40; /* fundo escuro */
    padding: 0.8rem 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.navbar-brand {
    color: #f8f9fa; /* branco clarinho */
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

.navbar-brand:hover,
.navbar-brand:focus {
    color: #17a2b8; 
    text-decoration: none;
}

.navbar-nav .nav-link {
    color: white;
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
    color: #17a2b8;
    text-decoration: underline;
}

.btn-outline-light {
    color: white;
    border-color: white;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.btn-outline-light:hover,
.btn-outline-light:focus {
    background-color: white;
    color: #343a40;
    border-color: white;
}

/* Card */
.card {
    border: none;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
    min-height: 100%;
    border-radius: 0.5rem;
    background-color: white;
}

/* Botão escuro */
.btn-dark {
    background-color: #343a40;
    border-color: #343a40;
    width: 100%;
    transition: background-color 0.3s ease;
}

.btn-dark:hover,
.btn-dark:focus {
    background-color: #495057;
    border-color: #495057;
}