body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #f5f7f9;
    color: #333;
    margin: 0;
}

main.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

input, textarea, button {
    padding: 8px;
    margin-bottom: 12px;
    width: 100%;
    box-sizing: border-box;
}

form {
    background-color: #ffffff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

h1, h2 {
    text-align: center;
    color: #2c3e50;
}

a {
    color: #2980b9;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
    background-color: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.navbar-nav .nav-link.active {
    background-color: rgba(255, 255, 255, 0.3);
    color: #fff;
}