/* style.css */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #333;
    background-color: #ffffff;
}

header, footer {
    background-color: #f8f9fa;
    padding: 1rem;
    text-align: center;
    border-bottom: 1px solid #eaeaea;
}

header h1 {
    margin: 0;
    color: #1a365d;
    font-size: 1.8rem;
}

nav a {
    text-decoration: none;
    color: #2b6cb0;
    margin: 0 0.8rem;
    font-weight: 600;
}

nav a:hover, nav a[aria-current="page"] {
    color: #1a365d;
    text-decoration: underline;
}

main {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

h2 {
    color: #1a365d;
    margin-top: 0;
}

h3 {
    color: #2c5282;
    margin-top: 1.5rem;
}

form div {
    margin-bottom: 0.75rem;
}

label {
    display: block;
    margin-bottom: 0.3rem;
    font-weight: 600;
}

input[type="text"],
input[type="email"],
textarea {
    width: 100%;
    padding: 0.6rem;
    border: 1px solid #cbd5e0;
    border-radius: 6px;
    font-size: 1rem;
}

input[type="submit"] {
    background-color: #2b6cb0;
    color: white;
    padding: 0.7rem 1.5rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: background 0.2s;
}

input[type="submit"]:hover {
    background-color: #1a365d;
}

.alert {
    padding: 0.75rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
}

.alert.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

footer p {
    margin: 0.5rem 0;
    color: #718096;
    font-size: 0.9rem;
}

hr {
    border: 0;
    border-top: 1px solid #e2e8f0;
    margin: 1.2rem 0;
}

@media (max-width: 600px) {
    nav a {
        display: inline-block;
        margin: 0.4rem 0.6rem;
    }

    header h1 {
        font-size: 1.4rem;
    }
}