/* RESET */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* BASE */
html, body {
    height: 100%;
}

body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: #f9f9f9;
    color: #333;
    display: flex;
    flex-direction: column;
}

/* HEADER */
header {
    background-color: #005bbb;
    color: #fff;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

header h1 {
    font-size: clamp(1.2rem, 2.5vw, 2rem); /* responsivo */
}

/* NAV */
nav {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

nav a,
nav form button {
    color: white;
    text-decoration: none;
    font-weight: bold;
    background: none;
    border: none;
    padding: 0;
    margin: 0;
    font: inherit;
    cursor: pointer;
    transition: color 0.3s;
}

nav a:hover,
nav form button:hover {
    color: #dbeeff;
}

/* MAIN */
main {
    flex: 1;
    padding: 2rem;
    max-width: 960px;
    margin: 0 auto;
}

/* FOOTER */
footer {
    background-color: #222;
    color: #aaa;
    text-align: center;
    padding: 1rem;
    font-size: 0.875rem;
}

/* FORM PADRÃO */
form {
    max-width: 500px;
    margin: 2rem auto;
}

form input,
form select,
form textarea,
form button {
    display: block;
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}

form button {
    background-color: #005bbb;
    color: white;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

form button:hover {
    background-color: #004494;
}

/* RESPONSIVO - telas menores que 768px */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem;
    }

    nav {
        flex-direction: column;
        gap: 0.5rem;
        width: 100%;
    }

    nav a,
    nav form button {
        width: fit-content;
    }

    main {
        padding: 1rem;
    }
}