/* Main styles */

:root {
    --color-primary: #61AEEF; /* River Blue */
    --color-accent: #3D8EC9; /* Deep Flow Blue */
    --color-bg-light: #F9FBFD; /* Soft Ice White */
    --color-dark-text: #1F1F1F; /* Graphite Black */
    --color-muted-text: #5A6C78; /* Cool Slate Gray */
    --color-highlight: #DCEEFF; /* Sky Mist */
}


body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-weight: 400;
    font-size: 1.125rem;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: var(--color-dark-text);
    background: var(--color-bg-light);
}

h1,
h2,
h3,
nav a {
    font-weight: 600;
    letter-spacing: 0.3px;
}

/* Layout width control */
main,
footer {
    width: min(90%, 1200px);
    margin-left: auto;
    margin-right: auto;
}


.nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    background: var(--color-primary);
}


.nav li {
    margin: 0 1rem;
}

.nav a {
    color: white;
    text-decoration: none;
    padding: 1rem;
    display: block;
}

.nav a:hover {
    background: var(--color-accent);
}

main {
    padding: 2rem;
}

footer {
    text-align: center;
    padding: 1rem 0;
    background: var(--color-highlight);
}

form {
    display: flex;
    flex-direction: column;
}

form label {
    margin-top: 1rem;
}

form input,
form textarea {
    padding: 0.5rem;
    font-size: 1rem;
}

form button {
    margin-top: 1rem;
    padding: 0.75rem;
    background: var(--color-primary);
    color: white;
    border: none;
    cursor: pointer;
}

form button:hover {
    background: var(--color-accent);
}


@media (min-width: 768px) {
    .nav ul {
        justify-content: flex-end;
        padding-right: 2rem;
    }
}

@media (max-width: 767px) {

    main {
        padding: 1.5rem 1rem;
    }

    .nav ul {
        flex-direction: column;
        align-items: center;
    }

    .nav li {
        margin: 0;
        width: 100%;
    }

    .nav a {
        padding: 0.75rem 1rem;
    }
}