/*
==========================================
Track Cycling Calcs
Layout, header, navigation and footer
==========================================
*/

header {
    background: #08458a;
    color: white;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
}

header h1 {
    font-size: 2.5rem;
    margin: 0;
}

.header-logo {
    width: 90px;
    height: auto;
}

nav {
    background: #1862b5;
    display: flex;
    align-items: center;
}

.nav-links {
    display: flex;
    align-items: center;
}

nav a,
.dropbtn {
    color: white;
    text-decoration: none;
    padding: 10px 16px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 20px;
}

nav a:hover,
.dropbtn:hover {
    background: #444;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: max-content;
    min-width: 220px;
    background: white;
    box-shadow: 0 4px 10px rgba(0,0,0,.2);
    z-index: 1000;
}

.dropdown-content a {
    display: block;
    color: #333;
    padding: 12px 16px;
    text-decoration: none;
    font-size: 16px;
    white-space: nowrap;
}

.dropdown-content a:hover {
    background: #f0f0f0;
}

.dropdown:hover .dropdown-content,
.dropdown.active .dropdown-content {
    display: block;
}

.calculator-page .about-link {
    display: none;
}

.menu-toggle {
    display: none;
    color: white;
    font-size: 28px;
    cursor: pointer;
    padding: 10px 16px;
}

main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 15px;
    min-height: calc(100vh - 140px);
}

.page {
    display: flex;
    justify-content: center;
    padding: 40px 20px;
}

footer {
    background: #222;
    color: white;
    text-align: center;
    padding: 15px;
}

@media (max-width: 768px) {

    header {
        display: flex;
        align-items: center;
        justify-content: flex-start;
        padding: 5px;
        gap: 5px;
    }

    header h1 {
        font-size: 2rem;
    }

    nav {
        flex-wrap: wrap;
        background: #ECEFF1;
    }

    .header-logo {
        width: 45px;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background: #333;
    }

    .nav-links.active {
        display: flex;
    }

    .dropbtn {
        display: none;
    }

    .nav-links a {
        width: 100%;
        text-align: left;
        padding: 10px 16px;
    }

    .dropdown {
        width: 100%;
    }

    .dropdown-content {
        display: block;
        position: static;
        width: 100%;
        box-shadow: none;
    }

    .page {
        padding: 15px;
    }
}