.cards-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
}

:root {
    --blue-dark: #0a1f44;
    --blue: #2f5f98;
    --blue-light: #4d7db8;

    --gray-dark: #2d343c;
    --gray: #5f6b76;
    --gray-light: #e8edf2;

    --white: #ffffff;

    --max-width: 100%;
    --sidebar-width: 260px;
    --gap: 1.5rem;
}

* {
    box-sizing: border-box;
}


body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--gray-light);
    color: var(--gray-dark);
    line-height: 1.6;
    padding-bottom: 60px;
}

a {
    color: var(--blue);
    text-decoration: none;
}

a:hover {
    color: var(--blue-light);
}

header {
    background: var(--blue-dark);
    color: var(--white);
    padding: 0.5rem;
    border-bottom: 4px solid var(--blue-light);
    margin-bottom: 10px
}

header h1 {
    margin: 0;
    font-size: 2rem;
}

header h1 a {
    color: white;
}


header h2  {
    color: white;
}

header p {
    margin: 0.5rem 0 0;
    color: #d5e2f0;
}

.container {
    width: 100%;

    display: grid;

    grid-template-columns:
        minmax(220px, 18%)
        minmax(0, 1fr)
        minmax(220px, 18%);

    gap: 1rem;

    padding: 1rem 2rem;
}


.sidebar,
.rightbar,
.content {
    background: var(--white);
    border-radius: 10px;
    padding: 1.25rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.sidebar h2,
.rightbar h2 {
    margin-top: 0;
    color: var(--blue-dark);
    font-size: 1.1rem;
    border-bottom: 2px solid var(--gray-light);
    padding-bottom: 0.5rem;
}

.content h1,
.content h2,
.content h3 {
    color: white //var(--blue-dark);
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

nav li {
    margin-bottom: 0.75rem;
}

.card {
    background: var(--gray-light);
    border-left: 4px solid var(--blue);
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 6px;
}
/*
footer {
    padding: 15px;
    text-align: center;
    background: var(--blue-dark);
    color: #fff;
}
*/

footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;

    padding: 1rem;
    text-align: center;

    background: var(--gray-dark);
    color: #cfd7df;

    z-index: 1000;
}

/* TABLET */
@media (max-width: 1024px) {

    .container {
        grid-template-columns: 220px 1fr;
    }

    .rightbar {
        grid-column: 1 / -1;
    }
}

/* MOBILE */
@media (max-width: 768px) {

    .container {
        grid-template-columns: 1fr;
    }

    header {
        text-align: center;
    }
}