/* BASE */
html, body {
    background-color: white;
    overscroll-behavior: none;
}

body {
    font-family: system-ui, sans-serif;
    margin: 0 0 50px 0;
    background-color: white;
    min-height: 100%;
    padding: 0;
}

/* STICKY HEADER */
#sticky-header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

/* NAVIGATION */
#banner {
    width: 100%;
    height: auto;
    padding: 12.5px 0;
    box-sizing: border-box;
    background-color: #004aad;
    text-align: right;
}

#banner a {
    color: white;
    text-decoration: none;
}

#banner-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: right;
    text-align: right;
    padding-right: 15px;
    row-gap: 5px;
    column-gap: 20px;
    white-space: nowrap;
}

#banner-content a:not(.dropdown-content a) {
    padding: 0 5px 3px;
}

#banner-content a:hover:not(.dropdown-content a) {
    background-color: #0d358a;
}

/* Current page highlight (top-level links + dropdown triggers) */
#banner > div > a.current,
#banner-content > a.current,
#banner .dropbtn.current {
    background-color: #0d358a;
    padding: 0 5px 3px;
    box-sizing: border-box;
}

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

.dropbtn {
    font: 16px system-ui, sans-serif;
    color: white;
    background-color: #004aad;
    border: none;
    outline: none;
    padding: 0 5px 3px;
    margin: 0;
    cursor: pointer;
}

.dropdown:hover > .dropbtn {
    background-color: #0d358a;
}

.dropdown-content {
    display: none;
    position: absolute;
    min-width: 160px;
    background-color: #004aad;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    text-align: left;
    z-index: 1;
}

.dropdown:hover > .dropdown-content {
    display: block;
}

.dropdown-content a {
    display: block;
    padding: 12px 16px;
    color: white;
    text-decoration: none;
}

.dropdown-content a:hover {
    background-color: #0d358a;
}

.dropdown-content a.current {
    background-color: #0d358a;
}

/* Nested dropdown (submenu) */
.dropdown-content .dropdown {
    display: block;
    width: 100%;
}

.dropdown-content .dropbtn {
    display: block;
    width: 100%;
    text-align: left;
    padding: 12px 16px;
    font-size: inherit;
    background-color: transparent;
}

.dropdown-content .dropdown:hover > .dropbtn {
    background-color: #0d358a;
}

.dropdown-content .dropdown-content {
    top: -1px;
    right: 100%;
    box-shadow: 4px 4px 8px rgba(0, 0, 0, 0.2);
    z-index: 2;
}

/* ANNOUCEMENT BANNER */
#announcement-banner {
    width: 100%;
    padding: 7.5px;
    box-sizing: border-box;
    background-color: rgb(224, 57, 57);
    text-align: center;
    font-weight: bold; /* comment this line for non-boldface */
}

#announcement-banner:empty {
    display: none;
    height: 0;
}

/* TYPOGRAPHY */
#main-title {
    color: #004aad;
    text-align: center;
    padding-top: 25px;
}

.section-titles {
    text-align: center;
    break-before: column;
    font-size: 1.25em;
}

.center-text {
    text-align: center;
}

/* GRID */
.grid-container {
    align-items: start;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 358px));
    justify-content: center;
    padding: 0 35px;
    gap: 30px;
    max-width: 1130px;
    margin: 0 auto;
}

.bottom-row {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    gap: 30px;
    align-items: flex-start;
}

.bottom-row .exam-boxes {
    width: 358px;
}

.main-text {
    margin: 0 35px;
    padding: 0 35px;
}

.center-button {
    display: flex;
    justify-content: center;
    padding-top: 20px;
}

/* ─── MOBILE (max-width: 768px) ─────────────────────── */
@media (max-width: 768px) {
    body > *:not(#sticky-header) {
        padding-left: 30px;
        padding-right: 30px;
        box-sizing: border-box;
    }

    /* TYPOGRAPHY */
    #main-title {
        padding-top: 30px;
        font-size: 1.4em;
    }
 
    .section-titles {
        font-size: 1.1em;
    }
 
    /* LAYOUT — collapse all grids to single column */
    .grid-container {
        grid-template-columns: 1fr;
        justify-content: stretch;
    }

    .bottom-row {
        flex-direction: column;
        align-items: stretch;
    }

    .bottom-row .exam-boxes {
        width: auto;
    }
 
    .main-text {
        margin: 0 30px;
        padding: 0;
    }
 
    /* NAV BANNER */
    #banner-content {
        justify-content: flex-start;
        padding-right: 10px;
        padding-left: 10px;
        white-space: normal;     /* allow wrapping */
        column-gap: 12px;
    }
}