*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
:root {
    --color-primary:   #0066cc;
    --color-secondary:#ff6600;
    --color-bg:        #f9f9f9;
    --color-text:      #333333;
    --font-base:       'Helvetica Neue', Arial, sans-serif;
}
html {
    font-size: 100%;
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: #fdfdfd;
}
.site-header {
    background-color: #fcfcfc;
    color: #000;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    margin: 0;
    line-height: 0;
}
.logo-img {
    height: 40px;
}
.logo a:hover .logo-img {
    opacity: 0.85;
    transition: opacity .2s;
}
.global-nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}
.global-nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
}
.global-nav a:hover {
    opacity: 0.8;
}
.link-heading {
    color: #0066cc;
    border-left: 4px solid #0066cc;
    background: #f2f9ff;
    color: var(--color-primary, #0066cc);
    border-left-color: var(--color-primary, #0066cc);
    background: var(--color-bg, #f2f9ff);
    font-size: 1.25rem;
    font-weight: 600;
    padding: 0.4rem 0.8rem;
    margin: 2rem 0 1rem;
}
.link-list {
    margin: 0;
    padding: 0 0 0 1.5rem;
}
.link-list li {
    margin: 0 0 0.5rem 1.5rem;
}
.link-list a {
    display: block;
    padding: 0.6rem 0.9rem;
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.95rem;
    line-height: 1.4;
    color: #333;
    background: #f7f7f7;
    transition: background .2s ease, color .2s ease;
}
.link-list a {
    color: var(--color-text, #333);
    background: var(--color-bg, #f7f7f7);
}
.link-list a:hover,
.link-list a:focus {
    background: #0066cc;
    color: #fff;
    outline: none;
}
.link-list a:hover,
.link-list a:focus {
    background: var(--color-primary, #0066cc);
    color: #fff;
}
.link-list a:focus-visible {
    box-shadow: 0 0 0 3px rgba(0,102,204,.4);
}
.breadcrumb {
    background: #fafafa;
    padding: 0.5rem 2rem;
    font-size: 0.9rem;
}
.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    margin: 0;
    padding: 0;
}
.breadcrumb li + li::before {
    content: ">";
    margin: 0 0.5rem;
    color: #999;
}
.breadcrumb a {
    color: var(--color-primary);
    text-decoration: none;
}
.breadcrumb a:hover {
    text-decoration: underline;
}
.breadcrumb li[aria-current="page"] {
    font-weight: 600;
    color: #222;
}
.site-main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}
section.content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #222;
    border-top: 4px solid #153368;
    padding-top: 0.6rem;
    margin-top: 2rem;
}
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color .2s, opacity .2s;
}
.btn-primary {
    background-color: var(--color-secondary);
    color: #fff;
}
.btn-primary:hover {
    background-color: #e65c00;
}
.btn-secondary {
    background-color: #fff;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}
.btn-secondary:hover {
    background-color: var(--color-primary);
    color: #fff;
}
.grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 2rem;
    align-items: stretch;
}
.card {
    background: #CFDAF0;
    border: 1px solid #ddd;
    border-radius: 6px;
    flex: 1 1 calc(33.333% - 1.5rem);
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.10);
    display: flex;
    flex-direction: column;
    flex: 1 1 calc(33.333% - 1.5rem);
    height: 250px;
    max-width: 32%;
}
.card:hover,
.card:focus-visible {
    transform: scale(1.02);
    box-shadow: 0 8px 20px rgba(0,0,0,.15);
}
.card .btn-secondary {
    margin-top: auto;
    align-self: flex-start;
}
.card h4 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}
.card p {
    margin-bottom: 1rem;
    font-size: 0.95rem;
}
.gray-box {
    background-color: #F0F0F0;
    border-radius: 6px;
    padding: 1.5rem;
    margin: 2rem 0;
}
.site-footer {
    background-color: #0F264D;
    color: #EDEEF2;
    text-align: center;
    padding: 1rem;
}
.footer-info {
    background-color: #153368;
    color: #EDEEF2;
    padding: 1rem;
    margin-top: 4rem;
    font-size: 1.15rem;
}
.info {
    max-width: 1200px;
    margin: 0 0 0 auto;
}
.back-to-top {
    position: fixed;
    right: 10rem;
    bottom: 3rem;
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 50%;
    background-color: #BDD7EE;
    background-image: url("../images/arrow.png");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 62px 62px;
    text-decoration: none;
    cursor: pointer;
    opacity: 0.9;
    z-index: 1000;
}
.back-to-top:hover,
.back-to-top:focus {
    background-color: #004999;
    outline: none;
}
.back-to-top:focus-visible {
    box-shadow: 0 0 0 3px rgba(255,255,255,.6);
}
@media (max-width: 1024px) {
    .card {
        flex: 1 1 calc(50% - 1.5rem);
    }
}
@media (max-width: 768px) {
    .global-nav ul {
        gap: 0.8rem;
    }
    .grid {
        flex-direction: column;
    }
    .card {
        flex: 1 1 calc(50% - 1.5rem);
        max-width: 100%;
    }
    .back-to-top {
        width: 28px;
        height: 28px;
        background-size: 40px 40px;
        right: 0.75rem;
        bottom: 0.75rem;
    }
}
@media (max-width: 600px) {
    .card {
        flex: 1 1 calc(50% - 1.5rem);
    }
    .back-to-top {
        width: 28px;
        height: 28px;
        background-size: 40px 40px;
        right: 0.75rem;
        bottom: 0.75rem;
    }
}