:root {
    --um-blue: #00274c;
    --um-maize: #ffcb05;
    --bg: #f7f8fa;
    --text: #1d2433;
    --muted: #4f5a6b;
    --border: #d5dae3;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "Courier New", Courier, monospace;
    line-height: 1.7;
}

.container {
    width: min(100% - 2rem, 960px);
    margin-inline: auto;
}

.site-header {
    background: var(--um-blue);
    /* border-bottom: 5px solid var(--um-maize); */
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    padding-block: 1rem;
}

.site-title {
    color: var(--um-maize);
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
}

a {
    color: var(--um-blue);
    text-underline-offset: 0.2em;
}

nav a {
    padding-block: 0.25rem;
    color: #fff;
}

nav a[aria-current="page"] {
    font-weight: 700;
    color: var(--um-maize);
    text-decoration-thickness: 3px;
    text-decoration-color: var(--um-maize);
}

a:focus-visible,
button:focus-visible,
select:focus-visible {
    outline: 3px solid var(--um-maize);
    outline-offset: 3px;
    box-shadow: 0 0 0 5px var(--um-blue);
}

main {
    padding-block: 2.5rem;
    overflow-wrap: anywhere;
}

h1,
h2,
h3 {
    color: var(--um-blue);
    line-height: 1.25;
}

h1 {
    margin-top: 0;
    font-size: clamp(2rem, 5vw, 2.75rem);
}

h2 {
    font-size: 1.35rem;
}

h3 {
    font-size: 1.05rem;
    margin: 0 0 0.25rem;
}

.intro {
    color: var(--muted);
    font-size: 1.125rem;
}

section {
    margin-top: 2rem;
    padding-top: 1rem;
    /* border-top: 3px solid var(--um-maize); */
}

li + li {
    margin-top: 0.75rem;
}

img {
    max-width: 100%;
    height: auto;
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 1rem;
    padding: 0.5rem 1rem;
    background: var(--um-maize);
    color: var(--um-blue);
    font-weight: 700;
    z-index: 1;
}

.skip-link:focus {
    top: 1rem;
}

/* ---------- Controls ---------- */
.controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    margin: 1.25rem 0;
}

button {
    font: inherit;
    font-weight: 700;
    padding: 0.5rem 1.1rem;
    border: 2px solid var(--um-blue);
    border-radius: 6px;
    background: var(--um-blue);
    color: var(--um-maize);
    cursor: pointer;
}

button:hover:not(:disabled) {
    background: var(--um-maize);
    color: var(--um-blue);
}

button.secondary {
    background: #fff;
    color: var(--um-blue);
}

button.secondary:hover:not(:disabled) {
    background: var(--um-maize);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

select {
    font: inherit;
    padding: 0.4rem;
    border: 2px solid var(--um-blue);
    border-radius: 6px;
    background: #fff;
    color: var(--um-blue);
}

.status {
    font-weight: 600;
    color: var(--muted);
}

.status.connected {
    color: #1a6b2f;
}

.status.error {
    color: #a3211a;
}

/* ---------- Data cards ---------- */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    margin-block: 1rem;
}

.card {
    position: relative;
    padding: 1rem 1.25rem;
    background: #fff;
    border: 1px solid var(--border);
    border-left: 6px solid var(--um-maize);
    border-radius: 8px;
}

.reading {
    margin: 0;
    color: var(--um-blue);
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
}

.unit {
    font-size: 1rem;
    font-weight: 600;
    color: var(--muted);
}

.note {
    margin: 0.25rem 0 0;
    color: var(--muted);
    font-size: 0.9rem;
}

/* ---------- Compass ---------- */
.compass {
    position: absolute;
    top: 1rem;
    right: 1.25rem;
    width: 84px;
    height: 84px;
    border: 3px solid var(--um-blue);
    border-radius: 50%;
    background: #fff;
}

.compass span {
    position: absolute;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--um-blue);
    line-height: 1;
}

.compass .n { top: 3px; left: 50%; transform: translateX(-50%); }
.compass .s { bottom: 3px; left: 50%; transform: translateX(-50%); }
.compass .e { right: 4px; top: 50%; transform: translateY(-50%); }
.compass .w { left: 4px; top: 50%; transform: translateY(-50%); }

.needle {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 6px;
    height: 56px;
    margin: -28px 0 0 -3px;
    background: linear-gradient(to bottom, var(--um-maize) 50%, var(--um-blue) 50%);
    border-radius: 3px;
    transform: rotate(0deg);
    transition: transform 0.4s ease;
}

/* ---------- Table ---------- */
.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #fff;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 0.5rem 0.9rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

thead th {
    background: var(--um-blue);
    color: var(--um-maize);
}

tbody tr:nth-child(even) {
    background: #f3f5f9;
}

.charts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin: 1rem 0 2rem;
}
.charts iframe {
    width: 100%;
    height: 260px;
    border: 1px solid #ccc;
    border-radius: 6px;
}