/* PowerHud Modbus Tester - modbustester.com
   One stylesheet, no JavaScript, no frameworks. */

:root {
    --ink: #16191c;
    --text: #34393d;
    --muted: #6a7075;
    --line: #e3e6e8;
    --line-dark: #cfd4d7;
    --soft: #f7f8f9;
    --accent: #0f7a5f;
    --accent-dark: #0b5c47;
}

* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-padding-top: 24px;
}

body {
    margin: 0;
    background: #fff;
    color: var(--text);
    font: 17px/1.7 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* One content width for everything: text, screenshots, header and footer all
   share the same left and right edges. */
.wrap {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- type ---------------------------------------------------------------- */

h1,
h2,
h3,
h4 {
    color: var(--ink);
    line-height: 1.25;
    font-weight: 600;
}

h1 {
    font-size: 33px;
    letter-spacing: -.02em;
    margin: 0 0 18px;
}

h2 {
    font-size: 23px;
    letter-spacing: -.01em;
    margin: 46px 0 12px;
}

h3 {
    font-size: 18px;
    margin: 30px 0 8px;
}

h4 {
    font-size: 16px;
    margin: 24px 0 6px;
}

p {
    margin: 0 0 16px;
}

ul,
ol {
    margin: 0 0 16px;
    padding-left: 24px;
}

li {
    margin-bottom: 6px;
}

a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

a:hover {
    color: var(--accent-dark);
}

strong {
    color: var(--ink);
    font-weight: 600;
}

hr {
    border: 0;
    border-top: 1px solid var(--line);
    margin: 44px 0;
}

code {
    font: 400 15px/1.5 Consolas, Menlo, "Courier New", monospace;
    background: var(--soft);
    border: 1px solid var(--line);
    border-radius: 3px;
    padding: 1px 5px;
}

.lead {
    font-size: 19px;
    line-height: 1.65;
    color: var(--text);
}

.small {
    font-size: 15px;
    color: var(--muted);
}

.muted {
    color: var(--muted);
}

/* --- header -------------------------------------------------------------- */

.hdr {
    border-bottom: 1px solid var(--line);
    padding: 16px 0;
    margin-bottom: 40px;
}

.hdr .wrap {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 22px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 9px;
    color: var(--ink);
    font-size: 17px;
    font-weight: 600;
    text-decoration: none;
}

.logo img {
    width: 26px;
    height: 26px;
}

.hdr nav {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-left: auto;
    font-size: 16px;
}

.hdr nav a {
    color: var(--text);
    text-decoration: none;
}

.hdr nav a:hover,
.hdr nav a[aria-current="page"] {
    color: var(--accent);
}

/* --- links and buttons --------------------------------------------------- */

.btn {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    padding: 12px 20px;
    border-radius: 3px;
    text-decoration: none;
}

.btn:hover {
    background: var(--accent-dark);
    color: #fff;
}

.btn-line {
    background: #fff;
    color: var(--ink);
    border: 1px solid var(--line-dark);
}

.btn-line:hover {
    background: var(--soft);
    color: var(--ink);
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    justify-content: center;
    margin: 26px 0 10px;
}

/* the note directly under a button row is centred with it */
.actions + .small {
    text-align: center;
}

/* --- crumbs -------------------------------------------------------------- */

.crumbs {
    font-size: 14px;
    color: var(--muted);
    margin: 0 0 14px;
}

.crumbs a {
    color: var(--muted);
}

/* --- figures ------------------------------------------------------------- */

figure {
    margin: 28px 0;
}

figure img {
    border: 1px solid var(--line-dark);
    width: 100%;
    height: auto;
    display: block;
}

figcaption {
    font-size: 14px;
    color: var(--muted);
    margin-top: 8px;
}

/* --- tables -------------------------------------------------------------- */

.tbl {
    overflow-x: auto;
    margin: 0 0 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 16px;
}

th,
td {
    text-align: left;
    vertical-align: top;
    padding: 9px 14px 9px 0;
    border-bottom: 1px solid var(--line);
}

th {
    color: var(--ink);
    font-weight: 600;
    white-space: nowrap;
}

td:first-child {
    color: var(--ink);
    padding-right: 22px;
}

/* --- notes --------------------------------------------------------------- */

.note {
    background: var(--soft);
    border-left: 3px solid var(--line-dark);
    padding: 14px 18px;
    margin: 0 0 20px;
    font-size: 16px;
}

.note p:last-child {
    margin-bottom: 0;
}

.note-warn {
    background: #fbeed3;
    border: 1px solid #e0bd76;
    color: #4a3a17;
}

.note-warn strong {
    color: #3a2c0f;
}

/* --- table of contents --------------------------------------------------- */

.toc {
    background: var(--soft);
    border: 1px solid var(--line);
    padding: 18px 22px;
    margin: 0 0 40px;
    font-size: 16px;
}

.toc p {
    color: var(--ink);
    font-weight: 600;
    margin: 0 0 8px;
}

.toc ol {
    margin: 0;
    padding-left: 22px;
}

.toc li {
    margin-bottom: 3px;
}

/* --- download row -------------------------------------------------------- */

.dl {
    border: 1px solid var(--line-dark);
    padding: 20px 22px;
    margin: 0 0 16px;
}

.dl h3 {
    margin: 0 0 6px;
}

.dl p {
    margin: 0 0 14px;
}

.dl .meta {
    font: 400 14px/1.5 Consolas, Menlo, "Courier New", monospace;
    color: var(--muted);
    margin: 12px 0 0;
}

/* --- accordion (details / summary) --------------------------------------- */

.acc {
    border: 1px solid var(--line-dark);
    margin: 0 0 10px;
    background: #fff;
}

.acc>summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    color: var(--ink);
    font-size: 17px;
    font-weight: 600;
}

.acc>summary::-webkit-details-marker {
    display: none;
}

.acc>summary::before {
    content: "";
    flex: none;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--muted);
    border-bottom: 2px solid var(--muted);
    transform: rotate(-45deg);
    transition: transform .15s ease;
}

.acc[open]>summary::before {
    transform: rotate(45deg);
}

.acc>summary:hover {
    background: var(--soft);
}

.acc>summary:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

.acc summary .acc-meta {
    margin-left: auto;
    font-weight: 400;
    font-size: 14px;
    color: var(--muted);
    text-align: right;
}

.acc-body {
    border-top: 1px solid var(--line);
    padding: 16px 18px 18px;
}

.acc-body p {
    margin: 0 0 14px;
}

.acc-body p:last-child {
    margin-bottom: 0;
}

@media (max-width: 640px) {
    .acc>summary {
        flex-wrap: wrap;
    }

    .acc summary .acc-meta {
        margin-left: 20px;
        width: 100%;
        text-align: left;
    }
}

/* --- changelog ----------------------------------------------------------- */

.rel h3 {
    margin: 28px 0 6px;
    font-size: 17px;
}

.rel h3 span {
    font-weight: 400;
    color: var(--muted);
    font-size: 15px;
}

/* --- footer -------------------------------------------------------------- */

.ftr {
    border-top: 1px solid var(--line);
    margin-top: 64px;
    padding: 28px 0 44px;
    font-size: 15px;
    color: var(--muted);
}

.ftr nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 20px;
    margin-bottom: 12px;
}

.ftr a {
    color: var(--text);
}

.ftr p {
    margin: 0 0 6px;
}

/* --- small screens ------------------------------------------------------- */

@media (max-width: 640px) {
    body {
        font-size: 16.5px;
    }

    h1 {
        font-size: 27px;
    }

    h2 {
        font-size: 21px;
        margin-top: 38px;
    }

    .hdr nav {
        margin-left: 0;
        width: 100%;
        gap: 16px;
    }

    .lead {
        font-size: 17.5px;
    }
}