/* Hotel Technology Guides.
   System fonts only, no webfonts, no JavaScript: first byte paints. */
:root{
color-scheme:light dark;
--paper:#fcfbf9;--surface:#f5f2ec;--ink:#0f1417;--body:#2f363d;--muted:#697380;
--line:#e7e1d7;--rule:#d8d0c3;--accent:#0f5f5a;--accent2:#0b4b47;
--sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
--serif:Charter,"Iowan Old Style","Source Serif Pro",Georgia,Cambria,"Times New Roman",serif;
--measure:38rem;--shadow:0 1px 2px rgba(16,20,24,.05),0 10px 30px -18px rgba(16,20,24,.25)}
@media(prefers-color-scheme:dark){:root{
--paper:#0d1316;--surface:#151e22;--ink:#eef2f4;--body:#c2ccd3;--muted:#8595a1;
--line:#212c32;--rule:#2d3a41;--accent:#5ec8be;--accent2:#8fded6;
--shadow:0 1px 2px rgba(0,0,0,.35),0 10px 30px -18px rgba(0,0,0,.7)}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{margin:0;background:var(--paper);color:var(--body);
font-family:var(--serif);font-size:clamp(17px,16.2px + .25vw,19px);line-height:1.7;
font-kerning:normal;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
.wrap{max-width:var(--measure);margin:0 auto;padding:0 1.25rem 5rem}

/* header */
header.site{position:sticky;top:0;z-index:20;background:var(--paper);
border-bottom:1px solid var(--line)}
header.site .home{display:block;max-width:var(--measure);margin:0 auto;
padding:.95rem 1.25rem;font-family:var(--sans);font-size:.74rem;font-weight:650;
letter-spacing:.13em;text-transform:uppercase;color:var(--muted);text-decoration:none}
header.site .home:hover{color:var(--accent)}

/* headings */
h1{font-size:clamp(2rem,1.55rem + 1.9vw,2.85rem);line-height:1.12;letter-spacing:-.021em;
margin:.5rem 0 .7rem;color:var(--ink);font-weight:700;text-wrap:balance}
h2{font-size:clamp(1.35rem,1.2rem + .6vw,1.6rem);line-height:1.25;letter-spacing:-.012em;
margin:3.4rem 0 .7rem;padding-top:1.5rem;color:var(--ink);font-weight:700;
border-top:1px solid var(--line);scroll-margin-top:4.5rem;text-wrap:balance}
h3{font-size:clamp(1.08rem,1rem + .35vw,1.22rem);line-height:1.35;margin:2.2rem 0 .5rem;
color:var(--ink);font-weight:700;scroll-margin-top:4.5rem;text-wrap:balance}
p{margin:0 0 1.2rem;text-wrap:pretty;overflow-wrap:break-word}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:.16em}
a:hover{color:var(--accent2)}
:focus-visible{outline:2.5px solid var(--accent);outline-offset:3px;border-radius:3px}
ul,ol{margin:1rem 0 1.5rem;padding-left:1.35rem}
li{margin:.5rem 0}li::marker{color:var(--muted)}
strong{color:var(--ink);font-weight:650}
blockquote{margin:1.8rem 0;padding:.2rem 0 .2rem 1.3rem;border-left:3px solid var(--rule);
color:var(--ink);font-style:italic}
hr{border:0;border-top:1px solid var(--line);margin:2.6rem 0}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.86em;
background:var(--surface);padding:.12em .38em;border-radius:5px;
border:1px solid var(--line);overflow-wrap:break-word}
table{width:100%;border-collapse:collapse;margin:1.8rem 0;font-family:var(--sans);
font-size:.92rem;display:block;overflow-x:auto}
th,td{text-align:left;padding:.6rem .7rem;border-bottom:1px solid var(--line)}
th{color:var(--ink);font-weight:650}

/* figures break the measure on wide screens */
figure{margin:2.4rem 0}
figure img{width:100%;height:auto;display:block;border-radius:12px;
border:1px solid var(--line);background:var(--surface)}
figure.cover{margin:1.6rem 0 2rem}
figcaption{font-family:var(--sans);font-size:.85rem;line-height:1.55;color:var(--muted);
margin-top:.65rem;padding-left:.1rem}
@media(min-width:58rem){
figure{width:calc(100% + 7rem);margin-left:-3.5rem}
figure figcaption{padding-left:3.5rem;padding-right:3.5rem}}

/* article furniture */
.kicker{font-family:var(--sans);font-size:.71rem;font-weight:700;letter-spacing:.15em;
text-transform:uppercase;color:var(--accent);margin:2.2rem 0 0}
.byline,.meta{font-family:var(--sans);font-size:.86rem;line-height:1.6;color:var(--muted);
margin:0 0 1.7rem}
.byline a{color:var(--muted);text-decoration-color:var(--rule)}
.byline a:hover{color:var(--accent)}
.lede{font-size:1.16em;line-height:1.6;color:var(--ink);margin-bottom:1.6rem}

/* contents */
.toc{background:var(--surface);border:1px solid var(--line);border-radius:14px;
padding:1.25rem 1.5rem 1.35rem;margin:0 0 2.6rem;font-family:var(--sans);
box-shadow:var(--shadow)}
.toc h2{font-size:.71rem;letter-spacing:.15em;text-transform:uppercase;color:var(--muted);
margin:0 0 .7rem;border:0;padding:0;font-weight:700}
.toc ol{margin:0;padding-left:1.25rem;font-size:.94rem;line-height:1.45;
columns:1;column-gap:2rem}
.toc li{margin:.42rem 0;break-inside:avoid}
.toc a{color:var(--body);text-decoration:none}
.toc a:hover{color:var(--accent);text-decoration:underline}
@media(min-width:46rem){.toc ol{columns:2}}

/* index cards */
.cards{list-style:none;padding:0;margin:2.6rem 0 0;
display:grid;gap:1px;background:var(--line);border-block:1px solid var(--line)}
.cards li{margin:0;background:var(--paper);transition:background .15s ease}
.cards li:hover{background:var(--surface)}
.cards article{padding:1.6rem .25rem}
.cards h2{margin:0 0 .45rem;border:0;padding:0;font-size:1.24rem;line-height:1.3;
letter-spacing:-.01em}
.cards h2 a{color:var(--ink);text-decoration:none}
.cards li:hover h2 a{color:var(--accent)}
.cards p{margin:0 0 .5rem;font-size:.97em;line-height:1.62}
.cards .meta{margin:0;font-size:.8rem}

/* footer */
footer.page{margin-top:4.5rem;padding-top:1.5rem;border-top:1px solid var(--line);
font-family:var(--sans);font-size:.85rem;line-height:1.65;color:var(--muted)}
footer.page p{margin:0 0 .5rem}

.skip{position:absolute;left:-9999px}
.skip:focus{left:1rem;top:.75rem;z-index:30;background:var(--paper);color:var(--ink);
padding:.65rem 1rem;border:1px solid var(--accent);border-radius:8px}

/* home page */
.wrap.home{max-width:58rem}
.wrap.home h1{max-width:16ch}
.wrap.home .lede{font-size:clamp(1.15rem,1.05rem + .5vw,1.4rem);max-width:34ch;color:var(--ink)}
.wrap.home > .byline{padding-bottom:2.2rem;border-bottom:2px solid var(--ink);margin-bottom:0}
h2.rail{font-family:var(--sans);font-size:.71rem;font-weight:700;letter-spacing:.15em;
text-transform:uppercase;color:var(--muted);border:0;padding:1.4rem 0 0;margin:0}
.cards{border-block:0;background:transparent;gap:0}
.cards li{border-top:1px solid var(--line);background:transparent}
.cards li:first-child{border-top:0}
.cards li:hover{background:transparent}
.cards article{padding:1.7rem 0;display:grid;grid-template-columns:3.2rem 1fr;
column-gap:.4rem;align-items:start}
.num{grid-column:1;grid-row:1 / span 3;font-family:var(--sans);font-size:.78rem;
font-weight:700;letter-spacing:.06em;color:var(--accent);margin:.42rem 0 0;
font-variant-numeric:tabular-nums}
.cards h2,.cards p:not(.num){grid-column:2}
.cards h2 a{background-image:linear-gradient(var(--accent),var(--accent));
background-size:0 1.5px;background-position:0 100%;background-repeat:no-repeat;
transition:background-size .25s ease;padding-bottom:2px}
.cards li:hover h2 a{background-size:100% 1.5px}
@media(min-width:52rem){
.cards{grid-template-columns:1fr 1fr;column-gap:3rem}
.cards li:nth-child(2){border-top:0}}
@media(max-width:32rem){
.cards article{grid-template-columns:1fr;row-gap:.1rem}
.cards h2,.cards p:not(.num){grid-column:1}
.num{grid-column:1;grid-row:auto;margin:0 0 .2rem}}

/* optional masthead */
.masthead{background:var(--surface);border-bottom:1px solid var(--line)}
.masthead img{display:block;width:100%;margin:0;
height:clamp(96px,22vw,280px);object-fit:cover;object-position:center 45%}
@media print{.masthead{display:none}}

/* navigation */
header.site .bar{max-width:var(--measure);margin:0 auto;padding:.8rem 1.25rem;
display:flex;align-items:center;justify-content:space-between;gap:1rem}
header.site .home{padding:0;display:inline-block}
.topnav{display:flex;gap:1.1rem;font-family:var(--sans);font-size:.78rem;font-weight:600;
letter-spacing:.04em}
.topnav a{color:var(--muted);text-decoration:none;padding:.35rem 0}
.topnav a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:.2em}
.wrap.home ~ * .bar,body:has(.wrap.home) header.site .bar{max-width:58rem}
.crumbs{font-family:var(--sans);font-size:.78rem;color:var(--muted);
padding:1.4rem 0 0;display:flex;flex-wrap:wrap;gap:.4rem;align-items:center}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent);text-decoration:underline}
.pager{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);
border-radius:14px;overflow:hidden;margin:3.5rem 0 0}
.pager a{background:var(--paper);padding:1.15rem 1.3rem;text-decoration:none;
display:block;transition:background .15s ease}
.pager a:hover{background:var(--surface)}
.pager span{display:block;font-family:var(--sans);font-size:.72rem;font-weight:700;
letter-spacing:.13em;text-transform:uppercase;color:var(--accent);margin-bottom:.3rem}
.pager b{color:var(--ink);font-weight:700;line-height:1.3}
.pager .next{text-align:right}
@media(min-width:40rem){.pager{grid-template-columns:1fr 1fr}
.pager .next:only-child{grid-column:2}}
.alsoon{margin:2.8rem 0 0;padding:1.05rem 1.25rem;background:var(--surface);
border:1px solid var(--line);border-radius:12px}
.alsoon p{margin:0;font-family:var(--sans);font-size:.9rem;line-height:1.6;color:var(--muted)}
.alsoon a{color:var(--accent);font-weight:600}
.sitenav{margin:2.6rem 0 0;font-family:var(--sans)}
.sitenav h2{font-size:.71rem;letter-spacing:.15em;text-transform:uppercase;color:var(--muted);
border:0;padding:0;margin:0 0 .7rem;font-weight:700}
.sitenav ol{margin:0;padding-left:1.3rem;font-size:.93rem;columns:1}
.sitenav li{margin:.38rem 0;break-inside:avoid}
.sitenav a{color:var(--body);text-decoration:none}
.sitenav a:hover{color:var(--accent);text-decoration:underline}
.sitenav li[aria-current] span{color:var(--muted)}
@media(min-width:44rem){.sitenav ol{columns:2;column-gap:2rem}}

@media print{
header.site,.toc,.skip,.pager,.sitenav,.crumbs,.alsoon{display:none}
body{background:#fff;color:#000;font-size:11pt}
.wrap{max-width:none;padding:0}
figure{width:auto;margin-left:0;break-inside:avoid}
h2,h3{break-after:avoid}
a{color:#000;text-decoration:none}
a[href^="http"]::after{content:" (" attr(href) ")";font-size:8pt;color:#555;word-break:break-all}}

/* series: written into site.css only when a series is in the build */
.topnav{flex-wrap:wrap;justify-content:flex-end;column-gap:1.1rem;row-gap:0}
.series details{margin:1.6rem 0;padding:0 1.15rem;border:1px solid var(--line);
border-radius:12px;background:var(--surface)}
.series summary{cursor:pointer;font-family:var(--sans);font-size:.92rem;font-weight:650;
color:var(--accent);padding:.85rem 0}
.series summary:hover{color:var(--accent2)}
.series details[open] summary{border-bottom:1px solid var(--line);margin-bottom:1.1rem}
.series details > :last-child{margin-bottom:1.1rem}
.series table{max-width:100%;-webkit-overflow-scrolling:touch}
.series td{vertical-align:top}
.series article img{max-width:100%;height:auto}
.series figure.diagram img{background:#fcfbf9}
.series .pending{display:block;background:#fff3cd;color:#5c4400;border:1px solid #f0d78c;
padding:.7rem .9rem;border-radius:8px;font-family:var(--sans);font-size:.85rem;line-height:1.5}
@media(prefers-color-scheme:dark){.series .pending{background:#3a2f0b;color:#f5e3a3;
border-color:#6b5a1c}}
.lessonpager{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);
border-radius:14px;overflow:hidden;margin:3.5rem 0 0}
.lessonpager a,.lessonpager .none{background:var(--paper);padding:1.1rem 1.25rem;
text-decoration:none;display:block;transition:background .15s ease}
.lessonpager a:hover{background:var(--surface)}
.lessonpager span{display:block;font-family:var(--sans);font-size:.72rem;font-weight:700;
letter-spacing:.13em;text-transform:uppercase;color:var(--accent);margin-bottom:.3rem}
.lessonpager b{color:var(--ink);font-weight:700;line-height:1.3}
.lessonpager .none{display:none}
@media(min-width:40rem){.lessonpager{grid-template-columns:1fr 1fr 1fr}
.lessonpager .none{display:block}.lessonpager .all{text-align:center}
.lessonpager .next{text-align:right}}
.seriesblock{padding:1.7rem 0 0}
.seriesblock h2{margin:0 0 .45rem;border:0;padding:0;font-size:1.24rem;line-height:1.3}
.seriesblock h2 a{color:var(--ink);text-decoration:none}
.seriesblock h2 a:hover{color:var(--accent);text-decoration:underline}
.seriesblock p{margin:0 0 .5rem;font-size:.97em;line-height:1.62}
.seriesblock p.meta{margin:0;font-size:.8rem}
.feedback{margin:3.2rem 0 0;padding:1.5rem 1.3rem;border:1px solid var(--line);
border-radius:14px;background:var(--surface);font-family:var(--sans)}
.feedback h2{margin:0 0 .4rem;border:0;padding:0;font-size:1.2rem}
.feedback p{font-size:.92rem;margin:0 0 1rem}
.feedback fieldset{border:0;padding:0;margin:0 0 1.1rem}
.feedback legend{font-weight:650;color:var(--ink);font-size:.92rem;margin-bottom:.45rem}
.feedback legend span,.feedback .field span{font-weight:400;color:var(--muted);font-size:.8rem}
.feedback .choice{display:inline-flex;align-items:center;gap:.4rem;margin:0 1rem .5rem 0;
font-size:.92rem;cursor:pointer}
.feedback .field{display:block;font-weight:650;color:var(--ink);font-size:.92rem;margin:0 0 1.1rem}
.feedback select,.feedback textarea,.feedback input[type=email]{display:block;width:100%;
margin-top:.4rem;font:inherit;font-weight:400;font-size:.95rem;color:var(--ink);
background:var(--paper);border:1px solid var(--rule);border-radius:8px;padding:.55rem .65rem}
.feedback textarea{resize:vertical}
.feedback button{font:inherit;font-weight:650;font-size:.95rem;color:#fff;background:var(--accent);
border:0;border-radius:8px;padding:.7rem 1.3rem;cursor:pointer}
.feedback button:hover{background:var(--accent2)}
.feedback .note{font-size:.78rem;color:var(--muted);margin:.8rem 0 0}
.feedback .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
@media(prefers-color-scheme:dark){.feedback button{color:#0d1316}}
@media print{.lessonpager{display:none}.series details{border:0;padding:0}.feedback{display:none}}