/* site.css - What only this site needs, on top of col.css.
 *
 * The look: blue ink on paper, the design system's own; a period serif for
 * the display lines (the game's own title is set in one); the
 * before-and-after slider.
 *
 * Every colour is a col.css token, except over the game's pictures, where a
 * label has to read on whatever the picture is. Anything another OpenCol page
 * could use belongs in OpenCol/web-ui instead.
 */

:root{
  --font-display:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",
    "URW Palladio L",Georgia,serif;
  --site-w:1240px;
}

html{scroll-behavior:smooth;scroll-padding-top:72px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.site-skip{position:absolute;left:-9999px;top:8px;z-index:100}
.site-skip:focus{left:8px;background:var(--surface);padding:8px 12px;
  border:1px solid var(--brand);border-radius:var(--r-sm)}
.site-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);
  white-space:nowrap}
.site-ext{width:.8em;height:.8em;flex:none;vertical-align:-.05em;opacity:.7}

.site-wrap{max-width:var(--site-w);margin:0 auto;padding:0 28px}
@media (max-width:640px){.site-wrap{padding:0 16px}}

.site-display{font-family:var(--font-display);font-weight:600;letter-spacing:-.01em;
  line-height:1.05;text-wrap:balance}

/* ---------------------------------------------------------------- the bar */
.col-bar-in{max-width:var(--site-w);padding-left:28px;padding-right:28px}
.site-version{text-decoration:none}
.site-menu{display:flex;gap:2px;flex-wrap:wrap}
.site-menu .col-btn{gap:5px}
@media (max-width:860px){.site-menu{display:none}}

/* ---------------------------------------------------------------- hero */
.site-hero{padding:88px 0 56px}
.site-hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);
  gap:32px 64px;align-items:end}
.site-hero h1{font-size:clamp(44px,6.6vw,92px);margin:0}
.site-hero-lead{font-size:clamp(17px,1.6vw,20px);line-height:1.55;color:var(--text-2);
  max-width:44ch;margin:0 0 28px}
@media (max-width:960px){.site-hero-grid{grid-template-columns:1fr}}

.site-get{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.site-get-note{margin:0;font-size:14px;color:var(--text-3);max-width:46ch}

/* The download for this computer, big; the other two stacked small beside it.
   The page script moves the visitor's own system to the front. */
.site-downloads-btns{display:grid;grid-template-columns:auto auto;grid-auto-flow:column;
  gap:8px 10px;align-items:stretch;justify-content:start}
.site-downloads-btns .col-btn{flex-direction:column;align-items:flex-start;gap:4px}
.site-downloads-btns .col-btn:first-child{grid-row:span 2;justify-content:center;
  padding:15px 28px;font-size:17px}
.site-downloads-btns .col-btn + .col-btn{min-height:0;padding:7px 14px;font-size:13px;
  flex-direction:row;align-items:baseline;gap:10px;--_bg:transparent;--_fg:var(--text-2);
  --_bd:var(--border-strong)}
.site-downloads-btns .col-btn + .col-btn:hover{background:var(--surface-2);color:var(--text)}
.site-downloads-btns .col-btn + .col-btn .site-btn-pre{display:none}
.site-btn-meta{font-family:var(--font-mono);font-size:11px;font-weight:500;opacity:.8}

/* ---------------------------------------------------------------- slider */
.site-compare-tabs{margin-bottom:0;border-bottom:0}
.site-compare{position:relative;aspect-ratio:var(--_ar);
  border:1px solid var(--border-strong);background:#000;overflow:hidden;
  user-select:none;-webkit-user-select:none}
.site-compare img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;
  image-rendering:pixelated}
.site-compare-before{clip-path:inset(0 calc(100% - var(--x)) 0 0)}
.site-compare-line{position:absolute;top:0;bottom:0;left:var(--x);width:2px;
  margin-left:-1px;background:var(--line-fill);pointer-events:none}
.site-compare-line::after{content:"\2194";position:absolute;top:50%;left:50%;
  width:40px;height:40px;transform:translate(-50%,-50%);display:grid;place-items:center;
  font-size:20px;color:var(--on-line);background:var(--line-fill);border-radius:50%}
/* On the picture, so fixed colours: light ink on a dark chip reads on any map. */
.site-compare-tag{position:absolute;top:12px;left:12px;padding:4px 9px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;
  color:#e6eefa;background:rgba(6,20,38,.82);border-radius:var(--r-xs);pointer-events:none}
.site-compare-tag--r{left:auto;right:12px;color:#7fdcff}
.site-compare input{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;
  cursor:ew-resize;-webkit-appearance:none;appearance:none}
.site-compare:has(input:focus-visible){outline:2px solid var(--brand);outline-offset:3px}
.site-compare-foot{display:flex;flex-wrap:wrap;justify-content:space-between;
  align-items:baseline;gap:8px 32px;margin-top:16px}
.site-compare-say{margin:0;font-family:var(--font-display);font-style:italic;
  font-size:clamp(18px,2vw,22px);color:var(--text-2);max-width:60ch}
.site-compare-foot .site-more{margin:0}

/* ---------------------------------------------------------------- spec */
.site-spec{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin:88px 0 0;
  border-top:1px solid var(--border-strong);border-bottom:1px solid var(--border-strong)}
.site-spec > div{padding:20px 22px 22px 0}
.site-spec > div + div{padding-left:22px;border-left:1px solid var(--border)}
.site-spec dt{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--line);margin:0 0 6px}
.site-spec dd{margin:0;font-size:15.5px;line-height:1.45;color:var(--text)}
@media (max-width:860px){
  .site-spec{grid-template-columns:1fr 1fr}
  .site-spec > div:nth-child(3){padding-left:0;border-left:0}
  .site-spec > div:nth-child(n+3){border-top:1px solid var(--border)}
}
@media (max-width:520px){
  .site-spec{grid-template-columns:1fr}
  .site-spec > div,.site-spec > div + div{padding:16px 0;border-left:0}
  .site-spec > div + div{border-top:1px solid var(--border)}
}

/* ---------------------------------------------------------------- sections */
.site-section{padding-top:112px}
.site-section--tight{padding-top:80px}
.site-head{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:16px 48px;
  align-items:end;margin:0 0 36px}
.site-head h2{font-size:clamp(32px,4.4vw,52px);margin:0}
.site-head p{margin:0;color:var(--text-2);font-size:17px;max-width:44ch}
@media (max-width:860px){.site-head{grid-template-columns:1fr}}
.site-head > *{min-width:0}
.site-more{margin:28px 0 0;font-size:15px}
.site-more a::after{content:" \2192"}
.site-small{font-size:14px;color:var(--text-3)}

/* Numbered steps */
.site-steps{list-style:none;counter-reset:step;margin:0 0 32px;padding:0;
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0}
.site-steps--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.site-steps li{counter-increment:step;position:relative;padding:64px 28px 0 0;
  color:var(--text-2);font-size:16px}
.site-steps li + li{padding-left:28px;border-left:1px solid var(--border)}
.site-steps li::before{content:counter(step);position:absolute;top:0;
  font-family:var(--font-display);font-size:48px;line-height:1;color:var(--line)}
.site-steps b{color:var(--text)}
@media (max-width:960px){.site-steps--4{grid-template-columns:1fr 1fr;row-gap:32px}
  .site-steps--4 li:nth-child(3){padding-left:0;border-left:0}}
@media (max-width:860px){
  .site-steps,.site-steps--4{grid-template-columns:1fr;gap:28px}
  .site-steps li,.site-steps li + li,.site-steps--4 li:nth-child(3){padding:0 0 0 56px;
    border-left:0}
  .site-steps li::before{left:0;font-size:36px}
}
.site-downloads td:nth-child(2){text-align:left}
.site-downloads code{white-space:nowrap}

/* The map strip: real previews at one height, scrolling sideways. */
.site-maps{display:flex;gap:16px;overflow-x:auto;padding:0 0 12px;
  scroll-snap-type:x proximity}
.site-map{flex:none;display:flex;flex-direction:column;gap:3px;color:var(--text);
  text-decoration:none;scroll-snap-align:start}
.site-map img{display:block;height:200px;width:auto;image-rendering:pixelated;
  border:1px solid var(--border-strong);background:var(--surface-3);margin-bottom:8px;
  transition:border-color var(--t-fast) var(--ease)}
.site-map:hover img{border-color:var(--brand)}
.site-map:hover .site-map-t{color:var(--brand)}
.site-map-t{font-family:var(--font-display);font-size:18px;font-weight:600}
.site-maps-btns{margin-top:20px}
@media (max-width:640px){.site-map img{height:160px}}

/* Three ways in: a ruled row of links, not a row of cards. */
.site-paths{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  border-top:1px solid var(--border-strong);border-bottom:1px solid var(--border-strong)}
.site-path{display:flex;flex-direction:column;gap:6px;padding:24px 24px 26px 0;
  color:var(--text-2);text-decoration:none}
.site-path + .site-path{padding-left:24px;border-left:1px solid var(--border)}
.site-path b{font-family:var(--font-display);font-size:24px;font-weight:600;
  color:var(--brand);display:flex;align-items:center;gap:8px}
.site-path:hover{color:var(--text)}
.site-path:hover b{color:var(--brand-hover);text-decoration:underline;
  text-underline-offset:4px;text-decoration-thickness:1px}
@media (max-width:760px){
  .site-paths{grid-template-columns:1fr}
  .site-path,.site-path + .site-path{padding:20px 0;border-left:0}
  .site-path + .site-path{border-top:1px solid var(--border)}
}

/* ---------------------------------------------------------------- rules page */
.site-page-head{padding-top:72px}
.site-rules{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px 64px;
  align-items:center}
.site-rules > *{min-width:0}
.site-rules h1{font-size:clamp(40px,5.6vw,72px);margin:0 0 24px}
.site-rules p{font-size:17px;color:var(--text-2);max-width:52ch}
@media (max-width:900px){.site-rules{grid-template-columns:1fr}}
.site-ini{margin:0;border:1px solid var(--border-strong);background:var(--surface);
  border-radius:var(--r)}
.site-ini figcaption{padding:9px 16px;font-family:var(--font-mono);font-size:11.5px;
  letter-spacing:.1em;color:var(--text-3);border-bottom:1px solid var(--border)}
.site-ini pre{margin:0;border:0;border-radius:0;background:none;font-size:13.5px;
  padding:18px 16px;line-height:1.75}
.site-ini b{color:var(--line);font-weight:700}
.site-ini .c{color:var(--text-3)}
.site-ini .s{color:var(--brand)}
.site-rules-prose{max-width:78ch}

/* ---------------------------------------------------------------- the ship */
.site-landho{padding-top:112px;text-align:center}
/* A watercolour on white paper: on the page, the paper melts into the ground. */
.site-ship{width:calc(100% - 56px);max-width:calc(var(--site-w) - 56px);
  mix-blend-mode:multiply}
.site-landho-in{padding:32px 28px 96px;display:flex;flex-direction:column;
  align-items:center;gap:28px}
.site-landho .site-downloads-btns{justify-content:center}

/* ---------------------------------------------------------------- footer */
.site-foot{border-top:1px solid var(--border);background:var(--surface)}
.site-foot-in{padding-top:36px;padding-bottom:36px}
.site-foot-cols{display:flex;flex-wrap:wrap;gap:24px 72px;margin-bottom:24px}
.site-foot-cols > div{display:flex;flex-direction:column;gap:6px;font-size:14px}
.site-foot-cols .col-nav-title{padding:0}
.site-foot-cols a{color:var(--text-2);text-decoration:none}
.site-foot-cols a:hover{color:var(--brand)}
.site-legal{font-size:12.5px;max-width:90ch;margin:0}

/* ---------------------------------------------------------------- changelog */
.site-release-links{margin:4px 0 28px}
.site-h1-badge{vertical-align:middle;font-size:11px}
.col-docs-main h1{font-family:var(--font-display);font-weight:600;
  font-size:clamp(34px,4.4vw,52px)}
.col-prose img{image-rendering:pixelated}
.col-prose td img{min-width:240px}

/* ---------------------------------------------------------------- phones */
.site-hero-grid > *{min-width:0}
@media (max-width:640px){
  .site-hero{padding:48px 0 40px}
  .site-downloads-btns{grid-template-columns:1fr 1fr;grid-auto-flow:row;width:100%}
  .site-downloads-btns .col-btn:first-child{grid-row:auto;grid-column:1 / -1}
  .site-downloads-btns .col-btn + .col-btn{flex-direction:column;gap:2px}
  .site-spec{margin-top:56px}
  .site-section,.site-landho{padding-top:80px}
  .site-page-head{padding-top:40px}
}