/* Styled after the Factorio in-game GUI: bevelled frames, inset panels,
   beige headings and the orange hover glow. */
:root {
  --page: #1a191a;
  --frame: #313031;
  --frame-hi: #4c4b4c;
  --frame-lo: #1c1b1c;
  --deep: #242324;
  --deep-2: #2b2a2b;
  --text: #ffffff;
  --muted: #b9b4ab;
  --heading: #ffe6c0;
  --orange: #ffa632;
  --link: #ffb54a;
  --button: #8e8e8e;
  --button-hi: #b4b4b4;
  --button-lo: #5c5c5c;
  --green: #5eb663;
  --green-hi: #8bd38e;
  --green-lo: #397a3d;
  --max: 1720px;
  --card: clamp(136px, 11vw, 240px);
}

* { box-sizing: border-box; }

/* text grows a little on big screens so wide layouts don't look empty */
html { background: var(--page); font-size: clamp(15px, 0.3vw + 11px, 18px); }

body {
  margin: 0;
  min-height: 100vh;
  padding: clamp(12px, 2vw, 40px) clamp(8px, 2vw, 40px) 48px;
  background:
    radial-gradient(ellipse at 50% -20%, #2c2a26 0%, transparent 60%),
    var(--page);
  color: var(--text);
  font: 400 1rem/1.5 "Titillium Web", system-ui, sans-serif;
}

a { color: var(--link); }
a:hover { color: var(--orange); }

/* ---------- window frame ---------- */

.window {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 12px 12px;
  background: var(--frame);
  border-radius: 4px;
  box-shadow:
    inset 1px 1px 0 var(--frame-hi),
    inset -1px -1px 0 var(--frame-lo),
    0 0 0 1px #000,
    0 18px 40px #000a;
}

.titlebar {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
}

.titlebar h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--heading);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* the striped "drag handle" that fills Factorio title bars */
.drag {
  flex: 1;
  min-width: 24px;
  height: 22px;
  background: repeating-linear-gradient(
    to bottom,
    #545354 0 2px,
    #1d1c1d 2px 3px,
    transparent 3px 5px
  );
  opacity: .8;
}

.inner {
  background: var(--frame);
  padding: 12px;
  border-radius: 2px;
  box-shadow: inset 0 0 0 1px #000, inset 1px 1px 0 2px #3c3b3c;
}

.deep {
  background: var(--deep);
  border-radius: 2px;
  box-shadow: inset 0 2px 4px #000c, inset 0 0 0 1px #0d0d0d;
}

.section-title {
  margin: 20px 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--heading);
}
.section-title:first-child { margin-top: 0; }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  min-height: 34px;
  border: 0;
  border-radius: 3px;
  background: var(--button);
  color: #000;
  font: 600 .94rem/1 "Titillium Web", sans-serif;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  box-shadow:
    inset 0 1px 0 var(--button-hi),
    inset 0 -2px 0 var(--button-lo),
    0 0 0 1px #000,
    0 2px 2px #0008;
}
.btn:hover, .btn:focus-visible {
  background: var(--orange);
  color: #000;
  box-shadow: inset 0 1px 0 #ffd08a, inset 0 -2px 0 #b06a10, 0 0 0 1px #000, 0 0 10px #ffa63266;
  outline: none;
}
.btn:active { transform: translateY(1px); }

.btn.green {
  background: var(--green);
  box-shadow: inset 0 1px 0 var(--green-hi), inset 0 -2px 0 var(--green-lo), 0 0 0 1px #000, 0 2px 2px #0008;
}
.btn.green:hover, .btn.green:focus-visible {
  background: var(--green-hi);
  box-shadow: inset 0 1px 0 #c3f0c4, inset 0 -2px 0 var(--green-lo), 0 0 0 1px #000, 0 0 10px #8bd38e66;
}

/* ---------- home: intro + stats ---------- */

.intro {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.intro p { margin: 0; color: var(--muted); max-width: 52ch; }

.ai-note {
  margin: 10px 0 0;
  padding: 5px 10px;
  border-left: 3px solid var(--orange);
  background: #2a2723;
  font-size: .85rem;
  color: var(--muted);
}
.ai-note b { color: var(--heading); font-weight: 600; }

.stats { display: flex; flex-wrap: wrap; gap: 8px; }
.stat {
  padding: 6px 14px;
  min-width: 110px;
}
.stat b { display: block; font-size: 1.25rem; font-weight: 700; line-height: 1.2; }
.stat span { font-size: .8rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }

/* ---------- home: looping carousel ---------- */

.belt {
  position: relative;
  overflow: hidden;
  padding: 18px 0;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
}

.track {
  display: flex;
  gap: 16px;
  width: max-content;
  padding: 0 8px;
  animation: belt var(--belt-time, 60s) linear infinite;
}
/* mouse hover keeps it moving (see app.js); only keyboard focus stops it */
.belt:has(.card:focus-visible) .track { animation-play-state: paused; }

@keyframes belt {
  to { transform: translateX(-50%); }
}

.card {
  flex: none;
  width: var(--card);
  padding: 10px 10px 8px;
  background: var(--frame);
  border-radius: 3px;
  color: var(--text);
  text-decoration: none;
  box-shadow: inset 1px 1px 0 var(--frame-hi), inset -1px -1px 0 var(--frame-lo), 0 0 0 1px #000, 0 4px 8px #0009;
  transition: transform .15s ease, box-shadow .15s ease;
}
.card .slot {
  display: block;
  aspect-ratio: 1;
  padding: 6px;
}
.card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 1px;
}
.card .name {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 8px;
  min-height: 2.6em;
  font-weight: 600;
  line-height: 1.3;
  color: var(--heading);
  text-align: center;
}
/* .hot is set by app.js: :hover isn't refreshed while a card slides under a still mouse */
.card.hot, .card:focus-visible {
  outline: none;
  transform: translateY(-4px);
  box-shadow: inset 1px 1px 0 var(--frame-hi), inset -1px -1px 0 var(--frame-lo), 0 0 0 2px var(--orange), 0 0 18px #ffa63255;
}
.card.hot .name, .card:focus-visible .name { color: var(--orange); }

.noimg {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  color: #5e5c58;
  font-size: 2.5rem;
  font-weight: 700;
}

/* ---------- home: list ---------- */

/* one column normally, two or more on wide screens; the 1px gaps are the separators */
.list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 560px), 1fr));
  gap: 1px;
  list-style: none;
  margin: 0;
  padding: 4px;
  background: #191819;
}
.list li { background: var(--deep); }

.row {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 8px 10px;
  color: var(--text);
  text-decoration: none;
  border-radius: 2px;
}
.row:hover, .row:focus-visible { background: #3a3631; outline: 1px solid var(--orange); }
.row img, .row .noimg { width: 56px; height: 56px; border-radius: 2px; font-size: 1.4rem; background: var(--deep-2); }
.row .t { font-weight: 700; color: var(--heading); }
.row:hover .t { color: var(--orange); }
.row .s {
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: .9rem;
  color: var(--muted);
}
.row .meta { text-align: right; font-size: .85rem; color: var(--muted); white-space: nowrap; }
.row .meta b { color: var(--text); font-weight: 600; }

.footer {
  max-width: var(--max);
  margin: 16px auto 0;
  text-align: center;
  font-size: .8rem;
  color: #77736c;
}
.footer a { color: inherit; }

/* ---------- mod page ---------- */

.mod {
  display: grid;
  grid-template-columns: clamp(260px, 22vw, 380px) minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.side .slot { padding: 8px; }
.side .slot img, .side .slot .noimg { display: block; width: 100%; aspect-ratio: 1; object-fit: cover; }
.side .summary { margin: 12px 2px; color: var(--muted); }
.side .actions { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.side .actions .btn { justify-content: center; }

.facts { margin: 12px 0 0; padding: 6px 10px; }
.facts div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 5px 0;
  font-size: .92rem;
}
.facts div + div { border-top: 1px solid #191819; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; text-align: right; font-weight: 600; }

.tags { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 4px; }
.tag {
  padding: 0 7px;
  border-radius: 2px;
  background: #403e3a;
  font-size: .8rem;
  font-weight: 600;
}

.tabs { display: flex; flex-wrap: wrap; gap: 4px; padding: 0 4px; }
.tab {
  padding: 6px 16px 4px;
  border: 0;
  border-radius: 3px 3px 0 0;
  background: #575657;
  color: #fff;
  font: 600 .94rem/1.3 "Titillium Web", sans-serif;
  cursor: pointer;
  box-shadow: inset 0 1px 0 #6d6c6d, 0 0 0 1px #000;
}
.tab:hover { background: #6b5a40; }
.tab[aria-selected="true"] {
  background: var(--deep);
  color: var(--heading);
  box-shadow: inset 0 1px 0 #3a393a, 0 0 0 1px #000;
}
.panel { padding: 16px 20px; min-height: 320px; }
.panel[hidden] { display: none; }

/* rendered markdown from the portal description */
.md { overflow-wrap: anywhere; max-width: 95ch; }
.md > :first-child { margin-top: 0; }
.md h1, .md h2, .md h3, .md h4 { color: var(--heading); line-height: 1.25; margin: 1.3em 0 .5em; }
.md h1 { font-size: 1.5rem; }
.md h2 { font-size: 1.25rem; }
.md h3 { font-size: 1.08rem; }
.md img { max-width: 100%; height: auto; }
.md code { padding: 1px 5px; background: #171617; border-radius: 2px; font-size: .9em; }
.md pre { padding: 10px 12px; background: #171617; border-radius: 2px; overflow-x: auto; }
.md pre code { padding: 0; }
.md table { border-collapse: collapse; display: block; overflow-x: auto; }
.md th, .md td { padding: 4px 10px; border: 1px solid #3d3c3d; }
.md th { background: #2e2d2e; color: var(--heading); }
.md hr { border: 0; border-top: 1px solid #3d3c3d; }
.md blockquote { margin: 0; padding: 2px 14px; border-left: 3px solid var(--orange); color: var(--muted); }

.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.gallery a { display: block; padding: 6px; background: #171617; border-radius: 2px; }
.gallery a:hover { outline: 2px solid var(--orange); }
.gallery img { display: block; width: 100%; height: auto; }

.changes article + article { margin-top: 18px; padding-top: 14px; border-top: 1px solid #3d3c3d; }
.changes header { display: flex; align-items: baseline; gap: 12px; }
.changes h3 { margin: 0; color: var(--heading); font-size: 1.1rem; }
.changes time { color: var(--muted); font-size: .85rem; }
.changes h4 { margin: 8px 0 2px; font-size: .9rem; color: var(--orange); }
.changes ul { margin: 0; padding-left: 20px; }

.versions { width: 100%; border-collapse: collapse; font-size: .95rem; }
.versions th { text-align: left; color: var(--heading); font-weight: 700; padding: 4px 8px; }
.versions td { padding: 6px 8px; border-top: 1px solid #343334; }
.versions td:last-child, .versions th:last-child { text-align: right; }

.missing { padding: 40px; text-align: center; color: var(--muted); }

.nav { display: flex; gap: 8px; }
.lead { margin: 0 0 12px; color: var(--muted); max-width: 80ch; }
.lead b { color: var(--text); }
/* an inset panel inside an inset panel */
.deep2 { background: #1c1b1c; border-radius: 2px; box-shadow: inset 0 0 0 1px #0d0d0d; }

/* ---------- home: in development ---------- */

.upcoming {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 420px), 1fr));
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.upcoming-card {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 14px;
  padding: 12px;
  align-items: start;
}
.upcoming-card > img, .upcoming-card > .noimg {
  width: 72px;
  height: 72px;
  border-radius: 2px;
  background: var(--deep-2);
  font-size: 1.8rem;
}
.upcoming-card h3 { margin: 0 0 6px; color: var(--heading); font-size: 1.05rem; }
.upcoming-card h3 small { color: var(--muted); font-weight: 400; font-size: .8rem; }
.upcoming-card p { margin: 8px 0 0; font-size: .9rem; }
.upcoming-card .needs { color: var(--muted); font-size: .82rem; }
.upcoming-card .needs b { color: var(--text); font-weight: 600; }

/* segmented progress bar: Concept → In development → Testing → Released */
.stages { display: flex; gap: 2px; margin: 0; padding: 0; list-style: none; }
.stages li {
  flex: 1;
  min-width: 0;
  padding: 1px 4px;
  overflow: hidden;
  background: #1a191a;
  box-shadow: inset 0 0 0 1px #0d0d0d;
  color: #6d6a65;
  font-size: .68rem;
  letter-spacing: .04em;
  text-align: center;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}
.stages li.done { background: #4a3a22; color: #e6c999; }
.stages li.now { background: var(--orange); color: #000; font-weight: 700; }

/* ---------- compatibility table ---------- */

.table-scroll { overflow-x: auto; padding: 4px; }
.compat { width: 100%; border-collapse: collapse; font-size: .9rem; }
.compat th, .compat td { padding: 7px 10px; border-top: 1px solid #343334; text-align: left; vertical-align: top; }
.compat thead th { border-top: 0; color: var(--heading); font-weight: 700; white-space: nowrap; }
.compat tbody th { font-weight: 600; white-space: nowrap; }
.compat tbody th a { color: var(--heading); }
.compat a { text-decoration: none; }
.compat a:hover { color: var(--orange); text-decoration: underline; }
.compat .deps { min-width: 15em; line-height: 1.6; }
.compat tbody tr:hover { background: #2e2b27; }
.compat .v { width: 3.2em; text-align: center; }
.compat .yes { color: var(--green-hi); font-weight: 700; }
.compat .na { color: #5e5c58; }
.pill { display: inline-block; padding: 0 8px; border-radius: 2px; font-size: .8rem; font-weight: 600; white-space: nowrap; }
.pill.req { background: var(--orange); color: #000; }
.pill.opt { background: #3f5a40; color: #d6f2d7; }

/* ---------- mod page: download chart ---------- */

.downloads .stats { margin-bottom: 14px; }
.chart { position: relative; }
.chart svg { display: block; overflow: visible; }
.chart .grid { stroke: #383738; stroke-width: 1; }
.chart .axis { fill: var(--muted); font: 12px "Titillium Web", sans-serif; }
.chart .area { fill: var(--orange); opacity: .1; }
.chart .line { fill: none; stroke: var(--orange); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .dot { fill: var(--orange); stroke: var(--deep); stroke-width: 2; }
.chart .cross { stroke: var(--muted); stroke-width: 1; }
.tip {
  position: absolute;
  transform: translate(-50%, -100%);
  padding: 6px 10px;
  border-radius: 2px;
  background: #121112;
  box-shadow: 0 0 0 1px #000, 0 0 0 2px #4c4b4c, 0 4px 10px #000a;
  font-size: .82rem;
  line-height: 1.35;
  white-space: nowrap;
  pointer-events: none;
}
.tip b { color: var(--heading); }
.tip .rel { color: var(--orange); }
.chart-empty { margin: 0; color: var(--muted); }
.chart-table { margin-top: 12px; }
.chart-table summary { color: var(--link); cursor: pointer; }

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

@media (max-width: 560px) {
  .titlebar { flex-wrap: wrap; padding: 8px 0; }
  .titlebar .drag { display: none; }
  .titlebar h1 { flex: 1; }
  .nav { width: 100%; }
  .nav .btn { flex: 1; justify-content: center; }
  /* only the current stage keeps its label; the others are plain segments */
  .stages li { min-height: 1.3em; }
  .stages li:not(.now) { font-size: 0; }
  .stages li.now { flex: 3; }
  .upcoming-card { grid-template-columns: 52px minmax(0, 1fr); }
  .upcoming-card > img, .upcoming-card > .noimg { width: 52px; height: 52px; }
}

@media (max-width: 780px) {
  .window { padding: 0 8px 8px; }
  .inner { padding: 8px; }
  .titlebar h1 { font-size: 1.15rem; }
  .mod { grid-template-columns: 1fr; }
  .side .slot { max-width: 220px; margin: 0 auto; }
  .row { grid-template-columns: 48px 1fr; }
  .row img, .row .noimg { width: 48px; height: 48px; }
  .row .meta { grid-column: 2; text-align: left; }
  .panel { padding: 12px; }
  .stat { flex: 1; min-width: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .track { animation: none; }
  .belt { overflow-x: auto; -webkit-mask-image: none; mask-image: none; }
  .track [aria-hidden="true"] { display: none; }
  .card, .card.hot { transition: none; transform: none; }
}