/* SPDX-License-Identifier: MIT -- SteamRoller website */
:root {
  --bg: #0b0b0b;
  --panel: #151515;
  --line: #2a2a2a;
  --fg: #ece8e1;
  --dim: #9c968d;
  --orange: #ff8c00;
  --yellow: #ffd600;
  --blue: #14a5fe;
  --ok: #60e080;
  --bad: #ff5a4a;
  --max: 900px;
  --head: "Archivo Black", Impact, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.65 "IBM Plex Sans", system-ui, sans-serif; }
a { color: var(--yellow); text-underline-offset: 3px; }
a:hover { color: var(--fg); }
code { font-family: var(--mono); font-size: 0.9em; background: var(--panel); padding: 0.05em 0.35em; }
img { max-width: 100%; }

/* header: brand left, navigation right */
.bar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 24px;
       padding: 14px max(20px, calc((100vw - var(--max)) / 2)); background: rgba(11, 11, 11, 0.94);
       border-bottom: 3px solid var(--orange); backdrop-filter: blur(6px); }
.brand { display: flex; align-items: center; gap: 12px; color: var(--fg); text-decoration: none; margin-right: auto; }
.brand img { width: 44px; height: 44px; }
.brand span { font-family: var(--head); font-size: 24px; letter-spacing: 0.02em; transform: skewX(-8deg); display: inline-block; }
.brand b { color: var(--orange); font-weight: normal; }
.bar nav { display: flex; gap: 4px; }
.bar nav a { font-family: var(--mono); font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em;
             color: var(--dim); text-decoration: none; padding: 6px 10px; }
.bar nav a:hover { color: var(--fg); }
.bar nav a[aria-current="page"] { color: var(--bg); background: var(--orange); }
.menu-btn { display: none; font-family: var(--mono); font-size: 13px; letter-spacing: 0.1em; background: none;
            color: var(--fg); border: 2px solid var(--fg); padding: 6px 12px; cursor: pointer; }

main { max-width: var(--max); margin: 0 auto; padding: 48px 20px 60px; }
main h1 { font-family: var(--head); font-weight: normal; font-size: 40px; line-height: 1.1; text-transform: uppercase; margin: 0 0 18px; }
main h2 { font-family: var(--head); font-weight: normal; font-size: 24px; text-transform: uppercase; letter-spacing: 0.02em;
          margin: 56px 0 14px; padding-left: 16px; border-left: 8px solid var(--orange); scroll-margin-top: 90px; }
main h3 { font-size: 20px; font-weight: 600; margin: 32px 0 8px; color: var(--yellow); scroll-margin-top: 90px; }
p.note { color: var(--dim); font-size: 15px; }
p.lead { font-size: 20px; color: var(--dim); max-width: 36em; }

/* buttons */
.btn { display: inline-block; padding: 12px 24px; font: 600 17px "IBM Plex Sans", sans-serif; text-decoration: none; cursor: pointer;
       color: var(--fg); background: transparent; border: 2px solid var(--fg); }
.btn.primary { background: var(--orange); border-color: var(--orange); color: #111; }
.btn:hover { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.btn[disabled] { opacity: 0.35; cursor: not-allowed; }
.btn[disabled]:hover { background: transparent; color: var(--fg); border-color: var(--fg); }
.btn.primary[disabled]:hover { background: var(--orange); color: #111; border-color: var(--orange); }
.btn.small { padding: 6px 14px; font-size: 15px; }
.link { background: none; border: 0; padding: 0; color: var(--yellow); text-decoration: underline; text-underline-offset: 3px; font: inherit; cursor: pointer; }
.cta { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }

/* home */
.hero { padding: 20px 0 10px; }
.hero h1 { font-size: 46px; max-width: 16em; }
.hero h1 em { font-style: normal; color: var(--orange); }
/* features: a plain two-column list, no boxes */
.features { list-style: none; padding: 0; margin: 20px 0 0; }
.features li { display: grid; grid-template-columns: 220px 1fr; gap: 0 28px; padding: 14px 0; border-top: 1px solid var(--line); }
.features li:last-child { border-bottom: 1px solid var(--line); }
.features b { font-size: 18px; }
.features span { color: var(--dim); }

/* documents */
main table { border-collapse: collapse; width: 100%; margin: 14px 0; display: block; overflow-x: auto; }
main th, main td { border-bottom: 1px solid var(--line); padding: 8px 14px 8px 0; vertical-align: top; text-align: left; }
main th { font-family: var(--mono); font-size: 13px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.06em; color: var(--dim); border-bottom: 2px solid var(--orange); }
main td:first-child { white-space: nowrap; font-weight: 600; }
.toc { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 0 24px; margin: 24px 0;
       padding: 18px 20px; background: var(--panel); }
.toc a { display: block; padding: 2px 0; text-decoration: none; font-weight: 600; }
.toc a.sub { padding-left: 14px; font-weight: 400; color: var(--dim); }
.toc a.sub:hover { color: var(--fg); }

/* other projects */
.projects { display: grid; gap: 18px; margin: 30px 0 0; }
.project { --accent: var(--orange); background: var(--panel); padding: 22px 24px 24px; border-left: 6px solid var(--accent); }
.project-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 16px; }
main .project h2 { margin: 0; padding: 0; border: 0; font-size: 26px; }
.device { font-family: var(--mono); color: var(--accent); font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; }
.project > p { margin: 10px 0 0; }
.links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.editions { list-style: none; padding: 0; margin: 16px 0 0; }
.editions li { display: grid; grid-template-columns: 1fr auto; gap: 10px 22px; align-items: center; padding: 14px 0; border-top: 1px solid var(--line); }
.ed-name { font-weight: 600; font-size: 18px; }
.ed-note { color: var(--dim); font-size: 15px; margin: 4px 0 0; }
.ed-links { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.tag { margin-left: 10px; padding: 1px 8px; font-family: var(--mono); font-size: 12px; color: var(--dim); border: 1px solid var(--line); }
.tag.current { color: var(--ok); border-color: var(--ok); }

/* the installer */
.warn { background: #1d1206; border-left: 6px solid var(--bad); padding: 14px 18px; margin: 24px 0; }
.warn p { margin: 0; }
.panel { background: var(--panel); border-top: 4px solid var(--orange); padding: 22px 24px; margin-top: 22px; }
.status { font-family: var(--head); font-size: 22px; text-transform: uppercase; margin: 0 0 6px; }
.status.ok { color: var(--ok); } .status.bad { color: var(--bad); }
.detail { color: var(--dim); margin: 0; white-space: pre-line; }
.dev { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; margin: 14px 0 0; font-family: var(--mono); font-size: 14px; }
.dev dt { color: var(--dim); text-transform: uppercase; }
.dev dd { margin: 0; }
.bar-progress, .progress { height: 14px; background: var(--bg); margin: 18px 0 6px; overflow: hidden; }
.progress > div { height: 100%; width: 0; background: var(--orange); transition: width 0.2s; }
.check { display: flex; gap: 12px; align-items: flex-start; margin: 18px 0; }
.check input { width: 20px; height: 20px; margin-top: 4px; flex: none; accent-color: var(--orange); }
.steps { counter-reset: s; list-style: none; padding: 0; margin: 14px 0 0; }
.steps li { counter-increment: s; position: relative; padding: 2px 0 12px 46px; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 0; width: 32px; height: 32px; background: var(--orange);
                    color: #111; font-family: var(--head); display: grid; place-items: center; }

footer { border-top: 3px solid var(--orange); padding: 22px max(20px, calc((100vw - var(--max)) / 2)) 40px;
         display: flex; flex-wrap: wrap; gap: 18px; align-items: center; justify-content: space-between; color: var(--dim); font-size: 14px; }
.foot { max-width: 640px; }
.foot p { margin: 4px 0; }
.donate input[type="image"] { display: block; }

/* narrow screens: the navigation drops down below the header */
@media (max-width: 760px) {
  .menu-btn { display: block; }
  .bar { flex-wrap: wrap; }
  .bar nav { display: none; width: 100%; flex-direction: column; padding: 8px 0 4px; }
  .menu-open .bar nav { display: flex; }
  .bar nav a { font-size: 15px; padding: 10px 8px; }
  .brand span { font-size: 20px; }
  main { padding-top: 30px; }
  main h1, .hero h1 { font-size: 32px; }
  .features li { grid-template-columns: 1fr; gap: 2px; }
  .editions li { grid-template-columns: 1fr; }
  .ed-links { justify-content: flex-start; }
  main td:first-child { white-space: normal; }
}