/* downloads.fpga.ch
   IBM Plex (OFL) self-hosted · Phosphor icons (MIT) inline sprite */

@font-face { font-family: "Plex Sans"; src: url("fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Plex Sans"; src: url("fonts/ibm-plex-sans-latin-500-normal.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Plex Sans"; src: url("fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Plex Mono"; src: url("fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Plex Mono"; src: url("fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2"); font-weight: 500; font-display: swap; }

:root {
  /* page */
  --paper: #F2F4F7;
  --surface: #FFFFFF;
  --ink: #18202B;
  --ink-2: #4A5566;
  --ink-3: #7A8596;
  --rule: #D9DFE7;
  --rule-2: #E8ECF1;
  --accent: #5B4BDB;
  --accent-hover: #4A3BC4;

  /* hero (always dark: a patch of FPGA fabric) */
  --die: #131A24;
  --die-ink: #F3F5F8;
  --die-ink-2: #AEB8C6;
  --die-ink-3: #7E8A9B;
  --die-line: rgba(255, 255, 255, .09);
  --net-a: #9A8FF6;
  --net-b: #4FC2CC;
  --net-c: rgba(255, 255, 255, .42);

  --sans: "Plex Sans", -apple-system, "Segoe UI", sans-serif;
  --mono: "Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0F141A;
    --surface: #161D26;
    --ink: #E5E9EF;
    --ink-2: #A8B2C0;
    --ink-3: #7B8697;
    --rule: #2A3443;
    --rule-2: #212A36;
    --accent: #8C80F2;
    --accent-hover: #A197F5;
    --die: #0B1017;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 16px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
code { font-family: var(--mono); font-size: .86em; }
h1, h2, h3, h4 { margin: 0; letter-spacing: -.012em; }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.ph { width: 1.15em; height: 1.15em; fill: currentColor; flex: none; vertical-align: -0.2em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* ---------------- hero ---------------- */
.hero { position: relative; overflow: hidden; background: var(--die); color: var(--die-ink); }
.fabric {
  position: absolute; inset: 0; width: 100%; height: 100%;
  -webkit-mask-image: linear-gradient(100deg, transparent 44%, rgba(0,0,0,.35) 58%, #000 80%);
          mask-image: linear-gradient(100deg, transparent 44%, rgba(0,0,0,.35) 58%, #000 80%);
}
.fabric .clb { fill: rgba(255, 255, 255, .03); stroke: rgba(255, 255, 255, .07); stroke-width: 1; }
.fabric .clb.on { fill: rgba(154, 143, 246, .22); stroke: rgba(154, 143, 246, .55); }
.fabric .net { fill: none; stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round;
  stroke-dasharray: 1; stroke-dashoffset: 1; animation: route 1.6s cubic-bezier(.5, 0, .2, 1) forwards; }
.fabric .net-a { stroke: var(--net-a); }
.fabric .net-b { stroke: var(--net-b); }
.fabric .net-c { stroke: var(--net-c); stroke-width: 2; }
.fabric .pin { opacity: 0; animation: pin .3s ease-out forwards; }
.fabric .pin-a { fill: var(--net-a); }
.fabric .pin-b { fill: var(--net-b); }
.fabric .pin-c { fill: #DCE2EA; }
.fabric .n1 { animation-delay: .15s; } .fabric .n2 { animation-delay: .35s; }
.fabric .n3 { animation-delay: .5s; }  .fabric .n4 { animation-delay: .65s; }
.fabric .pin.n0 { animation-delay: 1.3s; } .fabric .pin.n1 { animation-delay: 1.45s; } .fabric .pin.n2 { animation-delay: 1.65s; }
.fabric .pin.n3 { animation-delay: 1.8s; } .fabric .pin.n4 { animation-delay: 1.95s; }
@keyframes route { to { stroke-dashoffset: 0; } }
@keyframes pin { to { opacity: 1; } }

.hero-inner { position: relative; max-width: 1080px; margin: 0 auto; padding: 24px 32px 56px; }

.topline { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 72px; }
.wordmark { display: inline-flex; align-items: center; gap: 10px; color: var(--die-ink); text-decoration: none; font-weight: 600; font-size: 17px; }
.mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px; background: #5B4BDB; color: #fff; font-size: 19px; }

.switch { position: relative; display: inline-flex; gap: 2px; padding: 3px; border-radius: 10px; background: color-mix(in srgb, var(--die) 82%, #fff 8%); border: 1px solid var(--die-line); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
.switch a { display: inline-flex; align-items: center; gap: 7px; padding: 6px 14px; border-radius: 7px; color: var(--die-ink-2); text-decoration: none; font-size: 14px; font-weight: 500; }
.switch a:hover { color: var(--die-ink); background: rgba(255, 255, 255, .06); }
.switch a.on { background: var(--die-ink); color: var(--die); }
.switch a.on .ph { color: #5B4BDB; }

.lead { max-width: 640px; }
.lead h1 { font-size: clamp(40px, 6.4vw, 68px); line-height: 1.02; font-weight: 600; letter-spacing: -.03em; }
.lead h1 .version { font-weight: 400; color: var(--die-ink-2); font-variant-numeric: tabular-nums; }
.sub { margin-top: 14px; color: var(--die-ink-2); font-size: 17px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.chan { display: inline-flex; align-items: center; height: 24px; padding: 0 10px; border-radius: 999px; font-size: 13px; font-weight: 600;
  background: rgba(79, 194, 204, .16); color: var(--net-b); border: 1px solid rgba(79, 194, 204, .35); }
.desc { margin-top: 12px; color: var(--die-ink-3); max-width: 56ch; font-size: 15px; }

.get { display: flex; align-items: flex-start; gap: 28px 36px; flex-wrap: wrap; margin-top: 36px; }
.btn-download {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 14px 22px 14px 18px; border-radius: 12px;
  background: #5B4BDB; color: #fff; text-decoration: none;
  box-shadow: 0 0 0 1px rgba(255,255,255,.08) inset, 0 10px 30px rgba(91, 75, 219, .35);
  transition: background-color .15s, transform .15s;
}
.btn-download:hover { background: #6A5BE6; }
.btn-download:active { transform: translateY(1px); }
.btn-download .ph { font-size: 28px; }
.btn-download span { display: flex; flex-direction: column; line-height: 1.25; }
.btn-download b { font-size: 18px; font-weight: 600; }
.btn-download small { font-size: 13px; opacity: .82; }

.btn-ghost { display: inline-flex; align-items: center; gap: 8px; margin-top: 24px; padding: 10px 16px; border-radius: 10px;
  border: 1px solid var(--die-line); color: var(--die-ink); text-decoration: none; }
.btn-ghost:hover { background: rgba(255,255,255,.06); }

.reqs { list-style: none; margin: 4px 0 0; padding: 0; display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--die-ink-2); }
.reqs li { display: flex; align-items: center; gap: 9px; }
.reqs .ph { color: var(--die-ink-3); }
.reqs code { color: var(--die-ink); }

.copy { display: inline-grid; place-items: center; width: 28px; height: 28px; margin: -4px 0; border: 0; border-radius: 7px;
  background: transparent; color: inherit; cursor: pointer; font-size: 16px; opacity: .75; }
.copy:hover { opacity: 1; background: rgba(127, 127, 127, .16); }
.copy.done { color: #52C48D; opacity: 1; }

/* ---------------- body ---------------- */
.body { max-width: 1080px; margin: 0 auto; padding: 48px 32px 24px; display: grid; gap: 52px; }
.body section { max-width: 760px; }
.body h2 { font-size: 22px; font-weight: 600; margin-bottom: 16px; }

.notes { color: var(--ink-2); }
.notes > :first-child { margin-top: 0; }
.notes h3, .notes h4 { color: var(--ink); font-size: 16px; font-weight: 600; margin: 22px 0 6px; }
.notes p { margin: 0 0 12px; }
.notes ul, .notes ol { margin: 0 0 12px; padding-left: 22px; }
.notes ul { list-style: disc; }
.notes ol { list-style: decimal; }
.notes li { margin: 4px 0; }
.notes li::marker { color: var(--ink-3); }
.notes code { background: var(--rule-2); padding: 1px 5px; border-radius: 4px; color: var(--ink); }
.notes-latest .notes { background: var(--surface); border: 1px solid var(--rule); border-radius: 14px; padding: 22px 26px; }

.hint { display: flex; align-items: center; gap: 8px; color: var(--ink-3); font-size: 14px; margin: -6px 0 14px; }

.builds { list-style: none; margin: 0; padding: 0; background: var(--surface); border: 1px solid var(--rule); border-radius: 14px; overflow: hidden; }
.builds > li + li { border-top: 1px solid var(--rule-2); }
.builds summary {
  display: grid; grid-template-columns: minmax(90px, 1.2fr) 1fr 1.4fr .8fr 20px; align-items: center; gap: 12px;
  padding: 14px 20px; cursor: pointer; list-style: none; font-size: 15px;
}
.builds summary::-webkit-details-marker { display: none; }
.builds summary:hover { background: color-mix(in srgb, var(--rule-2) 50%, transparent); }
.b-ver { font-weight: 600; font-variant-numeric: tabular-nums; }
.b-build, .b-date, .b-size { color: var(--ink-3); font-variant-numeric: tabular-nums; }
.b-size { text-align: right; }
.caret { color: var(--ink-3); transition: transform .15s; }
details[open] .caret { transform: rotate(180deg); }
.b-body { padding: 4px 20px 20px; }
.b-body .notes { font-size: 15px; margin-bottom: 14px; }
.b-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; font-size: 13.5px; color: var(--ink-3); }
.b-meta > span { display: inline-flex; align-items: center; gap: 7px; }
.b-meta .sum code { word-break: break-all; color: var(--ink-2); }
.btn-small { display: inline-flex; align-items: center; gap: 7px; padding: 6px 12px; border-radius: 8px;
  border: 1px solid var(--rule); background: var(--paper); color: var(--ink); text-decoration: none; font-weight: 500; }
.btn-small:hover { border-color: var(--accent); color: var(--accent); }

.steps { counter-reset: step; list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.steps li { counter-increment: step; position: relative; padding-left: 44px; color: var(--ink-2); }
.steps li::before {
  content: counter(step); position: absolute; left: 0; top: -1px;
  display: grid; place-items: center; width: 28px; height: 28px; border-radius: 8px;
  background: var(--surface); border: 1px solid var(--rule); color: var(--accent); font-weight: 600; font-size: 14px;
}
.steps b { color: var(--ink); font-weight: 600; }
.verify { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; margin-top: 18px; font-size: 14px; color: var(--ink-3); }
.verify .ph { align-self: center; }
.verify code { background: var(--surface); border: 1px solid var(--rule); padding: 2px 7px; border-radius: 6px; color: var(--ink); word-break: break-all; }

.foot { max-width: 1080px; margin: 0 auto; padding: 32px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  color: var(--ink-3); font-size: 14px; border-top: 1px solid var(--rule); }
.foot a { color: var(--ink-2); text-decoration: none; display: inline-flex; align-items: center; gap: 7px; }
.foot a:hover { color: var(--accent); }

/* ---------------- small screens ---------------- */
@media (max-width: 640px) {
  .hero-inner { padding: 16px 16px 40px; }
  .topline { margin-bottom: 44px; }
  .switch a { padding: 6px 10px; }
  .fabric { -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0,0,0,.25) 55%, transparent 90%);
                    mask-image: linear-gradient(180deg, #000 0%, rgba(0,0,0,.25) 55%, transparent 90%); opacity: .7; }
  .btn-download { width: 100%; }
  .body { padding: 36px 16px 16px; gap: 40px; }
  .notes-latest .notes { padding: 18px; }
  .builds summary { grid-template-columns: 1fr auto 20px; padding: 13px 16px; }
  .b-build, .b-date { display: none; }
  .b-body { padding: 4px 16px 18px; }
  .foot { padding: 24px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  .fabric .net { animation: none; stroke-dashoffset: 0; }
  .fabric .pin { animation: none; opacity: 1; }
  * { transition: none !important; }
}