/* Rasterion · Rasterium · Retrarium – one retro family, three phosphors.
   Plain CSS. Pixel fonts: Silkscreen and Pixelify Sans; text: IBM Plex Mono (all SIL OFL, fonts/). */

@font-face { font-family: "Silkscreen"; src: url("fonts/Silkscreen-Regular.ttf") format("truetype"); font-display: swap; }
@font-face { font-family: "Pixelify"; src: url("fonts/PixelifySans-Medium.ttf") format("truetype"); font-display: swap; }
@font-face { font-family: "Plex Mono"; src: url("fonts/IBMPlexMono-Regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Plex Mono"; src: url("fonts/IBMPlexMono-Bold.ttf") format("truetype"); font-weight: 700; font-display: swap; }

:root {
  --px: "Silkscreen", "Courier New", monospace;
  --px2: "Pixelify", "Silkscreen", monospace;
  --mono: "Plex Mono", Consolas, "Courier New", monospace;
  --fg: #4a90d9; --bg: #08142a; --bg2: #0d1f3d; --hi: #ffffff; --dim: rgba(74, 144, 217, .55);
  --glow: 0 0 6px rgba(74, 144, 217, .55), 0 0 18px rgba(74, 144, 217, .25);
}
body[data-theme="rasterium"] {
  --fg: #33ff33; --bg: #0b120d; --bg2: #0d1410; --hi: #c8ffc8; --dim: rgba(51, 255, 51, .5);
  --glow: 0 0 5px rgba(51, 255, 51, .6), 0 0 16px rgba(51, 255, 51, .25);
}
body[data-theme="retrarium"] {
  --fg: #ffb000; --bg: #140f0a; --bg2: #1c1712; --hi: #ffe2a6; --dim: rgba(255, 176, 0, .5);
  --glow: 0 0 5px rgba(255, 176, 0, .6), 0 0 16px rgba(255, 176, 0, .25);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.65 var(--mono);
  text-shadow: var(--glow);
  overflow-x: hidden;
}
img { image-rendering: pixelated; }
a { color: var(--hi); text-decoration: none; border-bottom: 2px dotted var(--dim); }
a:hover { background: var(--fg); color: var(--bg); text-shadow: none; border-bottom-color: transparent; }
::selection { background: var(--fg); color: var(--bg); }

/* the CRT: scanlines, a slow roll bar and a soft vignette over everything */
body::before, body::after {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 50;
}
body::before {
  background: repeating-linear-gradient(to bottom, rgba(0, 0, 0, .28) 0 1px, transparent 1px 3px);
  mix-blend-mode: multiply;
}
body::after {
  background:
    linear-gradient(to bottom, transparent 0, rgba(255, 255, 255, .035) 48%, transparent 52%) 0 0 / 100% 300% no-repeat,
    radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 0, .55) 100%);
  animation: roll 9s linear infinite;
}
@keyframes roll { from { background-position: 0 -100%, 0 0; } to { background-position: 0 200%, 0 0; } }

/* stepped "pixel" corners, the same notch as the brand tiles */
.notch {
  clip-path: polygon(0 8px, 4px 8px, 4px 4px, 8px 4px, 8px 0, calc(100% - 8px) 0, calc(100% - 8px) 4px, calc(100% - 4px) 4px,
    calc(100% - 4px) 8px, 100% 8px, 100% calc(100% - 8px), calc(100% - 4px) calc(100% - 8px), calc(100% - 4px) calc(100% - 4px),
    calc(100% - 8px) calc(100% - 4px), calc(100% - 8px) 100%, 8px 100%, 8px calc(100% - 4px), 4px calc(100% - 4px),
    4px calc(100% - 8px), 0 calc(100% - 8px));
}

/* top bar: the three names as tabs */
.bar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 4px; flex-wrap: wrap;
  padding: 10px 18px;
  background: var(--bg);
  border-bottom: 4px solid var(--fg);
  font: 13px var(--px);
}
.bar .home { display: flex; align-items: center; gap: 10px; border: 0; margin-right: auto; color: var(--fg); letter-spacing: .12em; }
.bar .home img { height: 22px; }
.bar .home:hover { background: none; color: var(--hi); }
.bar a.tab { border: 0; padding: 4px 12px; color: var(--fg); letter-spacing: .1em; }
.bar a.tab:hover, .bar a.tab[aria-current] { background: var(--fg); color: var(--bg); text-shadow: none; }

/* layout */
.wrap { max-width: 1060px; margin: 0 auto; padding: 0 22px; }
section { padding: 70px 0 30px; }
h1, h2, h3 { font-family: var(--px); font-weight: 400; letter-spacing: .08em; line-height: 1.2; margin: 0 0 .6em; color: var(--hi); }
h1 { font-size: clamp(34px, 7vw, 76px); }
h2 { font-size: clamp(22px, 3.4vw, 34px); }
h2::before { content: "> "; color: var(--fg); }
h3 { font-family: var(--px2); font-size: 20px; letter-spacing: .04em; }
p { max-width: 70ch; }
.lead { font-size: 17px; color: var(--hi); }
.muted { color: var(--dim); }
.kbd { font-family: var(--px); font-size: 12px; padding: 1px 6px; border: 2px solid var(--fg); }

/* a blinking block cursor */
.cur { display: inline-block; width: .62em; height: 1.05em; background: var(--fg); vertical-align: -.15em; animation: blink 1s steps(1) infinite; box-shadow: var(--glow); }
@keyframes blink { 50% { opacity: 0; } }

/* screens: a framed CRT with a border area, like the old machines */
.screen {
  position: relative;
  background: var(--bg2);
  border: 4px solid var(--fg);
  box-shadow: 0 0 0 4px var(--bg), 0 0 0 8px var(--dim), 0 0 40px rgba(0, 0, 0, .6) inset, var(--glow);
}
.terminal { font: 16px/1.5 var(--px); letter-spacing: .06em; white-space: pre-wrap; padding: 22px 26px; min-height: 340px; }
.terminal .inv { background: var(--fg); color: var(--bg); text-shadow: none; padding: 0 4px; }

/* hero */
.hero { min-height: calc(100vh - 50px); display: grid; place-items: center; padding: 30px 0; position: relative; }
.hero canvas { display: block; max-width: 100%; image-rendering: pixelated; }
.skip { position: absolute; right: 18px; bottom: 18px; font: 11px var(--px); color: var(--dim); background: none; border: 2px solid var(--dim); padding: 6px 10px; cursor: pointer; letter-spacing: .1em; }
.skip:hover { color: var(--bg); background: var(--fg); }
.scroll-on { position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%); font: 12px var(--px); letter-spacing: .2em; color: var(--dim); animation: blink 1.2s steps(1) infinite; border: 0; }

/* cards: cartridges */
.carts { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 22px; margin-top: 26px; }
.cart {
  display: block; border: 0; color: var(--fg);
  background: var(--bg2); padding: 22px 22px 20px; position: relative;
  outline: 3px solid var(--fg); outline-offset: -3px;
  transition: transform .15s steps(3);
}
.cart:hover { transform: translateY(-6px); background: var(--bg2); color: var(--fg); }
.cart img { height: 84px; display: block; margin-bottom: 16px; }
.cart h3 { margin-bottom: .3em; }
.cart .dom { font: 11px var(--px); letter-spacing: .15em; color: var(--dim); }
.cart .go { font: 12px var(--px); letter-spacing: .12em; margin-top: 12px; display: inline-block; }
.cart:hover .go { background: var(--fg); color: var(--bg); text-shadow: none; padding: 0 6px; }

/* the module cartridges on the company page */
.modules { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 18px; margin-top: 24px; }
.modules figure { margin: 0; text-align: center; }
.modules img { width: 100%; max-width: 170px; transition: transform .2s steps(4), filter .2s; filter: saturate(.85); }
.modules figure:hover img { transform: translateY(-8px) rotate(-2deg); filter: saturate(1.15) drop-shadow(0 0 12px var(--dim)); }
.modules figcaption { font: 11px var(--px); letter-spacing: .14em; color: var(--dim); margin-top: 6px; }

/* listings: BASIC programs and directories */
.listing { font: 15px/1.55 var(--px); letter-spacing: .05em; white-space: pre; overflow-x: auto; padding: 20px 24px; }
.listing .ln { color: var(--dim); }

/* keyboards */
.rail { margin-top: 24px; }
.rail .stage { padding: 18px; display: grid; place-items: center; height: min(56vw, 480px); }
.rail .stage img { width: 100%; height: 100%; max-width: 900px; object-fit: contain; image-rendering: auto; filter: drop-shadow(0 8px 20px rgba(0, 0, 0, .6)); }
.rail .ctl { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 12px; font: 14px var(--px); letter-spacing: .08em; }
.rail button {
  font: 14px var(--px); color: var(--fg); background: var(--bg2); border: 3px solid var(--fg);
  padding: 6px 14px; cursor: pointer; text-shadow: var(--glow);
}
.rail button:hover { background: var(--fg); color: var(--bg); text-shadow: none; }
.rail .name { text-align: center; flex: 1; color: var(--hi); }
.rail .dots { display: flex; gap: 6px; justify-content: center; margin-top: 12px; flex-wrap: wrap; }
.rail .dots i { width: 10px; height: 10px; background: var(--dim); cursor: pointer; }
.rail .dots i.on { background: var(--fg); box-shadow: var(--glow); }

/* feature list with pixel bullets */
ul.px { list-style: none; padding: 0; margin: 18px 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 10px 26px; }
ul.px li { padding-left: 24px; position: relative; }
ul.px li::before { content: ""; position: absolute; left: 0; top: .55em; width: 10px; height: 10px; background: var(--fg); box-shadow: var(--glow); }

/* bars built from block characters */
.blocks { font: 15px/1.7 var(--mono); white-space: pre; overflow-x: auto; }

/* footer */
footer { margin-top: 60px; padding: 26px 22px 40px; border-top: 4px solid var(--fg); font: 12px var(--px); letter-spacing: .12em; color: var(--dim); text-align: center; }
footer a { border: 0; color: var(--fg); }

/* raster bars: the party mode (↑↑↓↓←→←→BA) */
#party { position: fixed; inset: 0; pointer-events: none; z-index: 45; mix-blend-mode: screen; opacity: 0; transition: opacity .4s; }
body.party #party { opacity: .55; }

@media (prefers-reduced-motion: reduce) {
  body::after, .cur, .scroll-on { animation: none; }
}
@media (max-width: 640px) {
  .terminal, .listing { font-size: 12px; padding: 14px; }
  .bar { font-size: 11px; }
}