/* ==========================================================================
   RETRO OS · site kit
   The shared Retro OS components for the standalone web pages (/resources,
   /skills). Everything is scoped to .rs so it can't touch the Next.js site.
   Components only one page uses live in that page's own <style> block.
   Link fonts.css first.
   ========================================================================== */

/* ---------- tokens ---------- */
.rs {
  --ink: #1E1E1E; --ink-86: rgba(30,30,30,.86); --ink-55: rgba(30,30,30,.55);
  --paper: #FEFEFE; --win: #DEDEDE; --win-2: #C4C4C4; --boot: #E2E2E2; --green: #03AA5C;
  --pink: #F386A1; --teal: #09AEA1; --sage: #ABBAB9; --magenta: #D45BB6;
  --f-display: "Inter Tight", "Helvetica Neue", Arial, sans-serif;
  --f-pixel: "VT323", "Courier New", monospace;
  --f-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  --bg: var(--paper); --fg: var(--ink-86); --knock: var(--paper);
  font-family: var(--f-display); font-size: 17px; line-height: 1.3; letter-spacing: .01em;
  color: var(--ink-86); background: var(--paper);
  -webkit-font-smoothing: antialiased; text-align: left;
}
.rs *, .rs *::before, .rs *::after { box-sizing: border-box; }
.rs :where(h1, h2, h3, h4, p, ul, ol, pre, figure, blockquote) { margin: 0; padding: 0; }
.rs :where(ul, ol) { list-style: none; }
:where(.rs) img { display: block; max-width: 100%; height: auto; }
:where(.rs) a { color: inherit; }
.rs .nc { text-transform: none; }

/* ---------- worlds: hard-cut full-bleed color zones ---------- */
.rs-world { background: var(--bg); color: var(--fg); border-top: 1px solid var(--ink); position: relative; }
.rs-world--ink { --bg: var(--ink); --fg: var(--paper); --knock: var(--ink); }
.rs-wrap { max-width: 1180px; margin: 0 auto; padding: 72px 32px; position: relative; }
.rs-dots { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4' shape-rendering='crispEdges'%3E%3Crect width='1' height='1' fill='%231e1e1e' fill-opacity='.5'/%3E%3C/svg%3E"); background-size: 4px 4px; }
.rs-dots--paper { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4' shape-rendering='crispEdges'%3E%3Crect width='1' height='1' fill='%23fefefe' fill-opacity='.22'/%3E%3C/svg%3E"); background-size: 4px 4px; }
.rs-corners { position: absolute; top: 14px; left: 0; right: 0; display: flex; justify-content: space-between; padding: 0 16px; font: 300 12px/1 var(--f-mono); letter-spacing: .05em; pointer-events: none; }
.rs-corners::before { content: "\2235\00a0\2A46"; }
.rs-corners::after  { content: "\2A46\00a0\2235"; }

/* ---------- type ---------- */
.rs-display { font-family: var(--f-display); font-weight: 600; font-size: clamp(72px, 15vw, 210px); line-height: .8; letter-spacing: -.055em; text-transform: capitalize; }
.rs-h2 { font-family: var(--f-display); font-weight: 600; font-size: clamp(44px, 7vw, 96px); line-height: .84; letter-spacing: -.045em; text-transform: capitalize; }
.rs-h3 { font-family: var(--f-display); font-weight: 600; font-size: clamp(30px, 3.4vw, 44px); line-height: .9; letter-spacing: -.035em; text-transform: capitalize; }
.rs-lead { font-size: clamp(20px, 2.1vw, 26px); line-height: 1.18; letter-spacing: -.005em; }
.rs-micro { font: 400 12px/1.3 var(--f-mono); letter-spacing: .06em; text-transform: capitalize; }
.rs-pixel { font-family: var(--f-pixel); font-size: 22px; line-height: 1; }
.rs-mask { background: var(--bg); }

/* ---------- micrographics ---------- */
.rs-rule { border-left: 1px solid currentColor; padding: 0 0 2px 12px; display: flex; flex-direction: column; gap: 14px; }
.rs-rule--dashed { border-left-style: dashed; }
.rs-crop { --c: currentColor; position: relative; padding: 22px 26px 26px;
  background:
    linear-gradient(var(--c),var(--c)) top left/14px 1px, linear-gradient(var(--c),var(--c)) top left/1px 14px,
    linear-gradient(var(--c),var(--c)) top right/14px 1px, linear-gradient(var(--c),var(--c)) top right/1px 14px,
    linear-gradient(var(--c),var(--c)) bottom left/14px 1px, linear-gradient(var(--c),var(--c)) bottom left/1px 14px,
    linear-gradient(var(--c),var(--c)) bottom right/14px 1px, linear-gradient(var(--c),var(--c)) bottom right/1px 14px;
  background-repeat: no-repeat; }
.rs-inv { display: inline-block; background: var(--ink); color: var(--knock); font: 400 24px/1 var(--f-pixel); padding: 3px 6px 5px; white-space: nowrap; }
.rs-world--ink .rs-inv { background: var(--paper); color: var(--ink); }
.rs-cursor::after { content: "\2588"; margin-left: 2px; animation: rs-blink 1s steps(1) infinite; }
@keyframes rs-blink { 0%, 49.9% { opacity: 1; } 50%, 100% { opacity: 0; } }

/* ---------- window ---------- */
.rs-win { background: var(--paper); border: 1px solid var(--ink); box-shadow: 3px 3px 0 var(--ink-55); color: var(--ink); display: flex; flex-direction: column; min-width: 0; }
.rs-world--ink .rs-win { border-color: var(--paper); box-shadow: 3px 3px 0 rgba(254,254,254,.3); }
.rs-win__bar { background: var(--ink); color: var(--paper); font: 400 22px/1 var(--f-pixel); padding: 2px 8px 4px; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.rs-win__body { margin: 2px; border: 1px solid var(--ink); background: var(--win); padding: 14px 16px; flex: 1 0 auto; }
.rs-win--paper .rs-win__body { background: var(--paper); }

/* ---------- buttons ---------- */
.rs-btns { display: flex; flex-wrap: wrap; gap: 8px; }
.rs-btn { display: inline-block; font: 400 24px/1 var(--f-pixel); background: var(--ink); color: var(--paper); border: 0; padding: 6px 12px 8px; text-decoration: none; cursor: pointer; }
.rs-btn:hover, .rs-btn:focus-visible { background: var(--paper); color: var(--ink); outline: 1px solid var(--ink); }
.rs-btn--ghost { background: transparent; color: inherit; outline: 1px solid currentColor; }
.rs-btn--go { background: var(--green); color: var(--paper); }
.rs-world--ink .rs-btn { background: var(--paper); color: var(--ink); }
.rs-world--ink .rs-btn:hover { background: var(--ink); color: var(--paper); outline-color: var(--paper); }

/* ---------- hero (the grid is per page) ---------- */
.rs-hero .rs-wrap { padding-top: 88px; padding-bottom: 64px; }
.rs-hero__top { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 28px; }
.rs-hero__top a { text-decoration: none; }
.rs-hero__top a:hover { background: var(--ink); color: var(--pink); }
.rs-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--ink); margin-top: 56px; }
.rs-stat { padding: 16px 16px 4px 0; }
.rs-stat + .rs-stat { border-left: 1px solid var(--ink); padding-left: 16px; }
.rs-stat__n { font-weight: 600; font-size: clamp(44px, 6vw, 80px); line-height: .9; letter-spacing: -.05em; }
.rs-nav { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 28px; }
.rs-nav a { background: var(--paper); color: var(--ink-86); text-decoration: none; font-weight: 500; font-size: 16px; padding: 7px 8px 8px; line-height: 1; }
.rs-nav a:hover { background: var(--ink); color: var(--paper); }

/* ---------- index rows (the column layout is per page) ---------- */
.rs-index { border-top: 1px solid var(--ink); margin-top: 36px; }
.rs-row__n { font: 400 30px/1 var(--f-pixel); padding-left: 6px; }
.rs-row__what { font-size: 16px; line-height: 1.2; opacity: .85; }

/* ---------- big number + star list ---------- */
.rs-starline { display: grid; grid-template-columns: auto 1fr; gap: 6px 24px; align-items: end; }
.rs-starline__n { font-weight: 600; font-size: clamp(64px, 8vw, 112px); line-height: .8; letter-spacing: -.055em; font-variant-numeric: tabular-nums; }
.rs-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 28px; font-size: 16px; line-height: 1.28; }
.rs-list li { display: grid; grid-template-columns: 16px 1fr; gap: 8px; }
.rs-list li::before { content: "\2723"; font-family: var(--f-pixel); font-size: 18px; line-height: 1.1; }

/* ---------- footer ---------- */
.rs-foot .rs-wrap { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: end; }
.rs-b64 { font: 400 10px/1.2 var(--f-mono); letter-spacing: .02em; word-break: break-all; opacity: .7; margin-top: 36px; }
.rs-b64::before { content: "[B.64]"; display: block; margin-bottom: 8px; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .rs-wrap { padding: 56px 20px; }
  .rs-list, .rs-foot .rs-wrap { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 520px) {
  .rs-stat__n { font-size: 38px; }
}
@media (prefers-reduced-motion: reduce) {
  .rs-cursor::after { animation: none; }
}