/* Federated Industrial Labs — site stylesheet.
 *
 * Visual language: the Workspace_OS "industrial" idiom, mid-2000s plastic.
 * Palette and plastic recipe taken from KONSOLE26 libk26gfx:
 *   plastic box = 4-stop vertical gradient (lighten 40% / lighten 18% at 10%
 *   / base at 55% / darken 14%) with a 1px border at darken 25%,
 *   plus an optional stipple dot-grid on chrome surfaces.
 * Shades below are precomputed with the same linear blend as k26gfx_shade_rgb.
 *
 * No frameworks, no external fetches, no JavaScript. Two distinct interfaces:
 * desktop (>= 768px) and mobile (< 768px), switched by media query.
 *
 * Type: JetBrains Mono, the same family Terra and HyperCat render at 15px.
 * Self-hosted (v2.304, OFL-1.1, licence at /assets/fonts/OFL.txt); browsers
 * antialias where ImGui's atlas does not, but the identity carries.
 */

@font-face {
  font-family: "JetBrains Mono";
  src: local("JetBrains Mono"),
       url("/assets/fonts/JetBrainsMono-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: local("JetBrains Mono Bold"),
       url("/assets/fonts/JetBrainsMono-Bold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  /* Chrome (graphite machine panel) */
  --graphite:        #595957;
  --graphite-hi40:   #9b9b9a;
  --graphite-hi18:   #777775;
  --graphite-lo14:   #4d4d4b;
  --graphite-border: #434341;
  --chrome-deep:     #101012;
  --chrome-text:     #c8c8cc;
  --chrome-text-dim: #9a9a98;

  /* Logo tones */
  --orange:          #d97a12;
  --orange-hi40:     #e8af71;
  --orange-hi18:     #e0923d;
  --orange-lo14:     #bb690f;
  --orange-border:   #a35c0e;
  --charcoal:        #333333;
  --charcoal-hi40:   #858585;
  --charcoal-hi18:   #585858;
  --charcoal-lo14:   #2c2c2c;
  --charcoal-border: #262626;

  /* Amber accents for dark surfaces */
  --amber-hi:        #ffae42;

  /* Light surfaces (paper-white chrome) */
  --ground:          #d8d8dc;
  --panel:           #ececf0;
  --panel-border:    #b1b1b4;
  --well:            #e8e8e8;
  --frame-light:     #ffffff;
  --frame-dark:      #8a8a8c;

  /* Buttons (light plastic) */
  --button:          #c8c8cc;
  --button-hi40:     #dedee0;
  --button-hi18:     #d2d2d5;
  --button-lo14:     #acacaf;
  --button-border:   #969699;

  /* Text on light surfaces */
  --ink:             #101012;
  --ink-dim:         #606064;
  --link:            #8a4400;
  --link-bright:     #cc6600;

  /* Text on orange plastic (amber_dim from the industrial theme) */
  --on-orange:       #331800;

  --font-body: "JetBrains Mono", "DejaVu Sans Mono", Consolas, Menlo, monospace;
  --font-head: "JetBrains Mono", "DejaVu Sans Mono", Consolas, Menlo, monospace;
}

/* ---------- Reset and base ---------- */

* { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--ground);
}

img { max-width: 100%; height: auto; display: block; }

h1, h2, h3, h4 { font-family: var(--font-head); color: var(--ink); }

p + p { margin-top: 0.9em; }

a { color: var(--link); }
a:hover { color: var(--link-bright); }
a:focus-visible,
button:focus-visible,
.nav-button:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

ul, ol { padding-left: 1.4em; }

/* ---------- Plastic primitives ---------- */

.plastic-graphite {
  background-color: var(--graphite);
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.10) 1px, rgba(0, 0, 0, 0) 1.1px),
    linear-gradient(to bottom,
      var(--graphite-hi40) 0%,
      var(--graphite-hi18) 10%,
      var(--graphite) 55%,
      var(--graphite-lo14) 100%);
  background-size: 4px 4px, 100% 100%;
  border: 1px solid var(--graphite-border);
}

.plastic-charcoal {
  background-color: var(--charcoal);
  background-image: linear-gradient(to bottom,
    var(--charcoal-hi40) 0%,
    var(--charcoal-hi18) 10%,
    var(--charcoal) 55%,
    var(--charcoal-lo14) 100%);
  border: 1px solid var(--charcoal-border);
}

.btn {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: bold;
  font-size: 13px;
  text-decoration: none;
  text-align: center;
  color: var(--ink);
  padding: 7px 18px;
  border-radius: 3px;
  background-color: var(--button);
  background-image: linear-gradient(to bottom,
    var(--button-hi40) 0%,
    var(--button-hi18) 10%,
    var(--button) 55%,
    var(--button-lo14) 100%);
  border: 1px solid var(--button-border);
  cursor: pointer;
}
.btn:hover { filter: brightness(1.06); color: var(--ink); }
.btn:active {
  background-image: linear-gradient(to bottom,
    var(--button-lo14) 0%,
    var(--button) 45%,
    var(--button-hi18) 100%);
}

.btn-orange {
  color: var(--on-orange);
  background-color: var(--orange);
  background-image: linear-gradient(to bottom,
    var(--orange-hi40) 0%,
    var(--orange-hi18) 10%,
    var(--orange) 55%,
    var(--orange-lo14) 100%);
  border-color: var(--orange-border);
}
.btn-orange:hover { color: var(--on-orange); }
.btn-orange:active {
  background-image: linear-gradient(to bottom,
    var(--orange-lo14) 0%,
    var(--orange) 45%,
    var(--orange-hi18) 100%);
}

.panel {
  background-color: var(--panel);
  background-image: linear-gradient(to bottom,
    #f4f4f6 0%,
    #efeff3 10%,
    var(--panel) 55%,
    #e2e2e6 100%);
  border: 1px solid var(--panel-border);
  border-radius: 3px;
  padding: 22px 26px;
}

/* Inset well — NeXTSTEP-style data surface inside chrome. */
.well {
  background: var(--well);
  border: 1px solid var(--frame-dark);
  border-bottom-color: var(--frame-light);
  border-right-color: var(--frame-light);
  border-radius: 2px;
  padding: 14px 16px;
}

/* ---------- Masthead ---------- */

.masthead {
  background-color: var(--graphite);
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.10) 1px, rgba(0, 0, 0, 0) 1.1px),
    linear-gradient(to bottom,
      var(--graphite-hi40) 0%,
      var(--graphite-hi18) 10%,
      var(--graphite) 55%,
      var(--graphite-lo14) 100%);
  background-size: 4px 4px, 100% 100%;
  border-bottom: 3px solid var(--orange);
}

.masthead-inner {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.brand-mark {
  width: 44px;
  height: 44px;
  background: var(--panel);
  border: 1px solid var(--charcoal-border);
  border-radius: 3px;
  padding: 4px;
}

.brand-name {
  font-family: var(--font-head);
  font-weight: bold;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: #f0f0f2;
  text-transform: uppercase;
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.45);
}

.brand-name .brand-labs { color: var(--amber-hi); }

.tagline {
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--chrome-text);
}

/* ---------- Navigation ---------- */

/* The menu checkbox: visually hidden, still keyboard focusable so the
 * mobile menu opens with Space and no JavaScript. Removed from the tab
 * order on desktop, where the nav is always visible. */
.nav-toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
}

.nav-toggle:focus-visible ~ .masthead .nav-button {
  outline: 2px solid var(--amber-hi);
  outline-offset: 2px;
}

.nav-button { display: none; }

.site-nav ul { list-style: none; padding: 0; margin: 0; }

.site-nav a {
  font-family: var(--font-head);
  font-weight: bold;
  text-decoration: none;
  color: var(--ink);
}

/* ---------- Layout ---------- */

.page { min-height: 100vh; display: flex; flex-direction: column; }

.content { flex: 1; }

.section-head {
  font-size: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink);
  border-bottom: 2px solid var(--orange);
  padding-bottom: 6px;
  margin-bottom: 14px;
}

.kicker {
  font-family: var(--font-head);
  font-weight: bold;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--link);
  margin-bottom: 6px;
}

.lede { font-size: 15px; color: var(--ink); }

.dim { color: var(--ink-dim); }

.hero h1 {
  font-size: 25px;
  line-height: 1.2;
  border-left: 6px solid var(--orange);
  padding-left: 16px;
  margin-bottom: 14px;
}

.article h1 {
  font-size: 23px;
  line-height: 1.2;
  border-left: 6px solid var(--orange);
  padding-left: 16px;
  margin-bottom: 12px;
}

.article h2 {
  font-size: 16px;
  margin: 1.6em 0 0.5em;
}

.article .standfirst {
  font-size: 15px;
  color: var(--ink-dim);
  margin-bottom: 1.2em;
}

.meta-line {
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-dim);
  border-top: 1px solid var(--panel-border);
  margin-top: 1.8em;
  padding-top: 10px;
}

/* Cards (project / release listings) */

.card { padding: 18px 22px; display: flex; flex-direction: column; }
.card > .card-actions { margin-top: auto; padding-top: 12px; }

.card h3 { font-size: 15px; margin-bottom: 4px; }

.card .card-sub {
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 8px;
}

.card .card-actions { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 10px; }

.tier { margin-bottom: 34px; }

.gap { height: 26px; }

.tier-note { margin-bottom: 14px; }

.tier-label {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--font-head);
  font-weight: bold;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--on-orange);
  background-color: var(--orange);
  background-image: linear-gradient(to bottom,
    var(--orange-hi40) 0%,
    var(--orange-hi18) 10%,
    var(--orange) 55%,
    var(--orange-lo14) 100%);
  border: 1px solid var(--orange-border);
  border-radius: 3px;
  padding: 4px 12px;
  margin-bottom: 12px;
}

.tier-label.tier-quiet {
  color: var(--chrome-text);
  background-color: var(--graphite);
  background-image: linear-gradient(to bottom,
    var(--graphite-hi40) 0%,
    var(--graphite-hi18) 10%,
    var(--graphite) 55%,
    var(--graphite-lo14) 100%);
  border-color: var(--graphite-border);
}

.aside-block h2 {
  font-size: 13px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.fact-list { list-style: none; padding: 0; font-size: 13px; }
.fact-list li { padding: 6px 0; border-bottom: 1px dotted var(--frame-dark); }
.fact-list li:last-child { border-bottom: none; }
.fact-list .fact-k {
  display: block;
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* ---------- Footer ---------- */

.footer {
  background-color: var(--charcoal);
  background-image: linear-gradient(to bottom,
    var(--charcoal-hi18) 0%,
    var(--charcoal) 30%,
    var(--charcoal-lo14) 100%);
  border-top: 3px solid var(--orange);
  color: var(--chrome-text);
  font-size: 12px;
}

.footer a { color: var(--amber-hi); }
.footer a:hover { color: #ffce8e; }

.footer .footer-legal { color: var(--chrome-text-dim); margin-top: 8px; }

/* ================================================================
   DESKTOP interface (>= 768px): fixed-width shell, masthead with
   horizontal plastic tab bar, multi-column content.
   ================================================================ */

@media (min-width: 768px) {

  .shell { max-width: 984px; margin: 0 auto; padding: 0 22px; }

  .masthead-inner { padding-top: 18px; padding-bottom: 14px; }

  .masthead .tagline { margin-left: auto; text-align: right; }

  /* Tab bar sits in a charcoal strip under the masthead. */
  .navbar {
    background-color: var(--charcoal);
    background-image: linear-gradient(to bottom,
      var(--charcoal-hi18) 0%,
      var(--charcoal) 40%,
      var(--charcoal-lo14) 100%);
    border-bottom: 1px solid var(--charcoal-border);
  }

  .nav-toggle { display: none; }

  .site-nav ul { display: flex; gap: 6px; padding: 6px 22px; }

  .site-nav a {
    display: block;
    font-size: 13px;
    color: var(--ink);
    padding: 6px 18px;
    border-radius: 3px;
    background-color: var(--button);
    background-image: linear-gradient(to bottom,
      var(--button-hi40) 0%,
      var(--button-hi18) 10%,
      var(--button) 55%,
      var(--button-lo14) 100%);
    border: 1px solid var(--button-border);
  }
  .site-nav a:hover { filter: brightness(1.06); color: var(--ink); }

  .site-nav a.current {
    color: var(--on-orange);
    background-color: var(--orange);
    background-image: linear-gradient(to bottom,
      var(--orange-hi40) 0%,
      var(--orange-hi18) 10%,
      var(--orange) 55%,
      var(--orange-lo14) 100%);
    border-color: var(--orange-border);
  }

  .content { padding: 30px 0 44px; }

  /* Two-column: main + aside */
  .columns { display: grid; grid-template-columns: 1fr 280px; gap: 22px; align-items: start; }

  .stack > * + * { margin-top: 22px; }

  .card-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

  .hero { padding: 30px 34px; }

  .article { padding: 30px 34px; max-width: 760px; }

  .footer-inner { padding-top: 20px; padding-bottom: 24px; }
}

/* ================================================================
   MOBILE interface (< 768px): app bar with MENU toggle, stacked
   plastic buttons, single column, larger type and touch targets.
   ================================================================ */

@media (max-width: 767px) {

  body { font-size: 15px; }

  .shell { padding: 0 12px; }

  .masthead { border-bottom-width: 2px; }

  .masthead-inner { padding-top: 10px; padding-bottom: 10px; }

  .brand { gap: 10px; }
  .brand-mark { width: 38px; height: 38px; }
  .brand-name { font-size: 14px; letter-spacing: 0.01em; }

  .masthead .tagline { display: none; }

  /* MENU button (label for the checkbox) */
  .nav-button {
    display: block;
    margin-left: auto;
    font-family: var(--font-head);
    font-weight: bold;
    font-size: 13px;
    letter-spacing: 0.04em;
    color: var(--ink);
    padding: 10px 16px;
    border-radius: 3px;
    background-color: var(--button);
    background-image: linear-gradient(to bottom,
      var(--button-hi40) 0%,
      var(--button-hi18) 10%,
      var(--button) 55%,
      var(--button-lo14) 100%);
    border: 1px solid var(--button-border);
    cursor: pointer;
    user-select: none;
  }

  .nav-toggle:checked ~ .masthead .nav-button {
    background-image: linear-gradient(to bottom,
      var(--button-lo14) 0%,
      var(--button) 45%,
      var(--button-hi18) 100%);
  }

  /* Slide-down menu: hidden until the checkbox is ticked. */
  .navbar { display: none; }

  .nav-toggle:checked ~ .navbar { display: block; }

  .navbar {
    background: var(--charcoal);
    border-bottom: 2px solid var(--orange);
    padding: 10px 12px 14px;
  }

  .site-nav ul { display: flex; flex-direction: column; gap: 8px; padding: 0; }

  .site-nav a {
    display: block;
    font-size: 16px;
    padding: 13px 16px;
    border-radius: 3px;
    color: var(--ink);
    background-color: var(--button);
    background-image: linear-gradient(to bottom,
      var(--button-hi40) 0%,
      var(--button-hi18) 10%,
      var(--button) 55%,
      var(--button-lo14) 100%);
    border: 1px solid var(--button-border);
  }

  .site-nav a.current {
    color: var(--on-orange);
    background-color: var(--orange);
    background-image: linear-gradient(to bottom,
      var(--orange-hi40) 0%,
      var(--orange-hi18) 10%,
      var(--orange) 55%,
      var(--orange-lo14) 100%);
    border-color: var(--orange-border);
  }

  .content { padding: 18px 0 30px; }

  .columns { display: block; }
  .columns > * + * { margin-top: 16px; }

  .stack > * + * { margin-top: 16px; }

  .card-grid { display: block; }
  .card-grid > * + * { margin-top: 14px; }

  .panel { padding: 18px 16px; }

  .hero h1 { font-size: 20px; }
  .article h1 { font-size: 19px; }

  .btn { display: block; padding: 13px 18px; font-size: 15px; }
  .card .card-actions { display: block; }
  .card .card-actions > * + * { margin-top: 10px; }

  .footer-inner { padding-top: 18px; padding-bottom: 22px; }
}