:root {
  --bg: #0b0e13;
  --panel: #131821;
  --panel-2: #1a2130;
  --line: #2a3344;
  --text: #dfe4ec;
  --dim: #8a94a6;
  --accent: #ffb000;
  --ok: #4ade80;
  --bad: #f87171;
  --term-bg: #06080b;
  --c-unix: #c4b5fd;
  --c-apple: #f9a8d4;
  --c-ms: #38bdf8;
  --c-linux: #4ade80;
  --c-net: #2dd4bf;
  --c-fw: #fdba74;
  --c-sec: #fde047;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --radius: 10px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

/* ---------- monitor frame ---------- */
/* A fixed bezel drawn on top of everything; the page scrolls underneath it, so window scrolling,
   scrollIntoView and overlays keep working. Overlays and the blue screen appear "inside" the monitor. */
:root { --bz: 6px; --bz-b: 6px; --plastic: #26241f; --plastic-hi: #3a372f; }
@media (min-width: 900px) { :root { --bz: 22px; --bz-b: 44px; } }
html { scrollbar-color: var(--plastic-hi) var(--plastic); }
body { padding: var(--bz) var(--bz) var(--bz-b); }
.bezel { position: fixed; inset: 0; z-index: 60; pointer-events: none; }
.bezel::before {
  content: '';
  position: absolute;
  inset: var(--bz) var(--bz) var(--bz-b);
  border-radius: 12px;
  box-shadow:
    0 0 0 100vmax var(--plastic),
    0 0 0 2px #000,
    inset 0 0 0 1px rgb(0 0 0 / .8),
    inset 0 0 60px rgb(0 0 0 / .55);
}
.bezel-brand, .bezel-led { display: none; }
@media (min-width: 900px) {
  .bezel-brand {
    display: block;
    position: absolute;
    left: 50%;
    bottom: 12px;
    transform: translateX(-50%);
    font: 600 12px var(--mono);
    letter-spacing: .35em;
    text-transform: uppercase;
    color: #8a8473;
    text-shadow: 0 1px 0 #000;
  }
  .bezel-led {
    display: block;
    position: absolute;
    right: 40px;
    bottom: 17px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 6px #4ade80, 0 0 14px rgb(74 222 128 / .5);
  }
}

/* ---------- CRT look for the retro parts ---------- */
.crt { position: relative; text-shadow: 0 0 4px currentColor; }
.term.crt { text-shadow: 0 0 2px currentColor; }
.crt::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background: repeating-linear-gradient(to bottom, rgb(0 0 0 / .22) 0 1px, transparent 1px 3px);
}
@media (prefers-reduced-motion: no-preference) {
  .crt.flicker { animation: flicker 4s infinite steps(1); }
}
@keyframes flicker { 0%, 100% { opacity: 1; } 47% { opacity: .96; } 48% { opacity: 1; } }

/* ---------- icons ---------- */
.ico-svg { width: 100%; height: 100%; display: block; }
.ico-text { font: 600 .8em var(--mono); white-space: nowrap; }
.item .mi { width: 1.2rem; height: 1.2rem; display: grid; place-items: center; color: var(--accent); }
.item:disabled .mi { color: var(--dim); }
.item:hover:not(:disabled) .mi, .item:focus-visible .mi { color: var(--bg); }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--sans);
  min-height: 100vh;
  min-height: 100dvh;
}
h1, h2 { font-family: var(--mono); font-weight: 600; line-height: 1.25; }
h1 { font-size: clamp(1.5rem, 5vw, 2rem); margin: .5rem 0 1rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 .75rem; }
p { margin: 0 0 1rem; }
a { color: var(--accent); }
code { font-family: var(--mono); font-size: .9em; background: var(--panel-2); padding: .1em .35em; border-radius: 4px; overflow-wrap: anywhere; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }
.dim { color: var(--dim); }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #1a1200;
  border: 0;
  border-radius: 8px;
  padding: .7rem 1.2rem;
  font-family: var(--mono);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.btn.ghost { background: transparent; color: var(--text); box-shadow: inset 0 0 0 1px var(--line); }
.btn.danger { background: var(--bad); color: #2a0606; }
.link { background: none; border: 0; padding: 0; color: var(--dim); text-decoration: underline; cursor: pointer; font-size: .85rem; }

/* ---------- boot screen + menu ---------- */
.boot { width: min(46rem, 100% - 32px); margin: 0 auto; padding: 2rem 0 3rem; }
.post {
  font: 13px/1.5 var(--mono);
  color: var(--accent);
  background: #0a0700;
  border-radius: 8px;
  padding: .8rem 1rem;
  margin: 0 0 1.5rem;
  white-space: pre-wrap;
  min-height: 1.5em;
}
.grub-head { font-size: 1rem; margin: 0 0 .5rem; color: var(--text); }
.grub-head span { color: var(--dim); font-weight: 400; margin-left: .5rem; }
.grub-box {
  list-style: none;
  margin: 0;
  padding: .4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.grub-box .sep { height: 1px; background: var(--line); margin: .4rem .5rem; }
.grub-box .chapter { font: 600 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); padding: .9rem .7rem .3rem; }
.grub-box .chapter:first-child { padding-top: .4rem; }
.item {
  width: 100%;
  display: grid;
  grid-template-columns: 1.4rem 1.3rem 1fr auto;
  align-items: center;
  gap: .6rem;
  text-align: left;
  background: none;
  border: 0;
  border-radius: 6px;
  padding: .75rem .7rem;
  font-family: var(--mono);
  font-size: .95rem;
  cursor: pointer;
}
.item .no { color: var(--accent); }
.item:hover:not(:disabled), .item:focus-visible { background: var(--text); color: var(--bg); outline: none; }
.item:hover:not(:disabled) .no, .item:focus-visible .no { color: var(--bg); }
.item:disabled { cursor: default; color: var(--dim); }
.item:disabled .no { color: var(--dim); }
.st { font-size: .75rem; color: var(--dim); white-space: nowrap; }
.st.new { color: var(--accent); }
.st.done { color: var(--ok); }
.item:hover:not(:disabled) .st, .item:focus-visible .st { color: inherit; }
.grub-help { font: 13px var(--mono); color: var(--dim); margin: .8rem 0 2rem; }
.grub-about { color: var(--dim); max-width: 34rem; }
@media (hover: none) { .kbd-only { display: none; } }

/* ---------- mission pages ---------- */
.mission { width: min(44rem, 100% - 32px); margin: 0 auto; padding: 1.25rem 0 4rem; }
.m-head { display: flex; justify-content: space-between; align-items: center; font: 13px var(--mono); }
.back { color: var(--dim); text-decoration: none; padding: .4rem 0; }
.back:hover { color: var(--accent); }
.m-no { color: var(--accent); letter-spacing: .08em; }
.lead, .prose p { color: var(--text); }
.kicker { font: 600 12px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin-bottom: .5rem; }

.goals { list-style: none; padding: 0; margin: 1.5rem 0; display: grid; gap: .4rem; }
.goals li {
  position: relative;
  padding: .55rem .8rem .55rem 2.3rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: .95rem;
}
.goals li::before {
  content: '';
  position: absolute;
  left: .8rem;
  top: .85rem;
  width: .8rem;
  height: .8rem;
  border: 2px solid var(--dim);
  border-radius: 3px;
}
.goals li.ok { border-color: color-mix(in srgb, var(--ok) 50%, var(--line)); color: var(--dim); }
.goals li.ok::before { border-color: var(--ok); background: var(--ok); }
.goals li.current { border-color: var(--accent); }
.goals li.current::before { border-color: var(--accent); top: 2.05rem; }
.goals li .kicker { display: block; margin-bottom: .15rem; }
.goals li .clue { display: block; margin-top: .4rem; font-size: .88rem; color: var(--dim); }

.box { margin-top: 2rem; padding: 1.25rem; border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: var(--radius); background: var(--panel); }
.box h2 { margin-top: 0; }
.analogy { background: var(--panel-2); padding: .8rem 1rem; border-radius: 8px; }

/* ---------- mission 1: layers quiz ---------- */
.quiz { display: grid; gap: 1.5rem; margin-top: 1.5rem; }
@media (min-width: 760px) {
  .mission:has(.quiz) { width: min(60rem, 100% - 32px); }
  .mission:has(.quiz) .prose { max-width: 44rem; }
  .quiz { grid-template-columns: 15rem 1fr; align-items: start; }
  .stack { position: sticky; top: 1rem; }
}
.stack { list-style: none; margin: 0; padding: 0; display: grid; gap: .35rem; }
@media (max-width: 759px) {
  /* Compact 2x2 so the highlighted layer stays near the question */
  .stack { grid-template-columns: 1fr 1fr; }
  .stack li { padding: .5rem .6rem; }
  .stack li span { display: none; }
}
.stack li {
  padding: .6rem .8rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  transition: background .2s, border-color .2s, color .2s;
}
.stack li strong { display: block; font: 600 .9rem var(--mono); }
.stack li span { font-size: .8rem; color: var(--dim); }
.stack li.hit { background: var(--accent); border-color: var(--accent); color: #1a1200; }
.stack li.hit span { color: #3d2c00; }
.q-panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; }
.q-panel h2 { margin-top: 0; }
.q { font-size: 1.1rem; font-weight: 600; }
.choices { display: grid; gap: .5rem; margin-bottom: 1rem; }
@media (min-width: 520px) { .choices { grid-template-columns: repeat(3, 1fr); } }
.choice {
  padding: .75rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  cursor: pointer;
  font-family: var(--mono);
  font-size: .9rem;
}
.choice:hover:not(:disabled) { border-color: var(--accent); }
.choice:disabled { cursor: default; opacity: .55; }
.choice.right { opacity: 1; border-color: var(--ok); background: color-mix(in srgb, var(--ok) 18%, var(--panel-2)); }
.choice.wrong { opacity: 1; border-color: var(--bad); background: color-mix(in srgb, var(--bad) 18%, var(--panel-2)); }
.verdict { font: 600 1rem var(--mono); margin-bottom: .4rem; }
.verdict.ok { color: var(--ok); }
.verdict.no { color: var(--bad); }

/* ---------- mission 3: explorer ---------- */
.explorer { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); overflow: hidden; }
.ex-bar { display: flex; align-items: center; gap: .5rem; padding: .5rem; border-bottom: 1px solid var(--line); background: var(--panel-2); }
.ex-up {
  flex: none;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--panel);
  cursor: pointer;
}
.ex-up:disabled { opacity: .35; cursor: default; }
.ex-path { font: 14px var(--mono); overflow-wrap: anywhere; }
.ex-list { list-style: none; margin: 0; padding: .3rem; max-height: 22rem; overflow-y: auto; }
.ex-list button {
  width: 100%;
  display: flex;
  align-items: center;
  gap: .6rem;
  text-align: left;
  padding: .55rem .6rem;
  border: 0;
  border-radius: 6px;
  background: none;
  cursor: pointer;
  font: 15px var(--mono);
}
.ex-list button:hover, .ex-list button.sel { background: var(--panel-2); }
.ex-list button.sel { box-shadow: inset 0 0 0 1px var(--accent); }
.ex-list .empty { padding: .6rem; color: var(--dim); font: 14px var(--mono); }
.ico { flex: none; width: 1.1rem; height: .85rem; border-radius: 2px; }
.is-dir .ico { background: #e8b94a; border-top-left-radius: 0; box-shadow: -.2rem -.15rem 0 -.05rem #e8b94a; margin-left: .2rem; }
.is-file .ico { width: .8rem; height: 1rem; background: var(--dim); clip-path: polygon(0 0, 70% 0, 100% 30%, 100% 100%, 0 100%); margin: 0 .15rem; }
.ex-info { border-top: 1px solid var(--line); padding: .9rem 1rem; min-height: 6rem; font-size: .95rem; }
.ex-info p { margin-bottom: .4rem; }
.ex-info strong { font-family: var(--mono); }

.lanes { display: grid; gap: 1rem; margin: 1rem 0 1.5rem; }
.lane-title { font: 600 13px var(--mono); color: var(--dim); margin: 0 0 .4rem; }
.lane {
  list-style: none;
  margin: 0;
  padding: 0 0 .4rem;
  display: flex;
  gap: .4rem;
  overflow-x: auto;
  scrollbar-width: thin;
}
.lane li {
  flex: none;
  padding: .45rem .7rem;
  border-radius: 6px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--c-ms);
  font-size: .85rem;
}
.lane li strong { display: block; font-family: var(--mono); font-weight: 600; white-space: nowrap; }
.lane li span { color: var(--dim); }
.lane.dos li { border-top-color: var(--dim); }
.lane li.lane-end { align-self: center; border: 0; background: none; color: var(--dim); font: 12px var(--mono); }
.lane.dos .lane-end { color: var(--bad); }
.lane.nt .lane-end { color: var(--ok); }

.bsod {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: #0078d7;
  color: #fff;
  font-family: 'Segoe UI', var(--sans);
  display: flex;
  align-items: center;
  cursor: pointer;
}
.bsod-in { width: min(40rem, 100% - 48px); margin: 0 auto; font-size: clamp(1rem, 3.5vw, 1.4rem); }
.bsod .face { font-size: clamp(4rem, 18vw, 8rem); line-height: 1; margin-bottom: 1.5rem; }
.bsod .code { font-size: .8em; margin-top: 2rem; }
.bsod .tap { font-size: .8em; opacity: .85; margin-top: 2rem; }

/* ---------- mission 5: terminal ---------- */
.term {
  background: var(--term-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .8rem;
  font: 14px/1.5 var(--mono);
  cursor: text;
}
@media (min-width: 600px) { .term { font-size: 15px; } }
.term-out { max-height: 55vh; min-height: 12rem; overflow-y: auto; overflow-wrap: anywhere; }
.ln { white-space: pre-wrap; }
.ln.err { color: var(--bad); }
.ln.dim { color: var(--dim); }
.p-user { color: var(--ok); font-weight: 600; }
.p-path { color: #60a5fa; font-weight: 600; }
.f-dir { color: #60a5fa; font-weight: 600; }
.tux { color: var(--accent); }
.term-line { display: flex; gap: .5rem; align-items: baseline; }
.prompt { flex: none; }
.term-in {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  color: var(--text);
  font: inherit;
  font-size: max(16px, 1em); /* 16px keeps iOS from zooming in */
  caret-color: var(--accent);
  padding: 0;
  outline: none;
}
.chips { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .75rem; }
.chip {
  font: 14px var(--mono);
  padding: .5rem .8rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  cursor: pointer;
}
.chip:first-child { border-color: var(--accent); color: var(--accent); }
.chip:hover { background: var(--panel-2); }

/* ---------- mission 6: domains ---------- */
.step { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--line); }
.step:first-child { border-top: 0; padding-top: 0; }
.step h2 { margin-top: .2rem; }
.step-next { margin-top: 1.25rem; }
.explain { margin-top: 1rem; }
.clue { color: var(--dim); font-size: .95rem; border-left: 3px solid var(--accent); padding-left: .8rem; }

.url-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  padding: .5rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  font: 15px var(--mono);
}
.url-part {
  border: 0;
  border-radius: 999px;
  padding: .45rem .55rem;
  background: none;
  cursor: pointer;
  font: inherit;
  overflow-wrap: anywhere;
}
.url-part:hover { background: var(--panel-2); }
.url-part.seen { color: var(--accent); }
.url-part.sel { background: var(--accent); color: #1a1200; }

.labels { display: flex; flex-wrap: wrap; align-items: flex-start; gap: .25rem; margin: 1rem 0; }
.labels .dot { font: 600 1.4rem var(--mono); color: var(--dim); padding-top: .55rem; }
.label {
  display: grid;
  justify-items: center;
  gap: .2rem;
  min-width: 3.8rem;
  padding: .55rem .5rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  cursor: pointer;
}
.l-text { font: 600 1.1rem var(--mono); }
.l-ord { font: 600 12px var(--mono); color: var(--ok); min-height: 1em; }
.l-lvl { font-size: .72rem; color: var(--dim); max-width: 5.2rem; text-align: center; line-height: 1.2; }
.label.ok { border-color: var(--ok); cursor: default; }
.label.nope { animation: shake .3s; border-color: var(--bad); }
@keyframes shake { 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }

.cast { margin: 1rem 0; display: grid; gap: .5rem; }
.cast dt { font: 600 .95rem var(--mono); color: var(--accent); }
.cast dd { margin: 0 0 .4rem; color: var(--text); font-size: .95rem; }
@media (min-width: 640px) {
  .cast { grid-template-columns: 9rem 1fr; column-gap: 1rem; }
  .cast dd { margin: 0; }
}
.who-quiz, .valid-quiz, .resolver { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem; }
@media (min-width: 520px) {
  .choices.wide { grid-template-columns: repeat(auto-fill, minmax(9rem, 1fr)); }
  .choices.two { grid-template-columns: 1fr 1fr; }
}
.domain-q { font: 600 1.4rem var(--mono); overflow-wrap: anywhere; }

.r-log { display: grid; gap: .5rem; margin-bottom: 1rem; }
.r-msg { margin: 0; padding: .55rem .8rem; border-radius: 8px; background: var(--panel-2); font-size: .95rem; max-width: 92%; }
.r-msg.me { justify-self: end; background: color-mix(in srgb, var(--accent) 22%, var(--panel-2)); }
.r-msg.hint { color: var(--bad); background: color-mix(in srgb, var(--bad) 12%, var(--panel-2)); }

.lookup { display: flex; gap: .5rem; margin-top: .5rem; }
.lookup-in {
  flex: 1;
  min-width: 0;
  padding: .65rem .8rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--term-bg);
  color: var(--text);
  font: 16px var(--mono);
}
.lookup-in:focus { outline: none; border-color: var(--accent); }
.lookup-out { margin-top: 1rem; }
.ips { list-style: none; padding: 0; margin: 0 0 1rem; display: flex; flex-wrap: wrap; gap: .4rem; }
.ips li { font: 600 15px var(--mono); color: var(--ok); background: var(--term-bg); border: 1px solid var(--line); padding: .3rem .6rem; border-radius: 6px; }
.rules { margin: 0 0 1rem; padding-left: 1.2rem; }

/* ---------- mission 2: boot ---------- */
.quiz-box { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem; margin-top: 1rem; }
.pc { display: grid; gap: .8rem; margin: 1rem 0; }
@media (min-width: 760px) { .pc { grid-template-columns: 1fr 11rem; align-items: start; } }
.pc-screen {
  aspect-ratio: 4 / 3;
  max-height: 22rem;
  width: 100%;
  background: #050505;
  color: #c8c8c8;
  border-radius: 14px;
  border: 10px solid #1d1c19;
  box-shadow: inset 0 0 40px rgb(0 0 0 / .9), 0 0 0 1px #000;
  overflow: hidden;
  font: 12px/1.45 var(--mono);
  padding: .8rem;
}
@media (min-width: 600px) { .pc-screen { font-size: 13px; } }
.pc-off { height: 100%; display: grid; place-items: center; color: #444; text-shadow: none; }
.pc-text { margin: 0; white-space: pre; font: inherit; overflow: hidden; }
.pc-text .hl { background: #c8c8c8; color: #050505; text-shadow: none; }
.okk { color: #4ade80; }
.dots::after { content: ''; animation: dots 1.2s steps(4) infinite; }
@keyframes dots { 0% { content: ''; } 25% { content: '.'; } 50% { content: '..'; } 75% { content: '...'; } }
.pc-center { height: 100%; display: grid; place-content: center; justify-items: center; gap: .6rem; text-align: center; }
.pc-center p { margin: 0; }
.spinner { width: 2.4rem; height: 2.4rem; border-radius: 50%; border: 3px solid #333; border-top-color: #60a5fa; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.st-kernel, .st-login { color: #e5e7eb; background: radial-gradient(circle at 50% 40%, #12305a, #050a14 70%); }
.pc-user { width: 3rem; height: 3rem; color: #e5e7eb; }
.pc-pass { letter-spacing: .2em; padding: .3rem .8rem; border: 1px solid #555; border-radius: 4px; }
.st-desk { padding: 0; background: linear-gradient(160deg, #1e3a8a, #0f766e); color: #fff; }
.pc-desk { height: 100%; display: grid; grid-template-rows: 1fr auto; }
.pc-icons { display: grid; align-content: start; gap: .7rem; padding: .8rem; }
.pc-icons span { display: grid; grid-template-columns: 1.6rem auto; align-items: center; gap: .5rem; }
.pc-icons i { font-style: normal; font-family: var(--sans); }
.pc-bar { display: flex; justify-content: space-between; align-items: center; padding: .3rem .6rem; background: rgb(0 0 0 / .45); }
.pc-start { width: 1.2rem; height: 1.2rem; color: #60a5fa; }
.stages { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: .35rem; }
@media (min-width: 760px) { .stages { flex-direction: column; } }
.stages li { padding: .4rem .65rem; border-radius: 6px; border: 1px solid var(--line); background: var(--panel); font: 13px var(--mono); color: var(--dim); }
.stages li.done { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 45%, var(--line)); }
.stages li.now { color: #1a1200; background: var(--accent); border-color: var(--accent); }
.power-btn { display: inline-flex; align-items: center; gap: .5rem; }
.btn-ico { width: 1.1rem; height: 1.1rem; display: inline-block; }

.order-wrap { display: grid; gap: .45rem; margin: 1rem 0; }
@media (min-width: 560px) { .order-wrap { grid-template-columns: 1fr 1fr; } }
.order-btn {
  display: flex;
  align-items: center;
  gap: .6rem;
  text-align: left;
  padding: .7rem .8rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  cursor: pointer;
  font: 15px var(--mono);
}
.o-num { width: 1.6rem; height: 1.6rem; flex: none; display: grid; place-items: center; border-radius: 50%; border: 1px dashed var(--dim); font-weight: 600; }
.order-btn.ok { border-color: var(--ok); cursor: default; }
.order-btn.ok .o-num { border: 0; background: var(--ok); color: #052e16; }
.order-btn.nope { animation: shake .3s; border-color: var(--bad); }

/* Classic VGA blue firmware setup */
.bios {
  --vga-blue: #0000aa;
  --vga-gray: #aaaaaa;
  --vga-white: #ffffff;
  --vga-yellow: #ffff55;
  --vga-cyan: #55ffff;
  background: var(--vga-blue);
  color: var(--vga-gray);
  font: 14px/1.5 var(--mono);
  border-radius: 6px;
  overflow: hidden;
  margin: 1rem 0;
  outline-offset: 3px;
}
.bios.crt { text-shadow: 0 0 2px currentColor; }
.bios-title { text-align: center; background: var(--vga-cyan); color: var(--vga-blue); font-weight: 600; padding: .25rem; text-shadow: none; }
.bios-tabs { display: flex; background: var(--vga-gray); }
.bios-tab { flex: 1; border: 0; background: none; color: var(--vga-blue); font: 600 14px var(--mono); padding: .45rem .2rem; cursor: pointer; text-shadow: none; }
.bios-tab.on { background: var(--vga-blue); color: var(--vga-white); }
.bios-body { padding: .9rem 1rem; min-height: 11rem; border: 2px solid var(--vga-gray); border-top: 0; border-bottom: 0; margin: 0 .4rem; }
.bios-h { color: var(--vga-cyan); margin-bottom: .5rem; }
.bios-info { display: grid; grid-template-columns: auto 1fr; gap: .2rem 1.2rem; margin: 0 0 1rem; }
.bios-info dt { color: var(--vga-gray); }
.bios-info dd { margin: 0; color: var(--vga-white); }
.bios-list { list-style: none; margin: 0 0 1rem; padding: 0; display: grid; gap: .2rem; }
.bios-opt {
  width: 100%;
  text-align: left;
  border: 0;
  background: none;
  color: var(--vga-white);
  font: inherit;
  padding: .35rem .5rem;
  cursor: pointer;
}
.bios-opt.sel, .bios-opt:hover { background: var(--vga-gray); color: var(--vga-blue); text-shadow: none; }
.bios-help { color: var(--vga-yellow); font-size: 13px; margin: 0; }
.bios-exit { display: grid; gap: .4rem; }
.bios-keys { display: flex; flex-wrap: wrap; gap: .4rem; padding: .5rem; background: var(--vga-gray); }
.bios-key { flex: 1 1 auto; border: 1px solid var(--vga-blue); background: var(--vga-gray); color: var(--vga-blue); font: 600 13px var(--mono); padding: .45rem .5rem; cursor: pointer; text-shadow: none; }
.bios-key:hover:not(:disabled) { background: var(--vga-white); }
.bios-key:disabled { opacity: .45; cursor: default; }
.boot-out { margin: 0; padding: 1rem; min-height: 14rem; background: #050505; color: #c8c8c8; white-space: pre-wrap; }

.err-screen {
  margin: 0 0 1rem;
  padding: 1rem;
  min-height: 8rem;
  border-radius: 8px;
  background: #050505;
  color: #c8c8c8;
  font: 13px/1.5 var(--mono);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.err-screen.blue { background: #0078d7; color: #fff; font-family: 'Segoe UI', var(--sans); }
.err-screen.login { background: radial-gradient(circle at 50% 30%, #12305a, #050a14 75%); color: #e5e7eb; text-align: center; font-family: var(--sans); }

/* ---------- mission 4: accounts ---------- */
.accounts { display: flex; gap: .8rem; margin: 1rem 0; flex-wrap: wrap; }
.acc { flex: 1 1 9rem; display: grid; justify-items: center; gap: .2rem; padding: 1rem .8rem; border-radius: var(--radius); border: 1px solid var(--line); background: var(--panel); text-align: center; }
.acc strong { font-family: var(--mono); }
.acc span:last-child { font-size: .85rem; color: var(--dim); }
.acc-ico { width: 2.6rem; height: 2.6rem; color: var(--c-ms); }
.acc.admin .acc-ico { color: var(--c-sec); }

.uac { border-radius: 8px; overflow: hidden; border: 1px solid #3b4a63; background: #1f2a3c; font-family: 'Segoe UI', var(--sans); font-weight: 400; font-size: .95rem; margin-bottom: .5rem; }
.uac-head { display: flex; align-items: center; gap: .5rem; padding: .5rem .8rem; font-size: .85rem; color: #fff; background: #1d4ed8; }
.uac.warn .uac-head { background: #a16207; }
.uac-ico { width: 1.1rem; height: 1.1rem; color: #fde047; }
.uac.warn .uac-ico { color: #fff; }
.uac-body { padding: .8rem 1rem; }
.uac-body p { margin: 0 0 .4rem; }
.uac-q { font-size: 1.05rem; font-weight: 600; }
.uac-app { font: 600 1.05rem var(--mono); color: #fff; overflow-wrap: anywhere; }

.pw-in, .hash-in {
  width: 100%;
  padding: .7rem .9rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--term-bg);
  color: var(--text);
  font: 16px var(--mono);
}
.pw-in:focus, .hash-in:focus { outline: none; border-color: var(--accent); }
.meter { height: .55rem; border-radius: 99px; background: var(--panel-2); margin: .7rem 0 .5rem; overflow: hidden; }
.meter span { display: block; height: 100%; width: 0; background: var(--bad); transition: width .2s, background .2s; }
.meter span[data-level="mid"] { background: var(--accent); }
.meter span[data-level="good"] { background: var(--ok); }
.pw-out { min-height: 1.6em; }
.hash-demo { margin-top: 1.5rem; }
code.hash { display: block; padding: .6rem .8rem; word-break: break-all; color: var(--ok); background: var(--term-bg); }

/* ---------- mission 7: email ---------- */
.route { list-style: none; margin: 1rem 0; padding: 0; display: flex; flex-wrap: wrap; gap: .3rem; align-items: center; }
.route li[data-n] { display: flex; align-items: center; gap: .4rem; padding: .45rem .6rem; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); font: 13px var(--mono); color: var(--dim); }
.route .r-arrow { color: var(--dim); }
.r-ico { width: 1.1rem; height: 1.1rem; }
.route li.done { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 45%, var(--line)); }
.route li.now { color: #1a1200; background: var(--accent); border-color: var(--accent); }
.mx-live { margin-top: 1.5rem; }
.prio { font-weight: 400; color: var(--dim); font-size: .8em; margin-left: .3rem; }

.mail { font-weight: 400; font-size: .95rem; border: 1px solid var(--line); border-radius: 10px; background: #f8fafc; color: #0f172a; padding: .9rem 1rem; margin-bottom: .5rem; }
.mail-from { display: flex; gap: .7rem; align-items: center; margin-bottom: .6rem; }
.mail-from div { display: grid; min-width: 0; }
.mail-ava { flex: none; width: 2.2rem; height: 2.2rem; border-radius: 50%; display: grid; place-items: center; background: #6366f1; color: #fff; font-weight: 600; }
.mail-addr { font: 13px var(--mono); color: #475569; overflow-wrap: anywhere; }
.mail-subj { font-weight: 600; margin: 0 0 .3rem; }
.mail-body { margin: 0; color: #334155; }
.mail-body u { color: #2563eb; }

/* ---------- cards ---------- */
.card {
  position: relative;
  flex: none;
  width: 8.5rem;
  min-height: 10.5rem;
  display: flex;
  flex-direction: column;
  text-align: left;
  padding: .8rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  border-top: 4px solid var(--branch);
  background: linear-gradient(170deg, color-mix(in srgb, var(--branch) 14%, var(--panel)), var(--panel) 60%);
  cursor: pointer;
}
button.card:hover { transform: translateY(-2px); border-color: var(--branch); }
.card { transition: transform .15s, border-color .15s; }
.c-ico { position: absolute; top: .7rem; right: .7rem; width: 1.6rem; height: 1.6rem; display: grid; place-items: center; color: var(--branch); opacity: .9; font: 600 1rem var(--mono); }
.c-ico.big { position: static; width: 3rem; height: 3rem; margin-bottom: .6rem; font-size: 1.3rem; }
.card.locked .c-ico { color: var(--dim); }
.c-branch { font: 600 11px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--branch); }
.c-year { font: 600 1.6rem var(--mono); margin: .3rem 0 .2rem; }
.c-name { font: 600 1rem var(--mono); line-height: 1.2; }
.c-maker { font-size: .78rem; color: var(--dim); margin-top: auto; padding-top: .5rem; }
.card.locked { cursor: default; background: var(--panel); border-top-color: var(--line); opacity: .6; }
.card.locked .c-branch { color: var(--dim); }
.card.locked .c-name { color: var(--dim); }

.lineage { margin-top: 1.75rem; }
.lineage h2 { color: var(--branch); margin: 0 0 .6rem; font-size: 1rem; }
.lineage-row { display: flex; align-items: center; gap: .4rem; overflow-x: auto; padding: .2rem .1rem .6rem; scrollbar-width: thin; }
.lineage .arrow { flex: none; color: var(--dim); }
.lineage .dim { font-size: .9rem; margin-top: .2rem; }

/* ---------- overlays ---------- */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgb(0 0 0 / .65);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(16px + var(--bz)) calc(16px + var(--bz)) calc(16px + var(--bz-b));
  animation: fade .15s ease-out;
}
.sheet {
  width: min(32rem, 100%);
  max-height: calc(100dvh - 32px - var(--bz) - var(--bz-b));
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.5rem;
}
.sheet h2 { margin-top: 0; }
.card-detail { border-left: 3px solid var(--branch); padding-left: 1rem; }
.card-detail .c-branch { margin-bottom: .2rem; }
.card-detail h2 { font-size: 1.6rem; margin-bottom: .1rem; }
.card-detail .c-maker { font-size: .9rem; margin-bottom: 1rem; padding: 0; }
.c-fact { background: var(--panel-2); padding: .8rem 1rem; border-radius: 8px; }
.reward .card-row { display: flex; gap: .6rem; overflow-x: auto; padding: .3rem .1rem .8rem; }
.actions { display: flex; gap: .6rem; flex-wrap: wrap; margin-top: 1rem; }

@keyframes fade { from { opacity: 0; } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}