/* ============================================================
   uP Midterm — Z80 Microprocessor Exam Prep
   ============================================================ */

:root {
  --bg:        #0b1020;
  --bg-2:      #111a33;
  --panel:     #141d38;
  --panel-2:   #1a2547;
  --line:      #27345c;
  --line-soft: #1e2a4d;
  --txt:       #e6ecff;
  --txt-dim:   #a3b0d4;
  --txt-mute:  #7381ab;

  --accent:    #55d6ff;
  --accent-2:  #7c9cff;
  --rom:       #5aa9ff;
  --ram:       #4ade80;
  --io:        #fbbf24;
  --danger:    #fb7185;
  --ok:        #34d399;
  --warn:      #f59e0b;
  --purple:    #c084fc;

  --radius: 14px;
  --radius-sm: 9px;
  --mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'IBM Plex Sans Thai', 'Noto Sans Thai', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --shadow: 0 18px 40px -22px rgba(0,0,0,.9);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 78px; }

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--txt);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(1100px 500px at 12% -8%, rgba(85,214,255,.09), transparent 60%),
    radial-gradient(900px 480px at 92% 4%, rgba(124,156,255,.10), transparent 60%);
  background-attachment: fixed;
}

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11,16,32,.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft);
}
.nav-in {
  max-width: 1180px; margin: 0 auto; padding: 10px 20px;
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
}
.brand {
  font-family: var(--mono); font-weight: 700; font-size: 15px;
  color: var(--txt); text-decoration: none; letter-spacing: .4px;
  display: flex; align-items: center; gap: 9px; white-space: nowrap;
}
.brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.nav-links { display: flex; gap: 3px; flex-wrap: wrap; margin-left: auto; }
.nav-links a {
  color: var(--txt-dim); text-decoration: none; font-size: 13.5px;
  padding: 5px 11px; border-radius: 8px; transition: .16s; white-space: nowrap;
}
.nav-links a:hover { color: var(--txt); background: var(--panel-2); }
.nav-links a.on { color: var(--bg); background: var(--accent); font-weight: 600; }

/* ---------- layout ---------- */
.wrap { max-width: 1180px; margin: 0 auto; padding: 34px 20px 100px; }
.narrow { max-width: 900px; }

h1 { font-size: clamp(27px, 4.4vw, 40px); line-height: 1.28; margin: 0 0 12px; letter-spacing: -.4px; }
h2 {
  font-size: clamp(21px, 3vw, 27px); margin: 52px 0 16px; line-height: 1.4;
  padding-bottom: 10px; border-bottom: 1px solid var(--line-soft);
}
h3 { font-size: 18.5px; margin: 30px 0 10px; color: var(--accent); line-height: 1.5; }
h4 { font-size: 15.5px; margin: 20px 0 8px; color: var(--txt); }
p  { margin: 0 0 14px; color: var(--txt-dim); }
a  { color: var(--accent); }
ul, ol { color: var(--txt-dim); padding-left: 22px; margin: 0 0 14px; }
li { margin: 5px 0; }
strong { color: var(--txt); font-weight: 600; }

.lead { font-size: 17px; color: var(--txt-dim); max-width: 74ch; }

/* ---------- cards / panels ---------- */
.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px; margin: 18px 0;
  box-shadow: var(--shadow);
}
.card.tight { padding: 16px; }
.grid { display: grid; gap: 16px; }
.grid > * { min-width: 0; }
.g2 { grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); }
.g3 { grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); }

.pill {
  display: inline-block; font-family: var(--mono); font-size: 11.5px;
  padding: 3px 10px; border-radius: 99px; letter-spacing: .5px;
  border: 1px solid var(--line); color: var(--txt-dim); background: var(--bg-2);
}
.pill.rom { color: var(--rom); border-color: rgba(90,169,255,.45); background: rgba(90,169,255,.11); }
.pill.ram { color: var(--ram); border-color: rgba(74,222,128,.45); background: rgba(74,222,128,.11); }
.pill.io  { color: var(--io);  border-color: rgba(251,191,36,.45); background: rgba(251,191,36,.11); }
.pill.err { color: var(--danger); border-color: rgba(251,113,133,.45); background: rgba(251,113,133,.11); }
.pill.ok  { color: var(--ok);  border-color: rgba(52,211,153,.45); background: rgba(52,211,153,.11); }

/* ---------- callouts ---------- */
.box { border-left: 3px solid var(--accent); background: var(--bg-2);
  padding: 14px 18px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 18px 0; }
.box p:last-child { margin-bottom: 0; }
.box .t { font-weight: 700; color: var(--txt); display:block; margin-bottom: 5px; font-size: 14.5px; }
.box.warn   { border-color: var(--warn); }
.box.err    { border-color: var(--danger); background: rgba(251,113,133,.07); }
.box.ok     { border-color: var(--ok); background: rgba(52,211,153,.07); }
.box.purple { border-color: var(--purple); background: rgba(192,132,252,.07); }

/* ---------- code ---------- */
code { font-family: var(--mono); font-size: .9em; background: var(--bg-2);
  padding: 1.5px 6px; border-radius: 5px; color: var(--accent); border: 1px solid var(--line-soft); }
pre { background: #080d1c; border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 16px 18px; overflow-x: auto; margin: 14px 0; line-height: 1.62; }
pre code { background: none; border: none; padding: 0; color: #cfe0ff; font-size: 13.2px; }
.k  { color: #7dd3fc; font-weight: 600; }  /* mnemonic */
.n  { color: #fbbf24; }                    /* number   */
.c  { color: #64748b; font-style: italic; }/* comment  */
.r  { color: #f0abfc; }                    /* register */
.lbl{ color: #4ade80; }                    /* label    */

/* ---------- tables ---------- */
.tbl-wrap { overflow-x: auto; margin: 16px 0; border: 1px solid var(--line); border-radius: var(--radius-sm); min-width: 0; }
table { border-collapse: collapse; width: 100%; font-size: 13.6px; min-width: 480px; }
th, td { padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--line-soft); }
th { background: var(--panel-2); color: var(--txt); font-weight: 600; font-size: 12.6px;
  letter-spacing: .3px; position: sticky; top: 0; }
td { color: var(--txt-dim); }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: rgba(124,156,255,.055); }
table.mono td, table.mono th { font-family: var(--mono); font-size: 12.8px; }
td.hi, th.hi { color: var(--accent); }

/* overline for active-low signals */
.ovl { text-decoration: overline; font-family: var(--mono); white-space: nowrap; }

/* ---------- buttons / inputs ---------- */
button, .btn {
  font-family: var(--sans); font-size: 13.5px; font-weight: 600;
  background: var(--panel-2); color: var(--txt); border: 1px solid var(--line);
  padding: 8px 15px; border-radius: 9px; cursor: pointer; transition: .15s;
  display: inline-flex; align-items: center; gap: 7px; text-decoration: none;
}
button:hover, .btn:hover { background: var(--line); border-color: var(--accent); }
button.primary { background: var(--accent); color: #071022; border-color: var(--accent); }
button.primary:hover { filter: brightness(1.12); }
button:disabled { opacity: .4; cursor: not-allowed; }
button.on { background: var(--accent); color: #071022; border-color: var(--accent); }

input[type=text], input[type=number], select, textarea {
  font-family: var(--mono); font-size: 13.5px;
  background: #080d1c; color: var(--txt); border: 1px solid var(--line);
  padding: 8px 11px; border-radius: 8px; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(85,214,255,.14); }
label { font-size: 13px; color: var(--txt-dim); display: block; margin-bottom: 5px; }
.ctrl-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 14px; }
.ctrl-row > div { display: flex; flex-direction: column; }

/* ---------- home hero + question cards ---------- */
.hero { padding: 26px 0 8px; }
.hero .eyebrow { font-family: var(--mono); font-size: 12.5px; color: var(--accent);
  letter-spacing: 2px; text-transform: uppercase; margin-bottom: 12px; }

.qcard {
  display: block; text-decoration: none; color: inherit;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; transition: .18s; position: relative; overflow: hidden;
}
.qcard::before {
  content: ''; position: absolute; inset: 0 auto 0 0; width: 3px;
  background: var(--accent); opacity: .65; transition: .18s;
}
.qcard:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: 0 22px 44px -24px rgba(85,214,255,.5); }
.qcard:hover::before { width: 5px; opacity: 1; }
.qcard .num { font-family: var(--mono); font-size: 12px; color: var(--accent); letter-spacing: 1.4px; }
.qcard .ttl { font-size: 17.5px; font-weight: 700; margin: 6px 0 8px; color: var(--txt); line-height: 1.45; }
.qcard .dsc { font-size: 13.6px; color: var(--txt-dim); margin: 0 0 12px; line-height: 1.65; }
.qcard .score { font-family: var(--mono); font-size: 12px; color: var(--io); }

/* ---------- exam quote ---------- */
.quote {
  background: linear-gradient(180deg, rgba(251,191,36,.09), rgba(251,191,36,.03));
  border: 1px solid rgba(251,191,36,.3); border-radius: var(--radius);
  padding: 20px 24px; margin: 20px 0;
}
.quote .who { font-size: 12.5px; color: var(--io); font-family: var(--mono); margin-bottom: 10px; letter-spacing: .5px; }
.quote ol { color: var(--txt); padding-left: 20px; margin: 0; }
.quote li { margin: 9px 0; font-size: 14.5px; }

/* ---------- steps ---------- */
.steps { counter-reset: s; list-style: none; padding: 0; margin: 18px 0; }
.steps > li {
  counter-increment: s; position: relative; padding-left: 46px; margin-bottom: 20px;
}
.steps > li::before {
  content: counter(s); position: absolute; left: 0; top: 1px;
  width: 30px; height: 30px; border-radius: 9px; background: var(--panel-2);
  border: 1px solid var(--line); color: var(--accent);
  display: grid; place-items: center; font-family: var(--mono); font-size: 13.5px; font-weight: 700;
}
.steps > li > .st { display: block; font-weight: 700; color: var(--txt); margin-bottom: 3px; }

/* ---------- solution toggle ---------- */
.sol { border: 1px solid var(--line); border-radius: var(--radius); margin: 16px 0; overflow: hidden; background: var(--panel); }
.sol > summary {
  cursor: pointer; padding: 13px 18px; font-weight: 600; color: var(--ok);
  list-style: none; background: rgba(52,211,153,.06); user-select: none; font-size: 14.5px;
  display: flex; align-items: center; gap: 9px;
}
.sol > summary::-webkit-details-marker { display: none; }
.sol > summary::before { content: '▶'; font-size: 10px; transition: .2s; color: var(--ok); }
.sol[open] > summary::before { transform: rotate(90deg); }
.sol > summary:hover { background: rgba(52,211,153,.12); }
.sol .body { padding: 6px 20px 18px; border-top: 1px solid var(--line-soft); }

/* problem block */
.prob { background: var(--bg-2); border: 1px solid var(--line); border-left: 3px solid var(--purple);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 16px 20px; margin: 24px 0 10px; }
.prob .tag { font-family: var(--mono); font-size: 11.5px; color: var(--purple); letter-spacing: 1px; }
.prob p:last-child { margin-bottom: 0; }
.prob.main { border-left-color: var(--io); background: rgba(251,191,36,.055); }
.prob.main .tag { color: var(--io); }

/* ---------- SVG figure ---------- */
.fig { background: #070c1a; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px; margin: 16px 0; overflow-x: auto; }
.fig svg { display: block; margin: 0 auto; max-width: 100%; height: auto; }
.fig .cap { text-align: center; font-size: 12.6px; color: var(--txt-mute); margin-top: 10px; font-style: italic; }

/* ---------- memory map ---------- */
.memmap { display: flex; flex-direction: column; border: 1px solid var(--line);
  border-radius: var(--radius-sm); overflow: hidden; font-family: var(--mono); font-size: 12px; }
.memmap .blk { padding: 7px 12px; display: flex; justify-content: space-between; align-items: center;
  border-bottom: 1px solid rgba(0,0,0,.35); transition: .15s; }
.memmap .blk:last-child { border-bottom: none; }
.memmap .blk .rng { opacity: .92; }
.memmap .blk .nm { font-weight: 700; letter-spacing: .4px; }
.blk.rom  { background: rgba(90,169,255,.2);  color: #bcd9ff; }
.blk.ram  { background: rgba(74,222,128,.18); color: #b6f5cd; }
.blk.io   { background: rgba(251,191,36,.18); color: #ffe6a6; }
.blk.echo-rom { background: rgba(90,169,255,.075); color: #7ba3d8; }
.blk.echo-ram { background: rgba(74,222,128,.07); color: #74b78d; }
.blk.echo-io  { background: rgba(251,191,36,.07); color: #b99b52; }
.blk.free { background: #0d1428; color: #4b5a80; }
.blk.hit  { outline: 2px solid var(--accent); outline-offset: -2px; box-shadow: inset 0 0 22px rgba(85,214,255,.35); }

/* ---------- bit strip ---------- */
.bits { display: flex; gap: 3px; flex-wrap: wrap; font-family: var(--mono); margin: 10px 0; }
.bit { width: 30px; text-align: center; border: 1px solid var(--line); border-radius: 6px;
  background: var(--bg-2); padding: 3px 0; font-size: 13px; transition: .18s; }
.bit .lb { display: block; font-size: 8.5px; color: var(--txt-mute); line-height: 1.35; }
.bit.dec  { border-color: var(--accent); background: rgba(85,214,255,.16); color: var(--accent); }
.bit.chip { border-color: var(--ram); background: rgba(74,222,128,.14); color: var(--ram); }
.bit.dc   { border-color: var(--danger); background: rgba(251,113,133,.14); color: var(--danger); }

/* ---------- timing diagram ---------- */
.timing { background: #070c1a; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; margin: 16px 0; }
.timing .scroll { overflow-x: auto; }
.timing .bar { display: flex; gap: 9px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; }
.timing .now { font-family: var(--mono); font-size: 12.5px; color: var(--accent); margin-left: auto; }
.tinfo { background: var(--bg-2); border: 1px solid var(--line-soft); border-radius: var(--radius-sm);
  padding: 12px 15px; margin-top: 12px; font-size: 13.6px; min-height: 66px; }
.tinfo .h { font-family: var(--mono); font-size: 12px; color: var(--io); letter-spacing: .6px; display: block; margin-bottom: 4px; }
.tinfo .b { color: var(--txt-dim); }

/* ---------- misc ---------- */
.kv { display: grid; grid-template-columns: auto 1fr; gap: 4px 16px; font-size: 13.6px; }
.kv dt { font-family: var(--mono); color: var(--accent); }
.kv dd { margin: 0; color: var(--txt-dim); }

.footer { border-top: 1px solid var(--line-soft); margin-top: 70px; padding-top: 22px;
  font-size: 12.8px; color: var(--txt-mute); }
.footer a { color: var(--txt-dim); }

.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 48px; flex-wrap: wrap; }

.src { font-size: 12.4px; color: var(--txt-mute); }
.src a { color: var(--txt-mute); text-decoration: underline; text-underline-offset: 2px; }

.tocbox { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 20px; margin: 20px 0; }
.tocbox .t { font-size: 12.5px; font-family: var(--mono); color: var(--accent); letter-spacing: 1px; margin-bottom: 8px; }
.tocbox ul { list-style: none; padding: 0; margin: 0; columns: 2; column-gap: 26px; }
.tocbox li { margin: 3px 0; break-inside: avoid; }
.tocbox a { color: var(--txt-dim); text-decoration: none; font-size: 13.6px; }
.tocbox a:hover { color: var(--accent); }

@media (max-width: 620px) {
  .tocbox ul { columns: 1; }
  .wrap { padding: 24px 15px 80px; }
  .nav-links a { font-size: 12.5px; padding: 4px 8px; }
  .card { padding: 16px; }
}

/* light theme fallback for users forcing light */
@media (prefers-color-scheme: light) {
  /* the design is deliberately dark-only; keep it consistent */
}

/* ---------- pinout layout ---------- */
.pinwrap { display: grid; grid-template-columns: minmax(0, 580px) minmax(240px, 1fr); gap: 18px; align-items: start; }
@media (max-width: 860px) { .pinwrap { grid-template-columns: 1fr; } }
.pinwrap > * { min-width: 0; }
.pinwrap svg { max-width: 100%; height: auto; display: block; }

/* ---------- keep everything inside the viewport on phones ---------- */
@media (max-width: 700px) {
  .grid.g2, .grid.g3 { grid-template-columns: 1fr; }
  pre { font-size: 12px; }
  pre code { font-size: 12px; }
  .bits .bit { width: 26px; font-size: 12px; }
  .memmap { font-size: 10.6px; }
  .memmap .blk { flex-direction: column; align-items: flex-start; gap: 1px; }
  .ctrl-row > div { flex: 1 1 130px; }
  .kv { grid-template-columns: 1fr; gap: 0 0; }
  .kv dt { margin-top: 8px; }
  table { min-width: 380px; }
  input[type=text], select, textarea { max-width: 100%; }
}

/* ---------- two-pane lab (editor + output) ---------- */
.lab2 { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1.35fr); gap: 16px; align-items: start; }
.lab2 > * { min-width: 0; }
@media (max-width: 820px) { .lab2 { grid-template-columns: 1fr; } }

/* ============================================================
   visual helpers
   ============================================================ */

/* ---------- flow strip ---------- */
.flow { display: flex; align-items: stretch; gap: 8px; flex-wrap: wrap; margin: 18px 0; }
.flow-step {
  flex: 1 1 165px; min-width: 0; background: var(--panel); border: 1px solid var(--line);
  border-top: 3px solid var(--fc); border-radius: var(--radius-sm); padding: 12px 14px; position: relative;
}
.flow-step .fn {
  font-family: var(--mono); font-size: 11px; color: var(--fc); font-weight: 700; letter-spacing: 1px;
}
.flow-step .ft { font-weight: 700; font-size: 14px; margin: 3px 0 5px; line-height: 1.45; }
.flow-step .fd { font-size: 12.8px; color: var(--txt-dim); line-height: 1.6; }
.flow-arrow { align-self: center; color: var(--txt-mute); font-size: 18px; flex: 0 0 auto; }
@media (max-width: 760px) { .flow-arrow { display: none; } .flow-step { flex: 1 1 100%; } }

/* ---------- T-state budget bar ---------- */
.tbar { display: flex; height: 34px; border-radius: 8px; overflow: hidden; border: 1px solid var(--line); margin: 14px 0 10px; }
.tseg { display: grid; place-items: center; min-width: 2px; transition: .2s; }
.tseg span { font-family: var(--mono); font-size: 11.5px; color: #071022; font-weight: 700; }
.tlegend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 12.6px; color: var(--txt-dim); }
.tlegend i { display: inline-block; width: 11px; height: 11px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }
.tsum { margin-top: 12px; padding: 10px 14px; border-radius: var(--radius-sm); font-size: 14px; font-family: var(--mono); }
.tsum.ok { background: rgba(52,211,153,.1); border: 1px solid rgba(52,211,153,.35); color: var(--ok); }
.tsum.bad { background: rgba(251,113,133,.1); border: 1px solid rgba(251,113,133,.35); color: var(--danger); }

/* ---------- reference badge ---------- */
.refnote {
  display: inline-flex; align-items: center; gap: 9px; flex-wrap: wrap;
  font-size: 12.2px; color: var(--txt-mute); background: var(--bg-2);
  border: 1px solid var(--line-soft); border-radius: 99px; padding: 4px 14px; margin: 6px 0 14px;
}
.refnote .rl { font-family: var(--mono); font-size: 10px; letter-spacing: 1px;
  color: var(--accent); border-right: 1px solid var(--line); padding-right: 9px; }
.refnote b { color: var(--txt-dim); font-weight: 600; }

/* ---------- big visual figure ---------- */
.viz { background: #070c1a; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; margin: 18px 0; overflow-x: auto; }
.viz svg { display: block; margin: 0 auto; }
.viz .cap { text-align: center; font-size: 12.4px; color: var(--txt-mute); margin-top: 10px; }

/* ---------- verdict banner ---------- */
.verdict { display: flex; align-items: center; gap: 16px; padding: 16px 20px; border-radius: var(--radius);
  margin: 18px 0; border: 1px solid var(--line); background: var(--panel); flex-wrap: wrap; }
.verdict .big { font-family: var(--mono); font-size: 30px; font-weight: 700; line-height: 1; }
.verdict .lbl { font-size: 13.5px; color: var(--txt-dim); }
.verdict.ok  { border-color: rgba(52,211,153,.4); background: rgba(52,211,153,.07); }
.verdict.ok .big { color: var(--ok); }
.verdict.bad { border-color: rgba(251,113,133,.4); background: rgba(251,113,133,.07); }
.verdict.bad .big { color: var(--danger); }

/* ---------- side-by-side wrong/right ---------- */
.vs { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px,1fr)); gap: 14px; margin: 18px 0; }
.vs > div { border-radius: var(--radius); padding: 15px 18px; border: 1px solid var(--line); }
.vs .bad { border-color: rgba(251,113,133,.4); background: rgba(251,113,133,.06); }
.vs .good { border-color: rgba(52,211,153,.4); background: rgba(52,211,153,.06); }
.vs h5 { margin: 0 0 8px; font-size: 13.5px; font-family: var(--mono); letter-spacing: .5px; }
.vs .bad h5 { color: var(--danger); }
.vs .good h5 { color: var(--ok); }
.vs pre { margin: 0; }

/* ============================================================
   pin description panel
   ============================================================ */
.pindesc { margin: 0; max-height: 640px; overflow-y: auto; padding: 20px 22px; }
.pindesc::-webkit-scrollbar { width: 10px; }
.pindesc::-webkit-scrollbar-thumb { background: var(--line); border-radius: 99px; }

.pd-hint { font-size: 13px; color: var(--txt-mute); background: var(--bg-2);
  border: 1px dashed var(--line); border-radius: var(--radius-sm); padding: 10px 14px; }

.pd-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.pd-pinno { font-family: var(--mono); font-size: 11.5px; color: var(--gc);
  border: 1px solid var(--gc); border-radius: 99px; padding: 2px 11px; }
.pd-grpname { font-size: 12px; color: var(--txt-mute); }
.pd-title { margin: 0 0 2px; font-size: 21px; line-height: 1.35; }
.pd-en { font-family: var(--mono); font-size: 12.5px; color: var(--txt-mute); margin-bottom: 14px; }

.pd-specs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.pd-spec { font-size: 12.4px; background: var(--bg-2); border: 1px solid var(--line-soft);
  border-radius: 8px; padding: 6px 12px; color: var(--txt-dim); }
.pd-spec i { display: block; font-style: normal; font-family: var(--mono);
  font-size: 9.6px; letter-spacing: .8px; color: var(--txt-mute); margin-bottom: 2px; }

.pd-sec { margin-bottom: 16px; }
.pd-sh { font-size: 13.4px; font-weight: 700; color: var(--txt); margin-bottom: 5px;
  padding-left: 11px; border-left: 3px solid var(--accent); line-height: 1.5; }
.pd-sec p { margin: 0; font-size: 13.8px; line-height: 1.78; }
.pd-circuit .pd-sh { border-left-color: var(--purple); }
.pd-exam .pd-sh { border-left-color: var(--io); }
.pd-circuit, .pd-exam { background: var(--bg-2); border-radius: var(--radius-sm); padding: 12px 14px; }
.pd-note { background: rgba(85,214,255,.08); border: 1px solid rgba(85,214,255,.28);
  border-radius: var(--radius-sm); padding: 11px 14px; font-size: 13.2px; line-height: 1.7;
  color: var(--txt-dim); margin-bottom: 16px; }

.pd-groups { display: grid; gap: 9px; }
.pd-grp { border-left: 3px solid var(--gc); background: var(--bg-2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 10px 14px; }
.pd-grp .gn { font-weight: 700; font-size: 13.8px; color: var(--gc); }
.pd-grp .gd { font-size: 12.8px; color: var(--txt-dim); margin: 2px 0 4px; }
.pd-grp .gp { font-family: var(--mono); font-size: 10.8px; color: var(--txt-mute); line-height: 1.6; }

.pd-legend { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 12px; }
.pd-lg { font-size: 11.8px; padding: 5px 11px; color: var(--gc); border-color: var(--line); }
.pd-lg:hover { border-color: var(--gc); }

.pin .pinhit { transition: .15s; }
.pin:hover .pinhit { fill: rgba(255,255,255,.07); }
.pin.on .pinhit { fill: rgba(85,214,255,.18); stroke: #55d6ff; stroke-width: 1; }
.pin.dim { opacity: .22; }

/* chip pinout figure */
.chiptabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }

/* ============================================================
   interactive demos (latch / buffer)
   ============================================================ */
.demo { background: #070c1a; border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin: 16px 0; }
.demo-bar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 16px; }
.demo-mode { font-size: 12px; font-family: var(--mono); padding: 4px 11px; border-radius: 99px; margin-left: auto; }
.demo-mode.ok { background: rgba(52,211,153,.13); color: var(--ok); }
.demo-mode.bad { background: rgba(251,113,133,.13); color: var(--danger); }

.demo-row { display: grid; grid-template-columns: minmax(0,190px) 1fr auto; gap: 14px;
  align-items: center; padding: 10px 0; }
.demo-lbl { font-size: 13px; color: var(--txt); font-weight: 600; line-height: 1.4; }
.demo-lbl i { display: block; font-style: normal; font-size: 11px; color: var(--txt-mute); font-weight: 400; margin-top: 2px; }
.demo-val { font-family: var(--mono); font-size: 17px; color: var(--accent); font-weight: 700; min-width: 62px; text-align: right; }
.demo-arrow { text-align: center; color: var(--txt-mute); font-size: 17px; line-height: 1; }

.bbus { display: flex; gap: 4px; flex-wrap: wrap; }
.bbit { position: relative; width: 34px; height: 40px; border-radius: 6px; display: grid;
  place-items: center; font-family: var(--mono); font-size: 15px; font-weight: 700;
  border: 1px solid var(--line); background: var(--bg-2); color: var(--txt-dim); transition: .18s; }
.bbit i { position: absolute; bottom: 2px; font-style: normal; font-size: 8px; color: var(--txt-mute); font-weight: 400; }
.bbit.amber { border-color: rgba(251,191,36,.5); background: rgba(251,191,36,.12); color: var(--io); }
.bbit.green { border-color: rgba(74,222,128,.5); background: rgba(74,222,128,.12); color: var(--ram); }
.bbit.cyan  { border-color: rgba(34,211,238,.5); background: rgba(34,211,238,.12); color: #22d3ee; }
.bbit.z { border-color: rgba(148,163,184,.4); background: repeating-linear-gradient(45deg,#0d1428,#0d1428 4px,#141d38 4px,#141d38 8px); color: #94a3b8; font-size: 13px; }
.bbit.sw { cursor: pointer; border-color: rgba(34,211,238,.45); color: #22d3ee; }
.bbit.sw:hover { background: rgba(34,211,238,.2); }

.ledrow { display: flex; gap: 8px; }
.led { width: 22px; height: 22px; border-radius: 50%; background: #241305;
  border: 1.5px solid rgba(251,191,36,.4); transition: .12s; }
.led.lit { background: #fbbf24; box-shadow: 0 0 12px rgba(251,191,36,.9); border-color: #fde68a; }

.clkbox { font-family: var(--mono); font-size: 13px; padding: 9px 14px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--bg-2); color: var(--txt-mute); transition: .15s; }
.clkbox.hi { border-color: var(--purple); background: rgba(192,132,252,.18); color: #e9d5ff; font-weight: 700; }

.busline { font-family: var(--mono); font-size: 16px; font-weight: 700; padding: 10px 16px;
  border-radius: 8px; border: 1px solid var(--line); background: var(--bg-2); color: var(--accent); }
.busline.bad { border-color: var(--danger); background: rgba(251,113,133,.16); color: var(--danger); }

.demo-note { margin-top: 14px; padding: 11px 15px; border-radius: var(--radius-sm); font-size: 13.4px; line-height: 1.7; }
.demo-note.ok { background: rgba(52,211,153,.08); border: 1px solid rgba(52,211,153,.3); color: var(--txt-dim); }
.demo-note.bad { background: rgba(251,113,133,.08); border: 1px solid rgba(251,113,133,.3); color: var(--txt-dim); }

@media (max-width: 700px) {
  .demo-row { grid-template-columns: 1fr; gap: 6px; }
  .demo-val { text-align: left; }
  .bbit { width: 30px; height: 36px; font-size: 13px; }
}

/* ---------- CE gate demo ---------- */
.cegrid { display: grid; grid-template-columns: minmax(0,1.5fr) auto minmax(0,1fr) auto minmax(0,1fr);
  gap: 8px 12px; align-items: center; margin: 6px 0 4px; }
.cehdr { font-family: var(--mono); font-size: 10.5px; letter-spacing: .6px; color: var(--txt-mute);
  border-bottom: 1px solid var(--line); padding-bottom: 6px; }
.cecell { font-size: 13px; color: var(--txt-dim); padding: 5px 0; border-bottom: 1px solid var(--line-soft); }
.cecell i { display: block; font-style: normal; font-size: 10.5px; color: var(--txt-mute); margin-top: 2px; }
.cecell i.ok { color: var(--ok); }
.cecell i.bad { color: var(--danger); }
.cebit { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 7px;
  font-family: var(--mono); font-size: 16px; font-weight: 700; border: 1px solid var(--line);
  background: var(--bg-2); color: var(--txt-dim); }
.cebit.tog { cursor: pointer; border-color: var(--rom); color: var(--rom); }
.cebit.tog:hover { background: rgba(90,169,255,.2); }
.cebit.ctl { border-color: var(--purple); color: var(--purple); }
.cebit.zero { border-color: var(--ok); background: rgba(52,211,153,.16); color: var(--ok); }
.cebit.one { border-color: var(--danger); background: rgba(251,113,133,.14); color: var(--danger); }
.ceinv { color: var(--purple); font-family: var(--mono); font-size: 12px; }
.cedim { color: var(--txt-mute); font-size: 12px; }
.ceout { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; padding: 14px 18px;
  border-radius: var(--radius); border: 1px solid var(--line); background: var(--panel); }
.ceout.ok { border-color: rgba(52,211,153,.42); background: rgba(52,211,153,.08); }
.ceout .lbl { font-size: 12px; color: var(--txt-mute); }
.ceout .big { font-family: var(--mono); font-size: 26px; font-weight: 700; color: var(--txt-mute); line-height: 1.25; }
.ceout.ok .big { color: var(--ok); }
@media (max-width: 760px) {
  .cegrid { grid-template-columns: 1fr auto; }
  .cehdr:nth-child(3), .cehdr:nth-child(4), .cehdr:nth-child(5) { display: none; }
  .cecell:nth-child(5n+3), .cecell:nth-child(5n+4) { display: none; }
}

/* ---------- port decode demo (1.5.0) ---------- */
.pdbus { border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 12px 14px; margin-bottom: 16px; background: rgba(255,255,255,.015); }
.pdlbl { font-size: 11.6px; color: var(--txt-mute); margin-bottom: 9px; }
.pdrow { display: flex; gap: 7px; align-items: flex-end; flex-wrap: wrap; }
.pdbit { display: flex; flex-direction: column; align-items: center; gap: 3px; }
.pdname { font-family: var(--mono); font-size: 10.5px; color: var(--txt-mute); }
.pdhex { font-family: var(--mono); font-size: 19px; font-weight: 700; color: var(--rom);
  margin-left: 10px; padding-bottom: 5px; }
.pdquick { margin-top: 11px; font-size: 11.6px; color: var(--txt-mute);
  display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.pdquick button { font-family: var(--mono); font-size: 11.6px; padding: 3px 9px;
  border-radius: 6px; border: 1px solid var(--line); background: transparent;
  color: var(--txt-dim); cursor: pointer; }
.pdquick button:hover { border-color: var(--accent); color: var(--accent); }
.pdnaive { margin-top: 14px; padding: 12px 15px; border-radius: var(--radius-sm);
  border: 1px dashed rgba(251,113,133,.4); background: rgba(251,113,133,.06); }
.pdnaive.ok { border-color: rgba(52,211,153,.4); background: rgba(52,211,153,.06); }
.pdnh { font-size: 12.6px; font-weight: 700; color: var(--danger); margin-bottom: 7px; }
.pdnaive.ok .pdnh { color: var(--ok); }
.pdnb { font-family: var(--mono); font-size: 13.4px; color: var(--txt-dim); }
.pdnb b.ok { color: var(--ok); } .pdnb b.bad { color: var(--danger); }
.pdnn { font-size: 12.4px; color: var(--txt-mute); margin-top: 6px; line-height: 1.65; }
@media (max-width: 720px) {
  /* เดโมพอร์ต: คอลัมน์ "ค่าที่เข้า OR" ต้องไม่หาย เพราะเป็นใจความ */
  .cegrid.pd { grid-template-columns: auto auto 1fr; }
  .cegrid.pd .cehdr:nth-child(3), .cegrid.pd .cehdr:nth-child(4) { display: none; }
  .cegrid.pd .cehdr:nth-child(5) { display: block; }
  .cegrid.pd .cecell:nth-child(5n+3), .cegrid.pd .cecell:nth-child(5n+4) { display: none; }
  .cegrid.pd .cecell:nth-child(5n) { display: block; }
  .pdhex { font-size: 16px; }
}

/* ---------- foldback / image explanation (2.2) ---------- */
.fbstrip { display: flex; gap: 4px; flex-wrap: wrap; margin: 10px 0 12px; }
.fbb { display: flex; flex-direction: column; align-items: center; gap: 2px;
  min-width: 40px; padding: 6px 2px 4px; border-radius: 7px; border: 1.5px solid var(--line);
  transition: opacity .35s, transform .35s, background .3s, border-color .3s; }
.fbb .fbv { font-family: var(--mono); font-size: 18px; font-weight: 700; line-height: 1; }
.fbb .fbn { font-family: var(--mono); font-size: 9.6px; color: var(--txt-mute); }
.fbb.chip { border-color: var(--ram); background: rgba(74,222,128,.12); }
.fbb.chip .fbv { color: var(--ram); }
.fbb.dec  { border-color: var(--accent); background: rgba(85,214,255,.14); }
.fbb.dec  .fbv { color: var(--accent); }
.fbb.dc   { border-color: var(--danger); background: rgba(251,113,133,.13); }
.fbb.dc   .fbv { color: var(--danger); }
.fbb.clk  { cursor: pointer; } .fbb.clk:hover { transform: translateY(-2px); }
.fbb.dead { opacity: .2; transform: translateY(16px) scale(.82); text-decoration: line-through; }
.fbb.faded{ opacity: .28; }
.fbb.ping { animation: fbping .8s ease-in-out infinite alternate; }
@keyframes fbping { from { box-shadow: 0 0 0 0 rgba(85,214,255,.5) } to { box-shadow: 0 0 0 7px rgba(85,214,255,0) } }
.fbleg { display: flex; gap: 16px; flex-wrap: wrap; font-size: 11.8px; color: var(--txt-mute); margin-bottom: 6px; }
.fbleg i { display: inline-block; width: 11px; height: 11px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }
.fbleg i.chip { background: var(--ram); } .fbleg i.dec { background: var(--accent); } .fbleg i.dc { background: var(--danger); }
.fbctl { display: flex; gap: 9px; align-items: center; flex-wrap: wrap; margin-bottom: 11px; }
.fbctl label { font-size: 11.8px; color: var(--txt-mute); }
.fbctl input { font-family: var(--mono); font-size: 15px; text-transform: uppercase; }
.fbq { display: flex; gap: 5px; flex-wrap: wrap; }
.fbq button { font-family: var(--mono); font-size: 11.6px; padding: 4px 9px; border-radius: 6px;
  border: 1px solid var(--line); background: transparent; color: var(--txt-dim); cursor: pointer; }
.fbq button.on { border-color: var(--accent); color: var(--accent); background: rgba(85,214,255,.12); }
.fbgo { font-size: 12.4px; padding: 6px 13px; border-radius: 7px; cursor: pointer; border: 1px solid var(--line); background: transparent; color: var(--txt-dim); }
.fbgo.w { border-color: var(--io); color: var(--io); } .fbgo.r { border-color: var(--accent); color: var(--accent); }
.fblbl { font-size: 12.2px; color: var(--txt-mute); margin-bottom: 4px; }
.fbres { padding: 10px 14px; border-radius: var(--radius-sm); font-size: 13.2px; margin: 10px 0;
  border: 1px solid var(--line); color: var(--txt-dim); }
.fbres.ok { border-color: rgba(52,211,153,.4); background: rgba(52,211,153,.07); }
.fbres.bad { border-color: rgba(251,113,133,.4); background: rgba(251,113,133,.07); }
.fbsub { font-size: 11.6px; color: var(--txt-mute); margin-top: 4px; }
.fbmsg { padding: 11px 14px; border-radius: var(--radius-sm); font-size: 13.2px; line-height: 1.7; color: var(--txt-dim); margin-bottom: 12px; }
.fbmsg.ok { background: rgba(52,211,153,.09); border: 1px solid rgba(52,211,153,.32); }
.fbmsg.bad { background: rgba(251,113,133,.09); border: 1px solid rgba(251,113,133,.32); }
.fbmsg.warn { background: rgba(251,191,36,.09); border: 1px solid rgba(251,191,36,.32); }
.fbempty { font-size: 12.6px; color: var(--txt-mute); padding: 14px; border: 1px dashed var(--line); border-radius: var(--radius-sm); }
.fbal { display: inline-block; font-family: var(--mono); font-size: 11.6px; padding: 2px 7px; margin: 2px 3px 2px 0;
  border-radius: 5px; border: 1px solid var(--line-soft); color: var(--txt-mute); }
.fbal.now { border-color: var(--accent); color: var(--accent); background: rgba(85,214,255,.12); }
.fbal.hot, .fbal.done { border-color: var(--ok); color: var(--ok); background: rgba(52,211,153,.1); }
.fbal.real { border-color: var(--ram); color: var(--ram); background: rgba(74,222,128,.12); }
.fbtry { margin-top: 14px; padding: 12px 16px; border-radius: var(--radius-sm);
  background: rgba(85,214,255,.06); border: 1px solid rgba(85,214,255,.3); font-size: 13px; color: var(--txt-dim); }
.fbtry ol { margin: 7px 0 0; padding-left: 20px; } .fbtry li { margin: 3px 0; }
.fbderive { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); gap: 12px; margin: 14px 0; }
.fbd { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 12px 14px; background: rgba(255,255,255,.015); }
.fbdh { font-size: 13px; font-weight: 700; color: var(--accent); margin-bottom: 6px; }
.fbd p { font-size: 12.8px; line-height: 1.75; color: var(--txt-dim); margin: 0; }
.fbeq { font-family: var(--mono); font-size: 15px; color: var(--txt); margin-top: 9px;
  padding: 8px 11px; border-radius: 7px; background: rgba(85,214,255,.09); }
.fbeq span { font-size: 10.4px; color: var(--txt-mute); } .fbeq b { color: var(--danger); }
.fbnote { display: block; font-size: 11.4px; color: var(--txt-mute); margin-top: 4px; }
.fbsum { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; padding: 14px 18px;
  border-radius: var(--radius-sm); border: 1px solid var(--line); }
.fbsum.ok { border-color: rgba(52,211,153,.42); background: rgba(52,211,153,.07); }
.fbsum.bad { border-color: rgba(251,113,133,.42); background: rgba(251,113,133,.07); }
.fbsum .lbl { font-size: 11.6px; color: var(--txt-mute); }
.fbsum .big { font-family: var(--mono); font-size: 26px; font-weight: 700; color: var(--danger); line-height: 1.25; }
.fbsum.ok .big { color: var(--ok); }
.fbbases { margin-top: 4px; }
/* animation */
.fbanim .fbarow { display: flex; gap: 4px; flex-wrap: wrap; margin: 12px 0 14px; }
.fbahdr { font-size: 15px; color: var(--txt); font-family: var(--mono); }
.fbahdr i { font-style: normal; font-size: 12px; color: var(--ram); }
.fbahdr i.gh { color: var(--danger); }
.fbastep { display: flex; gap: 10px; align-items: center; font-size: 13.2px; color: var(--txt-dim);
  padding: 9px 13px; border-radius: var(--radius-sm); background: rgba(85,214,255,.07); border: 1px solid rgba(85,214,255,.28); }
.fbastep .num { flex: none; width: 22px; height: 22px; display: grid; place-items: center; border-radius: 50%;
  background: var(--accent); color: #04101d; font-weight: 700; font-size: 12px; }
.fbadown { text-align: center; opacity: 0; transition: opacity .4s; margin: 12px 0; }
.fbadown.show { opacity: 1; }
.fbaarrow { font-size: 12.4px; color: var(--txt-mute); }
.fbabin { font-family: var(--mono); font-size: 17px; color: var(--ram); margin-top: 4px; }
.fbachip { margin-top: 12px; padding: 14px; border-radius: var(--radius-sm);
  border: 2px solid var(--line); text-align: center; transition: border-color .4s, background .4s; }
.fbachip.hit { border-color: var(--ok); background: rgba(52,211,153,.07); }
.fbaname { font-family: var(--mono); font-size: 13px; color: var(--txt-mute); margin-bottom: 9px; }
.fbacells { display: inline-flex; flex-direction: column; gap: 4px; }
.fbarow2 { display: flex; gap: 4px; }
.fbcell { width: 22px; height: 15px; border-radius: 3px; background: rgba(255,255,255,.05); transition: all .35s; }
.fbcell.tgt { background: rgba(251,191,36,.25); }
.fbcell.on { background: var(--ok); box-shadow: 0 0 12px rgba(52,211,153,.75); }
.fbahit { font-size: 12.8px; color: var(--txt-dim); margin-top: 10px; }
.fbatally { margin-top: 12px; }
@media (max-width: 720px) {
  .fbb { min-width: 30px; padding: 4px 1px 3px; } .fbb .fbv { font-size: 14px; } .fbb .fbn { font-size: 8.4px; }
  .fbstrip, .fbanim .fbarow { gap: 2.5px; }
}
.jobn { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center;
  font-family: var(--mono); font-weight: 700; font-size: 13.5px; color: #04101d; }
.jobn.ram { background: var(--ram); } .jobn.dec { background: var(--accent); } .jobn.dc { background: var(--danger); }
.warn-t { color: var(--warn); font-weight: 700; }

/* ---------- register swap demo (3.1) ---------- */
.regwrap { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; justify-content: center; }
.regcol { flex: 1; min-width: 210px; }
.reghd { font-size: 12px; color: var(--txt-dim); margin-bottom: 8px; text-align: center; }
.reghd.dim { color: var(--txt-mute); }
.regrow { display: flex; gap: 6px; margin-bottom: 6px; }
.regc { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 1px;
  padding: 7px 4px 5px; border-radius: 7px; border: 1.6px solid var(--line);
  transition: background .3s, border-color .3s, transform .3s; }
.regc.gp { border-color: rgba(74,222,128,.5); } .regc.acc { border-color: rgba(251,191,36,.55); }
.regc.alt { border-style: dashed; opacity: .72; }
.regc .rn { font-family: var(--mono); font-size: 10.4px; color: var(--txt-mute); }
.regc .rv { font-family: var(--mono); font-size: 17px; font-weight: 700; color: var(--txt); }
.regc.gp .rv { color: var(--ram); } .regc.acc .rv { color: var(--io); }
.regc.flash { background: rgba(192,132,252,.22); border-color: var(--purple); transform: scale(1.07); }
.regmid { flex: none; text-align: center; width: 116px; }
.regarrow { font-size: 30px; color: var(--purple); line-height: 1; }
.regmnote { font-size: 10.6px; color: var(--txt-mute); margin-top: 6px; line-height: 1.55; }
.reglog { margin-top: 14px; padding: 10px 13px; border-radius: var(--radius-sm);
  background: rgba(192,132,252,.07); border: 1px solid rgba(192,132,252,.28);
  font-size: 12.4px; color: var(--txt-dim); font-family: var(--mono); line-height: 1.85; }
@media (max-width: 720px) { .regmid { width: 100%; } .regarrow { font-size: 22px; } }

/* ---------- แจ้งเตือนเวลา JS โหลดไม่ครบ ---------- */
#jsfail { position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 9999;
  max-width: 620px; margin: 0 auto; padding: 14px 18px; border-radius: var(--radius);
  background: rgba(251,113,133,.14); border: 1px solid var(--danger);
  color: var(--txt); font-size: 13.4px; line-height: 1.7;
  box-shadow: 0 12px 40px rgba(0,0,0,.55); }
#jsfail .jsfail-d { font-family: var(--mono); font-size: 11px; color: var(--txt-mute);
  margin: 7px 0 9px; word-break: break-word; }
#jsfail button { font-size: 12.6px; padding: 6px 14px; border-radius: 7px; cursor: pointer;
  border: 1px solid var(--danger); background: transparent; color: var(--danger); }
.mounterr { padding: 14px 16px; border-radius: var(--radius-sm);
  border: 1px dashed var(--danger); background: rgba(251,113,133,.07);
  color: var(--txt-dim); font-size: 13px; line-height: 1.7; }
.mounterr code { font-size: 11px; color: var(--txt-mute); }

/* ---------- flag meaning cards + flag lab (3.1) ---------- */
.flagcards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); gap: 12px; margin: 14px 0; }
.flagcard { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 12px 14px;
  background: rgba(255,255,255,.015); }
.flagcard.ok { border-left: 3px solid var(--ok); }
.flagcard.warn { border-left: 3px solid var(--warn); }
.flagcard.off { border-left: 3px solid var(--line); opacity: .72; }
.fch { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; margin-bottom: 9px; }
.fcb { font-family: var(--mono); font-size: 10.4px; color: var(--txt-mute); }
.fcn { font-family: var(--mono); font-size: 20px; font-weight: 700; color: var(--txt); }
.fcf { font-size: 11.6px; color: var(--txt-mute); }
.fcv { display: flex; gap: 9px; align-items: flex-start; font-size: 12.6px; line-height: 1.65;
  padding: 7px 9px; border-radius: 6px; margin-bottom: 5px; color: var(--txt-dim); }
.fcv.one { background: rgba(52,211,153,.09); }
.fcv.zero { background: rgba(255,255,255,.035); }
.fcv .tag { flex: none; font-family: var(--mono); font-size: 11px; font-weight: 700;
  padding: 2px 7px; border-radius: 5px; }
.fcv.one .tag { background: rgba(52,211,153,.2); color: var(--ok); }
.fcv.zero .tag { background: rgba(255,255,255,.07); color: var(--txt-mute); }
.fcnote { font-size: 11.8px; color: var(--txt-mute); line-height: 1.7; margin: 7px 0; }
.fcjp { display: flex; gap: 14px; flex-wrap: wrap; font-size: 11.6px; color: var(--txt-mute);
  border-top: 1px solid var(--line-soft); padding-top: 8px; }
.fcjp code { font-size: 11.6px; color: var(--accent); }
.fcjp.none { color: var(--txt-mute); font-style: italic; }
.fcex { margin-top: 8px; font-size: 11.8px; color: var(--txt-dim); font-family: var(--mono);
  background: rgba(85,214,255,.06); padding: 7px 10px; border-radius: 6px; line-height: 1.65; }
.flagcalc { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 11px 14px; margin-bottom: 13px; }
.fcline { font-size: 13px; color: var(--txt-dim); font-family: var(--mono); margin: 3px 0; }
.fcline .lbl { display: inline-block; min-width: 112px; color: var(--txt-mute); font-size: 11.4px; font-family: var(--sans, inherit); }
.fcline i { font-style: normal; color: var(--warn); font-size: 11.6px; }
.flagout { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px,1fr)); gap: 9px; }
.fo { border-radius: var(--radius-sm); padding: 9px 12px; border: 1px solid var(--line); }
.fo.on { border-color: rgba(52,211,153,.45); background: rgba(52,211,153,.08); }
.fo.off { background: rgba(255,255,255,.02); }
.fov { font-family: var(--mono); font-size: 15px; font-weight: 700; color: var(--txt-mute); }
.fo.on .fov { color: var(--ok); }
.fod { font-size: 11.6px; color: var(--txt-mute); line-height: 1.6; margin-top: 3px; }