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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>BitBench</title>
<link rel="manifest" href="manifest.webmanifest" />
<link rel="icon" type="image/svg+xml" href="icon.svg" />
<link rel="apple-touch-icon" href="icon.svg" />
<meta name="theme-color" media="(prefers-color-scheme: dark)" content="#07111f" />
<meta name="theme-color" media="(prefers-color-scheme: light)" content="#eef2f7" />
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="apple-mobile-web-app-title" content="BitBench" />
<meta name="description" content="Engineering utility — number, bit ops, freq/time, dB, rise/BW, Ohm, IEEE 754" />
<style>
/* ── CSS Variables ──────────────────────────────────────── */
:root {
/* ── theme: dark ── */
--bg: #07111f;
--surface: #0d1a2d;
--surface2: #13233c;
--border: #1b3050;
--border2: #2a4569;
--text: #dde8f7;
--text2: #8aa4c4;
--text3: #5f7da3; /* faint but readable (labels, hints) */
--text4: #2e4564; /* decoration only (zero bits, separators) */
--blue: #5b9bff;
--blue-bg: rgba(91,155,255,.12);
--blue-bd: rgba(91,155,255,.30);
--green: #3ce08f;
--green-bg: rgba(61,224,143,.15);
--green-bd: rgba(61,224,143,.35);
--red: #ff7d7d;
--red-bg: rgba(255,125,125,.12);
--red-bd: rgba(255,125,125,.30);
--amber: #fcc63a;
--amber-bg: rgba(252,198,58,.12);
--amber-bd: rgba(252,198,58,.30);
--focus-ring: rgba(91,155,255,.40);
--shadow-1: 0 1px 2px rgba(0,0,0,.35);
--shadow-2: 0 6px 20px rgba(0,0,0,.45);
/* ── semantic states ── */
--state-known: var(--blue);
--state-known-bg: var(--blue-bg);
--state-known-bd: var(--blue-bd);
--state-computed: var(--green);
--state-computed-bg: var(--green-bg);
--state-computed-bd: var(--green-bd);
--ieee-sign: #f87171;
--ieee-exp: #fbbf24;
--ieee-mant: #60a5fa;
/* ── typography ── */
--font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
--font-mono: ui-monospace, 'SF Mono', 'Cascadia Code', 'JetBrains Mono',
'Fira Code', Menlo, Consolas, monospace;
/* ── spacing / radius / focus ── */
--sp-1: 4px; --sp-2: 8px; --sp-3: 12px; --sp-4: 16px; --sp-5: 20px; --sp-6: 24px;
--r-xs: 5px; --r-sm: 7px; --r-md: 10px; --r-lg: 13px; --r-pill: 999px;
--ring: 0 0 0 3px var(--focus-ring);
--bit-lbl-w: 28px; /* bit-row label width; byte strip offsets by it */
}
html.light {
--bg: #eef2f7;
--surface: #ffffff;
--surface2: #f6f8fb;
--border: #dfe6ef;
--border2: #c3cfdd;
--text: #0f172a;
--text2: #44566e;
--text3: #64748b;
--text4: #9aa8ba;
--blue: #2563eb;
--blue-bg: rgba(37,99,235,.08);
--blue-bd: rgba(37,99,235,.30);
--green: #15803d;
--green-bg: rgba(21,128,61,.10);
--green-bd: rgba(21,128,61,.30);
--red: #dc2626;
--red-bg: rgba(220,38,38,.08);
--red-bd: rgba(220,38,38,.30);
--amber: #b45309;
--amber-bg: rgba(180,83,9,.10);
--amber-bd: rgba(180,83,9,.30);
--focus-ring: rgba(37,99,235,.30);
--shadow-1: 0 1px 2px rgba(15,23,42,.06);
--shadow-2: 0 6px 20px rgba(15,23,42,.10);
--ieee-sign: #dc2626;
--ieee-exp: #b45309;
--ieee-mant: #2563eb;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
font-family: var(--font-sans);
background: var(--bg);
color: var(--text);
min-height: 100vh;
min-height: 100svh; /* svh = smallest viewport (toolbars shown);
keeps the footer in view on iOS WebKit,
which mishandles dvh with the bottom bar */
display: flex;
flex-direction: column;
}
/* ── Fade-in animation ──────────────────────────────────── */
@keyframes fadeIn {
from { opacity: 0; transform: translateY(4px); }
to { opacity: 1; transform: translateY(0); }
}
.panel.on { animation: fadeIn 120ms ease both; }
/* ── Header ─────────────────────────────────────────────── */
header {
position: sticky; top: 0; z-index: 100;
background: var(--surface);
border-bottom: 1px solid var(--border);
box-shadow: var(--shadow-1);
height: 52px;
padding: 0 20px;
display: flex;
align-items: center;
gap: 14px;
}
.logo {
font-weight: 700;
font-size: 0.9rem;
letter-spacing: 0.01em;
color: var(--text);
white-space: nowrap;
}
.logo span { color: var(--blue); }
.spacer { flex: 1; }
/* Scrollable pill nav */
.tab-nav {
display: flex;
align-items: center;
gap: 4px;
min-width: 0;
}
.tab-scroll-btn {
display: none;
align-items: center;
justify-content: center;
width: 24px;
height: 28px;
background: var(--surface2);
border: 1px solid var(--border);
border-radius: 6px;
color: var(--text2);
font-size: 1rem;
line-height: 1;
padding: 0 0 2px;
cursor: pointer;
flex-shrink: 0;
user-select: none;
transition: border-color 0.15s, color 0.15s;
}
.tab-scroll-btn:hover { border-color: var(--border2); color: var(--text); }
.tab-scroll-btn:disabled { opacity: 0.35; cursor: default; }
.tab-scroll-btn:disabled:hover { border-color: var(--border); color: var(--text2); }
.tab-nav.scrollable .tab-scroll-btn { display: flex; }
.tab-scroll-btn:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
.tab-group {
display: flex;
background: var(--bg);
border: 1px solid var(--border);
border-radius: 8px;
padding: 3px;
gap: 2px;
overflow-x: auto;
scrollbar-width: none;
-ms-overflow-style: none;
}
.tab-group::-webkit-scrollbar { display: none; }
.tab-btn {
background: none;
border: none;
border-radius: 6px;
color: var(--text2);
font-size: 0.78rem;
font-weight: 500;
padding: 6px 14px;
cursor: pointer;
transition: background 0.15s, color 0.15s;
white-space: nowrap;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.on {
background: var(--surface2);
color: var(--text);
font-weight: 600;
box-shadow: inset 0 0 0 1px var(--border2), var(--shadow-1);
}
.theme-btn {
background: none;
border: 1px solid var(--border);
border-radius: 6px;
color: var(--text2);
font-size: 0.72rem;
padding: 5px 10px;
cursor: pointer;
transition: border-color 0.15s, color 0.15s;
white-space: nowrap;
flex-shrink: 0;
}
.theme-btn:hover { border-color: var(--border2); color: var(--text); }
/* ── Main ───────────────────────────────────────────────── */
main {
max-width: 820px;
width: 100%;
margin: 0 auto;
padding: 24px 16px;
flex: 1 0 auto;
}
.panel { display: none; }
.panel.on { display: block; }
/* ── Card ───────────────────────────────────────────────── */
.card {
background: var(--surface);
border: 1px solid var(--border);
border-radius: 12px;
padding: 18px 20px;
margin-bottom: 14px;
}
.sec-label {
font-size: 0.66rem;
font-weight: 700;
text-transform: uppercase;
letter-spacing: 0.12em;
color: var(--text3);
margin-bottom: 12px;
}
/* ── Form controls ──────────────────────────────────────── */
.row { display: flex; gap: 8px; align-items: stretch; }
.field {
flex: 1;
min-width: 0;
background: var(--surface2);
border: 1px solid var(--border);
border-radius: 8px;
color: var(--text);
font-size: 0.95rem;
font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
padding: 9px 13px;
outline: none;
transition: border-color 0.15s, box-shadow 0.15s;
}
.field:focus {
border-color: var(--blue);
box-shadow: var(--ring);
}
.field::placeholder { color: var(--text3); }
.sel {
background: var(--surface2);
border: 1px solid var(--border);
border-radius: 8px;
color: var(--text);
font-size: 0.82rem;
padding: 9px 8px;
outline: none;
cursor: pointer;
min-width: 64px;
flex-shrink: 0;
}
.sel:focus { border-color: var(--blue); box-shadow: var(--ring); }
/* ── Number output ──────────────────────────────────────── */
.numout {
margin-top: 10px;
background: var(--surface2);
border: 1px solid var(--border);
border-radius: 8px;
padding: 10px 14px;
font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
font-size: 0.88rem;
min-height: 42px;
display: flex;
align-items: center;
gap: 10px;
flex-wrap: wrap;
}
.out-chunk { display: flex; align-items: center; gap: 5px; }
.out-tag {
font-size: 0.6rem;
font-weight: 700;
letter-spacing: 0.08em;
text-transform: uppercase;
color: var(--text3);
background: var(--border);
border-radius: 3px;
padding: 1px 5px;
}
.out-sep { color: var(--text4); }
.op-hint {
margin-top: 7px;
font-size: 0.68rem;
font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
color: var(--text3);
line-height: 1.6;
}
.op-hint b { color: var(--text2); font-weight: 600; }
.copy-btn {
background: none;
border: 1px solid var(--border);
border-radius: var(--r-xs);
color: var(--text3);
font-size: 0.72rem;
padding: 3px 7px;
min-width: 24px;
min-height: 22px;
cursor: pointer;
line-height: 1.4;
transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.copy-btn:hover { border-color: var(--border2); color: var(--text); background: var(--surface2); }
.copy-btn.copied { border-color: var(--green); color: var(--green); }
/* ── Bit matrix ─────────────────────────────────────────── */
.bits-wrap {
background: var(--surface);
border: 1px solid var(--border);
border-radius: 12px;
padding: 16px 18px;
}
.bits-head {
display: grid;
grid-template-columns: 1fr auto 1fr;
align-items: center;
margin-bottom: 14px;
gap: 8px;
}
.bits-head-left { display: flex; gap: 5px; align-items: center; justify-self: start; }
.bits-head-title { text-align: center; }
.bits-head > :last-child { justify-self: end; }
.bit-ctrl-btn {
background: var(--surface2);
border: 1px solid var(--border);
border-radius: 5px;
color: var(--text2);
font-size: 0.68rem;
font-weight: 600;
padding: 3px 8px;
cursor: pointer;
transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.bit-ctrl-btn:hover { border-color: var(--border2); color: var(--text); }
.bit-ctrl-btn.on { border-color: var(--blue); color: var(--blue); background: var(--blue-bg); }
.popbadge {
font-size: 0.68rem;
font-family: monospace;
background: var(--green-bg);
color: var(--green);
border: 1px solid var(--green-bd);
border-radius: var(--r-xs);
padding: 2px 8px;
}
/* Bits scroll wrap with overflow hint */
.bits-scroll-wrap {
position: relative;
overflow: hidden;
}
.bits-scroll-wrap::after {
content: '';
position: absolute;
right: 0; top: 0; bottom: 0;
width: 48px;
background: linear-gradient(to right, transparent, var(--surface));
pointer-events: none;
opacity: 0;
transition: opacity 0.2s;
}
.bits-scroll-wrap.overflows::after { opacity: 1; }
.bits-scroll {
overflow-x: auto;
overflow-y: visible;
padding-bottom: 2px;
}
#bitMatrix {
display: flex;
flex-direction: column;
gap: 5px;
align-items: center;
}
.bit-row {
display: flex;
gap: 3px;
align-items: center;
}
.row-lbl {
font-size: 0.6rem;
font-family: monospace;
color: var(--text3);
width: var(--bit-lbl-w);
text-align: right;
padding-right: 6px;
flex-shrink: 0;
}
.bit {
width: 23px;
height: 23px;
display: flex;
align-items: center;
justify-content: center;
border-radius: var(--r-xs);
background: var(--surface2);
border: 1px solid var(--border);
font-family: monospace;
font-size: 0.72rem;
color: var(--text4);
cursor: pointer;
position: relative;
user-select: none;
transition: border-color 0.1s, background 0.1s;
}
.bit:hover { border-color: var(--border2); background: var(--border); color: var(--text2); }
.bit.on {
background: var(--green-bg);
border-color: var(--green-bd);
color: var(--green);
font-weight: 700;
}
.bit.on:hover { background: rgba(61,224,143,.24); border-color: var(--green); }
.ngap { width: 5px; flex-shrink: 0; }
.bgap { width: 15px; flex-shrink: 0; position: relative; }
.bgap::after {
content: '';
position: absolute;
left: 50%; top: 12%; bottom: 12%;
width: 1px;
background: var(--border);
}
.bit:hover::after {
content: attr(data-t);
position: absolute;
bottom: calc(100% + 5px);
left: 50%;
transform: translateX(-50%);
background: var(--surface2);
color: var(--text);
border: 1px solid var(--border2);
border-radius: 4px;
padding: 2px 6px;
font-size: 0.6rem;
white-space: nowrap;
z-index: 20;
pointer-events: none;
}
/* ── Byte strip ─────────────────────────────────────────── */
.byte-strip {
display: flex;
gap: 5px;
margin-top: 12px;
justify-content: center;
overflow-x: auto;
padding-bottom: 2px;
/* Offset by the row-label width so the strip centers under the
bits (which are pushed right of center by their labels). */
padding-left: var(--bit-lbl-w);
}
.byte-cell {
background: var(--surface2);
border: 1px solid var(--border);
border-radius: 6px;
padding: 5px 8px;
text-align: center;
flex: 0 0 52px;
}
.byte-cell-lbl {
font-size: 0.56rem;
color: var(--text3);
font-family: monospace;
margin-bottom: 2px;
}
.byte-cell-val {
font-family: 'SF Mono', 'Cascadia Code', monospace;
font-size: 0.79rem;
color: var(--text);
}
/* ── Field map ──────────────────────────────────────────── */
.fieldmap-section {
margin-top: 14px;
border-top: 1px solid var(--border);
padding-top: 12px;
}
.fieldmap-section .sec-label { margin-bottom: 8px; }
.fieldmap-ta {
width: 100%;
background: var(--surface2);
border: 1px solid var(--border);
border-radius: 8px;
color: var(--text);
font-family: 'SF Mono','Cascadia Code','Fira Code',monospace;
font-size: 0.8rem;
padding: 8px 10px;
resize: vertical;
outline: none;
}
.fieldmap-ta:focus { border-color: var(--blue); }
.fieldmap-ta::placeholder { color: var(--text3); }
.fieldmap-hint {
font-size: 0.63rem;
color: var(--text3);
margin-top: 5px;
font-family: monospace;
}
.fieldmap-values {
margin-top: 10px;
display: flex;
flex-direction: column;
gap: 5px;
}
.fmv-row {
display: flex;
align-items: center;
gap: 10px;
font-family: monospace;
font-size: 0.78rem;
padding: 5px 8px;
border-radius: 6px;
background: var(--surface2);
border: 1px solid var(--border);
}
.fmv-name {
font-weight: 700;
min-width: 70px;
}
.fmv-range { color: var(--text3); font-size: 0.7rem; }
.fmv-hex { color: var(--text2); }
.fmv-dec { color: var(--text); }
/* ── Freq ↔ Time ────────────────────────────────────────── */
.preset-row {
display: flex;
flex-wrap: wrap;
gap: 5px;
margin-bottom: 12px;
}
.preset-btn {
background: var(--surface2);
border: 1px solid var(--border);
border-radius: var(--r-pill);
color: var(--text2);
font-size: 0.7rem;
font-weight: 600;
padding: 3px 10px;
cursor: pointer;
transition: border-color 0.15s, color 0.15s, background 0.15s;
white-space: nowrap;
}
.preset-btn:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-bg); }
.two-col {
display: grid;
grid-template-columns: 1fr 36px 1fr;
align-items: start;
}
.arrow-mid {
display: flex;
align-items: flex-start;
justify-content: center;
padding-top: 34px;
color: var(--text3);
font-size: 1rem;
}
.side-label {
font-size: 0.7rem;
font-weight: 600;
text-transform: uppercase;
letter-spacing: 0.09em;
color: var(--text2);
margin-bottom: 9px;
}
.unit-grid {
display: grid;
grid-template-columns: repeat(3, 1fr);
gap: 6px;
margin-top: 11px;
}
.unit-cell {
background: var(--surface2);
border: 1px solid var(--border);
border-radius: var(--r-sm);
padding: 8px 10px;
min-width: 0;
cursor: pointer;
transition: border-color 0.15s, background 0.15s;
}
.unit-cell:hover { border-color: var(--border2); }
.unit-cell.hi { border-color: var(--blue-bd); background: var(--blue-bg); }
.unit-cell.flash {
border-color: var(--green) !important;
background: var(--green-bg) !important;
transition: border-color 0s, background 0s;
}
.unit-cell-label {
font-size: 0.59rem;
font-weight: 700;
text-transform: uppercase;
letter-spacing: 0.07em;
color: var(--text3);
margin-bottom: 3px;
}
.unit-cell.hi .unit-cell-label { color: var(--blue); }
.unit-cell-val {
font-family: 'SF Mono', 'Cascadia Code', monospace;
font-size: 0.78rem;
color: var(--text);
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
.unit-cell.hi .unit-cell-val { color: var(--blue); }
.derived-row {
margin-top: 10px;
font-size: 0.78rem;
color: var(--text2);
display: flex;
gap: 16px;
flex-wrap: wrap;
font-family: monospace;
padding: 6px 2px 0;
border-top: 1px solid var(--border);
}
.derived-row span { color: var(--text); }
/* ── dB Tab ─────────────────────────────────────────────── */
.mode-pills {
display: flex;
gap: 4px;
margin-bottom: 14px;
}
.mode-pill {
background: var(--surface2);
border: 1px solid var(--border);
border-radius: var(--r-pill);
color: var(--text2);
font-size: 0.75rem;
font-weight: 600;
padding: 4px 14px;
cursor: pointer;
transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.mode-pill:hover { border-color: var(--border2); color: var(--text); }
.mode-pill.on { border-color: var(--blue-bd); color: var(--blue); background: var(--blue-bg); }
.ref-table {
width: 100%;
border-collapse: collapse;
margin-top: 10px;
font-family: monospace;
font-size: 0.78rem;
}
.ref-table th {
font-size: 0.6rem;
font-weight: 700;
text-transform: uppercase;
letter-spacing: 0.08em;
color: var(--text3);
text-align: left;
padding: 5px 8px;
border-bottom: 1px solid var(--border);
}
.ref-table td {
padding: 5px 8px;
border-bottom: 1px solid var(--border);
color: var(--text);
}
.ref-table tr { cursor: pointer; }
.ref-table tr:hover td { background: var(--surface2); }
.ref-table tr:last-child td { border-bottom: none; }
/* ── Rise/BW Tab ────────────────────────────────────────── */
.result-models {
margin-top: 14px;
display: flex;
flex-direction: column;
gap: 8px;
}
.model-card {
background: var(--surface2);
border: 1px solid var(--border);
border-radius: 8px;
padding: 10px 14px;
display: flex;
align-items: center;
gap: 12px;
flex-wrap: wrap;
}
.model-name {
font-size: 0.72rem;
font-weight: 700;
color: var(--text2);
min-width: 120px;
}
.model-formula {
font-family: monospace;
font-size: 0.72rem;
color: var(--text3);
flex: 1;
}
.model-val {
font-family: monospace;
font-size: 0.85rem;
color: var(--blue);
font-weight: 700;
}
/* ── Ohm's Law Tab ──────────────────────────────────────── */
.ohm-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 10px;
margin-bottom: 14px;
}
.ohm-field-group { display: flex; flex-direction: column; gap: 5px; }
.ohm-field-label {
font-size: 0.7rem;
font-weight: 700;
color: var(--text2);
letter-spacing: 0.05em;
}
.ohm-result {
margin-top: 4px;
}
.ohm-results-grid {
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: 8px;
}
.orc {
background: var(--surface2);
border: 1px solid var(--border);
border-radius: 8px;
padding: 8px 10px;
text-align: center;
}
.orc.known { border-color: var(--state-known-bd); background: var(--state-known-bg); }
.orc.computed { border-color: var(--state-computed-bd); background: var(--state-computed-bg); }
.orc-label {
font-size: 0.6rem;
font-weight: 700;
text-transform: uppercase;
letter-spacing: 0.1em;
color: var(--text3);
margin-bottom: 4px;
}
.orc.known .orc-label { color: var(--state-known); }
.orc.computed .orc-label { color: var(--state-computed); }
.orc-val {
font-family: monospace;
font-size: 0.82rem;
color: var(--text);
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
.orc.known .orc-val { color: var(--state-known); }
.orc.computed .orc-val { color: var(--state-computed); }
.ohm-placeholder {
color: var(--text3);
font-size: 0.8rem;
text-align: center;
padding: 12px;
}
/* ── IEEE 754 Tab ───────────────────────────────────────── */
.field-legend {
display: flex;
gap: 10px;
flex-wrap: wrap;
margin-bottom: 14px;
}
.legend-pill {
display: flex;
align-items: center;
gap: 5px;
font-size: 0.72rem;
font-weight: 600;
padding: 3px 10px;
border-radius: var(--r-pill);
}
.legend-dot { width: 8px; height: 8px; border-radius: 50%; }
.legend-sign { background: var(--red-bg); border: 1px solid var(--red-bd); color: var(--ieee-sign); }
.legend-exp { background: var(--amber-bg); border: 1px solid var(--amber-bd); color: var(--ieee-exp); }
.legend-mant { background: var(--blue-bg); border: 1px solid var(--blue-bd); color: var(--ieee-mant); }
.legend-sign .legend-dot { background: var(--ieee-sign); }
.legend-exp .legend-dot { background: var(--ieee-exp); }
.legend-mant .legend-dot { background: var(--ieee-mant); }
.ieee-info {
margin-top: 14px;
}
.ieee-info table {
width: 100%;
border-collapse: collapse;
font-family: monospace;
font-size: 0.8rem;
}
.ieee-info td {
padding: 5px 8px;
border-bottom: 1px solid var(--border);
vertical-align: top;
}
.ieee-info td:first-child {
color: var(--text3);
font-size: 0.7rem;
font-weight: 700;
text-transform: uppercase;
letter-spacing: 0.06em;
width: 80px;
white-space: nowrap;
}
.ieee-info tr:last-child td { border-bottom: none; }
.ieee-val { color: var(--text); }
.ieee-sub { color: var(--text2); font-size: 0.72rem; margin-top: 2px; }
/* category badges */
.cat-badge {
display: inline-block;
font-size: 0.68rem;
font-weight: 700;
padding: 1px 8px;
border-radius: 4px;
letter-spacing: 0.04em;
}
.cat-normal { background: var(--blue-bg); color: var(--blue); border: 1px solid var(--blue-bd); }
.cat-denormal { background: var(--amber-bg); color: var(--amber); border: 1px solid var(--amber-bd); }
.cat-zero { background: var(--surface2); color: var(--text2); border: 1px solid var(--border); }
.cat-inf { background: var(--red-bg); color: var(--red); border: 1px solid var(--red-bd); }
.cat-nan { background: var(--red-bg); color: var(--red); border: 1px solid var(--red-bd); }
/* ── Typography: one mono stack + tabular figures ───────── */
/* Late in the sheet so it wins over earlier per-component
font-family declarations of equal specificity. */
.field, .numout, .unit-cell-val, .bit, .row-lbl,
.byte-cell-lbl, .byte-cell-val, .fieldmap-ta, .fieldmap-hint,
.fmv-row, .ref-table, .op-hint, .orc-val, .model-val,
.model-formula, .ieee-info table, .popbadge, .derived-row {
font-family: var(--font-mono);
font-feature-settings: "tnum" 1, "zero" 1;
font-variant-numeric: tabular-nums slashed-zero;
}
/* ── Focus visibility (keyboard users) ──────────────────── */
.tab-btn:focus-visible, .mode-pill:focus-visible,
.preset-btn:focus-visible, .bit-ctrl-btn:focus-visible,
.copy-btn:focus-visible,
.theme-btn:focus-visible, .bit:focus-visible,
.unit-cell:focus-visible {
outline: 2px solid var(--blue);
outline-offset: 2px;
}
/* ── Guide / Help ───────────────────────────────────────── */
.guide-intro {
font-size: 0.85rem;
line-height: 1.6;
color: var(--text2);
}
.guide-card { padding: 16px 20px; }
.guide-head {
display: flex;
align-items: center;
gap: 10px;
margin-bottom: 10px;
}
.guide-num {
flex-shrink: 0;
width: 24px; height: 24px;
display: flex; align-items: center; justify-content: center;
border-radius: var(--r-xs);
background: var(--blue-bg);
border: 1px solid var(--blue-bd);
color: var(--blue);
font-family: var(--font-mono);
font-size: 0.78rem;
font-weight: 700;
}
.guide-title {
font-size: 0.98rem;
font-weight: 700;
color: var(--text);
}
.guide-go {
margin-left: auto;
background: var(--surface2);
border: 1px solid var(--border);
border-radius: var(--r-sm);
color: var(--text2);
font-size: 0.74rem;
font-weight: 600;
padding: 4px 12px;
cursor: pointer;
white-space: nowrap;
transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.guide-go:hover { border-color: var(--blue-bd); color: var(--blue); background: var(--blue-bg); }
.guide-go:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
.guide-best {
font-size: 0.78rem;
font-weight: 600;
color: var(--green);
margin-bottom: 8px;
}
.guide-desc {
font-size: 0.84rem;
line-height: 1.6;
color: var(--text2);
margin-bottom: 12px;
}
.guide-desc b { color: var(--text); font-weight: 600; }
.guide-sub {
font-size: 0.64rem;
font-weight: 700;
text-transform: uppercase;
letter-spacing: 0.1em;
color: var(--text3);
margin: 12px 0 6px;
}
.guide-ref {
width: 100%;
border-collapse: collapse;
font-size: 0.8rem;
}
.guide-ref td {
padding: 5px 8px;
border-bottom: 1px solid var(--border);
vertical-align: top;
}
.guide-ref tr:last-child td { border-bottom: none; }
.guide-ref td:first-child {
color: var(--text3);
font-weight: 600;
white-space: nowrap;
width: 96px;
}
.guide-ex {
list-style: none;
display: flex;
flex-direction: column;
gap: 6px;
}
.guide-ex li {
font-size: 0.82rem;
line-height: 1.5;
color: var(--text2);
padding-left: 14px;
position: relative;
}
.guide-ex li::before {
content: '›';
position: absolute;
left: 0;
color: var(--text3);
}
.guide-card code, .guide-mono {
font-family: var(--font-mono);
font-feature-settings: "tnum" 1, "zero" 1;
font-variant-numeric: tabular-nums slashed-zero;
}
.guide-card code {
font-size: 0.79rem;
color: var(--blue);
background: var(--blue-bg);
border: 1px solid var(--blue-bd);
border-radius: var(--r-xs);
padding: 1px 5px;
}
.kbd {
display: inline-block;
font-family: var(--font-mono);
font-size: 0.72rem;
color: var(--text);
background: var(--surface2);