computing-box/public/css/binary.css

:root{
  --bg: #1f2027;
  --panel2: rgba(255,255,255,.04);
  --text: #e8e8ee;
  --muted: #a9acb8;
  --accent: #33ff7a;
  --accent-dim: rgba(51,255,122,.15);
  --line: rgba(255,255,255,.12);
}

/* DSEG font (you already have these in public/fonts/) */
@font-face{
  font-family: "DSEG7ClassicRegular";
  src:
    url("/fonts/DSEG7Classic-Regular.woff") format("woff"),
    url("/fonts/DSEG7Classic-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

.wrap{
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

.topGrid{
  display:grid;
  grid-template-columns: 1fr 340px;
  gap: 28px;
  align-items:start;
}

.readout{
  background: transparent;
  text-align:center;
  padding: 10px 10px 0;
}

.label{
  letter-spacing: .18em;
  font-weight: 800;
  color: var(--muted);
  text-transform: uppercase;
  font-size: 14px;
  margin-top: 10px;
}

.num{
  font-family: "DSEG7ClassicRegular", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-weight: 400;
  color: var(--accent);
  text-shadow: 0 0 18px var(--accent-dim);
}

.denary{
  font-size: 84px;
  line-height: 1.0;
  margin: 6px 0 16px;
}

.binary{
  font-size: 62px;
  letter-spacing: .12em;
  line-height: 1.0;
  margin: 6px 0 18px;
}

.controls{
  margin-top: 10px;
  display:flex;
  gap: 12px;
  justify-content:center;
  flex-wrap:wrap;
}

.btn{
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  color: #fff;
  padding: 12px 14px;
  border-radius: 12px;
  font-weight: 800;
  cursor: pointer;
  min-width: 160px;
}
.btn:active{ transform: translateY(1px); }

.divider{
  margin-top: 26px;
  border-top: 1px solid var(--line);
}

/* Right panels */
.panelCol{
  display:flex;
  flex-direction:column;
  gap: 14px;
}

.card{
  background: var(--panel2);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 14px;
  padding: 14px;
}

.cardTitle{
  letter-spacing: .18em;
  font-weight: 900;
  color: var(--muted);
  text-transform: uppercase;
  font-size: 12px;
  margin: 0 0 10px;
}

.hint{
  color: var(--muted);
  font-size: 12px;
  margin-top: 8px;
  line-height: 1.35;
}

.toggleRow{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
}

.toggleLabel{
  color: var(--text);
  font-weight: 800;
  font-size: 14px;
}

/* Switch (re-used for mode + bits) */
.switch{
  position: relative;
  width: 56px;
  height: 34px;
  display:inline-block;
  flex: 0 0 auto;
}
.switch input{
  opacity:0;
  width:0;
  height:0;
}
.slider{
  position:absolute;
  inset:0;
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 999px;
  transition: .18s ease;
}
.slider::before{
  content:"";
  position:absolute;
  height: 28px;
  width: 28px;
  left: 3px;
  top: 2px;
  background: rgba(255,255,255,.92);
  border-radius: 50%;
  transition: .18s ease;
}
.switch input:checked + .slider{
  background: rgba(51,255,122,.20);
  border-color: rgba(51,255,122,.55);
}
.switch input:checked + .slider::before{
  transform: translateX(22px);
  background: var(--accent);
}

/* Bit width controls */
.bitWidthRow{
  display:grid;
  grid-template-columns: 44px 1fr 44px;
  gap: 10px;
  align-items:center;
}

.miniBtn{
  height: 44px;
  width: 44px;
  border-radius: 12px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  color: #fff;
  cursor:pointer;
  font-weight: 900;
  font-size: 18px;
}

.bitInputWrap{
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 12px;
  padding: 10px 12px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
}

.bitInputLabel{
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.bitInput{
  width: 86px;
  text-align:right;
  background: transparent;
  border: none;
  outline: none;
  color: var(--accent);
  font-family: "DSEG7ClassicRegular", ui-monospace, monospace;
  font-size: 28px;
}
.bitInput::-webkit-outer-spin-button,
.bitInput::-webkit-inner-spin-button{
  -webkit-appearance:none;
  margin:0;
}

/* ✅ Bits grid: wraps every 8 bits, NO horizontal scroll bar */
.bits{
  margin-top: 26px;
  padding-top: 22px;
  display:grid;
  grid-template-columns: repeat(8, minmax(90px, 1fr));
  gap: 18px;
  align-items:end;
  text-align:center;

  /* make absolutely sure we don't create a horizontal scrollbar */
  overflow-x: hidden;
}

/* Bit tile */
.bit{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap: 10px;
  padding: 8px 4px;
}

.bulb{
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: none;
  margin-bottom: 4px;
}
.bulb.on{
  background: #ffd86b;
  border-color: rgba(255,216,107,.7);
  box-shadow: 0 0 18px rgba(255,216,107,.6);
}

.bitVal{
  font-family: "DSEG7ClassicRegular", ui-monospace, monospace;
  font-size: 30px;
  color: var(--text);
  opacity: .95;
  line-height: 1;
  min-height: 34px;
}

/* Responsive */
@media (max-width: 980px){
  .topGrid{ grid-template-columns: 1fr; }
  .denary{ font-size: 72px; }
  .binary{ font-size: 52px; }
  .bits{ grid-template-columns: repeat(4, minmax(90px, 1fr)); }
}

@media (max-width: 520px){
  .denary{ font-size: 62px; }
  .binary{ font-size: 44px; }
  .btn{ min-width: 140px; }
}