decoder.css

:root{
  --void:#131016; --board:#1E1A23; --board-2:#262029; --well:#0D0B10;
  --bone:#F0E8DA; --dim:#9D948C; --dimmer:#6E6660;
  --brass:#D9A441; --brass-soft:#F0C877;
  --rule:rgba(240,232,218,.11);
  --bad:#E2554A;
  --r:14px;
  --peg:30px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:
    radial-gradient(1100px 620px at 12% -10%, #221C29 0%, rgba(34,28,41,0) 60%),
    radial-gradient(900px 500px at 100% 0%, #1B1A24 0%, rgba(27,26,36,0) 55%),
    var(--void);
  color:var(--bone);
  font-family:'IBM Plex Sans', ui-sans-serif, system-ui, sans-serif;
  font-size:15px; line-height:1.5;
  -webkit-font-smoothing:antialiased;
  /* --scale is set by the text-size buttons; zoom keeps the px-based board proportional. */
  zoom:var(--scale,1);
  min-height:calc(100vh / var(--scale,1));
}
h1,h2,h3{margin:0;font-family:'Fraunces',Georgia,serif;font-variation-settings:'SOFT' 45,'WONK' 1,'opsz' 100;font-weight:700;letter-spacing:-.015em}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
:focus-visible{outline:2px solid var(--brass);outline-offset:2px;border-radius:4px}

.wrap{max-width:1240px;margin:0 auto;padding:26px 22px 60px}

/* masthead */
.mast{display:flex;align-items:flex-end;justify-content:space-between;gap:22px;flex-wrap:wrap}
.mark{display:flex;align-items:baseline;gap:12px}
.mark h1{font-size:clamp(34px,5.4vw,52px);line-height:.92;font-weight:800;font-variation-settings:'SOFT' 60,'WONK' 1,'opsz' 144}
.mark .sub{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--dim)}
.spec{display:flex;gap:8px;flex-wrap:wrap}
.chip{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--dim);border:1px solid var(--rule);border-radius:999px;padding:5px 11px;background:rgba(255,255,255,.02)}
.chip b{color:var(--bone);font-weight:500}
.zoom{display:flex;align-items:center;gap:2px;border:1px solid var(--rule);border-radius:999px;
  padding:2px 3px;background:rgba(255,255,255,.02)}
.zoom b{font-family:'IBM Plex Mono',monospace;font-size:11px;font-weight:500;color:var(--dim);
  min-width:42px;text-align:center;font-variant-numeric:tabular-nums}
.zbtn{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;
  font-size:14px;line-height:1;color:var(--dim);transition:background .14s ease,color .14s ease}
.zbtn:hover:not(:disabled){background:rgba(240,232,218,.1);color:var(--bone)}
.zbtn:disabled{opacity:.3;cursor:not-allowed}
.lede{flex:1 0 100%;max-width:68ch;margin:14px 0 0;font-size:14px;line-height:1.6;color:var(--dim)}
.rail{display:flex;gap:3px;margin:16px 0 22px;height:5px}
.rail i{flex:1;border-radius:2px;opacity:.85}

/* console layout */
.console{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.02fr);gap:20px;align-items:start}
.panel{background:linear-gradient(180deg,var(--board-2),var(--board));border:1px solid var(--rule);border-radius:var(--r);
  box-shadow:0 22px 44px -26px #000, inset 0 1px 0 rgba(240,232,218,.05)}
.panel-hd{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 18px;border-bottom:1px solid var(--rule)}
.panel-hd h2{font-size:17px}
.panel-hd .note{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--dimmer);letter-spacing:.06em;text-align:right}
.panel-bd{padding:16px 18px}

/* pegs */
.peg{width:var(--peg);height:var(--peg);border-radius:50%;position:relative;flex:0 0 auto;
  display:grid;place-items:center;
  font-family:'IBM Plex Mono',monospace;font-size:11px;font-weight:600;
  background-image:radial-gradient(circle at 32% 26%, rgba(255,255,255,.6), rgba(255,255,255,0) 46%);
  box-shadow:inset 0 -3px 5px rgba(0,0,0,.42), inset 0 2px 3px rgba(255,255,255,.16), 0 2px 3px rgba(0,0,0,.55);
  transition:transform .12s ease}
.peg.on-light{color:rgba(0,0,0,.7)}
.peg.on-dark{color:rgba(255,255,255,.92)}
.hole{width:var(--peg);height:var(--peg);border-radius:50%;flex:0 0 auto;background:var(--well);
  display:grid;place-items:center;
  box-shadow:inset 0 3px 6px rgba(0,0,0,.9), inset 0 -1px 0 rgba(240,232,218,.07)}
.hole::after{content:'';display:block;width:6px;height:6px;border-radius:50%;background:rgba(240,232,218,.13)}
.slot{padding:0;border-radius:50%;display:grid;place-items:center}
button.slot:hover .hole{box-shadow:inset 0 3px 6px rgba(0,0,0,.9), 0 0 0 2px rgba(217,164,65,.4)}
.slot.sel .hole{box-shadow:inset 0 3px 6px rgba(0,0,0,.9), 0 0 0 2px var(--brass)}
.slot.sel .peg{box-shadow:inset 0 -3px 5px rgba(0,0,0,.42), inset 0 2px 3px rgba(255,255,255,.16), 0 0 0 2px var(--brass)}

/* guess rows */
.rows{display:flex;flex-direction:column;gap:9px}
.row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 12px;
  padding:8px;border-radius:11px;background:rgba(0,0,0,.22);border:1px solid rgba(240,232,218,.05)}
.row.draft{background:rgba(217,164,65,.045);border-color:rgba(217,164,65,.24)}
.row.solved{border-color:rgba(217,164,65,.55);background:rgba(217,164,65,.09)}
.row .idx{flex:0 0 22px;font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--dimmer);text-align:right}
.row .code{flex:1 1 auto;min-width:0}
.row .keys{margin-left:auto}
.code{display:flex;gap:5px;flex-wrap:wrap}
.keys{display:flex;align-items:center;gap:7px}
.keyin{display:flex;align-items:center;gap:6px;padding:4px 8px 4px 7px;border-radius:8px;cursor:text;
  background:var(--well);box-shadow:inset 0 2px 4px rgba(0,0,0,.8)}
.keyin:focus-within{box-shadow:inset 0 2px 4px rgba(0,0,0,.8), 0 0 0 2px var(--brass)}
.keyin .k2{width:11px;height:11px;border-radius:50%;flex:0 0 auto}
/* Beats the shared input[type=number] rule, which is more specific than a bare class. */
.keyin input.keynum{width:46px;padding:2px 0 2px 4px;text-align:center;
  background:none;border:none;border-radius:0;
  font-family:'IBM Plex Mono',monospace;font-size:15px;font-weight:500;color:var(--bone)}
.keyin input.keynum:focus{outline:none}
.keylbl{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--dimmer)}
.btn.save{padding:7px 13px;font-size:12.5px;white-space:nowrap}
.del{color:var(--dimmer);font-size:16px;line-height:1;padding:4px;border-radius:6px}
.del:hover{color:var(--bad);background:rgba(226,85,74,.1)}

/* entry */
.entry-hint{font-size:12.5px;color:var(--dim);margin:16px 0 8px}
.palette{display:grid;grid-template-columns:repeat(var(--pcols,15),minmax(0,1fr));gap:6px;padding:11px;border-radius:11px;
  background:rgba(0,0,0,.25);border:1px solid var(--rule)}
.palette .peg{cursor:pointer;width:100%;height:auto;aspect-ratio:1;font-size:10.5px}
.palette .peg:hover{transform:translateY(-2px)}
.entry-tools{display:flex;gap:10px;align-items:center;margin-top:12px;flex-wrap:wrap}
input[type=text],input[type=number]{
  font-family:'IBM Plex Mono',monospace;font-size:13px;color:var(--bone);
  background:var(--well);border:1px solid var(--rule);border-radius:9px;padding:9px 11px}
input[type=text]{flex:1;min-width:170px}
input::placeholder{color:var(--dimmer)}
.btn{border:1px solid var(--rule);border-radius:9px;padding:9px 15px;background:rgba(240,232,218,.05);
  font-size:13.5px;font-weight:500;transition:background .14s ease,border-color .14s ease}
.btn:hover:not(:disabled){background:rgba(240,232,218,.1)}
.btn.primary{background:var(--brass);color:#231803;border-color:var(--brass);font-weight:600}
.btn.primary:hover:not(:disabled){background:var(--brass-soft)}
.btn:disabled{opacity:.4;cursor:not-allowed}
.err{color:var(--bad);font-size:12.5px;margin-top:10px;min-height:1.2em}

/* suggestion */
.sugg{padding:14px;border-radius:11px;border:1px dashed rgba(217,164,65,.35);background:rgba(217,164,65,.05)}
.sugg-hd{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.sugg-btns{display:flex;gap:8px}
.sugg-lbl{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--brass)}
.sugg .code{margin:12px 0 10px}
.sugg .why{font-size:12.5px;color:var(--dim)}
.sugg.empty{border-color:var(--rule);background:rgba(0,0,0,.2)}
.sugg.empty .sugg-lbl{color:var(--dimmer)}

/* candidate field */
.field{display:grid;grid-template-columns:repeat(auto-fill,minmax(var(--candw,66px),1fr));gap:7px 9px;
  padding:15px;border-radius:11px;background:var(--well);box-shadow:inset 0 3px 10px rgba(0,0,0,.75);
  min-height:300px;max-height:clamp(300px,calc(56vh / var(--scale,1)),560px);overflow-y:auto;align-content:start;
  scrollbar-width:thin;scrollbar-color:rgba(240,232,218,.16) transparent}
.field::-webkit-scrollbar{width:7px}
.field::-webkit-scrollbar-thumb{background:rgba(240,232,218,.16);border-radius:4px}
.cand{display:flex;gap:2px;transition:opacity .3s ease, transform .3s ease}
.cand i{width:6px;height:6px;border-radius:50%;flex:0 0 auto;box-shadow:inset 0 -1px 1px rgba(0,0,0,.45)}
.cand.out{opacity:0;transform:scale(.4)}
.cand.in{animation:pop .34s ease both}
@keyframes pop{from{opacity:0;transform:translateY(5px) scale(.85)}to{opacity:1;transform:none}}
.field-empty{grid-column:1/-1;align-self:center;text-align:center;color:var(--dim);font-size:13.5px;padding:44px 20px}
.field-empty b{display:block;font-family:'Fraunces',Georgia,serif;font-size:19px;color:var(--bone);margin-bottom:7px;
  font-variation-settings:'SOFT' 45,'WONK' 1;font-weight:700}
.howto{grid-column:1/-1;align-self:center;justify-self:center;max-width:46ch;padding:30px 22px;color:var(--dim);font-size:13.5px}
.howto>b{display:block;font-family:'Fraunces',Georgia,serif;font-size:19px;color:var(--bone);
  font-variation-settings:'SOFT' 45,'WONK' 1;font-weight:700;margin-bottom:14px}
.howto ol{margin:0;padding:0;list-style:none;counter-reset:step}
.howto li{position:relative;padding:0 0 13px 30px;line-height:1.55;counter-increment:step}
.howto li:last-child{padding-bottom:0}
.howto li::before{content:counter(step);position:absolute;left:0;top:1px;width:19px;height:19px;
  border-radius:50%;display:grid;place-items:center;
  font-family:'IBM Plex Mono',monospace;font-size:10.5px;color:var(--brass);
  border:1px solid rgba(217,164,65,.4);background:rgba(217,164,65,.08)}
.howto li b{color:var(--bone);font-weight:500}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:1px;background:var(--rule);border-top:1px solid var(--rule);
  border-radius:0 0 var(--r) var(--r);overflow:hidden}
.stat{background:var(--board);padding:13px 16px}
.stat .k{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--dimmer)}
.stat .v{font-family:'IBM Plex Mono',monospace;font-size:17px;margin-top:3px;color:var(--bone)}
.stat .v small{font-size:11px;color:var(--dim)}
.bar{height:2px;background:rgba(217,164,65,.18);border-radius:2px;overflow:hidden;margin-top:10px;opacity:0;transition:opacity .2s}
.bar.on{opacity:1}
.bar i{display:block;height:100%;width:0;background:var(--brass);transition:width .1s linear}
.method{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--dim);margin-top:12px;line-height:1.55;min-height:1.5em}
.method b{color:var(--brass-soft);font-weight:500}

/* settings + footer */
.settings{display:flex;gap:16px;align-items:center;flex-wrap:wrap;padding:13px 18px;border-top:1px solid var(--rule);
  font-size:13px;color:var(--dim)}
.settings label{display:flex;gap:7px;align-items:center;cursor:pointer}
.settings input[type=number]{width:80px;padding:6px 8px}
.settings .range{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--dimmer);letter-spacing:.04em}
.settings input[type=checkbox]:disabled{opacity:.4}
.settings label:has(input:disabled){opacity:.55;cursor:not-allowed}
.settings #reset{margin-left:auto}
input[type=checkbox]{accent-color:var(--brass);width:15px;height:15px}
.won{margin-top:16px;padding:15px 16px;border-radius:11px;background:rgba(217,164,65,.12);border:1px solid rgba(217,164,65,.4)}
.won h3{font-size:19px;margin-bottom:4px}
.won p{margin:0;font-size:13px;color:var(--dim)}
.legend{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--dimmer);margin:18px 0 12px;
  display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.legend span{display:flex;gap:6px;align-items:center}
.legend .k2{width:10px;height:10px;border-radius:50%;flex:0 0 auto}
.legend b{color:var(--bone);font-weight:500}
.k2.black{background:#17131d;box-shadow:inset 0 0 0 1.5px rgba(240,232,218,.5), 0 1px 2px rgba(0,0,0,.6)}
.k2.white{background:var(--bone);box-shadow:0 0 0 1px rgba(0,0,0,.45), inset 0 -1px 1px rgba(0,0,0,.28)}
footer{margin-top:26px;font-size:12px;color:var(--dimmer);line-height:1.6;max-width:74ch}

/* Breakpoints run off data-w, which the script derives from viewport width / text scale,
   because zoom leaves the viewport-based media query untouched. */
:root[data-w="md"],:root[data-w="sm"]{--peg:28px}
:root[data-w="md"] .console,:root[data-w="sm"] .console{grid-template-columns:1fr}
:root[data-w="md"] .row,:root[data-w="sm"] .row{gap:8px 10px}
:root[data-w="sm"]{--peg:26px}
:root[data-w="sm"] .wrap{padding:20px 14px 44px}
:root[data-w="sm"] .row .idx{text-align:left}
:root[data-w="sm"] .field{grid-template-columns:repeat(auto-fill,minmax(calc(var(--candw,66px) - 8px),1fr))}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}