:root{
  --bg:#0b0d0a;
  --bg2:#10130f;
  --line:#1e2a1c;
  --phosphor:#9dff8f;
  --phosphor-dim:#4f7a48;
  --amber:#ffb454;
  --paper:#d8e8d2;
  --mono:'IBM Plex Mono','JetBrains Mono',ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:radial-gradient(ellipse at 20% -10%,#14201233 0%,transparent 60%),var(--bg);
  color:var(--paper);
  font-family:var(--mono);
  min-height:100vh;
  padding:32px 20px 80px;
}
.wrap{max-width:1040px;margin:0 auto}
header{margin-bottom:28px}
.eyebrow{
  color:var(--phosphor-dim);
  font-size:0.6875rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  margin:0 0 10px;
}
h1{
  font-size:clamp(1.75rem,5vw,2.75rem);
  margin:0 0 8px;
  font-weight:600;
  color:var(--phosphor);
  letter-spacing:-.01em;
  text-shadow:0 0 18px rgba(157,255,143,.25);
}
h1 .cursor{
  display:inline-block;
  width:.5ch;
  background:var(--phosphor);
  animation:blink 1.1s steps(1) infinite;
  margin-left:2px;
}
@keyframes blink{50%{opacity:0}}
p.sub{color:#8fa389;max-width:60ch;line-height:1.6;margin:0;font-size:0.875rem}

.grid{
  display:grid;
  grid-template-columns:300px 1fr;
  gap:20px;
  margin-top:28px;
}
@media(max-width:780px){.grid{grid-template-columns:1fr}}

.top-row{margin-top:28px}
.cards-row{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
  margin-top:20px;
  align-items:start;
}
@media(max-width:900px){.cards-row{grid-template-columns:1fr}}
.output-row{margin-top:20px}

.panel{
  background:var(--bg2);
  border:1px solid var(--line);
  border-radius:4px;
  padding:18px;
}
.panel+.panel{margin-top:16px}
.panel h2{
  font-size:0.6875rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--phosphor-dim);
  margin:0 0 14px;
  font-weight:600;
  display:flex;
  align-items:center;
  gap:8px;
}
.panel h2::before{content:'//';color:var(--line)}

.drop{
  border:1px dashed var(--phosphor-dim);
  border-radius:4px;
  padding:26px 14px;
  text-align:center;
  cursor:pointer;
  transition:border-color .15s,background .15s;
  color:#7f9179;
  font-size:0.7812rem;
  line-height:1.6;
}
.drop:hover,.drop.drag{
  border-color:var(--phosphor);
  background:#0f160e;
  color:var(--paper);
}
.drop strong{color:var(--paper);display:block;margin-bottom:4px;font-size:0.8125rem}
input[type=file]{display:none}
.thumb{
  margin-top:12px;
  width:100%;
  border-radius:3px;
  border:1px solid var(--line);
  display:none;
}

label.field{display:block;margin-bottom:16px}
label.field:last-child{margin-bottom:0}
.field-row{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  margin-bottom:6px;
}
.field-row span{font-size:0.75rem;color:#9fb098}
.field-row span .hint{
  display:block;
  font-size:0.625rem;
  color:var(--phosphor-dim);
  margin-top:2px;
}
.field-row b{color:var(--phosphor);font-weight:600;font-size:0.75rem}
input[type=range]{
  -webkit-appearance:none;
  width:100%;
  height:2px;
  background:var(--line);
  outline:none;
  margin:0;
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;
  width:12px;
  height:12px;
  background:var(--phosphor);
  border-radius:50%;
  cursor:pointer;
  box-shadow:0 0 8px rgba(157,255,143,.5);
}
input[type=range]::-moz-range-thumb{
  width:12px;
  height:12px;
  background:var(--phosphor);
  border:0;
  border-radius:50%;
  cursor:pointer;
}
select{
  width:100%;
  background:var(--bg);
  color:var(--paper);
  border:1px solid var(--line);
  border-radius:3px;
  padding:8px 10px;
  font-family:var(--mono);
  font-size:0.7812rem;
  cursor:pointer;
}
input.custom-charset{
  width:100%;
  margin-top:8px;
  background:var(--bg);
  color:var(--paper);
  border:1px solid var(--line);
  border-radius:3px;
  padding:8px 10px;
  font-family:var(--mono);
  font-size:0.7812rem;
}
input.custom-charset:focus{
  outline:none;
  border-color:var(--phosphor-dim);
}
.charset-preview{
  margin-top:8px;
  font-size:0.6875rem;
  color:var(--phosphor-dim);
  letter-spacing:.08em;
  word-break:break-all;
}
.toggle-row{display:flex;align-items:center;justify-content:space-between}
.switch{
  width:34px;
  height:18px;
  background:var(--line);
  border-radius:10px;
  position:relative;
  cursor:pointer;
  flex-shrink:0;
}
.switch::after{
  content:'';
  position:absolute;
  width:14px;
  height:14px;
  border-radius:50%;
  background:#7f9179;
  top:2px;
  left:2px;
  transition:transform .15s,background .15s;
}
.switch.on{background:#1c3018}
.switch.on::after{transform:translateX(16px);background:var(--phosphor)}

button.run{
  width:100%;
  margin-top:18px;
  padding:12px;
  border-radius:3px;
  border:1px solid var(--phosphor-dim);
  background:transparent;
  color:var(--phosphor);
  font-family:var(--mono);
  font-size:0.8125rem;
  letter-spacing:.06em;
  text-transform:uppercase;
  cursor:pointer;
  transition:all .15s;
}
button.run:hover:not(:disabled){
  background:var(--phosphor);
  color:#061006;
  box-shadow:0 0 20px rgba(157,255,143,.35);
}
button.run:disabled{opacity:.35;cursor:not-allowed}
button.run.stale{
  border-color:var(--amber);
  color:var(--amber);
  animation:staleGlow 1.6s ease-in-out infinite;
}
@keyframes staleGlow{
  50%{box-shadow:0 0 16px rgba(255,180,84,.35)}
}

.output-panel{min-height:420px;display:flex;flex-direction:column}
.output-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.output-head h2{margin:0}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.actions button{
  background:transparent;
  border:1px solid var(--line);
  color:#8fa389;
  font-family:var(--mono);
  font-size:0.6875rem;
  padding:6px 10px;
  border-radius:3px;
  cursor:pointer;
  letter-spacing:.04em;
}
.actions button:hover:not(:disabled){border-color:var(--phosphor-dim);color:var(--paper)}
.actions button:disabled{opacity:.3;cursor:not-allowed}

.canvas-wrap{
  flex:1;
  min-height:300px;
  background:#050705;
  border:1px solid var(--line);
  border-radius:3px;
  overflow:auto;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:14px;
  position:relative;
}
#asciiCanvas{
  display:block;
  cursor:crosshair;
  max-width:none;
  flex:none;
  image-rendering:auto;
}
.placeholder{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  width:100%;
  height:100%;
  padding:14px;
  margin:0;
  color:#445040;
  font-size:0.8125rem;
  text-align:center;
  line-height:1.7;
}
.placeholder .arrow{color:var(--phosphor-dim)}

.cost-strip{
  margin-top:14px;
  border:1px solid var(--line);
  border-radius:3px;
  padding:12px 14px;
  display:none;
}
.cost-strip.show{display:block}
.cost-strip .row{
  display:flex;
  justify-content:space-between;
  font-size:0.6875rem;
  color:#8fa389;
  margin-bottom:8px;
}
.cost-strip .row b{color:var(--amber)}
.cost-bar{height:4px;background:var(--line);border-radius:2px;overflow:hidden}
.cost-bar-fill{
  height:100%;
  width:0%;
  background:linear-gradient(90deg,var(--amber),var(--phosphor));
  transition:width .25s ease;
}
.cost-log{
  margin-top:10px;
  font-size:0.7188rem;
  color:var(--phosphor-dim);
  max-height:64px;
  overflow-y:auto;
  line-height:1.7;
}

.anim-params{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:8px 16px;
  margin-top:4px;
}
.anim-params label.field{margin-bottom:4px}
.anim-params .field-row{margin-bottom:2px}
.anim-params .field-row span,.anim-params .field-row b{font-size:0.7188rem}

.anim-badge{
  display:inline-block;
  font-size:0.625rem;
  letter-spacing:.06em;
  text-transform:uppercase;
  padding:2px 8px;
  border-radius:10px;
  border:1px solid var(--line);
  color:var(--phosphor-dim);
  margin-left:6px;
}
.anim-badge.active{
  border-color:var(--phosphor);
  color:var(--phosphor);
  box-shadow:0 0 12px rgba(157,255,143,.15);
}

footer{
  margin-top:40px;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:14px;
}
.bmc-btn{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:14px 30px;
  border-radius:999px;
  background:linear-gradient(135deg,#ffdd00,#ffb454);
  color:#1a1205;
  font-family:var(--mono);
  font-weight:700;
  font-size:0.9375rem;
  letter-spacing:.04em;
  text-decoration:none;
  box-shadow:0 0 24px rgba(255,196,0,.22);
  transition:transform .15s,box-shadow .15s;
}
.bmc-icon{
  display:block;
  width:20px;
  height:20px;
  flex-shrink:0;
}
.bmc-btn:hover{
  transform:translateY(-2px);
  box-shadow:0 0 34px rgba(255,196,0,.45);
}
.foot-note{
  color:#445040;
  font-size:0.6875rem;
  letter-spacing:.05em;
  text-align:center;
}

.skip-link{
  position:absolute;
  left:-9999px;
  top:0;
  background:#000;
  color:#0f0;
  padding:8px 14px;
  z-index:100;
}
.skip-link:focus{left:8px;top:8px}

.file-error{
  color:#ff6b6b;
  font-size:0.75rem;
  margin:8px 0 0;
}