:root{
  --bg:            #1B222C;
  --panel:         #232B36;
  --panel-raised:  #2A3340;
  --hairline:      rgba(184,146,90,0.25);
  --brass:         #B8925A;
  --brass-bright:  #D8B27F;
  --paper:         #EDEAE3;
  --muted:         #8B94A3;
  --strong:        #6FA97C;
  --medium:        #D6A24A;
  --ember:         #C1665A;
  --focus:         #D8B27F;
  --radius:        3px;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}

body{
  background:
    radial-gradient(circle at 15% -10%, rgba(184,146,90,0.06), transparent 45%),
    var(--bg);
  color:var(--paper);
  font-family:-apple-system,"Segoe UI",Roboto,system-ui,sans-serif;
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:32px 16px;
  line-height:1.5;
}

.sheet{width:100%;max-width:480px;}

.eyebrow{
  font-family:ui-monospace,"SF Mono","Cascadia Code","Roboto Mono",monospace;
  font-size:11px;
  letter-spacing:0.24em;
  text-transform:uppercase;
  color:var(--brass);
  margin:0 0 6px 2px;
  display:flex;
  align-items:center;
  gap:8px;
}
.eyebrow::before{
  content:"";
  width:6px;height:6px;
  background:var(--strong);
  border-radius:50%;
  box-shadow:0 0 6px var(--strong);
}
.eyebrow.danger::before{background:var(--ember);box-shadow:0 0 6px var(--ember);}

h1{font-size:28px;font-weight:800;letter-spacing:-0.01em;margin:0 0 22px 0;}

.panel{
  background:var(--panel);
  border:1px solid var(--hairline);
  border-radius:6px;
  padding:26px;
  position:relative;
}
.rivets .tl,.rivets .tr,.rivets .bl,.rivets .br{
  position:absolute;width:6px;height:6px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%, var(--brass-bright), var(--brass) 70%, #7a5c37 100%);
}
.rivets .tl{top:10px;left:10px;} .rivets .tr{top:10px;right:10px;}
.rivets .bl{bottom:10px;left:10px;} .rivets .br{bottom:10px;right:10px;}

textarea{
  width:100%;
  min-height:140px;
  resize:vertical;
  background:#12161C;
  border:1px solid var(--hairline);
  border-radius:var(--radius);
  color:var(--paper);
  font-family:ui-monospace,"SF Mono","Cascadia Code","Roboto Mono",monospace;
  font-size:14px;
  padding:14px;
  outline:none;
}
textarea:focus{border-color:var(--brass);}

.char-count{
  text-align:right;
  font-size:11px;
  color:var(--muted);
  font-family:ui-monospace,"SF Mono","Cascadia Code","Roboto Mono",monospace;
  margin:6px 2px 18px;
}
.char-count.over{color:var(--ember);}

.field{margin-bottom:18px;}
.field-label{
  display:block;
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:0.12em;
  color:var(--muted);
  margin-bottom:10px;
}

.ttl-group{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:6px;
}
.ttl-opt{
  text-align:center;
  padding:9px 4px;
  background:var(--panel-raised);
  border:1px solid var(--hairline);
  border-radius:var(--radius);
  font-size:12px;
  cursor:pointer;
  color:var(--muted);
  transition:border-color .15s ease,color .15s ease;
}
.ttl-opt:hover{border-color:var(--brass);}
.ttl-opt.active{border-color:var(--brass-bright);color:var(--brass-bright);background:rgba(216,178,127,0.08);}
.ttl-opt input{display:none;}

button.primary{
  width:100%;
  padding:15px;
  background:linear-gradient(180deg, var(--brass-bright), var(--brass));
  color:#1B222C;
  border:none;
  border-radius:var(--radius);
  font-size:13px;
  font-weight:800;
  text-transform:uppercase;
  letter-spacing:0.14em;
  cursor:pointer;
  transition:transform .08s ease, filter .15s ease;
}
button.primary:hover{filter:brightness(1.08);}
button.primary:active{transform:scale(0.98);}
button.primary:disabled{opacity:0.5;cursor:not-allowed;filter:none;}

button.ghost{
  width:100%;
  padding:12px;
  background:transparent;
  color:var(--muted);
  border:1px solid var(--hairline);
  border-radius:var(--radius);
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:0.1em;
  cursor:pointer;
  margin-top:10px;
  transition:border-color .15s ease,color .15s ease;
}
button.ghost:hover{border-color:var(--brass);color:var(--brass-bright);}

.readout{
  background:#12161C;
  border:1px solid var(--hairline);
  border-radius:var(--radius);
  padding:16px;
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
}
#linkOut{
  flex:1;
  font-family:ui-monospace,"SF Mono","Cascadia Code","Roboto Mono",monospace;
  font-size:12.5px;
  color:var(--brass-bright);
  background:transparent;
  border:none;
  outline:none;
  width:100%;
  min-width:0;
}

.icon-btn{
  background:var(--panel-raised);
  border:1px solid var(--hairline);
  color:var(--muted);
  width:38px;height:38px;
  border-radius:var(--radius);
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
  flex-shrink:0;
  transition:color .15s ease, border-color .15s ease, transform .1s ease;
}
.icon-btn:hover{color:var(--brass-bright);border-color:var(--brass);}
.icon-btn:active{transform:scale(0.92);}
.icon-btn svg{width:17px;height:17px;}

.banner{
  border:1px solid var(--hairline);
  border-left:3px solid var(--brass);
  background:rgba(184,146,90,0.06);
  border-radius:var(--radius);
  padding:12px 14px;
  font-size:12.5px;
  color:var(--muted);
  margin-bottom:18px;
}
.banner b{color:var(--brass-bright);}
.banner.warn{border-left-color:var(--ember);}

#qrPanel{
  display:none;
  justify-content:center;
  padding:20px;
  background:#12161C;
  border:1px solid var(--hairline);
  border-radius:var(--radius);
  margin-bottom:14px;
}
#qrPanel.show{display:flex;}
#qrPanel svg{width:200px;height:200px;}

.state-box{
  text-align:center;
  padding:40px 20px;
}
.state-icon{margin-bottom:18px;opacity:0.85;}
.state-title{font-size:17px;font-weight:700;margin-bottom:8px;}
.state-detail{font-size:13px;color:var(--muted);}

.secret-box{
  background:#12161C;
  border:1px solid var(--hairline);
  border-radius:var(--radius);
  padding:16px;
  font-family:ui-monospace,"SF Mono","Cascadia Code","Roboto Mono",monospace;
  font-size:14px;
  white-space:pre-wrap;
  word-break:break-word;
  color:var(--paper);
  margin-bottom:14px;
  max-height:340px;
  overflow-y:auto;
}

.ember-field{position:relative;height:0;}
.ember{
  position:absolute;
  bottom:0;
  border-radius:50%;
  background:var(--brass-bright);
  opacity:0;
  pointer-events:none;
  animation:rise 1.8s ease-out forwards;
}
@keyframes rise{
  0%{opacity:0.9;transform:translateY(0) scale(1);}
  100%{opacity:0;transform:translateY(-70px) scale(0.3);}
}

.foot{
  margin-top:16px;
  text-align:center;
  font-size:11.5px;
  color:var(--muted);
}

.spinner{
  width:28px;height:28px;
  border:2px solid var(--hairline);
  border-top-color:var(--brass-bright);
  border-radius:50%;
  margin:0 auto 18px;
  animation:spin 0.8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg);}}

.toast{
  position:fixed;
  bottom:24px;
  left:50%;
  transform:translateX(-50%) translateY(12px);
  background:var(--panel-raised);
  border:1px solid var(--brass);
  color:var(--brass-bright);
  padding:10px 18px;
  border-radius:var(--radius);
  font-size:13px;
  font-family:ui-monospace,"SF Mono","Cascadia Code","Roboto Mono",monospace;
  opacity:0;
  pointer-events:none;
  transition:opacity .2s ease, transform .2s ease;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

:focus-visible{outline:2px solid var(--focus);outline-offset:2px;}

@media (prefers-reduced-motion: reduce){
  .ember, .spinner, button.primary{animation:none !important;transition:none !important;}
}

@media (max-width:400px){
  .panel{padding:20px;}
  .ttl-group{grid-template-columns:repeat(3,1fr);}
}