/* PTCreative palette:
   #000 (black) | #fff (white) | #00d4d0 (turquoise)
*/

:root{
  --bg: #000;
  --fg: #fff;
  --accent: #00d4d0;
  --muted: rgba(255,255,255,.72);
  --muted2: rgba(255,255,255,.5);
  --card: rgba(255,255,255,.06);
  --card2: rgba(255,255,255,.09);
  --border: rgba(255,255,255,.14);
  --shadow: 0 12px 40px rgba(0,0,0,.45);
  --radius: 18px;
  --radius2: 14px;
  --max: 1100px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: #000;
  color: var(--fg);
}

.header{
  max-width: var(--max);
  margin: 28px auto 12px;
  padding: 0 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 14px;
}
.brand{
  display:flex;
  align-items:center;
  gap:14px;
}
.logo{
  width: 120px;
  height: auto;
  display:block;
  filter: drop-shadow(0 6px 18px rgba(0,0,0,.55));
}
.brand-text .kicker{
  color: var(--accent);
  letter-spacing: .12em;
  font-size: 12px;
  text-transform: uppercase;
}
.brand-text h1{
  margin: 4px 0 0;
  font-size: 20px;
  font-weight: 700;
}
.badge{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  padding: 10px 12px;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: .08em;
  font-size: 12px;
  color: var(--accent);
}

.container{
  max-width: var(--max);
  margin: 0 auto 40px;
  padding: 0 18px 32px;
  display:grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.card{
  background: linear-gradient(180deg, var(--card), rgba(255,255,255,.03));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 16px;
  box-shadow: var(--shadow);
}
.card h2{
  margin: 0 0 6px;
  font-size: 16px;
}
.muted{ color: var(--muted); }
p{ margin: 0 0 10px; line-height: 1.45; }

.grid-3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.choice{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding: 12px 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  border-radius: var(--radius2);
  cursor:pointer;
  user-select:none;
  transition: transform .12s ease, border-color .12s ease, background .12s ease;
}
.choice:hover{
  transform: translateY(-1px);
  border-color: rgba(0,212,208,.5);
  background: rgba(0,212,208,.08);
}
.choice input{ accent-color: var(--accent); }
.choice-title{ font-weight: 800; letter-spacing: .02em; }
.choice-sub{ color: var(--muted2); font-size: 12px; }

.checklist{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.item{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  border-radius: var(--radius2);
  padding: 10px 12px;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 12px;
}
.item .meta{
  display:flex;
  flex-direction:column;
  gap: 3px;
}
.item .title{ font-weight: 750; }
.item .sub{ font-size: 12px; color: var(--muted2); }
.item input{ accent-color: var(--accent); margin-top: 2px; transform: scale(1.05); }

.output{
  border-color: rgba(0,212,208,.28);
  background: linear-gradient(180deg, rgba(0,212,208,.10), rgba(255,255,255,.02));
}
.output-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
}
.actions{
  display:flex;
  gap: 10px;
}
.btn{
  border: 1px solid rgba(0,212,208,.45);
  background: rgba(0,212,208,.12);
  color: var(--fg);
  padding: 10px 12px;
  border-radius: 999px;
  cursor:pointer;
  font-weight: 750;
  letter-spacing: .02em;
  transition: transform .12s ease, background .12s ease;
}
.btn:hover{
  transform: translateY(-1px);
  background: rgba(0,212,208,.18);
}
.btn:active{ transform: translateY(0); }
.btn-ghost{
  border-color: var(--border);
  background: rgba(255,255,255,.04);
}
.btn-ghost:hover{
  background: rgba(255,255,255,.06);
}

.stats{
  margin-top: 12px;
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}
.stats.two-col{
    display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.stat{
  border: 1px solid var(--border);
  background: rgba(0,0,0,.18);
  border-radius: var(--radius2);
  padding: 12px;
}
.stat-label{
  font-size: 12px;
  color: var(--muted2);
  margin-bottom: 6px;
}
.stat-value{
  font-size: 18px;
  font-weight: 900;
  letter-spacing: .01em;
}

.summary{
  margin-top: 12px;
  border: 1px dashed rgba(0,212,208,.45);
  background: rgba(0,0,0,.16);
  border-radius: var(--radius2);
  padding: 12px;
  color: var(--muted);
  line-height: 1.45;
}

.formula{
  margin-top: 12px;
}
.formula summary{
  cursor:pointer;
  color: var(--accent);
  font-weight: 750;
}
.formula-box{
  margin-top: 10px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,.18);
  border-radius: var(--radius2);
  padding: 12px;
  overflow:auto;
}
code{ color: rgba(255,255,255,.88); }

.footer{
  max-width: var(--max);
  margin: 4px auto 0;
  padding: 10px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
  color: rgba(255,255,255,.65);
  font-size: 12px;
}

@media (max-width: 860px){
  .grid-3{ grid-template-columns: 1fr; }
  .checklist{ grid-template-columns: 1fr; }
  .stats{ grid-template-columns: 1fr 1fr; }
  .badge{ display:none; }
  .logo{ width: 96px; }
}