:root{
  --bg:#0f172a;
  --panel:#111827;
  --muted:#94a3b8;
  --text:#e5e7eb;
  --accent:#22c55e;
  --accent-2:#06b6d4;
  --warn:#f59e0b;
  --err:#ef4444;
}

*{box-sizing:border-box}
html,body{height:100%}

body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial;
  background: radial-gradient(1200px 700px at 20% -10%, #1e293b 0, #0b1020 50%, #05060d 100%);
  color:var(--text);
}

a{color:var(--accent)}
.hidden{display:none}

.container{
  display:grid;
  grid-template-columns:1.2fr 0.8fr;
  gap:18px;
  padding:18px;
  max-width:1200px;
  margin:0 auto;
}

header{
  grid-column:1/-1;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}

/* Brand / Logo */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
}

.brand-logo{
  width:54px;
  height:54px;
  border-radius:999px;
  object-fit:cover;
  border:1px solid #334155;
  box-shadow: 0 10px 25px rgba(0,0,0,.25);
}

.brand-text h1{
  font-size:22px;
  margin:0;
  line-height:1.1;
}

.badge{
  font-size:12px;
  padding:4px 8px;
  border:1px solid #334155;
  border-radius:999px;
  color:#cbd5e1;
}

.panel{
  background:linear-gradient(180deg, rgba(17,24,39,.7), rgba(2,6,23,.7));
  border:1px solid #1f2937;
  border-radius:14px;
  padding:16px;
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
}

.note{font-size:12px; color:var(--muted)}
.h2{margin:0 0 10px 0}
.h3{margin:0 0 8px 0}

.req{
  color: #fca5a5;
  font-weight:700;
  margin-left:4px;
}

.steps{
  display:flex;
  gap:8px;
  margin-bottom:12px;
  flex-wrap:wrap;
}

.step{
  padding:6px 10px;
  border-radius:999px;
  border:1px solid #334155;
  color:#94a3b8;
  font-size:12px;
}

.step.active{
  border-color:var(--accent);
  color:#dcfce7;
  background: rgba(34,197,94,.08);
}

.field{margin:10px 0}

label{
  display:block;
  font-size:13px;
  color:#cbd5e1;
  margin-bottom:6px;
}

input[type="text"], input[type="number"], select, textarea{
  width:100%;
  padding:10px 12px;
  border-radius:10px;
  background:#0a1020;
  color:#e5e7eb;
  border:1px solid #1f2937;
  outline:none;
}

input:focus, select:focus, textarea:focus{border-color:var(--accent)}

/* NEW: invalid styling */
.invalid{
  border-color: var(--err) !important;
  box-shadow: 0 0 0 3px rgba(239,68,68,.15);
}

.error-inline{
  font-size:12px;
  color: var(--err);
  margin-top:6px;
}

.error-block{
  font-size:12px;
  color: var(--err);
  margin: 8px 0 0;
  padding:10px 12px;
  border:1px solid rgba(239,68,68,.45);
  border-radius:10px;
  background: rgba(239,68,68,.08);
}

.ok{color:#86efac; font-size:12px; margin-left:8px}
.error{color:var(--err); font-size:12px; margin-left:8px}

.dogs{display:flex; flex-direction:column; gap:12px}

.dog-card{
  background:linear-gradient(180deg, rgba(11,18,34,.9), rgba(2,8,23,.9));
  border:1px solid #1f2937;
  border-radius:12px;
  padding:12px;
}

.dog-top{display:flex; align-items:center; gap:10px; justify-content:space-between}
.dog-title{display:flex; align-items:center; gap:10px}
.dog-emoji{font-size:22px}

.remove-btn{
  background:transparent;
  color:#94a3b8;
  border:1px solid #334155;
  border-radius:8px;
  padding:6px 8px;
  cursor:pointer;
}
.remove-btn:hover{border-color:#475569; color:#e2e8f0}

.sizes{display:grid; grid-template-columns:repeat(4, 1fr); gap:8px}

.size{
  border:1px solid #273449;
  border-radius:12px;
  padding:10px;
  text-align:center;
  cursor:pointer;
  position:relative;
}
.size input{position:absolute; inset:0; opacity:0; cursor:pointer}
.size .ic{display:block; font-size:22px; margin-bottom:4px}
.size small{color:#94a3b8}
.size.active{border-color:var(--accent); box-shadow:0 0 0 3px rgba(34,197,94,.15)}

.substitutions{display:flex; flex-wrap:wrap; gap:8px}

.chip{
  border:1px solid #334155;
  border-radius:999px;
  padding:6px 10px;
  font-size:12px;
  color:#cbd5e1;
  cursor:pointer;
}
.chip.active{
  border-color:var(--accent-2);
  background:rgba(6,182,212,.08);
  color:#cffafe;
}

.actions{display:flex; gap:10px; margin-top:10px}
.actions.wrap{flex-wrap:wrap}

.btn{
  border:none;
  border-radius:10px;
  padding:10px 14px;
  cursor:pointer;
  font-weight:600;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  justify-content:center;
}

.btn.primary{
  background:linear-gradient(90deg, #22c55e, #06b6d4);
  color:#052e2b;
}

.btn.secondary{
  background:#0a1020;
  color:#e5e7eb;
  border:1px solid #1f2937;
}

.btn.link{
  background:transparent;
  color:#93c5fd;
}

.sidebar{position:sticky; top:16px; height:fit-content}

.sidebar-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  margin-bottom:8px;
}

.sidebar-title{font-weight:700}

.price-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:6px 0;
  border-bottom:1px dashed #233048;
}
.price-row:last-child{border-bottom:none}

.mt{margin-top:8px}
.total{font-size:22px}
.mb8{margin-bottom:8px}

/* Responsive */
@media (max-width: 900px){
  .container{grid-template-columns:1fr}
  .sidebar{position:static}
  .sizes{grid-template-columns:repeat(2, 1fr)}
}