*{box-sizing:border-box}
:root{
  --cream:#f7f0df;
  --cream2:#fffaf0;
  --navy:#102a43;
  --navy2:#173f63;
  --gold:#b88a28;
  --gold2:#d7b35a;
  --border:#c9ad67;
  --white:#ffffff;
  --muted:#526578;
}
html,body{margin:0;min-height:100%;font-family:Arial,Helvetica,sans-serif;background:var(--cream);color:var(--navy)}
body{display:flex;flex-direction:column}
.topbar{
  min-height:108px;display:flex;align-items:center;justify-content:space-between;
  padding:18px 28px;background:var(--cream2);border-bottom:4px solid var(--gold);
  box-shadow:0 2px 8px rgba(16,42,67,.10)
}
.brand{display:flex;align-items:center;gap:18px}
.brand-mark{
  font-weight:800;font-size:25px;letter-spacing:2px;color:var(--white);
  background:var(--navy);border:2px solid var(--gold);padding:11px 14px;border-radius:8px
}
.site-title{font-size:26px;font-weight:800;letter-spacing:1.2px}
.site-subtitle{font-size:14px;color:var(--muted);margin-top:4px}
.developer{text-align:right;font-size:13px;line-height:1.45;color:var(--muted)}
.developer strong{display:block;color:var(--navy);font-size:16px}
.developer span{display:block}

.page{display:grid;grid-template-columns:245px 1fr;flex:1;min-height:calc(100vh - 164px)}
.sidebar{
  background:var(--navy);padding:18px 14px;border-right:5px solid var(--gold);
  overflow:auto
}
.side-heading{
  color:var(--white);font-size:19px;font-weight:800;text-align:center;
  padding:12px 8px;border:1px solid var(--gold);border-radius:8px;margin-bottom:14px
}
.side-group{margin-bottom:18px}
.group-label{
  color:var(--gold2);font-size:12px;text-transform:uppercase;letter-spacing:1px;
  margin:10px 5px 7px;font-weight:800
}
.machine-btn{
  display:block;width:100%;padding:10px 11px;margin:6px 0;
  background:transparent;color:var(--white);border:1px solid rgba(215,179,90,.65);
  border-radius:6px;text-align:left;font-size:14px;cursor:pointer;transition:.18s
}
.machine-btn:hover,.machine-btn:focus{
  background:var(--gold);color:var(--navy);transform:translateX(2px);outline:none
}
.machine-btn.active{background:var(--gold);color:var(--navy);font-weight:700}
.back-btn{
  width:100%;padding:11px;margin-top:8px;background:var(--white);color:var(--navy);
  border:2px solid var(--gold);border-radius:7px;font-weight:700;cursor:pointer
}
.content{padding:28px 34px;max-width:1500px;width:100%;margin:auto}
.intro-card{
  background:var(--cream2);border:2px solid var(--border);border-radius:12px;
  padding:24px 28px;box-shadow:0 4px 12px rgba(16,42,67,.07)
}
.eyebrow{font-size:12px;letter-spacing:1.5px;font-weight:800;color:#87651e}
h1{margin:7px 0 8px;font-size:38px}
.intro-card p{margin:0;max-width:900px;line-height:1.6;color:var(--muted);font-size:16px}
.types-section{margin-top:28px}
.types-section h2{text-align:center;font-size:25px;margin:0 0 20px}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.category-card{
  position:relative;background:var(--white);border:2px solid var(--gold);
  border-radius:12px;padding:24px;min-height:245px;display:flex;flex-direction:column;
  box-shadow:0 4px 10px rgba(16,42,67,.08)
}
.category-number{font-size:13px;font-weight:800;color:#87651e;letter-spacing:1px}
.category-card h3{font-size:25px;margin:10px 0 8px}
.category-card p{color:var(--muted);line-height:1.55;margin:0 0 18px;flex:1}
.category-btn{
  align-self:flex-start;background:var(--navy);color:var(--white);
  border:2px solid var(--gold);border-radius:7px;padding:10px 15px;
  cursor:pointer;font-weight:700
}
.category-btn:hover{background:var(--gold);color:var(--navy)}
.status-panel{
  margin-top:22px;background:var(--cream2);border:1px solid var(--border);
  border-radius:10px;padding:15px 18px
}
.status-panel div{display:flex;align-items:center;gap:8px}
.status-dot{width:10px;height:10px;border-radius:50%;background:#b88a28;display:inline-block}
.status-panel p{margin:7px 0 0 18px;color:var(--muted);font-size:14px}
.selection-panel{
  margin-top:18px;text-align:center;border:1px dashed var(--border);
  border-radius:10px;padding:18px;background:rgba(255,250,240,.55)
}
.selection-panel h2{margin:0 0 5px;font-size:20px}
.selection-panel p{margin:0;color:var(--muted)}
footer{
  display:flex;justify-content:space-between;gap:20px;padding:10px 24px;
  background:var(--navy);color:var(--white);font-size:12px;border-top:3px solid var(--gold)
}
@media(max-width:900px){
  .page{grid-template-columns:1fr}
  .sidebar{border-right:0;border-bottom:5px solid var(--gold)}
  .category-grid{grid-template-columns:1fr}
  .topbar{align-items:flex-start;gap:15px}
}
@media(max-width:600px){
  .topbar{padding:14px;flex-direction:column}
  .developer{text-align:left}
  .content{padding:18px 14px}
  h1{font-size:30px}
  footer{flex-direction:column}
}