:root{
  --bg:#0f1112;
  --card:#0f1314;
  --muted:#9aa4a6;
  --accent:#ff6b35;
  --accent-2:#ffd6c2;
  --good:#5bd18a;
  --warn:#ffd166;
  --bad:#ff6b6b;
  --glass: rgba(255,255,255,0.03);
  --text:#e6efef;
  font-size:16px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

*{box-sizing:border-box}
html,body,#app{height:100%}
body{
  margin:0;
  background:linear-gradient(180deg,var(--bg), #071011);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  display:flex;
  align-items:stretch;
  justify-content:center;
  padding:18px;
}

#app{
  width:100%;
  max-width:980px;
  height:calc(100vh - 36px);
  display:flex;
  flex-direction:column;
  gap:12px;
}

/* Header / hero */
.hero{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px;
  background:var(--glass);
  border-radius:12px;
}
.hero-left h1{
  margin:0;
  font-size:20px;
  letter-spacing:0.4px;
}
.tag{margin:6px 0 0 0;color:var(--accent-2);font-weight:600}
.blurb{margin:6px 0 0 0;color:var(--muted);font-size:13px;max-width:60%}

.hero-cta{display:flex;gap:8px;align-items:center}

.btn{
  min-height:44px;
  padding:10px 14px;
  border-radius:10px;
  border:0;
  cursor:pointer;
  font-weight:600;
}
.btn.primary{background:linear-gradient(90deg,var(--accent),#ff8b5b);color:#111}
.btn.secondary{background:transparent;border:1px solid rgba(255,255,255,0.06);color:var(--accent-2)}
.btn.ghost{background:transparent;border:0;color:var(--muted)}

/* Stage layout */
.stage{
  flex:1;
  display:grid;
  grid-template-columns:1fr 360px;
  gap:12px;
  align-items:stretch;
}

/* Editor */
.editor{
  background:linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
  border-radius:12px;
  padding:12px;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.editor-header{display:flex;gap:10px;align-items:center}
.editor-header input{
  flex:1;
  padding:8px 10px;
  border-radius:8px;
  border:1px solid rgba(255,255,255,0.04);
  background:transparent;
  color:var(--text);
}

/* textarea sized for mobile height (no scroll of page) */
textarea#input{
  resize:none;
  flex:1;
  min-height:0;
  padding:12px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,0.04);
  background:rgba(0,0,0,0.12);
  color:var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono", monospace;
  font-size:15px;
  line-height:1.4;
}

/* Panel */
.panel{
  padding:12px;
  background:linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
  border-radius:12px;
  display:flex;
  flex-direction:column;
  gap:10px;
  min-width:260px;
}

.status{color:var(--muted);font-size:13px}

/* metrics */
.metrics{display:flex;flex-direction:column;gap:10px}
.metric{display:flex;align-items:center;gap:10px}
.metric-title{width:110px;color:var(--muted);font-size:13px}
.meter{background:rgba(255,255,255,0.03);height:10px;border-radius:6px;flex:1;overflow:hidden}
.meter .fill{height:100%;background:var(--accent);width:0%;transition:width 350ms ease}
.metric-value{width:46px;text-align:right;font-weight:600;font-size:13px;color:var(--muted)}

.insights,.suggestions{background:rgba(255,255,255,0.02);padding:10px;border-radius:10px;flex:1;overflow:auto}
.list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.list .item{padding:8px;border-radius:8px;background:rgba(0,0,0,0.12)}
.muted{color:var(--muted)}

/* footer */
.footer{display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px}

/* Responsive single-column for very narrow screens */
@media (max-width:760px){
  .stage{grid-template-columns:1fr;grid-auto-rows:1fr}
  .blurb{max-width:100%}
  .hero{flex-direction:column;align-items:flex-start}
  .hero-cta{width:100%;justify-content:space-between}
  .panel{height:340px}
}