:root {
  --ink: #0b1220;
  --muted: #64748b;
  --border: #e2e8f0;
  --bg: #f4f6f8;
  --card: #fff;
  --accent: #e11d48;
  --accent-dark: #9f1239;
  --green: #0f766e;
  --warn-bg: #fff7ed;
  --warn-border: #fdba74;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "DM Sans", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.45;
}
a { color: var(--accent-dark); }
.top {
  background: linear-gradient(135deg, #1c1917, #292524 40%, #9f1239);
  color: #fff;
  padding: 0.85rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
  justify-content: space-between;
}
.top a { color: #fff; text-decoration: none; }
.brand a { font-weight: 800; font-size: 1.15rem; letter-spacing: 0.02em; }
.chip {
  margin-left: 0.5rem;
  font-size: 0.65rem;
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 999px;
  padding: 0.1rem 0.45rem;
  opacity: 0.9;
}
nav { display: flex; gap: 0.85rem; font-size: 0.9rem; flex-wrap: wrap; }
nav a.on { font-weight: 700; border-bottom: 2px solid #fda4af; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 1.25rem 1rem 3rem; }
.foot { text-align: center; color: var(--muted); font-size: 0.75rem; padding: 1.5rem; }
h1 { margin: 0 0 0.25rem; font-size: 1.55rem; }
h2 { margin: 1.25rem 0 0.5rem; font-size: 1.1rem; }
.sub, .muted { color: var(--muted); }
.grid-2 {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1rem;
}
@media (max-width: 900px) {
  .grid-2 { grid-template-columns: 1fr; }
}
.panel, .card, .result {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}
.stack { display: flex; flex-direction: column; gap: 0.65rem; }
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}
.form-grid .full { grid-column: 1 / -1; }
@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
}
label { display: flex; flex-direction: column; gap: 0.25rem; font-size: 0.82rem; font-weight: 600; }
input, select, textarea {
  font: inherit;
  font-weight: 400;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid #fda4af;
  border-color: var(--accent);
}
.btn {
  font: inherit;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  padding: 0.5rem 0.85rem;
  cursor: pointer;
  font-weight: 600;
}
.btn.primary {
  background: var(--accent);
  border-color: var(--accent-dark);
  color: #fff;
}
.btn.primary:hover { background: var(--accent-dark); }
.btn.ghost { background: transparent; }
.btn.small { font-size: 0.8rem; padding: 0.35rem 0.6rem; }
.line-card {
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 0.75rem;
  margin-bottom: 0.65rem;
  background: #fafafa;
}
.line-card h3 { margin: 0 0 0.5rem; font-size: 0.95rem; }
.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.6rem;
  margin: 0.75rem 0;
}
.metric {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
}
.metric .label { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.metric .value { font-size: 1.25rem; font-weight: 800; color: var(--ink); }
.metric .value.good { color: var(--green); }
.metric .value.sell { color: var(--accent-dark); }
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
table.data th, table.data td {
  text-align: left;
  padding: 0.45rem 0.4rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
table.data th { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.warn {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: 8px;
  padding: 0.65rem 0.8rem;
  font-size: 0.85rem;
  margin: 0.5rem 0;
}
.warn li { margin: 0.2rem 0; }
.sample-banner {
  background: #fff1f2;
  border: 1px solid #fecdd3;
  color: #9f1239;
  border-radius: 8px;
  padding: 0.65rem 0.85rem;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}
.hint { font-size: 0.8rem; color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem; }
.tier-hint { font-size: 0.78rem; color: var(--green); margin-top: 0.25rem; }
.breakdown { font-size: 0.88rem; }
.breakdown dt { font-weight: 700; margin-top: 0.35rem; }
.breakdown dd { margin: 0; color: var(--muted); }
pre.cogs-json {
  background: #0f172a;
  color: #e2e8f0;
  padding: 1rem;
  border-radius: 10px;
  overflow: auto;
  font-size: 0.75rem;
  max-height: 70vh;
}
.guide h2 { color: var(--accent-dark); }
.guide ul { padding-left: 1.2rem; }
.guide li { margin: 0.3rem 0; }
.row-between { display: flex; justify-content: space-between; gap: 1rem; align-items: flex-start; flex-wrap: wrap; }