:root {
  --bg: #f4f6f8;
  --card: #fff;
  --ink: #152535;
  --muted: #5c6d7e;
  --line: #dde4ea;
  --brand: #0a5f7a;
  --brand-light: #e6f3f7;
  --sc: #1a6b4a;
  --lc: #b45309;
  --hol: #6b4fa0;
  --radius: 8px;
  font-family: "Segoe UI", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.45;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); }

header, header.site-nav {
  background: var(--brand);
  color: #fff;
  padding: 1rem 1.5rem;
}
header h1 { margin: 0; font-size: 1.25rem; font-weight: 600; }
.tag { margin: 0.25rem 0 0; opacity: 0.9; font-size: 0.85rem; }

.site-nav { padding: 0.85rem 1.5rem; }
.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.site-nav nav { display: flex; gap: 0.5rem; }
.site-nav nav a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
}
.site-nav nav a:hover { background: rgba(255,255,255,0.15); color: #fff; }
.site-nav nav a.active { background: #fff; color: var(--brand); }

.layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 1rem;
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem;
  align-items: start;
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
}

.sidebar { display: flex; flex-direction: column; gap: 0.75rem; }
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
}
.panel h2 {
  margin: 0 0 0.6rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-weight: 600;
}

label { display: block; margin-bottom: 0.5rem; font-size: 0.8rem; font-weight: 500; }
input, select {
  width: 100%;
  margin-top: 0.2rem;
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  font: inherit;
}
.help { font-size: 0.75rem; color: var(--muted); margin: 0 0 0.5rem; }
.check { display: flex; align-items: center; gap: 0.4rem; font-size: 0.8rem; margin: 0.5rem 0; }
.check input { width: auto; margin: 0; }

.btn {
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  font-size: 0.85rem;
}
.btn:hover { background: #f0f3f6; }
.btn.primary { background: var(--brand); color: #fff; border-color: var(--brand); }
.btn.primary:hover { background: #084d63; }
.btn.block { width: 100%; margin-top: 0.25rem; }
.copy-row { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.saved-msg { font-size: 0.75rem; color: var(--sc); margin-left: 0.35rem; }

.rate-table { font-size: 0.72rem; max-height: 220px; overflow-y: auto; }
.rate-table.compact { max-height: 120px; }
.rate-row {
  display: grid;
  grid-template-columns: 1fr 56px;
  gap: 0.25rem;
  align-items: center;
  margin-bottom: 0.2rem;
}
.rate-row span { color: var(--muted); line-height: 1.2; }
.rate-row input { margin: 0; padding: 0.25rem; font-size: 0.8rem; }

.main { display: flex; flex-direction: column; gap: 0.75rem; min-width: 0; }

.summary-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.9rem;
}
.summary-bar strong { color: var(--brand); font-size: 1.1rem; }
.summary-bar .muted { color: var(--muted); font-size: 0.75rem; display: block; }

.invoice-doc {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  min-height: 320px;
}
.invoice-doc .placeholder { color: var(--muted); }

.inv-head { margin-bottom: 1.25rem; border-bottom: 2px solid var(--brand); padding-bottom: 0.75rem; }
.inv-head h2 { margin: 0; font-size: 1.15rem; }
.inv-meta { font-size: 0.85rem; color: var(--muted); margin-top: 0.35rem; }

.billing-section { margin: 1.25rem 0; }
.billing-section > h3 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  padding: 0.35rem 0.6rem;
  border-radius: 4px;
  color: #fff;
}
.billing-section.sc > h3 { background: var(--sc); }
.billing-section.lc > h3 { background: var(--lc); }
.billing-section.holiday > h3 { background: var(--hol); }
.billing-section.notes > h3 { background: #4a5568; }

.day-block { margin: 0.75rem 0 0.75rem 0.5rem; }
.day-block h4 {
  margin: 0 0 0.35rem;
  font-size: 0.85rem;
  color: var(--ink);
  border-left: 3px solid var(--line);
  padding-left: 0.5rem;
}

table.inv {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  margin-bottom: 0.5rem;
}
table.inv th, table.inv td {
  border: 1px solid var(--line);
  padding: 0.35rem 0.5rem;
  text-align: left;
}
table.inv th { background: #f8fafb; font-weight: 600; }
table.inv td.num, table.inv th.num { text-align: right; }
table.inv tr.subtotal td { font-weight: 600; background: var(--brand-light); }

.grand-total {
  text-align: right;
  font-size: 1.2rem;
  font-weight: 700;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 2px solid var(--brand);
}

.noteworthy-panel { font-size: 0.82rem; }
.noteworthy-panel ul { margin: 0.25rem 0; padding-left: 1.2rem; }
.noteworthy-panel .excluded { color: #9b2c2c; }

footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.75rem;
  color: var(--muted);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
}