:root {
  --bg: #f4f7f4;
  --panel: #fff;
  --border: #dde8d8;
  --text: #1a241a;
  --muted: #5a6b5a;
  --accent: #56963f;
  --accent-dark: #457a33;
  --radius: 10px;
  --sans: 'Segoe UI', system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
}

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1rem 3rem;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.topbar a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.banner {
  width: 100%;
  border-radius: 8px;
  display: block;
  margin-bottom: 0.5rem;
}

.app-title {
  font-size: 1.55rem;
  font-weight: 700;
  color: #2d6a2e;
  margin: 0.4rem 0 0.1rem;
}

.app-sub {
  color: var(--muted);
  font-size: 0.92rem;
  margin-bottom: 1rem;
}

.section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin-bottom: 1rem;
}

.section h2 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: #2d6a2e;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem 1rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem 1rem;
}

.field label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.55rem 0.65rem;
  font: inherit;
}

.field textarea { min-height: 78px; resize: vertical; }

.field-hint {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

.line-header {
  display: grid;
  grid-template-columns: 4fr 1fr 1.5fr 1.5fr auto;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid #eee;
  margin-bottom: 0.4rem;
}

.line-row {
  display: grid;
  grid-template-columns: 4fr 1fr 1.5fr 1.5fr auto;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.45rem;
}

.line-total {
  font-weight: 700;
  color: #2d6a2e;
  text-align: right;
  padding-right: 0.25rem;
}

.totals {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid #eee;
}

.metric {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
}

.metric-label { font-size: 0.75rem; color: var(--muted); }
.metric-value { font-size: 1.25rem; font-weight: 700; color: #2d6a2e; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.btn {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 8px;
  padding: 0.55rem 1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.btn:hover { border-color: var(--accent); color: var(--accent); }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-size: 1.05rem;
  padding: 0.65rem 1.5rem;
}

.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; }

.btn-primary:disabled { opacity: 0.55; cursor: not-allowed; }

.btn-sm { padding: 0.4rem 0.75rem; font-size: 0.85rem; }

.msg {
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  display: none;
}

.msg.ok { display: block; background: #e8f5e9; border: 1px solid #b7dfb9; color: #1b5e20; }
.msg.err { display: block; background: #fdecea; border: 1px solid #f5c6c6; color: #b71c1c; }

.check-row {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.check-row label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
}

@media (max-width: 800px) {
  .grid-2, .grid-3, .totals { grid-template-columns: 1fr; }
  .line-header { display: none; }
  .line-row {
    grid-template-columns: 1fr;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.65rem;
  }
}