:root {
  --primary: #006633;
  --secondary: #339966;
  --text: #10211a;
  --muted: #61716a;
  --border: #d9e2dd;
  --bg: #f5f8f6;
  --card: #ffffff;
  --success: #0f6b46;
  --warning: #b13f12;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}
body { padding: 24px; }

.page {
  max-width: 1360px;
  margin: 0 auto;
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(0, 2fr) minmax(320px, 0.95fr);
  align-items: start;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  box-shadow: 0 12px 36px rgba(16, 33, 26, 0.06);
}

.eyebrow {
  color: var(--secondary);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 12px;
  margin-bottom: 8px;
}

h1, h2 {
  margin: 0 0 8px 0;
  line-height: 1.2;
}

.intro {
  margin: 0 0 24px 0;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 18px;
  margin-bottom: 18px;
}
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field > span {
  font-weight: 700;
  font-size: 14px;
}

.field small, .checkbox-block small {
  color: var(--muted);
  line-height: 1.45;
}

input, select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 14px;
  font-size: 15px;
  color: var(--text);
  background: #fff;
  outline: none;
}

input:focus, select:focus {
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(51, 153, 102, 0.16);
}

.checkbox-block {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 18px;
  gap: 12px;
}

.choices {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin-top: 4px;
}

.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
}

.checkbox input {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

.actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.btn {
  appearance: none;
  border: 0;
  border-radius: 12px;
  padding: 14px 22px;
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  cursor: pointer;
  transition: transform 0.16s ease, opacity 0.16s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: 0.65; cursor: wait; transform: none; }

.btn-primary { background: var(--primary); }
.btn-secondary { background: var(--secondary); }

.message {
  min-height: 20px;
  margin: 14px 0 0 0;
  font-size: 14px;
  color: var(--warning);
}

.result-card {
  position: sticky;
  top: 20px;
}

.placeholder-box {
  margin-top: 18px;
  border: 1px dashed var(--border);
  border-radius: 14px;
  padding: 18px;
  background: #fbfcfb;
  color: var(--muted);
  line-height: 1.5;
}

.result-panel {
  margin-top: 18px;
  border-radius: 16px;
  padding: 18px;
  background: linear-gradient(180deg, rgba(0,102,51,0.06), rgba(51,153,102,0.05));
  border: 1px solid rgba(51,153,102,0.22);
}

.result-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid rgba(16,33,26,0.08);
}

.result-row.total {
  border-bottom: 0;
}

.result-row span {
  color: var(--muted);
  font-size: 14px;
}

.result-row strong {
  font-size: 28px;
  color: var(--success);
}

.hidden { display: none; }

@media (max-width: 980px) {
  .page { grid-template-columns: 1fr; }
  .result-card { position: static; }
  .grid.two, .grid.three { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  body { padding: 14px; }
  .card { padding: 18px; border-radius: 14px; }
  .result-row strong { font-size: 24px; }
}