:root {
  --bg: #f4f2ed;
  --card: #fffdfa;
  --ink: #1f1f1a;
  --muted: #5d5a52;
  --accent: #005f73;
  --accent-2: #0a9396;
  --danger: #b00020;
  --line: #d8d2c7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Trebuchet MS", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, #e3e8da 0%, var(--bg) 48%), var(--bg);
}

.app {
  max-width: 1560px;
  margin: 28px auto;
  padding: 0 16px 30px;
}

h1,
h2 {
  margin-top: 0;
}

h1 {
  letter-spacing: 0.2px;
}

header p {
  color: var(--muted);
  margin-bottom: 24px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 14px;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.05);
}

.grid {
  display: grid;
  gap: 12px;
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.grid.three {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

label {
  font-weight: 600;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 10px;
  font-size: 14px;
}

input[readonly] {
  background: #f3f6ec;
}

select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 10px;
  font-size: 14px;
  background: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  overflow-x: auto;
}

#resultsSection {
  overflow-x: auto;
}

#resultsSection table {
  min-width: 1500px;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 9px 8px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

th:first-child,
td:first-child {
  text-align: left;
}

button {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
}

button.primary {
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff;
  border: 0;
  font-weight: 700;
}

.row-between {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.warning {
  color: var(--danger);
  min-height: 20px;
  margin: 8px 0 0;
}

.import-row {
  margin-top: 14px;
}

.file-input {
  min-width: 280px;
}

.status {
  min-height: 20px;
  margin: 8px 0 0;
  color: #1d6b2c;
}

.status.error {
  color: var(--danger);
}

.status.locked {
  color: #6b4f00;
  font-weight: 700;
}

.period-card {
  padding-bottom: 12px;
}

.lock-row {
  margin-top: 10px;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.period-label {
  font-weight: 600;
  margin-bottom: 6px;
}

.quarter-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.quarter-btn {
  min-width: 70px;
}

.quarter-btn.active {
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff;
  border-color: transparent;
}

.metric {
  background: #f8f7f3;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
}

.metric .k {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.metric .v {
  font-size: 22px;
  font-weight: 700;
  margin-top: 4px;
}

tr:last-child td {
  border-bottom: 0;
}

.total-row td {
  font-weight: 700;
  background: #f3f6ec;
}

.supply-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 10px;
}

.supply-diagrams {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.supply-diagram-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f8f7f3;
  padding: 10px;
}

.supply-diagram-card h3 {
  margin: 0 0 8px;
}

.supply-svg {
  width: 100%;
  min-height: 260px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.supply-column {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f8f7f3;
  padding: 10px;
}

.supply-column h3 {
  margin: 0 0 8px;
}

.supply-node-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 80px;
}

.supply-node {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 8px;
  font-size: 13px;
}

.supply-node .node-sub {
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

.supply-tables {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}

@media (max-width: 740px) {
  th,
  td {
    font-size: 12px;
    padding: 7px 6px;
  }

  .metric .v {
    font-size: 18px;
  }

  .supply-grid,
  .supply-diagrams,
  .supply-tables {
    grid-template-columns: 1fr;
  }
}