:root {
  color-scheme: light;
  --bg: #f5f7f9;
  --panel: #ffffff;
  --text: #18212b;
  --muted: #5f6b7a;
  --line: #d8dee6;
  --accent: #146c63;
  --accent-dark: #0d4e48;
  --warn: #a54d00;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
}

button,
input,
select {
  font: inherit;
}

.app-shell {
  width: min(1500px, 100%);
  margin: 0 auto;
  padding: 20px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.topbar h1 {
  margin: 0;
  font-size: 28px;
  line-height: 1.15;
}

.topbar p {
  margin: 6px 0 0;
  color: var(--muted);
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

button {
  border: 1px solid var(--accent-dark);
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  min-height: 40px;
  padding: 0 14px;
  cursor: pointer;
}

button:hover {
  background: var(--accent-dark);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(320px, 430px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.panel h2 {
  margin: 0 0 14px;
  font-size: 18px;
}

.config-panel {
  position: sticky;
  top: 16px;
}

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

.section-label {
  grid-column: 1 / -1;
  margin-top: 4px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.section-label:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

label span {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 13px;
}

input,
select {
  width: 100%;
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 8px;
  background: #fff;
  color: var(--text);
}

input[readonly] {
  border-style: dashed;
  background: #eef2f5;
  color: var(--muted);
  cursor: default;
}

.toggle-grid {
  display: grid;
  gap: 10px;
  margin-top: 14px;
  color: var(--text);
}

.form-note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
}

.toggle-grid label {
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.3;
}

.toggle-grid input {
  width: 16px;
  min-height: 16px;
}

.results {
  display: grid;
  gap: 16px;
}

.guide-panel {
  border-color: #c9d8d5;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.guide-section {
  min-width: 0;
}

.guide-section h3 {
  margin: 0 0 8px;
  font-size: 14px;
}

.guide-section dl {
  margin: 0;
}

.guide-section dt {
  margin-top: 8px;
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
}

.guide-section dd {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.metric {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  min-height: 88px;
}

.metric .label {
  color: var(--muted);
  font-size: 13px;
}

.metric .value {
  margin-top: 8px;
  font-size: 24px;
  font-weight: 700;
}

.metric.danger .value {
  color: var(--danger);
}

.metric.warn .value {
  color: var(--warn);
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 9px 8px;
  text-align: right;
  white-space: nowrap;
}

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

th {
  color: var(--muted);
  font-weight: 700;
}

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

@media (max-width: 980px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .config-panel {
    position: static;
  }

  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .guide-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .app-shell {
    padding: 14px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .actions,
  .actions button {
    width: 100%;
  }

  .field-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }
}