:root {
  --bg: #fafafa;
  --panel: #ffffff;
  --border: #1b1b1b;
  --soft-border: #cfcfcf;
  --muted: #666666;
  --text: #111111;
  --header-bg: #f2f2f2;
  --positive: #1d6a3a;
  --negative: #a22424;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-variant-numeric: tabular-nums;
}

button,
input,
select {
  font: inherit;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type="number"] {
  appearance: textfield;
  -moz-appearance: textfield;
}

.app {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: 16px;
  min-height: 100vh;
  padding: 16px;
}

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

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2 {
  font-size: 18px;
  margin-bottom: 8px;
}

.subtitle,
.status {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 12px 0 16px;
}

button {
  border: 1px solid var(--border);
  background: #f0f0f0;
  color: var(--text);
  cursor: pointer;
  padding: 6px 10px;
}

button:hover {
  background: #e7e7e7;
}

.field {
  display: grid;
  gap: 6px;
  margin-bottom: 16px;
}

.field-label {
  color: var(--muted);
  font-size: 12px;
}

.form-input,
.roll-input {
  width: 100%;
  border: 1px solid var(--border);
  background: #ffffff;
  padding: 6px;
}

.form-input.is-invalid,
.roll-input.is-invalid {
  background: #f3f3f3;
  border-style: dashed;
}

.roll-table {
  width: 100%;
  border-collapse: collapse;
}

.roll-table th,
.roll-table td {
  border: 1px solid var(--border);
  padding: 6px;
  text-align: left;
}

.roll-table th {
  background: var(--header-bg);
}

.roll-table td:first-child {
  width: 56px;
}

.summary {
  display: grid;
  gap: 10px;
  margin-top: 16px;
  margin-bottom: 16px;
}

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

.metric-primary {
  background: #f7f7f7;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.metric-wide {
  grid-column: 1 / -1;
}

.metric-label {
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 6px;
}

.metric-value {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}

.metric-value-small {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.2;
}

.metric-faces {
  font-size: 16px;
  line-height: 1.3;
}

.quote-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 10px;
}

.quote-field {
  display: grid;
  gap: 6px;
  border: 1px solid var(--soft-border);
  background: #ffffff;
  padding: 8px;
}

.quote-label {
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.check-formula,
.check-trade {
  font-size: 13px;
  line-height: 1.4;
}

.check-formula {
  color: var(--muted);
  margin-bottom: 6px;
}

.check-trade {
  font-weight: 700;
}

.check-note {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
  margin-top: 6px;
}

.check-rich {
  color: var(--negative);
}

.check-cheap {
  color: var(--positive);
}

.guide-card {
  border: 1px solid var(--border);
  padding: 12px;
  display: grid;
  gap: 10px;
}

.guide-header {
  display: grid;
  gap: 4px;
}

.guide-formula {
  font-size: 12px;
  color: var(--muted);
}

.guide-copy {
  font-size: 13px;
  line-height: 1.45;
}

@media (max-width: 760px) {
  .app {
    grid-template-columns: 1fr;
  }

  .panel {
    padding: 12px;
  }
}

@media (max-width: 520px) {
  .metric-grid {
    grid-template-columns: 1fr;
  }

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