/* thread-calculator.css
   Styles for the thread calculator.
   CSS namespace: .thr-*
   Uses Material theme CSS variables for consistent theming.
*/

/* ── Family illustration ─────────────────────────────────────────────────────── */

.thr-family-img {
  display: block;
  max-height: 130px;
  width: auto;
  margin: 0.6rem auto 1.2rem;
  opacity: 0.80;
  /* Invert black-on-white drawings for the dark slate theme */
  filter: invert(1) brightness(0.80);
}

/* ── Section blocks ─────────────────────────────────────────────────────────── */

.thr-section-block {
  margin: 1.4rem 0 0.6rem;
}

.thr-section-header {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--md-default-fg-color--light);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
  padding-bottom: 0.3rem;
  margin-bottom: 0.8rem;
}

/* ── Input grids ─────────────────────────────────────────────────────────────── */

.thr-grid-1 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem 1.2rem;
  margin-bottom: 0.5rem;
}

.thr-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem 1.5rem;
  margin-bottom: 0.5rem;
}

/* ── Field groups (label + input) ───────────────────────────────────────────── */

.thr-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 0.3rem;
}

.thr-group label {
  font-size: 0.78rem;
  color: var(--md-default-fg-color--light);
  margin-bottom: 0.2rem;
}

.thr-group input[type="number"],
.thr-group select {
  padding: 0.38rem 0.55rem;
  font-size: 0.92rem;
  font-family: var(--md-code-font-family);
  background: var(--md-code-bg-color);
  color: var(--md-default-fg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 3px;
  max-width: 280px;
  box-sizing: border-box;
}

.thr-group input[type="number"]:focus,
.thr-group select:focus {
  border-color: var(--md-primary-fg-color);
  outline: none;
}

.thr-group input[type="number"]:invalid,
.thr-group input[type="number"]:out-of-range {
  border-color: #e53935;
}

.thr-group select {
  cursor: pointer;
}

/* ── Results table ───────────────────────────────────────────────────────────── */

.thr-table-wrapper {
  overflow-x: auto;
  margin-top: 0.4rem;
}

.thr-results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
  min-width: 380px;
}

.thr-results-table th {
  background: var(--md-code-bg-color);
  font-weight: 600;
  font-size: 0.76rem;
  text-align: center;
  border: 1px solid var(--md-default-fg-color--lightest);
  padding: 0.35rem 0.65rem;
  white-space: nowrap;
}

.thr-results-table th.thr-th-label {
  text-align: left;
  min-width: 180px;
}

.thr-results-table td {
  border: 1px solid var(--md-default-fg-color--lightest);
  padding: 0.32rem 0.65rem;
  font-family: var(--md-code-font-family);
  text-align: right;
  white-space: nowrap;
}

.thr-results-table td.thr-td-label {
  font-family: var(--md-text-font-family, inherit);
  text-align: left;
  font-size: 0.82rem;
  color: var(--md-default-fg-color--light);
}

.thr-results-table td.thr-mid {
  color: var(--md-accent-fg-color);
  font-weight: 500;
}

.thr-results-table td.thr-td-unit {
  font-family: var(--md-text-font-family, inherit);
  font-size: 0.76rem;
  color: var(--md-default-fg-color--light);
  text-align: center;
}

/* Zebra stripes */
.thr-results-table tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--md-code-bg-color) 60%, transparent 40%);
}

/* ── Warning and error banners ───────────────────────────────────────────────── */

.thr-messages {
  margin-top: 0.75rem;
}

.thr-warning {
  background: color-mix(in srgb, var(--md-code-bg-color) 80%, #f5a623 15%);
  border-left: 3px solid #f5a623;
  padding: 0.45rem 0.85rem;
  font-size: 0.83rem;
  border-radius: 2px;
  margin-bottom: 0.4rem;
}

.thr-error {
  background: color-mix(in srgb, var(--md-code-bg-color) 80%, #e53935 15%);
  border-left: 3px solid #e53935;
  padding: 0.45rem 0.85rem;
  font-size: 0.83rem;
  border-radius: 2px;
  margin-bottom: 0.4rem;
}

/* ── Responsive ──────────────────────────────────────────────────────────────── */

@media (max-width: 760px) {
  .thr-grid-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .thr-results-table {
    font-size: 0.76rem;
  }

  .thr-results-table td,
  .thr-results-table th {
    padding: 0.25rem 0.4rem;
  }

  .thr-group input[type="number"],
  .thr-group select {
    max-width: 100%;
  }
}