/* ******************************************************************************
HVAC Lens calculator layout.
Link this file on any tool page that offers the calculator, and put class
calc-ui on the page root. Air Flow is the first page (app/tools/aircalc-calc.htm).
Colors use the site variables so html.dark picks them up from stylesdark.css.

Face, top to bottom: screen, calculator keys, quantity keys, number pad.
The first key row is six columns: AF, REF, ELEC, SIZE, IMP, METR.
*********************************************************************************** */

.calc-ui .calc-source {
  display: none !important;
}

.calc-ui .calc-display {
  margin: 0 0 0.5rem;
  padding: 0.45rem 0.7rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--input-bg, var(--surface));
}

.calc-ui .calc-display .label {
  margin: 0 0 0.1rem;
  text-align: right;
  color: var(--text-light);
}

.calc-ui .calc-display input {
  font-size: 1.75rem !important;
  text-align: right;
  font-variant-numeric: tabular-nums;
  background: transparent;
  color: var(--text);
  border: 0;
}

.calc-ui .calc-modes {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.45rem;
  margin: 0 0 0.65rem;
}

.calc-ui .calc-modes a,
.calc-ui .calc-modes button,
.calc-ui .calc-ops button,
.calc-ui .calc-row {
  border: 1px solid var(--border);
  border-bottom-color: transparent;
  border-radius: 8px;
  background: linear-gradient(180deg, var(--surface-raised, var(--surface)) 0%, var(--surface) 100%);
  color: var(--text);
  box-shadow:
    0 3px 0 color-mix(in srgb, var(--text) 32%, var(--border)),
    0 5px 8px rgba(15, 23, 42, 0.16);
  transform: translateY(0);
  transition: transform 0.08s ease, box-shadow 0.08s ease;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.calc-ui .calc-modes a:active,
.calc-ui .calc-modes button:active,
.calc-ui .calc-row:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--text) 32%, var(--border));
}

.calc-ui .calc-modes a,
.calc-ui .calc-modes button,
.calc-ui .calc-ops button {
  min-height: 44px;
  min-width: 0;
  padding: 0.35rem 0.15rem;
  font: inherit;
  font-size: 0.85rem;
}

.calc-ui .calc-modes a,
.calc-ui .calc-modes button {
  font-weight: 700;
  white-space: nowrap;
}

.calc-ui .calc-modes button[data-ref-select] {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1.05;
  white-space: normal;
}

.calc-ui .calc-modes button[data-ref-select] .calc-key-value {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  justify-content: center;
  gap: 0.2em;
  font-size: 0.72rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  min-height: 0.9em;
  white-space: nowrap;
}

.calc-ui .calc-modes button[data-ref-select] .calc-key-value .calc-unit {
  font-size: 0.68rem;
  font-weight: 400;
  margin-left: 0.15em;
}

.calc-ui .calc-modes a {
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  text-align: center;
  text-decoration: none;
}

.calc-ui .calc-ops {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 0.65rem 0 0;
}

#air-primary-actions.ref-calc-key-actions {
  display: grid !important;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.45rem;
  margin: 0.65rem 0 0;
  width: 100%;
}

#air-primary-actions.ref-calc-key-actions #save-log-btn {
  grid-column: 5;
}

#air-primary-actions.ref-calc-key-actions #clear-step-btn,
#air-primary-actions.ref-calc-key-actions #clear-all-btn,
#air-primary-actions.ref-calc-key-actions #save-log-btn,
#air-primary-actions.ref-calc-key-actions #clear-step-btn:hover,
#air-primary-actions.ref-calc-key-actions #clear-all-btn:hover,
#air-primary-actions.ref-calc-key-actions #save-log-btn:hover:not(:disabled) {
  min-height: 44px;
  padding: 0.35rem 0.15rem;
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1.1;
  white-space: nowrap;
  background: linear-gradient(180deg, var(--surface-raised, var(--surface)) 0%, var(--surface) 100%) !important;
  color: var(--text) !important;
  border: 1px solid var(--border);
  border-bottom-color: transparent;
  border-radius: 8px;
  box-shadow:
    0 3px 0 color-mix(in srgb, var(--text) 32%, var(--border)),
    0 5px 8px rgba(15, 23, 42, 0.16) !important;
  transform: none;
}

#air-primary-actions.ref-calc-key-actions .ref-calc-compact-btn:active:not(:disabled) {
  transform: translateY(2px);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--text) 32%, var(--border)) !important;
}

#air-primary-actions.ref-calc-key-actions #save-log-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.calc-ui .calc-ops button {
  height: 54px;
  min-height: 44px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1;
  border-bottom-color: var(--border);
  box-shadow: none;
  transform: none;
}

.calc-ui .calc-ops button:active {
  background: color-mix(in srgb, var(--text) 14%, var(--surface));
  box-shadow: none;
  transform: none;
}

.calc-ui .calc-ops button[data-calc-key="equals"] {
  background: #0d9488;
  color: #fff;
  border-color: #0d9488;
  box-shadow: none;
}

.calc-ui .calc-ops button[data-calc-key="equals"]:active {
  background: #0f766e;
  color: #fff;
  box-shadow: none;
  transform: none;
}

.calc-ui .calc-modes a.active {
  background: var(--header-bg);
  color: #fff;
  border-color: var(--header-bg);
  box-shadow:
    0 3px 0 color-mix(in srgb, var(--header-bg) 55%, #000),
    0 5px 8px rgba(15, 23, 42, 0.18);
}

.calc-ui .calc-modes a.active:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--header-bg) 55%, #000);
}

.calc-ui .calc-modes button[data-ref-select].active {
  background: var(--info-bg);
  color: var(--text);
  border-color: var(--primary-blue);
  box-shadow:
    0 3px 0 var(--primary-blue),
    0 5px 8px rgba(15, 23, 42, 0.14);
}

.calc-ui .calc-modes .calc-unit-hold.active {
  background: linear-gradient(180deg, var(--surface-raised, var(--surface)) 0%, var(--surface) 100%);
  color: var(--text);
  border-color: var(--primary-blue);
  box-shadow:
    0 3px 0 var(--primary-blue),
    0 5px 8px rgba(15, 23, 42, 0.14);
}

.calc-ui .calc-modes button[data-ref-select].active:active,
.calc-ui .calc-modes .calc-unit-hold.active:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--primary-blue);
}

.calc-ui .calc-modes .calc-unit-hold {
  grid-column: 6;
  white-space: normal;
  line-height: 1.05;
}

.calc-ui .calc-modes .calc-ref-hold {
  white-space: normal;
  line-height: 1.05;
  font-size: 0.72rem;
}

.calc-ui #ref-loading {
  margin: 0.75rem 0 0;
}

.calc-ui .calc-modes[aria-label="Calculators"] > a,
.calc-ui .calc-modes[aria-label="Calculators"] > button {
  min-height: 22px;
  padding: 0.18rem 0.08rem;
  font-size: 0.72rem;
  line-height: 1.05;
  white-space: nowrap;
}

.calc-ui button.calc-row[data-calc-field="out-sv"] > span:first-child,
.calc-ui button.calc-row[data-calc-field="out-vd"] > span:first-child {
  white-space: nowrap;
}

.calc-ui button.calc-row[data-calc-field="out-sv"] > span:first-child .calc-unit,
.calc-ui button.calc-row[data-calc-field="out-vd"] > span:first-child .calc-unit {
  font-size: 0.68rem;
  font-weight: 400;
  white-space: nowrap;
}

.calc-ui .calc-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.45rem;
  margin: 0 0 0.85rem;
}

.calc-ui .calc-row {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: stretch;
  gap: 0.12rem;
  width: 100%;
  box-sizing: border-box;
  min-width: 0;
  min-height: 52px;
  padding: 0.35rem 0.3rem;
  font: inherit;
  text-align: right;
}

.calc-ui .calc-row span:first-child {
  font-size: 0.68rem;
  line-height: 1.15;
  font-weight: 700;
  color: var(--text-light);
  white-space: normal;
}

.calc-ui button.calc-row.calc-short span:first-child {
  font-weight: 700;
}

.calc-ui button.calc-row.calc-center {
  text-align: center;
  align-items: center;
}

.calc-ui .calc-unit {
  font-size: 0.68rem;
}

.calc-ui .calc-row span:last-child {
  font-size: 0.85rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.calc-ui .calc-row .calc-value-line {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  justify-content: center;
  gap: 0.2em;
  white-space: nowrap;
  overflow: visible;
  text-overflow: clip;
}

.calc-ui .calc-row .calc-num {
  font-size: 0.85rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.calc-ui button.calc-row[data-calc-output] .calc-num {
  font-weight: 400;
}

.calc-ui button.calc-row span.calc-unit,
.calc-ui button.calc-row[data-calc-output] span.calc-unit {
  font-size: 0.68rem;
  font-weight: 400;
  white-space: normal;
  overflow: visible;
  text-overflow: clip;
}

.calc-ui button.calc-row.active {
  background: var(--info-bg);
  border-color: var(--primary-blue);
  box-shadow:
    0 3px 0 var(--primary-blue),
    0 5px 8px rgba(15, 23, 42, 0.14);
}

.calc-ui button.calc-row.active:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--primary-blue);
}

.calc-ui button.calc-row.active span:first-child {
  color: var(--text);
}

.calc-ui button.calc-row[data-calc-output],
.calc-ui button.calc-row[data-calc-output].active {
  background: #e5e7eb;
  color: var(--text);
}

.calc-ui button.calc-row[data-calc-missing],
.calc-ui button.calc-row[data-calc-missing].active,
.calc-ui button.calc-row.calc-populated,
.calc-ui button.calc-row.calc-populated.active {
  background: #fecaca;
  color: #7f1d1d;
}

.calc-ui button.calc-row[data-calc-output] span:last-child:not(:first-child):not(.calc-unit) {
  font-weight: 400;
  font-size: 0.85rem;
}

html.dark .calc-ui button.calc-row[data-calc-output],
html.dark .calc-ui button.calc-row[data-calc-output].active {
  background: #3a4556;
  color: var(--text);
}

html.dark .calc-ui button.calc-row[data-calc-missing],
html.dark .calc-ui button.calc-row[data-calc-missing].active,
html.dark .calc-ui button.calc-row.calc-populated,
html.dark .calc-ui button.calc-row.calc-populated.active {
  background: #7f1d1d;
  color: #fee2e2;
}

.calc-ui button.calc-row.calc-populated span.calc-unit,
html.dark .calc-ui button.calc-row.calc-populated span.calc-unit {
  color: var(--text);
}

.calc-ui button.calc-row.calc-white:not(.active),
html.dark .calc-ui button.calc-row.calc-white:not(.active) {
  background: #fff;
  color: #0f172a;
}

.calc-ui button.calc-row.calc-white:not(.active) span:first-child,
html.dark .calc-ui button.calc-row.calc-white:not(.active) span:first-child {
  color: #475569;
}

.calc-ui button.calc-row.calc-white.active,
html.dark .calc-ui button.calc-row.calc-white.active {
  background: var(--info-bg);
  color: var(--text);
  border-color: var(--primary-blue);
  box-shadow:
    0 3px 0 var(--primary-blue),
    0 5px 8px rgba(15, 23, 42, 0.14);
}

.calc-ui .calc-modes button.calc-white:not(.active),
html.dark .calc-ui .calc-modes button.calc-white:not(.active) {
  background: #fff;
}

/* A calculated mode key also gets the grey output fill. Selected stays with the Tons key. */
.calc-ui .calc-modes button[data-ref-select].active,
html.dark .calc-ui .calc-modes button[data-ref-select].active {
  background: var(--info-bg);
  color: var(--text);
  border-color: var(--primary-blue);
  box-shadow:
    0 3px 0 var(--primary-blue),
    0 5px 8px rgba(15, 23, 42, 0.14);
}

.calc-ui .calc-modes button[data-ref-select].active span:first-child,
html.dark .calc-ui .calc-modes button[data-ref-select].active span:first-child {
  color: var(--text);
}

.calc-ui .calc-modes button.calc-row[data-ref-select][data-calc-output] .calc-key-value {
  font-size: 0.72rem;
  font-weight: 700;
}

.calc-ui .calc-display .sign-input {
  align-items: center;
}

.calc-ui .calc-display .sign-input > .label {
  flex: 0 1 42%;
  max-width: 42%;
  margin: 0;
  text-align: left;
  font-size: 0.85rem;
  line-height: 1.15;
  overflow-wrap: anywhere;
}

.calc-ui .calc-display .sign-input:has(#ref-calc-entry),
.calc-ui .calc-display .sign-input:has(#air-calc-entry) {
  gap: 0;
}

.calc-ui .calc-display .sign-input > #ref-calc-caption,
.calc-ui .calc-display .sign-input > #air-calc-caption {
  flex: 0 0 15%;
  max-width: 15%;
}

.calc-ui .calc-display .sign-input > #ref-calc-entry,
.calc-ui .calc-display .sign-input > #air-calc-entry {
  flex: 1 1 85%;
  width: auto !important;
  min-width: 0;
}

.ref-pop[hidden] {
  display: none !important;
}

.ref-pop {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(15, 23, 42, 0.45);
}

.ref-pop-card {
  width: min(420px, 100%);
  max-height: min(80vh, 640px);
  overflow: auto;
  padding: 16px;
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
}

.ref-pop-card h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.ref-pop-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ref-pop-list button,
.ref-pop-close {
  font: inherit;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-raised, var(--surface));
  color: var(--text);
  padding: 10px 12px;
  cursor: pointer;
}

.ref-pop-list button.active {
  background: var(--info-bg);
  border-color: var(--primary-blue);
}

.ref-pop-close {
  margin-top: 12px;
}

.ref-pt-frame {
  min-height: 180px;
  border: 1px dashed var(--border);
  border-radius: 8px;
}

@media (prefers-reduced-motion: reduce) {
  .calc-ui .calc-modes a,
  .calc-ui .calc-modes button,
  .calc-ui .calc-ops button,
  .calc-ui .calc-row,
  .calc-ui .calc-modes a:active,
  .calc-ui .calc-modes button:active,
  .calc-ui .calc-ops button:active,
  .calc-ui .calc-row:active,
  .calc-ui .calc-modes a.active:active,
  .calc-ui .calc-modes button.active:active,
  .calc-ui button.calc-row.active:active {
    transition: none;
    transform: none;
  }
}

.calc-ui #air-calc-fan .airflow-toggle-row {
  margin-bottom: 0.65rem;
}

.calc-ui #air-calc-fan .section-dropdown {
  margin-bottom: 0.75rem;
}

.pt-card {
  position: relative;
}

.pt-card h2 {
  margin: -16px -16px 12px;
  padding: 12px 2.75rem;
  text-align: center;
  border-radius: 12px 12px 0 0;
}

.pt-card .ref-pop-close {
  display: block;
  margin: 12px auto 0;
}

.pt-x {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 1.75rem;
  height: 1.75rem;
  padding: 0;
  font: inherit;
  line-height: 1;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.pt-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
}

.pt-controls button,
.pt-controls select {
  box-sizing: border-box;
  min-height: 32px;
  font: inherit;
  line-height: 1.2;
  color: var(--text);
  background: var(--surface-raised, var(--surface));
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
}

.pt-controls #pt-toggle {
  /* same look as the calculator face keys (.calc-modes button), kept at the smaller 32px height */
  font-weight: 700;
  white-space: nowrap;
  border-bottom-color: transparent;
  border-radius: 8px;
  background: linear-gradient(180deg, var(--surface-raised, var(--surface)) 0%, var(--surface) 100%);
  box-shadow:
    0 3px 0 color-mix(in srgb, var(--text) 32%, var(--border)),
    0 5px 8px rgba(15, 23, 42, 0.16);
  transform: translateY(0);
  transition: transform 0.08s ease, box-shadow 0.08s ease;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  padding: 4px 12px;
}

.pt-controls #pt-toggle:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--text) 32%, var(--border));
}

@media (prefers-reduced-motion: reduce) {
  .pt-controls #pt-toggle,
  .pt-controls #pt-toggle:active {
    transition: none;
    transform: none;
  }
}
.pt-scroll-wrap {
  position: relative;
  --pt-row-h: 2rem;
  --pt-head-h: 2rem;
}

.pt-scroll {
  position: relative;
  max-height: 50vh;
  overflow-y: auto;
  scroll-snap-type: y proximity;
  scroll-padding-top: var(--pt-head-h);
}

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

.pt-table th,
.pt-table td {
  box-sizing: border-box;
  height: var(--pt-row-h);
  text-align: left;
  padding: 0 8px;
  line-height: 1.2;
}

.pt-table th {
  position: sticky;
  top: 0;
  background: var(--surface);
}

.pt-table tbody tr {
  scroll-snap-align: center;
}

.pt-table tbody tr:nth-child(even) td {
  background: #f0f0f0;
}

html.dark .pt-table tbody tr:nth-child(even) td {
  background: var(--surface-raised);
}

.pt-table tbody tr.pt-marked td,
html.dark .pt-table tbody tr.pt-marked td {
  background: var(--info-bg);
  font-weight: bold;
}

.pt-table tbody tr.pt-marked td:first-child {
  box-shadow: inset 4px 0 0 var(--primary-blue);
}

.pt-band {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(var(--pt-head-h) + (100% - var(--pt-head-h) - var(--pt-row-h)) / 2);
  height: var(--pt-row-h);
  box-sizing: border-box;
  border-top: 2px solid rgba(13, 148, 136, 0.6);
  border-bottom: 2px solid rgba(13, 148, 136, 0.6);
  background: rgba(13, 148, 136, 0.12);
  pointer-events: none;
}

html.dark .pt-band {
  border-color: rgba(96, 165, 250, 0.7);
  background: rgba(96, 165, 250, 0.16);
}

/* Enthalpy markers (D16, D27, section 5.5) */
.ref-calc-page .calc-row.calc-marker .calc-num {
  color: #b91c1c;
  font-weight: 700;
}

.ref-calc-page .calc-row.calc-marker .calc-unit {
  display: none;
}

.ref-calc-page #ref-calc-entry.calc-marker {
  color: #b91c1c;
}

html.dark .ref-calc-page .calc-row.calc-marker .calc-num,
html.dark .ref-calc-page #ref-calc-entry.calc-marker {
  color: #f87171;
}