/* Coverage Calculator page styles */

/* ── Page layout ──────────────────────────────────────────────── */
.calc-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--sp-10);
  align-items: start;
}
@media (max-width: 900px) {
  .calc-layout { grid-template-columns: 1fr; }
}

.calc-inputs {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

/* Sticky results panel */
.calc-results-wrap {
  position: sticky;
  top: calc(var(--header-height, 72px) + var(--sp-4));
}

/* ── Section titles ────────────────────────────────────────────── */
.calc-section {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-5) var(--sp-6);
}
.calc-section + .calc-section { margin-top: 0; }
.calc-section__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  margin: 0 0 var(--sp-4);
  color: var(--color-charcoal);
}

/* ── Material pills ────────────────────────────────────────────── */
#material-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}
.calc-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border: 1.5px solid var(--color-border-strong);
  border-radius: 999px;
  background: var(--color-white);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 120ms ease;
}
.calc-pill:hover {
  border-color: var(--color-sage);
  color: var(--color-sage);
}
.calc-pill--active {
  background: var(--color-sage);
  border-color: var(--color-sage);
  color: var(--color-white);
}
.calc-pill__icon { font-size: 1.1em; }

/* ── Zone rows ─────────────────────────────────────────────────── */
.calc-zone {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.calc-zone + .calc-zone {
  padding-top: var(--sp-4);
  border-top: 1px dashed var(--color-border);
  margin-top: var(--sp-2);
}
.calc-zone__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.calc-zone__label {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.calc-zone__remove {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: 16px;
  padding: 0 var(--sp-1);
  line-height: 1;
}
.calc-zone__remove:hover { color: var(--color-error, #c0392b); }

/* Area mode tabs */
.calc-area-modes {
  display: flex;
  gap: 2px;
  background: var(--color-gray-100);
  border-radius: var(--radius-sm);
  padding: 3px;
}
.calc-area-tab {
  flex: 1;
  padding: var(--sp-2) var(--sp-3);
  border: none;
  border-radius: calc(var(--radius-sm) - 2px);
  background: transparent;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 120ms ease;
}
.calc-area-tab--active {
  background: var(--color-white);
  color: var(--color-charcoal);
  font-weight: var(--weight-medium);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Dimension inputs row */
.calc-dimensions {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: end;
  gap: var(--sp-2);
}
.calc-dimensions__times {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  padding-bottom: var(--sp-3);
  text-align: center;
}
.calc-area-hint {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}
.calc-area-hint strong { color: var(--color-charcoal); }

/* Add zone button */
.calc-add-zone {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border: 1.5px dashed var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: transparent;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  width: 100%;
  justify-content: center;
  transition: all 120ms ease;
  margin-top: var(--sp-2);
}
.calc-add-zone:hover {
  border-color: var(--color-sage);
  color: var(--color-sage);
}

/* ── Depth control ──────────────────────────────────────────────── */
.calc-depth-control {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.calc-depth-row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.calc-depth-row input[type="range"] {
  flex: 1;
  accent-color: var(--color-sage);
  cursor: pointer;
}
.calc-depth-number {
  width: 72px;
  text-align: right;
  padding-right: var(--sp-2);
}
.calc-depth-unit {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  white-space: nowrap;
}
.calc-depth-presets {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}
.calc-depth-preset {
  padding: 4px 12px;
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  background: transparent;
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 100ms ease;
}
.calc-depth-preset--active {
  background: var(--color-sage);
  border-color: var(--color-sage);
  color: var(--color-white);
}
.calc-depth-hint {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.5;
}

/* Buffer checkbox row */
.calc-buffer-row {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  padding: var(--sp-3);
  background: var(--color-gray-50);
  border-radius: var(--radius-sm);
}
.calc-buffer-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-sage);
  flex-shrink: 0;
  margin-top: 2px;
  cursor: pointer;
}
.calc-buffer-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.4;
  cursor: pointer;
}
.calc-buffer-label strong { color: var(--color-charcoal); }

/* ── Results panel ──────────────────────────────────────────────── */
.calc-results {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.calc-results-empty {
  padding: var(--sp-10) var(--sp-6);
  text-align: center;
  color: var(--color-text-muted);
}
.calc-results-empty__icon {
  font-size: 48px;
  margin-bottom: var(--sp-3);
}
.calc-results-empty p { font-size: var(--text-sm); margin: 0; }

/* Headline result */
.calc-headline {
  background: var(--color-charcoal);
  color: var(--color-white);
  padding: var(--sp-6);
  text-align: center;
}
.calc-headline__bags {
  font-family: var(--font-heading);
  font-size: 64px;
  font-weight: 700;
  line-height: 1;
}
.calc-headline__label {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--sp-2);
}
.calc-headline__sub {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  margin-bottom: var(--sp-4);
}
.calc-headline__cost {
  font-size: var(--text-base);
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  padding: var(--sp-2) var(--sp-4);
  display: inline-block;
}
.calc-headline__cost-sub {
  display: block;
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.55);
  margin-top: 2px;
}

/* Zone breakdown */
.calc-zone-breakdown {
  padding: var(--sp-4) var(--sp-6);
  border-bottom: 1px solid var(--color-border);
}
.calc-zone-row {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: 3px 0;
}

/* Workings accordion */
.calc-workings {
  border-top: 1px solid var(--color-border);
}
.calc-workings__title {
  font-size: var(--text-sm);
  font-weight: 700;
  padding: var(--sp-4) var(--sp-6);
  cursor: pointer;
  color: var(--color-text-secondary);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.calc-workings__title::after {
  content: '▾';
  font-size: 12px;
  transition: transform 150ms ease;
}
details[open] .calc-workings__title::after { transform: rotate(180deg); }
.calc-workings__body {
  padding: 0 var(--sp-6) var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.calc-step {
  display: flex;
  gap: var(--sp-3);
  align-items: flex-start;
}
.calc-step__num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-sage);
  color: var(--color-white);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}
.calc-step__label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin: 0 0 2px;
}
.calc-step__formula {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.5;
  font-family: ui-monospace, 'SFMono-Regular', monospace;
}
.calc-workings__buffer-note,
.calc-workings__density-note {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  background: var(--color-gray-50);
  border-left: 3px solid var(--color-sage);
  padding: var(--sp-3) var(--sp-4);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
  margin: 0;
}
.calc-step-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin: 0 0 var(--sp-2);
}

/* CTAs */
.calc-cta-group {
  padding: var(--sp-4) var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  border-top: 1px solid var(--color-border);
}
.calc-cta-group .btn { width: 100%; text-align: center; }
.calc-bulk-hint {
  padding: var(--sp-3) var(--sp-6) var(--sp-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}
.calc-bulk-hint a { color: var(--color-sage); }

/* ── Coverage reference table ──────────────────────────────────── */
.calc-coverage-table details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.calc-coverage-table summary {
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text-secondary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-gray-50);
}
.calc-coverage-table summary::after {
  content: '▾';
  font-size: 12px;
  transition: transform 150ms ease;
}
.calc-coverage-table details[open] summary::after { transform: rotate(180deg); }
.calc-coverage-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.calc-coverage-table thead tr {
  background: var(--color-gray-100);
}
.calc-coverage-table th {
  padding: var(--sp-2) var(--sp-4);
  text-align: left;
  font-weight: 700;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.calc-coverage-table td {
  padding: var(--sp-2) var(--sp-4);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}
.calc-coverage-table td strong { color: var(--color-charcoal); }

/* Share row */
.calc-share-row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) 0 0;
}
.calc-share-row p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}

/* Print styles */
@media print {
  .site-header, .site-footer, .utility-bar, .mobile-nav,
  .calc-inputs, .calc-add-zone, .calc-cta-group, .calc-bulk-hint {
    display: none !important;
  }
  .calc-layout { grid-template-columns: 1fr; }
  .calc-results { border: none; box-shadow: none; }
  .calc-headline { background: #222; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}