/* ==========================================================================
   Keifa Civil Calculator - styles for the generated hub and calculator pages.
   Loaded after styles.css; reuses the existing design tokens.
   ========================================================================== */

/* Anchor-based calculator navigation reuses .tab-btn pills */
a.tab-btn,
a.tab-btn:hover,
a.tab-btn.active {
  text-decoration: none;
}

a.btn {
  text-decoration: none;
}

/* --- Breadcrumb ---------------------------------------------------------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 18px auto 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--ink-secondary);
  text-decoration: none;
  font-weight: 600;
}

.breadcrumb a:hover {
  color: var(--teal);
  text-decoration: underline;
}

.breadcrumb .sep {
  opacity: 0.55;
}

.breadcrumb [aria-current="page"] {
  color: var(--muted);
}

.breadcrumb .lang-alt {
  margin-inline-start: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-pill);
  background: var(--panel-glass);
}

/* --- Hub (category dashboard) ------------------------------------------- */
.hub {
  padding-bottom: 8px;
}

.hub-intro {
  max-width: 60ch;
  color: var(--ink-secondary);
}

.hub-cat {
  margin-top: 30px;
}

.hub-cat-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--ink);
}

.hub-cat-title .cat-icon {
  font-size: 1.3rem;
  line-height: 1;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 14px;
}

.hub-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  background: var(--panel-glass);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: var(--ink);
  transition: var(--trans);
  backdrop-filter: blur(12px);
}

.hub-card:hover {
  border-color: var(--teal);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.hub-card-top {
  display: flex;
  align-items: center;
  gap: 10px;
}

.hub-card-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.hub-card-name {
  font-weight: 800;
  font-size: 1rem;
}

.hub-card-desc {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* --- Related calculators / articles ------------------------------------- */
.related-calcs,
.related-articles {
  margin-top: 34px;
}

.related-calcs h2,
.related-articles h2 {
  font-size: 1.1rem;
  font-weight: 800;
  margin: 0 0 14px;
  color: var(--ink);
}

.related-articles ul {
  margin: 0;
  padding-inline-start: 20px;
}

.related-articles li {
  margin-bottom: 8px;
  line-height: 1.6;
}

.related-articles a {
  color: var(--teal);
  font-weight: 600;
  text-decoration: none;
}

.related-articles a:hover {
  text-decoration: underline;
}

/* --- Entry stub ---------------------------------------------------------- */
.entry-stub {
  max-width: 620px;
  margin: 12vh auto;
  padding: 28px;
  text-align: center;
}

.entry-stub .entry-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 16px;
  font-weight: 700;
}

/* ==========================================================================
   Phase 2 — formulas & assumptions panel, confidence label, notices,
   multi-element rows and validation messages.
   ========================================================================== */

.panel-info {
  margin-top: 18px;
  padding: 16px 18px;
  background: var(--panel-glass);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.confidence-label {
  margin: 0 0 10px;
  font-size: 0.85rem;
  color: var(--muted);
}

.confidence-label b {
  color: var(--ink);
  font-weight: 800;
}

.confidence-label b[data-confidence="detailed"],
.confidence-label b[data-confidence="conversion"] {
  color: var(--teal);
}

.formulas-panel summary {
  cursor: pointer;
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--ink);
  padding: 4px 0;
  outline-offset: 3px;
}

.formulas-panel summary::marker {
  color: var(--teal);
}

.info-sub {
  margin: 14px 0 8px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-transform: uppercase;
}

.formula-list,
.assumption-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.formula-list li,
.assumption-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--ink-secondary);
}

.formula-list code {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink);
  background: var(--teal-soft);
  border-radius: 6px;
  padding: 2px 8px;
  white-space: nowrap;
  unicode-bidi: isolate;
}

.assumption-tag {
  flex: 0 0 auto;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--panel-border);
  color: var(--ink-secondary);
  background: var(--panel-border-subtle, transparent);
  white-space: nowrap;
}

.assumption-tag.tag-exact {
  border-color: var(--teal);
  color: var(--teal);
}

.assumption-tag.tag-estimate {
  border-style: dashed;
}

.panel-notices {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--panel-border);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--muted);
}

.panel-notices p {
  margin: 0 0 6px;
}

.panel-notices strong {
  color: var(--ink-secondary);
}

.prelim-warning {
  margin: 10px 0 0;
  padding-inline-start: 10px;
  border-inline-start: 3px solid var(--panel-border);
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--muted);
}

/* --- Multi-element rows (brief sections 5, 6) --------------------------- */
.rows-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.rows-list {
  display: grid;
  gap: 12px;
}

.row-card {
  padding: 14px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  background: var(--panel-border-subtle, rgba(255, 255, 255, 0.5));
}

.row-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.row-index {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--teal);
  min-width: 24px;
}

.row-head select {
  flex: 1 1 180px;
}

.row-actions {
  margin-inline-start: auto;
  display: flex;
  gap: 6px;
}

.row-actions button {
  cursor: pointer;
}

.row-fields {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 10px;
}

.row-fields .input-field label {
  font-size: 0.78rem;
}

.row-results {
  margin-top: 10px;
  font-size: 0.82rem;
  color: var(--muted);
}

.row-results b {
  color: var(--ink);
  font-weight: 700;
}

.row-unit-field {
  max-width: 110px;
}

/* --- Validation message (brief section 33) ------------------------------ */
.field-error {
  display: block;
  margin-top: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  color: #dc2626;
}

.input-field input[aria-invalid="true"],
.row-fields input[aria-invalid="true"] {
  border-color: #dc2626;
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12);
}

.calc-blocked {
  font-size: 0.8rem;
  color: var(--muted);
}

/* ==========================================================================
   §23 — history upgrade: search, grouping and per-item actions.
   ========================================================================== */

.history-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
}

.history-search {
  flex: 1 1 200px;
  min-width: 160px;
  padding: 8px 14px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-pill);
  background: var(--panel-glass);
  color: var(--ink);
  font: inherit;
  font-size: 0.86rem;
}

.history-search:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.history-group {
  margin-bottom: 16px;
}

.history-group-title {
  margin: 0 0 8px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--muted);
}

.history-item-info {
  flex: 1 1 auto;
  min-width: 0;
}

.history-name {
  font-weight: 600;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.history-result {
  color: var(--muted);
  font-size: 0.78rem;
}

.history-result b {
  color: var(--ink);
}

.history-item-actions {
  display: flex;
  align-items: center;
  gap: 2px;
}

.hist-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1;
  padding: 5px 7px;
  border-radius: 6px;
  cursor: pointer;
}

.hist-btn:hover {
  background: var(--teal-soft);
  color: var(--ink);
}

.hist-btn:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 1px;
}

.history-rename-input {
  flex: 1 1 160px;
  padding: 4px 8px;
  border: 1px solid var(--teal);
  border-radius: 6px;
  background: var(--panel-glass);
  color: var(--ink);
  font: inherit;
  font-size: 0.86rem;
}

/* ==========================================================================
   Phase 3 — project mode, combined BOQ, price book and print report.
   ========================================================================== */

.boq-toggles {
  margin: 6px 0 12px;
}

.boq-toggle-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin-top: 8px;
}

.boq-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--ink-secondary);
  cursor: pointer;
}

.boq-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.boq-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.boq-table th,
.boq-table td {
  border: 1px solid var(--panel-border);
  padding: 6px 8px;
  text-align: start;
  vertical-align: middle;
  white-space: nowrap;
}

.boq-table thead th {
  background: var(--panel-border-subtle, rgba(0, 0, 0, 0.03));
  font-weight: 800;
  color: var(--ink);
}

.boq-section-row td {
  background: var(--teal-soft);
  font-weight: 800;
  color: var(--ink);
}

.boq-cell {
  width: 100%;
  min-width: 74px;
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 4px 6px;
  font: inherit;
  background: var(--panel-glass);
  color: var(--ink);
}

.boq-desc {
  min-width: 170px;
}

.boq-no {
  font-weight: 800;
  color: var(--muted);
}

.boq-actions-col {
  width: 72px;
  white-space: nowrap;
}

.boq-totals {
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  background: var(--panel-glass);
}

.boq-total-line {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 4px 0;
  font-size: 0.86rem;
  color: var(--ink-secondary);
}

.boq-total-line b {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.boq-subtotal {
  border-top: 1px solid var(--panel-border);
  margin-top: 4px;
  padding-top: 8px;
}

.boq-grand {
  border-top: 2px solid var(--teal);
  margin-top: 6px;
  padding-top: 8px;
  font-size: 1rem;
}

.boq-grand b {
  color: var(--teal);
  font-weight: 900;
}

.boq-print-head {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin-bottom: 10px;
  font-size: 0.8rem;
  color: var(--muted);
}

.boq-print-head b {
  color: var(--ink);
}

.pricebook-wrap {
  margin-top: 6px;
}

.add-to-project {
  border: 1px dashed var(--panel-border);
}

/* ==========================================================================
   Phase 5 — hub search, recent chips, calculator action bar, simple mode.
   ========================================================================== */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* Keyboard-only skip link (brief section 38) */
.skip-link {
  position: absolute;
  inset-inline-start: 12px;
  top: -60px;
  z-index: 999;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  background: var(--tab-active-grad);
  color: var(--tab-active-color);
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 12px;
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.hub-search-wrap {
  margin-top: 18px;
}

.hub-search {
  width: 100%;
  padding: 12px 18px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-pill);
  background: var(--panel-glass);
  color: var(--ink);
  font: inherit;
  font-size: 0.95rem;
}

.hub-search:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.hub-recent {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
}

.hub-recent-title {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--muted);
}

.hub-recent-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-pill);
  background: var(--panel-glass);
  color: var(--ink-secondary);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
}

.hub-recent-chip:hover {
  border-color: var(--teal);
  color: var(--ink);
}

.calc-action-bar {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-inline-start: auto;
}

/* Simple mode (brief section 47) hides prices and advanced options only. */
body.mode-simple .advanced-only {
  display: none !important;
}

/* --- Print-friendly BOQ report (brief section 24) ----------------------- */
@media print {
  body.printing-boq .topbar-wrapper,
  body.printing-boq .ad-wrapper,
  body.printing-boq .footer-wrapper,
  body.printing-boq .hero,
  body.printing-boq .breadcrumb,
  body.printing-boq .related-calcs,
  body.printing-boq .related-articles,
  body.printing-boq .history-section,
  body.printing-boq .toast,
  body.printing-boq .panel-info,
  body.printing-boq .panel-header-bar,
  body.printing-boq .boq-toggles,
  body.printing-boq .boq-actions-col,
  body.printing-boq #panel-project .inputs-card {
    display: none !important;
  }
  body.printing-boq .calculator-panel { display: none !important; }
  body.printing-boq #panel-project { display: block !important; }
  body.printing-boq .calc-layout-grid { display: block !important; }
  body.printing-boq .calc-card {
    box-shadow: none !important;
    border: none !important;
    background: none !important;
    padding: 0 !important;
  }
  body.printing-boq .boq-table { font-size: 9.5pt; }
  body.printing-boq .boq-scroll { overflow: visible !important; }
  body.printing-boq .boq-cell {
    border: none !important;
    background: none !important;
    padding: 0 !important;
    min-width: 0 !important;
    appearance: none;
    -webkit-appearance: none;
  }
  body.printing-boq .boq-print-head { display: flex !important; }
}

/* ==========================================================================
   Brand links — the logo + product name in the header and footer both go to
   the language hub (the app's main page).
   ========================================================================== */

a.brand,
a.footer-brand-header {
  text-decoration: none;
  color: inherit;
}

a.brand:hover .brand-text b {
  color: var(--teal);
}

a.footer-brand-header:hover .footer-brand-title {
  color: var(--amber);
}

/* ==========================================================================
   Look: "Blueprint Precision" — component refinements layered over the token
   set in styles.css. Note: letter-spacing is scoped to Latin text only —
   tracking Arabic would break glyph joining.
   ========================================================================== */

/* A faint measurement grid behind the hero / hub search of every page. */
.hero,
.hub-search-wrap {
  background-image:
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    linear-gradient(var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px, 24px 24px;
  background-position: -1px -1px;
}

/* Hairline rules under section labels give the technical-document rhythm. */
.card-subtitle,
.table-title {
  padding-bottom: 8px;
  border-bottom: 1px solid var(--panel-border-subtle);
}

/* Figures use tabular numerals so columns of numbers line up. */
.tile-val,
.metric-tile b,
.boq-table td,
.boq-cell,
.boq-total-line b,
.tile-sub,
.schematic-stat,
.equiv-val,
.history-result b,
.history-item-date {
  font-variant-numeric: tabular-nums;
}

/* Keyboard focus is always visible, in the accent colour. */
:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

/* English micro-labels read as technical stamps; Arabic keeps its natural form. */
html[lang="en"] .card-subtitle,
html[lang="en"] .table-title,
html[lang="en"] .tile-label,
html[lang="en"] .eyebrow,
html[lang="en"] .badge,
html[lang="en"] .history-group-title,
html[lang="en"] .hub-cat-title,
html[lang="en"] .box-title,
html[lang="en"] .info-sub {
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

@media (max-width: 640px) {
  .hub-grid {
    grid-template-columns: 1fr;
  }
  .breadcrumb {
    font-size: 0.8rem;
  }
  .row-fields {
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  }
}