/* ============================================================
   MEGA STANDARD — Engineering Tools
   Shared stylesheet for /tools/ calculator pages.
   Colours come exclusively from style.css variables so that
   light/dark mode via theme.js works with no extra work.
   ============================================================ */

/* ── Hero ──────────────────────────────────────────────────── */
.tool-hero {
  background: var(--bg-1);
  padding: 130px 0 50px;
  border-bottom: 1px solid var(--border-1);
  position: relative;
  overflow: hidden;
}

.tool-hero::before {
  content: '';
  position: absolute;
  top: -40%;
  inset-inline-end: -10%;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, var(--accent-dim) 0%, transparent 68%);
  pointer-events: none;
}

.tool-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-3);
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.tool-breadcrumb a { color: var(--text-3); transition: color var(--t-fast); }
.tool-breadcrumb a:hover { color: var(--accent-light); }
.tool-breadcrumb i { font-size: 0.62rem; opacity: 0.6; }

.tool-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.9rem, 4.2vw, 2.9rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  max-width: 20ch;
}

.tool-hero-desc {
  color: var(--text-2);
  font-size: 1.02rem;
  line-height: 1.7;
  max-width: 62ch;
}

.tool-hero-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.tool-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 14px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-2);
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-radius: var(--r-full);
}

.tool-tag i { color: var(--accent-light); font-size: 0.78rem; }

/* ── Main layout ───────────────────────────────────────────────
   The load list needs real width -- nine columns squeezed into a
   half-width column truncates the labels. So it gets a full-width
   row of its own, and the settings/results sit side by side below.
─────────────────────────────────────────────────────────────── */
.tool-section { background: var(--bg-2); padding: 56px 0 72px; }

.tool-loadlist { margin-bottom: 24px; }

.tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

@media (max-width: 1000px) {
  .tool-layout { grid-template-columns: minmax(0, 1fr); }
}

/* ── Step wizard ───────────────────────────────────────────────
   The calculator is a guided flow: one question at a time, plain
   language, technical inputs tucked behind "more options".
─────────────────────────────────────────────────────────────── */
.tool-stepper {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin-bottom: 26px;
  counter-reset: step;
}

.tool-stepper-item {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  position: relative;
  text-align: center;
  min-width: 0;
}

/* Connector line between dots. It runs centre-to-centre, so it is inset by
   the dot radius (18px) plus a small gap at each end and never reaches the
   circles. Symmetric, so physical left/width is correct in RTL too. */
.tool-stepper-item::before {
  content: '';
  position: absolute;
  top: 17px;
  left: calc(-50% + 22px);
  width: calc(100% - 44px);
  height: 2px;
  background: var(--border-2);
  z-index: 0;
}
.tool-stepper-item:first-child::before { display: none; }
.tool-stepper-item.is-done::before,
.tool-stepper-item.is-active::before { background: var(--accent); }

.tool-stepper-dot {
  position: relative;
  z-index: 1;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--bg-1);
  border: 2px solid var(--border-2);
  color: var(--text-3);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.92rem;
  transition: all var(--t-fast);
  flex-shrink: 0;
}

.tool-stepper-item.is-active .tool-stepper-dot {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 0 5px var(--accent-dim);
}

/* The accent tint is translucent, so it must sit on an opaque base --
   otherwise the connector line behind the dot shows straight through it. */
.tool-stepper-item.is-done .tool-stepper-dot {
  border-color: var(--accent);
  background-color: var(--bg-1);
  background-image: linear-gradient(var(--accent-dim), var(--accent-dim));
  color: var(--accent-light);
}

.tool-stepper-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-3);
  line-height: 1.35;
  max-width: 15ch;
}

.tool-stepper-item.is-active .tool-stepper-label { color: var(--text-1); }
.tool-stepper-item.is-done .tool-stepper-label { color: var(--text-2); }

@media (max-width: 620px) {
  .tool-stepper-label { display: none; }
  .tool-stepper-item::before { top: 17px; }
}

/* Step panels: one at a time */
.tool-step { display: none; }
.tool-step.is-active { display: block; }

.tool-step-head { margin-bottom: 22px; }

.tool-step-title {
  font-family: var(--font-heading);
  font-size: clamp(1.25rem, 2.6vw, 1.6rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-1);
  margin-bottom: 8px;
}

.tool-step-sub {
  color: var(--text-2);
  font-size: 0.94rem;
  line-height: 1.7;
  max-width: 68ch;
}

/* "Why we ask" helper note */
.tool-why {
  display: flex;
  gap: 11px;
  padding: 13px 16px;
  margin-top: 16px;
  background: var(--bg-3);
  border: 1px solid var(--border-1);
  border-radius: var(--r-sm);
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--text-2);
}
.tool-why i { color: var(--accent-light); margin-top: 3px; flex-shrink: 0; }
.tool-why strong { color: var(--text-1); font-weight: 600; }

/* Wizard navigation */
.tool-wizard-nav {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--border-1);
}

.tool-wizard-nav .tool-nav-spacer { margin-inline-start: auto; }

.tool-btn-next,
.tool-btn-back {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 26px;
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: var(--r-full);
  transition: all var(--t-fast);
  cursor: pointer;
  border: none;
}

.tool-btn-next {
  color: #fff;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  box-shadow: 0 4px 20px var(--accent-glow);
}
.tool-btn-next:hover { transform: translateY(-2px); box-shadow: 0 8px 32px var(--accent-glow); }

.tool-btn-back {
  color: var(--text-2);
  background: transparent;
  border: 1px solid var(--border-2);
}
.tool-btn-back:hover { color: var(--text-1); border-color: var(--accent); background: var(--accent-dim); }

[dir="rtl"] .tool-btn-next i.fa-arrow-right,
[dir="rtl"] .tool-btn-back i.fa-arrow-left { transform: scaleX(-1); }

/* ── Step 1: pick what to power ────────────────────────────── */
.tool-preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  gap: 10px;
  margin-bottom: 26px;
}

.tool-preset-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 18px 12px;
  text-align: center;
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-radius: var(--r-md);
  color: var(--text-1);
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.35;
  cursor: pointer;
  transition: all var(--t-fast);
}

.tool-preset-btn i {
  font-size: 1.3rem;
  color: var(--accent-light);
  transition: transform var(--t-fast);
}

.tool-preset-btn:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-3px);
}
.tool-preset-btn:hover i { transform: scale(1.12); }

/* A load, shown as a friendly card rather than a spreadsheet row */
.tool-load-list { display: flex; flex-direction: column; gap: 12px; }

.tool-load-card {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 16px 18px;
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-radius: var(--r-md);
}

.tool-load-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  background: var(--accent-dim);
  color: var(--accent-light);
  font-size: 1.1rem;
}

.tool-load-body { min-width: 0; }

.tool-load-name {
  width: 100%;
  padding: 6px 0;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-1);
  background: transparent;
  border: none;
  border-bottom: 1px dashed transparent;
  outline: none;
}
.tool-load-name:hover { border-bottom-color: var(--border-2); }
.tool-load-name:focus { border-bottom-color: var(--accent); }

.tool-load-fields {
  display: flex;
  gap: 20px;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-top: 10px;
}

.tool-mini-field { display: flex; flex-direction: column; gap: 6px; }

.tool-mini-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* quantity − n + */
.tool-qty {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-1);
  border-radius: var(--r-sm);
  background: var(--bg-3);
  overflow: hidden;
}

.tool-qty button {
  width: 34px;
  height: 38px;
  display: grid;
  place-items: center;
  color: var(--text-2);
  font-size: 0.85rem;
  transition: all var(--t-fast);
}
.tool-qty button:hover { background: var(--accent-dim); color: var(--accent-light); }

.tool-qty input {
  width: 46px;
  height: 38px;
  text-align: center;
  border: none;
  background: transparent;
  color: var(--text-1);
  font-size: 0.95rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  outline: none;
  -moz-appearance: textfield;
}
.tool-qty input::-webkit-outer-spin-button,
.tool-qty input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

.tool-power-input {
  width: 96px;
  height: 38px;
  padding: 0 12px;
  background: var(--bg-3);
  border: 1px solid var(--border-1);
  border-radius: var(--r-sm);
  color: var(--text-1);
  font-size: 0.95rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  outline: none;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.tool-power-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.tool-power-input.is-invalid { border-color: #e05252; box-shadow: 0 0 0 3px rgba(224,82,82,0.18); }

.tool-unit-select {
  height: 38px;
  padding: 0 30px 0 12px;
  background: var(--bg-3);
  border: 1px solid var(--border-1);
  border-radius: var(--r-sm);
  color: var(--text-1);
  font-size: 0.9rem;
  cursor: pointer;
  outline: none;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-3) 50%),
                    linear-gradient(135deg, var(--text-3) 50%, transparent 50%);
  background-position: right 14px center, right 9px center;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}
[dir="rtl"] .tool-unit-select {
  padding: 0 12px 0 30px;
  background-position: left 9px center, left 14px center;
  background-image: linear-gradient(-45deg, transparent 50%, var(--text-3) 50%),
                    linear-gradient(-135deg, var(--text-3) 50%, transparent 50%);
}

.tool-load-remove {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  color: var(--text-3);
  transition: all var(--t-fast);
  align-self: flex-start;
}
.tool-load-remove:hover { color: #e05252; background: rgba(224,82,82,0.1); }

/* per-load advanced disclosure */
.tool-load-more { margin-top: 12px; }
.tool-load-more > summary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-3);
  cursor: pointer;
  list-style: none;
}
.tool-load-more > summary::-webkit-details-marker { display: none; }
.tool-load-more > summary:hover { color: var(--accent-light); }
.tool-load-more > summary i { font-size: 0.65rem; transition: transform var(--t-fast); }
.tool-load-more[open] > summary i { transform: rotate(90deg); }
[dir="rtl"] .tool-load-more > summary i { transform: scaleX(-1); }
[dir="rtl"] .tool-load-more[open] > summary i { transform: scaleX(-1) rotate(-90deg); }
.tool-load-more-body { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 12px; }

.tool-empty-hint {
  padding: 34px 24px;
  text-align: center;
  color: var(--text-3);
  border: 1px dashed var(--border-2);
  border-radius: var(--r-md);
  font-size: 0.9rem;
  line-height: 1.6;
}
.tool-empty-hint i { display: block; font-size: 1.6rem; margin-bottom: 12px; opacity: 0.5; }

@media (max-width: 560px) {
  .tool-load-card { grid-template-columns: minmax(0, 1fr) auto; }
  .tool-load-icon { display: none; }
  .tool-load-fields { gap: 14px; }
}

/* ── Steps 2 & 3: big tappable choices ─────────────────────── */
.tool-choice-group { margin-bottom: 26px; }

.tool-choice-q {
  font-family: var(--font-heading);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 4px;
}
.tool-choice-qsub { font-size: 0.85rem; color: var(--text-3); margin-bottom: 14px; line-height: 1.6; }

.tool-choice-list { display: grid; gap: 10px; }

@media (min-width: 760px) {
  .tool-choice-list.is-cols { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
}

.tool-choice {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 15px 17px;
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: all var(--t-fast);
}

.tool-choice:hover { border-color: var(--accent); background: var(--accent-dim); }

.tool-choice.is-selected {
  border-color: var(--accent);
  background: var(--accent-dim);
  box-shadow: 0 0 0 1px var(--accent);
}

.tool-choice input { position: absolute; opacity: 0; pointer-events: none; }

.tool-choice-mark {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
  border-radius: 50%;
  border: 2px solid var(--border-2);
  display: grid;
  place-items: center;
  transition: all var(--t-fast);
}
.tool-choice-mark::after {
  content: '';
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: transparent;
  transition: background var(--t-fast);
}
.tool-choice.is-selected .tool-choice-mark { border-color: var(--accent); }
.tool-choice.is-selected .tool-choice-mark::after { background: var(--accent); }

.tool-choice-text { min-width: 0; }
.tool-choice-title { font-size: 0.94rem; font-weight: 600; color: var(--text-1); line-height: 1.4; }
.tool-choice-hint { font-size: 0.82rem; color: var(--text-3); line-height: 1.55; margin-top: 3px; }

.tool-choice-badge {
  display: inline-block;
  margin-inline-start: 8px;
  padding: 1px 8px;
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent-light);
  background: var(--accent-dim);
  border: 1px solid var(--border-2);
  border-radius: var(--r-full);
  vertical-align: middle;
}

/* Per-motor question block on step 2 */
.tool-motor-block {
  padding: 20px;
  background: var(--bg-1);
  border: 1px solid var(--border-1);
  border-radius: var(--r-md);
  margin-bottom: 16px;
}
.tool-motor-block:last-of-type { margin-bottom: 0; }

.tool-motor-head {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 15px;
}
.tool-motor-head i { color: var(--accent-light); }
.tool-motor-name { font-family: var(--font-heading); font-weight: 700; color: var(--text-1); font-size: 1rem; }
.tool-motor-spec { font-size: 0.82rem; color: var(--text-3); margin-inline-start: auto; white-space: nowrap; }

/* ── Step 4: plain-language answer ─────────────────────────── */
.tool-plain {
  display: flex;
  gap: 14px;
  padding: 18px 20px;
  margin-bottom: 20px;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: var(--r-md);
}
.tool-plain > i { color: var(--accent-light); font-size: 1.15rem; margin-top: 2px; flex-shrink: 0; }
.tool-plain-title {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 6px;
}
.tool-plain p { font-size: 0.98rem; line-height: 1.75; color: var(--text-1); }
.tool-plain p + p { margin-top: 10px; }
.tool-plain strong { color: var(--accent-light); font-weight: 700; }

/* Collapsible technical detail on the result step */
.tool-detail-toggle { margin-top: 20px; }
.tool-detail-toggle > summary {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 18px;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--text-2);
  background: var(--bg-3);
  border: 1px solid var(--border-1);
  border-radius: var(--r-full);
  cursor: pointer;
  list-style: none;
  transition: all var(--t-fast);
}
.tool-detail-toggle > summary::-webkit-details-marker { display: none; }
.tool-detail-toggle > summary:hover { color: var(--text-1); border-color: var(--accent); background: var(--accent-dim); }
.tool-detail-toggle > summary i { font-size: 0.7rem; transition: transform var(--t-fast); }
.tool-detail-toggle[open] > summary i { transform: rotate(180deg); }
.tool-detail-body { margin-top: 18px; }

/* ── Panels ────────────────────────────────────────────────── */
.tool-panel {
  background: var(--bg-1);
  border: 1px solid var(--border-1);
  border-radius: var(--r-md);
  padding: 26px;
  box-shadow: var(--shadow-card);
}

.tool-panel + .tool-panel { margin-top: 22px; }

.tool-panel-head {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border-1);
}

.tool-panel-head i {
  color: var(--accent-light);
  font-size: 1rem;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  background: var(--accent-dim);
  border-radius: var(--r-sm);
  flex-shrink: 0;
}

.tool-panel-title {
  font-family: var(--font-heading);
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--text-1);
}

.tool-panel-step {
  margin-inline-start: auto;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-3);
  white-space: nowrap;
}

/* ── Load list table ───────────────────────────────────────── */
.tool-table-wrap { overflow-x: auto; margin: 0 -6px; padding: 0 6px; }

.tool-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 8px;
  table-layout: fixed;      /* widths come from the colgroup, so nothing truncates */
  min-width: 980px;         /* below this the wrapper scrolls instead of squeezing */
}

.tool-table thead th {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-3);
  text-align: start;
  padding: 0 10px 6px;
  white-space: nowrap;
}

.tool-table tbody tr { background: var(--bg-2); }

.tool-table tbody td {
  padding: 8px 10px;
  vertical-align: middle;
  border-block: 1px solid var(--border-1);
}

.tool-table tbody td:first-child {
  border-inline-start: 1px solid var(--border-1);
  border-start-start-radius: var(--r-sm);
  border-end-start-radius: var(--r-sm);
}

.tool-table tbody td:last-child {
  border-inline-end: 1px solid var(--border-1);
  border-start-end-radius: var(--r-sm);
  border-end-end-radius: var(--r-sm);
}

/* Compact controls used inside the table */
.tool-input,
.tool-select {
  width: 100%;
  padding: 9px 11px;
  font-family: var(--font-body);
  font-size: 0.86rem;
  background: var(--bg-3);
  border: 1px solid var(--border-1);
  border-radius: var(--r-sm);
  color: var(--text-1);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  outline: none;
}

.tool-select {
  appearance: none;
  padding-inline-end: 30px;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-3) 50%),
                    linear-gradient(135deg, var(--text-3) 50%, transparent 50%);
  background-position: right 14px center, right 9px center;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  cursor: pointer;
}

html[dir="rtl"] .tool-select,
[dir="rtl"] .tool-select {
  background-position: left 9px center, left 14px center;
  background-image: linear-gradient(-45deg, transparent 50%, var(--text-3) 50%),
                    linear-gradient(-135deg, var(--text-3) 50%, transparent 50%);
}

.tool-input::placeholder { color: var(--text-3); }

.tool-input:focus,
.tool-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.tool-input.is-invalid {
  border-color: #e05252;
  box-shadow: 0 0 0 3px rgba(224, 82, 82, 0.18);
}

.tool-input[type="number"] { text-align: end; font-variant-numeric: tabular-nums; }

/* Column widths are set by the table's <colgroup>; these remain as hooks. */
.tool-col-num, .tool-col-pf, .tool-col-qty { width: auto; }
.tool-col-act { width: auto; text-align: center; }

/* Keep long option labels readable rather than clipped mid-word. */
.tool-table .tool-select { text-overflow: ellipsis; }

.tool-row-del {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  color: var(--text-3);
  background: transparent;
  transition: color var(--t-fast), background var(--t-fast);
}

.tool-row-del:hover { color: #e05252; background: rgba(224, 82, 82, 0.1); }

.tool-table-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.tool-btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 16px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-2);
  background: var(--bg-3);
  border: 1px solid var(--border-1);
  border-radius: var(--r-full);
  transition: all var(--t-fast);
}

.tool-btn-sm:hover {
  color: var(--text-1);
  border-color: var(--accent);
  background: var(--accent-dim);
}

.tool-btn-sm i { font-size: 0.72rem; color: var(--accent-light); }

/* ── Generic field grid (settings panel) ───────────────────── */
.tool-field-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
}

.tool-field label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-3);
  letter-spacing: 0.045em;
  text-transform: uppercase;
  margin-bottom: 7px;
}

.tool-field-note {
  font-size: 0.74rem;
  color: var(--text-3);
  margin-top: 6px;
  line-height: 1.5;
}

/* Inline help bubble */
.tool-help {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1px solid var(--border-2);
  color: var(--text-3);
  font-size: 0.58rem;
  cursor: help;
  flex-shrink: 0;
  text-transform: none;
  letter-spacing: 0;
}

.tool-help:hover { color: var(--accent-light); border-color: var(--accent); }

.tool-help::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 9px);
  inset-inline-start: 50%;
  transform: translateX(-50%);
  width: max-content;
  max-width: 260px;
  padding: 9px 12px;
  font-size: 0.75rem;
  font-weight: 400;
  line-height: 1.5;
  text-align: start;
  color: var(--text-1);
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: var(--r-sm);
  box-shadow: var(--shadow-float);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-fast);
  z-index: 40;
  pointer-events: none;
}

html[dir="rtl"] .tool-help::after,
[dir="rtl"] .tool-help::after { transform: translateX(50%); }

.tool-help:hover::after { opacity: 1; visibility: visible; }

/* Advanced settings disclosure */
.tool-advanced { margin-top: 18px; border-top: 1px solid var(--border-1); padding-top: 16px; }

.tool-advanced > summary {
  display: flex;
  align-items: center;
  gap: 9px;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-3);
  list-style: none;
  transition: color var(--t-fast);
}

.tool-advanced > summary::-webkit-details-marker { display: none; }
.tool-advanced > summary:hover { color: var(--accent-light); }
.tool-advanced > summary i { transition: transform var(--t-fast); font-size: 0.7rem; }
.tool-advanced[open] > summary i { transform: rotate(90deg); }
html[dir="rtl"] .tool-advanced > summary i,
[dir="rtl"] .tool-advanced > summary i { transform: scaleX(-1); }
html[dir="rtl"] .tool-advanced[open] > summary i,
[dir="rtl"] .tool-advanced[open] > summary i { transform: scaleX(-1) rotate(-90deg); }

.tool-advanced-body { padding-top: 18px; }

/* ── Action bar ────────────────────────────────────────────── */
.tool-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 22px;
}

.tool-actions .btn-primary { border: none; cursor: pointer; }

/* ── Results panel ─────────────────────────────────────────── */
.tool-result-panel {
  position: sticky;
  top: 96px;
  background: var(--bg-1);
  border: 1px solid var(--border-1);
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

@media (max-width: 1000px) {
  .tool-result-panel { position: static; }
}

.tool-result-head {
  padding: 22px 24px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff;
}

.tool-result-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.85;
  margin-bottom: 6px;
}

.tool-result-value {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 2.9rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.tool-result-value small {
  font-size: 0.36em;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-inline-start: 6px;
  opacity: 0.9;
}

.tool-result-sub {
  font-size: 0.84rem;
  opacity: 0.9;
  margin-top: 8px;
  line-height: 1.55;
}

.tool-result-body { padding: 20px 24px 24px; }

.tool-result-empty {
  padding: 44px 24px;
  text-align: center;
  color: var(--text-3);
}

.tool-result-empty i { font-size: 1.7rem; display: block; margin-bottom: 12px; opacity: 0.5; }
.tool-result-empty span { font-size: 0.88rem; line-height: 1.6; display: block; max-width: 30ch; margin: 0 auto; }

/* Breakdown rows */
.tool-breakdown { display: flex; flex-direction: column; }

.tool-break-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border-1);
  font-size: 0.86rem;
}

.tool-break-row:last-child { border-bottom: none; }

.tool-break-row.is-total {
  border-top: 1px solid var(--border-2);
  border-bottom: none;
  margin-top: 6px;
  padding-top: 13px;
  font-weight: 700;
}

.tool-break-key { color: var(--text-2); display: flex; align-items: center; gap: 7px; }
.tool-break-key i { color: var(--text-3); font-size: 0.7rem; }

.tool-break-val {
  color: var(--text-1);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  text-align: end;
}

.tool-break-row.is-driver .tool-break-val { color: var(--accent-light); }

.tool-break-group-title {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-3);
  margin: 18px 0 4px;
  padding-top: 14px;
  border-top: 1px solid var(--border-1);
}

.tool-breakdown > .tool-break-group-title:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

/* Governing-constraint callout */
.tool-driver {
  display: flex;
  gap: 11px;
  padding: 13px 15px;
  margin-top: 18px;
  background: var(--accent-dim);
  border: 1px solid var(--border-2);
  border-radius: var(--r-sm);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-2);
}

.tool-driver i { color: var(--accent-light); margin-top: 3px; flex-shrink: 0; }
.tool-driver strong { color: var(--text-1); }

/* Validation / warning messages */
.tool-msg {
  display: flex;
  gap: 11px;
  padding: 13px 15px;
  margin-top: 14px;
  border-radius: var(--r-sm);
  font-size: 0.82rem;
  line-height: 1.6;
  border: 1px solid;
}

.tool-msg i { margin-top: 3px; flex-shrink: 0; }
.tool-msg-list { display: flex; flex-direction: column; gap: 10px; }
.tool-msg-list:empty { display: none; }

.tool-msg--warn {
  color: var(--text-2);
  background: rgba(224, 168, 66, 0.1);
  border-color: rgba(224, 168, 66, 0.35);
}
.tool-msg--warn i { color: #e0a842; }

.tool-msg--error {
  color: var(--text-2);
  background: rgba(224, 82, 82, 0.1);
  border-color: rgba(224, 82, 82, 0.35);
}
.tool-msg--error i { color: #e05252; }

.tool-msg--info {
  color: var(--text-2);
  background: var(--bg-3);
  border-color: var(--border-1);
}
.tool-msg--info i { color: var(--accent-light); }

.tool-msg strong { color: var(--text-1); font-weight: 600; }

/* ── Safety disclaimer ─────────────────────────────────────── */
.tool-disclaimer {
  display: flex;
  gap: 13px;
  padding: 16px 18px;
  margin-top: 20px;
  background: rgba(224, 82, 82, 0.07);
  border: 1px solid rgba(224, 82, 82, 0.3);
  border-inline-start: 3px solid #e05252;
  border-radius: var(--r-sm);
}

.tool-disclaimer > i { color: #e05252; font-size: 1.05rem; margin-top: 2px; flex-shrink: 0; }

.tool-disclaimer-title {
  font-family: var(--font-heading);
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 5px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.tool-disclaimer p { font-size: 0.82rem; line-height: 1.65; color: var(--text-2); }

/* ── Standards / method sidebar ────────────────────────────── */
.tool-standards { margin-top: 22px; }

.tool-std-list { display: flex; flex-direction: column; gap: 15px; }

.tool-std-item { display: flex; gap: 12px; }

.tool-std-badge {
  flex-shrink: 0;
  padding: 4px 10px;
  font-family: var(--font-heading);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--accent-light);
  background: var(--accent-dim);
  border: 1px solid var(--border-2);
  border-radius: var(--r-sm);
  white-space: nowrap;
  height: fit-content;
}

.tool-std-text { font-size: 0.82rem; line-height: 1.6; color: var(--text-2); }
.tool-std-text strong { color: var(--text-1); font-weight: 600; }

/* ── Long-form explainer ───────────────────────────────────── */
.tool-explainer { background: var(--bg-1); padding: 72px 0; }

.tool-prose { max-width: 76ch; margin: 0 auto; }

.tool-prose h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--text-1);
  margin: 44px 0 16px;
}

.tool-prose h2:first-child { margin-top: 0; }

.tool-prose h3 {
  font-family: var(--font-heading);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-1);
  margin: 28px 0 11px;
}

.tool-prose p {
  color: var(--text-2);
  font-size: 0.97rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.tool-prose ul, .tool-prose ol {
  margin: 0 0 18px;
  padding-inline-start: 22px;
  list-style: disc;
}

.tool-prose ol { list-style: decimal; }

.tool-prose li {
  color: var(--text-2);
  font-size: 0.97rem;
  line-height: 1.75;
  margin-bottom: 9px;
  padding-inline-start: 4px;
}

.tool-prose strong { color: var(--text-1); font-weight: 600; }

.tool-prose code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  font-size: 0.87em;
  padding: 2px 7px;
  background: var(--bg-3);
  border: 1px solid var(--border-1);
  border-radius: 5px;
  color: var(--accent-light);
  direction: ltr;
  unicode-bidi: embed;
  display: inline-block;
}

.tool-formula {
  padding: 16px 20px;
  margin: 0 0 20px;
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-inline-start: 3px solid var(--accent);
  border-radius: var(--r-sm);
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  font-size: 0.87rem;
  line-height: 1.9;
  color: var(--text-1);
  direction: ltr;
  text-align: left;
  overflow-x: auto;
}

.tool-prose-table-wrap { overflow-x: auto; margin-bottom: 22px; }

.tool-prose-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.87rem;
  min-width: 460px;
}

.tool-prose-table th {
  text-align: start;
  padding: 11px 14px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
  background: var(--bg-2);
  border-bottom: 1px solid var(--border-2);
}

.tool-prose-table td {
  padding: 11px 14px;
  color: var(--text-2);
  border-bottom: 1px solid var(--border-1);
  vertical-align: top;
}

.tool-prose-table tbody tr:last-child td { border-bottom: none; }
.tool-prose-table td strong { color: var(--text-1); }

/* FAQ */
.tool-faq { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }

.tool-faq-item {
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.tool-faq-item > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 19px;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-1);
  list-style: none;
  transition: color var(--t-fast);
}

.tool-faq-item > summary::-webkit-details-marker { display: none; }
.tool-faq-item > summary:hover { color: var(--accent-light); }
.tool-faq-item > summary i { color: var(--text-3); font-size: 0.8rem; flex-shrink: 0; transition: transform var(--t-fast); }
.tool-faq-item[open] > summary i { transform: rotate(180deg); }
.tool-faq-item[open] > summary { color: var(--accent-light); }

.tool-faq-body { padding: 0 19px 18px; }
.tool-faq-body p { font-size: 0.9rem; line-height: 1.75; color: var(--text-2); margin-bottom: 12px; }
.tool-faq-body p:last-child { margin-bottom: 0; }

/* ── Quote CTA ─────────────────────────────────────────────── */
.tool-cta-section { background: var(--bg-2); padding: 64px 0; border-top: 1px solid var(--border-1); }

.tool-cta-card {
  background: var(--bg-1);
  border: 1px solid var(--border-1);
  border-radius: var(--r-lg);
  padding: 42px;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 38px;
  align-items: center;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.tool-cta-card::before {
  content: '';
  position: absolute;
  top: -60%;
  inset-inline-end: -6%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%);
  pointer-events: none;
}

@media (max-width: 860px) {
  .tool-cta-card { grid-template-columns: minmax(0, 1fr); padding: 30px; gap: 26px; }
}

.tool-cta-content { position: relative; z-index: 1; }

.tool-cta-card h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 3vw, 1.95rem);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--text-1);
  margin-bottom: 13px;
}

.tool-cta-card p { color: var(--text-2); font-size: 0.95rem; line-height: 1.75; margin-bottom: 22px; }

.tool-cta-actions { display: flex; gap: 12px; flex-wrap: wrap; position: relative; z-index: 1; }

.tool-cta-actions .btn-primary,
.tool-cta-actions .btn-ghost { justify-content: center; }

.tool-cta-side { position: relative; z-index: 1; }

.tool-cta-points { display: flex; flex-direction: column; gap: 14px; }

.tool-cta-point { display: flex; gap: 12px; align-items: flex-start; font-size: 0.88rem; line-height: 1.6; color: var(--text-2); }

.tool-cta-point i {
  color: var(--accent-light);
  margin-top: 4px;
  flex-shrink: 0;
  font-size: 0.82rem;
}

.tool-cta-point strong { color: var(--text-1); font-weight: 600; display: block; margin-bottom: 2px; }

/* ── Related tools ─────────────────────────────────────────── */
.tool-related-section { background: var(--bg-1); padding: 64px 0 80px; }

.tool-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 16px;
  margin-top: 30px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 22px;
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-radius: var(--r-md);
  transition: transform var(--t-fast), border-color var(--t-fast), box-shadow var(--t-fast);
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-card);
}

.tool-card-icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  background: var(--accent-dim);
  color: var(--accent-light);
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.tool-card-title { font-family: var(--font-heading); font-size: 1rem; font-weight: 700; color: var(--text-1); }
.tool-card-desc { font-size: 0.84rem; line-height: 1.6; color: var(--text-2); }

.tool-card-soon {
  align-self: flex-start;
  margin-top: 4px;
  padding: 3px 9px;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  border: 1px solid var(--border-2);
  border-radius: var(--r-full);
}

.tool-card--soon { opacity: 0.62; pointer-events: none; }

/* ── Print ─────────────────────────────────────────────────── */
@media print {
  .navbar, .footer, .tool-cta-section, .tool-related-section,
  .tool-actions, .tool-table-actions, .tool-row-del, .tool-hero::before { display: none !important; }
  .tool-layout { grid-template-columns: 1fr; }
  .tool-result-panel { position: static; break-inside: avoid; }
  .tool-panel, .tool-result-panel { box-shadow: none; border-color: #ccc; }
  .tool-explainer { display: none; }
  body { background: #fff; }
}

/* ── RTL: element-scoped so it survives main.js resetting <html dir> ── */
[dir="rtl"] .tool-hero h1,
[dir="rtl"] .tool-hero-desc,
[dir="rtl"] .tool-prose,
[dir="rtl"] .tool-panel,
[dir="rtl"] .tool-result-panel,
[dir="rtl"] .tool-cta-card,
[dir="rtl"] .tool-related-grid { text-align: right; }

[dir="rtl"] .tool-breadcrumb i { transform: scaleX(-1); }
[dir="rtl"] .tool-driver i,
[dir="rtl"] .tool-msg i,
[dir="rtl"] .tool-disclaimer > i { transform: none; }
[dir="rtl"] .btn-primary i.fa-arrow-right,
[dir="rtl"] .tool-cta-actions i.fa-arrow-right { transform: scaleX(-1); }

/* Keep numbers, units and formulas readable inside RTL text */
[dir="rtl"] .tool-result-value,
[dir="rtl"] .tool-break-val,
[dir="rtl"] .tool-input[type="number"] {
  direction: ltr;
  unicode-bidi: embed;
}

[dir="rtl"] .tool-result-value { text-align: right; }
[dir="rtl"] .tool-break-val { text-align: left; }
[dir="rtl"] .tool-input[type="number"] { text-align: left; }
[dir="rtl"] .tool-table thead th,
[dir="rtl"] .tool-prose-table th { text-align: right; }