/* ==========================================================================
   FreightDock Math - Calculator Apparatus & Dynamic SVG Visualizers
   Engineering-grade UI with zero latency and immediate top-300px render
   ========================================================================== */

/* Main Calculator Card Container */
.calculator-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-structural);
  border-top: 3px solid var(--accent-navy);
  border-radius: var(--radius-card);
  padding: 20px;
  box-shadow: var(--shadow-industrial);
}

.calc-grid-inner {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 20px;
}

@media (max-width: 768px) {
  .calc-grid-inner {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------------
   INPUT CONTROLS & INDUSTRIAL FIELD STYLING
   -------------------------------------------------------------------------- */
.input-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-subtle);
}

.input-section-header h2,
.input-section-header h3 {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-ink);
  margin: 0;
}

.form-group-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 12px;
}

.form-group-row.quad {
  grid-template-columns: repeat(4, 1fr);
}

.form-group-row.dual {
  grid-template-columns: 1fr 1fr;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  justify-content: space-between;
}

.form-label span.unit {
  color: var(--accent-orange);
  font-weight: 700;
}

.input-with-unit {
  position: relative;
  display: flex;
  align-items: center;
}

.form-control {
  width: 100%;
  padding: 8px 10px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-ink);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-sharp);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
  border-color: var(--accent-orange);
  box-shadow: 0 0 0 2px rgba(234, 88, 12, 0.15);
}

select.form-control {
  appearance: auto;
  cursor: pointer;
  padding-right: 24px;
  font-size: 0.88rem;
}

/* Quick Dimension Preset Buttons */
.preset-pills-row {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.btn-preset {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-structural);
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 2px;
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.15s ease;
}

.btn-preset:hover,
.btn-preset.active {
  background-color: var(--text-ink);
  color: #FFFFFF;
  border-color: var(--text-ink);
}

/* Toggles & Checkboxes */
.toggle-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 10px 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
}

.toggle-row input[type="checkbox"] {
  accent-color: var(--accent-orange);
  width: 15px;
  height: 15px;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   LIVE RESULTS APPARATUS (RIGHT COLUMN)
   -------------------------------------------------------------------------- */
.live-results-panel {
  background-color: #FAFAF9;
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-sharp);
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.results-badge-strip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.primary-class-callout {
  background-color: #FFFFFF;
  border: 2px solid var(--text-ink);
  border-radius: var(--radius-sharp);
  padding: 12px 14px;
  text-align: center;
  margin-bottom: 14px;
  box-shadow: var(--shadow-industrial);
}

.primary-class-callout .subhead {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 700;
}

.primary-class-callout .class-number {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-navy);
  line-height: 1.1;
  margin: 2px 0;
}

.primary-class-callout .tier-subtext {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-orange);
  font-weight: 600;
}

/* Key Metrics 2x2 Grid */
.metrics-quad-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}

.metric-cell {
  background-color: #FFFFFF;
  border: 1px solid var(--border-structural);
  padding: 8px 10px;
  border-radius: 2px;
}

.metric-cell .metric-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.metric-cell .metric-value {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-ink);
}

/* Optimization Alert Box */
.optimization-box {
  background-color: var(--accent-green-bg);
  border: 1px solid rgba(21, 128, 61, 0.3);
  border-left: 3px solid var(--accent-green);
  padding: 10px 12px;
  border-radius: 2px;
  font-size: 0.76rem;
  margin-bottom: 12px;
}

.optimization-box h4 {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--accent-green);
  margin-bottom: 2px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.optimization-box p {
  margin: 0;
  color: #14532D;
  line-height: 1.4;
}

/* --------------------------------------------------------------------------
   DYNAMIC SVG VISUALIZER STYLES
   -------------------------------------------------------------------------- */
.visualizer-container {
  background-color: #FFFFFF;
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-sharp);
  padding: 12px;
  margin-top: 10px;
  position: relative;
}

.visualizer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  border-bottom: 1px dashed var(--border-subtle);
  padding-bottom: 4px;
}

.visualizer-svg-wrap {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #FBFBFA;
  border: 1px solid #ECEBE6;
  border-radius: 2px;
  padding: 6px;
  min-height: 150px;
}

.visualizer-svg-wrap svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Overhang Warning Banner in SVG */
.overhang-warning-strip {
  background-color: var(--accent-red-bg);
  border: 1px solid rgba(220, 38, 38, 0.35);
  border-radius: 2px;
  padding: 8px 12px;
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--accent-red);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   TRAILER VISUALIZER STYLES (53-FT / 48-FT / BOX TRUCK)
   -------------------------------------------------------------------------- */
.trailer-controls-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.trailer-visual-viewport {
  background-color: #27272A;
  border: 2px solid #18181B;
  border-radius: var(--radius-sharp);
  padding: 16px;
  overflow-x: auto;
  margin: 16px 0;
}

.trailer-blueprint-svg {
  width: 100%;
  min-width: 760px;
  height: auto;
  display: block;
}

.trailer-stats-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-structural);
  padding: 12px 16px;
  border-radius: var(--radius-sharp);
  margin-top: 12px;
}

.trailer-stats-strip .stat-item {
  font-family: var(--font-mono);
}

.trailer-stats-strip .stat-label {
  display: block;
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.trailer-stats-strip .stat-val {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-ink);
}

/* --------------------------------------------------------------------------
   ACCESSORIAL MATRIX & ITEMIZATION STYLES
   -------------------------------------------------------------------------- */
.accessorial-checklist-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  max-height: 380px;
  overflow-y: auto;
  padding-right: 6px;
}

.accessorial-item-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-sharp);
  padding: 10px 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.accessorial-item-card:hover {
  border-color: var(--accent-orange);
  background-color: #FFFBF7;
}

.accessorial-item-card.selected {
  border-color: var(--accent-orange);
  border-left: 3px solid var(--accent-orange);
  background-color: var(--bg-tint-orange);
}

.accessorial-item-info {
  flex: 1;
}

.accessorial-item-info .title {
  display: block;
  font-family: var(--font-body);
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--text-ink);
}

.accessorial-item-info .rate-hint {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-navy);
  font-weight: 600;
}

.accessorial-item-info .desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
  line-height: 1.35;
}

/* Dynamic Waterfall Bar */
.waterfall-bar-container {
  margin: 14px 0;
  background-color: #FFFFFF;
  border: 1px solid var(--border-structural);
  padding: 12px;
  border-radius: 2px;
}

.waterfall-bar-track {
  height: 28px;
  background-color: var(--bg-subtle);
  display: flex;
  border-radius: 2px;
  overflow: hidden;
  border: 1px solid var(--border-structural);
}

.waterfall-segment {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  transition: width 0.3s ease;
  overflow: hidden;
  white-space: nowrap;
}

.waterfall-segment.linehaul {
  background-color: var(--accent-navy);
}

.waterfall-segment.accessorial {
  background-color: var(--accent-orange);
}

.waterfall-legend {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
}