/* ============================================================
   LeefH2™ Calculator-specific styles
   Cards, inputs, engine rows, metrics, charts, tables
============================================================ */

.calculator-area {
  background: #FFFFFF;
  padding: 56px 0;
}

/* ============================================================
   STEP INDICATOR
============================================================ */

.step-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 40px;
  flex-wrap: nowrap;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  min-width: 90px;
}

.step-circle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-green-primary);
  color: #FFFFFF;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid var(--color-green-light);
  box-shadow: 0 0 0 2px var(--color-green-primary);
}

.step-label {
  margin-top: 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.step-line {
  flex: 1;
  max-width: 120px;
  height: 2px;
  background: var(--color-green-primary);
  margin: 0 8px 30px;
  align-self: center;
  opacity: 0.5;
}

/* ============================================================
   CALCULATOR CARDS
============================================================ */

.calc-card {
  background: #FFFFFF;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 28px 32px;
  margin-bottom: 24px;
  border-left-width: 4px;
  border-left-style: solid;
}

.calc-card--green { border-left-color: var(--color-green-primary); }
.calc-card--blue  { border-left-color: var(--color-blue-brand); }
.calc-card--orange { border-left-color: var(--color-orange-brand); }

.calc-card__head { margin-bottom: 22px; }

.card-eyebrow {
  font-family: var(--font-primary);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-green-primary);
  margin-bottom: 6px;
}

.card-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
  margin: 0 0 6px;
  line-height: 1.2;
}

.card-subtitle {
  font-size: 14px;
  color: var(--color-text-muted);
  margin: 0;
}

/* ============================================================
   FORM ELEMENTS
============================================================ */

.form-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.form-label > i:first-child {
  color: var(--color-green-primary);
  font-size: 14px;
}
.help-icon {
  color: var(--color-text-hint);
  font-size: 13px;
  cursor: help;
  margin-left: auto;
  transition: var(--transition-fast);
}
.help-icon:hover { color: var(--color-green-primary); }

.form-control,
.form-select {
  background: var(--color-bg-input);
  border: 1px solid var(--color-border-input);
  color: var(--color-text-primary);
  border-radius: var(--radius-sm);
  font-size: 14px;
  padding: 10px 12px;
  transition: var(--transition-fast);
}
.form-control:focus,
.form-select:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(30, 122, 46, 0.12);
  outline: none;
}

.input-group-text {
  background: #F4F6F4;
  border-color: var(--color-border-input);
  color: var(--color-text-body);
  font-weight: 600;
  font-size: 14px;
}

.form-hint {
  font-size: 11px;
  font-weight: 400;
  color: var(--color-text-hint);
  line-height: 1.5;
  margin-top: 6px;
}

.info-alert {
  background: var(--color-success-bg);
  border: 1px solid var(--color-success-border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-top: 8px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 11px;
  color: var(--color-green-primary);
  line-height: 1.5;
}
.info-alert i {
  color: var(--color-green-primary);
  margin-top: 1px;
  font-size: 13px;
  flex-shrink: 0;
}

/* ============================================================
   RANGE SLIDER (custom)
============================================================ */

.brand-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: linear-gradient(to right,
    var(--color-green-primary) 0%,
    var(--color-green-primary) var(--slider-fill, 50%),
    #E0E0E0 var(--slider-fill, 50%),
    #E0E0E0 100%);
  border-radius: var(--radius-pill);
  outline: none;
  margin-top: 10px;
  cursor: pointer;
}

.brand-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-green-primary);
  border: 2px solid #FFFFFF;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  cursor: pointer;
  transition: var(--transition-fast);
}
.brand-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 4px 12px rgba(30,122,46,0.35);
}

.brand-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-green-primary);
  border: 2px solid #FFFFFF;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  cursor: pointer;
  transition: var(--transition-fast);
}
.brand-slider::-moz-range-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 4px 12px rgba(30,122,46,0.35);
}

/* ============================================================
   ENGINE ROWS
============================================================ */

.engine-row {
  background: var(--color-bg-engine-row);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin-bottom: 14px;
  transition: var(--transition-med);
}

.engine-row:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-green-light);
}

.engine-row__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  gap: 12px;
  flex-wrap: wrap;
}

.engine-row__title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.category-pill {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  color: #FFFFFF;
  white-space: nowrap;
}
.category-pill.cat-marine { background: #3A72B5; }
.category-pill.cat-mining { background: #F5A623; }
.category-pill.cat-rail { background: #7C3AED; }
.category-pill.cat-power { background: #1E7A2E; }
.category-pill.cat-oilgas { background: #4A4A4A; }
.category-pill.cat-military { background: #0D1F0F; }
.category-pill.cat-other { background: #888888; }
.category-pill.cat-custom {
  background: transparent;
  color: var(--color-green-primary);
  border: 1px solid var(--color-green-primary);
}

.remove-row-btn {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--color-border-default);
  color: var(--color-text-muted);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.remove-row-btn:hover {
  background: var(--color-danger-bg);
  border-color: var(--color-danger-border);
  color: var(--color-danger-text);
}

.engine-row__field-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 6px;
  display: block;
}

/* Unit input group */
.unit-input-group .btn-step {
  background: #FFFFFF;
  border: 1px solid var(--color-border-input);
  color: var(--color-text-body);
  font-weight: 700;
  font-size: 16px;
  width: 38px;
  transition: var(--transition-fast);
}
.unit-input-group .btn-step:hover {
  background: var(--color-green-light);
  border-color: var(--color-green-primary);
  color: var(--color-green-primary);
}
.unit-input-group .form-control {
  text-align: center;
  font-weight: 600;
}

.fuel-readonly {
  background: #F0F0F0 !important;
  color: var(--color-text-body) !important;
  cursor: not-allowed;
  font-weight: 500;
}

/* Add engine button */
.btn-add-engine {
  background: transparent;
  border: 2px dashed var(--color-green-primary);
  color: var(--color-green-primary);
  font-weight: 600;
  padding: 14px;
  transition: var(--transition-med);
}
.btn-add-engine:hover {
  background: var(--color-green-light);
  border-color: var(--color-green-primary);
  border-style: solid;
  color: var(--color-green-primary);
}
.btn-add-engine:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  border: 2px dashed var(--color-border-default);
  border-radius: var(--radius-md);
  background: var(--color-bg-engine-row);
  margin-bottom: 14px;
}
.empty-state__icon {
  font-size: 48px;
  color: var(--color-border-input);
  margin-bottom: 16px;
}
.empty-state__text {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}
.btn-add-engine-empty {
  background: var(--color-green-primary);
  border-color: var(--color-green-primary);
  color: #FFFFFF;
  font-weight: 600;
  padding: 10px 24px;
}

/* ============================================================
   RESULTS — PERIOD TOGGLE
============================================================ */

.period-toggle {
  display: inline-flex;
  background: var(--color-bg-section);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-pill);
  padding: 4px;
  margin-bottom: 24px;
  gap: 0;
}

.period-btn {
  border: none;
  background: transparent;
  color: var(--color-text-body);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
}
.period-btn:hover { color: var(--color-green-primary); }
.period-btn.active {
  background: var(--color-green-primary);
  color: #FFFFFF;
}

/* ============================================================
   METRIC CARDS
============================================================ */

.metrics-row { margin-bottom: 8px; }

.metric-card {
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  border: 1px solid var(--color-border-default);
  transition: var(--transition-fast);
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
}

.metric-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.metric-icon {
  font-size: 22px;
  margin-bottom: 10px;
}

.metric-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 8px;
}

.metric-value {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
  word-break: break-all;
}

.metric-sub {
  font-size: 11px;
  font-weight: 500;
  line-height: 1.3;
}

/* Standard metric */
.metric-card--standard {
  background: var(--color-bg-section);
}
.metric-card--standard .metric-icon { color: var(--color-text-muted); }
.metric-card--standard .metric-label { color: var(--color-text-muted); }
.metric-card--standard .metric-value { color: var(--color-text-primary); }
.metric-card--standard .metric-sub { color: var(--color-text-hint); }

/* Success metric */
.metric-card--success {
  background: var(--color-success-bg);
  border: 1.5px solid var(--color-success-border);
}
.metric-card--success .metric-icon { color: var(--color-green-primary); }
.metric-card--success .metric-label { color: var(--color-green-medium); }
.metric-card--success .metric-value { color: var(--color-green-primary); }
.metric-card--success .metric-sub { color: var(--color-green-medium); }

/* Dark metric */
.metric-card--dark {
  background: linear-gradient(135deg, #0D1F0F 0%, #1E3A1E 100%);
  border: 1.5px solid var(--color-green-medium);
}
.metric-card--dark .metric-icon { color: var(--color-green-medium); }
.metric-card--dark .metric-label { color: var(--color-green-medium); }
.metric-card--dark .metric-value { color: #FFFFFF; }
.metric-card--dark .metric-sub { color: var(--color-green-medium); }

/* ============================================================
   SECTION DIVIDER
============================================================ */
.section-divider {
  height: 1px;
  background: var(--color-border-default);
  margin: 28px 0;
  border: none;
}

.subsection-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 16px;
}

/* ============================================================
   CHART TABS
============================================================ */

.chart-tabs {
  border-bottom: 1px solid var(--color-border-default);
  margin-bottom: 16px;
}
.chart-tabs .nav-link {
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 600;
  border: none;
  padding: 10px 18px;
  border-bottom: 2px solid transparent;
  background: transparent;
}
.chart-tabs .nav-link i { margin-right: 6px; }
.chart-tabs .nav-link:hover {
  color: var(--color-green-primary);
  border-color: transparent;
}
.chart-tabs .nav-link.active {
  color: var(--color-green-primary);
  background: transparent;
  border-color: var(--color-green-primary);
}

.chart-wrap {
  position: relative;
  width: 100%;
  margin-top: 16px;
}
.chart-wrap--bar { height: 280px; }
.chart-wrap--line { height: 240px; }

/* ============================================================
   BREAKDOWN TABLE
============================================================ */

.breakdown-header { margin-bottom: 12px; }

.breakdown-note {
  font-size: 11px;
  color: var(--color-text-muted);
}

.breakdown-table {
  font-size: 13px;
  margin-bottom: 0;
}

.breakdown-table thead th {
  background: var(--color-bg-section);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  padding: 12px 14px;
  border-bottom: 2px solid var(--color-border-default);
  border-top: none;
}

.breakdown-table tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid #F0F0F0;
  vertical-align: middle;
  color: var(--color-text-body);
}

.breakdown-table tbody tr:hover td {
  background: #F8FAF8;
}

.breakdown-table .usd-cell {
  color: var(--color-green-primary);
  font-weight: 600;
}

.pm-badge {
  display: inline-block;
  background: var(--color-success-bg);
  color: var(--color-success-text);
  border: 1px solid var(--color-success-border);
  border-radius: var(--radius-pill);
  padding: 3px 12px;
  font-size: 11px;
  font-weight: 600;
}

.breakdown-table tfoot tr {
  background: var(--color-green-dark);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 14px;
}
.breakdown-table tfoot td {
  background: var(--color-green-dark) !important;
  color: #FFFFFF;
  padding: 14px;
  border: none;
}
.breakdown-table tfoot .usd-cell {
  color: var(--color-green-medium) !important;
}

/* ============================================================
   ENVIRONMENTAL IMPACT
============================================================ */

.env-card {
  background: #F8FAF8;
  border: 1px solid #E8E8E8;
  border-radius: var(--radius-md);
  padding: 18px 16px;
  text-align: center;
  height: 100%;
}
.env-pct {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}
.env-pct--green { color: var(--color-green-primary); }
.env-pct--blue { color: var(--color-blue-brand); }

.env-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-body);
  margin-bottom: 4px;
}
.env-before-after {
  font-size: 11px;
  color: var(--color-text-hint);
  margin-bottom: 4px;
}
.env-note {
  font-size: 10px;
  color: #BBBBBB;
}

/* ============================================================
   EXPORT BUTTONS
============================================================ */
.export-buttons .btn {
  padding: 10px 22px;
}
.export-buttons .btn i { margin-right: 6px; }

/* ============================================================
   DISCLAIMER
============================================================ */
.disclaimer {
  border-top: 1px solid var(--color-border-default);
  padding-top: 20px;
  margin-top: 28px;
  font-size: 11px;
  color: var(--color-text-hint);
  line-height: 1.6;
  margin-bottom: 0;
}