:root {
  --dms-savings-calculator-bg-body:   #eef2f7;
  --dms-savings-calculator-bg-panel:  #ffffff;
  --dms-savings-calculator-bg-chart:  #f7f9fc;
  --dms-savings-calculator-bg-input:  #f0f4f9;
  --dms-savings-calculator-border:    rgba(6,111,209,0.12);
  --dms-savings-calculator-border-hi: #066fd1;

  --dms-savings-calculator-text-1: #0d1f36;
  --dms-savings-calculator-text-2: #4a637e;
  --dms-savings-calculator-text-3: #93aabf;

  --dms-savings-calculator-blue:      #066fd1;
  --dms-savings-calculator-blue-dim:  rgba(6,111,209,0.08);
  --dms-savings-calculator-green:     #14BE7A;
  --dms-savings-calculator-green-dim: rgba(10,124,78,0.08);
  --dms-savings-calculator-radius:    10px;
  --dms-savings-calculator-trans:     0.18s ease;
  --dms-savings-calculator-font:      'DM Sans', system-ui, sans-serif;
}

/* ── Calculator Shell ──────────────────────────────────────────── */
.calculator {
  display: flex;
  width: 100%;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--dms-savings-calculator-border);
  box-shadow: 0 8px 40px rgba(6,111,209,0.1), 0 2px 8px rgba(0,0,0,0.06);
}

/* ── Left Panel ────────────────────────────────────────────────── */
.calc-panel {
  width: 240px;
  flex-shrink: 0;
  background: var(--dms-savings-calculator-bg-panel);
  border-right: 1px solid var(--dms-savings-calculator-border);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.panel-logo {
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--dms-savings-calculator-text-1);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--dms-savings-calculator-border);
}

.panel-logo .dot { color: var(--dms-savings-calculator-blue); }

.panel-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.section-title {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dms-savings-calculator-text-3);
}

/* Tier List */
.tier-list { display: flex; flex-direction: column; gap: 6px; }

.tier-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  border-radius: var(--dms-savings-calculator-radius);
  border: 1.5px solid var(--dms-savings-calculator-border);
  background: var(--dms-savings-calculator-bg-input);
  cursor: pointer;
  transition: all var(--dms-savings-calculator-trans);
  user-select: none;
}

.tier-option:hover { border-color: rgba(6,111,209,0.25); background: #e6eff9; }

.tier-option.selected {
  border-color: var(--dms-savings-calculator-border-hi);
  background: var(--dms-savings-calculator-blue-dim);
}

.tier-option-left {
  display: flex;
  align-items: center;
  gap: 9px;
}

.tier-radio {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid var(--dms-savings-calculator-text-3);
  position: relative;
  flex-shrink: 0;
  transition: all var(--dms-savings-calculator-trans);
}

.tier-option.selected .tier-radio {
  border-color: var(--dms-savings-calculator-blue);
  background: var(--dms-savings-calculator-blue);
}

.tier-option.selected .tier-radio::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 5px; height: 5px;
  border-radius: 50%;
  background: #fff;
}

.tier-name {
  font-size: 0.88rem;
  font-weight: 600;
}

.tier-price {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--dms-savings-calculator-text-2);
  text-align: right;
}

.tier-price .period {
  font-weight: 400;
  font-size: 0.68rem;
  color: var(--dms-savings-calculator-text-3);
}

/* Billing Toggle */
.billing-toggle {
  display: flex;
  gap: 4px;
  background: var(--dms-savings-calculator-bg-input);
  border: 1px solid var(--dms-savings-calculator-border);
  border-radius: var(--dms-savings-calculator-radius);
  padding: 4px;
}

.billing-toggle button {
  flex: 1;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--dms-savings-calculator-font);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--dms-savings-calculator-text-2);
  padding: 6px 4px;
  border-radius: 7px;
  transition: all var(--dms-savings-calculator-trans);
  white-space: nowrap;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.billing-toggle button.active {
  background: var(--dms-savings-calculator-blue);
  color: #fff;
}

.save-chip {
  font-size: 0.65rem;
  font-weight: 700;
  background: rgba(255,255,255,0.2);
  border-radius: 4px;
  padding: 1px 4px;
}

/* Competitor Checkboxes */
.competitor-list { display: flex; flex-direction: column; gap: 8px; }

.competitor-option {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
  padding: 2px 0;
}

.competitor-option input[type="checkbox"] { display: none; }

.comp-check {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  border: 1.5px solid var(--dms-savings-calculator-text-3);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--dms-savings-calculator-trans);
  position: relative;
}

.competitor-option.checked .comp-check {
  border-color: transparent;
}

.competitor-option.checked .comp-check::after {
  content: '';
  position: absolute;
  width: 5px; height: 8px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translate(-1px, -1px);
}

.comp-color-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.comp-name {
  font-size: 0.85rem;
  font-weight: 600;
  flex: 1;
}

.panel-description {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--dms-savings-calculator-border);
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--dms-savings-calculator-text-3);
}

/* ── Right Chart ───────────────────────────────────────────────── */
.calc-chart {
  flex: 1;
  background: var(--dms-savings-calculator-bg-chart);
  display: flex;
  flex-direction: column;
  padding: 20px 24px 20px;
  gap: 14px;
  min-width: 0;
}

/* Savings Rows */
.savings-rows {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.savings-row {
  background: var(--dms-savings-calculator-bg-input);
  border: 1px solid var(--dms-savings-calculator-border);
  border-radius: var(--dms-savings-calculator-radius);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
}

.savings-row-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dms-savings-calculator-text-3);
  display: flex;
  align-items: center;
  gap: 6px;
}

.savings-row-save-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: #686868;
  margin-top: 6px;
}

.savings-row-amount {
  font-size: 1.45rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--dms-savings-calculator-green);
  line-height: 1;
}

.savings-row-pct {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--dms-savings-calculator-text-3);
}

.savings-rows-empty {
  font-size: 0.82rem;
  color: var(--dms-savings-calculator-text-3);
  align-self: center;
  padding: 8px 0;
}

/* Chart */
.chart-wrap {
  flex: 1;
  position: relative;
  min-height: 0;
}

.chart-wrap canvas {
  display: block;
}

/* Slider */
.slider-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.slider-bound {
  font-size: 0.72rem;
  color: var(--dms-savings-calculator-text-3);
  white-space: nowrap;
  min-width: 28px;
}

.slider-track-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

input[type=range]#timeSlider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 99px;
  background: var(--dms-savings-calculator-border);
  outline: none;
  cursor: pointer;
}

input[type=range]#timeSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--dms-savings-calculator-blue);
  box-shadow: 0 0 0 4px rgba(6,111,209,0.18), 0 2px 8px rgba(6,111,209,0.3);
  cursor: grab;
  transition: box-shadow var(--dms-savings-calculator-trans);
}

input[type=range]#timeSlider::-webkit-slider-thumb:active { cursor: grabbing; }

.slider-marks {
  display: flex;
  justify-content: space-between;
  padding: 0 2px;
}

.slider-marks span {
  font-size: 0.64rem;
  color: var(--dms-savings-calculator-text-3);
}

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 680px) {
  body { padding: 0; align-items: stretch; }

  .calculator {
    flex-direction: column;
    border-radius: 0;
    min-height: 100dvh;
  }

  .calc-panel {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--dms-savings-calculator-border);
  }
}