.rvb-calc {
  --rvb-paper: #F6F4EC;
  --rvb-ink: #1B1B18;
  --rvb-ink-soft: #5B5A52;
  --rvb-navy: #16283F;
  --rvb-blue: #3C6E91;
  --rvb-blue-line: rgba(60, 110, 145, 0.35);
  --rvb-brass: #B98B3E;
  --rvb-brass-dark: #8A6526;
  --rvb-buy: #B98B3E;
  --rvb-rent: #3C6E91;
  --rvb-radius: 10px;
  background: var(--rvb-paper);
  color: var(--rvb-ink);
  font-family: 'Inter', sans-serif;
  padding: 28px;
  border: 1px solid rgba(27,27,24,0.1);
  border-radius: var(--rvb-radius);
  max-width: 960px;
  margin: 0 auto;
  box-sizing: border-box;
}
.rvb-calc *, .rvb-calc *::before, .rvb-calc *::after { box-sizing: border-box; }

.rvb-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  border-bottom: 1px dashed var(--rvb-blue-line);
  padding-bottom: 16px;
  margin-bottom: 20px;
}
.rvb-eyebrow {
  font-family: 'Fraunces', serif;
  font-weight: 600;
  font-size: 22px;
  margin: 0;
  letter-spacing: 0.01em;
}
.rvb-toggle {
  display: inline-flex;
  border: 1px solid var(--rvb-navy);
  border-radius: 999px;
  overflow: hidden;
}
.rvb-toggle-btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: transparent;
  border: none;
  padding: 9px 16px;
  cursor: pointer;
  color: var(--rvb-navy);
}
.rvb-toggle-btn.is-active {
  background: var(--rvb-navy);
  color: #F6F4EC;
}

.rvb-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 28px;
}
@media (max-width: 720px) {
  .rvb-grid { grid-template-columns: 1fr; }
}

.rvb-sheet {
  background: transparent;
}
.rvb-field {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px dotted rgba(27,27,24,0.18);
}
.rvb-field label {
  font-size: 13.5px;
  color: var(--rvb-ink-soft);
}
.rvb-input-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  background: #fff;
  border: 1px solid rgba(27,27,24,0.15);
  border-radius: 6px;
  padding: 6px 10px;
  min-width: 108px;
}
.rvb-input-wrap input[type="number"] {
  border: none;
  outline: none;
  width: 72px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  text-align: right;
  background: transparent;
  color: var(--rvb-ink);
}
.rvb-prefix, .rvb-suffix {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--rvb-ink-soft);
}
.rvb-slider-wrap {
  min-width: 180px;
  background: none;
  border: none;
  padding: 0;
  gap: 10px;
}
.rvb-slider-wrap input[type="range"] {
  flex: 1;
  accent-color: var(--rvb-brass);
}
.rvb-slider-out {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  min-width: 20px;
  text-align: right;
}

.rvb-advanced {
  margin-top: 14px;
}
.rvb-advanced summary {
  cursor: pointer;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--rvb-blue);
  padding: 8px 0;
}

.rvb-result {
  background: var(--rvb-navy);
  border-radius: var(--rvb-radius);
  padding: 22px;
  color: #F6F4EC;
  background-image:
    linear-gradient(rgba(246,244,236,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(246,244,236,0.06) 1px, transparent 1px);
  background-size: 24px 24px;
}
.rvb-result-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}
.rvb-stat-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(246,244,236,0.6);
  margin: 0 0 4px;
}
.rvb-stat-value {
  font-family: 'Fraunces', serif;
  font-weight: 500;
  font-size: 34px;
  margin: 0;
  color: #F6F4EC;
}
.rvb-verdict {
  font-size: 13px;
  color: rgba(246,244,236,0.75);
  max-width: 220px;
  text-align: right;
}

.rvb-legend {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: rgba(246,244,236,0.75);
  margin-bottom: 8px;
}
.rvb-legend-item { display: flex; align-items: center; gap: 6px; }
.rvb-dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.rvb-dot-buy { background: var(--rvb-buy); }
.rvb-dot-rent { background: var(--rvb-rent); }

.rvb-chart-wrap {
  position: relative;
  height: 220px;
  background: rgba(246,244,236,0.03);
  border: 1px solid rgba(246,244,236,0.12);
  border-radius: 8px;
  padding: 8px;
}

.rvb-breakdown {
  margin-top: 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
}
.rvb-breakdown-item {
  background: rgba(246,244,236,0.06);
  border-radius: 6px;
  padding: 10px 12px;
}
.rvb-breakdown-item span {
  display: block;
  color: rgba(246,244,236,0.6);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.rvb-select {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  background: #fff;
  border: 1px solid rgba(27,27,24,0.15);
  border-radius: 6px;
  padding: 7px 8px;
  color: var(--rvb-ink);
  min-width: 160px;
}

.rvb-info {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  color: var(--rvb-blue);
  font-size: 12px;
  cursor: help;
  margin-left: 2px;
  outline: none;
}
.rvb-info:hover::after,
.rvb-info:focus::after {
  content: attr(data-tip);
  position: absolute;
  bottom: 130%;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  background: var(--rvb-navy);
  color: #F6F4EC;
  font-family: 'Inter', sans-serif;
  font-size: 11.5px;
  line-height: 1.4;
  padding: 8px 10px;
  border-radius: 6px;
  z-index: 20;
  text-align: left;
}

.rvb-stat-value {
  font-family: 'Fraunces', serif;
  font-weight: 600;
  font-size: 42px;
  margin: 6px 0 4px;
  color: var(--rvb-brass);
}
.rvb-verdict {
  font-size: 13px;
  color: rgba(246,244,236,0.8);
  margin: 0;
}

.rvb-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  flex-wrap: wrap;
}
.rvb-btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11.5px;
  letter-spacing: 0.02em;
  background: rgba(246,244,236,0.08);
  border: 1px solid rgba(246,244,236,0.25);
  color: #F6F4EC;
  padding: 9px 14px;
  border-radius: 6px;
  cursor: pointer;
}
.rvb-btn:hover { background: rgba(246,244,236,0.14); }
.rvb-btn.is-done { border-color: var(--rvb-brass); color: var(--rvb-brass); }