.stack-analysis {
  margin: 32px auto 80px;
  padding: 28px 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.stack-analysis[hidden] { display: none; }

.stack-analysis-hint {
  margin: 0;
  padding: 4px 0;
  font-size: 14px;
  color: var(--muted);
  text-align: center;
}

.stack-analysis-title {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 0 0 20px;
}

.stack-metric {
  padding: 18px 0;
  border-top: 1px solid var(--border);
}

.stack-metric:first-of-type {
  border-top: none;
  padding-top: 0;
}

.stack-metric-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 12px;
}

.stack-metric-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 6px;
}

.stack-metric-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

.stack-metric-subtext {
  font-size: 12px;
  color: var(--muted);
  margin: 4px 0 0;
}

/* Usage intensity toggle */

.stack-usage-toggle {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin: 0 0 16px;
  padding: 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.stack-usage-option {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 7px;
  color: var(--muted);
  cursor: pointer;
  text-align: left;
  font: inherit;
  transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}

.stack-usage-option:hover {
  color: var(--text);
  background: var(--surface);
}

.stack-usage-option.is-active {
  background: var(--surface);
  border-color: var(--accent);
  color: var(--text);
}

.stack-usage-option-label {
  font-size: 13px;
  font-weight: 600;
}

.stack-usage-option.is-active .stack-usage-option-label {
  color: var(--accent);
}

.stack-usage-option-sub {
  font-size: 11px;
  color: var(--muted);
}

/* Custom usage panel */

.stack-usage-custom {
  margin: 0 0 16px;
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.stack-usage-custom-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 16px;
}

.stack-usage-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.stack-usage-field-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
}

.stack-usage-field-input {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 7px;
  transition: border-color 0.12s ease;
}

.stack-usage-field-input:focus-within {
  border-color: var(--accent);
}

.stack-usage-field-input input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: none;
  background: transparent;
  font: inherit;
  font-size: 13px;
  color: var(--text);
  padding: 0;
}

.stack-usage-field-input input::placeholder {
  color: var(--muted);
  font-style: italic;
}

.stack-usage-field-suffix {
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}

.stack-usage-custom-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
}

.stack-usage-custom-hint {
  font-size: 11px;
  color: var(--muted);
}

.stack-usage-custom-reset {
  padding: 4px 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: color 0.12s ease, border-color 0.12s ease;
}

.stack-usage-custom-reset:hover {
  color: var(--text);
  border-color: var(--accent);
}

/* Cost breakdown */

.stack-cost-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 16px;
  align-items: start;
}

.stack-cost-list {
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 20px;
  row-gap: 6px;
  margin: 0;
}

.stack-cost-list dt {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
}

.stack-cost-list dd {
  margin: 0;
  font-size: 13px;
  color: var(--text);
}

.stack-cost-list dd.is-muted {
  color: var(--muted);
}

.stack-cost-summary {
  padding: 14px 16px;
  background: var(--accent-soft);
  border-radius: 8px;
}

.stack-cost-figure {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 4px;
  flex-wrap: wrap;
}

.stack-cost-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.stack-cost-per {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  margin-right: 6px;
}

.stack-cost-band {
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--surface);
  color: var(--muted);
  border: 1px solid var(--border);
}

.stack-cost-band.band-low {
  color: #1f8a4c;
  border-color: rgba(31, 138, 76, 0.3);
  background: rgba(31, 138, 76, 0.1);
}

.stack-cost-band.band-moderate {
  color: #b07700;
  border-color: rgba(176, 119, 0, 0.3);
  background: rgba(176, 119, 0, 0.1);
}

.stack-cost-band.band-high {
  color: #b3261e;
  border-color: rgba(179, 38, 30, 0.3);
  background: rgba(179, 38, 30, 0.1);
}

.stack-cost-basis {
  font-size: 12px;
  color: var(--muted);
  margin: 0;
  line-height: 1.5;
}

.stack-cost-breakdown {
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 14px;
  row-gap: 4px;
  margin: 8px 0 10px;
  padding: 8px 0 10px;
  border-top: 1px dashed var(--border);
  border-bottom: 1px dashed var(--border);
}

.stack-cost-breakdown dt {
  font-size: 12px;
  color: var(--muted);
}

.stack-cost-breakdown dd {
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
  text-align: right;
}

.stack-cost-breakdown dd.is-muted {
  color: var(--muted);
  font-weight: 400;
}

/* Dot bar */

.dot-bar {
  display: inline-flex;
  gap: 5px;
  align-items: center;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
}

.dot.is-filled {
  background: var(--accent);
}

/* ── Mobile (≤ 720px) ─────────────────────────────────────────────
   Tighter container padding and more compact cost summary. */
@media (max-width: 720px) {
  .stack-analysis {
    margin: 24px 0 56px;
    padding: 18px 16px;
    border-radius: 10px;
  }

  .stack-cost-split {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .stack-cost-list {
    column-gap: 12px;
  }

  .stack-cost-summary {
    padding: 12px 14px;
  }

  .stack-cost-num {
    font-size: 18px;
  }

  .stack-usage-toggle {
    grid-template-columns: repeat(2, 1fr);
    gap: 4px;
  }

  .stack-usage-option {
    padding: 6px 8px;
  }

  .stack-usage-option-sub {
    display: none;
  }

  .stack-usage-custom {
    padding: 12px 14px;
  }

  .stack-usage-custom-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .stack-usage-custom-foot {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .stack-metric-row {
    flex-wrap: wrap;
    gap: 8px 12px;
  }
}