:root {
  --n-card: #fff;
  --n-panel: #fffaf3;
  --n-panel-strong: #f7ead8;
  --n-input: #fff;
  --n-border: #ead9c5;
  --n-border-strong: #c88c52;
  --n-ink: #2d211a;
  --n-muted: #7c6859;
  --n-brand: #a84e27;
  --n-brand-dark: #71301b;
  --n-brand-soft: #f5ddc5;
  --n-coffee: #6d3024;
  --n-water: #d28c39;
  --n-yield: #bd6b36;
  --n-retained: #bca58d;
  --n-dilution: #e4ad5e;
  --n-success: #3c7d59;
  --n-warning: #a76d24;
  --n-danger: #a44632;
  --n-shadow: rgba(76, 41, 25, 0.14);
}

.theme-dark {
  --n-card: #271e1a;
  --n-panel: #33251e;
  --n-panel-strong: #473024;
  --n-input: #211916;
  --n-border: #5b4030;
  --n-border-strong: #e39b58;
  --n-ink: #fff1dc;
  --n-muted: #c9ae93;
  --n-brand: #e28a4b;
  --n-brand-dark: #ffc38b;
  --n-brand-soft: #553121;
  --n-coffee: #c77654;
  --n-water: #e0a34c;
  --n-yield: #d8894c;
  --n-retained: #8e7762;
  --n-dilution: #f1bd70;
  --n-success: #82c699;
  --n-warning: #f2bb68;
  --n-danger: #ee947a;
  --n-shadow: rgba(0, 0, 0, 0.38);
}

.cold-brew-ratio-calculator {
  display: grid;
  grid-template-columns: minmax(270px, 0.82fr) minmax(0, 1.35fr);
  gap: 1rem;
  max-width: 1120px;
  margin: 0 auto;
  padding: 1rem;
  border: 1px solid var(--n-border);
  border-radius: 1.4rem;
  background: var(--n-card);
  color: var(--n-ink);
  box-shadow: 0 1.5rem 3rem var(--n-shadow);
}

.cold-brew-controls,
.cold-brew-results {
  min-width: 0;
  border: 1px solid var(--n-border);
  border-radius: 1rem;
}

.cold-brew-controls {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding: 1rem;
  background: var(--n-panel);
}

.cold-brew-controls h2,
.cold-brew-results h2,
.cold-brew-visual-stage h3,
.cold-brew-steps h3 {
  margin: 0;
  color: var(--n-ink);
  font-size: 1.08rem;
  line-height: 1.2;
}

.cold-brew-unit-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.25rem;
  padding: 0.2rem;
  border: 1px solid var(--n-border);
  border-radius: 0.65rem;
  background: var(--n-input);
}

.cold-brew-unit-button,
.cold-brew-mode-button,
.cold-brew-preset,
.cold-brew-action {
  border: 1px solid var(--n-border);
  color: var(--n-muted);
  cursor: pointer;
  font: inherit;
  transition: 160ms ease;
}

.cold-brew-unit-button {
  padding: 0.45rem;
  border: 0;
  border-radius: 0.45rem;
  background: transparent;
  font-size: 0.75rem;
  font-weight: 800;
}

.cold-brew-unit-button.is-active {
  background: var(--n-brand);
  color: var(--n-card);
}

.cold-brew-mode-grid,
.cold-brew-preset-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.cold-brew-mode-button {
  display: grid;
  gap: 0.18rem;
  min-height: 5.8rem;
  padding: 0.7rem;
  border-radius: 0.75rem;
  background: var(--n-input);
  text-align: left;
}

.cold-brew-mode-button:hover,
.cold-brew-mode-button.is-active,
.cold-brew-preset:hover,
.cold-brew-preset.is-active {
  border-color: var(--n-brand);
  color: var(--n-brand-dark);
}

.cold-brew-mode-button.is-active,
.cold-brew-preset.is-active {
  background: var(--n-brand-soft);
  box-shadow: inset 0 -3px var(--n-brand);
}

.cold-brew-mode-icon {
  color: var(--n-brand);
  font-size: 1.3rem;
  line-height: 1;
}

.cold-brew-mode-button span:nth-child(2),
.cold-brew-preset {
  font-weight: 800;
}

.cold-brew-mode-button small,
.cold-brew-label-row span {
  color: var(--n-muted);
  font-size: 0.72rem;
  line-height: 1.3;
}

.cold-brew-preset {
  padding: 0.58rem 0.45rem;
  border-radius: 0.6rem;
  background: var(--n-input);
  font-size: 0.78rem;
}

.cold-brew-form-section {
  display: grid;
  gap: 0.45rem;
}

.cold-brew-section-label,
.cold-brew-label-row {
  margin: 0;
  color: var(--n-ink);
  font-size: 0.84rem;
  font-weight: 800;
}

.cold-brew-label-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
}

.cold-brew-input-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.cold-brew-range {
  min-width: 0;
  flex: 1;
  accent-color: var(--n-brand);
  cursor: pointer;
}

.cold-brew-number {
  width: 4.6rem;
  padding: 0.52rem 0.25rem;
  border: 1px solid var(--n-border);
  border-radius: 0.6rem;
  background: var(--n-input);
  color: var(--n-ink);
  font: inherit;
  font-weight: 800;
  text-align: center;
}

.cold-brew-number:focus {
  border-color: var(--n-border-strong);
  outline: 2px solid var(--n-brand-soft);
}

.cold-brew-unit,
.cold-brew-ratio-display,
.cold-brew-time-display {
  min-width: 3.3rem;
  color: var(--n-brand);
  font-size: 0.8rem;
  font-weight: 900;
  text-align: right;
}

.cold-brew-concentrate-only {
  display: none;
}

.is-concentrate .cold-brew-concentrate-only {
  display: grid;
}

.cold-brew-control-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.25rem;
}

.cold-brew-action {
  border-radius: 0.65rem;
  padding: 0.65rem 0.8rem;
  font-size: 0.8rem;
  font-weight: 800;
}

.cold-brew-action-primary {
  flex: 1;
  border-color: var(--n-brand);
  background: var(--n-brand);
  color: var(--n-card);
}

.cold-brew-action-primary:hover {
  background: var(--n-brand-dark);
}

.cold-brew-action-quiet {
  background: transparent;
}

.cold-brew-action-quiet:hover {
  border-color: var(--n-brand);
  color: var(--n-brand);
}

.cold-brew-results {
  overflow: hidden;
  background: var(--n-card);
}

.cold-brew-result-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.1rem 0;
}

.cold-brew-kicker {
  margin: 0 0 0.2rem;
  color: var(--n-brand);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.cold-brew-result-badge,
.cold-brew-status {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.cold-brew-result-badge {
  padding: 0.4rem 0.6rem;
  background: var(--n-brand-soft);
  color: var(--n-brand-dark);
  white-space: nowrap;
}

.cold-brew-visual-stage {
  margin: 0.9rem 1.1rem 0;
  padding: 0.95rem;
  border: 1px solid var(--n-border);
  border-radius: 0.8rem;
  background: var(--n-panel);
}

.cold-brew-visual-heading {
  margin-bottom: 1rem;
}

.cold-brew-flow-lanes {
  display: grid;
  gap: 0.8rem;
}

.cold-brew-flow-lane {
  display: grid;
  gap: 0.35rem;
}

.cold-brew-flow-label {
  color: var(--n-muted);
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.cold-brew-flow-track {
  display: flex;
  width: 100%;
  height: 2.35rem;
  overflow: hidden;
  border-radius: 0.55rem;
  background: var(--n-panel-strong);
}

.cold-brew-flow-segment {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  color: var(--n-card);
  transition: width 350ms ease, opacity 200ms ease;
}

.cold-brew-flow-segment b {
  overflow: hidden;
  padding: 0 0.25rem;
  font-size: 0.68rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cold-brew-flow-coffee {
  background: var(--n-coffee);
}

.cold-brew-flow-water {
  background: var(--n-water);
}

.cold-brew-flow-yield,
.cold-brew-flow-served {
  background: var(--n-yield);
}

.cold-brew-flow-retained {
  background: var(--n-retained);
}

.cold-brew-flow-dilution {
  background: var(--n-dilution);
}

.cold-brew-flow-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.8rem;
  margin-top: 0.85rem;
  color: var(--n-muted);
  font-size: 0.68rem;
}

.cold-brew-flow-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.cold-brew-legend-dot {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
}

.cold-brew-legend-coffee { background: var(--n-coffee); }
.cold-brew-legend-water { background: var(--n-water); }
.cold-brew-legend-retained { background: var(--n-retained); }
.cold-brew-legend-served { background: var(--n-yield); }
.cold-brew-legend-dilution { background: var(--n-dilution); }

.cold-brew-stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.55rem;
  padding: 0.9rem 1.1rem 0;
}

.cold-brew-stat {
  display: grid;
  gap: 0.3rem;
  min-width: 0;
  padding: 0.65rem;
  border: 1px solid var(--n-border);
  border-radius: 0.7rem;
  background: var(--n-panel);
}

.cold-brew-stat span {
  color: var(--n-muted);
  font-size: 0.68rem;
  line-height: 1.2;
}

.cold-brew-stat strong {
  color: var(--n-ink);
  font-size: 0.95rem;
}

.cold-brew-stat-feature strong,
.cold-brew-stat-total strong {
  color: var(--n-brand);
}

.cold-brew-stat-total {
  grid-column: auto;
}

.cold-brew-result-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.9rem;
  align-items: center;
  padding: 0.8rem 1.1rem 0;
  color: var(--n-muted);
  font-size: 0.75rem;
}

.cold-brew-result-meta b {
  color: var(--n-ink);
}

.cold-brew-status {
  padding: 0.3rem 0.5rem;
}

.cold-brew-status-short {
  background: var(--n-danger);
  color: var(--n-card);
}

.cold-brew-status-balanced {
  background: var(--n-success);
  color: var(--n-card);
}

.cold-brew-status-long {
  background: var(--n-warning);
  color: var(--n-card);
}

.cold-brew-steps {
  padding: 1rem 1.1rem;
}

.cold-brew-steps ol {
  display: grid;
  gap: 0.5rem;
  margin: 0.7rem 0 0;
  padding: 0;
  list-style: none;
}

.cold-brew-steps li {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--n-muted);
  font-size: 0.78rem;
}

.cold-brew-steps li > span {
  display: grid;
  width: 1.4rem;
  height: 1.4rem;
  flex: 0 0 1.4rem;
  place-items: center;
  border-radius: 50%;
  background: var(--n-brand-soft);
  color: var(--n-brand-dark);
  font-weight: 900;
}

.cold-brew-steps p {
  margin: 0;
}

@media (max-width: 850px) {
  .cold-brew-ratio-calculator {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .cold-brew-ratio-calculator {
    gap: 0.75rem;
    padding: 0.6rem;
    border-radius: 1.1rem;
  }

  .cold-brew-stat-grid {
    grid-template-columns: 1fr 1fr;
  }

  .cold-brew-stat-total {
    grid-column: 1 / -1;
  }

}