/* Ingredient Substitution Finder (isf) */
/* Cluster: reference (var(--tf-accent)) */

:root {
  --isf-accent: var(--tf-accent);
  --isf-accent-hover: var(--tf-accent-hover);
  --isf-accent-light: var(--tf-accent-wash);
  --isf-accent-border: var(--tf-accent-soft);
  --isf-accent-dark: var(--tf-accent);
  --isf-bg-card: var(--tf-surface, #ffffff);
  --isf-text-primary: var(--tf-ink, #0f172a);
  --isf-text-secondary: var(--tf-ink-soft, #64748b);
  --isf-border-color: var(--tf-rule, #e2e8f0);
}

@media (prefers-color-scheme: dark) {
  :root {
    --isf-accent: var(--tf-accent);
    --isf-accent-hover: var(--tf-accent-hover);
    --isf-accent-light: var(--tf-accent-wash);
    --isf-accent-border: var(--tf-accent-soft);
    --isf-bg-card: var(--tf-surface, #1e293b);
    --isf-text-primary: var(--tf-ink, #f8fafc);
    --isf-text-secondary: var(--tf-ink-soft, #94a3b8);
    --isf-border-color: var(--tf-rule, #334155);
  }
}

.isf-main {
  box-sizing: border-box;
  padding-inline: 1.5rem;
  margin-inline: auto;
  max-width: 46rem;
  width: 100%;
}

.isf-container {
  box-sizing: border-box;
  max-width: 46rem;
  margin-inline: auto;
  padding: 1.5rem 1rem 3rem;
  font-family: inherit;
  color: var(--isf-text-primary);
}

/* Cards */
.isf-card {
  background: var(--isf-bg-card);
  border: 1px solid var(--isf-border-color);
  border-radius: 2px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: none;
}

.isf-search-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.isf-search-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.isf-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--isf-text-primary);
}

.isf-input,
.isf-select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font-size: 0.95rem;
  border: 1px solid var(--isf-border-color);
  border-radius: 2px;
  background: var(--isf-bg-card);
  color: var(--isf-text-primary);
  outline: none;
  transition: border-color 0.2s;
}

.isf-input:focus,
.isf-select:focus {
  border-color: var(--isf-accent);
}

/* Quick Picks & Chips */
.isf-quick-picks {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.isf-quick-label {
  font-weight: 600;
  color: var(--isf-text-secondary);
}

.isf-pill {
  padding: 0.25rem 0.65rem;
  font-size: 0.8rem;
  border-radius: 2px;
  border: 1px solid var(--isf-accent-border);
  background: var(--isf-accent-light);
  color: var(--isf-accent);
  cursor: pointer;
  transition: all 0.15s ease;
}

.isf-pill:hover {
  background-color: var(--isf-accent);
  color: #ffffff;
}

.isf-filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--isf-border-color);
}

.isf-chip {
  padding: 0.35rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 2px;
  border: 1px solid var(--isf-border-color);
  background: var(--isf-bg-card);
  color: var(--isf-text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.isf-chip:hover {
  border-color: var(--isf-accent);
  color: var(--isf-accent);
}

.isf-chip-active {
  background-color: var(--isf-accent);
  color: #ffffff !important;
  border-color: var(--isf-accent);
}

/* Detail Card & Scaler */
.isf-detail-card {
  border-left: 4px solid var(--isf-accent);
}

.isf-detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--isf-border-color);
}

.isf-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  background-color: var(--isf-accent-light);
  color: var(--isf-accent);
  border: 1px solid var(--isf-accent-border);
  margin-bottom: 0.35rem;
}

.isf-detail-title {
  font-size: 1.6rem;
  font-weight: 800;
  margin: 0;
  line-height: 1.2;
}

.isf-scaler-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
  padding: 0.85rem 1rem;
  background: var(--isf-accent-light);
  border-radius: 2px;
}

.isf-scaler-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--isf-text-primary);
}

.isf-scaler-controls {
  display: flex;
  gap: 0.5rem;
}

.isf-scale-input {
  width: 80px;
}

.isf-unit-select {
  width: 140px;
}

.isf-btn {
  padding: 0.6rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 2px;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s;
}

.isf-btn-primary {
  background-color: var(--tf-accent-ink, #ffffff);
  color: var(--tf-accent-ink, #ffffff);
  border: 1px solid var(--tf-accent);
}

.isf-btn-primary:hover {
  background-color: var(--isf-accent-hover);
}

.isf-btn-secondary {
  background-color: transparent;
  color: var(--isf-accent);
  border: 1px solid var(--isf-accent-border);
}

.isf-btn-secondary:hover {
  background-color: var(--isf-accent-light);
}

/* Substitutes Grid */
.isf-substitutes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.isf-sub-card {
  background: var(--isf-bg-card);
  border: 1px solid var(--isf-border-color);
  border-radius: 2px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: none;
}

.isf-sub-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.5rem;
}

.isf-sub-name {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0;
  color: var(--isf-text-primary);
}

.isf-sub-rank {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--isf-accent);
  text-transform: uppercase;
}

.isf-sub-ratio-box {
  background: var(--isf-accent-light);
  border: 1px solid var(--isf-accent-border);
  border-radius: 2px;
  padding: 0.75rem;
  margin: 0.5rem 0 0.85rem;
}

.isf-sub-ratio-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--isf-text-secondary);
  display: block;
  margin-bottom: 0.2rem;
}

.isf-sub-ratio-val {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--isf-accent);
  line-height: 1.35;
}

.isf-sub-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}

.isf-tag {
  font-size: 0.725rem;
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  background-color: var(--isf-accent-light);
  color: var(--isf-accent);
  border: 1px solid var(--isf-accent-border);
  font-weight: 600;
}

.isf-sub-notes {
  font-size: 0.825rem;
  color: var(--isf-text-secondary);
  line-height: 1.45;
}

/* Directory Grid */
.isf-section {
  margin-top: 2rem;
}

.isf-section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1rem;
}

.isf-section-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 0;
}

.isf-count-note {
  font-size: 0.85rem;
  color: var(--isf-text-secondary);
}

.isf-directory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.isf-dir-card {
  background: var(--isf-bg-card);
  border: 1px solid var(--isf-border-color);
  border-radius: 2px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s ease;
}

.isf-dir-card:hover {
  transform: translateY(-2px);
  box-shadow: none;
}

.isf-dir-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.6rem;
}

.isf-dir-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0;
}

.isf-dir-badge {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--isf-text-secondary);
  text-transform: uppercase;
}

.isf-dir-subs-list {
  font-size: 0.825rem;
  color: var(--isf-text-secondary);
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.isf-dir-sub-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.isf-dir-footer {
  border-top: 1px solid var(--isf-border-color);
  padding-top: 0.75rem;
  text-align: right;
}

.isf-view-btn {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--isf-accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
}