/* Stripe Fee Calculator — minimal UI */

.tool-page .page-header {
  margin-bottom: 2rem;
}

.tool-page .page-heading {
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
}

.tool-page .tool-description {
  color: #6b7280;
  margin-top: 0;
  max-width: 520px;
  font-size: 1rem;
  line-height: 1.55;
}

.stripe-fee-calculator {
  --sfc-bg: #ffffff;
  --sfc-surface: #f9fafb;
  --sfc-border: #e5e7eb;
  --sfc-border-soft: #f3f4f6;
  --sfc-text: #111827;
  --sfc-muted: #6b7280;
  --sfc-faint: #9ca3af;
  --sfc-accent: #4f46e5;
  --sfc-accent-soft: #eef2ff;
  --sfc-radius: 14px;
  --sfc-radius-sm: 10px;
  --sfc-shadow: 0 1px 2px rgba(17, 24, 39, 0.04), 0 8px 24px rgba(17, 24, 39, 0.06);

  max-width: 680px;
  color: var(--sfc-text);
  font-family: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.sfc-card {
  background: var(--sfc-bg);
  border: 1px solid var(--sfc-border-soft);
  border-radius: var(--sfc-radius);
  box-shadow: var(--sfc-shadow);
  overflow: hidden;
}

.sfc-body {
  padding: 1.5rem;
}

.sfc-field {
  margin-bottom: 1rem;
}

.sfc-field:last-child {
  margin-bottom: 0;
}

.sfc-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--sfc-muted);
  margin-bottom: 0.5rem;
}

.sfc-select-wrap {
  position: relative;
}

.sfc-select-wrap::after {
  content: '';
  position: absolute;
  right: 1rem;
  top: 50%;
  width: 0.45rem;
  height: 0.45rem;
  border-right: 1.5px solid var(--sfc-muted);
  border-bottom: 1.5px solid var(--sfc-muted);
  transform: translateY(-65%) rotate(45deg);
  pointer-events: none;
}

.sfc-select,
.sfc-input {
  width: 100%;
  padding: 0.72rem 0.9rem;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid var(--sfc-border);
  border-radius: var(--sfc-radius-sm);
  background: var(--sfc-bg);
  color: var(--sfc-text);
  box-sizing: border-box;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  appearance: none;
}

.sfc-select {
  padding-right: 2.25rem;
  cursor: pointer;
}

.sfc-select:hover,
.sfc-input:hover {
  border-color: #d1d5db;
}

.sfc-select:focus,
.sfc-input:focus {
  outline: none;
  border-color: var(--sfc-accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.sfc-addons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.sfc-chip {
  position: relative;
  cursor: pointer;
  user-select: none;
}

.sfc-chip input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.sfc-chip-label {
  display: inline-block;
  padding: 0.42rem 0.8rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--sfc-muted);
  background: var(--sfc-surface);
  border: 1px solid var(--sfc-border);
  border-radius: 999px;
  transition: all 0.18s ease;
}

.sfc-chip:hover .sfc-chip-label {
  border-color: #d1d5db;
  color: var(--sfc-text);
}

.sfc-chip input:checked + .sfc-chip-label {
  color: var(--sfc-accent);
  background: var(--sfc-accent-soft);
  border-color: #c7d2fe;
}

.sfc-chip input:focus-visible + .sfc-chip-label {
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.sfc-custom {
  margin-bottom: 1rem;
  padding: 1rem;
  background: var(--sfc-surface);
  border: 1px solid var(--sfc-border-soft);
  border-radius: var(--sfc-radius-sm);
}

.sfc-custom-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.sfc-custom-grid .sfc-field {
  margin-bottom: 0;
}

.sfc-amount-section {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--sfc-border-soft);
}

.sfc-amount-wrap {
  position: relative;
}

.sfc-currency {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.35rem;
  font-weight: 500;
  color: var(--sfc-faint);
  pointer-events: none;
}

.sfc-amount-input {
  padding: 0.9rem 1rem 0.9rem 2rem;
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  border: none;
  background: var(--sfc-surface);
  border-radius: var(--sfc-radius-sm);
}

.sfc-amount-input::placeholder {
  color: #d1d5db;
  font-weight: 500;
}

.sfc-amount-input:focus {
  background: var(--sfc-bg);
  border: 1px solid var(--sfc-accent);
  padding: calc(0.9rem - 1px) calc(1rem - 1px) calc(0.9rem - 1px) calc(2rem - 1px);
}

.sfc-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--sfc-border-soft);
  background: var(--sfc-surface);
}

.sfc-result {
  padding: 1.35rem 1rem;
  text-align: center;
}

.sfc-result + .sfc-result {
  border-left: 1px solid var(--sfc-border-soft);
}

.sfc-result-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--sfc-faint);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 0.45rem;
}

.sfc-result-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--sfc-text);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  transition: opacity 0.15s ease;
}

.sfc-result-value.is-updating {
  opacity: 0.45;
}

.sfc-result--primary {
  background: var(--sfc-bg);
}

.sfc-result--primary .sfc-result-value {
  color: var(--sfc-accent);
  font-size: 1.65rem;
}

.sfc-result-hint {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.72rem;
  color: var(--sfc-faint);
  line-height: 1.4;
}

.sfc-formula-note {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  margin-top: 0.85rem;
  padding: 0.65rem 0.85rem;
  font-size: 0.8rem;
  color: var(--sfc-muted);
  line-height: 1.45;
  background: var(--sfc-surface);
  border: 1px solid var(--sfc-border-soft);
  border-radius: var(--sfc-radius-sm);
}

.sfc-formula-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--sfc-accent);
  background: var(--sfc-accent-soft);
  border-radius: 999px;
  white-space: nowrap;
}

.sfc-formula-note a {
  color: var(--sfc-accent);
  text-decoration: none;
  font-weight: 500;
}

.sfc-formula-note a:hover {
  text-decoration: underline;
}

.sfc-hidden {
  display: none !important;
}

.sfc-faq {
  margin-top: 3rem;
  max-width: 680px;
  padding-top: 2rem;
  border-top: 1px solid var(--sfc-border-soft, #f3f4f6);
}

.sfc-faq h2 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
  color: #111827;
}

.sfc-faq h2:first-child {
  margin-top: 0;
}

.sfc-faq p {
  color: #6b7280;
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 0;
}

.sfc-faq a {
  color: #4f46e5;
  text-decoration: none;
}

.sfc-faq a:hover {
  text-decoration: underline;
}

@media screen and (max-width: 640px) {
  .sfc-body {
    padding: 1.15rem;
  }

  .sfc-custom-grid {
    grid-template-columns: 1fr;
  }

  .sfc-amount-input {
    font-size: 1.65rem;
  }

  .sfc-results {
    grid-template-columns: 1fr;
  }

  .sfc-result + .sfc-result {
    border-left: none;
    border-top: 1px solid var(--sfc-border-soft);
  }

  .sfc-result-value {
    font-size: 1.35rem;
  }

  .sfc-result--primary .sfc-result-value {
    font-size: 1.45rem;
  }
}