.pc-subtitle {
  color: var(--muted);
  margin: -0.5rem 0 1.75rem;
  font-size: 1rem;
}

/* Tabs */
.pc-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.pc-tab {
  padding: 0.5rem 1.1rem;
  border: 1px solid #e4e8f0;
  border-radius: 20px;
  background: var(--card);
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
  font-family: inherit;
}

.pc-tab:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.pc-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Mode panels */
.pc-mode {
  display: none;
}

.pc-mode.active {
  display: block;
}

/* Sentence-style input */
.pc-sentence {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.6rem;
  font-size: 1.6rem;
  font-weight: 500;
  margin-bottom: 1.75rem;
  line-height: 2.2;
}

.pc-sentence span {
  color: var(--muted);
}

.pc-input-inline {
  width: 5.5rem;
  padding: 0.15rem 0.5rem 0.1rem;
  border: 0;
  border-bottom: 2.5px solid var(--accent);
  border-radius: 0;
  background: transparent;
  font-size: inherit;
  font-weight: 700;
  font-family: inherit;
  color: var(--text);
  text-align: center;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: textfield;
  box-shadow: none;
}

.pc-input-inline::-webkit-outer-spin-button,
.pc-input-inline::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.pc-input-inline:focus {
  outline: none;
  border-bottom-color: var(--text);
}

/* Result */
.pc-result {
  background: var(--card);
  border: 1px solid #e4e8f0;
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.pc-result__text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin: 0;
  word-break: break-all;
}

.pc-result__text.empty {
  font-size: 1rem;
  font-weight: 400;
  color: var(--muted);
}

.pc-result__text.increase {
  color: #16a34a;
}

.pc-result__text.decrease {
  color: #dc2626;
}

.pc-copy-btn {
  flex-shrink: 0;
  padding: 0.45rem 1rem;
  border: 1px solid #e4e8f0;
  border-radius: 8px;
  background: var(--card);
  color: var(--muted);
  font-size: 0.85rem;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
  display: none;
}

.pc-copy-btn.visible {
  display: block;
}

.pc-copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* SEO section */
.pc-seo {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid #e4e8f0;
  color: var(--muted);
  font-size: 0.92rem;
}

.pc-seo h2 {
  font-size: 1.1rem;
  color: var(--text);
  margin: 0 0 0.5rem;
}

.pc-seo h3 {
  font-size: 0.95rem;
  color: var(--text);
  margin: 1.25rem 0 0.3rem;
}

.pc-seo p {
  margin: 0;
  line-height: 1.6;
}

@media (max-width: 480px) {
  .pc-sentence {
    font-size: 1.3rem;
  }

  .pc-input-inline {
    width: 4.5rem;
  }

  .pc-result {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .pc-result__text {
    font-size: 1.25rem;
  }
}