.pc-page { padding: 56px 0 100px; display: flex; flex-direction: column; align-items: center; }
.pc-intro { text-align: center; max-width: 46ch; margin-bottom: 24px; }
.pc-intro .hero__eyebrow { margin-bottom: 18px; }
.pc-intro h1 { font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.4rem); letter-spacing: -0.02em; margin: 0 0 10px; }
.pc-intro p { color: var(--ink-soft); margin: 0; line-height: 1.6; }

.pc-op-tabs { display: flex; flex-wrap: wrap; gap: 6px; background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 5px; max-width: fit-content; margin: 0 auto 24px; }
.pc-op-tab { border: none; background: transparent; padding: 9px 16px; border-radius: 999px; font-weight: 600; font-size: 0.84rem; color: var(--ink-soft); cursor: pointer; transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease); white-space: nowrap; font-family: var(--font-mono); }
.pc-op-tab:hover { color: var(--ink); }
.pc-op-tab.is-active { background: var(--ink); color: #fff; }

.pc-calc-wrap { width: 100%; max-width: 460px; }
.pc-calculator { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 24px; display: flex; flex-direction: column; gap: 18px; }

.pc-frac-section { display: flex; flex-direction: column; gap: 16px; }
.pc-frac-inputs { display: grid; grid-template-columns: 1fr auto 1fr; gap: 10px; align-items: center; }
.pc-frac-group { display: flex; flex-direction: column; gap: 8px; }
.pc-frac-label { font-size: 0.72rem; font-weight: 600; color: var(--ink-soft); }
.pc-frac-box { display: flex; flex-direction: column; align-items: center; gap: 0; background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 8px; }
.pc-frac-box--result { min-width: 80px; }
.pc-frac-num, .pc-frac-den { width: 64px; border: none; background: transparent; font-family: var(--font-mono); font-size: 1.2rem; font-weight: 700; text-align: center; color: var(--ink); }
.pc-frac-num:focus, .pc-frac-den:focus { outline: none; }
.pc-frac-line { width: 48px; height: 2px; background: var(--ink); margin: 4px 0; }
.pc-frac-num-result, .pc-frac-den-result { font-family: var(--font-mono); font-size: 1.2rem; font-weight: 700; color: var(--accent-ink); }
.pc-whole-row { display: flex; align-items: center; gap: 6px; justify-content: center; }
.pc-whole-input { width: 48px; border: 1px solid var(--line); border-radius: 8px; padding: 6px; font-family: var(--font-mono); font-size: 0.88rem; font-weight: 600; text-align: center; background: var(--bg); color: var(--ink); }
.pc-whole-label { font-size: 0.68rem; color: var(--ink-soft); }
.pc-op-symbol { font-size: 1.8rem; font-weight: 700; color: var(--accent); text-align: center; }

.pc-desimal-section { display: flex; flex-direction: column; }
.pc-desimal-inputs { display: flex; align-items: center; gap: 12px; }
.pc-input-group { display: flex; flex-direction: column; gap: 6px; flex: 1; }
.pc-input-group label { font-size: 0.72rem; font-weight: 600; color: var(--ink-soft); }
.pc-desimal-input { border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; font-family: var(--font-mono); font-size: 1.1rem; font-weight: 600; background: var(--bg); color: var(--ink); text-align: center; }
.pc-desimal-input:focus { outline: none; border-color: var(--accent); }
.pc-swap-icon { cursor: pointer; color: var(--ink-soft); transition: transform 140ms var(--ease), color var(--dur-fast) var(--ease); padding-top: 18px; }
.pc-swap-icon:hover { color: var(--accent); transform: rotate(180deg); }

.pc-result { background: var(--ink); border-radius: var(--radius-md); padding: 18px 20px; text-align: center; }
.pc-result-label { font-size: 0.7rem; font-weight: 600; color: rgba(255,255,255,0.4); display: block; margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.04em; }
.pc-result-main { font-family: var(--font-mono); font-size: 1.4rem; font-weight: 700; color: #fff; display: block; }
.pc-result-decimal { font-family: var(--font-mono); font-size: 0.85rem; color: rgba(255,255,255,0.55); margin-top: 2px; display: block; }

.pc-steps { background: rgba(61,90,254,0.03); border: 1px solid var(--line); border-radius: var(--radius-md); padding: 14px 16px; }
.pc-steps__title { font-size: 0.78rem; font-weight: 700; color: var(--ink); display: block; margin-bottom: 6px; }
.pc-steps__content { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-soft); line-height: 1.7; white-space: pre-wrap; }

@media (max-width: 500px) {
  .pc-op-tab { padding: 7px 11px; font-size: 0.76rem; }
  .pc-frac-inputs { gap: 6px; }
  .pc-frac-num, .pc-frac-den { width: 52px; font-size: 1rem; }
}