.sp-page { padding: 56px 0 100px; }
.sp-intro { text-align: center; max-width: 56ch; margin: 0 auto 30px; }
.sp-intro .hero__eyebrow { margin-bottom: 18px; }
.sp-intro h1 { font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.4rem); letter-spacing: -0.02em; margin: 0 0 10px; }
.sp-intro p { color: var(--ink-soft); margin: 0; line-height: 1.6; }

.sp-layout { display: grid; grid-template-columns: 1.2fr 1fr; gap: 20px; align-items: start; margin-bottom: 34px; }
.sp-diagram { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 22px; }
.sp-card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; flex-wrap: wrap; }
.sp-card-head h2 { font-family: var(--font-display); font-size: 1.1rem; margin: 0; }
.sp-hint { font-size: 0.78rem; color: var(--ink-soft); }

.sp-svg { width: 100%; max-width: 420px; height: auto; display: block; margin: 0 auto; }
.sp-part { cursor: pointer; transition: opacity var(--dur-fast) var(--ease); animation: sp-pulse 2s ease-in-out infinite; }
.sp-part:hover, .sp-part:focus { opacity: 0.75; outline: none; }
.sp-part.is-active { opacity: 0.6; }
@keyframes sp-pulse {
  0%, 100% { filter: drop-shadow(0 0 0 rgba(var(--accent-rgb, 11, 122, 85), 0)); }
  50% { filter: drop-shadow(0 0 8px rgba(var(--accent-rgb, 11, 122, 85), 0.75)); }
}
.sp-part--lungs { animation: none; }
.sp-label { font-size: 12px; font-weight: 600; fill: var(--ink-soft); font-family: 'Inter', sans-serif; }

.sp-info { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 26px; min-height: 340px; display: flex; align-items: center; justify-content: center; }
.sp-info__empty { text-align: center; color: var(--ink-soft); max-width: 30ch; }
.sp-info__icon { font-size: 2.6rem; display: block; margin-bottom: 10px; }
.sp-info__empty p { font-size: 0.92rem; line-height: 1.6; margin: 0; }
.sp-info__content { width: 100%; }
.sp-info__badge { display: inline-block; font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent-ink); background: rgba(var(--accent-rgb, 11, 122, 85),0.1); padding: 5px 12px; border-radius: 999px; margin-bottom: 12px; }
.sp-info__content h2 { font-family: var(--font-display); font-size: 1.5rem; margin: 0 0 10px; color: var(--accent-ink); }
.sp-info__content p { color: var(--ink-soft); font-size: 0.95rem; line-height: 1.75; margin: 0; }

.sp-process { max-width: 900px; margin: 0 auto; }
.sp-process > h2 { font-family: var(--font-display); font-size: 1.4rem; text-align: center; margin: 0 0 20px; }
.sp-process-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.sp-process-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 22px 26px; }
.sp-process-card h3 { font-family: var(--font-display); font-size: 1.05rem; margin: 0 0 12px; }
.sp-process-card ol { margin: 0; padding-left: 20px; }
.sp-process-card li { color: var(--ink-soft); font-size: 0.9rem; line-height: 1.75; }

@media (max-width: 880px) {
  .sp-layout { grid-template-columns: 1fr; }
  .sp-process-grid { grid-template-columns: 1fr; }
}