/* ═══════════════════════════════════════════════════
   SPLIT — draggable diptych, both halves visible
   ═══════════════════════════════════════════════════ */

.variant-split { background: #050505; overflow: hidden; }
.variant-split .nav { display: none; }

/* ─── Floating nav ─── */
.sp-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 48px;
  background: linear-gradient(to bottom, rgba(0,0,0,0.55), transparent);
  font-family: var(--font-sans);
}
.sp-nav-logo img {
  height: 38px;
  width: auto;
  filter: brightness(1.15);
}
.sp-nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.85);
}
.sp-nav-links a:hover { color: var(--accent-light); }
.sp-nav-cta {
  padding: 11px 22px;
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: 100px;
  transition: all 0.3s var(--ease);
}
.sp-nav-cta:hover { background: #fff; color: #0b0b0b; border-color: #fff; }

/* ─── Split stage ─── */
.sp {
  --bias: 50%;
  position: relative;
  height: 100vh;
  min-height: 720px;
  width: 100%;
  font-family: var(--font-sans);
}

.sp-half {
  position: absolute;
  top: 0; bottom: 0;
  overflow: hidden;
  cursor: pointer;
  transition: clip-path 0s; /* width changes via positioning */
}
.sp-half--res {
  left: 0;
  width: var(--bias);
}
.sp-half--com {
  right: 0;
  width: calc(100% - var(--bias));
}
.sp.is-snapping .sp-half--res,
.sp.is-snapping .sp-half--com {
  transition: width 0.7s cubic-bezier(0.5, 1.4, 0.4, 1);
}

.sp-bg {
  position: absolute;
  top: 0; height: 100%;
  background-position: center center;
  background-size: cover;
  background-repeat: no-repeat;
  filter: brightness(0.55) saturate(1.05);
  transition: filter 0.6s var(--ease), transform 0.8s var(--ease);
}
.sp-half--res .sp-bg {
  left: 0;
  width: 100vw; /* fills full viewport so the image doesn't squish on narrow halves */
}
.sp-half--com .sp-bg {
  right: 0;
  width: 100vw;
}

/* Active half brightens, recessed half darkens */
.sp[data-variant="residential"] .sp-half--res .sp-bg { filter: brightness(0.75) saturate(1.1); }
.sp[data-variant="residential"] .sp-half--com .sp-bg { filter: brightness(0.32) saturate(0.7); }
.sp[data-variant="commercial"]  .sp-half--com .sp-bg { filter: brightness(0.75) saturate(1.1); }
.sp[data-variant="commercial"]  .sp-half--res .sp-bg { filter: brightness(0.32) saturate(0.7); }

.sp-tint {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(0,0,0,0.35) 0%, transparent 30%, transparent 60%, rgba(0,0,0,0.85) 100%);
}
.sp-tint--com { background: linear-gradient(180deg, rgba(0,0,0,0.5) 0%, transparent 30%, transparent 50%, rgba(0,0,0,0.9) 100%); }

/* ─── Half content ─── */
.sp-half-content {
  position: absolute;
  bottom: 90px;
  z-index: 4;
  color: #fff;
  width: 480px;
  max-width: 75%;
  pointer-events: none; /* clicks fall through to the half except for explicit links */
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.sp-half-content a { pointer-events: auto; }

.sp-half--res .sp-half-content { left: 64px; }
.sp-half--com .sp-half-content { right: 64px; text-align: right; }

/* Recessed half fades + shrinks */
.sp[data-variant="residential"] .sp-half--com .sp-half-content { opacity: 0.4; transform: translateY(8px) scale(0.96); }
.sp[data-variant="commercial"]  .sp-half--res .sp-half-content { opacity: 0.4; transform: translateY(8px) scale(0.96); }

.sp-half-meta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  letter-spacing: 0.36em;
  color: rgba(255,255,255,0.78);
  margin-bottom: 24px;
  text-transform: uppercase;
}
.sp-half--com .sp-half-meta { flex-direction: row-reverse; }
.sp-half-rule {
  width: 36px; height: 1px;
  background: var(--accent-light);
}
.sp-half-num { color: var(--accent-light); font-weight: 500; }

.sp-half-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.2rem, 4.6vw, 4.4rem);
  line-height: 1.0;
  letter-spacing: -0.01em;
  color: #fff;
  margin-bottom: 24px;
  text-shadow: 0 4px 30px rgba(0,0,0,0.55);
}
.sp-half-title em { font-style: italic; color: var(--accent-light); }

.sp-half-copy {
  font-size: 0.92rem;
  font-weight: 300;
  line-height: 1.65;
  color: rgba(255,255,255,0.78);
  margin-bottom: 22px;
  max-width: 420px;
}
.sp-half--com .sp-half-copy { margin-left: auto; }

.sp-half-list {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.78);
}
.sp-half-list li {
  padding: 8px 0;
  border-top: 1px solid rgba(255,255,255,0.14);
}
.sp-half-list li:last-child { border-bottom: 1px solid rgba(255,255,255,0.14); }

.sp-half-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff;
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  border-radius: 100px;
  -webkit-backdrop-filter: blur(8px);
          backdrop-filter: blur(8px);
  transition: all 0.35s var(--ease);
}
.sp-half-cta:hover {
  background: var(--accent-light);
  border-color: var(--accent-light);
  color: #0b0b0b;
}

/* ─── Centre lockup over seam ─── */
.sp-mark {
  position: absolute;
  left: var(--bias);
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 5;
  pointer-events: none;
  text-align: center;
  color: #fff;
  mix-blend-mode: difference;
  transition: left 0s;
}
.sp.is-snapping .sp-mark { transition: left 0.7s cubic-bezier(0.5, 1.4, 0.4, 1); }
.sp-mark-lockup {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: var(--font-display);
  letter-spacing: 0.4em;
}
.sp-mark-est {
  font-size: 11px;
  font-family: var(--font-sans);
  letter-spacing: 0.5em;
  margin-bottom: 6px;
  opacity: 0.75;
}
.sp-mark-year {
  font-size: 4rem;
  font-weight: 300;
  letter-spacing: 0.18em;
  line-height: 1;
}

/* ─── Drag handle ─── */
.sp-handle {
  position: absolute;
  top: 0; bottom: 0;
  left: var(--bias);
  width: 44px;
  margin-left: -22px;
  z-index: 6;
  cursor: ew-resize;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: left 0s;
}
.sp.is-snapping .sp-handle { transition: left 0.7s cubic-bezier(0.5, 1.4, 0.4, 1); }
.sp-handle::before {
  content: "";
  position: absolute;
  inset: 0;
}
.sp-handle-line {
  flex: 1;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(91,192,190,0.45), transparent);
}
.sp-handle-knob {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: rgba(0,0,0,0.55);
  border: 1px solid var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-light);
  -webkit-backdrop-filter: blur(12px);
          backdrop-filter: blur(12px);
  margin: 0;
  box-shadow: 0 0 40px rgba(91,192,190,0.4);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}
.sp-handle:hover .sp-handle-knob,
.sp.is-dragging .sp-handle-knob {
  transform: scale(1.08);
  background: var(--accent-light);
  color: #0b0b0b;
}

/* ─── Top toggle (redundant control) ─── */
.sp-toggle-wrap {
  position: absolute;
  top: 116px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 7;
  display: flex;
  gap: 1px;
  background: rgba(0,0,0,0.4);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 100px;
  padding: 5px;
  -webkit-backdrop-filter: blur(14px);
          backdrop-filter: blur(14px);
}
.sp-toggle-btn {
  padding: 10px 24px;
  font-size: 10px;
  letter-spacing: 0.32em;
  color: rgba(255,255,255,0.6);
  border-radius: 100px;
  transition: all 0.3s var(--ease);
}
.sp-toggle-btn.is-active {
  background: var(--accent-light);
  color: #0b0b0b;
}

/* ─── Drag hint ─── */
.sp-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  font-size: 10px;
  letter-spacing: 0.4em;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 14px;
  animation: hintBlink 3.6s ease-in-out infinite;
}
.sp-hint::before, .sp-hint::after {
  content: "";
  width: 28px; height: 1px;
  background: rgba(255,255,255,0.4);
}
@keyframes hintBlink {
  0%, 100% { opacity: 0.6; }
  50%      { opacity: 1; }
}
.sp.is-dragging .sp-hint { opacity: 0; }

/* ─── Reduced motion ─── */
@media (prefers-reduced-motion: reduce) {
  .sp.is-snapping .sp-half--res,
  .sp.is-snapping .sp-half--com,
  .sp.is-snapping .sp-handle,
  .sp.is-snapping .sp-mark { transition: none !important; }
  .sp-hint { animation: none; }
  .sp-handle-knob { box-shadow: none; }
}

/* ─── Responsive: stack the halves vertically ─── */
@media (max-width: 860px) {
  .sp {
    --bias: 50%;
    height: auto;
    min-height: 0;
  }
  .sp-half {
    position: relative;
    width: 100% !important;
    left: auto; right: auto;
    height: 70vh;
  }
  .sp-half--res, .sp-half--com {
    width: 100%;
  }
  .sp-half--com .sp-half-content { right: 24px; left: auto; }
  .sp-half--res .sp-half-content { left: 24px; }
  .sp-half-content { bottom: 40px; width: 70%; }
  .sp-bg { width: 100% !important; left: 0 !important; right: 0 !important; }

  .sp-handle, .sp-mark, .sp-hint { display: none; }

  .sp-toggle-wrap { top: 100px; }

  .sp-nav { padding: 16px 20px; }
  .sp-nav-links { display: none; }
}