.kc-preview-toggle {
  position: fixed;
  left: 10px;
  bottom: 10px;
  z-index: 95;
  display: flex;
  gap: .3rem;
  padding: .3rem;
  border: 1px solid var(--kc-border-soft, #e2e8f0);
  border-radius: .75rem;
  background: color-mix(in oklab, var(--kc-surface, #fff) 92%, transparent);
  backdrop-filter: blur(6px);
  box-shadow: 0 8px 24px rgba(15, 23, 42, .14);
}

.dark .kc-preview-toggle {
  border-color: var(--kc-border, #334155);
  background: color-mix(in oklab, var(--kc-surface-soft, #0f172a) 90%, transparent);
}

.kc-preview-btn {
  width: 30px;
  height: 30px;
  border: 1px solid var(--kc-border-soft, #e2e8f0);
  background: transparent;
  color: var(--kc-text, #0f172a);
  border-radius: .6rem;
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  transition: all .15s ease;
}

.dark .kc-preview-btn {
  border-color: var(--kc-border, #334155);
  color: var(--kc-text, #e2e8f0);
}

.kc-preview-btn:hover {
  transform: translateY(-1px);
}

.kc-preview-btn.is-active {
  border-color: var(--kc-primary, #2563eb);
  color: var(--kc-primary, #2563eb);
  background: color-mix(in oklab, var(--kc-primary, #2563eb) 10%, transparent);
}

.kc-preview-icon {
  width: 15px;
  height: 15px;
}

.kc-preview-overlay {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(2, 6, 23, .58);
  backdrop-filter: blur(1px);
  display: grid;
  place-items: center;
  padding: 26px;
}

.kc-preview-frame {
  border: 8px solid #0f172a;
  border-radius: 20px;
  background: #0f172a;
  box-shadow: 0 20px 60px rgba(2, 6, 23, .45);
  overflow: hidden;
}

.kc-preview-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #fff;
}

.kc-preview-frame.tablet.portrait { width: 820px; height: min(1180px, 92vh); }
.kc-preview-frame.tablet.landscape { width: min(1180px, 92vw); height: 820px; }
.kc-preview-frame.phone.portrait { width: 430px; height: min(932px, 92vh); }
.kc-preview-frame.phone.landscape { width: min(932px, 92vw); height: 430px; }

@media (max-width: 1200px) {
  .kc-preview-frame.tablet.portrait { width: min(820px, 94vw); }
  .kc-preview-frame.phone.portrait { width: min(430px, 94vw); }
}