/* ============================================
   Tweaks panel — custom, on-brand
   ============================================ */
.tweaks-panel {
  position: fixed;
  bottom: 24px; right: 24px;
  width: 260px;
  z-index: 100;
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: 16px;
  font-family: var(--f-sans);
  color: var(--ink);
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
  animation: tw-in .25s ease;
}
@keyframes tw-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.tw-head {
  display: flex; justify-content: space-between; align-items: center;
  padding-bottom: 12px; margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.tw-title {
  font-family: var(--f-mono);
  font-size: 10px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--mute);
}
.tw-close {
  width: 22px; height: 22px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  font-size: 16px;
  color: var(--mute);
  transition: background .2s ease, color .2s ease;
}
.tw-close:hover { background: var(--paper); color: var(--ink); }

.tw-sec + .tw-sec { margin-top: 14px; }
.tw-label {
  font-family: var(--f-mono);
  font-size: 9px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--muter);
  margin-bottom: 8px;
}

.tw-row { display: flex; gap: 6px; flex-wrap: wrap; }
.tw-chip {
  padding: 7px 12px;
  border-radius: 99px;
  border: 1px solid var(--line);
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mute);
  background: transparent;
  transition: all .2s ease;
}
.tw-chip:hover { border-color: var(--line-strong); color: var(--ink); }
.tw-chip.on {
  background: var(--ink); color: var(--bg);
  border-color: var(--ink);
}

.tw-swatch {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  outline: 1px solid var(--line);
  transition: transform .2s ease, outline-color .2s ease;
}
.tw-swatch:hover { transform: scale(1.1); }
.tw-swatch.on {
  outline-color: var(--ink);
  outline-offset: 2px;
}

.tw-foot {
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-family: var(--f-mono);
  font-size: 9px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muter);
}

/* Reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.2,1);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}