/* ============================================================
   panel.css — the "Appearance" control deck (built in src/ui/panel.js)
   ============================================================ */

.panel-toggle {
  position: fixed;
  top: clamp(1rem, 2.5vw, 1.75rem);
  right: var(--pad);
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.9rem;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: border-color 0.25s ease, background-color 0.25s ease;
}
.panel-toggle:hover { border-color: var(--accent); }
.panel-toggle__dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

.panel {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 40;
  width: min(360px, 92vw);
  height: 100svh;
  padding: clamp(1.5rem, 3vw, 2rem);
  overflow-y: auto;
  background: color-mix(in srgb, var(--bg) 88%, #000 12%);
  border-left: 1px solid var(--line);
  backdrop-filter: blur(16px);
  transform: translateX(100%);
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.panel.is-open { transform: translateX(0); }

.panel__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}
.panel__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}
.panel__sub {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 0.25rem;
}
.panel__close {
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  width: 34px; height: 34px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: border-color 0.2s ease;
}
.panel__close:hover { border-color: var(--accent); }

.field { display: flex; flex-direction: column; gap: 0.85rem; }
.field__label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}
.field__value { color: var(--accent); }

/* --- Palette swatches --- */
.swatches { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.6rem; }
.swatch {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.6rem;
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  color: var(--text);
  text-align: left;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.swatch:hover { transform: translateY(-2px); }
.swatch.is-active { border-color: var(--accent); }
.swatch.is-active::after {
  content: "";
  position: absolute;
  top: 0.5rem; right: 0.5rem;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.swatch__chips { display: flex; gap: 4px; }
.swatch__chip {
  width: 100%;
  height: 22px;
  border-radius: 5px;
}
.swatch__name {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

/* --- Segmented selector (visual direction) --- */
.segments { display: flex; flex-direction: column; gap: 0.5rem; }
.segment {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.8rem 0.9rem;
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.segment:hover { border-color: var(--accent); }
.segment.is-active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}
.segment__id {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  width: 1.5rem;
}
.segment__body { display: flex; flex-direction: column; }
.segment__name { font-weight: 700; font-size: 0.95rem; }
.segment__desc { font-size: 0.78rem; color: var(--muted); }

/* --- Range slider --- */
.range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 3px;
  border-radius: 999px;
  background: var(--line);
  cursor: pointer;
}
.range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  border: none;
}
.range::-moz-range-thumb {
  width: 18px; height: 18px;
  border: none;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

/* --- Toggle switch --- */
.toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 10px;
}
.toggle__text { font-size: 0.9rem; }
.toggle__hint { font-size: 0.75rem; color: var(--muted); }
.toggle__switch {
  position: relative;
  width: 46px; height: 26px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  cursor: pointer;
  flex: none;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}
.toggle__switch::after {
  content: "";
  position: absolute;
  top: 50%; left: 3px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--muted);
  transform: translateY(-50%);
  transition: transform 0.2s ease, background-color 0.2s ease;
}
.toggle__switch[aria-pressed="true"] {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 22%, transparent);
}
.toggle__switch[aria-pressed="true"]::after {
  transform: translate(20px, -50%);
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.panel__footer {
  margin-top: auto;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.panel__footer a { color: var(--accent); }