/* Back to top */
.btt {
  position: fixed; right: 24px; bottom: 24px; z-index: 50;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  background: var(--ink); color: var(--bg);
  border: 1px solid var(--ink);
  font: 500 11px var(--font-mono); letter-spacing: 1.5px;
  opacity: 0; transform: translateY(8px); pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
  border-radius: 2px;
}
.btt.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.btt:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
[data-theme="dark"] .btt { background: var(--ink); color: var(--bg); }
@media (max-width: 700px) { .btt { right: 16px; bottom: 16px; padding: 8px 12px; } }

/* Scroll progress */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px;
  background: transparent; z-index: 100; pointer-events: none;
}
.scroll-progress__bar {
  height: 100%; background: var(--accent);
  transform-origin: left center; transform: scaleX(0);
  transition: transform 50ms linear;
}

/* Palette (Cmd+K) */
.palette[hidden] { display: none !important; }
.palette {
  position: fixed; inset: 0; z-index: 1000;
  display: grid; place-items: start center;
  padding-top: 14vh;
}
.palette__backdrop {
  position: absolute; inset: 0;
  background: color-mix(in oklch, var(--ink) 40%, transparent);
  backdrop-filter: blur(6px);
  opacity: 0; transition: opacity var(--dur) var(--ease);
}
.palette.show .palette__backdrop { opacity: 1; }

.palette__dialog {
  position: relative;
  width: min(640px, calc(100vw - 32px));
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  box-shadow: 0 40px 80px -20px color-mix(in oklch, var(--ink) 40%, transparent),
              0 0 0 1px color-mix(in oklch, var(--ink) 8%, transparent);
  overflow: hidden;
  opacity: 0; transform: translateY(-8px) scale(.98);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.palette.show .palette__dialog { opacity: 1; transform: translateY(0) scale(1); }

.palette__search {
  display: flex; align-items: center; gap: 12px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}
.palette__icon { font-size: 20px; color: var(--ink-faint); }
.palette__search input {
  flex: 1; background: none; border: 0; outline: 0;
  font: 400 18px var(--font-sans); color: var(--ink);
}
.palette__search input::placeholder { color: var(--ink-subtle); }
.palette__hint {
  font: 500 10px var(--font-mono); color: var(--ink-faint);
  padding: 3px 8px; border: 1px solid var(--line); border-radius: 4px;
  background: var(--bg-sunken);
}

.palette__results {
  max-height: 420px; overflow-y: auto;
  padding: 6px;
}
.palette__row {
  width: 100%; display: grid; grid-template-columns: 32px 1fr auto; align-items: center; gap: 12px;
  padding: 10px 14px; border-radius: 8px;
  text-align: left; transition: background 120ms var(--ease);
}
.palette__row:hover, .palette__row.active { background: var(--bg-sunken); }
.palette__row.active { box-shadow: inset 0 0 0 1px var(--accent); }
.palette__row-icon {
  width: 32px; height: 32px; display: grid; place-items: center;
  background: var(--bg); border: 1px solid var(--line);
  border-radius: 6px; font-size: 14px; color: var(--ink-muted);
}
.palette__row.active .palette__row-icon { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.palette__row-main { display: flex; flex-direction: column; min-width: 0; }
.palette__row-label { font: 500 15px var(--font-sans); color: var(--ink); }
.palette__row-sub { font-size: 11px; color: var(--ink-faint); letter-spacing: .5px; margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.palette__row-type {
  font-size: 10px; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--ink-subtle); padding: 3px 8px;
  border: 1px solid var(--line); border-radius: 4px;
}

.palette__empty {
  padding: 40px 20px; text-align: center;
  font-size: 12px; color: var(--ink-faint); letter-spacing: 1px;
}

.palette__foot {
  display: flex; gap: 20px; justify-content: flex-end;
  padding: 10px 16px; border-top: 1px solid var(--line);
  background: var(--bg-sunken);
  font-size: 10px; color: var(--ink-faint); letter-spacing: 1px;
}
.palette__foot kbd {
  display: inline-block; padding: 1px 6px; margin-right: 4px;
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: 3px; font: 500 10px var(--font-mono); color: var(--ink-muted);
}

@media (max-width: 600px) {
  .palette { padding-top: 8vh; }
  .palette__search { padding: 14px 16px; }
  .palette__search input { font-size: 16px; }
  .palette__foot { display: none; }
}