/* ---------- Tweaks panel ---------- */
#tweaks {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000;
  width: 300px;
  background: oklch(0.1 0.008 260 / 0.95);
  backdrop-filter: blur(16px);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink-dim);
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.6);
  display: none;
}
#tweaks.open { display: block; }
#tweaks h5 {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
#tweaks .close { color: var(--ink-mute); cursor: pointer; font-size: 14px; }
#tweaks .close:hover { color: var(--ink); }

#tweaks .group {
  padding: 12px 0;
  border-top: 1px dashed var(--line-soft);
}
#tweaks .group:first-of-type { border-top: none; padding-top: 0; }
#tweaks .group-label {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 10px;
}
#tweaks .opts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
#tweaks .opts button {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
  background: transparent;
  transition: all .2s;
}
#tweaks .opts button:hover { border-color: var(--ink-dim); color: var(--ink); }
#tweaks .opts button.on {
  background: var(--k-lime);
  color: #000;
  border-color: var(--k-lime);
}

#tweaks .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
}
#tweaks .toggle {
  width: 32px; height: 18px;
  background: var(--line);
  border-radius: 10px;
  position: relative;
  cursor: pointer;
  transition: background .2s;
}
#tweaks .toggle::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--ink);
  transition: left .2s;
}
#tweaks .toggle.on { background: var(--k-lime); }
#tweaks .toggle.on::after { left: 16px; background: #000; }

.tweaks-fab {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 999;
  width: 44px; height: 44px;
  background: oklch(0.12 0.008 260);
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  color: var(--ink);
  display: none;
}
.tweaks-fab.show { display: grid; }
.tweaks-fab:hover { background: var(--k-lime); color: #000; }

/* ---------- Variant themes ---------- */
body[data-accent="lime"] { --hl: var(--k-lime); }
body[data-accent="pink"] { --hl: var(--k-pink); }
body[data-accent="amber"] { --hl: var(--k-amber); }
body[data-accent="blue"] { --hl: var(--k-blue); }
body[data-accent="pink"] .cursor-dot { background: var(--k-pink); }
body[data-accent="pink"] body.cursor-hover .cursor-ring { border-color: var(--k-pink); }
body[data-accent="amber"] .cursor-dot { background: var(--k-amber); }
body[data-accent="blue"] .cursor-dot { background: var(--k-blue); }

/* scanline intensity */
body[data-scan="heavy"] .crt .scan {
  background: repeating-linear-gradient(0deg, transparent 0 1px, rgba(0,0,0,0.45) 1px 2px);
}
body[data-scan="off"] .crt .scan { display: none; }

/* crt glow color variants */
body[data-crt="amber"] .crt {
  background:
    radial-gradient(circle at 30% 25%, oklch(0.22 0.06 65) 0%, oklch(0.1 0.03 65) 50%, oklch(0.04 0.01 65) 100%);
  box-shadow:
    inset 0 0 30px rgba(0,0,0,0.8),
    inset 0 4px 8px rgba(255,255,255,0.05),
    0 0 0 6px oklch(0.08 0.005 260),
    0 0 0 7px oklch(0.18 0.008 260),
    0 0 30px oklch(0.78 0.15 65 / 0.15);
}
body[data-crt="amber"] .crt-ink { stroke: oklch(0.85 0.18 65); filter: drop-shadow(0 0 3px oklch(0.85 0.18 65)); }
body[data-crt="amber"] .crt-text { fill: oklch(0.85 0.18 65); filter: drop-shadow(0 0 2px oklch(0.85 0.18 65)); }
body[data-crt="amber"] .crt-grid { stroke: oklch(0.55 0.12 65 / 0.4); }

body[data-crt="blue"] .crt {
  background:
    radial-gradient(circle at 30% 25%, oklch(0.22 0.06 240) 0%, oklch(0.1 0.03 240) 50%, oklch(0.04 0.01 240) 100%);
}
body[data-crt="blue"] .crt-ink { stroke: oklch(0.85 0.18 240); filter: drop-shadow(0 0 3px oklch(0.85 0.18 240)); }
body[data-crt="blue"] .crt-text { fill: oklch(0.85 0.18 240); filter: drop-shadow(0 0 2px oklch(0.85 0.18 240)); }
body[data-crt="blue"] .crt-grid { stroke: oklch(0.55 0.12 240 / 0.4); }