/* ---------------------------------------------------------------------------
   The keyboard layer (keynav.js): pointers, the command ribbon, the key map.
   Ported from humanitloop; its stamp red is this app's amber and its approve
   green is this app's green. Functional feedback, not decoration — all motion
   goes under prefers-reduced-motion.
   --------------------------------------------------------------------------- */
:root {
  --kn-surface: light-dark(#f0f3f2,#1d2128);
  --kn-surface-2: light-dark(#f0f3f2,#282c34);
  --kn-line: light-dark(#a3aca9,#3b4048);
  --kn-ink: light-dark(#344344,#abb2bf);
  --kn-ink-muted: light-dark(#586763,#828997);
  --kn-stamp: light-dark(#76551e,#e5c07b);
  --kn-approve: light-dark(#586763,#98c379);
  --kn-highlight: light-dark(#f0f3f2,#21252b);
  --kn-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --kn-display: Georgia, 'Times New Roman', 'Noto Serif', serif;
}

.keynav-hints {
  position: fixed;
  inset: 0;
  z-index: 10020;
  pointer-events: none;
  isolation: isolate;
}
.keynav-hint {
  position: fixed;
  transform: translate(-20%, -70%);
  font-family: var(--kn-mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  padding: 3px 5px 3px 6px;
  border: 1px solid color-mix(in srgb, var(--kn-surface-2) 72%, transparent);
  border-radius: 4px 4px 4px 1px;
  background: var(--kn-stamp);
  color: var(--kn-surface-2);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--kn-stamp) 35%, transparent), 0 2px 8px rgb(0 0 0 / 0.28);
  white-space: nowrap;
  animation: keynav-pointer-in 110ms ease-out both;
  transition: background-color 120ms ease-out, border-color 120ms ease-out, color 120ms ease-out, box-shadow 140ms ease-out;
}
.keynav-hint::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 6px;
  height: 6px;
  background: var(--kn-stamp);
  clip-path: polygon(0 0, 100% 0, 0 100%);
}
.keynav-hint b {
  font-weight: 700;
  color: var(--kn-highlight);
  opacity: 1;
}
.keynav-hint span {
  opacity: 0.78;
}
.keynav-hint--dim {
  display: none;
}
.keynav-hint--charged {
  z-index: 2;
  transform: translate(-20%, -70%) scale(1.14) !important;
  border-color: color-mix(in srgb, var(--kn-highlight) 70%, var(--kn-approve));
  background: var(--kn-approve);
  color: var(--kn-surface-2);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--kn-approve) 70%, transparent),
              0 0 13px color-mix(in srgb, var(--kn-approve) 48%, transparent),
              0 2px 8px rgb(0 0 0 / 0.28);
}
.keynav-hint--charged::after {
  background: var(--kn-approve);
}
.keynav-hint--ready {
  z-index: 3;
  transform: translate(-20%, -70%) scale(1.24) !important;
  border-color: var(--kn-highlight);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--kn-highlight) 75%, transparent),
              0 0 19px color-mix(in srgb, var(--kn-approve) 60%, transparent),
              0 2px 8px rgb(0 0 0 / 0.28);
}
.keynav-hint-target {
  outline: 1px solid color-mix(in srgb, var(--kn-stamp) 40%, transparent) !important;
  outline-offset: 3px;
}
.keynav-hint-target--ready {
  outline: 2px solid var(--kn-stamp) !important;
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--kn-stamp) 12%, transparent) !important;
}

@keyframes keynav-pointer-in {
  from { opacity: 0; transform: translate(-20%, -42%) scale(0.82); }
  to { opacity: 1; transform: translate(-20%, -70%) scale(1); }
}

/* A selected pointer discharges at the exact place it marked. It is a fast
   lock-on confirmation, not a navigation delay disguised as decoration. */
.keynav-echo {
  position: fixed;
  z-index: 10040;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  isolation: isolate;
  padding: 3px 5px;
  border: 1px solid var(--kn-stamp);
  border-radius: 4px 4px 4px 1px;
  background: var(--kn-stamp);
  color: var(--kn-surface-2);
  font: 800 12px/1 var(--kn-mono);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  transform-origin: 20% 80%;
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--kn-stamp) 45%, transparent),
              0 0 12px color-mix(in srgb, var(--kn-stamp) 36%, transparent);
  animation: keynav-mark-fire 520ms cubic-bezier(0.16, 0.72, 0.18, 1) both;
}
.keynav-echo::before {
  content: "";
  position: absolute;
  inset: -5px;
  border-block: 1px solid var(--kn-approve);
  opacity: 0;
  animation: keynav-mark-brackets 520ms ease-out both;
}
@keyframes keynav-mark-fire {
  0% {
    opacity: 1;
    transform: scale(1);
  }
  18% {
    opacity: 1;
    background: var(--kn-approve);
    border-color: var(--kn-highlight);
    color: var(--kn-highlight);
    transform: scale(1.18);
  }
  52% {
    opacity: 0.88;
    background: transparent;
    border-color: var(--kn-approve);
    color: var(--kn-approve);
    letter-spacing: 0.2em;
    transform: scale(1.78);
  }
  100% {
    opacity: 0;
    background: transparent;
    border-color: transparent;
    color: var(--kn-approve);
    letter-spacing: 0.52em;
    transform: scale(3.1);
    box-shadow: 0 0 0 12px transparent;
  }
}
@keyframes keynav-mark-brackets {
  0%, 12% { opacity: 0; transform: scaleX(0.65); }
  34% { opacity: 0.9; transform: scaleX(1.15); }
  100% { opacity: 0; transform: scaleX(2.7); }
}

/* The keystroke ribbon is deliberately more instrument panel than toast. */
.keynav-command {
  position: fixed;
  left: 50%;
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 10030;
  display: grid;
  grid-template-columns: auto auto;
  align-items: center;
  gap: 0.7rem;
  min-width: 11rem;
  max-width: min(32rem, calc(100vw - 2rem));
  padding: 0.55rem 0.75rem 0.55rem 0.6rem;
  overflow: hidden;
  border: 1px solid var(--kn-line);
  border-radius: 7px;
  background: var(--kn-surface-2);
  color: var(--kn-ink);
  font-family: var(--kn-mono);
  font-size: .75rem;
  box-shadow: 0 4px 18px rgb(0 0 0 / 0.14);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 0.8rem) scale(0.97);
  transition: opacity 100ms ease-out, transform 130ms ease-out, border-color 120ms ease-out;
}
.keynav-command--visible {
  opacity: 0.96;
  transform: translate(-50%, 0) scale(1);
}
.keynav-command__beam {
  position: absolute;
  top: -1px;
  left: 0;
  width: 2.5rem;
  height: 2px;
  background: var(--kn-stamp);
  box-shadow: 0 0 8px color-mix(in srgb, var(--kn-stamp) 75%, transparent);
  opacity: 0;
}
.keynav-command--visible .keynav-command__beam {
  opacity: 0.72;
  animation: keynav-single-light 300ms ease-out both;
}
.keynav-command--combo {
  border-color: color-mix(in srgb, var(--kn-stamp) 58%, var(--kn-line));
  animation: keynav-combo-flare 420ms ease-out both;
}
.keynav-command--combo .keynav-command__beam {
  animation: keynav-combo-light 480ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}
.keynav-command--pending {
  border-color: var(--kn-approve);
  background: color-mix(in srgb, var(--kn-approve) 8%, var(--kn-surface-2));
  box-shadow: 0 4px 18px rgb(0 0 0 / 0.14),
              0 0 0 3px color-mix(in srgb, var(--kn-approve) 10%, transparent),
              0 0 17px color-mix(in srgb, var(--kn-approve) 18%, transparent);
  transform: translate(-50%, 0) scale(1.035);
}
.keynav-command--pending .keynav-command__beam {
  width: 36%;
  background: var(--kn-approve);
  box-shadow: 0 0 11px color-mix(in srgb, var(--kn-approve) 78%, transparent);
  opacity: 0.82;
  animation: keynav-power-wait 720ms ease-in-out infinite alternate;
}
.keynav-command--pending .keynav-command__keys kbd {
  border-color: color-mix(in srgb, var(--kn-approve) 68%, var(--kn-highlight));
  background: var(--kn-approve);
  color: var(--kn-surface-2);
  box-shadow: 0 0 9px color-mix(in srgb, var(--kn-approve) 28%, transparent);
  transform: scale(1.08);
}
.keynav-command--pending .keynav-command__keys i {
  color: var(--kn-approve);
  opacity: 0.9;
}
.keynav-command__slot {
  min-width: 1.35rem !important;
  border-style: dashed !important;
  color: var(--kn-highlight) !important;
  animation: keynav-slot-wait 620ms steps(2, jump-none) infinite;
}
.keynav-command--miss {
  border-color: var(--kn-ink-muted);
  opacity: 0.78;
}
.keynav-command--miss .keynav-command__beam {
  background: var(--kn-ink-muted);
  box-shadow: none;
}
.keynav-command__keys {
  display: flex;
  align-items: center;
  gap: 0.22rem;
  white-space: nowrap;
}
.keynav-command__keys kbd,
.keynav-help kbd,
.keynav-nudge kbd {
  display: inline-flex;
  min-width: 1.65rem;
  height: 1.65rem;
  align-items: center;
  justify-content: center;
  padding: 0 0.35rem;
  border: 1px solid color-mix(in srgb, var(--kn-stamp) 52%, var(--kn-line));
  border-radius: 4px;
  background: var(--kn-surface);
  color: var(--kn-stamp);
  font: 700 .75rem/1 var(--kn-mono);
  box-shadow: inset 0 -1px 0 color-mix(in srgb, var(--kn-line) 80%, transparent);
}
.keynav-command__keys i {
  color: var(--kn-ink-muted);
  font-style: normal;
  opacity: 0.55;
}
.keynav-command__verb {
  min-width: 0;
  overflow: hidden;
  color: var(--kn-ink-muted);
  text-overflow: ellipsis;
  white-space: nowrap;
}
.keynav-command--up .keynav-command__verb::before { content: "↑ "; color: var(--kn-stamp); }
.keynav-command--down .keynav-command__verb::before { content: "↓ "; color: var(--kn-stamp); }

@keyframes keynav-single-light {
  from { transform: translateX(-120%); opacity: 0; }
  35% { opacity: 0.8; }
  to { transform: translateX(14rem); opacity: 0; }
}
@keyframes keynav-combo-light {
  from { width: 1rem; transform: translateX(-130%); opacity: 0; }
  28% { opacity: 1; }
  to { width: 52%; transform: translateX(205%); opacity: 0; }
}
@keyframes keynav-combo-flare {
  0% { box-shadow: 0 4px 18px rgb(0 0 0 / 0.14), 0 0 0 0 color-mix(in srgb, var(--kn-stamp) 30%, transparent); }
  42% { box-shadow: 0 4px 18px rgb(0 0 0 / 0.14), 0 0 0 7px color-mix(in srgb, var(--kn-stamp) 9%, transparent); }
  100% { box-shadow: 0 4px 18px rgb(0 0 0 / 0.14), 0 0 0 12px transparent; }
}
@keyframes keynav-power-wait {
  from { transform: translateX(-8%); opacity: 0.38; }
  to { transform: translateX(180%); opacity: 0.95; }
}
@keyframes keynav-slot-wait {
  from { opacity: 0.42; }
  to { opacity: 1; }
}

.keynav-flash-target {
  outline: 2px solid var(--kn-stamp) !important;
  outline-offset: 4px;
  animation: keynav-target-flash 600ms ease-out both;
}
@keyframes keynav-target-flash {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--kn-stamp) 38%, transparent); }
  100% { box-shadow: 0 0 0 9px transparent; }
}

.keynav-help {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 10025;
  width: min(47rem, calc(100vw - 2rem));
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  padding: 1.1rem 1.2rem 0.9rem;
  border: 1px solid var(--kn-line);
  border-top: 2px solid var(--kn-stamp);
  border-radius: 8px;
  background: var(--kn-surface-2);
  box-shadow: 0 12px 34px rgb(0 0 0 / 0.2);
  color: var(--kn-ink);
  font-family: var(--kn-mono);
  font-size: 0.75rem;
  animation: keynav-help-in 150ms ease-out both;
}
.keynav-help__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--kn-line);
}
.keynav-help__header h2 {
  margin-top: 0.12rem;
  font-family: var(--kn-display);
  font-size: 1.25rem;
  font-weight: 400;
}
.keynav-help__eyebrow,
.keynav-help h3 {
  color: var(--kn-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: .75rem;
}
.keynav-help__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 1rem;
  padding: 1rem 0 0.85rem;
}
.keynav-help h3 {
  margin-bottom: 0.48rem;
}
.keynav-help dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.38rem 0.65rem;
  align-items: center;
}
.keynav-help dt {
  display: flex;
  gap: 0.16rem;
  color: var(--kn-stamp);
}
.keynav-help dd {
  color: var(--kn-ink-muted);
  line-height: 1.25;
}
.keynav-help kbd {
  min-width: 1.35rem;
  height: 1.35rem;
  padding: 0 0.25rem;
  font-size: .75rem;
}
.keynav-help__foot {
  padding-top: 0.72rem;
  border-top: 1px solid var(--kn-line);
  color: var(--kn-ink-muted);
  font-size: .75rem;
}
.keynav-help__foot kbd {
  display: inline;
  min-width: 0;
  height: auto;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  color: var(--kn-stamp);
}
@keyframes keynav-help-in {
  from { opacity: 0; transform: translateY(0.6rem); }
  to { opacity: 1; transform: translateY(0); }
}

.keynav-nudge {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 10010;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.52rem 0.7rem;
  overflow: hidden;
  border: 1px solid var(--kn-line);
  border-radius: 7px;
  background: var(--kn-surface-2);
  color: var(--kn-ink-muted);
  font-family: var(--kn-mono);
  font-size: .75rem;
  box-shadow: 0 4px 18px rgb(0 0 0 / 0.12);
  animation: keynav-nudge-in 180ms ease-out both;
}
/* Zen has its own visible ? help; the transient global hint must not cover its footer. */
body.reading .keynav-nudge { display: none; }
.keynav-nudge__line {
  position: absolute;
  top: 0;
  left: 0;
  width: 2.4rem;
  height: 2px;
  background: var(--kn-stamp);
}
.keynav-nudge__quiet {
  padding-left: 0.55rem;
  border-left: 1px solid var(--kn-line);
}
.keynav-nudge kbd {
  display: inline-flex;
  min-width: 1.3rem;
  height: 1.3rem;
  padding: 0 0.24rem;
  font-size: .75rem;
}
@keyframes keynav-nudge-in {
  from { opacity: 0; transform: translateY(0.5rem); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 700px) {
  .keynav-command {
    bottom: max(0.65rem, env(safe-area-inset-bottom));
    width: calc(100vw - 1.3rem);
  }
  .keynav-help {
    right: 0.65rem;
    bottom: max(0.65rem, env(safe-area-inset-bottom));
    width: calc(100vw - 1.3rem);
  }
  .keynav-help__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .keynav-nudge {
    right: 0.65rem;
    bottom: max(0.65rem, env(safe-area-inset-bottom));
  }
  .keynav-nudge__quiet { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .keynav-hint,
  .keynav-command,
  .keynav-command__beam,
  .keynav-command--combo,
  .keynav-command__slot,
  .keynav-echo,
  .keynav-echo::before,
  .keynav-flash-target,
  .keynav-help,
  .keynav-nudge {
    animation: none !important;
    transition: none !important;
  }
}