/* ─────────────────────────────────────────────
   input.css — Input bar, textarea, buttons,
   attachment previews, reply indicator, token counter

   Single-row layout:
   [+ new] [attach] [  textarea  ] [tokens] [mic] [send]
   ───────────────────────────────────────────── */


/* ─── Input Bar Container ─── */

#input-bar {
  grid-area: input;
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 0;
  padding: var(--gutter);
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  z-index: var(--z-input);
  transition: border-color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

#input-bar.drag-over {
  border-top-color: var(--color-text-3);
  background: var(--color-surface-1);
}


/* ─── Reply Indicator ─── */

#reply-indicator {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  margin-bottom: var(--space-2);
  background: var(--color-surface-1);
  border-left: 2px solid var(--color-text-muted);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  line-height: 1.4;
}

#reply-indicator[hidden] {
  display: none;
}

#reply-indicator-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#btn-cancel-reply {
  display: grid;
  place-items: center;
  width: var(--control-h);
  height: var(--control-h);
  padding: 0;
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast) var(--ease-out);
}

#btn-cancel-reply:hover {
  color: var(--color-text-primary);
}

#btn-cancel-reply i {
  font-size: 14px;
  line-height: 1;
}


/* ─── Attachment Previews ─── */

#attachment-previews {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  margin-bottom: var(--space-2);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--color-surface-2) transparent;
  -webkit-overflow-scrolling: touch;
}

#attachment-previews[hidden] {
  display: none;
}

#attachment-previews .attachment-thumb {
  position: relative;
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-surface-1);
  border: 1px solid var(--color-border);
}

#attachment-previews .attachment-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#attachment-previews .attachment-thumb-file {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--space-1);
  word-break: break-all;
  line-height: 1.2;
}

#attachment-previews .attachment-thumb .btn-remove-attachment {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 18px;
  height: 18px;
  padding: 0;
  display: grid;
  place-items: center;
  background: var(--color-bg);
  border: none;
  border-radius: 50%;
  color: var(--color-text-muted);
  font-size: 10px;
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
}

#attachment-previews .attachment-thumb:hover .btn-remove-attachment {
  opacity: 1;
}


/* ─── Main Input Row ─── */

#input-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: end;
  gap: var(--gutter);
  transition: grid-template-columns var(--duration-fast) var(--ease-out);
}


/* ─── Left + Right Action Groups ─── */

#input-actions-left,
#input-actions-right {
  display: flex;
  align-items: center;
  gap: var(--gutter);
  overflow: hidden;
  transition: width var(--duration-fast) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
}


/* ─── Focus State: collapse to just textarea + send ─── */

#input-row:has(#message-input:focus) {
  grid-template-columns: 1fr auto;
  gap: var(--gutter);
}

#input-row:has(#message-input:focus) #input-actions-left {
  display: none;
}

#input-row:has(#message-input:focus) #btn-voice {
  display: none;
}


/* ─── Shared Button Base (all 36×36, uniform) ─── */

#input-actions-left button,
#input-actions-right button {
  display: grid;
  place-items: center;
  width: var(--control-h);
  height: var(--control-h);
  padding: 0;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--color-text-3);
  cursor: pointer;
  transition:
    background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
  -webkit-tap-highlight-color: transparent;
  flex-shrink: 0;
}

#input-actions-left button:hover,
#input-actions-right button:hover {
  color: var(--color-text-1);
  background: var(--color-surface-1);
}

#input-actions-left button:active,
#input-actions-right button:active {
  background: var(--color-surface-2);
}

/* Icon sizing inside all input bar buttons */
#input-actions-left button i,
#input-actions-right button i {
  font-size: 18px;
  line-height: 1;
}


/* ─── New Thread Button ─── */

#btn-new-thread {
  border-color: var(--color-border);
}

#btn-new-thread:hover {
  border-color: var(--color-text-3);
}


/* ─── Attach Button ─── */

#btn-attach {
  /* inherits shared base */
}


/* ─── Textarea ─── */

#input-wrapper {
  position: relative;
  display: grid;
}

#message-input {
  width: 100%;
  min-height: var(--control-h);
  max-height: 160px;
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: 1.5;
  resize: none;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-surface-2) transparent;
  transition: border-color var(--duration-fast) var(--ease-out);
  field-sizing: content;
}

#message-input::placeholder {
  color: var(--color-text-4);
}

#message-input:focus {
  outline: none;
  border-color: var(--color-text-3);
}


/* ─── Token Counter (sticky bottom-right of messages section) ─── */

#token-counter {
  position: absolute;
  bottom: var(--gutter);
  right: var(--gutter);
  display: grid;
  place-items: center;
  width: var(--control-h);
  height: var(--control-h);
  z-index: var(--z-base);
  pointer-events: none;
  opacity: 0.6;
  transition: opacity var(--duration-fast) var(--ease-out);
}

#token-counter:hover {
  opacity: 1;
  pointer-events: auto;
}

#token-counter svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

#token-counter-label {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 500;
  color: var(--color-text-4);
  letter-spacing: -0.03em;
  line-height: 1;
}

#token-counter-ring {
  transition:
    stroke-dashoffset 0.6s var(--ease-out),
    stroke 0.3s var(--ease-out);
}

/* Token usage thresholds — toggled via JS class on #token-counter */
#token-counter.usage-high #token-counter-ring {
  stroke: var(--color-accent-yellow);
}

#token-counter.usage-critical #token-counter-ring {
  stroke: var(--color-accent-red);
}

#token-counter.usage-high #token-counter-label {
  color: var(--color-accent-yellow);
}

#token-counter.usage-critical #token-counter-label {
  color: var(--color-accent-red);
}

#token-counter.usage-high,
#token-counter.usage-critical {
  opacity: 1;
}


/* ─── Voice Button ─── */

#btn-voice.recording {
  color: var(--color-accent-red) !important;
  animation: pulse-recording 1.5s ease-in-out infinite;
}

@keyframes pulse-recording {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}


/* ─── Send Button ─── */

#btn-send {
  background: var(--color-text-1) !important;
  color: var(--color-bg) !important;
  border-color: var(--color-text-1) !important;
  border-radius: 50% !important;
}

#btn-send:hover {
  background: var(--color-text-2) !important;
  border-color: var(--color-text-2) !important;
}

#btn-send:active {
  background: var(--color-text-3) !important;
  border-color: var(--color-text-3) !important;
}

#btn-send i {
  font-size: 18px;
  font-weight: 700;
}


/* ─── Stop Button ─── */

#btn-stop {
  color: var(--color-accent-red) !important;
  border-color: var(--color-accent-red) !important;
  border-radius: 50% !important;
  background: transparent !important;
}

#btn-stop[hidden] {
  display: none;
}

#btn-stop:hover {
  background: var(--color-accent-red) !important;
  color: var(--color-bg) !important;
}

#btn-stop i {
  font-size: 14px;
}


/* ═══════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════ */

/* 374px floor — prevent iOS font zoom, tighten */
@media (max-width: 374px) {
  #message-input {
    font-size: 16px;
    padding: var(--space-2);
  }

  #input-actions-left button,
  #input-actions-right button {
    width: var(--control-h);
    height: var(--control-h);
  }

  #input-actions-left button i,
  #input-actions-right button i {
    font-size: 16px;
  }

  #token-counter {
    width: var(--control-h);
    height: var(--control-h);
  }

  #token-counter-label {
    font-size: 8px;
  }
}

/* Tablet+ */
@media (min-width: 768px) {
  #message-input {
    max-height: 240px;
  }

  #attachment-previews .attachment-thumb {
    width: 64px;
    height: 64px;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  #message-input {
    max-height: 320px;
  }
}



/* Foldable */
@media (horizontal-viewport-segments: 2) {
  #input-bar {
    margin-left: env(viewport-segment-left-1-width, 0);
  }
}