/* #region zone:desk.style.composer-shell — กล่องพิมพ์เดียวและแถบปุ่มสมมาตร */
.chat-col .chat-form {
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3) var(--sp-3);
}
.composer-shell {
  min-width: 0;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 25px;
  background: var(--composer-menu-bg);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--text) 6%, transparent);
}
/* Text entry owns the surface ring; each button owns its round focus ring. */
.composer-shell:focus-within:not(:has(button:focus)) {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--acc-ring);
}
.composer-shell .chat-attach-preview {
  margin: var(--sp-2) var(--sp-3);
}
.composer-entry {
  display: flex;
  align-items: flex-end;
  gap: var(--sp-2);
  min-width: 0;
}
.chat-form .composer-shell #chat-input,
.chat-form .composer-shell #chat-input:focus,
.chat-form .composer-shell #chat-input:focus-visible {
  display: block;
  width: 0;
  min-width: 0;
  flex: 1 1 0;
  field-sizing: fixed;
  height: 44px;
  min-height: 44px;
  max-height: 164px;
  padding: 10px 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--text);
  box-shadow: none;
  outline: none;
  font-family: var(--font-sans);
  font-size: var(--u-body);
  line-height: 24px;
}
.composer-toolbar,
.composer-left,
.composer-right {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  min-width: 0;
}
.composer-toolbar {
  justify-content: space-between;
  flex-wrap: wrap;
  padding-inline: var(--sp-2);
}
.composer-left {
  flex: 0 1 auto;
}
.composer-right {
  flex: 0 1 auto;
  flex-wrap: wrap;
  justify-content: flex-end;
  margin-left: auto;
}
.chat-form .composer-ghost,
.chat-form .composer-send {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  gap: var(--sp-1);
  width: auto;
  height: 44px;
  min-height: 44px;
  min-width: 44px;
  margin: 0;
  padding: 0 var(--sp-2);
  border: 0;
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: var(--fs-md);
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  box-shadow: none;
  cursor: pointer;
}
.chat-form .composer-ghost:hover,
.chat-form .composer-ghost:focus-visible,
.chat-form .composer-ghost:active {
  background: var(--hover);
}
.chat-form .composer-ghost:focus-visible,
.chat-form .composer-send:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.composer-toolbar .chat-context {
  display: flex;
  align-items: center;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
}
.composer-toolbar .chat-context[hidden],
.composer-toolbar .effort-wrap[hidden] {
  display: none;
}
.composer-toolbar .context-action {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border-radius: var(--r-pill);
  color: var(--muted);
  font-size: var(--fs-md);
}
.composer-toolbar .context-action:hover,
.composer-toolbar .chat-context-btn:focus-visible .context-action,
.composer-toolbar .chat-context-btn:active .context-action {
  background: var(--panel);
}
.composer-toolbar #chat-context-text {
  max-width: 64px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.composer-toolbar .effort-wrap {
  align-self: center;
}
/* Model and effort triggers: two chips of one shape (same height, pill radius, soft fill, chevron). */
.chat-form .composer-right #model-picker-btn,
.chat-form .composer-right #effort-btn {
  background: color-mix(in srgb, var(--text) 7%, transparent);
  padding-inline: var(--sp-3);
}
.chat-form .composer-right #model-picker-btn:hover,
.chat-form .composer-right #effort-btn:hover,
.chat-form .composer-right #model-picker-btn:focus-visible,
.chat-form .composer-right #effort-btn:focus-visible,
.chat-form .composer-right #model-picker-btn[aria-expanded='true'],
.chat-form .composer-right #effort-btn[aria-expanded='true'] {
  background: color-mix(in srgb, var(--text) 13%, transparent);
}
.composer-toolbar .effort-model {
  display: none;
}
.chat-form .composer-ghost svg,
.chat-form .composer-send svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}
.chat-form .chat-attach-btn,
.chat-form .composer-send {
  width: 44px;
  padding: 0;
  border-radius: 50%;
}
.chat-form .chat-attach-btn svg {
  width: 22px;
  height: 22px;
}
.composer-send-disc {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
}
.composer-send:disabled {
  opacity: 1;
  cursor: default;
}
.composer-send:disabled .composer-send-disc {
  background: var(--line);
  color: var(--muted);
}
.composer-send:not(:disabled):hover,
.composer-send:not(:disabled):active {
  background: var(--hover);
}
.composer-send .send-stop,
.composer-send.is-streaming .send-arrow {
  display: none;
}
.composer-send.is-streaming .send-stop {
  display: block;
  width: 12px;
  height: 12px;
  fill: currentColor;
}
/* Keep round-three keyboard sizing; the essential send/attach row remains available. */
:root[data-chat-kb] .chat-col .chat-form {
  padding-top: 0;
  /* The external metadata keeps the original compact form footprint. */
  padding-bottom: var(--sp-1);
}
:root[data-chat-kb] .composer-shell #chat-input {
  /* Reserve messages/navigation and the new surface inset using the measured viewport. */
  max-height: clamp(44px, calc(var(--chat-viewport-height, 100dvh) - 354px - var(--sp-2)), 164px);
  overflow-y: auto;
}
/* A photo and keyboard must not push Send off-screen: yield conversation space and scroll the draft. */
:root[data-chat-kb] .composer-shell:has(.chat-attach-preview:not([hidden])) #chat-input {
  max-height: 44px;
}
:root[data-chat-kb] .chat-col:has(.chat-attach-preview:not([hidden])) .chat-messages {
  min-height: 0;
}
:root[data-chat-kb] .chat-col .chat-card-head {
  align-items: center;
  padding-block: 0;
}
:root[data-chat-kb] .chat-col .chat-messages {
  min-height: 0;
  padding-block: 0;
}
:root[data-chat-kb] #app-shell[data-mobile-tab='chat'] .chat-col {
  height: calc(
    var(--chat-viewport-height, 100dvh) + var(--chat-viewport-offset, 0px) - var(--chat-viewport-top, 60px) -
      var(--chat-tabs-height, 56px) - 8px - env(safe-area-inset-bottom, 0px)
  );
}
/* #endregion */

/* #region zone:desk.style.composer-menu — เมนูลอยใน viewport ทั้งสองธีม */
.composer-menu {
  position: fixed;
  inset: auto;
  box-sizing: border-box;
  width: max-content;
  min-width: var(--menu-min-width);
  max-width: var(--menu-max-width);
  margin: 0;
  padding: var(--menu-padding);
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-inner);
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--pop-shadow);
}
/* One row height for every item: 44px touch, 32px with a mouse on a wide screen. */
@media (min-width: 900px) and (hover: hover) and (pointer: fine) {
  .composer-menu {
    --menu-row-height: 32px;
  }
}
.composer-menu #model-switch,
.composer-menu #model-menu-actions,
.composer-menu .composer-submenu:not([hidden]),
.composer-menu.effort-menu:popover-open {
  display: flex;
  flex-direction: column;
  gap: var(--menu-gap);
}
.composer-menu:popover-open {
  display: block;
}
/* Author display rules must never expose a closed native popover as an empty panel. */
.composer-menu[popover]:not(:popover-open) {
  display: none;
}
.composer-menu [hidden] {
  display: none;
}
.composer-menu .composer-menu-item,
.composer-menu .effort-item,
.composer-menu .model-submenu-back {
  display: flex;
  align-items: center;
  gap: var(--menu-row-gap);
  min-height: var(--menu-row-height);
  width: 100%;
  padding: var(--menu-row-padding);
  border: 0;
  border-radius: var(--menu-row-radius);
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: var(--menu-font-size);
  line-height: var(--menu-line-height);
  text-align: left;
  cursor: pointer;
}
.composer-menu .model-mark {
  margin-left: auto;
  color: var(--muted);
  width: var(--menu-icon-size);
  font-size: var(--menu-icon-size);
  text-align: center;
  font-family: system-ui, sans-serif;
}
.composer-menu [aria-checked='true'] .model-mark {
  color: #287ceb;
  font-size: var(--menu-icon-size);
}
.model-current-effort {
  margin-left: auto;
  color: var(--muted);
  font-size: var(--menu-font-size);
}
.model-chevron {
  width: var(--menu-icon-size);
  color: var(--muted);
  font-size: var(--menu-icon-size);
  line-height: 1;
  text-align: center;
}
.composer-menu .composer-menu-usage {
  display: block;
  width: 100%;
  padding: var(--sp-2) 10px var(--sp-1);
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: var(--u-text-xs);
  text-align: left;
  cursor: pointer;
}
.model-menu-footer:has(.composer-menu-usage:not([hidden])) {
  border-top: 1px solid var(--line);
  margin-top: 6px;
}
.composer-menu .effort-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0 var(--sp-2);
  padding: var(--menu-row-padding);
  font-size: var(--menu-font-size);
}
.composer-menu .effort-item-alt,
.composer-menu .effort-item-hint {
  color: var(--muted);
  font-size: var(--u-text-xs);
}
.composer-menu .effort-item-hint {
  grid-column: 1 / -1;
  font-size: var(--u-text-xs);
  white-space: normal;
}
.composer-menu .effort-item[aria-checked='true'],
.composer-menu button:hover,
.composer-menu button:focus-visible {
  background: var(--hover);
}
.composer-menu button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.composer-menu [aria-disabled='true'] {
  cursor: not-allowed;
}
.composer-menu .model-submenu-back {
  display: none;
}
@media (max-width: 700px) {
  .composer-menu .composer-submenu {
    position: static;
    width: 100%;
    min-width: 0;
    max-height: none;
    padding: 0;
    border: 0;
    box-shadow: none;
    background: var(--panel);
  }
  .composer-menu .model-submenu-back {
    display: flex;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    margin-bottom: var(--sp-1);
    font-size: var(--menu-font-size);
  }
}
@media (max-width: 767px) {
  html:root .chat-form .composer-shell #chat-input {
    font-size: 16px;
  }
}
/* #endregion */