/* Chat: the transcript column and the composer dock under it. */

.chat {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  height: 100%;
}

.chat__scroll {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

/* --------------------------------------------------------------- the hero -- */
/* Empty state: greeting centred in the space the transcript will take. */

.chat__hero {
  display: grid;
  align-content: center;
  justify-items: center;
  gap: var(--sp-3);
  min-height: 46vh;
  padding: var(--sp-7) var(--sp-5) var(--sp-5);
  text-align: center;
}
.chat__greeting { max-width: 18ch; }
.chat__lede { max-width: 40ch; font-size: var(--step-0); }

.chat[data-state='running'] .chat__hero { display: none; }

/* ------------------------------------------------------------- transcript -- */

.chat__transcript {
  max-width: var(--reading);
  margin: 0 auto;
  padding: var(--sp-5) var(--sp-5) var(--sp-6);
  display: grid;
  gap: var(--sp-5);
}

.msg { display: grid; gap: var(--sp-2); }

.msg--user {
  justify-items: end;
  justify-self: end;
  max-width: min(42rem, 88%);
}
.msg--user .msg__body {
  padding: var(--sp-3) var(--sp-4);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--r-lg) var(--r-lg) var(--r-sm) var(--r-lg);
}
.msg__image {
  max-width: 260px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
}

/* An aside from the app, not from either party in the conversation: a photo the
   history could not keep, a generation the browser ended itself. Quiet, and
   never mistakeable for something a model said. */
.msg__note {
  font-size: var(--step--1);
  color: var(--text-faint);
  font-style: italic;
}
.msg--user .msg__note { text-align: right; }

.msg--model .msg__who { margin-bottom: var(--sp-1); }
.msg__body > * + * { margin-top: var(--sp-3); }
.msg__body ul, .msg__body ol { padding-left: 1.25rem; display: grid; gap: var(--sp-1); }
.msg__body ul { list-style: disc; }
.msg__body ol { list-style: decimal; }

/*
 * Nine dots in a square, lighting and fading in turn.
 *
 * It replaces a blinking block, which read as a terminal waiting for input -
 * exactly backwards, since the Mac is the one working and nobody is being asked
 * to type. The grid drifts rather than marching in a line, so it says "busy"
 * without suggesting progress it cannot measure.
 */
.thinking {
  display: inline-grid;
  grid-template-columns: repeat(3, 5px);
  gap: 4px;
  vertical-align: -2px;
}
.thinking i {
  width: 5px; height: 5px;
  border-radius: var(--r-pill);
  background: var(--accent);
  opacity: 0.18;
  animation: thinking 1.6s var(--ease-settle) infinite;
  animation-delay: var(--d);
}
@keyframes thinking {
  0%, 70%, 100% { opacity: 0.18; }
  35% { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .thinking i { animation: none; opacity: 0.55; }
}

/* Kept for transcripts rendered before the loader existed. */
.msg__cursor {
  display: inline-block;
  width: 0.5ch;
  height: 1.05em;
  margin-left: 2px;
  vertical-align: -0.15em;
  background: var(--accent);
  animation: caret 1.05s steps(2) infinite;
}
.msg:not(.is-waiting):not(:last-child) .msg__cursor { display: none; }
@keyframes caret { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .msg__cursor { animation: none; opacity: 0.6; } }

/* ----------------------------------------------------------------- dock -- */

.composer-dock {
  position: relative;
  padding: var(--sp-3) var(--sp-5) calc(var(--sp-4) + env(safe-area-inset-bottom));
  background: linear-gradient(to top, var(--bg) 62%, transparent);
}

.suggestions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-2);
  max-width: var(--reading);
  margin: 0 auto var(--sp-3);
}
.suggestions:empty { display: none; }

.suggestion {
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text-muted);
  font-size: var(--step--1);
  transition: background var(--t-fast) var(--ease-out),
              color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-out);
}
.suggestion:hover { background: var(--surface-2); color: var(--text); }
.suggestion:active { transform: scale(0.97); }

.composer-block {
  max-width: var(--reading);
  margin: 0 auto var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-md);
  border: 1px solid color-mix(in srgb, var(--warn) 40%, var(--line));
  background: color-mix(in srgb, var(--warn) 10%, transparent);
  color: var(--text);
  font-size: var(--step--1);
  text-align: center;
}
.composer-block[hidden] { display: none; }

.composer { max-width: var(--reading); margin: 0 auto; }

.composer__attach {
  position: relative;
  width: fit-content;
  margin-bottom: var(--sp-2);
}
.composer__attach img { max-height: 96px; border-radius: var(--r-md); border: 1px solid var(--line); }
.composer__attach-x {
  position: absolute;
  top: -8px; right: -8px;
  display: grid;
  place-items: center;
  width: 24px; height: 24px;
  border-radius: var(--r-pill);
  background: var(--surface-3);
  border: 1px solid var(--line-strong);
  color: var(--text);
}
.composer__attach-x svg { width: 13px; height: 13px; }

/* The pill. It grows in height with the prompt and never in width. */
.composer__pill {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: end;
  gap: var(--sp-2);
  padding: var(--sp-2);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--t-fast) var(--ease-out), box-shadow var(--t-base) var(--ease-out);
}
/* Nothing lights up while typing - no ring, no lift. The caret and the growing
   box already say where focus is, and a pill that changes under every keystroke
   is noise. Keyboard users still get the outline via :focus-visible on the
   textarea itself. */

.composer__plus,
.composer__send {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  border-radius: var(--r-pill);
  transition: background var(--t-fast) var(--ease-out), transform var(--t-fast) var(--ease-out);
}
.composer__plus { color: var(--text-muted); }
.composer__plus:hover { background: var(--surface-2); color: var(--text); }
.composer__plus svg, .composer__send svg { width: 19px; height: 19px; }
.composer__plus:active, .composer__send:active { transform: scale(0.94); }

.composer__send { background: var(--accent); color: #06131a; }
:root[data-theme='light'] .composer__send { color: #fff; }
.composer__send:disabled { background: var(--surface-2); color: var(--text-faint); cursor: default; }
.composer__send.is-stopping { background: var(--text); color: var(--bg); }

.composer__input {
  /* 16px minimum: anything smaller makes Safari on iOS zoom the page on focus. */
  font-size: max(1rem, var(--step-0));
  line-height: 1.5;
  padding: var(--sp-2) 0;
  min-height: 38px;
  max-height: 180px;
  border: 0;
  background: none;
  resize: none;
  overflow-y: auto;
}
.composer__input:disabled { color: var(--text-faint); }

.composer__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-top: var(--sp-2);
  padding: 0 var(--sp-1);
}
.composer__hint {
  min-width: 0;
  font-size: 0.72rem;
  color: var(--text-faint);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* --------------------------------------------------------------- picker -- */

.picker { position: relative; flex: none; }

.picker__button {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  min-height: 34px;
  padding: 0 var(--sp-3);
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-size: var(--step--1);
  transition: background var(--t-fast) var(--ease-out);
}
.picker__button:hover { background: var(--surface-2); }

.picker__dot {
  width: 7px; height: 7px;
  border-radius: var(--r-pill);
  background: var(--text-faint);
  flex: none;
}
.picker__dot[data-state='online'] {
  background: var(--ok);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 22%, transparent);
}

.picker__menu {
  position: absolute;
  right: 0;
  bottom: calc(100% + var(--sp-2));
  width: min(280px, 78vw);
  padding: var(--sp-2);
  display: grid;
  gap: 2px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  transform-origin: bottom right;
  z-index: 20;
}
.picker__menu[hidden] { display: none; }

.picker__item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  width: 100%;
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-sm);
  text-align: left;
  transition: background var(--t-fast) var(--ease-out);
}
.picker__item:hover { background: var(--surface-2); }
.picker__item.is-current { background: var(--accent-soft); }
.picker__body { display: grid; flex: 1; min-width: 0; line-height: 1.3; }
.picker__title { font-size: var(--step--1); font-weight: 500; }
.picker__desc { font-size: 0.7rem; color: var(--text-faint); }
/* Not mono. "gotowy" is a plain word about the model, not a machine reading
   like a token count or an id, and setting it in the data face made it shout. */
.picker__state {
  font-family: var(--font-body);
  font-size: 0.68rem;
  color: var(--text-faint);
}

/* ------------------------------------------------------------------ phone -- */

@media (max-width: 860px) {
  .chat__transcript { padding: var(--sp-4) var(--sp-4) var(--sp-5); }
  .composer-dock { padding: var(--sp-2) var(--sp-4) calc(var(--sp-3) + env(safe-area-inset-bottom)); }
  .chat__hero { min-height: 38vh; padding: var(--sp-6) var(--sp-4) var(--sp-4); }
}
/* ---------------------------------------------------------------- reveal -- */
/*
 * Words arrive out of focus and settle. The answer is complete before any of
 * this runs — the Mac's partial writes are collected rather than painted — so
 * the pace is the app's own and identical on a loaded laptop and an idle one.
 *
 * Blur rather than a slide or a pop: text that sharpens stays readable the
 * whole way through, while text that moves pulls the eye to the motion instead
 * of the sentence.
 */
.msg__body .word-in {
  display: inline-block;
  animation: word-in 380ms var(--ease-out) both;
  will-change: filter, opacity;
}

@keyframes word-in {
  from { opacity: 0; filter: blur(6px); }
  to { opacity: 1; filter: blur(0); }
}

/* The animation is the only thing reduced motion removes here; the text itself
   is already on screen, so there is nothing to fall back to. */
@media (prefers-reduced-motion: reduce) {
  .msg__body .word-in { animation: none; opacity: 1; filter: none; }
}

/* ------------------------------------------------------- plus to menu -- */
/*
 * Transitions.dev's plus-to-menu morph, anchored inside the composer pill.
 *
 * The anchor holds the closed 40px footprint so the pill's layout never moves;
 * the surface itself is absolute and grows up and to the right out of it, which
 * is why it can cover the suggestions above without pushing anything.
 */

:root {
  --morph-open-dur: 350ms;
  --morph-close-dur: 250ms;
  --morph-ease: cubic-bezier(0.34, 1.25, 0.64, 1);
  --morph-close-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --morph-r-closed: 40px;
  --morph-r-open: 20px;
  --morph-fade-dur: 200ms;
  --morph-slide: 40px;
  --morph-rotate: 45deg;
  --morph-scale: 0.97;
  --morph-blur: 2px;
}

.composer__plus-anchor {
  position: relative;
  display: block;
  width: 40px; height: 38px;
  flex: none;
}

/* Closed: a small circular button. Open: a rounded panel.
   Width/height/border-radius animate; the open state uses a
   bouncier ease than the close. */
.t-morph {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--morph-r-closed);
  overflow: hidden;
  z-index: 20;
  transition:
    width var(--morph-close-dur) var(--morph-close-ease),
    height var(--morph-close-dur) var(--morph-close-ease),
    border-radius var(--morph-close-dur) var(--morph-close-ease),
    background var(--morph-close-dur) var(--morph-close-ease),
    box-shadow var(--morph-close-dur) var(--morph-close-ease);
}
.t-morph[data-open="true"] {
  width: 183px;
  height: 172px;
  border-radius: var(--morph-r-open);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-lg);
  transition:
    width var(--morph-open-dur) var(--morph-ease),
    height var(--morph-open-dur) var(--morph-ease),
    border-radius var(--morph-open-dur) var(--morph-ease),
    background var(--morph-open-dur) var(--morph-ease),
    box-shadow var(--morph-open-dur) var(--morph-ease);
}

/* Plus fades + slides out and the icon rotates into an ×. */
.t-morph-plus {
  position: absolute;
  inset: auto 0 0 auto;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border: 0; background: transparent; cursor: pointer;
  transition:
    opacity var(--morph-fade-dur) var(--morph-close-ease),
    transform var(--morph-open-dur) var(--morph-close-ease),
    filter var(--morph-fade-dur) var(--morph-close-ease);
}
.t-morph-plus svg {
  transition: transform var(--morph-open-dur) var(--morph-close-ease);
}
.t-morph[data-open="true"] .t-morph-plus {
  opacity: 0;
  transform: translateX(calc(-1 * var(--morph-slide)));
  filter: blur(var(--morph-blur));
  pointer-events: none;
}
.t-morph[data-open="true"] .t-morph-plus svg {
  transform: scale(var(--morph-scale)) rotate(var(--morph-rotate));
}

/* Menu starts slid in + scaled + blurred; reveals on open. */
.t-morph-menu {
  position: absolute;
  inset: 0;
  padding: var(--sp-2);
  opacity: 0;
  transform: translateX(var(--morph-slide)) scale(var(--morph-scale));
  filter: blur(var(--morph-blur));
  pointer-events: none;
  transition:
    opacity var(--morph-fade-dur) var(--morph-close-ease),
    transform var(--morph-open-dur) var(--morph-close-ease),
    filter var(--morph-fade-dur) var(--morph-close-ease);
}
.t-morph[data-open="true"] .t-morph-menu {
  opacity: 1;
  transform: translateX(0) scale(1);
  filter: blur(0);
  pointer-events: auto;
}

.plus-panel__item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  width: 100%;
  min-height: 42px;
  padding: 0 var(--sp-3);
  border-radius: var(--r-sm);
  color: var(--text);
  font-size: var(--step--1);
  text-align: left;
  transition: background var(--t-fast) var(--ease-out);
}
.plus-panel__item:hover { background: var(--surface-2); }
.plus-panel__item svg { width: 18px; height: 18px; flex: none; color: var(--text-muted); }

@media (prefers-reduced-motion: reduce) {
  .t-morph, .t-morph-plus, .t-morph-menu { transition: none !important; }
}