/* Palette lifted from the source React component's Tailwind classes so the
   look matches without pulling in Tailwind: zinc-800/900/950, white/5 and
   white/10 hairlines, and the indigo-600 -> violet-600 accent gradient. */
:root {
  --zinc-950: #09090b;
  --zinc-900: #18181b;
  --zinc-800: #27272a;
  --white-05: rgba(255, 255, 255, 0.05);
  --white-10: rgba(255, 255, 255, 0.10);
  --white-20: rgba(255, 255, 255, 0.20);
  --white-30: rgba(255, 255, 255, 0.30);
  --white-40: rgba(255, 255, 255, 0.40);
  --white-60: rgba(255, 255, 255, 0.60);
  --indigo-500: #6366f1;
  --indigo-600: #4f46e5;
  --violet-600: #7c3aed;
  --text: #f4f4f5;
  --danger: #f87171;

  /* The component's motion signature: a decelerating ease used on every
     entrance so bubbles settle rather than snap. */
  --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }

body {
  background: var(--zinc-950);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.icon { width: 16px; height: 16px; display: block; }
.icon--sm { width: 14px; height: 14px; }

/* ---- Card ---------------------------------------------------------- */

/* ---- Stage: chat centred, profile panel slides in beside it ---------- */

/* The shift is animated on grid-template-columns rather than a margin or a
   transform: the right column genuinely grows from zero, so the chat is pushed
   left by the layout itself and stays centred against the pair at every frame.
   A transform would slide the chat over the panel instead of beside it. */
.stage {
  display: grid;
  grid-template-columns: minmax(0, 520px) 0px;
  gap: 0;
  align-items: center;
  justify-content: center;
  width: 100%;
  transition:
    grid-template-columns 0.7s var(--ease-out-quint),
    gap 0.7s var(--ease-out-quint);
}
.stage--open { grid-template-columns: minmax(0, 520px) 360px; gap: 20px; }

.profile {
  min-width: 0;
  overflow: hidden;
  opacity: 0;
  transform: translateX(-14px);
  /* Delayed so the column has started opening before the card fades in —
     fading into a zero-width column just looks like a flicker. */
  transition:
    opacity 0.5s var(--ease-out-quint) 0.18s,
    transform 0.5s var(--ease-out-quint) 0.18s;
}
.stage--open .profile { opacity: 1; transform: none; }

.chat {
  width: 100%;
  height: min(720px, calc(100dvh - 48px));
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--white-10);
  border-radius: 16px;
  background: linear-gradient(to bottom, var(--zinc-900), var(--zinc-950));
  box-shadow: 0 24px 64px -16px rgba(0, 0, 0, 0.5);
}
/* Below the two-column breakpoint the panel stacks under the chat and the page
   scrolls, rather than the chat shrinking to make room for it. */
@media (max-width: 1023px) {
  body { align-items: flex-start; }
  .stage {
    grid-template-columns: minmax(0, 520px);
    grid-template-rows: auto 0fr;
    transition: grid-template-rows 0.7s var(--ease-out-quint), gap 0.7s var(--ease-out-quint);
  }
  .stage--open { grid-template-columns: minmax(0, 520px); grid-template-rows: auto 1fr; gap: 16px; }
  .chat { height: min(720px, calc(100dvh - 48px)); }
  .stage--open .chat { height: min(620px, 72dvh); }
  .profile { transform: translateY(-14px); }
}

@media (max-width: 560px) {
  body { padding: 0; }
  .chat { height: 100dvh; border: 0; border-radius: 0; }
  .stage--open .chat { height: 78dvh; }
  .profile { padding: 0 12px 16px; }
}

/* ---- Profile card --------------------------------------------------- */

.profile__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-height: min(720px, calc(100dvh - 48px));
  overflow-y: auto;
  padding: 26px 22px;
  border: 1px solid var(--white-10);
  border-radius: 28px;
  background: rgba(24, 24, 27, 0.6);
  backdrop-filter: blur(20px);
  box-shadow: 0 24px 64px -16px rgba(0, 0, 0, 0.5);
  scrollbar-width: thin;
  scrollbar-color: var(--white-10) transparent;
}
/* Glass sheen, matching the reference's gradient overlay. */
.profile__card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(to bottom right, rgba(255, 255, 255, 0.05), transparent 55%);
  pointer-events: none;
}

.profile__head { display: flex; flex-direction: column; align-items: center; text-align: center; }

.profile__avatar {
  position: relative;
  display: grid;
  place-items: center;
  width: 84px; height: 84px;
  margin-bottom: 16px;
  border-radius: 50%;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #fff;
  background: linear-gradient(135deg, var(--indigo-500), var(--violet-600));
}
/* The reference puts a blurred halo behind the portrait; same idea, no photo. */
.profile__avatar::after {
  content: '';
  position: absolute;
  inset: -14px;
  border-radius: 50%;
  background: rgba(99, 102, 241, 0.35);
  filter: blur(22px);
  z-index: -1;
}

.profile__name { font-size: 19px; font-weight: 600; letter-spacing: -0.01em; color: #fff; }
.profile__role {
  margin-top: 5px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--white-40);
}
.profile__bio { margin-top: 12px; font-size: 13px; line-height: 1.6; color: #a1a1aa; }

.profile__highlights { display: flex; flex-direction: column; gap: 9px; }
.hl {
  padding: 12px 14px;
  border: 1px solid var(--white-10);
  border-radius: 16px;
  background: rgba(39, 39, 42, 0.5);
  transition: transform 0.2s var(--ease-out-quint), border-color 0.2s;
}
.hl:hover { transform: translateY(-3px); border-color: var(--white-20); }
.hl__label {
  font-size: 9.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--white-30);
}
.hl__value { margin-top: 5px; font-size: 12.5px; line-height: 1.55; color: #a1a1aa; }

.profile__links { display: flex; flex-direction: column; gap: 8px; }
.plink {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--white-10);
  border-radius: 16px;
  background: rgba(39, 39, 42, 0.55);
  text-decoration: none;
  transition: transform 0.2s var(--ease-out-quint), border-color 0.2s, background-color 0.2s;
}
.plink:hover {
  transform: translateY(-2px);
  border-color: var(--white-20);
  background: rgba(39, 39, 42, 0.8);
}
.plink:focus-visible { outline: 2px solid var(--indigo-500); outline-offset: 2px; }
.plink__left { display: flex; align-items: center; gap: 10px; min-width: 0; }
.plink__icon {
  display: grid;
  place-items: center;
  flex: none;
  width: 34px; height: 34px;
  border-radius: 50%;
  color: #e4e4e7;
  border: 1px solid var(--white-10);
  background: rgba(24, 24, 27, 0.7);
}
.plink__text { display: flex; flex-direction: column; min-width: 0; }
.plink__label { font-size: 12.5px; font-weight: 600; color: #fff; }
.plink__handle {
  font-size: 11px;
  color: var(--white-40);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.plink__arrow { flex: none; color: var(--white-30); transition: transform 0.2s, color 0.2s; }
.plink:hover .plink__arrow { transform: translate(2px, -2px); color: var(--white-60); }

/* ---- Header -------------------------------------------------------- */

.chat__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--white-05);
}
.chat__id { display: flex; align-items: center; gap: 10px; min-width: 0; }
.chat__idtext { min-width: 0; }

.avatar {
  display: grid;
  place-items: center;
  flex: none;
  width: 28px; height: 28px;
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(135deg, var(--indigo-500), var(--violet-600));
}
.avatar--lg { width: 32px; height: 32px; }

.chat__name {
  display: block;
  font-size: 14px; font-weight: 500;
  color: #fff;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.chat__tagline {
  display: block;
  font-size: 12px;
  color: var(--white-40);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.chat__actions { display: flex; align-items: center; gap: 6px; flex: none; }

.pill {
  font: inherit;
  font-size: 12px;
  color: var(--white-60);
  background: var(--white-05);
  border: 0;
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s, transform 0.12s var(--ease-out-quint);
}
.pill:hover { background: var(--white-10); color: #fff; }
.pill:active { transform: scale(0.95); }
.pill:focus-visible { outline: 2px solid var(--indigo-500); outline-offset: 2px; }

.pill--btn { display: inline-flex; align-items: center; gap: 6px; }
@media (max-width: 430px) {
  .chat__tagline { display: none; }
  .pill--btn span { display: none; }
}

/* ---- Message log --------------------------------------------------- */

.chat__log {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scrollbar-width: thin;
  scrollbar-color: var(--white-10) transparent;
}
/* Anchor a short conversation to the bottom so the first message sits just
   above the composer instead of stranded under a tall empty gap. Done with
   margin-top on the first child rather than justify-content: flex-end, which
   makes overflowing content unreachable above the scroll origin. */
.chat__log > :first-child { margin-top: auto; }

.chat__log::-webkit-scrollbar { width: 6px; }
.chat__log::-webkit-scrollbar-track { background: transparent; }
.chat__log::-webkit-scrollbar-thumb { background: var(--white-10); border-radius: 3px; }

.msg { display: flex; width: 100%; }
.msg--them { justify-content: flex-start; }
.msg--me { justify-content: flex-end; }

.msg__row { display: flex; align-items: flex-end; gap: 8px; max-width: 100%; }
.msg--me .msg__row { flex-direction: row-reverse; }

.bubble {
  max-width: 75%;
  padding: 10px 16px;
  font-size: 14px;
  line-height: 1.6;
  border-radius: 16px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  transition: transform 0.2s ease-out;
}
.bubble:hover { transform: translateY(-1px) scale(1.01); }

.msg--me .bubble {
  border-top-right-radius: 6px;
  color: #fff;
  background: linear-gradient(to right, var(--indigo-600), var(--violet-600));
  box-shadow: 0 8px 24px -4px rgba(99, 102, 241, 0.4);
}
.msg--them .bubble {
  border-top-left-radius: 6px;
  color: #e4e4e7;
  background: rgba(39, 39, 42, 0.9);
  border: 1px solid var(--white-10);
  backdrop-filter: blur(4px);
  box-shadow: 0 4px 12px -2px rgba(0, 0, 0, 0.3);
}
.msg--error .bubble { color: var(--danger); border-color: rgba(248, 113, 113, 0.35); }

/* Entrance: fade up, settle in from the side the bubble belongs to. */
@keyframes msg-in-left {
  from { opacity: 0; transform: translate3d(-20px, 12px, 0) scale(0.96); }
  to   { opacity: 1; transform: translate3d(0, 0, 0) scale(1); }
}
@keyframes msg-in-right {
  from { opacity: 0; transform: translate3d(20px, 12px, 0) scale(0.96); }
  to   { opacity: 1; transform: translate3d(0, 0, 0) scale(1); }
}
.msg--them { animation: msg-in-left 0.35s var(--ease-out-quint) both; }
.msg--me   { animation: msg-in-right 0.35s var(--ease-out-quint) both; }

/* ---- Markdown inside assistant bubbles ------------------------------ */

/* The bubble sets white-space: pre-wrap for plain text, including the
   streaming phase. Rendered Markdown brings its own block structure, so the
   pre-wrap has to be switched off or every source newline doubles as a break. */
.bubble:has(p, ul, ol, table, pre) { white-space: normal; }

.bubble > p { margin: 0 0 8px; }
.bubble > p:last-child { margin-bottom: 0; }
.bubble .md-lead { font-weight: 600; }

.bubble ul,
.bubble ol { margin: 0 0 8px; padding-left: 20px; }
.bubble ul:last-child,
.bubble ol:last-child { margin-bottom: 0; }
.bubble li { margin: 2px 0; }
.bubble li::marker { color: var(--white-30); }

.bubble a { color: var(--indigo-500); text-decoration: underline; text-underline-offset: 2px; }
.bubble a:hover { color: #fff; }

.bubble code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--white-10);
}
.bubble pre {
  margin: 0 0 8px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--white-10);
  overflow-x: auto;
}
.bubble pre:last-child { margin-bottom: 0; }
.bubble pre code { padding: 0; background: none; font-size: 0.85em; }

/* A wide table scrolls inside the bubble instead of stretching it past the
   chat column. */
.md-table { margin: 0 0 8px; overflow-x: auto; }
.md-table:last-child { margin-bottom: 0; }
.bubble table {
  border-collapse: collapse;
  width: 100%;
  font-size: 13px;
  line-height: 1.5;
}
.bubble th,
.bubble td {
  padding: 6px 10px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--white-10);
}
.bubble th {
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
  border-bottom-color: var(--white-20);
}
.bubble td { color: #d4d4d8; }
.bubble tbody tr:last-child th,
.bubble tbody tr:last-child td { border-bottom: 0; }

/* Structured replies need more room than a chat line. */
.msg--them .bubble:has(table) { max-width: 96%; }

/* ---- Typing indicator ---------------------------------------------- */

.typing {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 12px 16px;
  border-radius: 16px;
  border-top-left-radius: 6px;
  background: rgba(39, 39, 42, 0.9);
  border: 1px solid var(--white-10);
  backdrop-filter: blur(4px);
}
.typing i {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--white-60);
  animation: blink 0.8s infinite ease-in-out;
}
.typing i:nth-child(2) { animation-delay: 0.15s; }
.typing i:nth-child(3) { animation-delay: 0.30s; }
@keyframes blink {
  0%, 100% { opacity: 0.4; transform: translateY(0); }
  50%      { opacity: 1;   transform: translateY(-4px); }
}

/* ---- Shortcut chips ------------------------------------------------- */

.chat__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 16px 12px;
}
.chip {
  font: inherit;
  font-size: 12.5px;
  color: var(--white-60);
  background: var(--white-05);
  border: 1px solid var(--white-10);
  border-radius: 999px;
  padding: 6px 12px;
  cursor: pointer;
  animation: msg-in-left 0.35s var(--ease-out-quint) both;
  transition: color 0.15s, border-color 0.15s, background-color 0.15s;
}
.chip:hover {
  color: #fff;
  border-color: rgba(99, 102, 241, 0.6);
  background: rgba(99, 102, 241, 0.12);
}
.chip:focus-visible { outline: 2px solid var(--indigo-500); outline-offset: 2px; }
.chip[disabled] { opacity: 0.4; cursor: default; }

/* ---- Composer ------------------------------------------------------- */

.chat__composer { border-top: 1px solid var(--white-05); padding: 12px; }

.composer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px 6px 16px;
  border: 1px solid var(--white-10);
  border-radius: 12px;
  background: rgba(39, 39, 42, 0.5);
  backdrop-filter: blur(4px);
  transition: border-color 0.15s, background-color 0.15s;
}
.composer:focus-within {
  border-color: var(--white-20);
  background: rgba(39, 39, 42, 0.7);
}
.composer__input {
  flex: 1;
  min-width: 0;
  font: inherit;
  font-size: 14px;
  color: #fff;
  background: transparent;
  border: 0;
  outline: none;
  padding: 6px 0;
}
.composer__input::placeholder { color: var(--white-30); }
.composer__input:disabled { cursor: not-allowed; }

.composer__send {
  flex: none;
  display: grid;
  place-items: center;
  width: 32px; height: 32px;
  border: 0;
  border-radius: 8px;
  color: var(--white-30);
  background: var(--white-05);
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s, transform 0.12s var(--ease-out-quint);
}
.composer__send:not(:disabled) { color: #fff; background: var(--indigo-600); }
.composer__send:not(:disabled):hover { background: var(--indigo-500); transform: scale(1.08); }
.composer__send:not(:disabled):active { transform: scale(0.92); }
.composer__send:disabled { cursor: not-allowed; }
.composer__send:focus-visible { outline: 2px solid var(--indigo-500); outline-offset: 2px; }

.chat__note {
  padding-top: 8px;
  font-size: 11px;
  color: var(--white-30);
  text-align: center;
  min-height: 1em;
}

/* ---- Motion preferences --------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .msg--them, .msg--me, .chip { animation: none; }
  .stage, .profile { transition: none; }
  .hl:hover, .plink:hover, .plink:hover .plink__arrow { transform: none; }
  .typing i { animation: none; opacity: 0.6; }
  .bubble:hover, .pill:active,
  .composer__send:not(:disabled):hover,
  .composer__send:not(:disabled):active { transform: none; }
  .chat__log { scroll-behavior: auto; }
}