/* Chat page */
/* =============================
   AI Chat
============================= */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.chat-main {
  padding-top: 52px;
}

.chat-hero {
  border-radius: var(--radius-xl);
  padding: clamp(30px, 4rem, 54px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.34fr);
  gap: 24px;
  align-items: end;
}

.chat-hero h1 {
  font-size: 68px;
}

.chat-hero p {
  max-width: 780px;
  margin: 22px 0 0;
  color: var(--text-muted);
  font-size: 18px;
  line-height: 1.8;
}

.chat-model-card {
  position: relative;
  z-index: 1;
  padding: 22px;
  border: 1px solid var(--control-border);
  border-radius: var(--radius-xl);
  color: #12333b;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.70), rgba(235, 248, 245, 0.52)),
    rgba(255, 255, 255, 0.64);
  box-shadow: var(--control-shadow);
}

.chat-model-card span,
.chat-model-card strong {
  display: block;
}

.chat-model-card span {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.chat-model-card strong {
  margin-top: 9px;
  font-size: 22px;
}

.chat-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.34fr);
  gap: 20px;
  align-items: start;
}

.chat-shell {
  height: clamp(560px, 72vh, 740px);
  min-height: 0;
  border-radius: var(--radius-xl);
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  overflow: hidden;
}

.chat-toolbar {
  position: relative;
  z-index: 2;
  padding: 18px 20px;
  border-bottom: 1px solid rgba(71, 85, 105, 0.18);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.chat-toolbar span,
.chat-toolbar strong {
  display: block;
}

.chat-toolbar span {
  font-size: 14px;
  font-weight: 900;
}

.chat-toolbar strong {
  margin-top: 4px;
  color: var(--primary-dark);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.chat-toolbar-main {
  min-width: 0;
}

.chat-persona-current {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.chat-persona-current > span:last-child {
  min-width: 0;
}

.chat-persona-current #chatPersonaName {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-persona-avatar {
  flex-basis: 40px;
  width: 40px;
  height: 40px;
  overflow: hidden;
}

.chat-persona-avatar img,
.chat-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.chat-persona-strip {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 8px;
  padding: 10px 16px;
  border-bottom: 1px solid rgba(71, 85, 105, 0.14);
  overflow-x: auto;
  scrollbar-width: none;
}

.chat-persona-strip::-webkit-scrollbar {
  display: none;
}

.chat-persona-chip {
  flex: 0 0 auto;
  display: inline-grid;
  grid-template-columns: 30px minmax(0, auto);
  gap: 8px;
  align-items: center;
  max-width: 220px;
  min-height: 42px;
  padding: 6px 12px 6px 6px;
  border: 1px solid var(--control-border);
  border-radius: 999px;
  color: #12333b;
  background:
    linear-gradient(145deg, rgba(255,255,255,0.68), rgba(235,248,245,0.48)),
    rgba(255,255,255,0.58);
  box-shadow: var(--control-shadow);
  cursor: pointer;
  font: inherit;
  font-weight: 900;
}

.chat-persona-chip img,
.chat-persona-chip .chat-persona-chip-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  object-fit: cover;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, #0f766e, #2563eb);
  font-size: 11px;
}

.chat-persona-chip span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-persona-chip.is-active {
  border-color: rgba(15, 118, 110, 0.45);
  background:
    linear-gradient(135deg, rgba(20, 184, 166, 0.22), rgba(37, 99, 235, 0.16)),
    rgba(255,255,255,0.72);
}

.chat-icon-btn {
  width: 38px;
  height: 38px;
  border: 1px solid var(--control-border);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
  color: #0f172a;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.80), rgba(235, 248, 245, 0.56)),
    var(--control-bg);
  box-shadow: var(--control-shadow);
  cursor: pointer;
  font-size: 24px;
  line-height: 1;
  transition: 0.25s ease;
}

.chat-icon-btn:hover {
  transform: translateY(-1px);
  border-color: var(--control-border-hover);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.88), rgba(228, 246, 242, 0.64)),
    var(--control-bg-hover);
}

.chat-options {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: calc(100% + 12px);
  z-index: 5;
  padding: 12px;
  border: 1px solid rgba(71, 85, 105, 0.16);
  border-radius: var(--radius-xl);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.86), rgba(235, 248, 245, 0.72)),
    rgba(255, 255, 255, 0.84);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.78),
    0 18px 40px rgba(15, 23, 42, 0.14);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px) scale(0.98);
  transform-origin: bottom left;
  transition:
    opacity 0.2s ease,
    transform 0.22s ease;
}

.chat-options.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.chat-option {
  min-height: 38px;
  padding: 7px 12px 7px 8px;
  border: 1px solid var(--control-border);
  border-radius: var(--radius-lg);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #12333b;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.72), rgba(235, 248, 245, 0.50)),
    rgba(255, 255, 255, 0.62);
  box-shadow: var(--control-shadow);
  cursor: pointer;
  font-size: 13px;
  font-weight: 900;
  line-height: 1;
  user-select: none;
}

.chat-option input {
  width: 18px;
  height: 18px;
  accent-color: #0f766e;
  cursor: pointer;
}

.chat-log {
  position: relative;
  z-index: 1;
  min-height: 0;
  padding: 22px;
  overflow-y: scroll;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
}

.chat-log::-webkit-scrollbar {
  width: 10px;
}

.chat-log::-webkit-scrollbar-track {
  background: rgba(15, 23, 42, 0.04);
  border-radius: 999px;
}

.chat-log::-webkit-scrollbar-thumb {
  border: 2px solid transparent;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.34);
  background-clip: padding-box;
}

.chat-log::-webkit-scrollbar-thumb:hover {
  background: rgba(8, 145, 178, 0.48);
  background-clip: padding-box;
}

.chat-message {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  max-width: 82%;
}

.chat-message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.chat-message.source-message {
  max-width: min(72%, 680px);
  margin-top: -8px;
}

.chat-message.source-message .chat-avatar {
  opacity: 0;
}

.chat-message.source-message .chat-bubble {
  border-radius: var(--radius-lg);
  color: var(--text-muted);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.52), rgba(235, 248, 245, 0.34)),
    rgba(255, 255, 255, 0.46);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.06);
  font-size: 13px;
}

.chat-avatar {
  flex: 0 0 38px;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-lg);
  display: grid;
  place-items: center;
  color: #ffffff;
  background: linear-gradient(135deg, #0f766e, #2563eb);
  font-size: 13px;
  font-weight: 900;
}

.chat-avatar.is-image {
  overflow: hidden;
  background: rgba(255, 255, 255, 0.56);
  color: transparent;
}

.chat-message.user .chat-avatar {
  background: linear-gradient(135deg, #e11d48, #f59e0b);
}

.chat-bubble {
  padding: 14px 16px;
  border: 1px solid var(--control-border);
  border-radius: var(--radius-lg);
  border-top-left-radius: 6px;
  color: #203043;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.70), rgba(235, 248, 245, 0.52)),
    rgba(255, 255, 255, 0.68);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.74),
    0 10px 24px rgba(15, 23, 42, 0.08);
}

.chat-message.user .chat-bubble {
  border-top-left-radius: 18px;
  border-top-right-radius: 6px;
  color: #ffffff;
  border-color: rgba(14, 116, 144, 0.52);
  background: linear-gradient(135deg, #0f766e, #0891b2);
}

.reasoning-box {
  margin: 0 0 12px;
  border: 1px solid rgba(100, 116, 139, 0.28);
  border-radius: 12px;
  color: #64748b;
  background: rgba(100, 116, 139, 0.10);
  overflow: hidden;
}

.reasoning-box summary {
  min-height: 36px;
  padding: 9px 12px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 900;
  line-height: 1.3;
  user-select: none;
}

.reasoning-body {
  max-height: 220px;
  padding: 0 12px 12px;
  overflow-y: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 13px;
  line-height: 1.7;
}

.chat-content p {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.76;
}

.chat-content p + p,
.chat-content ul,
.chat-content ol,
.chat-content blockquote,
.chat-content .code-block {
  margin-top: 12px;
}

.chat-content h1,
.chat-content h2,
.chat-content h3 {
  margin: 0 0 10px;
  font-size: 18px;
  line-height: 1.35;
}

.chat-content ul,
.chat-content ol {
  padding-left: 22px;
}

.chat-content li {
  margin: 6px 0;
  line-height: 1.68;
}

.chat-content blockquote {
  padding: 10px 12px;
  border-left: 3px solid rgba(8, 145, 178, 0.7);
  border-radius: 10px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.36);
}

.chat-content a {
  color: #0f5f73;
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.chat-content code {
  padding: 2px 6px;
  border-radius: 7px;
  color: #0f172a;
  background: rgba(15, 23, 42, 0.08);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

.code-block {
  overflow: hidden;
  border: 1px solid rgba(15, 23, 42, 0.12);
  border-radius: var(--radius-lg);
  background: #0d1724;
}

.code-toolbar {
  min-height: 38px;
  padding: 8px 10px 8px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: #dbeafe;
  background: rgba(255, 255, 255, 0.06);
  font-size: 12px;
  font-weight: 800;
}

.code-copy {
  min-width: 54px;
  min-height: 28px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 9px;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.10);
  cursor: pointer;
  font-size: 12px;
  font-weight: 900;
}

.code-copy:hover {
  background: rgba(255, 255, 255, 0.18);
}

.code-block pre {
  margin: 0;
  padding: 14px;
  overflow-x: auto;
}

.code-block pre code {
  display: block;
  padding: 0;
  color: #e5eefb;
  background: transparent;
  line-height: 1.65;
  white-space: pre;
}

.chat-message.is-loading .chat-content p::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-left: 6px;
  border-radius: 999px;
  background: currentColor;
  animation: chatPulse 1s infinite ease-in-out;
}

.chat-form {
  position: relative;
  z-index: 4;
  padding: 16px;
  border-top: 1px solid rgba(71, 85, 105, 0.18);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: end;
  overflow: visible;
}

.chat-tools-toggle {
  width: 48px;
  height: 48px;
  border: 1px solid var(--control-border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  color: #0f172a;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.78), rgba(235, 248, 245, 0.56)),
    var(--control-bg);
  box-shadow: var(--control-shadow);
  cursor: pointer;
  font-size: 13px;
  font-weight: 1000;
  line-height: 1;
  transition:
    transform 0.22s ease,
    border-color 0.22s ease,
    background 0.22s ease;
}

.chat-tools-toggle:hover,
.chat-tools-toggle[aria-expanded="true"] {
  transform: translateY(-1px);
  border-color: var(--control-border-hover);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.88), rgba(228, 246, 242, 0.64)),
    var(--control-bg-hover);
}

.chat-form textarea {
  width: 100%;
  min-height: 48px;
  max-height: 160px;
  padding: 13px 16px;
  border: 1px solid var(--control-border);
  border-radius: var(--radius-xl);
  resize: none;
  color: var(--text-main);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.68), rgba(242, 250, 248, 0.58)),
    rgba(255, 255, 255, 0.70);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.70),
    inset 0 2px 8px rgba(15, 23, 42, 0.04);
  font: inherit;
  line-height: 1.5;
}

.chat-form textarea::placeholder {
  color: var(--text-muted);
}

.chat-send {
  min-width: 92px;
  border: 0;
  cursor: pointer;
}

.chat-send:disabled,
.chat-form textarea:disabled {
  cursor: wait;
  opacity: 0.72;
}

.chat-side {
  position: sticky;
  top: 110px;
  max-width: 420px;
  justify-self: stretch;
}

.chat-side h2 {
  position: relative;
  z-index: 1;
  margin: 0 0 18px;
}

.prompt-note {
  position: relative;
  z-index: 1;
  margin: -6px 0 18px;
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.6;
}

.prompt-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 10px;
}

.prompt-list button {
  width: 100%;
  position: relative;
  overflow: hidden;
  padding: 13px 14px;
  border: 1px solid var(--control-border);
  border-radius: var(--radius-lg);
  color: #12333b;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.70), rgba(235, 248, 245, 0.52)),
    rgba(255, 255, 255, 0.64);
  box-shadow: var(--control-shadow);
  cursor: pointer;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.45;
  text-align: left;
  transition: 0.25s ease;
}

.prompt-list button:hover {
  transform: translateY(-1px);
  border-color: var(--control-border-hover);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.82), rgba(228, 246, 242, 0.64)),
    var(--control-bg-hover);
}

/* Modern AI chat refinements */
.chat-shell {
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.74), rgba(246,251,250,0.64)),
    rgba(255,255,255,0.70);
}

.chat-toolbar,
.chat-persona-strip,
.chat-form {
  background: rgba(255,255,255,0.42);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
}

.chat-log {
  gap: 20px;
  padding: 26px clamp(18px, 3vw, 34px);
  background:
    linear-gradient(180deg, rgba(248,250,252,0.34), rgba(255,255,255,0)),
    rgba(255,255,255,0.16);
}

.chat-message {
  width: min(100%, 860px);
  max-width: none;
}

.chat-message.assistant {
  align-self: flex-start;
}

.chat-message.user {
  width: min(100%, 760px);
  align-self: flex-end;
}

.chat-message.source-message {
  width: min(100%, 720px);
  max-width: none;
}

.chat-avatar {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
}

.chat-bubble {
  min-width: 0;
  max-width: 100%;
  padding: 15px 17px;
  border-radius: 18px;
  border-top-left-radius: 8px;
  color: #111827;
  background: rgba(255,255,255,0.86);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.78),
    0 10px 28px rgba(15,23,42,0.07);
  font-size: 15.5px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.chat-message.assistant .chat-bubble {
  width: min(100%, 780px);
}

.chat-message.user .chat-bubble {
  border-radius: 18px;
  border-top-right-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, #0f766e, #2563eb);
  box-shadow: 0 12px 28px rgba(37,99,235,0.18);
}

.chat-message.user .chat-content strong,
.chat-message.user .chat-content em,
.chat-message.user .chat-content h1,
.chat-message.user .chat-content h2,
.chat-message.user .chat-content h3 {
  color: #fff;
}

.chat-message.source-message .chat-bubble {
  width: min(100%, 680px);
  padding: 12px 14px;
  border-radius: 15px;
  background: rgba(248,250,252,0.78);
}

.chat-content {
  min-width: 0;
}

.chat-content p {
  line-height: 1.78;
}

.chat-content h1,
.chat-content h2,
.chat-content h3 {
  margin: 4px 0 12px;
  color: #0f172a;
  font-weight: 850;
  letter-spacing: 0;
}

.chat-content h1 { font-size: 22px; }
.chat-content h2 { font-size: 19px; }
.chat-content h3 { font-size: 17px; }

.chat-content ul,
.chat-content ol {
  margin: 10px 0 0;
  padding-left: 1.4em;
}

.chat-content li {
  margin: 5px 0;
}

.chat-content li > p {
  display: inline;
}

.chat-content strong {
  color: #0f172a;
  font-weight: 850;
}

.chat-content em {
  color: #334155;
}

.chat-content hr {
  height: 1px;
  margin: 16px 0;
  border: 0;
  background: rgba(15,23,42,0.12);
}

.chat-content blockquote {
  margin: 12px 0 0;
  padding: 10px 13px;
  border-left: 4px solid rgba(37,99,235,0.56);
  border-radius: 12px;
  background: rgba(37,99,235,0.07);
}

.chat-content code {
  color: #0f172a;
  background: rgba(15,23,42,0.08);
  font-size: 0.9em;
}

.chat-table-wrap {
  width: 100%;
  margin-top: 12px;
  overflow-x: auto;
  border: 1px solid rgba(15,23,42,0.10);
  border-radius: 14px;
  background: rgba(255,255,255,0.72);
}

.chat-table-wrap table {
  width: 100%;
  border-collapse: collapse;
  min-width: 460px;
}

.chat-table-wrap th,
.chat-table-wrap td {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(15,23,42,0.08);
  vertical-align: top;
}

.chat-table-wrap th {
  color: #0f172a;
  background: rgba(15,118,110,0.08);
  font-weight: 850;
}

.chat-table-wrap tr:last-child td {
  border-bottom: 0;
}

.code-block {
  margin-top: 14px;
  border-radius: 16px;
  border-color: rgba(15,23,42,0.16);
  box-shadow: 0 16px 34px rgba(15,23,42,0.14);
}

.code-block pre {
  font-size: 13.5px;
  line-height: 1.72;
}

.chat-form {
  align-items: end;
  padding: 14px 16px 16px;
}

.chat-form textarea {
  min-height: 50px;
  border-radius: 18px;
  background: rgba(255,255,255,0.82);
  font-size: 15px;
  line-height: 1.55;
}

.chat-tools-toggle,
.chat-send {
  min-height: 50px;
  border-radius: 16px;
}

:root[data-theme="dark"] .chat-shell {
  background: rgba(8, 18, 28, 0.72);
}

:root[data-theme="dark"] .chat-toolbar,
:root[data-theme="dark"] .chat-persona-strip,
:root[data-theme="dark"] .chat-form {
  background: rgba(8, 18, 28, 0.52);
}

:root[data-theme="dark"] .chat-bubble {
  color: #e0f2fe;
  background: rgba(15, 23, 42, 0.78);
  border-color: rgba(255,255,255,0.10);
}

:root[data-theme="dark"] .chat-content h1,
:root[data-theme="dark"] .chat-content h2,
:root[data-theme="dark"] .chat-content h3,
:root[data-theme="dark"] .chat-content strong {
  color: #f8fafc;
}

:root[data-theme="dark"] .chat-content em {
  color: #bae6fd;
}

:root[data-theme="dark"] .chat-table-wrap {
  border-color: rgba(255,255,255,0.10);
  background: rgba(15,23,42,0.54);
}

:root[data-theme="dark"] .chat-table-wrap th {
  color: #f8fafc;
  background: rgba(56,189,248,0.14);
}

:root[data-theme="dark"] .chat-table-wrap th,
:root[data-theme="dark"] .chat-table-wrap td {
  border-bottom-color: rgba(255,255,255,0.08);
}

/* Conversation density + readability pass */
.chat-layout {
  grid-template-columns: minmax(0, 1.18fr) minmax(240px, 0.28fr);
  gap: 18px;
}

.chat-shell {
  height: clamp(660px, calc(100svh - 126px), 880px);
}

.chat-toolbar {
  padding: 14px 18px;
}

.chat-persona-strip {
  padding: 8px 14px;
}

.chat-log {
  gap: 12px;
  padding: 18px clamp(16px, 2.4vw, 28px);
}

.chat-message {
  width: min(100%, 920px);
  gap: 10px;
}

.chat-message.user {
  width: min(100%, 820px);
}

.chat-avatar {
  flex: 0 0 30px;
  width: 30px;
  height: 30px;
  font-size: 12px;
}

.chat-bubble {
  padding: 12px 15px;
  font-size: 15px;
  line-height: 1.68;
}

.chat-message.assistant .chat-bubble {
  width: min(100%, 840px);
}

.chat-message.user .chat-bubble {
  min-width: 58px;
  padding: 11px 15px;
  color: #ffffff;
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.98), rgba(29, 78, 216, 0.98));
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: 0 12px 28px rgba(29,78,216,0.22);
}

.chat-message.user .chat-content,
.chat-message.user .chat-content p,
.chat-message.user .chat-content li,
.chat-message.user .chat-content code {
  color: #ffffff;
}

.chat-message.user .chat-content p {
  font-weight: 780;
  line-height: 1.55;
}

.chat-message.user .chat-avatar {
  color: #ffffff;
  background: linear-gradient(135deg, #ef4444, #f97316);
  box-shadow: 0 8px 18px rgba(249, 115, 22, 0.22);
}

.chat-content p {
  line-height: 1.68;
}

.chat-content p + p,
.chat-content ul,
.chat-content ol,
.chat-content blockquote,
.chat-content .code-block,
.chat-content .chat-table-wrap {
  margin-top: 9px;
}

.chat-form {
  padding: 12px 14px;
  gap: 10px;
}

.chat-form textarea {
  min-height: 46px;
  padding: 11px 14px;
}

.chat-tools-toggle,
.chat-send {
  min-height: 46px;
}

@keyframes chatPulse {
  0%,
  100% {
    opacity: 0.25;
    transform: translateY(0);
  }

  50% {
    opacity: 1;
    transform: translateY(-2px);
  }
}

@media (max-width: 920px) {
  .chat-hero,
  .chat-layout {
    grid-template-columns: 1fr;
  }

  .chat-shell {
    height: min(760px, calc(100svh - 108px));
  }

  .chat-hero h1 {
    font-size: 56px;
  }

  .chat-side {
    position: static;
    max-width: none;
  }
}

@media (max-width: 640px) {
  .chat-main {
    padding-top: 34px;
  }

  .chat-hero {
    padding: 28px 20px;
  }

  .chat-hero h1 {
    font-size: 42px;
  }

  .chat-hero p {
    font-size: 16px;
  }

  .chat-shell {
    height: min(760px, calc(100svh - 92px));
    min-height: 560px;
  }

  .chat-log {
    padding: 16px 12px;
  }

  .chat-message {
    max-width: 100%;
    width: 100%;
    gap: 9px;
  }

  .chat-message.user {
    width: 100%;
  }

  .chat-message.assistant .chat-bubble,
  .chat-message.user .chat-bubble {
    width: auto;
    max-width: calc(100vw - 68px);
    font-size: 15px;
  }

  .chat-form {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 10px;
    padding: 14px;
  }

  .chat-options {
    left: 14px;
    right: 14px;
    bottom: calc(100% + 10px);
  }

  .chat-tools-toggle {
    width: 46px;
    height: 46px;
  }

  .chat-send {
    width: auto;
    min-width: 76px;
  }
}

/* ============================================================
   Assistant composer redesign — 2026-06-04
   ChatGPT-style input + capability chips, matched to site glass.
   ============================================================ */
.chat-composer {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px 12px 10px;
  border: 1px solid var(--glass-border);
  border-radius: 22px;
  background: var(--surface-strong);
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.55);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  backdrop-filter: blur(20px) saturate(150%);
}
:root[data-theme="dark"] .chat-composer {
  background: rgba(16, 23, 32, 0.72);
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.chat-composer textarea {
  width: 100%;
  border: 0;
  outline: 0;
  resize: none;
  background: transparent;
  color: var(--text-main);
  font: inherit;
  font-size: 16px;
  line-height: 1.55;
  max-height: 200px;
  min-height: 28px;
  padding: 6px 8px 2px;
}
.chat-composer textarea::placeholder {
  color: var(--text-muted);
}

.chat-composer-bar {
  display: flex;
  align-items: center;
  gap: 10px;
}

.chat-caps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  flex: 1 1 auto;
  min-width: 0;
}

.chat-cap {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 36px;
  padding: 0 14px 0 12px;
  border: 1px solid var(--control-border);
  border-radius: 999px;
  background: var(--control-bg);
  color: var(--text-muted);
  font-size: 13.5px;
  font-weight: 750;
  cursor: pointer;
  user-select: none;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.chat-cap input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}
.chat-cap-icon {
  display: inline-flex;
}
.chat-cap-icon svg {
  width: 17px;
  height: 17px;
}
.chat-cap:hover {
  border-color: var(--control-border-hover);
  color: var(--text-main);
}
.chat-cap:has(input:checked) {
  background: color-mix(in srgb, var(--primary) 16%, transparent);
  border-color: color-mix(in srgb, var(--primary) 52%, transparent);
  color: var(--primary);
}
.chat-cap:focus-within {
  outline: 2px solid color-mix(in srgb, var(--primary) 55%, transparent);
  outline-offset: 2px;
}
/* Deep-thinking chip gets a gentle pulse while active */
.chat-cap[data-cap="think"]:has(input:checked) .chat-cap-icon {
  animation: chatCapPulse 1.8s ease-in-out infinite;
}
@keyframes chatCapPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.88); }
}
@media (prefers-reduced-motion: reduce) {
  .chat-cap[data-cap="think"]:has(input:checked) .chat-cap-icon { animation: none; }
}

.chat-send {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 8px 20px color-mix(in srgb, var(--primary) 30%, transparent);
  transition: transform 0.15s ease, background 0.18s ease, opacity 0.18s ease;
}
.chat-send:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}
.chat-send:active {
  transform: translateY(0) scale(0.96);
}
.chat-send:disabled {
  opacity: 0.4;
  cursor: default;
  transform: none;
  box-shadow: none;
}
.chat-send-icon {
  display: inline-flex;
}
.chat-send-icon svg {
  width: 20px;
  height: 20px;
}

/* Phones: hide chip labels, keep icons → compact bar */
@media (max-width: 560px) {
  .chat-cap {
    padding: 0 11px;
    gap: 0;
  }
  .chat-cap-label {
    display: none;
  }
}

/* ---- Thinking / sources polish ---- */
.reasoning-box {
  border-radius: 14px;
  border: 1px solid color-mix(in srgb, var(--primary) 22%, var(--glass-border));
  background: color-mix(in srgb, var(--primary) 6%, transparent);
}
.reasoning-box summary {
  font-weight: 800;
}
.reasoning-box summary::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--primary);
  vertical-align: middle;
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--primary) 60%, transparent);
  animation: chatThinkDot 1.6s ease-out infinite;
}
@keyframes chatThinkDot {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--primary) 55%, transparent); }
  70% { box-shadow: 0 0 0 7px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* ============================================================
   Chat dark-mode background fix + cleaner send button — 2026-06-04b
   ============================================================ */

/* The message log had a hard-coded light panel → washed out in dark.
   Make it transparent/subtle so it inherits the dark shell. */
:root[data-theme="dark"] .chat-log {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0));
}
:root[data-theme="dark"] .chat-hero,
:root[data-theme="dark"] .chat-side {
  background: rgba(10, 18, 27, 0.6);
  border-color: rgba(255, 255, 255, 0.08);
}

/* Send button: neutral monochrome (the bright teal circle looked odd).
   Light: near-black circle + white arrow. Dark: white circle + dark arrow. */
.chat-send {
  width: 40px;
  height: 40px;
  background: #14304f;
  color: #fff;
  box-shadow: none;
}
.chat-send:hover {
  background: #0c1f36;
  transform: translateY(-1px);
}
.chat-send:active {
  transform: translateY(0) scale(0.95);
}
.chat-send-icon svg {
  width: 19px;
  height: 19px;
}
:root[data-theme="dark"] .chat-send {
  background: #eef4fb;
  color: #0c1620;
}
:root[data-theme="dark"] .chat-send:hover {
  background: #ffffff;
}
/* Dim the send button while the input is empty (ChatGPT-style affordance) */
.chat-composer:has(textarea:placeholder-shown) .chat-send {
  opacity: 0.4;
}

/* Force the send button to a true circle (base rule set min-width:92px). */
.chat-send {
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  border-radius: 50%;
  flex: 0 0 auto;
}