/* ── Keyframes ──────────────────────────────────────────────────────────── */

@keyframes kol-msg-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes kol-dots {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

@keyframes kol-pulse-ring {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--md-primary-fg-color) 45%, transparent); }
  70%  { box-shadow: 0 0 0 14px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

@keyframes kol-status-blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

/* ── Root ───────────────────────────────────────────────────────────────── */

.kol-chat {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 20;
  font: inherit;
}

/* ── FAB Toggle (只负责打开) ─────────────────────────────────────────── */

.kol-chat__toggle {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  font-size: 0;
  cursor: pointer;
  box-shadow:
    0 2px 8px rgba(0, 0, 0, .20),
    0 6px 20px rgba(0, 0, 0, .14);
  transition: transform .18s ease, box-shadow .18s ease;
  z-index: 2;
}

/* Hide FAB when panel is open */
.kol-chat__panel--open ~ .kol-chat__toggle {
  display: none;
}

/* FAB icon */
.kol-chat__toggle svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: currentColor;
}

/* Pulse ring on first load (3×) */
.kol-chat__toggle::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  pointer-events: none;
  animation: kol-pulse-ring 2s ease-out 3;
}

.kol-chat__toggle:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow:
    0 4px 12px rgba(0, 0, 0, .24),
    0 10px 30px rgba(0, 0, 0, .18);
}

.kol-chat__toggle:active {
  transform: scale(.93);
  box-shadow: 0 1px 4px rgba(0, 0, 0, .18);
}

.kol-chat__toggle:focus-visible {
  outline: 2.5px solid var(--md-accent-fg-color);
  outline-offset: 3px;
}

/* ── Panel ─────────────────────────────────────────────────────────────── */

.kol-chat__panel {
  position: absolute;
  right: 0;
  bottom: 0;
  display: flex;
  width: min(30rem, calc(100vw - 2.5rem));
  height: min(36rem, calc(100vh - 6rem));
  overflow: hidden;
  flex-direction: column;
  border: 1px solid color-mix(in srgb, var(--md-default-fg-color) 12%, transparent);
  border-radius: 16px;
  background: var(--md-default-bg-color);
  box-shadow:
    0 8px 24px rgba(0, 0, 0, .12),
    0 20px 60px rgba(0, 0, 0, .18);
  opacity: 0;
  transform: translateY(15px) scale(.95);
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity .25s cubic-bezier(0.34, 1.56, 0.64, 1),
    transform .25s cubic-bezier(0.34, 1.56, 0.64, 1),
    visibility .25s;
  z-index: 1;
  will-change: opacity, transform;
  backface-visibility: hidden;
  transform-style: preserve-3d;
}

.kol-chat__panel--open {
  opacity: 1;
  transform: translateY(0) scale(1);
  visibility: visible;
  pointer-events: auto;
}

/* Expanded full-screen state */
.kol-chat__panel--expanded {
  position: fixed !important;
  top: 1rem !important;
  right: 1rem !important;
  bottom: 1rem !important;
  left: 1rem !important;
  width: auto !important;
  height: auto !important;
  max-width: none !important;
  max-height: none !important;
  border-radius: 16px !important;
}

/* Hide resizers in expanded full-screen state */
.kol-chat__panel--expanded .kol-chat__resizer {
  display: none !important;
}

/* ── Panel Resizers ─────────────────────────────────────────────────────── */

.kol-chat__resizer {
  position: absolute;
  z-index: 30;
}

.kol-chat__resizer--n {
  top: 0;
  left: 8px;
  right: 8px;
  height: 6px;
  cursor: ns-resize;
}

.kol-chat__resizer--w {
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 6px;
  cursor: ew-resize;
}

.kol-chat__resizer--nw {
  top: 0;
  left: 0;
  width: 12px;
  height: 12px;
  cursor: nwse-resize;
  z-index: 31;
}

@media (max-width: 44rem) {
  .kol-chat__resizer {
    display: none !important;
  }
}


/* ── Header ─────────────────────────────────────────────────────────────── */

.kol-chat__header {
  position: relative;
  z-index: 6;
  display: flex;
  min-height: 3.2rem;
  flex-shrink: 0;
  align-items: center;
  justify-content: space-between;
  padding: 0 .6rem 0 1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--md-default-fg-color) 8%, transparent);
}

/* Access gate：未授权时覆盖在 messages/form 之上 */
/* Access gate styling */
.kol-chat__gate {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: color-mix(in srgb, var(--md-default-bg-color) 85%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: opacity .25s ease, visibility .25s ease;
}

@keyframes kol-gate-fade-in {
  from { opacity: 0; transform: scale(1.02); }
  to { opacity: 1; transform: scale(1); }
}

.kol-chat__gate[hidden] {
  display: none !important;
}

.kol-chat__gate-card {
  width: 100%;
  max-width: 16.5rem;
  text-align: center;
  padding: 1.5rem;
  background: color-mix(in srgb, var(--md-default-bg-color) 60%, var(--md-default-fg-color) 2%);
  border: 1px solid color-mix(in srgb, var(--md-default-fg-color) 8%, transparent);
  border-radius: 20px;
  box-shadow: 
    0 10px 30px color-mix(in srgb, var(--md-default-fg-color) 4%, transparent),
    0 1px 3px color-mix(in srgb, var(--md-default-fg-color) 2%, transparent);
  animation: kol-gate-fade-in .3s cubic-bezier(0.34, 1.56, 0.64, 1);
}


.kol-chat__gate-icon-wrapper {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 14px;
  background: color-mix(in srgb, var(--md-accent-fg-color) 10%, transparent);
  color: var(--md-accent-fg-color);
  margin-bottom: 0.9rem;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--md-accent-fg-color) 12%, transparent);
}

.kol-chat__gate-icon-wrapper svg {
  width: 1.3rem;
  height: 1.3rem;
  stroke: currentColor;
  stroke-width: 2px;
}

.kol-chat__gate-title {
  font-size: .8rem;
  font-weight: 700;
  color: var(--md-default-fg-color);
  margin-bottom: .3rem;
  letter-spacing: 0.02em;
}

.kol-chat__gate-desc {
  font-size: .62rem;
  color: var(--md-default-fg-color--light);
  margin-bottom: 1.1rem;
  line-height: 1.5;
}

.kol-chat__gate-form {
  display: flex;
  flex-direction: column;
  gap: .6rem;
}

.kol-chat__gate-input {
  width: 100%;
  padding: .5rem .75rem;
  border: 1.5px solid color-mix(in srgb, var(--md-default-fg-color) 12%, transparent);
  border-radius: 12px;
  font: inherit;
  font-size: .65rem;
  background: color-mix(in srgb, var(--md-default-fg-color) 2%, var(--md-default-bg-color));
  color: var(--md-default-fg-color);
  text-align: center;
  transition: border-color .15s ease, box-shadow .15s ease, background-color .15s ease;
}

.kol-chat__gate-input:focus {
  outline: none;
  border-color: var(--md-accent-fg-color);
  background: var(--md-default-bg-color);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--md-accent-fg-color) 15%, transparent);
}

.kol-chat__gate-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .3rem;
  padding: .5rem 1.1rem;
  border: 0;
  border-radius: 12px;
  background: var(--md-accent-fg-color);
  color: var(--md-primary-bg-color);
  font-size: .65rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 3px 8px color-mix(in srgb, var(--md-accent-fg-color) 25%, transparent);
  transition: opacity .15s ease, transform .15s ease, box-shadow .15s ease;
}

.kol-chat__gate-submit:hover:not(:disabled) {
  opacity: .95;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--md-accent-fg-color) 35%, transparent);
}

.kol-chat__gate-submit:active:not(:disabled) {
  transform: scale(.97);
}

.kol-chat__gate-submit:disabled {
  opacity: .6;
  cursor: not-allowed;
  box-shadow: none;
}

.kol-chat__gate-submit svg {
  width: .7rem;
  height: .7rem;
  stroke: currentColor;
  stroke-width: 2.5px;
}

.kol-chat__gate-error {
  margin-top: .75rem;
  font-size: .58rem;
  color: var(--md-code-hl-special-color, #e33b3b);
  background: color-mix(in srgb, var(--md-code-hl-special-color, #e33b3b) 6%, var(--md-default-bg-color));
  padding: .35rem .6rem;
  border: 1px solid color-mix(in srgb, var(--md-code-hl-special-color, #e33b3b) 12%, transparent);
  border-radius: 8px;
  animation: kol-msg-in .2s ease;
}

.kol-chat__title {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--md-default-fg-color);
}

.kol-chat__title svg {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  fill: var(--md-primary-fg-color);
}

.kol-chat__status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10b981;
  margin-left: 2px;
  display: inline-block;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: kol-status-pulse 2s infinite;
}

@keyframes kol-status-pulse {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

.kol-chat__actions {
  display: flex;
  align-items: center;
  gap: .1rem;
}

/* Icon button base */
.kol-chat__expand,
.kol-chat__clear,
.kol-chat__close,
.kol-chat__logout {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--md-default-fg-color--light);
  font-size: 0;
  cursor: pointer;
  transition: background .15s ease, color .15s ease;
}

/* Tooltips */
.kol-chat__actions button {
  position: relative;
}
.kol-chat__actions button::after {
  content: attr(data-title);
  position: absolute;
  top: 120%;
  right: 0;
  background: var(--md-default-fg-color);
  color: var(--md-default-bg-color);
  padding: .2rem .4rem;
  font-size: .5rem;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity .15s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, .15);
  z-index: 10;
}
.kol-chat__actions button:hover::after,
.kol-chat__actions button:focus-visible::after {
  opacity: .95;
}



.kol-chat__expand svg,
.kol-chat__clear svg,
.kol-chat__close svg,
.kol-chat__logout svg {
  width: 1rem;
  height: 1rem;
}

.kol-chat__expand svg,
.kol-chat__clear svg,
.kol-chat__close svg {
  fill: currentColor;
}

.kol-chat__logout svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 2px;
}

.kol-chat__logout[hidden] {
  display: none !important;
}

.kol-chat__shrink-icon {
  display: none !important;
}

.kol-chat__panel--expanded .kol-chat__expand-icon {
  display: none !important;
}

.kol-chat__panel--expanded .kol-chat__shrink-icon {
  display: block !important;
}


.kol-chat__expand:hover,
.kol-chat__clear:hover,
.kol-chat__close:hover,
.kol-chat__logout:hover {
  background: color-mix(in srgb, var(--md-default-fg-color) 8%, transparent);
  color: var(--md-default-fg-color);
}

.kol-chat__clear:disabled {
  opacity: .3;
  cursor: not-allowed;
  pointer-events: none;
}

.kol-chat__expand:focus-visible,
.kol-chat__clear:focus-visible,
.kol-chat__close:focus-visible,
.kol-chat__logout:focus-visible {
  outline: 2px solid var(--md-accent-fg-color);
  outline-offset: 1px;
}

/* ── Messages ───────────────────────────────────────────────────────────── */

/* Shared thin scrollbars */
.kol-chat__messages,
.kol-chat__thinking-text,
.kol-chat__input,
.kol-chat__message table,
.kol-chat__message pre {
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--md-default-fg-color) 18%, transparent) transparent;
}
.kol-chat__messages::-webkit-scrollbar,
.kol-chat__thinking-text::-webkit-scrollbar,
.kol-chat__input::-webkit-scrollbar,
.kol-chat__message table::-webkit-scrollbar,
.kol-chat__message pre::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}
.kol-chat__messages::-webkit-scrollbar-track,
.kol-chat__thinking-text::-webkit-scrollbar-track,
.kol-chat__input::-webkit-scrollbar-track,
.kol-chat__message table::-webkit-scrollbar-track,
.kol-chat__message pre::-webkit-scrollbar-track {
  background: transparent;
}
.kol-chat__messages::-webkit-scrollbar-thumb,
.kol-chat__thinking-text::-webkit-scrollbar-thumb,
.kol-chat__input::-webkit-scrollbar-thumb,
.kol-chat__message table::-webkit-scrollbar-thumb,
.kol-chat__message pre::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--md-default-fg-color) 18%, transparent);
  border-radius: 4px;
}

.kol-chat__messages {
  display: flex;
  min-height: 0;
  flex: 1;
  flex-direction: column;
  gap: .7rem;
  overflow-y: auto;
  padding: 1rem;
}

/* Empty state */
.kol-chat__messages:empty::before {
  content: "向 Insights AI 提问本报告的内容";
  margin: auto;
  text-align: center;
  max-width: 12rem;
  color: var(--md-default-fg-color--light);
  font-size: .6rem;
  line-height: 1.7;
  opacity: .7;
}

/* ── Bubbles ───────────────────────────────────────────────────────────── */

.kol-chat__message {
  max-width: 90%;
  white-space: normal;
  overflow-wrap: anywhere;
  padding: .5rem .7rem;
  font-size: .6rem;
  line-height: 1.6;
  animation: kol-msg-in .22s ease both;
  user-select: text;
}

.kol-chat__message--user {
  align-self: flex-end;
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  border-radius: 14px 14px 4px 14px;
}

.kol-chat__message--assistant {
  align-self: flex-start;
  display: flex;
  flex-direction: column;
  gap: .4rem; /* Flex gap handles spacing symmetrically between active elements only */
  background: color-mix(in srgb, var(--md-default-fg-color) 6%, var(--md-default-bg-color));
  color: var(--md-default-fg-color);
  border: 1px solid color-mix(in srgb, var(--md-default-fg-color) 10%, transparent);
  border-radius: 4px 14px 14px 14px;
}

.kol-chat__message--error {
  border-color: var(--md-code-hl-special-color);
  background: color-mix(in srgb, var(--md-code-hl-special-color) 6%, var(--md-default-bg-color));
}

.kol-chat__answer {
  white-space: normal;
  overflow: hidden;
  word-break: break-word;
}

/* ── Typing indicator (3-dot wave) ─────────────────────────────────────── */

.kol-chat__answer--loading {
  color: var(--md-default-fg-color--light);
  animation: kol-dots 1.3s ease-in-out infinite;
  letter-spacing: 2px;
}

/* ── Markdown in bubbles ────────────────────────────────────────────────── */

.kol-chat__message p,
.kol-chat__message ul,
.kol-chat__message ol,
.kol-chat__message pre,
.kol-chat__message blockquote,
.kol-chat__message h3,
.kol-chat__message h4,
.kol-chat__message h5,
.kol-chat__message h6 {
  margin: 0 0 .45rem;
}

.kol-chat__message p:last-child,
.kol-chat__message ul:last-child,
.kol-chat__message ol:last-child,
.kol-chat__message pre:last-child,
.kol-chat__message blockquote:last-child {
  margin-bottom: 0;
}

.kol-chat__message ul,
.kol-chat__message ol {
  padding-left: 1.2rem;
  margin: .3rem 0;
}

.kol-chat__message li {
  margin: .15rem 0;
}

.kol-chat__message blockquote {
  margin: .3rem 0;
  padding: .35rem .55rem;
  border-left: 3px solid var(--md-default-fg-color--lighter);
  background: color-mix(in srgb, var(--md-default-fg-color) 3%, var(--md-default-bg-color));
  color: var(--md-default-fg-color--light);
}

.kol-chat__message blockquote p {
  margin: 0;
}

.kol-chat__message hr {
  border: 0;
  border-top: 1px solid color-mix(in srgb, var(--md-default-fg-color) 12%, transparent);
  margin: .5rem 0;
}

.kol-chat__message a {
  color: var(--md-accent-fg-color);
  text-decoration: underline;
  text-underline-offset: .12rem;
}

.kol-chat__message sup {
  font-size: .45rem;
  line-height: 0;
  vertical-align: super;
  margin: 0 1px;
}

.kol-chat__message sup a {
  text-decoration: none;
  font-weight: 700;
}

.kol-chat__message .arithmatex--block {
  display: block;
  margin: .6rem 0;
  text-align: center;
}

.kol-chat__message table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  margin: .6rem 0;
  font-size: .55rem;
}

.kol-chat__message th,
.kol-chat__message td {
  border: 1px solid color-mix(in srgb, var(--md-default-fg-color) 12%, transparent);
  padding: .35rem .5rem;
  text-align: left;
}

.kol-chat__message th {
  background: color-mix(in srgb, var(--md-default-fg-color) 4%, var(--md-default-bg-color));
  font-weight: 700;
}

.kol-chat__message tr:nth-child(even) {
  background: color-mix(in srgb, var(--md-default-fg-color) 2%, var(--md-default-bg-color));
}


.kol-chat__message code {
  border-radius: 4px;
  padding: .05rem .2rem;
  background: color-mix(in srgb, var(--md-default-fg-color) 10%, var(--md-default-bg-color));
  font-size: .55rem;
}

.kol-chat__message--user code {
  background: color-mix(in srgb, var(--md-primary-bg-color) 22%, transparent);
}

.kol-chat__message pre {
  max-width: 100%;
  overflow-x: auto;
  border-radius: 8px;
  padding: .5rem .65rem;
  background: color-mix(in srgb, var(--md-default-fg-color) 6%, var(--md-default-bg-color));
  margin: .4rem 0;
}

.kol-chat__message pre code {
  padding: 0;
  background: transparent;
}

.kol-chat__message h3,
.kol-chat__message h4,
.kol-chat__message h5,
.kol-chat__message h6 {
  font-weight: 700;
  font-size: .65rem;
  margin: .5rem 0 .3rem;
}

/* ── Status ─────────────────────────────────────────────────────────────── */

.kol-chat__status {
  display: block;
  width: max-content;
  max-width: 100%;
  color: var(--md-default-fg-color--light);
  font-size: .55rem;
  animation: kol-status-blink 1.8s ease-in-out infinite;
}

.kol-chat__status[hidden] { display: none; }

/* ── Thinking block ─────────────────────────────────────────────────────── */

.kol-chat__thinking {
  border: 1px solid color-mix(in srgb, var(--md-default-fg-color) 8%, transparent);
  border-left: 3px solid color-mix(in srgb, var(--md-accent-fg-color) 50%, transparent);
  border-radius: 8px; /* Symmetrical rounded corners for modern card look */
  background: color-mix(in srgb, var(--md-default-fg-color) 1.5%, var(--md-default-bg-color));
  overflow: hidden;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.kol-chat__thinking[hidden] { display: none; }

/* Glowing active state while thinking */
.kol-chat__thinking--active {
  border-color: color-mix(in srgb, var(--md-accent-fg-color) 25%, transparent);
  border-left-color: var(--md-accent-fg-color);
  box-shadow: 0 0 10px color-mix(in srgb, var(--md-accent-fg-color) 8%, transparent);
}

.kol-chat__thinking summary {
  display: flex;
  align-items: center;
  gap: .45rem;
  padding: .45rem .65rem;
  cursor: pointer;
  font-size: .55rem;
  font-weight: 700;
  color: var(--md-default-fg-color--light);
  list-style: none;
  user-select: none;
  transition: background .14s ease, color .14s ease;
}

.kol-chat__thinking summary::-webkit-details-marker { display: none; }

/* Custom split-brain icon sizing and rules */
.kol-chat__thinking-icon {
  width: .75rem;
  height: .75rem;
  flex-shrink: 0;
  stroke: currentColor;
  stroke-width: 2.2px;
  fill: none;
  transition: color .2s ease;
}

/* Pulsing micro-interaction while active */
.kol-chat__thinking--active .kol-chat__thinking-icon {
  animation: kol-brain-pulse 2s ease-in-out infinite;
}

@keyframes kol-brain-pulse {
  0%, 100% { opacity: .6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); color: var(--md-accent-fg-color); }
}

.kol-chat__thinking summary::after {
  content: "";
  margin-left: auto;
  width: .65rem;
  height: .65rem;
  flex-shrink: 0;
  background-color: currentColor;
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
  transition: transform .2s ease;
}

.kol-chat__thinking[open] > summary::after {
  transform: rotate(180deg);
}

.kol-chat__thinking summary:hover {
  background: color-mix(in srgb, var(--md-default-fg-color) 4%, transparent);
  color: var(--md-default-fg-color);
}

.kol-chat__thinking-text {
  max-height: 8rem;
  overflow-y: auto;
  white-space: pre-wrap;
  padding: .2rem .65rem .55rem;
  font-size: .55rem;
  line-height: 1.55;
  color: var(--md-default-fg-color--light);
  
  /* Indented vertical dashed thought tree line */
  border-left: 1.5px dashed color-mix(in srgb, var(--md-default-fg-color) 12%, transparent);
  margin-left: .95rem;
  padding-left: .65rem;
}

/* ── Search toggle (custom pill switch) ─────────────────────────────────── */

/* Pill Toggles container on the left */
.kol-chat__form-toggles {
  display: flex;
  align-items: center;
  gap: .4rem;
}

/* Base toggle pill design */
.kol-chat__toggle-pill {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .25rem .55rem;
  border: 1px solid color-mix(in srgb, var(--md-default-fg-color) 15%, transparent);
  border-radius: 100px;
  color: var(--md-default-fg-color--light);
  font-size: .52rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  background: transparent;
  transition: all .16s ease;
}

.kol-chat__toggle-pill[hidden] {
  display: none !important;
}

.kol-chat__toggle-pill input[type="checkbox"] {
  display: none !important; /* Hide native checkbox entirely */
}

.kol-chat__toggle-pill svg {
  width: .75rem;
  height: .75rem;
  flex-shrink: 0;
  stroke: currentColor;
  fill: none;
  stroke-width: 2px;
  transition: transform .16s ease, fill .16s ease;
}

/* Active State styling (when checkbox is checked) */
.kol-chat__toggle-pill:has(input:checked) {
  border-color: var(--md-accent-fg-color);
  color: var(--md-accent-fg-color);
  background: color-mix(in srgb, var(--md-accent-fg-color) 8%, transparent);
}

.kol-chat__toggle-pill:has(input:checked) svg {
  transform: scale(1.05);
}

/* Hover effects */
.kol-chat__toggle-pill:hover:not(:has(input:checked)) {
  background: color-mix(in srgb, var(--md-default-fg-color) 6%, transparent);
  border-color: color-mix(in srgb, var(--md-default-fg-color) 30%, transparent);
  color: var(--md-default-fg-color);
}

/* ── Form / Input area ──────────────────────────────────────────────────── */

.kol-chat__form {
  position: relative; /* Establish stacking context for outer glow */
  z-index: 2; /* Render on top of scrolling message container */
  display: flex;
  flex-direction: column;
  margin: 0 .75rem .75rem;
  border: 1.5px solid color-mix(in srgb, var(--md-default-fg-color) 12%, transparent);
  border-radius: 20px; /* More rounded container, DeepSeek style */
  background: color-mix(in srgb, var(--md-default-fg-color) 3%, var(--md-default-bg-color));
  flex-shrink: 0;
  transition: border-color .18s ease, box-shadow .18s ease;
  padding: .2rem .55rem .55rem; /* Symmetrical left, right, and bottom paddings */
}

.kol-chat__form:focus-within {
  border-color: var(--md-accent-fg-color);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--md-accent-fg-color) 18%, transparent);
}

.kol-chat__input {
  min-height: 2.4rem;
  max-height: 7rem;
  resize: none;
  border: 0;
  border-radius: 0;
  padding: .5rem 0 .2rem; /* Zero left/right padding so text aligns perfectly with toolbar elements */
  background: transparent;
  color: var(--md-default-fg-color);
  font: inherit;
  font-size: .6rem;
  line-height: 1.5;
}

.kol-chat__input::placeholder {
  color: var(--md-default-fg-color--light);
  opacity: .6;
}

.kol-chat__input:focus {
  outline: none;
}

/* Toolbar container */
.kol-chat__form-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0; /* Inherit outer form padding directly */
  min-height: auto; /* Remove min-height to allow exact bottom-padding alignment */
  margin-top: .4rem; /* Direct vertical gap between input area and toolbar */
}

.kol-chat__form-actions {
  display: flex;
  align-items: center;
  gap: .4rem;
  margin-left: auto; /* Always keep aligned to the right */
}

/* Hide Send button when Stop button is active */
.kol-chat__form:has(.kol-chat__stop:not([hidden])) .kol-chat__send {
  display: none !important;
}

/* Send button */
.kol-chat__send {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.6rem;
  height: 1.6rem;
  flex-shrink: 0;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--md-accent-fg-color);
  color: var(--md-primary-bg-color);
  font-size: 0;
  cursor: pointer;
  box-shadow: 0 2px 6px color-mix(in srgb, var(--md-accent-fg-color) 30%, transparent);
  transition: transform .16s ease, box-shadow .16s ease, background-color .16s ease;
}

.kol-chat__send svg {
  width: .85rem;
  height: .85rem;
  stroke: currentColor;
  fill: none;
  stroke-width: 2.5px;
}

.kol-chat__send:hover:not(:disabled) {
  transform: scale(1.06) translateY(-1px);
  box-shadow: 0 3px 10px color-mix(in srgb, var(--md-accent-fg-color) 40%, transparent);
}

.kol-chat__send:active:not(:disabled) {
  transform: scale(.93);
  box-shadow: 0 1px 3px color-mix(in srgb, var(--md-accent-fg-color) 20%, transparent);
}

.kol-chat__send:disabled {
  cursor: not-allowed;
  opacity: 0.3;
  background: color-mix(in srgb, var(--md-default-fg-color) 8%, transparent);
  color: color-mix(in srgb, var(--md-default-fg-color) 30%, transparent);
  box-shadow: none;
}

.kol-chat__send:focus-visible {
  outline: 2px solid var(--md-accent-fg-color);
  outline-offset: 2px;
}

/* Stop button */
.kol-chat__stop {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.6rem;
  height: 1.6rem;
  flex-shrink: 0;
  padding: 0;
  border: 1.5px solid color-mix(in srgb, var(--md-code-hl-special-color, #e33b3b) 20%, transparent);
  border-radius: 50%;
  background: color-mix(in srgb, var(--md-code-hl-special-color, #e33b3b) 8%, var(--md-default-bg-color));
  color: var(--md-code-hl-special-color, #e33b3b);
  font-size: 0;
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}

.kol-chat__stop svg {
  width: .7rem;
  height: .7rem;
  fill: currentColor;
}

.kol-chat__stop[hidden] { display: none !important; }

.kol-chat__stop:hover {
  background: color-mix(in srgb, var(--md-code-hl-special-color, #e33b3b) 14%, var(--md-default-bg-color));
  border-color: color-mix(in srgb, var(--md-code-hl-special-color, #e33b3b) 40%, transparent);
  transform: scale(1.04);
  box-shadow: 0 2px 6px color-mix(in srgb, var(--md-code-hl-special-color, #e33b3b) 20%, transparent);
}

.kol-chat__stop:active {
  transform: scale(.94);
}

.kol-chat__stop:focus-visible {
  outline: 2px solid var(--md-accent-fg-color);
  outline-offset: 2px;
}

/* ── Reduced motion ─────────────────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .kol-chat__toggle,
  .kol-chat__toggle::after,
  .kol-chat__panel,
  .kol-chat__message,
  .kol-chat__send,
  .kol-chat__stop,
  .kol-chat__input,
  .kol-chat__clear,
  .kol-chat__close,
  .kol-chat__expand,
  .kol-chat__search-input,
  .kol-chat__search-input::before,
  .kol-chat__thinking summary::after,
  .kol-chat__status,
  .kol-chat__message--assistant .kol-chat__answer:empty::before {
    animation: none !important;
    transition: none !important;
  }
}

/* ── Mobile ─────────────────────────────────────────────────────────────── */

@media (max-width: 44rem) {
  .kol-chat {
    right: .75rem;
    bottom: .75rem;
  }

  .kol-chat__panel {
    width: calc(100vw - 1.5rem);
    height: min(34rem, calc(100vh - 5.5rem));
  }

  .kol-chat__panel--expanded {
    top: .5rem !important;
    right: .5rem !important;
    bottom: .5rem !important;
    left: .5rem !important;
    border-radius: 12px !important;
  }

  .kol-chat__form {
    margin: 0 .5rem .5rem;
  }
}

/* ── Code Syntax Highlighting (Highlight.js mapping to MkDocs palette) ───── */
.hljs-keyword,
.hljs-selector-tag,
.hljs-subst {
  color: var(--md-code-hl-keyword-color, #d73a49);
  font-weight: bold;
}
.hljs-string,
.hljs-doctag,
.hljs-regexp,
.hljs-type,
.hljs-built_in {
  color: var(--md-code-hl-string-color, #032f62);
}
.hljs-number,
.hljs-literal,
.hljs-symbol,
.hljs-bullet {
  color: var(--md-code-hl-number-color, #005cc5);
}
.hljs-code,
.hljs-title,
.hljs-section,
.hljs-selector-id {
  color: var(--md-code-hl-name-color, #6f42c1);
}
.hljs-comment,
.hljs-quote {
  color: var(--md-code-hl-comment-color, #6a737d);
  font-style: italic;
}
.hljs-meta,
.hljs-operator {
  color: var(--md-code-hl-operator-color, #d73a49);
}
.hljs-variable,
.hljs-template-variable,
.hljs-attribute {
  color: var(--md-code-hl-variable-color, #e36209);
}