:root {
  color-scheme: light;
  --bg: #fbfbfd;
  --app-bg: #f0eff3;
  --sidebar: rgba(255, 255, 255, 0.78);
  --surface: #ffffff;
  --surface-muted: #f4f4f7;
  --surface-hover: #ececf1;
  --text: #151519;
  --muted: #8d8c96;
  --faint: #bcbbc4;
  --border: rgba(24, 24, 30, 0.08);
  --border-strong: rgba(24, 24, 30, 0.14);
  --accent: #5f96c9;
  --accent-strong: #447daa;
  --accent-soft: #eaf4ff;
  --accent-text: #ffffff;
  --success: #6fa87e;
  --warning: #c59242;
  --danger: #d65b5b;
  --user: #ffffff;
  --radius: 24px;
  --shadow: 0 28px 80px rgba(40, 39, 48, 0.18);
  --shadow-soft: 0 18px 48px rgba(40, 39, 48, 0.1);
  --shadow-card: 0 24px 70px rgba(43, 42, 52, 0.12);
  --content-width: 890px;
  --app-height: 100dvh;
  --shimmer-bright: var(--text);
  --shimmer-mid: color-mix(in srgb, var(--text) 64%, var(--muted) 36%);
  --shimmer-dim: color-mix(in srgb, var(--muted) 70%, var(--surface) 30%);
  --shimmer-duration: 4.8s;
  --shimmer-text-gradient: linear-gradient(
    100deg,
    var(--shimmer-bright) 0%,
    var(--shimmer-mid) 34%,
    var(--shimmer-dim) 50%,
    var(--shimmer-mid) 66%,
    var(--shimmer-bright) 100%
  );
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101014;
  --app-bg: #08080b;
  --sidebar: rgba(18, 18, 24, 0.86);
  --surface: #1b1b22;
  --surface-muted: #14141a;
  --surface-hover: #24242d;
  --text: #f4f2f0;
  --muted: #a29faa;
  --faint: #74717d;
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.17);
  --accent: #7fb4dc;
  --accent-strong: #addaf8;
  --accent-soft: #172d3f;
  --accent-text: #0e1116;
  --success: #88bd96;
  --warning: #d3a152;
  --danger: #e16f70;
  --user: #1d1d24;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.48);
  --shadow-soft: 0 18px 48px rgba(0, 0, 0, 0.3);
  --shadow-card: 0 24px 70px rgba(0, 0, 0, 0.34);
  --shimmer-bright: #f6f4f2;
  --shimmer-mid: color-mix(in srgb, var(--text) 58%, var(--muted) 42%);
  --shimmer-dim: color-mix(in srgb, var(--surface-muted) 70%, var(--muted) 30%);
}

:root[data-theme="dark"] .session-pane {
  border-right-color: rgba(255, 255, 255, 0.07);
  box-shadow: inset -1px 0 0 rgba(255, 255, 255, 0.04);
}

:root[data-theme="dark"] .brand-mark {
  background: radial-gradient(circle at 32% 26%, #ffffff 0 9%, transparent 10%), linear-gradient(135deg, #f5f4f2, #9a99a7);
  color: #111116;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
}

:root[data-theme="dark"] .primary-button,
:root[data-theme="dark"] .send-button,
:root[data-theme="dark"] .settings-button.active,
:root[data-theme="dark"] .icon-button.active,
:root[data-theme="dark"] .message-action:hover {
  background: #f4f2f0;
  color: #111116;
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.26);
}

:root[data-theme="dark"] .primary-button:hover,
:root[data-theme="dark"] .send-button:hover {
  background: #ffffff;
}

:root[data-theme="dark"] .send-button.stop-mode {
  background: var(--danger);
  color: #ffffff;
}

:root[data-theme="dark"] .send-button.queue-mode {
  background: color-mix(in srgb, var(--accent) 72%, var(--success) 28%);
  color: #0e1116;
}

:root[data-theme="dark"] .secondary-button,
:root[data-theme="dark"] .icon-button,
:root[data-theme="dark"] .composer-tool,
:root[data-theme="dark"] .settings-button {
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
}

:root[data-theme="dark"] .icon-button:hover,
:root[data-theme="dark"] .composer-tool:hover,
:root[data-theme="dark"] .secondary-button:hover,
:root[data-theme="dark"] .settings-button:hover,
:root[data-theme="dark"] .toggle:hover,
:root[data-theme="dark"] .segmented button:hover,
:root[data-theme="dark"] .text-button:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
  border-color: var(--border);
  box-shadow: none;
}

:root[data-theme="dark"] .session-search,
:root[data-theme="dark"] .session-settings,
:root[data-theme="dark"] .quick-prompt,
:root[data-theme="dark"] .attachment-chip,
:root[data-theme="dark"] .composer-shell,
:root[data-theme="dark"] .sheet-panel {
  background: rgba(27, 27, 34, 0.9);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-soft);
}

:root[data-theme="dark"] .session-search {
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

:root[data-theme="dark"] .session-search:focus-within,
:root[data-theme="dark"] .composer-shell:focus-within {
  box-shadow:
    var(--shadow-soft),
    0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent);
}

:root[data-theme="dark"] .session-item:hover {
  background: rgba(255, 255, 255, 0.055);
}

:root[data-theme="dark"] .session-item.active {
  background: rgba(255, 255, 255, 0.085);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.2);
}

:root[data-theme="dark"] .session-attachment,
:root[data-theme="dark"] .session-attachment.image span,
:root[data-theme="dark"] .attachment-thumb,
:root[data-theme="dark"] .attachment-file-badge {
  background: rgba(127, 180, 220, 0.14);
  border-color: color-mix(in srgb, var(--accent) 42%, transparent);
}

:root[data-theme="dark"] .segmented {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.08);
}

:root[data-theme="dark"] .toggle,
:root[data-theme="dark"] .segmented button {
  background: rgba(255, 255, 255, 0.04);
}

:root[data-theme="dark"] .toggle.active,
:root[data-theme="dark"] .segmented button.active {
  background: rgba(255, 255, 255, 0.13);
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 44%, transparent);
  box-shadow: none;
}

:root[data-theme="dark"] .chat-pane {
  background:
    linear-gradient(180deg, #15151a 0%, #101014 46%, #0b0b0f 100%);
}

:root[data-theme="dark"] .message.user .bubble {
  background: var(--user);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.26);
}

:root[data-theme="dark"] .inline-code,
:root[data-theme="dark"] .message.user .inline-code {
  background: rgba(255, 255, 255, 0.08);
}

:root[data-theme="dark"] .message-action {
  background: rgba(255, 255, 255, 0.045);
}

:root[data-theme="dark"] .message-context summary,
:root[data-theme="dark"] .context-static span,
:root[data-theme="dark"] .context-chips b,
:root[data-theme="dark"] .quick-prompt {
  background: color-mix(in srgb, var(--accent-soft) 72%, var(--surface) 28%);
  border-color: color-mix(in srgb, var(--accent) 32%, transparent);
}

:root[data-theme="dark"] .composer {
  background: linear-gradient(180deg, rgba(11, 11, 15, 0), rgba(11, 11, 15, 0.82) 34%, rgba(11, 11, 15, 0.98));
}

:root[data-theme="dark"] .composer.drag-over .composer-shell {
  border-color: color-mix(in srgb, var(--accent) 48%, rgba(255, 255, 255, 0.12));
}

:root[data-theme="dark"] .scrim {
  background: rgba(0, 0, 0, 0.46);
}

:root[data-theme="dark"] .toast {
  background: #f4f2f0;
  color: #111116;
  border-color: rgba(255, 255, 255, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  max-width: 100%;
  height: 100%;
  overflow: hidden;
  overflow-x: hidden;
}

body {
  margin: 0;
  background: var(--app-bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
  overscroll-behavior: none;
}

button,
input,
textarea {
  font: inherit;
  letter-spacing: 0;
}

button {
  border: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.4;
  transform: none;
}

svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.app-shell {
  display: grid;
  grid-template-columns: 318px minmax(0, 1fr);
  width: 100%;
  max-width: 100%;
  height: var(--app-height);
  max-height: var(--app-height);
  min-height: 0;
  overflow: hidden;
  overflow-x: hidden;
  background: var(--bg);
}

.edge-swipe-zone {
  display: none;
}

.session-pane {
  display: flex;
  flex-direction: column;
  gap: 13px;
  min-width: 0;
  min-height: 0;
  padding: 16px;
  background: var(--sidebar);
  border-right: 1px solid rgba(24, 24, 30, 0.06);
  box-shadow: inset -1px 0 0 rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(22px);
}

.pane-head,
.brand-lockup,
.session-actions,
.top-bar,
.top-actions,
.sheet-actions,
.title-row,
.drawer-actions,
.sidebar-footer,
.composer-shell,
.code-head,
.sheet-head,
.text-button,
.session-search {
  display: flex;
  align-items: center;
}

.pane-head,
.top-bar,
.sheet-head {
  justify-content: space-between;
  gap: 12px;
}

.brand-lockup {
  min-width: 0;
  gap: 11px;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 12px;
  background: radial-gradient(circle at 32% 26%, #ffffff 0 9%, transparent 10%), linear-gradient(135deg, #111115, #4e4d57);
  color: #ffffff;
  font-size: 14px;
  font-weight: 850;
  box-shadow: 0 9px 22px rgba(21, 21, 25, 0.18);
}

h1 {
  margin: 0;
  font-size: 18px;
  line-height: 1.08;
}

.brand-lockup span,
.chat-title span:last-child {
  display: block;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand-lockup span {
  margin-top: 3px;
}

.primary-button,
.secondary-button,
.settings-button,
.toggle,
.segmented button,
.icon-button,
.composer-tool,
.send-button,
.text-button {
  min-width: 0;
  border-radius: 999px;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    opacity 160ms ease,
    transform 160ms ease,
    box-shadow 160ms ease;
}

.primary-button,
.secondary-button,
.settings-button {
  min-height: 40px;
  padding: 0 14px;
  font-size: 14px;
  font-weight: 760;
}

.session-actions {
  gap: 8px;
}

.primary-button {
  display: inline-flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #151519;
  color: #ffffff;
  box-shadow: 0 12px 28px rgba(21, 21, 25, 0.14);
}

.primary-button:hover {
  background: #2b2b31;
}

.secondary-button {
  background: rgba(255, 255, 255, 0.74);
  color: var(--text);
  border: 1px solid var(--border);
}

.secondary-button.danger,
.text-button.danger {
  color: var(--danger);
}

.icon-button,
.composer-tool,
.send-button {
  display: inline-grid;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  place-items: center;
}

.icon-button,
.composer-tool {
  background: rgba(255, 255, 255, 0.56);
  color: var(--muted);
  border: 1px solid transparent;
}

.icon-button:hover,
.composer-tool:hover,
.secondary-button:hover,
.settings-button:hover,
.toggle:hover,
.segmented button:hover {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
  box-shadow: 0 8px 22px rgba(40, 39, 48, 0.07);
}

.icon-button.active {
  background: #151519;
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 10px 24px rgba(21, 21, 25, 0.16);
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 55%, transparent);
  outline-offset: 3px;
}

.primary-button:active,
.send-button:active,
.composer-tool:active,
.icon-button:active,
.text-button:active {
  transform: scale(0.97);
}

.session-search {
  gap: 8px;
  min-height: 42px;
  padding: 0 13px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--border);
  color: var(--muted);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.session-search:focus-within {
  border-color: color-mix(in srgb, var(--accent) 42%, var(--border));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 0 0 4px color-mix(in srgb, var(--accent) 12%, transparent);
}

.session-search input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font-size: 14px;
}

.session-list {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 6px;
  min-height: 0;
  overflow: auto;
  padding: 2px 0;
  scrollbar-width: thin;
}

.session-date {
  margin: 13px 9px 4px;
  color: var(--faint);
  font-size: 11px;
  font-weight: 820;
  line-height: 1.2;
  text-transform: uppercase;
}

.session-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 68px;
  padding: 12px;
  border-radius: 20px;
  background: transparent;
  color: var(--text);
  text-align: left;
  border: 1px solid transparent;
}

.session-item:hover {
  background: rgba(255, 255, 255, 0.56);
}

.session-item.active {
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(255, 255, 255, 0.92);
  box-shadow: 0 16px 38px rgba(40, 39, 48, 0.09);
}

.session-copy {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.session-item strong,
.session-item span,
.session-item small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-item strong {
  font-size: 14px;
  line-height: 1.25;
}

.session-item span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.25;
}

.session-item small {
  color: var(--faint);
  font-size: 11px;
  line-height: 1.3;
}

.session-attachment {
  position: relative;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  overflow: hidden;
  border-radius: 15px;
  background: var(--accent-soft);
  border: 1px dashed color-mix(in srgb, var(--accent) 58%, transparent);
  color: var(--accent-strong);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0;
}

.session-attachment img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.session-attachment span {
  margin-top: 0;
  color: inherit;
  font-size: inherit;
  line-height: 1;
}

.session-attachment.image span {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
}

.session-attachment.image.loaded span {
  display: none;
}

.session-attachment.file span {
  max-width: 100%;
  padding: 0 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-settings {
  display: grid;
  gap: 14px;
  padding: 14px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow-soft);
}

.session-settings[hidden] {
  display: none;
}

.settings-block {
  display: grid;
  gap: 9px;
}

.panel-title {
  color: var(--muted);
  font-size: 11px;
  font-weight: 820;
  letter-spacing: 0;
  text-transform: uppercase;
}

.drawer-actions {
  flex-wrap: wrap;
  gap: 7px;
}

.drawer-actions .secondary-button {
  flex: 1 1 96px;
}

.toggle-grid,
.segmented {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}

.segmented {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding: 4px;
  border-radius: 999px;
  background: var(--surface-muted);
  border: 1px solid var(--border);
}

.segmented-compact {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.toggle,
.segmented button {
  min-height: 34px;
  padding: 0 10px;
  background: rgba(255, 255, 255, 0.44);
  color: var(--muted);
  border: 1px dashed transparent;
  font-size: 12px;
  font-weight: 760;
  white-space: nowrap;
}

.segmented-compact button {
  min-width: 0;
  padding: 0 5px;
  font-size: 11px;
}

.toggle.active,
.segmented button.active {
  background: #ffffff;
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 34%, transparent);
  box-shadow: 0 8px 20px rgba(40, 39, 48, 0.07);
}

.sidebar-footer {
  gap: 8px;
  padding-top: 2px;
}

.settings-button {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: center;
  gap: 9px;
  background: rgba(255, 255, 255, 0.42);
  color: var(--muted);
  border: 1px solid transparent;
}

.settings-button.active {
  background: #151519;
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 12px 28px rgba(21, 21, 25, 0.14);
}

.chat-pane {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  grid-template-areas:
    "top"
    "messages"
    "composer";
  min-width: 0;
  width: 100%;
  max-width: 100%;
  height: 100%;
  min-height: 0;
  overflow: hidden;
  background:
    linear-gradient(180deg, #ffffff 0%, #fbfbfd 42%, #f6f5f8 100%);
}

.top-bar {
  grid-area: top;
  min-width: 0;
  min-height: 68px;
  padding: 14px 22px 8px;
  background: transparent;
  border-bottom: 0;
}

.chat-title {
  flex: 1 1 auto;
  min-width: 0;
  margin-right: auto;
}

.top-actions {
  flex: 0 0 auto;
  gap: 5px;
  margin-left: auto;
}

.title-row {
  gap: 8px;
  min-width: 0;
}

.title-row strong {
  min-width: 0;
  overflow: hidden;
  font-size: 18px;
  line-height: 1.16;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-title span:last-child {
  margin-top: 3px;
}

.status-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 999px;
  background: var(--success);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--success) 16%, transparent);
}

.status-dot.busy {
  background: var(--warning);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--warning) 16%, transparent);
}

.text-button {
  gap: 6px;
  min-height: 30px;
  padding: 0 10px;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  font-weight: 760;
}

.text-button:hover {
  background: var(--surface);
  color: var(--text);
}

.messages {
  position: relative;
  grid-area: messages;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  padding: 28px 22px 30px;
  overscroll-behavior: contain;
  scroll-behavior: smooth;
}

.message,
.messages > .empty-state {
  position: relative;
  z-index: 1;
}

.message {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  width: min(var(--content-width), 100%);
  max-width: 100%;
  min-width: 0;
  margin: 0 auto 22px;
}

.message.user {
  display: flex;
  justify-content: flex-end;
  min-width: 0;
}

.message.system {
  display: block;
}

.bubble {
  max-width: min(760px, 100%);
  min-width: 0;
  overflow-wrap: anywhere;
}

.message.user .bubble {
  max-width: min(650px, 82%, calc(100vw - 24px));
  padding: 17px 19px 14px;
  border-radius: 28px;
  border-bottom-right-radius: 9px;
  background: var(--user);
  border: 1px solid rgba(255, 255, 255, 0.94);
  box-shadow: 0 18px 48px rgba(40, 39, 48, 0.11);
}

.message.system .bubble {
  max-width: min(760px, 100%);
  color: var(--muted);
}

.bubble-text {
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  font-size: 16px;
  line-height: 1.58;
}

.rich-text {
  min-width: 0;
}

.inline-code {
  padding: 2px 6px;
  border-radius: 7px;
  background: var(--surface-muted);
  color: color-mix(in srgb, var(--text) 88%, var(--accent) 12%);
  font-size: 0.92em;
}

.message.user .inline-code {
  background: color-mix(in srgb, var(--accent) 10%, var(--surface) 90%);
}

.code-block {
  margin: 14px 0;
  overflow: hidden;
  border-radius: 18px;
  background: #121216;
  color: #eef0f4;
  border: 1px solid rgba(255, 255, 255, 0.12);
  white-space: normal;
  box-shadow: 0 18px 38px rgba(18, 18, 22, 0.18);
}

.code-head {
  justify-content: space-between;
  gap: 10px;
  min-height: 38px;
  padding: 7px 10px;
  background: rgba(255, 255, 255, 0.06);
  color: #c5c8d0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 12px;
  font-weight: 760;
}

.code-head span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.code-copy,
.message-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    opacity 160ms ease,
    transform 160ms ease;
}

.code-copy {
  gap: 5px;
  min-height: 28px;
  padding: 0 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: #d5d8df;
  font-size: 12px;
  font-weight: 760;
}

.code-copy:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.code-copy svg,
.message-action svg {
  width: 15px;
  height: 15px;
}

.code-block pre {
  max-width: 100%;
  margin: 0;
  padding: 14px;
  overflow: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.52;
  white-space: pre;
}

.message-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 12px;
}

.message.user .message-actions {
  justify-content: flex-end;
}

.message-action {
  position: relative;
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 999px;
  background: rgba(244, 244, 247, 0.78);
  color: color-mix(in srgb, var(--muted) 88%, var(--text) 12%);
}

.message-action:hover {
  background: #151519;
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 10px 24px rgba(21, 21, 25, 0.14);
}

.message-action span {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.bubble-meta {
  margin-top: 9px;
  color: var(--faint);
  font-size: 11px;
  line-height: 1.2;
}

.live-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.live-heading strong {
  overflow: hidden;
  color: var(--text);
  font-size: 14px;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
  background: var(--shimmer-text-gradient);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  animation: text-shimmer var(--shimmer-duration) ease-in-out infinite;
  -webkit-text-fill-color: transparent;
}

.live-heading span:last-child {
  color: var(--muted);
  font-size: 11px;
  font-weight: 760;
}

.live-context[open] + .live-heading {
  display: none;
}

.live-preview {
  display: -webkit-box;
  margin-top: 10px;
  overflow: hidden;
  color: color-mix(in srgb, var(--text) 86%, var(--muted) 14%);
  font-size: 14px;
  line-height: 1.48;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.message-context {
  margin-top: 10px;
  color: color-mix(in srgb, var(--muted) 88%, var(--text) 12%);
  font-size: 12px;
  line-height: 1.35;
}

.message.assistant .bubble > .message-context:first-child {
  margin-top: 0;
  margin-bottom: 12px;
}

.message-context summary {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  list-style: none;
  cursor: pointer;
  background: color-mix(in srgb, var(--accent-soft) 72%, #ffffff 28%);
  border: 1px dashed color-mix(in srgb, var(--accent) 42%, transparent);
  color: var(--accent-strong);
  font-weight: 720;
  user-select: none;
}

.context-static span {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--muted);
  font-weight: 720;
}

.message-context summary::-webkit-details-marker {
  display: none;
}

.message-context summary::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 120ms ease;
}

.message-context[open] summary::before {
  transform: rotate(45deg);
}

.context-panel {
  display: grid;
  gap: 11px;
  margin-top: 10px;
  padding-top: 11px;
  border-top: 1px solid var(--border);
}

.context-sections {
  display: grid;
  gap: 8px;
}

.context-section {
  min-width: 0;
}

.context-section span {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 820;
  letter-spacing: 0;
  text-transform: uppercase;
}

.context-section p {
  margin: 0;
  color: color-mix(in srgb, var(--muted) 88%, var(--text) 12%);
  overflow-wrap: anywhere;
}

.context-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-width: 0;
}

.context-chips b {
  min-width: 0;
  max-width: 100%;
  padding: 5px 9px;
  overflow: hidden;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent-soft) 76%, #ffffff 24%);
  color: color-mix(in srgb, var(--text) 72%, var(--accent) 28%);
  font-size: 11px;
  font-weight: 720;
  text-overflow: ellipsis;
  white-space: nowrap;
  border: 1px dashed color-mix(in srgb, var(--accent) 30%, transparent);
}

.context-timeline {
  display: grid;
  gap: 9px;
}

.context-step {
  display: block;
  min-width: 0;
}

.context-step-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 8px;
  min-width: 0;
}

.context-step.active strong {
  background: var(--shimmer-text-gradient);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  animation: text-shimmer var(--shimmer-duration) ease-in-out infinite;
  -webkit-text-fill-color: transparent;
}

.context-step strong {
  display: block;
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--text);
  font-size: 12px;
  line-height: 1.25;
}

.context-step-detail {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.context-step-elapsed {
  color: var(--muted);
  font-size: 11px;
  font-weight: 760;
  line-height: 1.2;
  white-space: nowrap;
}

.empty-state {
  display: grid;
  width: min(var(--content-width), 100%);
  min-height: 100%;
  margin: 0 auto;
  place-content: center;
  gap: 20px;
  color: var(--muted);
}

.messages > .empty-state {
  padding-bottom: 7vh;
}

.session-list .empty-state {
  width: 100%;
  min-height: auto;
  padding: 18px 10px;
  place-content: start;
  gap: 0;
}

.empty-copy {
  max-width: 460px;
}

.empty-copy strong {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 30px;
  line-height: 1.12;
}

.session-list .empty-copy strong {
  font-size: 15px;
}

.empty-copy span {
  display: block;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.45;
}

.session-list .empty-copy span {
  font-size: 12px;
}

.quick-prompts {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  max-width: 620px;
}

.quick-prompt {
  min-height: 42px;
  padding: 9px 13px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  color: color-mix(in srgb, var(--text) 74%, var(--accent) 26%);
  border: 1px dashed color-mix(in srgb, var(--accent) 44%, transparent);
  text-align: left;
  font-size: 13px;
  font-weight: 720;
  line-height: 1.25;
  box-shadow: 0 10px 26px rgba(40, 39, 48, 0.07);
}

.quick-prompt:hover {
  background: #ffffff;
  color: var(--text);
  box-shadow: 0 14px 34px rgba(40, 39, 48, 0.1);
}

.composer {
  grid-area: composer;
  align-self: end;
  min-width: 0;
  max-width: 100%;
  overflow-x: hidden;
  padding: 18px 22px calc(18px + env(safe-area-inset-bottom));
  background: linear-gradient(180deg, rgba(246, 245, 248, 0), rgba(246, 245, 248, 0.84) 34%, rgba(246, 245, 248, 0.98));
  border-top: 0;
}

.composer-inner {
  display: grid;
  gap: 9px;
  width: min(var(--content-width), 100%);
  max-width: 100%;
  min-width: 0;
  margin: 0 auto;
}

.composer-attachments,
.sheet-attachments {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
}

.composer-attachments[hidden],
.sheet-attachments[hidden] {
  display: none;
}

.composer-attachments::-webkit-scrollbar,
.sheet-attachments::-webkit-scrollbar {
  display: none;
}

.attachment-chip {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) 30px;
  align-items: center;
  gap: 9px;
  min-width: min(300px, calc(100vw - 34px));
  max-width: 330px;
  padding: 8px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.92);
  box-shadow: 0 16px 36px rgba(40, 39, 48, 0.09);
}

.attachment-thumb,
.attachment-file-badge {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  overflow: hidden;
  border-radius: 16px;
  background: var(--surface-muted);
  border: 1px dashed var(--border-strong);
  color: var(--muted);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0;
}

.attachment-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.attachment-copy {
  display: grid;
  min-width: 0;
  gap: 3px;
}

.attachment-copy strong,
.attachment-copy span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.attachment-copy strong {
  font-size: 12px;
  line-height: 1.2;
}

.attachment-copy span {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.2;
}

.attachment-chip.uploading .attachment-copy span {
  color: var(--accent-strong);
}

.attachment-chip.failed {
  border-color: color-mix(in srgb, var(--danger) 55%, var(--border));
}

.attachment-chip.failed .attachment-copy span {
  color: var(--danger);
}

.attachment-remove {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
}

.attachment-remove:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.attachment-remove svg {
  width: 16px;
  height: 16px;
}

.attachment-spinner {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  border: 2px solid color-mix(in srgb, var(--accent) 20%, transparent);
  border-top-color: var(--accent);
  animation: attachment-spin 760ms linear infinite;
}

.composer-shell {
  gap: 8px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  min-height: 64px;
  padding: 10px;
  border-radius: 32px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.96);
  box-shadow: 0 22px 70px rgba(40, 39, 48, 0.15);
}

.composer-shell:focus-within {
  border-color: rgba(255, 255, 255, 0.98);
  box-shadow:
    0 24px 78px rgba(40, 39, 48, 0.17),
    0 0 0 4px color-mix(in srgb, var(--accent) 11%, transparent);
}

.composer.drag-over .composer-shell {
  border-color: color-mix(in srgb, var(--accent) 52%, rgba(255, 255, 255, 0.96));
  box-shadow:
    0 24px 78px rgba(40, 39, 48, 0.17),
    0 0 0 5px color-mix(in srgb, var(--accent) 16%, transparent);
}

textarea {
  width: 100%;
  min-width: 0;
  resize: none;
  border: 0;
  background: transparent;
  color: var(--text);
  outline: none;
  line-height: 1.45;
}

.composer-shell textarea {
  flex: 1 1 auto;
  width: auto;
}

#promptInput {
  max-height: 150px;
  min-height: 40px;
  padding: 10px 6px;
  font-size: 16px;
}

textarea::placeholder,
input::placeholder {
  color: color-mix(in srgb, var(--muted) 64%, transparent);
}

.expand-tool[hidden] {
  display: none;
}

.composer.long-input .expand-tool {
  color: var(--accent-strong);
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 20%, transparent);
}

.attach-tool {
  color: var(--muted);
}

.attach-tool:hover,
.sheet-actions .icon-button:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.send-button {
  border-radius: 999px;
  background: #151519;
  color: #ffffff;
  box-shadow: 0 12px 28px rgba(21, 21, 25, 0.16);
}

.send-button:hover {
  background: #2b2b31;
}

.send-button.stop-mode {
  background: var(--danger);
  color: #ffffff;
}

.send-button.queue-mode {
  background: color-mix(in srgb, var(--accent) 78%, var(--success) 22%);
}

.send-button svg {
  width: 19px;
  height: 19px;
}

.scrim {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: block;
  background: rgba(21, 21, 25, 0.28);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
  backdrop-filter: blur(3px);
}

.scrim.open {
  opacity: 1;
  pointer-events: auto;
}

.composer-sheet {
  position: fixed;
  inset: auto 0 0;
  z-index: 30;
  display: grid;
  place-items: end center;
  pointer-events: none;
  transform: translateY(104%);
  transition: transform 220ms ease;
}

.composer-sheet.open {
  pointer-events: auto;
  transform: translateY(0);
}

.sheet-panel {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  width: min(760px, 100%);
  height: min(72dvh, 640px);
  padding: 9px 16px calc(16px + env(safe-area-inset-bottom));
  border-radius: 28px 28px 0 0;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.96);
  border-bottom: 0;
  box-shadow: var(--shadow);
}

.sheet-grabber {
  width: 46px;
  height: 5px;
  margin: 3px auto 11px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--muted) 30%, transparent);
}

.sheet-head {
  min-height: 44px;
}

.sheet-head strong {
  min-width: 0;
  overflow: hidden;
  font-size: 16px;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sheet-actions {
  gap: 7px;
}

.sheet-actions .icon-button {
  color: var(--muted);
}

.sheet-attachments {
  margin-top: 9px;
}

#expandedPromptInput {
  min-height: 0;
  margin-top: 11px;
  padding: 18px;
  border-radius: 24px;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  font-size: 17px;
  line-height: 1.55;
}

#expandedPromptInput:focus {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
}

.toast {
  position: fixed;
  right: 16px;
  bottom: calc(16px + env(safe-area-inset-bottom));
  z-index: 40;
  max-width: min(360px, calc(100vw - 32px));
  padding: 11px 14px;
  border-radius: 18px;
  background: #151519;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 160ms ease, transform 160ms ease;
  pointer-events: none;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

.hide-desktop {
  display: none;
}

@keyframes text-shimmer {
  0% {
    background-position: 130% 0;
  }

  100% {
    background-position: -130% 0;
  }
}

@keyframes attachment-spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 760px) {
  body.sheet-open,
  body.drawer-open {
    overflow: hidden;
  }

  .app-shell {
    display: block;
    height: var(--app-height);
    max-height: var(--app-height);
  }

  .edge-swipe-zone {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 5;
    display: block;
    width: 18px;
    pointer-events: none;
  }

  .session-pane {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 20;
    width: min(88vw, 348px);
    padding-top: max(16px, env(safe-area-inset-top));
    transform: translateX(-104%);
    transition: transform 210ms ease;
    box-shadow: var(--shadow);
  }

  .session-pane.open {
    transform: translateX(0);
  }

  .chat-pane {
    height: var(--app-height);
    max-height: var(--app-height);
  }

  .hide-desktop {
    display: inline-grid;
  }

  .top-bar {
    min-height: 62px;
    padding: max(10px, env(safe-area-inset-top)) 14px 8px;
  }

  .top-bar .icon-button {
    margin-left: -2px;
  }

  .title-row strong {
    font-size: 17px;
  }

  .messages {
    padding: 22px 12px 24px;
  }

  .message {
    grid-template-columns: minmax(0, 1fr);
    margin-bottom: 18px;
  }

  .message.user .bubble {
    max-width: min(90%, calc(100vw - 24px));
    padding: 15px 17px 13px;
  }

  .bubble-text {
    font-size: 15px;
    line-height: 1.56;
  }

  .quick-prompts {
    display: grid;
    grid-template-columns: 1fr;
  }

  .empty-copy strong {
    font-size: 25px;
  }

  .composer {
    padding: 12px 10px calc(12px + env(safe-area-inset-bottom));
  }

  .composer-shell {
    min-height: 60px;
    border-radius: 30px;
  }

  .attachment-chip {
    min-width: min(286px, calc(100vw - 28px));
  }

  .message-action {
    width: 32px;
    height: 32px;
  }

  .icon-button,
  .composer-tool,
  .send-button {
    width: 38px;
    height: 38px;
  }

  #promptInput {
    font-size: 16px;
  }
}

@media (min-width: 761px) {
  .scrim.open {
    opacity: 0;
    pointer-events: none;
  }

  body.sheet-open .scrim.open {
    opacity: 1;
    pointer-events: auto;
  }

  .composer-sheet {
    inset: 0;
    place-items: center;
    padding: 28px;
  }

  .composer-sheet.open {
    transform: translateY(0);
  }

  .sheet-panel {
    height: min(66vh, 620px);
    border-radius: 28px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.96);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }

  .live-heading strong,
  .context-step.active strong {
    background: none;
    color: var(--text);
    -webkit-text-fill-color: currentColor;
  }

  .attachment-spinner {
    animation-duration: 1ms !important;
  }
}

/* Keep wide equations inside their own scroll area on Telegram mobile. */
.math-display {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.2em 0;
}
.math-inline {
  display: inline-block;
  max-width: 100%;
  overflow-x: auto;
  vertical-align: middle;
}
.math-display, .math-inline, .katex {
  white-space: normal;
  overflow-wrap: normal;
  text-indent: 0;
}
.math-display > .katex-display {
  margin: 0.5em 0;
}
.live-preview:has(.math-display), .live-preview:has(.math-inline) {
  display: block;
  white-space: pre-wrap;
}