:root {
  color-scheme: light;
  --px-bg: #fbfaf4;
  --px-surface: #ffffff;
  --px-text: #13343b;
  --px-muted: #5d7378;
  --px-accent: #20808d;
  --px-accent-hover: #18656f;
  --px-border: #e7e5df;
  --px-shadow: 0 8px 32px rgba(19, 52, 59, 0.08);
  --px-radius: 16px;
  --px-font: "Söhne", "Inter", "Segoe UI", system-ui, sans-serif;
  --px-safe-bottom: env(safe-area-inset-bottom, 0px);
  --px-safe-top: env(safe-area-inset-top, 0px);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  font-family: var(--px-font);
  background: var(--px-bg);
  color: var(--px-text);
  line-height: 1.6;
}

.px-app {
  display: flex;
  min-height: 100vh;
  min-height: 100dvh;
}

.px-sidebar {
  width: 260px;
  flex-shrink: 0;
  border-right: 1px solid var(--px-border);
  background: var(--px-surface);
  display: flex;
  flex-direction: column;
  padding: 0.75rem 0.75rem 1rem;
  gap: 0.75rem;
}

.px-sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.25rem 0.15rem 0.5rem;
}

.px-sidebar-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--px-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.px-sidebar-close {
  display: none;
  width: 32px;
  height: 32px;
  border: 1px solid var(--px-border);
  border-radius: 8px;
  background: var(--px-bg);
  color: var(--px-text);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
}

.px-sidebar-close:hover {
  border-color: var(--px-accent);
  color: var(--px-accent);
}

.px-sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(19, 52, 59, 0.35);
  z-index: 15;
}

.px-sidebar-backdrop:not(.hidden) {
  display: block;
}

body.px-sidebar-open {
  overflow: hidden;
}

.px-new-thread {
  border: 1px dashed var(--px-border);
  background: transparent;
  border-radius: 12px;
  padding: 0.65rem 0.85rem;
  font: inherit;
  font-size: 0.9rem;
  color: var(--px-text);
  cursor: pointer;
  text-align: left;
}

.px-new-thread:hover {
  border-color: var(--px-accent);
  color: var(--px-accent);
}

.px-session-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-height: 0;
}

.px-session-empty {
  color: var(--px-muted);
  font-size: 0.85rem;
  margin: 0.5rem 0.25rem;
}

.px-session-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
  border: none;
  background: transparent;
  border-radius: 10px;
  padding: 0.55rem 0.65rem;
  font: inherit;
  text-align: left;
  cursor: pointer;
  flex: 1 1 auto;
  min-width: 0;
  color: var(--px-text);
}

.px-session-row {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  border-radius: 10px;
}

.px-session-row:hover { background: #f3f2ec; }
.px-session-row.active { background: #e6f3f4; color: var(--px-accent); }
.px-session-row.active .px-session-item { color: inherit; }

.px-session-move {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--px-muted);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0;
  opacity: 0;
  transition: opacity 0.12s, background 0.12s, color 0.12s;
}

.px-session-row:hover .px-session-move,
.px-session-row.active .px-session-move {
  opacity: 1;
}

.px-session-move:hover {
  background: rgba(32, 128, 141, 0.12);
  color: var(--px-accent);
}

.px-session-item:hover { background: transparent; }
.px-session-item.active { background: transparent; }

.px-session-title {
  font-size: 0.85rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  width: 100%;
}

.px-session-meta {
  font-size: 0.72rem;
  color: var(--px-muted);
}

.px-session-meta-row {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
  width: 100%;
}

.px-session-space {
  font-size: 0.68rem;
  color: var(--px-accent);
  background: #e6f3f4;
  border-radius: 999px;
  padding: 0.05rem 0.45rem;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.px-session-move-menu {
  position: fixed;
  z-index: 60;
  min-width: 220px;
  max-width: min(280px, calc(100vw - 16px));
  background: var(--px-surface);
  border: 1px solid var(--px-border);
  border-radius: 12px;
  box-shadow: 0 10px 32px rgba(19, 52, 59, 0.16);
  padding: 0.35rem;
}

.px-session-move-head {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--px-muted);
  padding: 0.35rem 0.55rem 0.25rem;
}

.px-session-move-empty {
  margin: 0;
  padding: 0.35rem 0.55rem 0.55rem;
  font-size: 0.78rem;
  color: var(--px-muted);
}

.px-session-move-option {
  display: block;
  width: 100%;
  border: none;
  border-radius: 8px;
  background: transparent;
  padding: 0.45rem 0.55rem;
  font: inherit;
  font-size: 0.82rem;
  text-align: left;
  cursor: pointer;
  color: var(--px-text);
}

.px-session-move-option:hover {
  background: #f3f2ec;
}

.px-session-move-option.active {
  background: #e6f3f4;
  color: var(--px-accent);
  font-weight: 600;
}

.px-session-move-clear {
  margin-top: 0.2rem;
  border-top: 1px solid var(--px-border);
  border-radius: 0 0 8px 8px;
  color: #b45309;
}

.px-usage {
  font-size: 0.75rem;
  color: var(--px-muted);
  padding: 0.5rem 0.25rem 0;
  border-top: 1px solid var(--px-border);
}

.px-shell {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.px-sidebar-toggle {
  display: none;
  border: 1px solid var(--px-border);
  background: var(--px-surface);
  border-radius: 8px;
  padding: 0.35rem 0.55rem;
  cursor: pointer;
  font: inherit;
}

.px-header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.px-model-picker {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  flex-shrink: 0;
}

.px-model-picker-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--px-muted);
  white-space: nowrap;
}

@media (max-width: 520px) {
  .px-model-picker-label {
    display: none;
  }
}

.px-model-picker select {
  appearance: none;
  border: 1px solid var(--px-border);
  border-radius: 999px;
  height: 36px;
  padding: 0 1.65rem 0 0.75rem;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 500;
  background: var(--px-surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235d7378' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right 0.45rem center;
  color: var(--px-text);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background-color 0.15s;
}

.px-model-picker select:hover,
.px-model-picker select:focus {
  border-color: var(--px-muted);
  color: var(--px-text);
  outline: none;
}

.px-export-picker {
  display: inline-flex;
  align-items: center;
  margin: 0;
  flex-shrink: 0;
}

.px-export-picker select {
  appearance: none;
  border: 1px solid rgba(180, 83, 9, 0.35);
  border-radius: 999px;
  height: 36px;
  padding: 0 1.65rem 0 0.75rem;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 500;
  background: #fff8ed url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23b45309' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right 0.45rem center;
  color: #b45309;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background-color 0.15s;
  max-width: min(130px, 28vw);
}

.px-export-picker select:hover,
.px-export-picker select:focus {
  border-color: #b45309;
  outline: none;
}

.px-export-btn-active {
  border-color: var(--px-accent) !important;
  color: var(--px-accent) !important;
  background: #e6f3f4 !important;
}

.px-export-btn-primary {
  border-color: #b45309 !important;
  color: #b45309 !important;
  background: #fff8ed !important;
}

.px-skill-picker {
  display: inline-flex;
  align-items: center;
  margin: 0;
  flex-shrink: 0;
}

.px-skill-picker select {
  appearance: none;
  border: 1px solid rgba(32, 128, 141, 0.35);
  border-radius: 999px;
  padding: 0.28rem 1.65rem 0.28rem 1.75rem;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  background: #e6f3f4 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2320808d' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right 0.45rem center;
  color: var(--px-accent);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background-color 0.15s;
}

.px-skill-picker select:hover,
.px-skill-picker select:focus {
  border-color: var(--px-accent);
  outline: none;
}

/* Header auth & account */
.px-btn-primary {
  border: none;
  border-radius: 999px;
  padding: 0.45rem 1rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--px-text);
  color: white;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.px-btn-primary:hover {
  background: #0f282e;
}

.px-btn-ghost {
  border: 1px solid var(--px-border);
  border-radius: 999px;
  padding: 0.42rem 0.95rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  background: transparent;
  color: var(--px-text);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.px-btn-ghost:hover {
  border-color: var(--px-muted);
}

.px-btn-icon {
  width: 36px;
  height: 36px;
  border: 1px solid var(--px-border);
  border-radius: 999px;
  background: var(--px-surface);
  color: var(--px-muted);
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0;
  transition: border-color 0.15s, color 0.15s;
}

.px-btn-icon svg {
  width: 18px;
  height: 18px;
}

.px-btn-icon:hover {
  border-color: var(--px-accent);
  color: var(--px-accent);
}

.px-header-auth {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.px-user-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid var(--px-border);
  border-radius: 999px;
  padding: 0.2rem 0.65rem 0.2rem 0.2rem;
  background: var(--px-surface);
  font: inherit;
  font-size: 0.82rem;
  color: var(--px-text);
  cursor: pointer;
  transition: border-color 0.15s;
}

.px-user-chip:hover {
  border-color: var(--px-accent);
}

.px-user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, #20808d, #5b3ea8);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.px-user-name {
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Mode picker — Perplexity-style dropdown */
.px-mode-menu {
  position: relative;
  flex-shrink: 0;
}

.px-mode-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid rgba(32, 128, 141, 0.35);
  border-radius: 999px;
  padding: 0 0.55rem 0 0.45rem;
  height: 36px;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  background: #e6f3f4;
  color: var(--px-accent);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
  max-width: min(160px, 34vw);
}

.px-mode-trigger:hover:not(:disabled) {
  border-color: var(--px-accent);
}

.px-mode-trigger:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.px-mode-trigger-icon {
  width: 16px;
  height: 16px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.px-mode-trigger-icon svg {
  width: 14px;
  height: 14px;
}

.px-mode-trigger-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.px-mode-trigger-chevron {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  opacity: 0.7;
  transition: transform 0.15s;
}

.px-mode-menu.open .px-mode-trigger-chevron {
  transform: rotate(180deg);
}

.px-mode-dropdown {
  position: absolute;
  left: 0;
  bottom: calc(100% + 0.45rem);
  z-index: 30;
  min-width: 280px;
  max-width: min(340px, 92vw);
  background: var(--px-surface);
  border: 1px solid var(--px-border);
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(19, 52, 59, 0.14);
  padding: 0;
  max-height: min(480px, 68vh);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.px-mode-dropdown-body {
  overflow-y: auto;
  padding: 0.45rem;
  flex: 1 1 auto;
  min-height: 0;
}

.px-mode-footer {
  flex-shrink: 0;
  border-top: 1px solid var(--px-border);
  padding: 0.45rem 0.45rem 0.4rem;
  background: #faf9f6;
}

.px-mode-footer .px-mode-group-label {
  padding-left: 0.35rem;
  padding-bottom: 0.35rem;
}

.px-mode-footer.hidden {
  display: none;
}

.px-travel-variants {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0 0.15rem;
}

.px-travel-variant {
  border: 1px solid rgba(91, 62, 168, 0.35);
  border-radius: 999px;
  background: #fff;
  color: #5b3ea8;
  font: inherit;
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.35rem 0.65rem;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
}

.px-travel-variant:hover:not(:disabled) {
  background: #f3f0ff;
  border-color: #5b3ea8;
}

.px-travel-variant.active {
  background: #5b3ea8;
  border-color: #5b3ea8;
  color: #fff;
}

.px-travel-variant:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.px-mode-menu[data-mode="travel"] .px-export-picker select {
  background-color: #f3f0ff;
  border-color: rgba(91, 62, 168, 0.35);
  color: #5b3ea8;
}

.px-home[data-mode="travel"] .px-export-picker select {
  background-color: #f3f0ff;
  border-color: rgba(91, 62, 168, 0.35);
  color: #5b3ea8;
}

.px-mode-group + .px-mode-group {
  margin-top: 0.35rem;
  padding-top: 0.35rem;
  border-top: 1px solid var(--px-border);
}

.px-mode-group-label {
  display: block;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--px-muted);
  padding: 0.25rem 0.5rem 0.35rem;
}

.px-mode-option {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
  border: none;
  border-radius: 12px;
  background: transparent;
  padding: 0.55rem 0.55rem;
  font: inherit;
  text-align: left;
  cursor: pointer;
  color: var(--px-text);
  transition: background 0.12s;
}

.px-mode-option:hover {
  background: #f3f2ec;
}

.px-mode-option.active {
  background: #e6f3f4;
}

.px-mode-option-icon {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--px-bg);
  border: 1px solid var(--px-border);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  color: var(--px-accent);
}

.px-mode-option-icon svg {
  width: 16px;
  height: 16px;
}

.px-mode-option-text {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.px-mode-option-label {
  font-size: 0.86rem;
  font-weight: 600;
}

.px-mode-option-desc {
  font-size: 0.72rem;
  color: var(--px-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.px-mode-option-check {
  opacity: 0;
  color: var(--px-accent);
  font-weight: 700;
  font-size: 0.85rem;
}

.px-mode-option.active .px-mode-option-check {
  opacity: 1;
}

/* Perplexity-style model picker */
.px-model-menu {
  position: relative;
  flex-shrink: 0;
}

.px-model-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  height: 36px;
  min-width: 118px;
  max-width: min(220px, 42vw);
  padding: 0 0.55rem 0 0.45rem;
  border: 1px solid var(--px-border);
  border-radius: 999px;
  background: var(--px-surface);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--px-text);
  cursor: pointer;
  transition: border-color 0.15s, background-color 0.15s, box-shadow 0.15s;
}

.px-model-trigger-icon {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 999px;
  background: linear-gradient(135deg, #e6f3f4, #f0ebff);
  color: var(--px-accent);
  flex-shrink: 0;
}

.px-model-trigger-icon svg {
  width: 13px;
  height: 13px;
}

.px-model-trigger-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 0;
  line-height: 1.15;
}

.px-model-trigger-meta {
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--px-muted);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.px-model-trigger:hover {
  border-color: var(--px-muted);
}

.px-model-trigger-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.px-model-trigger-chevron {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  opacity: 0.65;
}

.px-model-dropdown {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 0;
  z-index: 40;
  width: min(380px, calc(100vw - 2rem));
  max-height: min(520px, 70vh);
  overflow: hidden;
  border: 1px solid var(--px-border);
  border-radius: 16px;
  background: var(--px-surface);
  box-shadow: 0 16px 48px rgba(19, 52, 59, 0.14);
}

.px-model-dropdown-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.45rem;
  font-size: 0.92rem;
}

.px-model-count {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--px-muted);
  background: var(--px-bg);
  border: 1px solid var(--px-border);
  border-radius: 999px;
  padding: 0.15rem 0.5rem;
}

.px-model-view-filters {
  display: flex;
  gap: 0.35rem;
  padding: 0.35rem 0 0.1rem;
}

.px-model-filter-chip--view {
  font-weight: 700;
}

.px-model-provider-filters {
  display: flex;
  gap: 0.35rem;
  overflow-x: auto;
  padding: 0.15rem 0 0.15rem;
  scrollbar-width: none;
}

.px-model-provider-filters::-webkit-scrollbar {
  display: none;
}

.px-model-filter-chip {
  flex-shrink: 0;
  border: 1px solid var(--px-border);
  border-radius: 999px;
  padding: 0.28rem 0.65rem;
  font: inherit;
  font-size: 0.72rem;
  font-weight: 600;
  background: var(--px-bg);
  color: var(--px-muted);
  cursor: pointer;
}

.px-model-filter-chip:hover,
.px-model-filter-chip.active {
  border-color: var(--px-accent);
  color: var(--px-accent);
  background: #e6f3f4;
}

.px-model-plan-note {
  margin: 0.35rem 0.55rem 0.25rem;
  font-size: 0.72rem;
  color: var(--px-muted);
}

.px-model-lock {
  display: inline-block;
  margin-left: 0.35rem;
  font-size: 0.58rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.1rem 0.35rem;
  border-radius: 999px;
  background: #fff3e0;
  color: #b45309;
}

.px-model-option.unavailable {
  opacity: 0.45;
}

.px-model-unavailable {
  display: inline-block;
  margin-left: 0.35rem;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--px-muted);
}

.px-model-option.locked .px-model-option-desc::after {
  content: " · нужен Plus/Pro";
}

.px-model-menu.open .px-model-trigger {
  border-color: var(--px-accent);
  box-shadow: 0 0 0 3px rgba(32, 128, 141, 0.12);
}

.px-model-sheet-backdrop {
  display: none;
}

.px-model-dropdown-head {
  padding: 0.45rem 0.45rem 0.15rem;
  border-bottom: 1px solid var(--px-border);
}

.px-model-search {
  width: 100%;
  border: 1px solid var(--px-border);
  border-radius: 10px;
  padding: 0.45rem 0.65rem;
  font-size: 0.86rem;
  background: var(--px-bg);
  color: var(--px-text);
}

.px-model-search:focus {
  outline: none;
  border-color: var(--px-accent);
}

.px-model-sync-note,
.px-model-empty {
  margin: 0.35rem 0.55rem 0.5rem;
  font-size: 0.75rem;
  color: var(--px-muted);
}

.px-model-badges {
  display: inline-flex;
  gap: 0.25rem;
  margin-left: 0.35rem;
  vertical-align: middle;
}

.px-model-badge {
  display: inline-block;
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.12rem 0.35rem;
  border-radius: 999px;
  background: #eef2f2;
  color: var(--px-muted);
}

.px-mode-hint {
  margin: -0.5rem 0 0;
  font-size: 0.82rem;
  color: var(--px-muted);
}

.px-answer-meta {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--px-accent);
  margin-bottom: 0.35rem;
}

.px-code-block {
  position: relative;
  margin: 0.75rem 0;
}

.px-code-block pre {
  margin: 0;
  border-radius: 12px;
  overflow-x: auto;
}

.px-code-copy {
  position: absolute;
  top: 0.45rem;
  right: 0.45rem;
  border: 1px solid var(--px-border);
  background: rgba(255, 255, 255, 0.92);
  border-radius: 8px;
  padding: 0.2rem 0.55rem;
  font-size: 0.72rem;
  cursor: pointer;
}

.px-answer pre:not(.px-math-fallback) {
  background: #0f172a;
  color: #e2e8f0;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  overflow-x: auto;
}

.px-answer pre code {
  background: transparent;
  padding: 0;
  color: inherit;
  font-size: 0.88em;
}

.px-answer blockquote {
  margin: 0.75rem 0;
  padding: 0.35rem 0.9rem;
  border-left: 3px solid var(--px-accent);
  color: var(--px-muted);
}

.px-answer table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0;
  font-size: 0.92rem;
}

.px-answer th,
.px-answer td {
  border: 1px solid var(--px-border);
  padding: 0.4rem 0.55rem;
  text-align: left;
}

.px-source-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 0;
}

.px-source-favicon {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  flex-shrink: 0;
}

.px-source-domain {
  font-size: 0.72rem;
  color: var(--px-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.px-model-dropdown-body {
  max-height: min(380px, 55vh);
  overflow-y: auto;
  padding: 0.35rem;
}

.px-model-group-label {
  display: block;
  padding: 0.45rem 0.55rem 0.25rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--px-muted);
}

.px-model-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  border: none;
  border-radius: 10px;
  background: transparent;
  padding: 0.55rem 0.6rem;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: var(--px-text);
}

.px-model-option:hover {
  background: rgba(32, 128, 141, 0.08);
}

.px-model-option.active {
  background: rgba(32, 128, 141, 0.12);
}

.px-model-option-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 0;
  flex: 1;
}

.px-model-option-label {
  font-size: 0.84rem;
  font-weight: 600;
}

.px-model-option-desc {
  font-size: 0.72rem;
  color: var(--px-muted);
  line-height: 1.35;
}

.px-model-option-check {
  opacity: 0;
  color: var(--px-accent);
  font-weight: 700;
  font-size: 0.85rem;
}

.px-model-option.active .px-model-option-check {
  opacity: 1;
}

.px-model-menu.open .px-model-trigger {
  border-color: var(--px-accent);
  color: var(--px-accent);
}

.px-mode-menu[data-mode="search"] .px-mode-trigger {
  background: #eef6ff;
  border-color: rgba(29, 79, 145, 0.35);
  color: #1d4f91;
}

.px-mode-menu[data-mode="travel"] .px-mode-trigger {
  background: #f3f0ff;
  border-color: rgba(91, 62, 168, 0.35);
  color: #5b3ea8;
}

.px-mode-menu[data-mode="deep_research"] .px-mode-trigger {
  background: #fff4e6;
  border-color: rgba(180, 83, 9, 0.35);
  color: #b45309;
}

.px-mode-menu[data-mode="learn"] .px-mode-trigger {
  background: #ecfdf5;
  border-color: rgba(5, 122, 85, 0.35);
  color: #047857;
}

.px-mode-menu[data-mode="academic"] .px-mode-trigger {
  background: #f5f3ff;
  border-color: rgba(91, 62, 168, 0.3);
  color: #6d28d9;
}

.px-mode-menu[data-mode="writing"] .px-mode-trigger {
  background: #fdf2f8;
  border-color: rgba(190, 24, 93, 0.3);
  color: #be185d;
}

.px-mode-menu[data-mode="math"] .px-mode-trigger {
  background: #eff6ff;
  border-color: rgba(37, 99, 235, 0.3);
  color: #2563eb;
}

.px-home[data-mode="search"] .px-mode-badge {
  background: #eef6ff;
  color: #1d4f91;
  border-color: rgba(29, 79, 145, 0.25);
}

.px-home[data-mode="travel"] .px-mode-badge {
  background: #f3f0ff;
  color: #5b3ea8;
  border-color: rgba(91, 62, 168, 0.25);
}

.px-home[data-mode="deep_research"] .px-mode-badge {
  background: #fff4e6;
  color: #b45309;
  border-color: rgba(180, 83, 9, 0.25);
}

.px-home[data-mode="learn"] .px-mode-badge {
  background: #ecfdf5;
  color: #047857;
  border-color: rgba(5, 122, 85, 0.25);
}

.px-home[data-mode="academic"] .px-mode-badge {
  background: #f5f3ff;
  color: #6d28d9;
  border-color: rgba(91, 62, 168, 0.25);
}

.px-home[data-mode="writing"] .px-mode-badge {
  background: #fdf2f8;
  color: #be185d;
  border-color: rgba(190, 24, 93, 0.25);
}

.px-home[data-mode="math"] .px-mode-badge {
  background: #eff6ff;
  color: #2563eb;
  border-color: rgba(37, 99, 235, 0.25);
}

/* Modals */
body.px-modal-open {
  overflow: hidden;
}

.px-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(19, 52, 59, 0.45);
  display: grid;
  place-items: center;
  padding: 1rem;
}

.px-modal-backdrop.hidden {
  display: none;
}

.px-modal {
  position: relative;
  width: min(440px, 100%);
  max-height: min(90vh, 720px);
  overflow-y: auto;
  background: var(--px-surface);
  border: 1px solid var(--px-border);
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(19, 52, 59, 0.2);
  padding: 1.35rem 1.35rem 1.5rem;
}

.px-modal-close {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  width: 32px;
  height: 32px;
  border: 1px solid var(--px-border);
  border-radius: 8px;
  background: var(--px-bg);
  color: var(--px-muted);
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
}

.px-modal-close:hover {
  color: var(--px-text);
  border-color: var(--px-muted);
}

.px-modal-title {
  margin: 0 0 0.35rem;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.px-modal-subtitle {
  margin: 0 0 1rem;
  color: var(--px-muted);
  font-size: 0.9rem;
}

.px-modal-footnote {
  margin: 1rem 0 0;
  font-size: 0.75rem;
  color: var(--px-muted);
}

.px-auth-tabs {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 1rem;
  padding: 0.2rem;
  background: var(--px-bg);
  border-radius: 999px;
  border: 1px solid var(--px-border);
}

.px-auth-tab {
  flex: 1;
  border: none;
  border-radius: 999px;
  padding: 0.45rem 0.75rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  background: transparent;
  color: var(--px-muted);
  cursor: pointer;
}

.px-auth-tab.active {
  background: var(--px-surface);
  color: var(--px-text);
  box-shadow: 0 1px 4px rgba(19, 52, 59, 0.08);
}

.px-auth-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.px-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.82rem;
  font-weight: 500;
}

.px-field input,
.px-settings-select {
  border: 1px solid var(--px-border);
  border-radius: 12px;
  padding: 0.65rem 0.75rem;
  font: inherit;
  font-size: 0.92rem;
  background: var(--px-bg);
  color: var(--px-text);
}

.px-field input:focus,
.px-settings-select:focus {
  outline: none;
  border-color: var(--px-accent);
}

.px-btn-full {
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.7rem 1rem;
}

.px-btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.82rem;
}

.px-btn-danger {
  border: 1px solid #fecdca;
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
  font: inherit;
  font-size: 0.82rem;
  background: #fef3f2;
  color: #b42318;
  cursor: pointer;
}

.px-btn-danger:hover {
  background: #fee4e2;
}

.px-settings-section {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--px-border);
}

.px-settings-section:first-of-type {
  margin-top: 0.75rem;
  padding-top: 0;
  border-top: none;
}

.px-settings-section h3 {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.px-settings-muted {
  margin: 0 0 0.65rem;
  font-size: 0.88rem;
  color: var(--px-muted);
}

.px-settings-section .px-btn-ghost,
.px-settings-section .px-btn-danger {
  margin-right: 0.5rem;
  margin-top: 0.25rem;
}

.px-home[data-mode="search"] .px-skill-picker select {
  background-color: #eef6ff;
  border-color: rgba(29, 79, 145, 0.35);
  color: #1d4f91;
}

.px-home[data-mode="travel"] .px-skill-picker select {
  background-color: #f3f0ff;
  border-color: rgba(91, 62, 168, 0.35);
  color: #5b3ea8;
}


a { color: var(--px-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header — Perplexity-like top bar */
.px-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--px-border);
  background: var(--px-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.px-header-spacer {
  flex: 1;
}

.px-logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--px-text);
}

.px-logo span { color: var(--px-accent); }

.px-nav {
  display: flex;
  gap: 1.25rem;
  align-items: center;
  font-size: 0.9rem;
}

.px-nav a { color: var(--px-muted); }
.px-nav a:hover { color: var(--px-accent); text-decoration: none; }

.px-mode-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--px-accent);
  background: #e6f3f4;
  border: 1px solid rgba(32, 128, 141, 0.25);
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
  margin-bottom: 0.25rem;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.px-home[data-mode="search"] .px-mode-badge {
  background: #eef6ff;
  color: #1d4f91;
  border-color: rgba(29, 79, 145, 0.25);
}

.px-home[data-mode="travel"] .px-mode-badge {
  background: #f3f0ff;
  color: #5b3ea8;
  border-color: rgba(91, 62, 168, 0.25);
}

.px-hint-chip-hidden {
  display: none;
}

.px-trip-link {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.5rem 0.85rem;
  border-radius: 12px;
  background: var(--px-accent);
  color: white !important;
  text-decoration: none !important;
  font-size: 0.9rem;
}

/* Home — centered search like perplexity.ai */
.px-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.px-home {
  min-height: calc(100vh - 80px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1.5rem;
  padding-top: 4vh;
}

.px-home h1 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 0;
}

.px-tagline {
  color: var(--px-muted);
  margin: 0;
  font-size: 1.05rem;
}

/* Skills panel — Perplexity-like horizontal plaque above search */
.px-skills-panel {
  width: 100%;
  max-width: 680px;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  text-align: left;
}

.px-skills-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0 0.15rem;
}

.px-skills-title {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--px-muted);
}

.px-skills-hint {
  font-size: 0.78rem;
  color: var(--px-muted);
  opacity: 0.85;
}

.px-skills-rail {
  display: flex;
  gap: 0.55rem;
  overflow-x: auto;
  padding: 0.15rem 0.1rem 0.35rem;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.px-skills-rail::-webkit-scrollbar {
  height: 6px;
}

.px-skills-rail::-webkit-scrollbar-thumb {
  background: rgba(32, 128, 141, 0.25);
  border-radius: 999px;
}

.px-skill-card {
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-width: 132px;
  max-width: 200px;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--px-border);
  border-radius: 16px;
  background: var(--px-surface);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s, transform 0.12s;
  text-align: left;
}

.px-skill-card:hover:not(:disabled) {
  border-color: rgba(32, 128, 141, 0.45);
  box-shadow: 0 4px 14px rgba(32, 128, 141, 0.08);
  transform: translateY(-1px);
}

.px-skill-card:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.px-skill-card.active {
  border-color: var(--px-accent);
  background: #e6f3f4;
  box-shadow: 0 0 0 1px rgba(32, 128, 141, 0.15);
}

.px-skill-card-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: rgba(32, 128, 141, 0.08);
  color: var(--px-accent);
}

.px-skill-card-icon svg {
  width: 16px;
  height: 16px;
}

.px-skill-card-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 0;
}

.px-skill-card-label {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--px-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.px-skill-card-desc {
  font-size: 0.72rem;
  color: var(--px-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.px-skills-travel {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 0.35rem 0.15rem 0;
}

.px-skills-travel.hidden {
  display: none;
}

.px-skills-subtitle {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--px-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.px-skills-sub-rail {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.px-skill-sub {
  border: 1px solid var(--px-border);
  background: var(--px-surface);
  color: var(--px-text);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.px-skill-sub:hover:not(:disabled) {
  border-color: rgba(91, 62, 168, 0.45);
}

.px-skill-sub.active {
  border-color: #5b3ea8;
  background: #f3f0ff;
  color: #5b3ea8;
}

.px-skill-sub:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.px-skills-panel[data-mode="search"] .px-skill-card.active {
  border-color: #1d4f91;
  background: #eef6ff;
}

.px-skills-panel[data-mode="search"] .px-skill-card.active .px-skill-card-icon {
  background: rgba(29, 79, 145, 0.12);
  color: #1d4f91;
}

.px-skills-panel[data-mode="travel"] .px-skill-card.active {
  border-color: #5b3ea8;
  background: #f3f0ff;
}

.px-skills-panel[data-mode="travel"] .px-skill-card.active .px-skill-card-icon {
  background: rgba(91, 62, 168, 0.12);
  color: #5b3ea8;
}

.px-skills-panel[data-mode="deep_research"] .px-skill-card.active {
  border-color: #0f766e;
  background: #ecfdf5;
}

.px-skills-panel[data-mode="deep_research"] .px-skill-card.active .px-skill-card-icon {
  background: rgba(15, 118, 110, 0.12);
  color: #0f766e;
}

.px-skills-panel--compact {
  max-width: none;
  margin-bottom: 0.65rem;
}

.px-skills-panel--compact .px-skills-head,
.px-skills-panel--compact .px-skills-hint,
.px-skills-panel--compact .px-skills-subtitle {
  display: none;
}

.px-skills-panel--compact .px-skill-card {
  min-width: 108px;
  padding: 0.45rem 0.6rem;
}

.px-skills-panel--compact .px-skill-card-desc {
  display: none;
}

/* Search box */
.px-search-wrap {
  width: 100%;
  max-width: 680px;
  position: relative;
}

.px-search-box {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: 100%;
  background: var(--px-surface);
  border: 1px solid var(--px-border);
  border-radius: 24px;
  padding: 0.85rem 0.9rem 0.65rem;
  box-shadow: var(--px-shadow);
  transition: border-color 0.15s, box-shadow 0.15s;
  overflow: visible;
}

.px-search-row {
  display: block;
  width: 100%;
}

.px-composer-bar {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: nowrap;
  width: 100%;
  min-height: 36px;
  overflow: visible;
}

.px-composer-bar > .px-attach-btn,
.px-composer-bar > .px-mode-menu,
.px-composer-bar > .px-model-picker,
.px-composer-bar > .px-model-menu,
.px-composer-bar > .px-export-picker,
.px-composer-bar > .px-voice-btn,
.px-composer-bar > .px-submit-btn {
  flex-shrink: 0;
}

.px-composer-spacer {
  flex: 1 1 auto;
  min-width: 0.25rem;
  align-self: stretch;
}

.px-attach-btn {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border: 1px solid var(--px-border);
  border-radius: 999px;
  background: var(--px-bg);
  color: var(--px-muted);
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0;
  transition: border-color 0.15s, color 0.15s;
}

.px-attach-btn svg {
  width: 15px;
  height: 15px;
}

.px-attach-btn:hover {
  border-color: var(--px-accent);
  color: var(--px-accent);
}

.px-file-input.hidden {
  display: none;
}

.px-attachments {
  display: none;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0 0.15rem 0.35rem;
}

.px-attachments.has-items {
  display: flex;
}

.px-attachment-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  max-width: 100%;
  border: 1px solid var(--px-border);
  border-radius: 12px;
  background: var(--px-bg);
  padding: 0.25rem 0.35rem 0.25rem 0.25rem;
  font-size: 0.78rem;
}

.px-attachment-thumb {
  width: 32px;
  height: 32px;
  object-fit: cover;
  border-radius: 8px;
}

.px-attachment-icon {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #eef2f2;
}

.px-attachment-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 140px;
}

.px-attachment-remove {
  border: none;
  background: transparent;
  color: var(--px-muted);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0 0.2rem;
}

.px-attachment-remove:hover {
  color: #b42318;
}

.px-query-attachments {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: -0.35rem 0 0.75rem;
}

.px-query-attachment {
  font-size: 0.78rem;
  color: var(--px-muted);
  background: var(--px-surface);
  border: 1px solid var(--px-border);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
}

.px-query-attachment::before {
  content: "📎 ";
}

.px-search-box:focus-within {
  border-color: var(--px-accent);
  box-shadow: 0 8px 32px rgba(32, 128, 141, 0.12);
}

.px-search-box.px-drag-over {
  border-color: var(--px-accent);
  background: #f7fcfc;
}

.hidden {
  display: none !important;
}

.px-voice-btn {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border: 1px solid var(--px-border);
  border-radius: 50%;
  background: var(--px-bg);
  color: var(--px-muted);
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.px-voice-btn svg {
  width: 16px;
  height: 16px;
}

.px-voice-btn:hover:not(:disabled) {
  border-color: var(--px-accent);
  color: var(--px-accent);
}

.px-voice-btn.listening {
  border-color: #d92d20;
  color: #d92d20;
  background: #fef3f2;
  animation: px-mic-pulse 1.2s ease-in-out infinite;
}

.px-voice-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

@keyframes px-mic-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(217, 45, 32, 0.25); }
  50% { box-shadow: 0 0 0 6px rgba(217, 45, 32, 0); }
}

.px-search-row textarea {
  display: block;
  width: 100%;
  border: none;
  outline: none;
  resize: none;
  font: inherit;
  font-size: 1rem;
  background: transparent;
  color: var(--px-text);
  min-height: 28px;
  max-height: 160px;
  line-height: 1.5;
  padding: 0;
  margin: 0;
}

.px-submit-btn {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: var(--px-accent);
  color: white;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background 0.15s;
}

.px-submit-btn:hover:not(:disabled) {
  background: var(--px-accent-hover);
}

.px-submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.px-submit-btn svg {
  width: 18px;
  height: 18px;
}

.px-hints {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 0.5rem;
}

.px-hint-chip {
  border: 1px solid var(--px-border);
  background: var(--px-surface);
  border-radius: 999px;
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
  color: var(--px-muted);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.px-hint-chip:hover {
  border-color: var(--px-accent);
  color: var(--px-accent);
}

/* Thread view */
.px-thread { display: flex; flex-direction: column; gap: 2rem; }
.px-thread.hidden, .px-home.hidden { display: none; }

.px-query {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
}

.px-answer-block { display: flex; flex-direction: column; gap: 1rem; }

.px-status {
  color: var(--px-muted);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.px-status::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--px-accent);
  animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

.px-answer {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--px-text);
  word-wrap: break-word;
}

.px-answer h3,
.px-answer h4 {
  margin: 1rem 0 0.5rem;
  font-weight: 600;
  line-height: 1.35;
}

.px-answer h3:first-child,
.px-answer h4:first-child {
  margin-top: 0;
}

.px-answer .px-math-block {
  margin: 0.85rem 0;
  overflow-x: auto;
  text-align: center;
}

.px-answer .katex-display {
  margin: 0.35rem 0;
}

.px-answer .px-math-fallback {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.92em;
  background: #eef2f2;
  border-radius: 8px;
  padding: 0.35rem 0.55rem;
}

.px-answer .px-math-block .px-math-fallback {
  display: block;
  text-align: left;
  white-space: pre-wrap;
}

.px-answer p { margin: 0 0 0.75rem; }
.px-answer p:last-child { margin-bottom: 0; }
.px-answer ul, .px-answer ol { margin: 0.5rem 0; padding-left: 1.25rem; }
.px-answer strong { font-weight: 600; }
.px-answer code {
  background: #eef2f2;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.px-cite {
  color: var(--px-accent);
  font-size: 0.75em;
  vertical-align: super;
  font-weight: 600;
  text-decoration: none;
  margin-left: 1px;
}

.px-cite:hover { text-decoration: underline; }

/* Sources row — Perplexity source cards */
.px-sources {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.px-source-card {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  max-width: 220px;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--px-border);
  border-radius: 12px;
  background: var(--px-surface);
  font-size: 0.8rem;
  color: var(--px-text);
  text-decoration: none;
  transition: border-color 0.15s;
}

.px-source-card:hover {
  border-color: var(--px-accent);
  text-decoration: none;
}

.px-source-index {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: #eef6f6;
  color: var(--px-accent);
  font-size: 0.7rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.px-source-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Related questions */
.px-related {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--px-border);
}

.px-related h3 {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--px-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.px-related-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.px-related-item {
  text-align: left;
  border: 1px solid var(--px-border);
  background: var(--px-surface);
  border-radius: 12px;
  padding: 0.65rem 0.85rem;
  font: inherit;
  font-size: 0.92rem;
  color: var(--px-text);
  cursor: pointer;
  transition: border-color 0.15s;
}

.px-related-item:hover {
  border-color: var(--px-accent);
  color: var(--px-accent);
}

/* Follow-up bar (sticky bottom) */
.px-followup-wrap {
  position: sticky;
  bottom: 0;
  margin-top: 2rem;
  padding-bottom: env(safe-area-inset-bottom, 0);
  background: linear-gradient(to top, var(--px-bg) 72%, transparent);
}

.px-error {
  color: #b42318;
  background: #fef3f2;
  border: 1px solid #fecdca;
  border-radius: 12px;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
}

/* Legacy landing / legal */
.hero { padding: 2rem 1.5rem 3rem; max-width: 960px; margin: 0 auto; }
.hero.compact { padding-bottom: 1rem; }

.about-page .about-eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--px-muted);
}

.about-page h1 {
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.about-page .about-list {
  margin: 0;
  padding-left: 1.25rem;
  line-height: 1.65;
}

.about-page .about-list li + li {
  margin-top: 0.5rem;
}

.about-page .about-note {
  margin-top: 0.75rem;
  font-size: 0.9rem;
}

.about-page .about-stack {
  font-size: 1rem;
  max-width: 42rem;
}

.about-page section {
  margin-top: 2.5rem;
}

.about-page section h2 {
  margin-bottom: 1rem;
}

.nav { display: flex; gap: 1rem; margin-bottom: 2rem; flex-wrap: wrap; }
.lead { color: var(--px-muted); max-width: 720px; }
.cta-row { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.5rem; }
.btn {
  display: inline-block;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--px-border);
  text-decoration: none;
  color: var(--px-text);
}
.btn.primary { background: var(--px-accent); color: white; border-color: transparent; }
main, footer { max-width: 960px; margin: 0 auto; padding: 0 1.5rem 3rem; }
section { margin: 2.5rem 0; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}
article {
  background: var(--px-surface);
  border: 1px solid var(--px-border);
  border-radius: var(--px-radius);
  padding: 1rem;
}
table { width: 100%; border-collapse: collapse; }
th, td { border: 1px solid var(--px-border); padding: 0.5rem; text-align: left; }
.muted { color: var(--px-muted); }
.legal h2 { margin-top: 2rem; }

/* SEO content pages */
.seo-page { min-height: 100vh; display: flex; flex-direction: column; }
.seo-header { position: sticky; top: 0; z-index: 10; background: var(--px-bg); border-bottom: 1px solid var(--px-border); padding: 0.75rem 1.5rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.seo-main { flex: 1; max-width: 760px; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; width: 100%; }
.seo-breadcrumbs { font-size: 0.85rem; color: var(--px-muted); margin-bottom: 1rem; display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: center; }
.seo-breadcrumbs a { color: var(--px-accent); text-decoration: none; }
.seo-article h1 { font-size: clamp(1.5rem, 4vw, 2rem); line-height: 1.2; margin: 0 0 0.5rem; }
.seo-updated { font-size: 0.85rem; color: var(--px-muted); margin: 0 0 1.25rem; }
.seo-section { margin: 2rem 0; }
.seo-section h2 { font-size: 1.15rem; margin: 0 0 0.75rem; }
.seo-section p { margin: 0 0 0.75rem; }
.seo-sources, .seo-related { padding-left: 1.25rem; }
.seo-sources a, .seo-related a { color: var(--px-accent); }
.seo-faq details { border: 1px solid var(--px-border); border-radius: 12px; padding: 0.75rem 1rem; margin-bottom: 0.5rem; background: var(--px-surface); }
.seo-faq summary { cursor: pointer; font-weight: 600; }
.seo-cta { margin: 2.5rem 0; padding: 1.25rem; border: 1px solid var(--px-border); border-radius: var(--px-radius); background: var(--px-surface); box-shadow: var(--px-shadow); }
.seo-cta-prompt { font-style: italic; color: var(--px-muted); }
.seo-footer { max-width: 760px; margin: 0 auto; padding: 0 1.25rem 2rem; color: var(--px-muted); font-size: 0.9rem; }
.seo-hub-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; margin-top: 2rem; }
.seo-hub-card { background: var(--px-surface); border: 1px solid var(--px-border); border-radius: var(--px-radius); padding: 1rem; }
.seo-hub-card h2 { font-size: 1rem; margin: 0 0 0.5rem; }
.seo-hub-card h2 a { color: inherit; text-decoration: none; }
.seo-hub-card h2 a:hover { color: var(--px-accent); }
.seo-card-link { font-size: 0.9rem; color: var(--px-accent); text-decoration: none; }
.seo-share-turn { margin: 1.5rem 0; padding-bottom: 1rem; border-bottom: 1px solid var(--px-border); }
.seo-share-q { font-size: 1rem; color: var(--px-muted); margin: 0 0 0.5rem; }
.seo-share-a { white-space: pre-wrap; line-height: 1.55; }

/* Spaces sidebar */
.px-spaces-block {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.px-spaces-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.15rem 0.2rem;
}

.px-spaces-title {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--px-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.px-spaces-add {
  width: 26px;
  height: 26px;
  border: 1px dashed var(--px-border);
  border-radius: 8px;
  background: transparent;
  color: var(--px-muted);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0;
}

.px-spaces-add:hover {
  border-color: var(--px-accent);
  color: var(--px-accent);
}

.px-spaces-add:disabled,
.px-spaces-add.px-spaces-add-disabled {
  opacity: 0.45;
  cursor: not-allowed;
  border-color: var(--px-border);
  color: var(--px-muted);
}

.px-spaces-add:disabled:hover,
.px-spaces-add.px-spaces-add-disabled:hover {
  border-color: var(--px-border);
  color: var(--px-muted);
}

.px-space-list {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  max-height: 180px;
  overflow-y: auto;
}

.px-space-row {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  border-radius: 10px;
}

.px-space-row.active {
  background: #e6f3f4;
}

.px-space-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.35rem;
  border: none;
  background: transparent;
  border-radius: 10px;
  padding: 0.45rem 0.55rem;
  font: inherit;
  text-align: left;
  cursor: pointer;
  flex: 1 1 auto;
  min-width: 0;
  color: var(--px-text);
}

.px-space-row:hover .px-space-item { background: transparent; }
.px-space-row:hover { background: #f3f2ec; }
.px-space-row.active { color: var(--px-accent); }
.px-space-row.active .px-space-item { color: inherit; }

.px-space-edit {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--px-muted);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0;
  opacity: 0;
  transition: opacity 0.12s, background 0.12s, color 0.12s;
}

.px-space-row:hover .px-space-edit,
.px-space-row.active .px-space-edit {
  opacity: 1;
}

.px-space-edit:hover {
  background: rgba(32, 128, 141, 0.12);
  color: var(--px-accent);
}

.px-space-name {
  font-size: 0.82rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.px-space-meta {
  font-size: 0.72rem;
  color: var(--px-muted);
  flex-shrink: 0;
}

.px-space-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.px-space-form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.px-modal-space {
  max-width: 420px;
}

.px-upgrade-btn {
  width: 100%;
  border: none;
  border-radius: 12px;
  padding: 0.55rem 0.75rem;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  color: white;
  background: linear-gradient(135deg, #20808d, #5b3ea8);
}

.px-upgrade-btn:hover {
  filter: brightness(1.05);
}

/* Export toolbar */
.px-export-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.35rem;
  padding-top: 0.65rem;
  border-top: 1px dashed var(--px-border);
}

.px-export-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--px-muted);
  margin-right: 0.25rem;
}

.px-export-btn {
  border: 1px solid var(--px-border);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--px-surface);
  color: var(--px-text);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.px-export-btn:hover {
  border-color: var(--px-accent);
  color: var(--px-accent);
}

.px-answer pre,
.px-answer code {
  overflow-x: auto;
  max-width: 100%;
}

/* Billing plans */
.px-plan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
}

.px-plan-card {
  border: 1px solid var(--px-border);
  border-radius: 16px;
  padding: 1rem;
  background: var(--px-bg);
}

.px-plan-card-current {
  border-color: var(--px-accent);
  box-shadow: 0 0 0 1px rgba(32, 128, 141, 0.15);
}

.px-plan-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.px-plan-price {
  margin: 0 0 0.65rem;
  font-weight: 700;
  color: var(--px-accent);
}

.px-plan-features {
  margin: 0 0 0.85rem;
  padding-left: 1.1rem;
  font-size: 0.8rem;
  color: var(--px-muted);
}

.px-plan-select:disabled {
  opacity: 0.55;
  cursor: default;
}

@media (max-width: 1024px) {
  .px-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 20;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: var(--px-shadow);
    padding-top: calc(0.75rem + var(--px-safe-top));
  }

  .px-sidebar.open { transform: translateX(0); }
  .px-sidebar-close { display: grid; place-items: center; }
  .px-sidebar-toggle { display: inline-block; }
}

@media (max-width: 768px) {
  .px-main {
    padding: 1.25rem 1rem calc(3rem + var(--px-safe-bottom));
  }

  .px-header {
    padding: calc(0.65rem + var(--px-safe-top)) 1rem 0.65rem;
  }

  .px-query {
    font-size: 1.15rem;
  }

  .px-composer-bar {
    overflow: visible;
  }

  .px-mode-trigger {
    max-width: min(140px, 32vw);
  }

  .px-sources {
    flex-direction: column;
  }

  .px-source-card {
    max-width: 100%;
  }

  .px-hints {
    padding: 0 0.25rem;
  }

  .px-hint-chip {
    font-size: 0.8rem;
  }
}

@media (max-width: 640px) {
  .px-home { padding-top: 2rem; min-height: auto; }
  .px-header { padding: 0.75rem 1rem; flex-wrap: wrap; gap: 0.5rem; }
  .px-nav-desktop { display: none; }
  .px-user-name { display: none; }
  .px-btn-ghost { padding: 0.38rem 0.7rem; font-size: 0.8rem; }
  .px-btn-primary { padding: 0.38rem 0.75rem; font-size: 0.8rem; }
  .px-mode-dropdown {
    left: 0;
    right: auto;
    min-width: min(300px, calc(100vw - 2rem));
  }

  .px-followup-wrap {
    bottom: calc(0.75rem + var(--px-safe-bottom));
  }
}

/* Phase 3 — streaming stop, favorites, turn actions */
.px-is-streaming .px-submit-btn svg {
  display: none;
}

.px-is-streaming .px-submit-btn::after {
  content: "";
  display: block;
  width: 0.75rem;
  height: 0.75rem;
  background: currentColor;
  border-radius: 2px;
}

.px-submit-btn--stop {
  background: #c0392b !important;
  border-color: #c0392b !important;
  color: #fff !important;
}

.px-model-option-wrap {
  display: flex;
  align-items: stretch;
  gap: 0;
}

.px-model-option-wrap .px-model-option {
  flex: 1;
  min-width: 0;
}

.px-model-fav {
  flex-shrink: 0;
  width: 2rem;
  border: none;
  border-left: 1px solid var(--px-border);
  background: transparent;
  color: var(--px-muted);
  cursor: pointer;
  font-size: 0.95rem;
  line-height: 1;
}

.px-model-fav:hover,
.px-model-fav.active {
  color: #d4a017;
}

.px-export-divider {
  width: 1px;
  height: 1.25rem;
  background: var(--px-border);
  margin: 0 0.15rem;
}

.px-error-muted {
  color: var(--px-muted);
  font-style: italic;
}

.px-sidebar-privacy {
  display: block;
  margin: 0.5rem 0.75rem 0.85rem;
  font-size: 0.72rem;
  color: var(--px-muted);
  text-decoration: none;
}

.px-sidebar-privacy:hover {
  color: var(--px-accent);
}

.px-settings-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.82rem;
  color: var(--px-text);
  margin: 0.35rem 0 0;
}

.px-share-page {
  min-height: 100vh;
  background: var(--px-bg, #faf9f5);
}

.px-share-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--px-border, #e5e2d9);
}

.px-share-badge {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--px-muted, #6b7280);
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--px-border, #e5e2d9);
  border-radius: 999px;
}

.px-share-main {
  max-width: 48rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

.px-share-main h1 {
  font-size: 1.35rem;
  margin: 0 0 1.25rem;
}

.px-share-thread .px-turn {
  margin-bottom: 2rem;
}

@media (max-width: 640px) {
  .px-model-menu.open .px-model-sheet-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 35;
    background: rgba(19, 52, 59, 0.35);
  }

  body.px-model-sheet-open {
    overflow: hidden;
  }

  .px-model-menu.open .px-model-dropdown {
    position: fixed;
    left: 0.75rem;
    right: 0.75rem;
    bottom: calc(0.75rem + var(--px-safe-bottom));
    width: auto;
    max-height: min(72vh, 640px);
    z-index: 45;
  }

  .px-model-trigger {
    min-width: 104px;
    max-width: min(180px, 38vw);
  }
}

/* Project hub (Perplexity Spaces-like) */
.px-space-hub {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 0.5rem 1rem 1rem;
  background: linear-gradient(180deg, #faf9f5 0%, var(--px-bg) 220px);
}

.px-space-hub-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  gap: 1.5rem;
  flex: 1;
  min-height: 0;
  max-width: 1180px;
  margin: 0 auto;
  width: 100%;
  align-items: start;
}

.px-space-hub-main {
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  background: var(--px-surface);
  border: 1px solid var(--px-border);
  border-radius: 18px;
  padding: 1rem 1.1rem 0.85rem;
  box-shadow: 0 8px 28px rgba(20, 20, 20, 0.04);
}

.px-space-hub-head {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.px-space-back {
  border: 1px solid var(--px-border);
  background: #fff;
  border-radius: 12px;
  width: 38px;
  height: 38px;
  cursor: pointer;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.px-space-hub-titles {
  flex: 1;
  min-width: 0;
}

.px-space-hub-kicker {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--px-accent);
  margin-bottom: 0.15rem;
}

.px-space-hub-name {
  font-size: 1.45rem;
  font-weight: 650;
  margin: 0 0 0.35rem;
  line-height: 1.2;
}

.px-space-hub-desc {
  margin: 0 0 0.55rem;
  font-size: 0.92rem;
  color: var(--px-text);
  line-height: 1.5;
}

.px-space-hub-desc.px-muted {
  color: var(--px-muted);
}

.px-space-hub-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.px-space-summary-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  background: #eef7f8;
  color: #1d5f68;
  font-size: 0.75rem;
  font-weight: 600;
}

.px-space-summary-chip.px-muted {
  background: #f3f2ec;
  color: var(--px-muted);
  font-weight: 500;
}

.px-space-hub-mobile-tabs {
  display: none;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
  padding: 0.2rem;
  background: #f3f2ec;
  border-radius: 12px;
}

.px-space-hub-tab {
  flex: 1;
  border: none;
  background: transparent;
  border-radius: 10px;
  padding: 0.45rem 0.65rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--px-muted);
}

.px-space-hub-tab.active {
  background: #fff;
  color: var(--px-text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.px-space-session-list {
  flex: 1;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  min-height: 140px;
  margin-bottom: 0.85rem;
}

.px-space-session-row {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  width: 100%;
  text-align: left;
  border: 1px solid var(--px-border);
  border-radius: 14px;
  padding: 0.75rem 0.85rem;
  background: #fff;
  cursor: pointer;
  font: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.px-space-session-row:hover {
  border-color: #c9e3e7;
  box-shadow: 0 4px 14px rgba(32, 128, 141, 0.08);
}

.px-space-session-icon {
  font-size: 1rem;
  line-height: 1.4;
}

.px-space-session-body {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.px-space-session-title {
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.px-space-session-sub {
  font-size: 0.78rem;
  color: var(--px-muted);
}

.px-space-empty-card {
  border: 1px dashed var(--px-border);
  border-radius: 14px;
  padding: 1.25rem;
  background: #faf9f5;
  text-align: center;
}

.px-space-empty-title {
  margin: 0 0 0.35rem;
  font-weight: 600;
}

.px-space-empty-text {
  margin: 0;
  font-size: 0.85rem;
  color: var(--px-muted);
  line-height: 1.45;
}

.px-space-hub-composer {
  margin-top: auto;
  padding-top: 0.65rem;
  border-top: 1px solid var(--px-border);
}

.px-space-composer-hint {
  font-size: 0.8rem;
  color: var(--px-muted);
  margin: 0 0 0.45rem;
}

.px-search-box--project {
  border-color: #cfe7ea;
  background: #fcfefeff;
}

.px-space-context {
  border: 1px solid var(--px-border);
  border-radius: 18px;
  background: var(--px-surface);
  padding: 1rem 1rem 1.25rem;
  overflow: auto;
  max-height: calc(100vh - 96px);
  position: sticky;
  top: 72px;
  box-shadow: 0 8px 28px rgba(20, 20, 20, 0.04);
}

.px-space-context-head {
  margin-bottom: 0.85rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--px-border);
}

.px-space-context-title {
  font-size: 1rem;
  margin: 0 0 0.35rem;
}

.px-space-context-lead {
  margin: 0;
  font-size: 0.82rem;
  color: var(--px-muted);
  line-height: 1.45;
}

.px-space-context-block {
  margin-bottom: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px dashed #ebeae4;
}

.px-space-context-block:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.px-space-context-block h3 {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--px-muted);
  margin: 0 0 0.45rem;
}

.px-space-context-block textarea,
.px-space-connector-fields input,
.px-space-connector-add select {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--px-border);
  border-radius: 10px;
  padding: 0.5rem 0.6rem;
  font: inherit;
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
  resize: vertical;
  background: #fff;
}

.px-field-compact span {
  font-size: 0.78rem;
  color: var(--px-muted);
}

.px-space-connector-help,
.px-space-connector-sync-note {
  margin: 0 0 0.55rem;
  font-size: 0.8rem;
  color: var(--px-muted);
  line-height: 1.4;
}

.px-space-files,
.px-space-connectors {
  list-style: none;
  margin: 0 0 0.55rem;
  padding: 0;
}

.px-space-file-item,
.px-space-connector-item {
  padding: 0.65rem 0;
  border-bottom: 1px dashed var(--px-border);
  font-size: 0.85rem;
}

.px-space-file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.px-space-file-del {
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--px-muted);
  font-size: 1.1rem;
}

.px-space-connector-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.px-space-connector-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
}

.px-space-connector-badge--ok {
  background: #e7f7ee;
  color: #16794c;
}

.px-space-connector-badge--error {
  background: #fdecec;
  color: #b42318;
}

.px-space-connector-badge--pending {
  background: #f3f2ec;
  color: var(--px-muted);
}

.px-space-connector-type-line {
  font-size: 0.78rem;
  color: var(--px-muted);
  margin-bottom: 0.25rem;
}

.px-space-connector-error {
  font-size: 0.78rem;
  color: #b42318;
  line-height: 1.35;
}

.px-space-connector-ok {
  font-size: 0.78rem;
  color: #16794c;
  line-height: 1.35;
}

.px-space-connector-actions {
  display: flex;
  gap: 0.35rem;
  margin-top: 0.35rem;
}

.px-space-upload {
  display: inline-block;
  cursor: pointer;
}

.px-space-empty-inline {
  color: var(--px-muted);
  font-size: 0.85rem;
  line-height: 1.45;
}

.px-space-connector-actions-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.35rem;
}

.px-space-connector-preview {
  margin: 0.5rem 0;
  padding: 0.65rem;
  border-radius: 10px;
  background: #f0faf4;
  border: 1px solid #b8e6c8;
}

.px-space-connector-preview-title {
  margin: 0 0 0.35rem;
  font-size: 0.8rem;
  font-weight: 650;
  color: #16794c;
}

.px-space-connector-preview-body {
  margin: 0;
  max-height: 140px;
  overflow: auto;
  font-size: 0.72rem;
  line-height: 1.35;
  white-space: pre-wrap;
  word-break: break-word;
  color: #334;
}

.px-space-connector-preview.hidden {
  display: none;
}

#space-add-connector:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.px-thread-project {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin: 0 0 0.75rem;
  padding: 0.45rem 0.65rem;
  border-radius: 12px;
  background: #eef7f8;
  border: 1px solid #cfe7ea;
  font-size: 0.82rem;
}

.px-thread-project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  border: none;
  background: transparent;
  font: inherit;
  font-weight: 650;
  color: #1d5f68;
  cursor: pointer;
  padding: 0;
}

.px-thread-project-sep,
.px-thread-project-hint {
  color: var(--px-muted);
}

.px-modal-space {
  max-width: 480px;
}

.px-session-space {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.72rem;
  font-weight: 600;
  color: #1d5f68;
  background: #eef7f8;
  padding: 0.1rem 0.35rem;
  border-radius: 999px;
}

@media (max-width: 900px) {
  .px-space-hub-layout {
    grid-template-columns: 1fr;
  }

  .px-space-hub-main {
    padding: 0.65rem 1rem 0.85rem;
  }

  .px-space-hub-mobile-tabs {
    display: flex;
  }

  .px-space-tabs {
    display: none;
  }

  .px-space-hub-main.px-space-panel-hidden,
  .px-space-context.px-space-panel-hidden {
    display: none !important;
  }

  .px-space-context {
    min-height: auto;
  }

  .px-space-dock {
    max-width: none;
  }
}

/* Project hub v2 — Perplexity Spaces layout overrides */
body.px-in-space .px-sidebar {
  display: none;
}

body.px-in-space .px-main {
  max-width: none;
  margin: 0;
  padding: 0;
  width: 100%;
}

body.px-in-space .px-sidebar-toggle {
  display: inline-block;
}

.px-space-hub {
  padding: 0;
  background: var(--px-bg);
}

.px-space-hub-layout {
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 0;
  max-width: none;
  margin: 0;
  min-height: calc(100dvh - 56px);
  align-items: stretch;
}

.px-space-hub-main {
  background: var(--px-bg);
  border: none;
  border-radius: 0;
  box-shadow: none;
  padding: 0.85rem 1.75rem 1rem;
}

.px-space-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.px-space-topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.px-space-back {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  width: auto;
  height: auto;
  border: none;
  background: transparent;
  padding: 0.35rem 0.5rem;
  margin-left: -0.5rem;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--px-muted);
}

.px-space-back:hover {
  color: var(--px-text);
  background: rgba(0, 0, 0, 0.04);
}

.px-space-hero {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  margin-bottom: 1rem;
  max-width: 820px;
}

.px-space-hero-icon {
  font-size: 1.75rem;
  line-height: 1;
  margin-top: 0.15rem;
}

.px-space-hero-text {
  flex: 1;
  min-width: 0;
}

.px-space-hub-name {
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  letter-spacing: -0.02em;
}

.px-space-hub-desc {
  margin: 0;
  cursor: pointer;
  border-radius: 8px;
  padding: 0.15rem 0.25rem;
  margin-left: -0.25rem;
}

.px-space-hub-desc:hover {
  background: rgba(0, 0, 0, 0.04);
}

.px-space-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
  border-bottom: 1px solid var(--px-border);
  padding-bottom: 0.35rem;
}

.px-space-tab {
  border: none;
  background: transparent;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 650;
  color: var(--px-text);
  padding: 0.35rem 0.15rem;
  cursor: default;
}

.px-space-session-list {
  display: block;
  gap: 0;
  margin-bottom: 0.5rem;
}

.px-space-session-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  border: none;
  border-bottom: 1px solid var(--px-border);
  border-radius: 0;
  padding: 0.85rem 0.35rem;
  background: transparent;
  box-shadow: none;
}

.px-space-session-row:hover {
  background: rgba(255, 255, 255, 0.65);
  border-color: var(--px-border);
  box-shadow: none;
}

.px-space-session-search-icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background: #eceae3;
  color: var(--px-muted);
}

.px-space-session-search-icon svg {
  width: 14px;
  height: 14px;
}

.px-space-session-title {
  font-weight: 500;
  font-size: 0.95rem;
}

.px-space-session-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.px-space-session-pill {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--px-muted);
  background: #eceae3;
  border-radius: 999px;
  padding: 0.12rem 0.45rem;
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.px-space-session-meta {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-shrink: 0;
}

.px-space-session-time {
  font-size: 0.78rem;
  color: var(--px-muted);
  white-space: nowrap;
}

.px-space-empty-card {
  border: none;
  background: transparent;
  padding: 2.5rem 1rem;
}

.px-space-dock {
  flex-shrink: 0;
  padding-top: 0.65rem;
  max-width: 760px;
  width: 100%;
}

.px-search-box--project {
  border-color: var(--px-border);
  background: var(--px-surface);
  box-shadow: var(--px-shadow);
}

.px-space-context {
  border: none;
  border-left: 1px solid var(--px-border);
  border-radius: 0;
  background: #f3f2ec;
  max-height: none;
  position: static;
  box-shadow: none;
  padding: 1rem 1rem 1.5rem;
}

.px-space-side-section {
  padding: 0.85rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.px-space-side-section:last-child {
  border-bottom: none;
}

.px-space-side-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.45rem;
}

.px-space-side-head h3 {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 650;
  text-transform: none;
  letter-spacing: normal;
  color: var(--px-text);
}

.px-space-side-add {
  border: none;
  background: transparent;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--px-muted);
  cursor: pointer;
  padding: 0.2rem 0.35rem;
  border-radius: 8px;
}

.px-space-side-add--label {
  display: inline-block;
  cursor: pointer;
}

.px-space-side-add:hover {
  color: var(--px-accent);
  background: rgba(32, 128, 141, 0.08);
}

.px-space-side-preview {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--px-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.px-space-side-section.is-filled .px-space-side-preview {
  color: var(--px-text);
}

.px-space-side-section.is-editing .px-space-side-preview {
  display: none;
}

.px-space-side-editor {
  display: none;
}

.px-space-side-section.is-editing .px-space-side-editor,
.px-space-side-section--connectors.is-editing .px-space-connector-add {
  display: block;
}

.px-space-side-section.is-editing .px-space-side-add[data-open="connectors"],
.px-space-side-section--connectors.is-editing .px-space-side-add {
  color: var(--px-accent);
}

.px-space-side-section--connectors.is-editing #space-connector-form {
  display: block !important;
}

.px-space-tab {
  border: none;
  background: transparent;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 650;
  color: var(--px-muted);
  padding: 0.35rem 0.15rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.px-space-tab.active {
  color: var(--px-text);
  border-bottom-color: var(--px-accent);
}

.px-space-memory {
  flex: 1;
  min-height: 200px;
  max-width: 820px;
}

.px-space-memory-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  margin-bottom: 0.65rem;
}

.px-space-memory-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
}

.px-space-memory-actions {
  display: flex;
  gap: 0.35rem;
}

.px-space-memory-lead {
  margin: 0 0 0.65rem;
  font-size: 0.85rem;
  color: var(--px-muted);
  line-height: 1.45;
}

.px-space-memory-input {
  width: 100%;
  box-sizing: border-box;
  font: inherit;
  font-size: 0.92rem;
  line-height: 1.5;
  border: 1px solid var(--px-border);
  border-radius: 14px;
  padding: 0.85rem 1rem;
  resize: vertical;
  min-height: 220px;
  background: var(--px-surface);
}

.px-space-memory-meta {
  margin: 0.55rem 0 0;
  font-size: 0.78rem;
  color: var(--px-muted);
}

.px-space-connector-add.hidden {
  display: none !important;
}