/* Existing homepage, refined in place. Every rule is scoped to the optional
   presentation module so unloading it restores the original visual baseline. */
body[data-ui-polish] {
  --ui-radius-control: 9px;
  --ui-radius-panel: 16px;
  --ui-radius-composer: 23px;
  --ui-ease: cubic-bezier(.2,.72,.25,1);
  --ui-shadow: 0 10px 32px color-mix(in srgb, var(--yf-primary) 7%, transparent), 0 1px 3px color-mix(in srgb, var(--yf-text) 4%, transparent);
  color: var(--yf-text);
  font-variant-numeric: tabular-nums;
}
body[data-ui-polish] :is(button, input, textarea, select) { -webkit-tap-highlight-color: transparent; }
body[data-ui-polish] :is(button, a, summary, input, textarea, select):focus-visible {
  outline: 2px solid color-mix(in srgb, var(--yf-primary) 65%, var(--yf-surface));
  outline-offset: 3px;
}
body[data-ui-polish] :is(button, .route-cta, .primary-nav a) {
  transition: color .16s ease, background-color .16s ease, border-color .16s ease, box-shadow .18s ease, transform .18s var(--ui-ease);
}
body[data-ui-polish] button:not(:disabled):active { transform: translateY(1px); }
body[data-ui-polish] button:disabled { cursor: default; }
body[data-ui-polish] .topbar { border-right-color: color-mix(in srgb, var(--yf-border) 78%, transparent); }
body[data-ui-polish] .primary-nav { gap: 5px; scrollbar-width: thin; scrollbar-color: var(--yf-border) transparent; }
body[data-ui-polish] .primary-nav > a {
  min-height: 42px; padding: 11px 14px; border-radius: 11px;
  font-size: 13px; line-height: 1.5; letter-spacing: .015em;
}
body[data-ui-polish] .primary-nav > a:not(.is-active):hover {
  background: color-mix(in srgb, var(--yf-primary) 5%, var(--yf-surface)); color: var(--yf-text);
  border-left-color: transparent;
}
body[data-ui-polish] .primary-nav > a.is-active {
  background: color-mix(in srgb, var(--yf-primary) 8%, var(--yf-surface));
  box-shadow: inset 2px 0 var(--yf-primary); color: var(--yf-primary);
}
body[data-ui-polish] .account-nav { gap: 9px; }
body[data-ui-polish] :is(.theme-toggle, .login-btn, .user-menu-button, #loginBtn) {
  min-height: 36px; border-radius: 11px;
}
body[data-ui-polish] .usage-label { font-size: 11px; line-height: 1.6; color: var(--yf-muted); }
body[data-ui-polish] .conversation-actions { padding-top: 17px; }
body[data-ui-polish] .conversation-action { min-height: 35px; border-radius: 9px; font-size: 12px; }
body[data-ui-polish] .sidebar-resizer::after { height: 42px; width: 2px; }
body[data-ui-polish] .sidebar-collapse-button { min-height: 44px; }
body[data-ui-polish] .hero-copy h1 {
  font-size: clamp(25px, 2.6vw, 34px); font-weight: 500;
  letter-spacing: -.035em; line-height: 1.4; text-wrap: balance;
}
body[data-ui-polish] .hero-stage { isolation: isolate; }
body[data-ui-polish] .composer {
  border-radius: var(--ui-radius-composer);
  border-color: color-mix(in srgb, var(--yf-border) 84%, transparent);
  background: var(--yf-surface-fill, var(--yf-surface));
  box-shadow: var(--ui-shadow);
  transition: border-color .18s ease, box-shadow .2s ease, background-color .2s ease;
}
body[data-ui-polish] .composer:focus-within {
  border-color: color-mix(in srgb, var(--yf-primary) 38%, var(--yf-border));
  box-shadow: var(--ui-shadow), 0 0 0 3px color-mix(in srgb, var(--yf-primary) 4%, transparent);
}
body[data-ui-polish] .assistant-input { color: var(--yf-text); font-size: 16px; line-height: 1.65; caret-color: var(--yf-primary); }
body[data-ui-polish] .assistant-input::placeholder { color: color-mix(in srgb, var(--yf-muted) 78%, var(--yf-surface)); }
body[data-ui-polish] .assistant-input:focus { outline: none; }
body[data-ui-polish] .composer-tools { border-color: color-mix(in srgb, var(--yf-border) 72%, transparent); }
body[data-ui-polish] :is(.chat-action, #chatActionBtn, .primary-action, .theme-save-button, .auth-submit, .route-cta) {
  border-radius: var(--ui-radius-control);
  background: var(--yf-primary-fill, var(--yf-primary));
  color: var(--yf-on-primary, #fff);
}
body[data-ui-polish] :is(.chat-action, #chatActionBtn, .theme-save-button):not(:disabled):hover {
  box-shadow: 0 4px 13px color-mix(in srgb, var(--yf-primary) 19%, transparent);
}
body[data-ui-polish] :is(.chat-action, #chatActionBtn):disabled { opacity: .43; }
body[data-ui-polish] :is(.upload-more-btn, .model-picker-button, #uploadMoreBtn, #chatModelBtn) { border-radius: 8px; }
body[data-ui-polish] :is(.upload-more-btn, #uploadMoreBtn):hover { background: var(--yf-primary-soft); }
body[data-ui-polish] :is(.upload-menu, .model-menu, .user-menu, .access-menu-panel) {
  border-radius: 13px; border-color: var(--yf-border); background: var(--yf-surface);
  box-shadow: 0 12px 36px color-mix(in srgb, var(--yf-primary) 13%, transparent);
}
body[data-ui-polish] :is(.upload-menu, .model-menu, .user-menu, .access-menu-panel):not([hidden]) {
  animation: yf-ui-menu-in .16s var(--ui-ease) both;
}
@keyframes yf-ui-menu-in { from { opacity: .35; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }
body[data-ui-polish] :is(.attachment-preview, .uploaded-file, .pdf-upload-preview, .pdf-page-card) {
  border-radius: 12px; border-color: var(--yf-border); background: var(--yf-surface);
}
body[data-ui-polish] :is(.chat-area, .theme-panel, .crm-history-list) {
  scrollbar-width: thin; scrollbar-color: var(--yf-border) transparent;
}
body[data-ui-polish] .chat-turn { gap: 15px; margin-bottom: 30px; }
body[data-ui-polish] .chat-message { border-color: var(--yf-border); border-radius: 17px; padding: 16px 20px; box-shadow: none; }
body[data-ui-polish] .chat-message-user {
  border-radius: 17px 17px 5px 17px;
  background: color-mix(in srgb, var(--yf-primary) 6%, var(--yf-surface));
}
body[data-ui-polish] .chat-message-assistant {
  background: var(--yf-surface); border-radius: 5px 17px 17px 17px;
}
body[data-ui-polish] .chat-message-body { font-size: 15px; line-height: 1.85; overflow-wrap: anywhere; }
body[data-ui-polish] .chat-message-body > :first-child { margin-top: 0; }
body[data-ui-polish] .chat-message-body > :last-child { margin-bottom: 0; }
body[data-ui-polish] .chat-message-label { color: var(--yf-muted); font-size: 11px; line-height: 1.5; margin-bottom: 8px; }
body[data-ui-polish] .chat-message-body :is(p, ul, ol) { margin-block: 10px; }
body[data-ui-polish] .chat-message-body :is(h2,h3,h4) { color: var(--yf-text); margin-block: 20px 9px; line-height: 1.5; }
body[data-ui-polish] .chat-message-body :is(.katex-display, mjx-container[display="true"]) { margin-block: 16px; padding-block: 3px; }
body[data-ui-polish] .chat-message-body :is(table, .answer-table) { border-color: var(--yf-border); font-size: 14px; }
body[data-ui-polish] .chat-message-body :is(th,td) { padding: 10px 13px; border-color: var(--yf-border); line-height: 1.65; }
body[data-ui-polish] .chat-message-body th { background: var(--yf-primary-soft); font-weight: 600; }
body[data-ui-polish] :is(.composer-status, .chat-wait-label, .chat-wait-detail) { font-size: 12px; line-height: 1.6; }
body[data-ui-polish] :is(.composer-status.is-error, .theme-status.is-error) { color: var(--yf-danger, var(--danger)); }
body[data-ui-polish] :is(.composer-status.is-success, .theme-status.is-success) { color: var(--yf-success, var(--success)); }
body[data-ui-polish] :is(.crm-history-item, .history-card, .route-panel, .assess-grid article) { border-radius: var(--ui-radius-panel); }
body[data-ui-polish] .crm-history-item { padding: 10px 12px; font-size: 12px; line-height: 1.6; border-color: var(--yf-border); background: var(--yf-surface); }
body[data-ui-polish] .crm-history-item[aria-current="true"] { background: var(--yf-primary-soft); border-color: color-mix(in srgb, var(--yf-primary) 48%, var(--yf-border)); }
body[data-ui-polish] :is(.route-heading > p:last-child, .route-panel p, .route-footnote) { line-height: 1.8; }
body[data-ui-polish] :is(.route-panel, .assess-grid article) { background: var(--yf-surface); border-color: var(--yf-border); }
body[data-ui-polish] :is(.route-panel input, .route-panel select, .parent-bind-row input) { border-radius: 9px; min-height: 40px; }
body[data-ui-polish] .route-content { border-top-color: transparent; }
body[data-ui-polish] .route-heading h2 { text-wrap: balance; line-height: 1.3; }
body[data-ui-polish] .route-heading > p:last-child { max-width: 44em; }
body[data-ui-polish] .footer { border-top-color: var(--yf-border); }
body[data-ui-polish] .footer :is(a,summary) { text-underline-offset: 4px; }
body[data-ui-polish] .auth-dialog { background: var(--yf-surface); color: var(--yf-text); border-color: var(--yf-border); border-radius: 20px; box-shadow: var(--ui-shadow); }
body[data-ui-polish] .auth-form input { background: var(--yf-surface); color: var(--yf-text); border-color: var(--yf-border); }
body[data-ui-polish].route-mode main > [data-route-view].is-route-entering { animation-duration: .2s; }
body[data-ui-polish].is-conversation-mode .hero-stage.is-chat-active .composer.is-conversation-composer {
  animation: none; border-radius: 18px; background: var(--yf-surface);
  /* Conversation input stays in the flex flow, clear of saved-state controls.
     The landing page's cat alignment used a -20px translation. */
  position: relative; bottom: auto; transform: none;
}
body[data-ui-polish].route-mode.is-conversation-mode main > #home.hero {
  min-height: 0 !important; height: 100dvh; padding: 24px 26px 20px;
}
body[data-ui-polish].is-conversation-mode .hero-stage { gap: 0; min-height: 0; }
body[data-ui-polish].is-conversation-mode .chat-area { padding-bottom: 34px; }
body[data-ui-polish].is-conversation-mode .chat-area > .crm-history-current-notice {
  min-width: 0; min-height: min-content; height: max-content;
  max-height: none; overflow: visible;
}
/* The actual companion remains attached to the existing stage. It is
   decorative while docked, leaving all interaction to the real input. */
body[data-ui-polish][data-companion-visual="line"].is-conversation-mode .hero-stage > .companion {
  display: block !important; position: absolute; left: var(--yf-ui-cat-x, 76%); top: var(--yf-ui-cat-y, 75%) !important;
  right: auto; bottom: auto; width: 68px !important; height: 34px !important; min-height: 0; margin: 0;
  transform: none; overflow: hidden; pointer-events: none; z-index: 1;
}
body[data-ui-polish][data-companion-visual="line"].is-conversation-mode .companion :is(.companion-copy,.companion-bubble,.companion-prop-layer) { display: none !important; }
body[data-ui-polish][data-companion-visual="line"].is-conversation-mode .hero-stage > .companion .companion-portrait { width: 68px !important; height: 49px !important; min-height: 0; pointer-events: none; }
body[data-ui-polish][data-companion-visual="line"].is-conversation-mode .hero-stage > .companion .companion-line-face { width: 68px !important; height: 49px !important; }
body[data-ui-polish][data-companion-visual="line"].is-conversation-mode .hero-stage > .companion .companion-line-face svg { width: 68px !important; height: 49px !important; animation: none !important; }
body[data-ui-polish].yf-ui-opening .composer { z-index: 3; }
.yf-ui-title-exit { z-index: 18; overflow: visible; }
body[data-ui-polish] .yf-ui-title-exit .hero-copy { display: block !important; position: static !important; margin: 0 !important; padding: 0 !important; width: 100% !important; }
.yf-ui-cat-drop-slot { overflow: hidden; z-index: 17; }
body[data-ui-polish][data-companion-visual="line"] .yf-ui-cat-drop-slot .companion-portrait { position: relative; inset: auto; width: 100%; height: 100%; pointer-events: none; }
body[data-ui-polish] .yf-ui-cat-drop-slot .companion-prop-layer { display: none !important; }
body[data-ui-polish] .yf-ui-cat-drop-slot .companion-line-face { width: 100%; height: 100%; }
body[data-ui-polish] .yf-ui-cat-drop-slot .companion-line-face svg { width: 100%; height: 100%; animation: none !important; }
/* Wardrobe: compact sections, a live miniature and an explicit local-strength
   label; the existing account-private save API remains authoritative. */
body[data-ui-polish] .theme-panel {
  width: 400px; max-height: calc(100dvh - 40px); top: 20px; bottom: auto;
  padding: 19px; border-radius: 20px; border-color: var(--yf-border);
  background: var(--yf-surface); box-shadow: 0 18px 64px color-mix(in srgb, var(--yf-primary) 15%, transparent);
}
body[data-ui-polish] .theme-panel :is(button,input,select,summary):focus-visible { outline-offset: 2px; }
body[data-ui-polish] .theme-panel-head { padding-bottom: 14px; }
body[data-ui-polish] .theme-panel-head strong { font-size: 15px; }
body[data-ui-polish] .theme-panel-head p { font-size: 11px; line-height: 1.6; }
body[data-ui-polish] .theme-section { margin-top: 16px; padding-top: 15px; border-color: var(--yf-border); }
body[data-ui-polish] .theme-section-head strong { font-size: 12px; }
body[data-ui-polish] .theme-section-head > span { color: var(--yf-muted); font-size: 10px; }
body[data-ui-polish] .theme-preset-grid { gap: 7px; }
body[data-ui-polish] .theme-preset { min-height: 63px; padding: 7px; border-radius: 11px; border-color: var(--yf-border); }
body[data-ui-polish] .theme-preset.is-active { outline: none; border-color: var(--yf-primary); background: var(--yf-primary-soft); box-shadow: 0 0 0 2px color-mix(in srgb, var(--yf-primary) 8%, transparent); }
body[data-ui-polish] .theme-swatch { border-radius: 6px; overflow: hidden; }
body[data-ui-polish] .theme-material-grid { gap: 7px; }
body[data-ui-polish] .theme-material { border-radius: 11px; padding: 8px; border-color: var(--yf-border); }
body[data-ui-polish] .theme-material-swatch { background: var(--theme-swatch-fill, var(--yf-surface)); border: 1px solid color-mix(in srgb, var(--yf-border) 60%, transparent); box-shadow: inset 0 1px rgba(255,255,255,.18); }
body[data-ui-polish] .theme-material-copy strong { font-size: 11px; }
body[data-ui-polish] .theme-material-copy small { font-size: 10px; line-height: 1.5; }
body[data-ui-polish] .theme-strength-row { display: grid; grid-template-columns: auto minmax(60px,1fr) 35px; gap: 12px; align-items: center; margin-top: 13px; font-size: 11px; }
body[data-ui-polish] .theme-strength-input { width: 100%; accent-color: var(--yf-primary); min-height: 28px; cursor: pointer; }
body[data-ui-polish] .theme-strength-output { text-align: right; color: var(--yf-muted); font-size: 11px; }
body[data-ui-polish] .theme-color-row { min-height: 41px; padding-block: 7px; }
body[data-ui-polish] .theme-color-row label { font-size: 12px; }
body[data-ui-polish] .theme-color-input { width: 38px; height: 30px; border-radius: 7px; }
body[data-ui-polish] .theme-hint { font-size: 11px; line-height: 1.65; }
body[data-ui-polish] .theme-contrast { font-size: 11px; line-height: 1.65; }
body[data-ui-polish] .theme-live-preview {
  display: grid; grid-template-columns: 59px 1fr; gap: 0; min-height: 125px;
  margin-top: 10px; overflow: hidden; border: 1px solid var(--preview-line); border-radius: 12px;
  background: var(--preview-page); color: var(--preview-ink); pointer-events: none;
}
body[data-ui-polish] .theme-preview-nav { display: flex; flex-direction: column; gap: 11px; padding: 14px 8px; border-right: 1px solid var(--preview-line); background: var(--preview-surface); font-size: 10px; font-weight: 600; }
body[data-ui-polish] .theme-preview-nav span { padding: 3px; border-radius: 4px; font-size: 9px; font-weight: 400; }
body[data-ui-polish] .theme-preview-nav-current { background: var(--preview-primary); color: var(--preview-on-primary); }
body[data-ui-polish] .theme-preview-main { padding: 15px 13px; }
body[data-ui-polish] .theme-preview-main > strong { display: block; font-size: 12px; font-weight: 550; }
body[data-ui-polish] .theme-preview-answer { margin: 10px 0; padding: 8px; border-radius: 6px; background: var(--preview-surface); font-size: 10px; line-height: 1.6; }
body[data-ui-polish] .theme-preview-action { display: inline-block; padding: 5px 9px; border-radius: 5px; background: var(--preview-primary); color: var(--preview-on-primary); font-size: 9px; }
body[data-ui-polish] .theme-undo { min-height: 32px; margin-top: 9px; padding: 0 10px; border: 1px solid var(--yf-border); border-radius: 8px; background: transparent; color: var(--yf-muted); font-size: 11px; }
body[data-ui-polish] .theme-undo:hover { color: var(--yf-primary); border-color: var(--yf-primary); }
body[data-ui-polish] .theme-save-section { margin-inline: -19px; padding: 14px 19px 16px; background: var(--yf-surface); box-shadow: 0 -6px 16px color-mix(in srgb, var(--yf-surface) 90%, transparent); }
body[data-ui-polish] .theme-name-input { min-height: 36px; border-radius: 9px; font-size: 12px; }
body[data-ui-polish] .theme-save-button { min-height: 36px; padding-inline: 14px; }
@media (min-width:721px) {
  body[data-ui-polish].route-mode:not(.is-conversation-mode) main > #home.hero {
    min-height: 100dvh; padding-top: clamp(116px, 22dvh, 190px); padding-bottom: 80px;
  }
  body[data-ui-polish] .page-shell { transition-duration: .22s; }
  body[data-ui-polish] .topbar { transition-duration: .22s, .2s, .18s, .18s; }
  body[data-ui-polish] .sidebar-resizer, body[data-ui-polish] .sidebar-collapse-button { transition-duration: .22s; }
}
@media (max-width:720px) {
  body[data-ui-polish] .primary-nav > a { min-height: 44px; }
  body[data-ui-polish] .hero-copy h1 { font-size: clamp(24px, 6vw, 29px); }
  body[data-ui-polish] .composer { border-radius: 19px; }
  body[data-ui-polish] .assistant-input { font-size: 16px; }
  body[data-ui-polish] :is(#chatActionBtn, #uploadMoreBtn, #chatModelBtn) { min-height: 40px; }
  body[data-ui-polish].route-mode.is-conversation-mode main > #home.hero { height: calc(100dvh - 68px); padding: 12px 14px max(12px,env(safe-area-inset-bottom)); }
  body[data-ui-polish] .chat-message { padding: 14px 15px; border-radius: 15px; max-width: 98%; }
  body[data-ui-polish] .chat-message-body { font-size: 15px; line-height: 1.8; }
  body[data-ui-polish] .theme-panel { left: 12px; right: 12px; top: 80px; width: auto; max-height: calc(100dvh - 94px); border-radius: 18px; }
  body[data-ui-polish] .theme-panel :is(button,input,select) { min-height: 34px; }
  body[data-ui-polish] .theme-preset-grid { grid-template-columns: repeat(4,minmax(0,1fr)); }
  body[data-ui-polish] .theme-material-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
  body[data-ui-polish] .route-content { padding-inline: 20px; }
}
@media (prefers-reduced-motion:reduce) {
  body[data-ui-polish] *, body[data-ui-polish] *::before, body[data-ui-polish] *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

body[data-ui-polish] .theme-custom-section > summary { cursor: pointer; list-style: none; min-height: 32px; }
body[data-ui-polish] .theme-custom-section > summary::-webkit-details-marker { display: none; }
body[data-ui-polish] .theme-custom-section > summary::after { content: "+"; margin-left: auto; color: var(--yf-muted); font-size: 16px; }
body[data-ui-polish] .theme-custom-section[open] > summary::after { content: "−"; }

body[data-ui-polish] .hero-brand-line strong { color: var(--yf-primary); }
body[data-ui-polish] .hero-brand-sub { color: var(--yf-muted); }
body[data-ui-polish][data-companion-visual="line"] :is(.line-face-cat-outline,.line-face-cat-inner-ear,.line-face-cat-whisker,.line-face-cat-nose,.line-face-expression,.line-face-ear-tip) { stroke: var(--yf-primary) !important; }
body[data-ui-polish][data-companion-visual="line"] .line-face-eye { fill: var(--yf-primary) !important; }
body[data-ui-polish] .companion-bubble { background: var(--yf-surface); color: var(--yf-text); border-color: var(--yf-border); }
body[data-ui-polish] .companion-bubble::after { background: var(--yf-surface); border-color: var(--yf-border); }

body[data-ui-polish] .chat-message-body .yf-ui-answer-heading { margin: 18px 0 9px; font-size: 16px; line-height: 1.5; font-weight: 600; color: var(--yf-text); }
@media (max-width:720px) {
  body[data-ui-polish] .composer-tools { gap: 8px; align-items: center; }
  body[data-ui-polish] .composer-tools .attach-wrap { flex: 1 1 64px; min-width: 44px; max-width: 100%; }
  body[data-ui-polish] #chatActionBtn { gap: 10px; min-width: 112px; white-space: nowrap; padding-inline: 14px; }
  body[data-ui-polish] #chatActionBtn .btn-label { white-space: nowrap; flex-shrink: 0; }
  body[data-ui-polish] #exitChatBtn { min-height: 40px; border-radius: 9px; white-space: nowrap; }
}
/* Let the table/formula own horizontal scrolling; grid min-content must not
   widen the entire conversation, particularly beside a mobile scrollbar. */
body[data-ui-polish] .chat-area { min-width: 0; }
body[data-ui-polish] .chat-turn { width: 100%; min-width: 0; grid-template-columns: minmax(0,1fr); }
body[data-ui-polish] .chat-message { min-width: 0; box-sizing: border-box; }
body[data-ui-polish] .chat-message-body { min-width: 0; max-width: 100%; }
@media (max-width:720px) {
  body[data-ui-polish].route-mode.is-conversation-mode main > #home.hero {
    height: 100dvh; padding-top: 80px;
  }
}

body[data-ui-polish] .crm-pdf-panel { border-radius: 13px; border-color: var(--yf-border); background: var(--yf-surface); color: var(--yf-text); }
body[data-ui-polish] .crm-pdf-page { border-radius: 10px; border-color: var(--yf-border); background: var(--yf-surface); color: var(--yf-text); }
body[data-ui-polish] .crm-pdf-page[aria-pressed="true"] { border-color: var(--yf-primary); background: var(--yf-primary-soft); }
body[data-ui-polish] .crm-pdf-page img { border-radius: 5px; background: #fff; }
body[data-ui-polish] .chat-selection-candidates { display: grid; grid-template-columns: repeat(auto-fit,minmax(min(100%,180px),1fr)); gap: 9px; }
body[data-ui-polish] .chat-selection-candidate { min-height: 48px; padding: 13px 15px; border: 1px solid var(--yf-border); border-radius: 12px; background: var(--yf-surface); color: var(--yf-text); text-align: left; }
body[data-ui-polish] .chat-selection-candidate:hover { border-color: var(--yf-primary); background: var(--yf-primary-soft); }
body[data-ui-polish] .chat-selection-candidate-label { font-size: 13px; font-weight: 600; line-height: 1.5; }
body[data-ui-polish] .chat-selection-candidate-preview { display: block; margin-top: 5px; font-size: 12px; line-height: 1.65; color: var(--yf-muted); }
@media (max-width:720px) {
  body[data-ui-polish] .composer-tools .attach-wrap:has(.crm-pdf-panel:not([hidden])),
  body[data-ui-polish] .composer-tools .attach-wrap:has(.attachment-chips:not(:empty)) { flex-basis: 100%; }
}

/* V2 reading palettes: neutral space, small color accents, useful previews. */
body[data-ui-polish] {
  --ui-shadow: 0 9px 28px color-mix(in srgb, var(--yf-text) 4%, transparent), 0 1px 2px color-mix(in srgb, var(--yf-text) 3%, transparent);
}
body[data-ui-polish] .topbar { border-right-color: color-mix(in srgb, var(--yf-border) 65%, transparent); }
body[data-ui-polish] .primary-nav > a.is-active { background: color-mix(in srgb, var(--yf-primary) 7%, var(--yf-sidebar-fill)); box-shadow: inset 2px 0 color-mix(in srgb, var(--yf-primary) 80%, var(--yf-sidebar-fill)); }
body[data-ui-polish] .composer:focus-within { box-shadow: var(--ui-shadow), 0 0 0 2px color-mix(in srgb, var(--yf-primary) 4%, transparent); }
body[data-ui-polish] .chat-message-assistant { background: var(--yf-surface); border-color: color-mix(in srgb, var(--yf-border) 72%, transparent); }
body[data-ui-polish] .chat-message-user { background: color-mix(in srgb, var(--yf-primary) 4%, var(--yf-surface)); }
body[data-ui-polish] .chat-message-body th { background: color-mix(in srgb, var(--yf-page-bg) 72%, var(--yf-surface)); }
body[data-ui-polish] .theme-panel { width: 420px; padding: 20px; box-shadow: 0 16px 56px color-mix(in srgb, var(--yf-text) 12%, transparent); }
body[data-ui-polish] .theme-panel-head { align-items: flex-start; padding-bottom: 16px; }
body[data-ui-polish] .theme-panel-head strong { font-size: 17px; font-weight: 600; letter-spacing: -.02em; }
body[data-ui-polish] .theme-panel-head small { display: block; max-width: 295px; margin-top: 6px; color: var(--yf-muted); font-size: 11px; line-height: 1.65; }
body[data-ui-polish] .theme-section { margin-top: 14px; padding-top: 14px; }
body[data-ui-polish] .theme-section-head { gap: 8px; }
body[data-ui-polish] .theme-live-preview { min-height: 165px; grid-template-columns: 55px minmax(0,1fr); border-color: color-mix(in srgb, var(--preview-line) 65%, transparent); }
body[data-ui-polish] .theme-preview-nav { padding: 14px 8px; gap: 13px; border-right-color: color-mix(in srgb, var(--preview-line) 65%, transparent); background: var(--preview-sidebar); }
body[data-ui-polish] .theme-preview-nav-current { background: color-mix(in srgb, var(--preview-primary) 10%, var(--preview-sidebar)); color: var(--preview-ink); border-left: 2px solid var(--preview-primary); }
body[data-ui-polish] .theme-preview-main { padding: 14px; }
body[data-ui-polish] .theme-preview-question { margin: 0 0 10px; text-align: right; font-size: 10px; color: var(--preview-muted); }
body[data-ui-polish] .theme-preview-answer { margin: 0 0 10px; padding: 10px 12px; border: 1px solid color-mix(in srgb, var(--preview-line) 60%, transparent); border-radius: 8px; }
body[data-ui-polish] .theme-preview-answer strong { font-size: 10px; font-weight: 600; }
body[data-ui-polish] .theme-preview-answer p { margin: 5px 0 6px; font-size: 10px; line-height: 1.65; }
body[data-ui-polish] .theme-preview-formula { display: block; text-align: center; font: italic 16px/1.5 Georgia,serif; }
body[data-ui-polish] .theme-preview-action { padding: 4px 9px; }
body[data-ui-polish] .theme-reading-grid { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 9px; margin-top: 11px; }
body[data-ui-polish] .theme-reading-preset { position: relative; display: block; min-width: 0; min-height: 118px; padding: 6px; text-align: left; background: transparent; border: 1px solid var(--yf-border); box-shadow: none; }
body[data-ui-polish] .theme-reading-preset.is-active { background: transparent; border-color: color-mix(in srgb, var(--yf-primary) 75%, var(--yf-border)); box-shadow: 0 0 0 1px color-mix(in srgb, var(--yf-primary) 16%, transparent); }
body[data-ui-polish] .theme-reading-preset.is-active::after { content: '✓'; position: absolute; right: 9px; bottom: 25px; color: var(--yf-primary); font-size: 12px; }
body[data-ui-polish] .theme-reading-preset .theme-preset-scene { display: grid; grid-template-columns: 18% minmax(0,1fr); height: 58px; margin: 0 0 8px; padding: 0; border-radius: 6px; background: var(--scene-page); border: 1px solid var(--scene-line); overflow: hidden; }
body[data-ui-polish] .theme-scene-rail { display: flex; flex-direction: column; gap: 6px; padding: 10px 3px; background: color-mix(in srgb, var(--scene-page) 72%, var(--scene-surface)); border-right: 1px solid var(--scene-line); }
body[data-ui-polish] .theme-scene-rail i { display: block; height: 2px; background: var(--scene-ink); opacity: .28; }
body[data-ui-polish] .theme-scene-rail i:first-child { height: 4px; background: var(--scene-primary); opacity: .8; }
body[data-ui-polish] .theme-scene-sheet { display: block; align-self: center; margin: 7px; padding: 7px; border-radius: 3px; background: var(--scene-surface); border: 1px solid var(--scene-line); }
body[data-ui-polish] .theme-scene-sheet i { display: block; width: 80%; height: 2px; background: var(--scene-ink); opacity: .25; margin-bottom: 4px; }
body[data-ui-polish] .theme-scene-sheet i:nth-child(2) { width: 55%; }
body[data-ui-polish] .theme-scene-sheet b { display: block; color: var(--scene-ink); text-align: center; font: italic 9px Georgia,serif; }
body[data-ui-polish] .theme-reading-preset .theme-preset-name { display: block; margin: 0 0 4px; color: var(--yf-text); font-size: 12px; line-height: 1.3; font-weight: 550; }
body[data-ui-polish] .theme-preset-caption { display: block; color: var(--yf-muted); font-size: 9px; line-height: 1.5; white-space: normal; }
body[data-ui-polish] :is(.theme-more-section,.theme-material-section,.theme-custom-section) > summary { display: flex; align-items: center; min-height: 32px; list-style: none; cursor: pointer; }
body[data-ui-polish] :is(.theme-more-section,.theme-material-section,.theme-custom-section) > summary::-webkit-details-marker { display: none; }
body[data-ui-polish] :is(.theme-more-section,.theme-material-section,.theme-custom-section) > summary > span { margin-left: auto; }
body[data-ui-polish] :is(.theme-more-section,.theme-material-section,.theme-custom-section) > summary::after { content: '+'; flex: 0 0 auto; margin-left: 4px; color: var(--yf-muted); font-size: 15px; font-weight: 400; }
body[data-ui-polish] :is(.theme-more-section,.theme-material-section,.theme-custom-section)[open] > summary::after { content: '−'; }
body[data-ui-polish] :is(.theme-more-section,.theme-material-section,.theme-custom-section)[open] > summary { margin-bottom: 12px; }
body[data-ui-polish] .theme-save-section { margin-inline: -20px; padding-inline: 20px; }
body[data-ui-polish][data-theme-logo-contrast="plate"] .wordmark { padding: 0; background: transparent; box-shadow: none; }
body[data-ui-polish][data-theme-logo-contrast="plate"] .wordmark-logo { filter: grayscale(1) brightness(0) invert(.88); }
@media(max-width:720px) {
  body[data-ui-polish] .theme-panel { left: 12px; right: 12px; width: auto; padding: 17px; }
  body[data-ui-polish] .theme-reading-grid { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 6px; }
  body[data-ui-polish] .theme-reading-preset { min-height: 116px; padding: 5px; }
  body[data-ui-polish] .theme-reading-preset .theme-preset-scene { height: 53px; }
  body[data-ui-polish] .theme-preset-caption { font-size: 9px; }
  body[data-ui-polish] .theme-save-section { margin-inline: -17px; padding-inline: 17px; }
}

/* Conversation reading owns its whole area. The landing companion must not
   float over answers or saved-history controls, including read-only records. */
body[data-ui-polish][data-companion-visual="line"].is-conversation-mode .hero-stage.is-chat-active > .companion {
  display: none !important;
}