:root{
  --bg:#07111f;
  --bg2:#0a1526;
  --panel:rgba(14,22,38,.84);
  --panel2:rgba(10,16,28,.74);
  --card:rgba(255,255,255,.055);
  --card2:rgba(255,255,255,.035);
  --stroke:rgba(255,255,255,.10);
  --stroke2:rgba(255,255,255,.06);
  --text:#ecf3ff;
  --muted:#aebbd7;
  --soft:#7f91b2;
  --blue:#6ea8ff;
  --blue2:#4f87ff;
  --purple:#b982ff;
  --pink:#ff8fca;
  --green:#56f0a9;
  --yellow:#ffd76a;
  --danger:#ff6d85;
  --shadow:0 18px 50px rgba(0,0,0,.35);
  --shadow-soft:0 10px 26px rgba(0,0,0,.22);
  --radius:22px;
  --radius-sm:16px;
  --radius-xs:12px;
  --sidebar-w:260px;
}

*{ box-sizing:border-box; }

html, body{
  min-height:100%;
  margin:0;
  padding:0;
}

html{
  scroll-behavior:smooth;
}

body{
  color:var(--text);
  font:14px/1.45 Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(87,125,255,.18) 0%, transparent 28%),
    radial-gradient(circle at top right, rgba(177,110,255,.14) 0%, transparent 26%),
    radial-gradient(circle at bottom center, rgba(40,76,150,.22) 0%, transparent 30%),
    linear-gradient(180deg, #09111d 0%, #08101b 38%, #060d17 100%);
  color:var(--text);
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(rgba(255,255,255,.018), rgba(255,255,255,0)),
    radial-gradient(circle at 20% 15%, rgba(255,255,255,.035) 0 1px, transparent 1px),
    radial-gradient(circle at 80% 28%, rgba(255,255,255,.03) 0 1px, transparent 1px),
    radial-gradient(circle at 60% 70%, rgba(255,255,255,.025) 0 1px, transparent 1px);
  background-size:auto, 180px 180px, 220px 220px, 260px 260px;
  opacity:.75;
  z-index:0;
}

body.modal-open{
  overflow:hidden;
}

.hidden{
  display:none !important;
}

/* -------------------------------------------------- */
/* App shell */
/* -------------------------------------------------- */
.app-shell{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:var(--sidebar-w) minmax(0, 1fr);
  min-height:100vh;
  width:100%;
}

.sidebar{
  position:relative;
  z-index:2;
  border-right:1px solid var(--stroke2);
  padding:16px;
  background:
    linear-gradient(180deg, rgba(15,23,38,.92), rgba(8,14,24,.88));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:inset -1px 0 0 rgba(255,255,255,.03);
  overflow:auto;
}

.main{
  min-width:0;
  display:flex;
  flex-direction:column;
  gap:12px;
  min-height:100vh;
  padding:14px;
  overflow:hidden;
}

/* -------------------------------------------------- */
/* Shared glass cards */
/* -------------------------------------------------- */
.brand-card,
.side-card,
.hero-card,
.stat-card,
.chat-wrap,
.composer-wrap{
  border:1px solid var(--stroke);
  background:
    linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.03));
  border-radius:24px;
  box-shadow:var(--shadow-soft);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}

.brand-card{
  padding:16px;
  margin-bottom:12px;
}

.side-card{
  padding:14px;
  margin-bottom:10px;
}

/* -------------------------------------------------- */
/* Top hero / topbar */
/* -------------------------------------------------- */
.topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:10px;
  padding:15px 16px;
  flex-wrap:wrap;
}

.topbar-actions{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  align-items:center;
  justify-content:flex-end;
  min-width:0;
}

.hero-card{
  padding:15px 16px;
}

.online-pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  border:1px solid var(--stroke);
  background:rgba(255,255,255,.04);
  border-radius:999px;
  padding:8px 13px;
  white-space:nowrap;
  color:var(--text);
}

.dot{
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--green);
  box-shadow:0 0 18px var(--green);
  flex:0 0 auto;
}

/* -------------------------------------------------- */
/* Buttons / pills */
/* -------------------------------------------------- */
button{
  font:inherit;
}

button,
input,
textarea,
select{
  font:inherit;
}

.pill{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:38px;
  border:1px solid var(--stroke);
  background:rgba(255,255,255,.05);
  color:var(--text);
  border-radius:999px;
  padding:9px 14px;
  cursor:pointer;
  text-decoration:none;
  font-weight:600;
  transition:transform .16s ease, border-color .16s ease, background .16s ease, filter .16s ease, box-shadow .16s ease;
}

.pill:hover{
  transform:translateY(-1px);
  background:rgba(255,255,255,.08);
  border-color:rgba(255,255,255,.16);
  box-shadow:0 8px 24px rgba(0,0,0,.16);
}

.pill:disabled{
  opacity:.6;
  cursor:not-allowed;
  transform:none;
}

.icon-btn,
.send-btn,
.roundBtn,
.buyBtn,
.ghostBtn,
.xBtn{
  transition:transform .16s ease, border-color .16s ease, background .16s ease, filter .16s ease, box-shadow .16s ease;
}

.icon-btn:hover,
.send-btn:hover,
.roundBtn:hover,
.buyBtn:hover,
.ghostBtn:hover,
.xBtn:hover{
  transform:translateY(-1px);
}

.ghostBtn{
  width:100%;
  padding:11px 13px;
  border-radius:15px;
  border:1px solid var(--stroke2);
  color:var(--text);
  cursor:pointer;
  background:rgba(255,255,255,.04);
}

.ghostBtn:hover{
  border-color:rgba(255,255,255,.13);
  background:rgba(255,255,255,.06);
  box-shadow:0 8px 22px rgba(0,0,0,.14);
}

/* -------------------------------------------------- */
/* Chips / stats */
/* -------------------------------------------------- */
.chip-row{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  margin-top:10px;
}

.chip{
  border:1px solid rgba(255,255,255,.09);
  background:rgba(255,255,255,.04);
  border-radius:999px;
  padding:7px 12px;
  font-size:13px;
  color:var(--text);
}

.stats{
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:10px;
  margin-top:12px;
}

.stat-card{
  padding:15px 16px;
  min-height:82px;
}

.muted{ color:var(--muted); }
.tiny{ font-size:12px; line-height:1.45; }

/* -------------------------------------------------- */
/* Chat area */
/* -------------------------------------------------- */
.chat-wrap{
  flex:1 1 auto;
  min-height:320px;
  padding:14px;
  display:flex;
  flex-direction:column;
  overflow:auto;
  scroll-behavior:smooth;
}

#chatMessages{
  display:flex;
  flex-direction:column;
  gap:10px;
  min-height:240px;
  width:100%;
}

#chatMessages::-webkit-scrollbar,
.chat-wrap::-webkit-scrollbar,
#builderLibraryList::-webkit-scrollbar,
#builderPreviewHtml::-webkit-scrollbar{
  width:10px;
}

#chatMessages::-webkit-scrollbar-thumb,
.chat-wrap::-webkit-scrollbar-thumb,
#builderLibraryList::-webkit-scrollbar-thumb,
#builderPreviewHtml::-webkit-scrollbar-thumb{
  background:rgba(255,255,255,.10);
  border-radius:999px;
  border:2px solid transparent;
  background-clip:padding-box;
}

#chatMessages::-webkit-scrollbar-track,
.chat-wrap::-webkit-scrollbar-track,
#builderLibraryList::-webkit-scrollbar-track,
#builderPreviewHtml::-webkit-scrollbar-track{
  background:transparent;
}

.msg-row{
  display:flex;
  margin:4px 0;
}

.msg-user{
  justify-content:flex-end;
}

.msg-assistant{
  justify-content:flex-start;
}

.msg-bubble{
  max-width:min(820px, 90%);
  white-space:pre-wrap;
  word-wrap:break-word;
  line-height:1.52;
  padding:12px 14px;
  border-radius:18px;
  border:1px solid var(--stroke2);
  box-shadow:var(--shadow-soft);
}

.msg-bubble-user{
  color:#f6f8ff;
  background:
    linear-gradient(135deg, rgba(77,125,255,.24), rgba(168,113,255,.20));
  border-color:rgba(132,170,255,.18);
  border-bottom-right-radius:8px;
}

.msg-bubble-assistant{
  color:#e8f0ff;
  background:
    linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border-bottom-left-radius:8px;
}

.msg-bubble img{
  max-width:100%;
  border-radius:14px;
  display:block;
  margin-top:8px;
  border:1px solid rgba(255,255,255,.10);
}

/* -------------------------------------------------- */
/* Assistant rich formatting polish */
/* -------------------------------------------------- */
.msg-bubble-assistant > div[style*="display:grid"]{
  gap:6px !important;
}

.msg-bubble-assistant p,
.msg-bubble-assistant h1,
.msg-bubble-assistant h2,
.msg-bubble-assistant h3,
.msg-bubble-assistant h4{
  margin-top:0;
  margin-bottom:.45em;
}

.msg-bubble-assistant p:last-child,
.msg-bubble-assistant h1:last-child,
.msg-bubble-assistant h2:last-child,
.msg-bubble-assistant h3:last-child,
.msg-bubble-assistant h4:last-child{
  margin-bottom:0;
}

.msg-bubble-assistant p{
  color:#eaf1ff;
  line-height:1.62;
}

.msg-bubble-assistant strong{
  color:#f6f8ff;
  font-weight:800;
}

.msg-bubble-assistant em{
  color:#dce8ff;
}

.msg-bubble-assistant h1,
.msg-bubble-assistant h2,
.msg-bubble-assistant h3{
  color:#f7f9ff;
  line-height:1.3;
  letter-spacing:-.01em;
}

.msg-bubble-assistant h1{
  font-size:19px;
  font-weight:800;
}

.msg-bubble-assistant h2{
  font-size:16px;
  font-weight:800;
}

.msg-bubble-assistant h3{
  font-size:14px;
  font-weight:800;
}

.msg-bubble-assistant ul,
.msg-bubble-assistant ol{
  margin:0;
  padding-left:18px;
}

.msg-bubble-assistant li{
  margin:0;
  line-height:1.58;
  color:#eaf1ff;
}

.msg-bubble-assistant li + li{
  margin-top:4px;
}

.msg-bubble-assistant pre{
  margin:0;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.08);
  background:rgba(6,12,22,.92);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.02);
}

.msg-bubble-assistant code{
  font-family:Consolas, "SFMono-Regular", Menlo, Monaco, monospace;
}

.msg-bubble-assistant pre code{
  display:block;
  color:#edf3ff;
  line-height:1.5;
}

.msg-bubble-assistant :not(pre) > code{
  padding:2px 6px;
  border-radius:8px;
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.08);
  color:#f4f7ff;
  font-size:.95em;
}

.msg-bubble-assistant [data-copy-assistant]{
  min-height:34px;
  border-radius:10px !important;
  border:1px solid rgba(255,255,255,.10) !important;
  background:rgba(255,255,255,.05) !important;
  color:#eef4ff !important;
  font-size:12px !important;
  font-weight:700 !important;
  box-shadow:none;
}

.msg-bubble-assistant [data-copy-assistant]:hover{
  background:rgba(255,255,255,.08) !important;
  border-color:rgba(255,255,255,.16) !important;
  box-shadow:0 8px 22px rgba(0,0,0,.14);
}

/* -------------------------------------------------- */
/* Phase 4.5d dense 3D grouped panel */
/* -------------------------------------------------- */
.msg-bubble-assistant [data-model-choice-wrap]{
  margin-top:6px !important;
  padding:7px !important;
  border-radius:14px !important;
  background:
    linear-gradient(180deg, rgba(255,255,255,.034), rgba(255,255,255,.016)) !important;
  border:1px solid rgba(255,255,255,.07) !important;
  box-shadow:
    0 8px 22px rgba(0,0,0,.16),
    inset 0 1px 0 rgba(255,255,255,.02);
}

.msg-bubble-assistant [data-model-choice-wrap] > div{
  gap:6px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] [style*="margin-bottom:8px"]{
  margin-bottom:5px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] [style*="display:grid; gap:8px;"]{
  gap:5px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] [style*="display:grid; gap:5px;"]{
  gap:3px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] [style*="display:grid; gap:3px;"]{
  gap:1px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] [style*="display:flex; flex-wrap:wrap; gap:6px;"]{
  gap:4px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] button[data-model-choice-url],
.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn{
  min-width:198px !important;
  flex:1 1 198px !important;
  padding:8px !important;
  border-radius:13px !important;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.02),
    0 6px 18px rgba(0,0,0,.12) !important;
  transition:
    transform .18s ease,
    box-shadow .18s ease,
    border-color .18s ease,
    background .18s ease,
    filter .18s ease,
    opacity .18s ease !important;
}

.msg-bubble-assistant [data-model-choice-wrap] [style*="height:54px;"]{
  height:48px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] [style*="padding:8px;"]{
  padding:7px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] [style*="font-size:.96rem"]{
  font-size:.91rem !important;
}

.msg-bubble-assistant [data-model-choice-wrap] [style*="font-size:13px; font-weight:700"]{
  font-size:12px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] [style*="font-size:12px; color:rgba(235,242,255,.72)"]{
  font-size:11px !important;
  line-height:1.22 !important;
}

.msg-bubble-assistant [data-model-choice-wrap] [style*="font-size:12px; line-height:1.42"]{
  line-height:1.28 !important;
  min-height:18px !important;
  margin-top:-1px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] [style*="margin-top:auto"]{
  margin-top:2px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] span{
  letter-spacing:.01em;
}

.msg-bubble-assistant [data-model-choice-wrap] button[data-model-choice-url],
.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn{
  position:relative;
  overflow:hidden;
}

.msg-bubble-assistant [data-model-choice-wrap] button[data-model-choice-url]::before,
.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,0) 40%);
  opacity:.95;
}

.msg-bubble-assistant [data-model-choice-wrap] button[data-model-choice-url]::after,
.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn::after{
  content:"";
  position:absolute;
  inset:auto -18% -42% auto;
  width:110px;
  height:110px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(110,168,255,.14), transparent 68%);
  pointer-events:none;
  opacity:.48;
}

/* -------------------------------------------------- */
/* Composer */
/* -------------------------------------------------- */
.composer-wrap{
  padding:10px;
  display:flex;
  align-items:flex-end;
  gap:10px;
  position:sticky;
  bottom:0;
  z-index:3;
}

#chatInput{
  flex:1;
  resize:none;
  border:none;
  outline:none;
  background:rgba(255,255,255,.03);
  color:var(--text);
  border-radius:20px;
  padding:13px 16px;
  min-height:50px;
  max-height:160px;
  font:inherit;
  line-height:1.4;
}

#chatInput::placeholder{
  color:#aebbd7;
}

.icon-btn{
  width:44px;
  height:44px;
  border-radius:15px;
  border:1px solid var(--stroke);
  background:rgba(255,255,255,.05);
  color:var(--text);
  cursor:pointer;
  flex:0 0 auto;
}

.icon-btn:hover{
  background:rgba(255,255,255,.08);
  border-color:rgba(255,255,255,.16);
  box-shadow:0 8px 20px rgba(0,0,0,.14);
}

.send-btn{
  width:50px;
  height:44px;
  border-radius:15px;
  border:1px solid rgba(140,160,255,.18);
  background:linear-gradient(180deg, rgba(105,120,255,.35), rgba(80,88,180,.35));
  color:#fff;
  cursor:pointer;
  font-size:18px;
  flex:0 0 auto;
  box-shadow:0 10px 26px rgba(70,88,180,.18);
}

.send-btn:hover{
  filter:brightness(1.08);
  border-color:rgba(160,180,255,.35);
  box-shadow:0 12px 28px rgba(70,88,180,.22);
}

#loadingHint{
  text-align:center;
  color:var(--muted);
  font-size:13px;
  padding-top:1px;
  min-height:20px;
}

/* -------------------------------------------------- */
/* Toast */
/* -------------------------------------------------- */
#toastWrap{
  pointer-events:none;
}

.simo-toast{
  pointer-events:auto;
}

/* -------------------------------------------------- */
/* Preview / library / shared modal */
/* -------------------------------------------------- */
.modal{
  position:fixed;
  inset:0;
  z-index:60;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:20px;
  background:rgba(4,8,14,.70);
  backdrop-filter:blur(10px);
}

.modalCard{
  width:min(560px, 100%);
  max-height:min(90vh, 920px);
  overflow:auto;
  border-radius:26px;
  border:1px solid var(--stroke);
  background:
    linear-gradient(180deg, rgba(16,24,39,.96), rgba(9,15,27,.94));
  box-shadow:
    0 30px 90px rgba(0,0,0,.48),
    inset 0 1px 0 rgba(255,255,255,.05);
}

.modalCard.wide{
  width:min(980px, 100%);
}

.modalTop{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:16px 18px;
  border-bottom:1px solid var(--stroke2);
}

.modalTitle{
  font-size:18px;
  font-weight:800;
  color:#f4f7ff;
}

.xBtn{
  width:40px;
  height:40px;
  border-radius:14px;
  border:1px solid var(--stroke2);
  background:rgba(255,255,255,.04);
  color:var(--text);
  cursor:pointer;
  font-size:16px;
}

.modalBody{
  padding:18px;
}

/* -------------------------------------------------- */
/* Buttons generated inside JS modals */
/* -------------------------------------------------- */
#builderPreviewModal button,
#builderLibraryModal button,
#viewer3dModal button,
#settingsModal button{
  font:inherit;
}

#builderPreviewModal button,
#builderLibraryModal button,
#settingsModal button{
  border:1px solid var(--stroke);
  background:rgba(255,255,255,.05);
  color:var(--text);
  border-radius:12px;
  cursor:pointer;
}

#builderPreviewModal button:hover,
#builderLibraryModal button:hover,
#settingsModal button:hover{
  background:rgba(255,255,255,.08);
  border-color:rgba(255,255,255,.16);
}

#builderLibrarySearch,
#builderLibrarySort,
#builderPreviewHtml{
  font:inherit;
}

#builderPreviewModal > div,
#builderLibraryModal > div,
#viewer3dModal > div,
#settingsModal > div{
  box-shadow:
    0 30px 80px rgba(0,0,0,.42),
    inset 0 1px 0 rgba(255,255,255,.035) !important;
}

#builderLibrarySearch{
  min-height:44px;
}

#builderLibrarySort{
  min-height:44px;
}

#builderLibraryList{
  gap:12px !important;
}

#builderLibraryList > [data-build-id]{
  position:relative;
  overflow:hidden;
  border-radius:18px !important;
}

#builderLibraryList > [data-build-id]::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,0) 42%);
}

#builderLibraryStats > div,
#builderLibraryFilters > div{
  gap:8px !important;
}

/* -------------------------------------------------- */
/* Settings modal polish */
/* -------------------------------------------------- */
#settingsModal [data-simo-theme-option]{
  min-height:88px;
  text-align:left;
  border-radius:16px !important;
  transition:transform .16s ease, box-shadow .16s ease, border-color .16s ease, background .16s ease;
}

#settingsModal [data-simo-theme-option]:hover{
  transform:translateY(-1px);
  box-shadow:0 12px 28px rgba(0,0,0,.18);
}

#settingsModal [data-simo-accent-preview]{
  transition:transform .16s ease, box-shadow .16s ease, outline-color .16s ease, filter .16s ease;
}

#settingsModal [data-simo-accent-preview]:hover{
  transform:translateY(-1px) scale(1.04);
  filter:brightness(1.05);
}

#settingsModal section{
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.025),
    0 8px 24px rgba(0,0,0,.12);
}

/* -------------------------------------------------- */
/* Library cards */
/* -------------------------------------------------- */
.libraryCard{
  padding:14px;
  border-radius:18px;
  border:1px solid var(--stroke);
  background:
    linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.03));
  box-shadow:var(--shadow-soft);
}

.libraryTitle{
  font-size:15px;
  font-weight:800;
  color:#eef4ff;
}

.libraryMeta{
  margin-top:4px;
  color:var(--muted);
  font-size:12.5px;
}

.libraryActions{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-top:12px;
}

/* -------------------------------------------------- */
/* Utilities */
/* -------------------------------------------------- */
a{
  color:#b7d1ff;
}

code, pre{
  font-family:Consolas, "SFMono-Regular", Menlo, Monaco, monospace;
}

.main,
.chat-wrap,
#chatMessages,
.topbar,
.topbar-actions,
.composer-wrap,
#chatInput{
  min-width:0;
}

/* -------------------------------------------------- */
/* Responsive */
/* -------------------------------------------------- */
@media (max-width: 1180px){
  :root{ --sidebar-w:250px; }
}

@media (max-width: 1100px){
  .stats{
    grid-template-columns:repeat(2, minmax(0, 1fr));
  }

  .topbar-actions{
    justify-content:flex-end;
  }
}

@media (max-width: 980px){
  .app-shell{
    grid-template-columns:1fr;
  }

  .sidebar{
    display:none;
  }

  .main{
    padding:12px;
  }
}

@media (max-width: 820px){
  .main{
    width:100%;
    max-width:100%;
    min-height:100dvh;
    gap:10px;
    padding:10px;
  }

  .topbar{
    flex-direction:column;
    align-items:flex-start;
    gap:10px;
  }

  .topbar-actions{
    width:100%;
    justify-content:flex-start;
  }

  .stats{
    grid-template-columns:1fr;
  }

  .chat-wrap{
    width:100%;
    padding:12px;
  }

  #chatMessages{
    width:100%;
    min-height:260px;
  }

  .composer-wrap{
    width:100%;
    gap:8px;
    padding:10px;
    flex-wrap:nowrap;
  }

  #chatInput{
    width:100%;
    min-width:0;
    font-size:16px;
  }

  .msg-bubble-assistant [data-model-choice-wrap] button[data-model-choice-url],
  .msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn{
    min-width:100% !important;
    flex:1 1 100% !important;
  }

  #builderPreviewFrame{
    height:420px !important;
  }
}

@media (max-width: 680px){
  .main{
    gap:8px;
    padding:9px;
  }

  .topbar{
    padding:12px;
  }

  .hero-card{
    padding:14px;
  }

  .chat-wrap{
    padding:10px;
  }

  #chatMessages{
    padding:0;
  }

  .msg-bubble{
    max-width:94%;
    padding:12px 13px;
  }

  .composer-wrap{
    gap:8px;
    padding:9px;
  }

  .icon-btn{
    width:42px;
    height:42px;
  }

  .send-btn{
    width:48px;
    height:42px;
  }

  #chatInput{
    min-height:46px;
    border-radius:18px;
  }

  #builderPreviewFrame{
    height:340px !important;
  }
}

@media (max-width: 560px){
  body{
    overflow-x:hidden;
  }

  .brand-card{
    padding:12px;
  }

  .topbar-actions{
    gap:7px;
  }

  .pill{
    padding:9px 11px;
    font-size:13px;
  }

  .hero-card{
    padding:13px;
  }

  .chat-wrap{
    min-height:220px;
  }

  #chatInput{
    font-size:16px;
    padding-left:12px;
    padding-right:12px;
  }
}

/* -------------------------------------------------- */
/* Phase 4.5e — tighten section headers + spacing */
/* -------------------------------------------------- */
.msg-bubble-assistant [data-model-choice-wrap] h4,
.msg-bubble-assistant [data-model-choice-wrap] strong{
  margin-bottom:2px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] p{
  margin-top:0 !important;
  margin-bottom:4px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] > div > div{
  margin-top:2px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] > div{
  gap:4px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] [style*="display:flex"]{
  margin-top:2px !important;
}

/* -------------------------------------------------- */
/* Phase 4.6b — polish only */
/* -------------------------------------------------- */
.msg-bubble-assistant [data-model-choice-wrap] section[style*="grid-template-columns:110px minmax(0,1fr)"]{
  grid-template-columns:136px minmax(0,1fr) !important;
  column-gap:10px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] section[style*="grid-template-columns:110px minmax(0,1fr)"] > div:first-child{
  gap:4px !important;
  padding-top:4px !important;
}

.msg-bubble-assistant [data-model-choice-wrap] section[style*="grid-template-columns:110px minmax(0,1fr)"] > div:first-child > div:first-child{
  font-size:11px !important;
  font-weight:600 !important;
  letter-spacing:.03em !important;
  text-transform:uppercase !important;
  color:rgba(234,241,255,.74) !important;
}

.msg-bubble-assistant [data-model-choice-wrap] section[style*="grid-template-columns:110px minmax(0,1fr)"] > div:first-child > div:last-child{
  font-size:10.5px !important;
  line-height:1.34 !important;
  color:rgba(235,242,255,.52) !important;
  max-width:132px;
}

.msg-bubble-assistant [data-model-choice-wrap] section[style*="grid-template-columns:110px minmax(0,1fr)"] > div:last-child{
  padding-top:2px !important;
}

@media (max-width: 820px){
  .msg-bubble-assistant [data-model-choice-wrap] section[style*="grid-template-columns:110px minmax(0,1fr)"]{
    grid-template-columns:1fr !important;
    row-gap:5px !important;
  }

  .msg-bubble-assistant [data-model-choice-wrap] section[style*="grid-template-columns:110px minmax(0,1fr)"] > div:first-child{
    max-width:none !important;
    padding-top:0 !important;
  }

  .msg-bubble-assistant [data-model-choice-wrap] section[style*="grid-template-columns:110px minmax(0,1fr)"] > div:first-child > div:last-child{
    max-width:none !important;
  }
}

/* -------------------------------------------------- */
/* Phase 4.7a + 4.7b — interaction + header polish */
/* -------------------------------------------------- */
.msg-bubble-assistant [data-model-choice-wrap] section{
  position:relative;
  align-items:start !important;
}

.msg-bubble-assistant [data-model-choice-wrap] section > div:first-child{
  opacity:.93;
  transition:opacity .18s ease, transform .18s ease;
}

.msg-bubble-assistant [data-model-choice-wrap] section::before{
  content:"";
  position:absolute;
  left:136px;
  top:8px;
  bottom:8px;
  width:1px;
  background:linear-gradient(
    to bottom,
    transparent,
    rgba(255,255,255,.055),
    transparent
  );
  pointer-events:none;
  opacity:.42;
}

.msg-bubble-assistant [data-model-choice-wrap] button[data-model-choice-url],
.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn{
  transition:
    transform .18s ease,
    box-shadow .18s ease,
    border-color .18s ease,
    background .18s ease,
    filter .18s ease !important;
}

.msg-bubble-assistant [data-model-choice-wrap] button[data-model-choice-url]:hover,
.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn:hover{
  filter:brightness(1.03);
}

.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn[data-selected="true"],
.msg-bubble-assistant [data-model-choice-wrap] button[data-model-choice-url][data-selected="true"]{
  box-shadow:
    0 12px 30px rgba(78,118,255,.18),
    inset 0 1px 0 rgba(255,255,255,.03) !important;
}

.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn[data-opening="true"],
.msg-bubble-assistant [data-model-choice-wrap] button[data-model-choice-url][data-opening="true"]{
  box-shadow:
    0 16px 38px rgba(80,120,255,.26),
    inset 0 1px 0 rgba(255,255,255,.04) !important;
  border-color:rgba(165,205,255,.42) !important;
  filter:brightness(1.05);
}

.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn[data-dimmed="true"],
.msg-bubble-assistant [data-model-choice-wrap] button[data-model-choice-url][data-dimmed="true"]{
  opacity:.58 !important;
  transform:scale(.985) !important;
  filter:saturate(.90) brightness(.97) !important;
}

.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn[data-last-opened="true"],
.msg-bubble-assistant [data-model-choice-wrap] button[data-model-choice-url][data-last-opened="true"]{
  box-shadow:
    0 12px 26px rgba(110,168,255,.14),
    inset 0 1px 0 rgba(255,255,255,.03) !important;
}

.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn > div:first-child{
  box-shadow:inset 0 1px 0 rgba(255,255,255,.035);
}

.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn span{
  letter-spacing:.012em;
}

.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn [style*="Open model"]{
  opacity:.96;
}

/* -------------------------------------------------- */
/* HEADER POLISH */
/* -------------------------------------------------- */
.msg-bubble-assistant [data-model-choice-wrap] > div:first-child{
  padding-bottom:6px !important;
  margin-bottom:6px !important;
  border-bottom:1px solid rgba(255,255,255,.035);
  box-shadow:0 1px 0 rgba(255,255,255,.015);
}

.msg-bubble-assistant [data-model-choice-wrap] [data-role="recommended-header"]{
  transition:
    transform .18s ease,
    box-shadow .18s ease,
    border-color .18s ease,
    background .18s ease !important;
  border-radius:12px;
}

.msg-bubble-assistant [data-model-choice-wrap] [data-role="open-recommended"]{
  position:relative;
  overflow:hidden;
  box-shadow:0 8px 22px rgba(80,120,255,.10);
}

.msg-bubble-assistant [data-model-choice-wrap] [data-role="open-recommended"]::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,0));
  opacity:.75;
}

.msg-bubble-assistant [data-model-choice-wrap] [data-role="open-recommended"]:hover{
  filter:brightness(1.04);
  box-shadow:0 10px 24px rgba(80,120,255,.16);
}

.msg-bubble-assistant [data-model-choice-wrap] [data-role="recommended-pill"]{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:999px;
}

.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn[data-selected="true"]::after,
.msg-bubble-assistant [data-model-choice-wrap] button[data-model-choice-url][data-selected="true"]::after{
  opacity:.64;
  background:radial-gradient(circle, rgba(110,168,255,.18), transparent 68%);
}

.msg-bubble-assistant [data-model-choice-wrap] .simo-model-choice-btn[data-selected="false"][data-last-opened="true"]::after,
.msg-bubble-assistant [data-model-choice-wrap] button[data-model-choice-url][data-selected="false"][data-last-opened="true"]::after{
  opacity:.36;
}

/* -------------------------------------------------- */
/* mobile safety */
/* -------------------------------------------------- */
@media (max-width: 820px){
  .msg-bubble-assistant [data-model-choice-wrap] section::before{
    display:none;
  }

  .msg-bubble-assistant [data-model-choice-wrap] section > div:first-child{
    opacity:1;
  }
}