/* ============ THEME TOKENS ============ */
  :root{
    --bg:#ffffff; --panel:#f7f7f8; --panel2:#ffffff; --elevated:#ffffff;
    --text:#1f2328; --muted:#6b7280; --faint:#9aa1ac;
    --border:#e6e7eb; --border2:#eeeef1; --hover:#ececef;
    --accent:#6366f1; --accent2:#a855f7; --accent-weak:rgba(99,102,241,.10);
    --user-bubble:#eef0fe; --user-text:#22243a;
    --code-bg:#0f1226; --code-text:#e6e9f5; --code-head:#1b1f3a;
    --shadow:0 8px 30px rgba(17,20,45,.10); --shadow-sm:0 2px 8px rgba(17,20,45,.06);
    --ok:#16a34a;
    /* Easing bersama + permukaan kaca (glassmorphism). Theme-independent: diturunkan dari
       var panel2 sehingga otomatis benar di light & dark tanpa override terpisah. */
    --ease:cubic-bezier(.4,0,.2,1); --ease-out:cubic-bezier(.16,1,.3,1);
    --glass:color-mix(in srgb,var(--panel2) 74%,transparent);
  }
  @media (prefers-color-scheme: dark){
    :root:not([data-theme="light"]){
      --bg:#131417; --panel:#0e0f12; --panel2:#191a1e; --elevated:#202127;
      --text:#ececf1; --muted:#9aa0ab; --faint:#6b7280;
      --border:#2a2c33; --border2:#212228; --hover:#24262d;
      --accent:#7c81ff; --accent2:#b57bff; --accent-weak:rgba(124,129,255,.14);
      --user-bubble:#26283a; --user-text:#e7e9f5;
      --code-bg:#0b0d1a; --code-text:#e6e9f5; --code-head:#151830;
      --shadow:0 12px 40px rgba(0,0,0,.5); --shadow-sm:0 2px 10px rgba(0,0,0,.4);
      --ok:#4ade80;
    }
  }
  :root[data-theme="dark"]{
    --bg:#131417; --panel:#0e0f12; --panel2:#191a1e; --elevated:#202127;
    --text:#ececf1; --muted:#9aa0ab; --faint:#6b7280;
    --border:#2a2c33; --border2:#212228; --hover:#24262d;
    --accent:#7c81ff; --accent2:#b57bff; --accent-weak:rgba(124,129,255,.14);
    --user-bubble:#26283a; --user-text:#e7e9f5;
    --code-bg:#0b0d1a; --code-text:#e6e9f5; --code-head:#151830;
    --shadow:0 12px 40px rgba(0,0,0,.5); --shadow-sm:0 2px 10px rgba(0,0,0,.4);
  }

  *{box-sizing:border-box}
  html,body{height:100%;margin:0}
  body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Ubuntu,Cantarell,"Noto Sans",sans-serif;
    background:var(--bg); color:var(--text); -webkit-font-smoothing:antialiased; overflow:hidden;
  }
  button{font-family:inherit}
  /* Micro-interaction: umpan balik tekan halus di semua tombol (kecuali yang nonaktif). */
  button:not(:disabled):active{transform:translateY(1px) scale(.985)}
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-thumb{background:var(--border);border-radius:20px;border:3px solid transparent;background-clip:content-box}
  ::-webkit-scrollbar-thumb:hover{background:var(--faint);background-clip:content-box}

  .app{display:grid;grid-template-columns:270px 1fr;grid-template-rows:minmax(0,1fr);height:var(--vvh,100dvh);overflow:hidden}

  /* ============ SIDEBAR ============ */
  .sidebar{background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;min-width:0}
  .sb-head{display:flex;align-items:center;gap:10px;padding:14px 14px 10px}
  .brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em;font-size:16px}
  .logo{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;color:#fff;font-weight:800;font-size:15px;
    background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 4px 12px rgba(99,102,241,.4);flex:0 0 auto}
  .new-btn{margin:0 12px 8px;display:flex;align-items:center;justify-content:center;gap:8px;height:42px;border-radius:12px;cursor:pointer;
    font-weight:650;font-size:14px;color:#fff;border:0;background:linear-gradient(135deg,var(--accent),var(--accent2));
    box-shadow:0 6px 16px rgba(99,102,241,.32);transition:transform .12s,filter .12s}
  .new-btn:hover{transform:translateY(-1px);filter:brightness(1.05)}
  .sb-label{font-size:11.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--faint);padding:8px 18px 6px;font-weight:700}
  .sb-search{position:relative;margin:2px 10px 8px}
  .sb-search svg{position:absolute;left:9px;top:50%;transform:translateY(-50%);color:var(--faint);pointer-events:none}
  .sb-search input{width:100%;padding:8px 9px 8px 30px;border-radius:10px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:13px}
  .sb-search input:focus{outline:none;border-color:var(--accent)}
  .sb-search-results{display:none;max-height:260px;overflow-y:auto;border-top:1px solid var(--border2);padding:6px 8px}
  .sb-search-results.show{display:block}
  .sb-search-results .sr{display:block;width:100%;text-align:left;padding:9px 10px;border-radius:9px;cursor:pointer;color:var(--text);font-size:13px;background:none;border:0}
  .sb-search-results .sr:hover{background:var(--hover)}
  .sb-search-results .sr small{display:block;color:var(--faint);font-size:11px;margin-top:1px}
  .sb-search-results .sr-none{color:var(--faint);font-size:12.5px;padding:8px 10px}
  .sb-list{flex:1;overflow-y:auto;padding:0 8px 8px}
  .conv{display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:10px;cursor:pointer;color:var(--text);
    font-size:13.5px;position:relative;transition:background .12s}
  .conv:hover{background:var(--hover)}
  .conv.active{background:var(--accent-weak)}
  .conv .ci{opacity:.6;flex:0 0 auto}
  .conv .ct{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .conv .del{opacity:0;background:transparent;border:0;color:var(--muted);cursor:pointer;border-radius:7px;padding:3px;flex:0 0 auto}
  .conv:hover .del{opacity:.75}.conv .del:hover{opacity:1;color:#ef4444;background:var(--bg)}
  .conv .pin,.conv .arc{opacity:0;background:transparent;border:0;color:var(--muted);cursor:pointer;border-radius:7px;padding:3px;flex:0 0 auto}
  .conv:hover .pin,.conv:hover .arc{opacity:.7}.conv .pin:hover,.conv .arc:hover{opacity:1;color:var(--text);background:var(--bg)}
  .conv .pin{order:1}
  .conv.archived{opacity:.55}
  .conv.pinned .pin{opacity:1;color:var(--accent)}
  .sb-empty{color:var(--faint);font-size:13px;text-align:center;padding:24px 12px}
  .sb-foot{border-top:1px solid var(--border2);padding:10px;display:flex;align-items:center;gap:8px;justify-content:space-between}
  .theme-btn{display:flex;align-items:center;gap:8px;background:transparent;border:1px solid var(--border);color:var(--text);
    border-radius:10px;padding:8px 11px;font-size:13px;cursor:pointer;transition:.12s}
  .theme-btn:hover{border-color:var(--accent);color:var(--accent)}
  .sb-foot small{color:var(--faint);font-size:11.5px}
  .sb-account{border-top:1px solid var(--border2);padding:10px}
  .acc{display:flex;align-items:center;gap:10px;padding:7px 8px;border-radius:11px}
  .acc .aav{width:32px;height:32px;border-radius:9px;flex:0 0 auto;display:grid;place-items:center;color:#fff;font-weight:800;font-size:13px;
    background:linear-gradient(135deg,var(--accent),var(--accent2))}
  .acc .aav.guest{background:linear-gradient(135deg,#64748b,#94a3b8)}
  .acc .ainfo{flex:1;min-width:0}
  .acc .aname{font-size:13.5px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .acc .amail{font-size:11.5px;color:var(--faint);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .acc .aout{background:transparent;border:1px solid var(--border);color:var(--muted);border-radius:9px;width:32px;height:32px;
    display:grid;place-items:center;cursor:pointer;flex:0 0 auto;transition:.12s}
  .acc .aout:hover{color:#ef4444;border-color:#ef4444}
  .acc-guest{display:flex;gap:8px;padding:2px}
  .acc-guest a{flex:1;text-align:center;border:1px solid var(--border);border-radius:10px;padding:9px;font-size:13px;font-weight:650;
    color:var(--text);text-decoration:none;transition:.12s}
  .acc-guest a.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:0;box-shadow:0 6px 14px rgba(99,102,241,.3)}
  .acc-guest a:hover{border-color:var(--accent)}
  .local-clear{margin:8px 2px 0;width:calc(100% - 4px);border:1px solid var(--border);background:transparent;color:var(--muted);
    border-radius:10px;padding:8px 10px;font-size:12.5px;font-weight:650;cursor:pointer;transition:.12s}
  .local-clear:hover{border-color:#ef4444;color:#ef4444;background:color-mix(in srgb,#ef4444 8%,transparent)}

  /* ============ MAIN ============ */
  .main{display:flex;flex-direction:column;min-width:0;min-height:0;overflow:hidden;position:relative;background:var(--bg)}
  .topbar{flex:0 0 auto;display:flex;align-items:center;gap:12px;height:54px;padding:0 14px;border-bottom:1px solid var(--border2);
    background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:blur(8px);position:sticky;top:0;z-index:10}
  .icon-btn{background:transparent;border:1px solid transparent;color:var(--muted);border-radius:10px;width:38px;height:38px;
    display:grid;place-items:center;cursor:pointer;transition:.12s;flex:0 0 auto}
  .icon-btn:hover{background:var(--hover);color:var(--text)}
  .hamb{display:none}
  .topbar .title{font-weight:700;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1;min-width:0}
  .model-chip{display:inline-flex;align-items:center;gap:7px;font-size:12px;color:var(--muted);border:1px solid var(--border);
    padding:5px 10px;border-radius:999px;background:var(--bg)}
  .model-select{flex:0 0 auto;max-width:130px;font-size:12px;color:var(--text);border:1px solid var(--border);background:var(--bg);
    padding:5px 8px;border-radius:9px;cursor:pointer}
  .model-select[hidden]{display:none}
  .prefs-modal{position:fixed;inset:0;z-index:60;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.45);padding:16px}
  .prefs-modal[hidden]{display:none}
  .prefs-card{width:min(520px,100%);background:var(--bg);border:1px solid var(--border2);border-radius:14px;padding:16px;box-shadow:0 10px 40px rgba(0,0,0,.25)}
  .prefs-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
  .prefs-title{font-weight:700;font-size:15px}
  .prefs-note{font-size:12.5px;color:var(--muted);margin:0 0 10px;line-height:1.5}
  .prefs-card textarea{width:100%;box-sizing:border-box;padding:10px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);font-size:13px;resize:vertical;min-height:120px}
  .prefs-actions{display:flex;align-items:center;justify-content:flex-end;gap:8px;margin-top:10px}
  .prefs-count{font-size:11.5px;color:var(--faint);margin-right:auto}
  .notes-modal{position:fixed;inset:0;z-index:60;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.45);padding:16px}
  .notes-modal[hidden]{display:none}
  .notes-card{width:min(640px,100%);height:min(520px,90vh);background:var(--bg);border:1px solid var(--border2);border-radius:14px;padding:16px;box-shadow:0 10px 40px rgba(0,0,0,.25);display:flex;flex-direction:column}
  .notes-body{display:flex;gap:12px;flex:1;min-height:0}
  .notes-list{flex:0 0 38%;overflow-y:auto;border:1px solid var(--border);border-radius:10px;padding:6px;display:flex;flex-direction:column;gap:4px}
  .notes-empty{color:var(--faint);font-size:12.5px;text-align:center;padding:20px 8px}
  .note-item{display:flex;flex-direction:column;gap:2px;text-align:left;background:transparent;border:0;border-radius:8px;padding:7px 9px;cursor:pointer;color:var(--text)}
  .note-item:hover{background:var(--hover)}
  .note-item.active{background:var(--accent-weak)}
  .note-item-t{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .note-item-p{font-size:11.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .notes-editor{flex:1;min-width:0;display:flex;flex-direction:column;gap:8px}
  .notes-editor input,.notes-editor textarea{width:100%;box-sizing:border-box;padding:9px;border:1px solid var(--border);border-radius:9px;background:var(--bg);color:var(--text);font-size:13px}
  .notes-editor textarea{flex:1;min-height:120px;resize:vertical}
    border-radius:999px;padding:5px 11px;background:var(--panel2)}
  .model-chip .dot{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 3px color-mix(in srgb,var(--ok) 25%,transparent)}
  .share-btn{flex:0 0 auto;width:34px;height:34px;border-radius:9px;border:1px solid var(--border);background:var(--bg);color:var(--muted);cursor:pointer;font-size:15px;line-height:1}
  .share-btn:hover{color:var(--accent);border-color:var(--accent)}
  .topbar-search{flex:1;min-width:0;display:flex;align-items:center;gap:8px}
  .topbar-search[hidden]{display:none}
  .topbar-search .cs-ico{color:var(--faint);flex:0 0 auto}
  .topbar-search input{flex:1;min-width:0;padding:7px 11px;border-radius:9px;border:1px solid var(--border);background:#fff;color:var(--text);font-size:13px}
  .topbar-search input:focus{outline:none;border-color:var(--accent)}
  #chatSearchCount{font-size:12px;color:var(--faint);white-space:nowrap}
  .msg.cs-match .bubble{background:color-mix(in srgb,var(--accent) 16%,transparent)}
  .msg.cs-current .bubble{outline:2px solid var(--accent);outline-offset:-2px;box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 25%,transparent)}
  #micBtn.rec{background:#dc2626;color:#fff;animation:statpulse 1s infinite}
  .share-btn:hover{color:var(--accent);border-color:var(--accent)}

  .scroll{flex:1 1 auto;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;scroll-behavior:smooth}
  .col{max-width:768px;margin:0 auto;padding:26px 22px 8px;width:100%}

  /* Welcome / empty state */
  .welcome{min-height:calc(100dvh - 240px);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:6px;padding:20px}
  .welcome .wlogo{width:62px;height:62px;border-radius:18px;font-size:30px;margin-bottom:10px;box-shadow:0 12px 30px rgba(99,102,241,.4)}
  .welcome h1{font-size:clamp(24px,3.4vw,32px);letter-spacing:-.03em;margin:2px 0}
  .welcome h1 .grad{background:linear-gradient(120deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
  .welcome p{color:var(--muted);margin:0 0 18px;max-width:44ch}
  .cards{display:grid;grid-template-columns:1fr 1fr;gap:12px;width:100%;max-width:600px}
  .card{text-align:left;border:1px solid var(--border);background:var(--panel2);border-radius:14px;padding:14px 15px;cursor:pointer;transition:.18s var(--ease)}
  .card:hover{border-color:color-mix(in srgb,var(--accent) 50%,var(--border));transform:translateY(-3px);box-shadow:var(--shadow)}
  .card b{display:block;font-size:14px;margin-bottom:3px}
  .card span{font-size:12.5px;color:var(--muted)}

  /* Messages */
  .msg{padding:14px 0;animation:fade .25s ease}
  @keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
  .msg .row{display:flex;gap:13px;align-items:flex-start}
  .av{width:30px;height:30px;border-radius:9px;flex:0 0 auto;display:grid;place-items:center;font-weight:800;font-size:13px;color:#fff}
  .av.bot{background:linear-gradient(135deg,var(--accent),var(--accent2))}
  .av.user{background:linear-gradient(135deg,#334155,#475569)}
  .msg .name{font-size:12.5px;font-weight:700;color:var(--muted);margin:3px 0 4px}
  .msg.user .row{flex-direction:row-reverse}
  .msg.user .body{display:flex;justify-content:flex-end}
  .msg.user .bubble{background:var(--user-bubble);color:var(--user-text);padding:11px 15px;border-radius:16px 16px 4px 16px;
    max-width:100%;white-space:pre-wrap;overflow-wrap:anywhere;font-size:15px;line-height:1.55}
  .user-files{display:flex;flex-wrap:wrap;gap:8px;margin-top:9px;white-space:normal}
  .user-files .file-chip{background:color-mix(in srgb,var(--bg) 45%,transparent);box-shadow:none;max-width:230px}
  .user-files .file-thumb{width:30px;height:30px;font-size:12px}
  .msg.bot .body{flex:1;min-width:0}
  .prose{font-size:15.5px;line-height:1.7;overflow-wrap:anywhere}
  .prose>*:first-child{margin-top:0}.prose>*:last-child{margin-bottom:0}
  .prose p{margin:0 0 12px}
  .prose h1,.prose h2,.prose h3,.prose h4{margin:18px 0 9px;line-height:1.3;letter-spacing:-.01em}
  .prose h1{font-size:1.5em}.prose h2{font-size:1.3em}.prose h3{font-size:1.13em}.prose h4{font-size:1em}
  .prose ul,.prose ol{margin:4px 0 12px;padding-left:24px}.prose li{margin:4px 0}
  .prose blockquote{border-left:3px solid var(--accent);margin:10px 0;padding:2px 14px;color:var(--muted);background:var(--accent-weak);border-radius:0 8px 8px 0}
  .prose a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}
  .prose hr{border:0;border-top:1px solid var(--border);margin:16px 0}
  .prose :not(pre)>code{background:color-mix(in srgb,var(--muted) 22%,transparent);padding:2px 6px;border-radius:6px;font-size:.88em;
    font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
  .table-wrap{overflow-x:auto;margin:10px 0;border:1px solid var(--border);border-radius:10px}
  .prose table{border-collapse:collapse;width:100%;font-size:14px}
  .prose th,.prose td{border:1px solid var(--border);padding:8px 12px;text-align:left}
  .prose thead th{background:var(--panel);font-weight:700}
  .code-block{margin:12px 0;border-radius:12px;overflow:hidden;border:1px solid var(--border);background:var(--code-bg)}
  .code-top{display:flex;align-items:center;justify-content:space-between;padding:7px 12px;background:var(--code-head);color:#c7cbe6;font-size:12px}
  .code-lang{text-transform:lowercase;letter-spacing:.03em;opacity:.85}
  .code-copy{background:transparent;border:1px solid rgba(255,255,255,.16);color:#c7cbe6;border-radius:7px;padding:3px 10px;font-size:12px;cursor:pointer;transition:.12s}
  .code-copy:hover{background:rgba(255,255,255,.1);color:#fff}
  .code-btns{display:flex;gap:6px}
  .code-prev{background:linear-gradient(135deg,var(--accent),var(--accent2));border:0;color:#fff;border-radius:7px;padding:3px 10px;font-size:12px;font-weight:650;cursor:pointer;transition:.12s}
  .code-prev:hover{filter:brightness(1.12)}
  /* Modal preview HTML/CSS (iframe sandbox) */
  .pv-overlay{position:fixed;inset:0;background:rgba(10,12,24,.62);backdrop-filter:blur(3px);z-index:120;display:none;align-items:center;justify-content:center;padding:22px}
  .pv-overlay.show{display:flex}
  .pv-box{width:min(960px,100%);height:min(680px,100%);background:var(--bg);border:1px solid var(--border);border-radius:16px;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 24px 70px rgba(0,0,0,.45)}
  .pv-head{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--border);background:var(--panel)}
  .pv-title{font-weight:700;font-size:13.5px;color:var(--text)}
  .pv-head .sp{flex:1}
  .pv-btn{background:transparent;border:1px solid var(--border);color:var(--muted);border-radius:8px;padding:5px 11px;font-size:12.5px;cursor:pointer;transition:.12s}
  .pv-btn:hover{color:var(--text);border-color:var(--accent)}
  .pv-frame{flex:1;border:0;width:100%;background:#fff}
  @media (max-width:820px){ .pv-overlay{padding:0} .pv-box{width:100%;height:100%;border-radius:0} }
  /* Modal ajakan daftar (guest nudge, muncul di prompt ke-5) */
  .su-overlay{position:fixed;inset:0;background:rgba(10,12,24,.62);backdrop-filter:blur(3px);z-index:130;display:none;align-items:center;justify-content:center;padding:22px}
  .su-overlay.show{display:flex}
  .su-box{width:min(400px,100%);background:var(--bg);border:1px solid var(--border);border-radius:18px;padding:26px 24px 22px;box-shadow:0 24px 70px rgba(0,0,0,.45);text-align:center;position:relative}
  .su-close{position:absolute;top:12px;right:12px;background:transparent;border:0;color:var(--faint);width:28px;height:28px;border-radius:8px;cursor:pointer;font-size:15px;line-height:1;display:grid;place-items:center;transition:.12s}
  .su-close:hover{color:var(--text);background:var(--hover)}
  .su-icon{font-size:34px;margin-bottom:10px}
  .su-box h3{margin:0 0 8px;font-size:17px;color:var(--text)}
  .su-box p{margin:0 0 20px;font-size:13.5px;color:var(--muted);line-height:1.55}
  .su-actions{display:flex;flex-direction:column;gap:9px}
  .su-actions a{display:block;text-align:center;border:1px solid var(--border);border-radius:11px;padding:11px;font-size:13.5px;font-weight:650;color:var(--text);text-decoration:none;transition:.12s}
  .su-actions a.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:0;box-shadow:0 6px 14px rgba(99,102,241,.3)}
  .su-actions a:hover{border-color:var(--accent)}
  .su-later{margin-top:14px;background:transparent;border:0;color:var(--faint);font-size:12.5px;cursor:pointer;text-decoration:underline;text-underline-offset:2px}
  .su-later:hover{color:var(--muted)}
  .code-block pre{margin:0;padding:13px 14px;overflow-x:auto}
  .code-block code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;color:var(--code-text);line-height:1.6}
  /* Kursor stream: pulse lembut (bukan blink steps yang keras) + gradient aksen. */
  .cursor{display:inline-block;width:7px;height:1.05em;transform:translateY(2px);border-radius:2px;margin-left:2px;
    background:linear-gradient(180deg,var(--accent),var(--accent2));animation:caret 1.15s var(--ease) infinite}
  @keyframes caret{0%,100%{opacity:1}50%{opacity:.18}}
  .stream-text{white-space:pre-wrap;overflow-wrap:anywhere}
  /* Saat teks plain di-swap jadi markdown final, settle halus supaya tak "pop". */
  @keyframes settle{from{opacity:.5;transform:translateY(3px)}to{opacity:1;transform:none}}
  .prose.settled{animation:settle .34s var(--ease-out)}
  .think{display:inline-flex;gap:5px;padding:4px 0}
  .think i{width:8px;height:8px;border-radius:50%;background:var(--muted);animation:bounce 1.3s infinite}
  .think i:nth-child(2){animation-delay:.18s}.think i:nth-child(3){animation-delay:.36s}
  @keyframes bounce{0%,60%,100%{opacity:.3;transform:translateY(0)}30%{opacity:1;transform:translateY(-4px)}}
  .prog{color:var(--muted);font-size:.9em;margin-top:2px;animation:progpulse 1.6s ease-in-out infinite}
  .prog:empty{display:none}
  @keyframes progpulse{0%,100%{opacity:.55}50%{opacity:1}}
  /* Progress bar dokumen/penyiapan: sweep indeterminate ramping di bawah teks status. */
  .prog-bar{height:3px;width:130px;max-width:56%;margin-top:8px;border-radius:99px;overflow:hidden;position:relative;
    background:var(--accent-weak)}
  .prog-bar:before{content:"";position:absolute;top:0;bottom:0;left:0;width:42%;border-radius:99px;
    background:linear-gradient(90deg,transparent,var(--accent),var(--accent2),transparent);animation:progslide 1.3s var(--ease) infinite}
  @keyframes progslide{0%{transform:translateX(-120%)}100%{transform:translateX(300%)}}
  .actions{display:flex;gap:6px;margin:8px 0 0 43px}
  .msg.bot:hover .actions .act{opacity:.7}
  .act{opacity:0;background:transparent;border:1px solid var(--border);color:var(--muted);border-radius:8px;padding:5px 9px;font-size:12px;
    cursor:pointer;display:inline-flex;align-items:center;gap:5px;transition:.12s}
  .act:hover{opacity:1 !important;color:var(--text);border-color:var(--accent)}
  .act.copied{color:var(--ok);border-color:var(--ok)}
  .act.voted{opacity:1 !important;color:var(--accent);border-color:var(--accent)}

  /* Composer */
  .composer-wrap{flex:0 0 auto;padding:8px 22px 14px;background:linear-gradient(180deg,transparent,var(--bg) 30%)}
  .file-strip{max-width:768px;margin:0 auto 8px;display:none;gap:8px;overflow-x:auto;padding:2px 2px 4px}
  .file-strip.show{display:flex}
  .file-chip{display:flex;align-items:center;gap:9px;max-width:260px;border:1px solid var(--border);background:var(--panel2);
    border-radius:12px;padding:8px 9px;box-shadow:var(--shadow-sm);flex:0 0 auto}
  .file-thumb{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;background:var(--accent-weak);color:var(--accent);
    font-weight:800;font-size:15px;overflow:hidden;flex:0 0 auto}
  .file-thumb img{width:100%;height:100%;object-fit:cover}
  .file-thumb.loading{position:relative;color:transparent}
  .file-thumb.loading:after{content:"";width:17px;height:17px;border-radius:50%;border:2px solid color-mix(in srgb,var(--accent) 24%,transparent);
    border-top-color:var(--accent);animation:spin .85s linear infinite}
  @keyframes spin{to{transform:rotate(360deg)}}
  .file-meta{min-width:0}
  .file-name{font-size:12.5px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:170px}
  .file-size{font-size:11px;color:var(--faint)}
  .file-remove{width:26px;height:26px;border-radius:8px;border:1px solid var(--border);background:transparent;color:var(--muted);
    display:grid;place-items:center;cursor:pointer;flex:0 0 auto}
  .file-remove:hover{color:#ef4444;border-color:#ef4444}
  .composer{max-width:768px;margin:0 auto;display:flex;align-items:flex-end;gap:8px;background:var(--glass);
    -webkit-backdrop-filter:blur(12px) saturate(1.4);backdrop-filter:blur(12px) saturate(1.4);
    border:1px solid var(--border);border-radius:22px;padding:8px 8px 8px 16px;box-shadow:var(--shadow-sm);
    transition:border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease)}
  .composer.drag{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-weak)}
  .composer:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-weak)}
  .composer.busy{border-color:color-mix(in srgb,var(--accent) 45%,var(--border));box-shadow:0 0 0 3px var(--accent-weak)}
  .attach{width:40px;height:40px;flex:0 0 auto;border:1px solid transparent;border-radius:14px;cursor:pointer;color:var(--muted);
    display:grid;place-items:center;background:transparent;transition:.12s}
  .attach:hover{background:var(--hover);color:var(--text)}
  .composer textarea{flex:1;resize:none;border:0;outline:0;background:transparent;color:var(--text);font:inherit;font-size:15px;
    line-height:1.5;max-height:200px;padding:9px 0}
  .composer textarea::placeholder{color:var(--faint)}
  .send{width:40px;height:40px;flex:0 0 auto;border:0;border-radius:14px;cursor:pointer;color:#fff;display:grid;place-items:center;
    background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 6px 16px rgba(99,102,241,.32);transition:.16s var(--ease)}
  .send:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 9px 20px rgba(99,102,241,.4)}
  .send:disabled{opacity:.4;cursor:not-allowed;filter:none}
  .send.stop{background:var(--text);box-shadow:none}
  .send.stop:disabled{opacity:1;cursor:pointer}
  .send svg{width:19px;height:19px}
  .hint{max-width:768px;margin:8px auto 0;text-align:center;color:var(--faint);font-size:11.5px}

  /* ============ CANVAS / ARTIFACTS ============ */
  .canvas{display:none;flex-direction:column;min-width:0;min-height:0;overflow:hidden;
    background:var(--panel);border-left:1px solid var(--border)}
  .app.canvas-open{grid-template-columns:270px minmax(0,1fr) clamp(360px,44%,780px)}
  .app.canvas-open .canvas{display:flex;animation:cvIn .28s var(--ease-out)}
  @keyframes cvIn{from{opacity:0;transform:translateX(16px)}to{opacity:1;transform:none}}
  .cv-head{flex:0 0 auto;display:flex;align-items:center;gap:7px;height:52px;padding:0 10px 0 14px;
    border-bottom:1px solid var(--border2);background:var(--glass);
    -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
  .cv-title{font-size:13.5px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:34%}
  .cv-badge{font-size:10.5px;font-weight:700;letter-spacing:.03em;text-transform:uppercase;color:var(--accent);
    background:var(--accent-weak);border-radius:999px;padding:3px 8px;flex:0 0 auto}
  .cv-tabs{display:inline-flex;gap:2px;background:var(--panel2);border:1px solid var(--border);border-radius:10px;padding:2px;margin-left:4px}
  .cv-tab{border:0;background:transparent;color:var(--muted);font-weight:650;font-size:12.5px;border-radius:8px;
    padding:5px 11px;cursor:pointer;transition:.14s var(--ease)}
  .cv-tab.active{background:var(--elevated);color:var(--text);box-shadow:var(--shadow-sm)}
  .canvas.code-only .cv-tab[data-tab=preview]{display:none}
  .cv-sp{flex:1 1 auto}
  .cv-btn{border:1px solid var(--border);background:var(--panel2);color:var(--muted);border-radius:9px;
    padding:5px 9px;font-size:12px;font-weight:600;cursor:pointer;transition:.14s var(--ease);flex:0 0 auto;line-height:1}
  .cv-btn:hover{color:var(--text);border-color:var(--accent)}
  .cv-btn.copied{color:var(--ok);border-color:var(--ok)}
  .cv-close{color:var(--faint)}
  .cv-body{flex:1 1 auto;position:relative;min-height:0;background:var(--bg)}
  .cv-frame{position:absolute;inset:0;width:100%;height:100%;border:0;background:#fff}
  .cv-code{position:absolute;inset:0;display:none;width:100%;height:100%;border:0;outline:0;resize:none;
    background:var(--code-bg);color:var(--code-text);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
    font-size:12.5px;line-height:1.6;padding:14px 16px 34px;box-sizing:border-box;white-space:pre;tab-size:2}
  .cv-editnote{position:absolute;left:0;right:0;bottom:0;display:none;font-size:11px;color:var(--faint);
    background:color-mix(in srgb,var(--code-head) 92%,transparent);border-top:1px solid rgba(255,255,255,.06);
    padding:6px 16px;pointer-events:none}
  .canvas.show-code .cv-frame{display:none}
  .canvas.show-code .cv-code{display:block}
  .canvas.show-code .cv-editnote{display:block}

  .to-bottom{position:absolute;bottom:96px;left:50%;transform:translateX(-50%);width:38px;height:38px;border-radius:50%;
    background:var(--elevated);border:1px solid var(--border);color:var(--text);cursor:pointer;display:none;place-items:center;
    box-shadow:var(--shadow);z-index:5}
  .to-bottom.show{display:grid}

  .overlay{display:none}

  /* Tap feedback (mobile terasa responsif) */
  .send:active{transform:scale(.9)}
  .new-btn:active{transform:scale(.97)}
  .icon-btn:active,.act:active,.theme-btn:active,.conv:active,.card:active,.chip:active,.code-copy:active,.aout:active,.acc-guest a:active,.attach:active,.file-remove:active{transform:scale(.95)}
  .msg.user .bubble,.card,.conv,.act,.attach,.file-remove{-webkit-tap-highlight-color:transparent}

  /* Di perangkat sentuh: tombol aksi tak bisa hover → tampilkan permanen */
  @media (hover:none){
    .act{opacity:.85}
    .conv .del,.conv .edit,.conv .pin,.conv .arc{opacity:.7}
    .msg.bot:hover .actions .act,.msg.user:hover .actions .act{opacity:.85}
  }

  /* ============ TOASTS ============ */
  .toasts{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom));transform:translateX(-50%);z-index:100;
    display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}
  .toast{display:flex;align-items:center;gap:10px;background:var(--elevated);color:var(--text);border:1px solid var(--border);
    border-radius:12px;padding:11px 15px;box-shadow:var(--shadow);font-size:13.5px;line-height:1.4;pointer-events:auto;
    max-width:min(440px,92vw);animation:toastIn .22s cubic-bezier(.2,.8,.2,1);cursor:pointer}
  .toast.out{animation:toastOut .18s ease forwards}
  .toast .tico{flex:0 0 auto;font-size:15px;line-height:1}
  .toast.ok{border-color:color-mix(in srgb,var(--ok) 55%,var(--border))} .toast.ok .tico{color:var(--ok)}
  .toast.err{border-color:color-mix(in srgb,#ef4444 55%,var(--border))}
  @keyframes toastIn{from{opacity:0;transform:translateY(12px) scale(.96)}to{opacity:1;transform:none}}
  @keyframes toastOut{to{opacity:0;transform:translateY(8px) scale(.98)}}

  /* ============ STATUS CHIP ============ */
  .model-chip{transition:border-color .2s}
  .model-chip .dot.warn{background:#f59e0b;box-shadow:0 0 0 3px color-mix(in srgb,#f59e0b 25%,transparent);animation:statpulse 1.3s infinite}
  .model-chip .dot.off{background:#ef4444;box-shadow:0 0 0 3px color-mix(in srgb,#ef4444 25%,transparent)}
  @keyframes statpulse{50%{opacity:.35}}

  /* ============ EDIT MESSAGE ============ */
  .msg.user:hover .actions .act{opacity:.7}
  .msg.user .actions{justify-content:flex-end;margin:6px 0 0;padding-right:2px}
  .edit-area{width:100%;min-height:46px;max-height:260px;resize:none;border:1px solid var(--accent);border-radius:14px;
    background:var(--panel2);color:var(--text);font:inherit;font-size:15px;line-height:1.55;padding:11px 14px;outline:none;
    box-shadow:0 0 0 3px var(--accent-weak)}
  .edit-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:8px}
  .edit-actions button{border-radius:10px;padding:8px 15px;font-size:13px;font-weight:650;cursor:pointer;
    border:1px solid var(--border);background:var(--panel2);color:var(--text);transition:.12s}
  .edit-actions .save{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:0}
  .edit-actions button:hover{filter:brightness(1.05);border-color:var(--accent)}
  .msg .name .time,.actions .when{color:var(--faint);font-weight:500;font-size:11.5px;margin-left:8px}
  .actions .when{align-self:center}

  /* ============ RENAME CONVERSATION ============ */
  .conv .edit{opacity:0;background:transparent;border:0;color:var(--muted);cursor:pointer;border-radius:7px;padding:3px;flex:0 0 auto}
  .conv:hover .edit{opacity:.7} .conv .edit:hover{opacity:1;color:var(--accent);background:var(--bg)}
  .conv .rename{flex:1;min-width:0;border:1px solid var(--accent);border-radius:8px;background:var(--bg);color:var(--text);
    font:inherit;font-size:13.5px;padding:4px 8px;outline:none;box-shadow:0 0 0 3px var(--accent-weak)}

  /* ============ WELCOME CAPABILITY CHIPS ============ */
  .caps{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:18px auto 2px;max-width:560px}
  .chip{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--border);background:var(--panel2);color:var(--text);
    border-radius:999px;padding:8px 14px;font-size:13px;font-weight:600;cursor:pointer;transition:.14s}
  .chip:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}

  /* ============ RESPONSIVE ============ */
  @media (max-width:820px){
    .app{grid-template-columns:1fr}
    .app.canvas-open{grid-template-columns:1fr}
    .app.canvas-open .canvas{position:fixed;inset:0;z-index:50;border-left:0;padding-top:env(safe-area-inset-top)}
    /* Layar sempit: sembunyikan elemen non-esensial agar toolbar tak meluber dan tombol
       Tutup (✕) SELALU terlihat/terjangkau. */
    .cv-head{gap:5px;padding:0 8px}
    .cv-title,.cv-badge,#cvNewTab{display:none}
    .cv-btn{padding:7px 10px}   /* target sentuh lebih besar */
    .sidebar{position:fixed;z-index:40;top:0;left:0;bottom:0;width:280px;transform:translateX(-100%);transition:transform .24s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow);padding-top:env(safe-area-inset-top)}
    .app.nav-open .sidebar{transform:none}
    .sidebar.dragging{transition:none}
    .overlay.dragging{transition:none}
    .hamb{display:grid}
    .overlay{display:block;position:fixed;inset:0;background:rgba(0,0,0,.45);opacity:0;pointer-events:none;transition:opacity .24s;z-index:35;-webkit-tap-highlight-color:transparent}
    .app.nav-open .overlay{opacity:1;pointer-events:auto}
    .topbar{padding-top:env(safe-area-inset-top);height:calc(54px + env(safe-area-inset-top))}
    .sb-list{-webkit-overflow-scrolling:touch}
    .cards{grid-template-columns:1fr}
    .col{padding:18px 15px 8px}
    .msg .row{gap:11px}
    .prose{font-size:16px}
    .msg.user .bubble{font-size:16px}
    .actions{margin-left:41px}
    .act{padding:8px 12px;font-size:13px}          /* target sentuh lebih besar */
    .conv{padding:12px 10px}
    .icon-btn{width:42px;height:42px}
    .file-strip{padding:2px 0 5px}
    .file-chip{max-width:230px}
    .file-name{max-width:140px}
    .composer{padding:7px 7px 7px 15px}
    .composer textarea,.edit-area{font-size:16px}  /* cegah auto-zoom iOS */
    .act{gap:6px}
    .composer-wrap{padding:8px 12px calc(10px + env(safe-area-inset-bottom))}
    .send{width:42px;height:42px}
    .to-bottom{bottom:calc(90px + env(safe-area-inset-bottom))}
    .hint{display:none}                            /* hemat ruang di layar kecil */
  }
  @media (prefers-reduced-motion:reduce){*{transition:none !important;animation:none !important}}

/* Gambar hasil pembuatan di dalam balasan. Dibatasi lebar wadah supaya gambar besar
   (1024px) tidak memaksa balasan menggulir horizontal di layar kecil. */
.msg-img{max-width:100%;height:auto;display:block;margin:.5rem 0;border-radius:12px;
  border:1px solid var(--line,rgba(127,127,127,.2));background:var(--accent-weak)}