:root{
  color-scheme:light;
  --tk-bg:#ddd4c8;
  --tk-panel:#fffdf9;
  --tk-panel-soft:#f7efe4;
  --tk-paper:#faf7f1;
  --tk-text:#211915;
  --tk-muted:#7a6e65;
  --tk-line:#d9c9b7;
  --tk-line-strong:#c7ad91;
  --tk-wine:#721f24;
  --tk-wine-deep:#531519;
  --tk-gold:#b6802f;
  --tk-shadow:0 14px 34px -24px rgba(55,31,22,.42);
  --tk-control-shadow:0 8px 18px -13px rgba(55,31,22,.52),inset 0 1px 0 rgba(255,255,255,.78);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{width:100%;height:100%;margin:0}
body.toki-app{
  min-width:0;min-height:100dvh;overflow:hidden;padding:0;
  font-family:"Aptos","Segoe UI Variable","Segoe UI","Noto Sans","Noto Sans Devanagari","Nirmala UI",Arial,sans-serif;
  color:var(--tk-text);background:var(--tk-bg);-webkit-font-smoothing:antialiased;
}
button,input,textarea,select{font:inherit}
button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

.toki-shell{
  width:100%;height:100dvh;display:grid;grid-template-columns:56px 220px minmax(0,1fr);
  overflow:hidden;background:var(--tk-bg);
}
.toki-rail{
  position:relative;z-index:24;min-width:0;height:100dvh;display:flex;flex-direction:column;align-items:center;gap:10px;
  padding:14px 8px;border-right:1px solid var(--tk-line);background:#f7efe4;
}
.toki-sidebar{
  position:relative;z-index:20;min-width:0;height:100dvh;display:flex;flex-direction:column;
  padding:16px 12px 13px;border-right:1px solid var(--tk-line);
  background:#f4ecdf;transition:transform .22s ease,width .22s ease,padding .22s ease;
}
.toki-brand{display:block;min-height:38px;margin:2px 7px 15px}
.toki-brand strong{display:block;font-family:"Palatino Linotype",Georgia,serif;font-size:20px;line-height:1;color:var(--tk-wine)}
.toki-brand span{display:block;margin-top:4px;color:var(--tk-muted);font-size:12px;font-weight:650}
.toki-icon,.toki-back,.toki-compose-icon,.history-menu,.history-actions button,.toki-sidebar-foot button{
  display:inline-grid;place-items:center;flex:0 0 auto;border:1px solid rgba(191,165,137,.72);
  color:var(--tk-wine);background:rgba(255,250,242,.74);box-shadow:var(--tk-control-shadow);
  backdrop-filter:blur(9px);-webkit-backdrop-filter:blur(9px);transition:background .16s,border-color .16s,transform .16s,box-shadow .16s;
}
.toki-icon,.toki-back{width:38px;height:38px;border-radius:13px;text-decoration:none}
.toki-icon:hover,.toki-back:hover,.toki-compose-icon:hover,.history-menu:hover,.history-actions button:hover,.toki-sidebar-foot button:hover{
  border-color:var(--tk-wine);background:#fffaf2;box-shadow:0 10px 22px -14px rgba(82,22,27,.55),inset 0 1px 0 #fff;
}
.toki-icon:active,.toki-back:active,.toki-compose-icon:active,.toki-new:active,.toki-send:active{transform:translateY(1px)}
.toki-back svg{width:19px;height:19px}
.toki-new{
  width:100%;min-height:44px;display:flex;align-items:center;justify-content:center;gap:9px;
  margin:0 0 12px;border:1px solid rgba(114,31,36,.28);border-radius:14px;
  color:var(--tk-wine);background:rgba(255,250,242,.82);box-shadow:var(--tk-control-shadow);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  font-size:14px;font-weight:800;transition:background .16s,border-color .16s,transform .16s,box-shadow .16s;
}
.toki-new:hover{border-color:var(--tk-wine);background:#fffaf2;box-shadow:0 12px 24px -15px rgba(82,22,27,.58),inset 0 1px 0 #fff}
.toki-new svg{width:18px;height:18px}
.toki-search{
  min-height:42px;display:flex;align-items:center;gap:8px;padding:0 11px;margin-bottom:18px;
  border:1px solid var(--tk-line);border-radius:13px;color:var(--tk-muted);background:rgba(255,250,242,.72);
}
.toki-search:focus-within{border-color:var(--tk-wine);box-shadow:0 0 0 3px rgba(114,31,36,.08)}
.toki-search svg{width:17px;height:17px}
.toki-search input{width:100%;min-width:0;border:0;outline:0;color:var(--tk-text);background:transparent;font-size:14px}
.toki-search input::placeholder{color:#918177}
.toki-section-label{margin:0 7px 8px;color:var(--tk-wine);font-size:12px;font-weight:850;letter-spacing:.1em;text-transform:uppercase}
.toki-history{min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#cdbca8 transparent}
.history-item{
  position:relative;display:grid;grid-template-columns:minmax(0,1fr) 32px;align-items:center;gap:4px;
  min-height:48px;margin:3px 0;padding:5px 5px 5px 11px;border:1px solid transparent;border-radius:12px;color:var(--tk-text);
}
.history-item:hover{border-color:rgba(199,173,145,.55);background:rgba(255,250,242,.58)}
.history-item.active{border-color:rgba(114,31,36,.18);background:#fff9ef;box-shadow:0 9px 20px -18px rgba(55,31,22,.55)}
.history-main{min-width:0;border:0;padding:0;text-align:left;color:inherit;background:transparent}
.history-main strong,.history-main span{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.history-main strong{font-size:14px;font-weight:720}
.history-main span{margin-top:4px;color:var(--tk-muted);font-size:12px}
.history-menu{width:31px;height:31px;border-radius:10px;box-shadow:none;opacity:.68}
.history-menu svg{width:18px;height:18px;fill:currentColor;stroke:none}
.history-item:hover .history-menu,.history-item.menu-open .history-menu{opacity:1}
.history-popover{
  position:fixed;z-index:60;display:grid;min-width:150px;padding:5px;border:1px solid var(--tk-line);border-radius:12px;
  background:var(--tk-paper);box-shadow:0 18px 36px -18px rgba(44,27,20,.52);
}
.history-popover[hidden]{display:none}
.history-popover button{display:flex;align-items:center;justify-content:flex-start;gap:8px;width:100%;height:36px;padding:0 9px;border:0;border-radius:8px;color:var(--tk-text);background:transparent;font-size:13px}
.history-popover button:hover{color:var(--tk-wine);background:var(--tk-panel-soft)}
.history-popover svg{width:16px;height:16px}
.history-empty{padding:16px 8px;color:var(--tk-muted);font-size:13px;line-height:1.6;text-align:center}
.toki-sidebar-foot{margin-top:auto;padding-top:12px;border-top:1px solid var(--tk-line)}
.toki-sidebar-foot button{width:100%;height:38px;display:flex;justify-content:center;gap:8px;border-radius:12px;font-size:13px;font-weight:700}
.toki-sidebar-foot button svg{width:17px;height:17px}

.toki-chat{min-width:0;height:100dvh;display:grid;grid-template-rows:64px minmax(0,1fr) auto;background:var(--tk-bg)}
.toki-topbar{
  position:relative;z-index:12;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 18px;
  border-bottom:1px solid var(--tk-line);background:#f7efe4;
}
.toki-top-left,.toki-top-actions{display:flex;align-items:center;gap:8px}
.toki-top-left{min-width:0;flex:1}.toki-top-actions{flex:0 0 auto}
.toki-title-editor{min-width:0;display:flex;align-items:center}
.toki-title-button{min-width:0;max-width:min(48vw,600px);display:flex;align-items:center;gap:7px;padding:7px 8px;border:0;border-radius:10px;color:var(--tk-text);background:transparent;text-align:left}
.toki-title-button:hover,.toki-title-button:focus-visible{background:rgba(255,250,242,.76);outline:0}
.toki-title-button strong{display:block;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:15px;font-weight:760}
.toki-title-button svg{width:15px;height:15px;flex:0 0 auto;color:var(--tk-muted);opacity:0;transition:opacity .16s}
.toki-title-button:hover svg,.toki-title-button:focus-visible svg{opacity:1}
.toki-title-input{width:min(48vw,600px);height:38px;padding:0 10px;border:1px solid var(--tk-wine);border-radius:10px;outline:0;color:var(--tk-text);background:var(--tk-paper);box-shadow:0 0 0 3px rgba(114,31,36,.08);font-size:15px;font-weight:760}
.toki-top-actions .toki-icon{width:38px;height:38px}

.toki-thread{
  min-height:0;overflow:auto;overscroll-behavior:contain;scroll-behavior:smooth;
  padding:34px max(20px,calc((100% - 820px)/2)) 30px;background:var(--tk-bg);
}
.toki-welcome{min-height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:8px 0 84px;text-align:center}
.toki-mascot{width:176px;height:176px;margin-bottom:10px;pointer-events:auto}
.toki-mascot-frame{display:block;width:100%;height:100%;border:0;background:transparent}
.toki-kicker{margin:0 0 7px;color:var(--tk-wine);font-size:12px;font-weight:850;letter-spacing:.16em}
.toki-welcome h1{
  margin:0;font-family:"Palatino Linotype","Noto Serif",Georgia,serif;
  color:var(--tk-text);font-size:clamp(27px,4vw,40px);font-weight:500;letter-spacing:-.025em;
}
.toki-welcome>p:not(.toki-kicker){max-width:570px;margin:13px 0 0;color:var(--tk-muted);font-size:15px;line-height:1.65}
.toki-messages{display:grid;gap:27px;width:100%}
.toki-message{display:block;min-width:0}
.toki-message.user{display:flex;justify-content:flex-end}
.toki-message.user .message-body{max-width:min(82%,690px)}
.toki-message.assistant .message-body{width:100%;max-width:100%}
.message-body{min-width:0;max-width:100%}
.message-bubble{
  width:fit-content;max-width:100%;padding:14px 16px;border:1px solid var(--tk-line);border-radius:16px;
  color:var(--tk-text);background:var(--tk-paper);box-shadow:var(--tk-shadow);font-size:15px;line-height:1.68;overflow-wrap:anywhere;
}
.user .message-bubble{border-color:#d6bca5;background:#f8eee2}
.assistant .message-bubble{width:100%;padding:0;border:0;border-radius:0;background:transparent;box-shadow:none;overflow:visible}
.message-bubble>:first-child{margin-top:0}.message-bubble>:last-child{margin-bottom:0}
.message-bubble p,.message-bubble ul,.message-bubble ol{margin:0 0 10px}
.message-bubble h2,.message-bubble h3{margin:15px 0 7px;color:var(--tk-wine);font-size:16px;line-height:1.4}
.message-bubble ul,.message-bubble ol{padding-left:21px}
.message-bubble a,.message-bubble .hanzi{color:var(--tk-wine)}
.message-bubble code,.message-bubble pre{border:1px solid var(--tk-line);border-radius:8px;background:var(--tk-panel-soft)}
.message-bubble code{padding:2px 5px}.message-bubble pre{overflow:auto;padding:11px}
.message-files{display:grid;gap:8px;margin-top:9px}
.message-file{max-width:360px;padding:9px;border:1px solid var(--tk-line);border-radius:12px;background:#fffaf2;color:var(--tk-muted);font-size:13px}
.message-file img{display:block;width:100%;height:auto;margin-bottom:7px;border-radius:8px}
.message-tools{display:flex;gap:3px;margin-top:8px}
.message-tools button{width:31px;height:31px;display:grid;place-items:center;border:1px solid transparent;border-radius:9px;color:var(--tk-muted);background:transparent}
.message-tools button:hover{border-color:var(--tk-line);color:var(--tk-wine);background:#fffaf2}
.message-tools button.is-active{border-color:rgba(114,31,36,.24);color:var(--tk-wine);background:#fff7ec}
.message-tools svg{width:16px;height:16px}
.message-inline-edit{display:grid;gap:9px;min-width:min(620px,72vw)}
.message-inline-edit textarea{width:100%;min-height:88px;max-height:260px;resize:vertical;padding:11px 12px;border:1px solid rgba(114,31,36,.3);border-radius:12px;outline:0;color:var(--tk-text);background:#fffaf2;font:inherit;line-height:1.55;box-shadow:inset 0 1px 2px rgba(52,29,21,.06)}
.message-inline-edit textarea:focus{border-color:var(--tk-wine);box-shadow:0 0 0 3px rgba(114,31,36,.08)}
.message-inline-edit>div{display:flex;justify-content:flex-end;gap:6px}
.message-inline-edit button{width:34px;height:34px;display:grid;place-items:center;border:1px solid rgba(114,31,36,.24);border-radius:10px;color:var(--tk-wine);background:rgba(255,250,242,.92);box-shadow:var(--tk-control-shadow)}
.message-inline-edit button:hover{border-color:var(--tk-wine);background:#fff}
.message-inline-edit svg{width:17px;height:17px}
.typing-dots{display:flex;gap:5px;padding:4px 1px}
.typing-dots i{width:6px;height:6px;border-radius:50%;background:var(--tk-wine);animation:tokiDot 1.05s infinite ease-in-out}
.typing-dots i:nth-child(2){animation-delay:.15s}.typing-dots i:nth-child(3){animation-delay:.3s}

.toki-composer-wrap{position:relative;z-index:10;padding:10px max(18px,calc((100% - 820px)/2)) 12px;background:var(--tk-bg)}
.toki-attachments{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:7px}
.attachment-chip{display:flex;align-items:center;gap:7px;max-width:260px;padding:6px 9px;border:1px solid var(--tk-line);border-radius:10px;background:var(--tk-panel);font-size:12px}
.attachment-chip span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.attachment-chip button{border:0;color:var(--tk-muted);background:transparent}
.toki-composer{
  min-height:58px;display:grid;grid-template-columns:40px minmax(0,1fr) 40px 44px;align-items:end;gap:7px;
  padding:7px 8px;border:1px solid var(--tk-line-strong);border-radius:17px;background:#fffaf2;
  box-shadow:0 16px 34px -24px rgba(52,29,21,.62),inset 0 1px 0 #fff;transition:border-color .16s,box-shadow .16s;
}
.toki-composer:focus-within{border-color:var(--tk-wine);box-shadow:0 0 0 3px rgba(114,31,36,.08),0 16px 34px -24px rgba(52,29,21,.62)}
.toki-composer textarea{width:100%;min-height:40px;max-height:180px;resize:none;border:0;outline:0;padding:9px 3px;color:var(--tk-text);background:transparent;font-size:15px;line-height:1.48}
.toki-composer textarea::placeholder{color:#8e7e72}
.toki-compose-icon{width:40px;height:40px;border-radius:13px}
.toki-send{
  width:44px;height:44px;display:grid;place-items:center;border:1px solid rgba(114,31,36,.34);border-radius:14px;
  color:var(--tk-wine);background:rgba(255,250,242,.92);box-shadow:var(--tk-control-shadow);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);transition:background .16s,border-color .16s,transform .16s,box-shadow .16s;
}
.toki-send:hover{border-color:var(--tk-wine);background:#fff;box-shadow:0 11px 24px -14px rgba(82,22,27,.62),inset 0 1px 0 #fff}
.toki-send svg{width:20px;height:20px}
.toki-send .stop-glyph{display:none;fill:currentColor;stroke:none}
.toki-send.is-stopping .send-glyph{display:none}.toki-send.is-stopping .stop-glyph{display:block}
.toki-send.is-stopping{color:#fffaf3;background:var(--tk-wine);border-color:var(--tk-wine)}
.toki-send:disabled{cursor:default;opacity:.45;box-shadow:none}
.toki-disclaimer{margin:8px 4px 0;color:var(--tk-muted);font-size:12px;line-height:1.45;text-align:center}

.toki-overlay{position:fixed;inset:0;z-index:18;background:rgba(40,29,24,.24)}
.toki-overlay[hidden]{display:none}
.toki-settings{
  width:min(440px,calc(100vw - 28px));padding:0;border:1px solid var(--tk-line-strong);border-radius:17px;color:var(--tk-text);
  background:var(--tk-paper);box-shadow:0 28px 70px -26px rgba(43,27,20,.52);
}
.toki-settings::backdrop{background:rgba(40,29,24,.3);backdrop-filter:blur(3px)}
.toki-settings form{display:grid;gap:17px;padding:20px}
.settings-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:14px;border-bottom:1px solid var(--tk-line)}
.settings-head p{margin:0 0 4px;color:var(--tk-wine);font-size:11px;font-weight:850;letter-spacing:.14em}
.settings-head h2{margin:0;font-family:"Palatino Linotype",Georgia,serif;font-size:23px;font-weight:500}
.toki-settings label{display:grid;gap:7px;font-size:14px;font-weight:700}
.toki-settings select{height:43px;padding:0 11px;border:1px solid var(--tk-line);border-radius:11px;color:var(--tk-text);background:var(--tk-panel)}
.settings-toggle{grid-template-columns:minmax(0,1fr) auto;align-items:center}
.settings-toggle small{display:block;margin-top:4px;color:var(--tk-muted);font-size:12px;font-weight:500;line-height:1.45}
.settings-toggle input{width:19px;height:19px;accent-color:var(--tk-wine)}
.settings-danger{padding-top:3px}.settings-danger button{border:0;padding:0;color:#a22c33;background:transparent;font-size:13px;font-weight:750}
.settings-save{height:44px;border:1px solid var(--tk-wine);border-radius:13px;color:#fffaf3;background:var(--tk-wine);font-weight:800}
.settings-save:hover{background:var(--tk-wine-deep)}
.toki-toast{
  position:fixed;z-index:50;left:50%;bottom:18px;max-width:min(520px,calc(100vw - 30px));padding:10px 14px;
  border:1px solid var(--tk-line-strong);border-radius:12px;color:var(--tk-text);background:var(--tk-paper);
  box-shadow:0 15px 32px -20px rgba(43,27,20,.52);font-size:13px;line-height:1.45;opacity:0;transform:translate(-50%,14px);pointer-events:none;transition:.2s;
}
.toki-toast.show{opacity:1;transform:translate(-50%,0)}
.toki-embed .toki-rail,.toki-embed .toki-sidebar,.toki-embed .toki-topbar{display:none}
.toki-embed .toki-shell{grid-template-columns:1fr}.toki-embed .toki-chat{grid-template-rows:minmax(0,1fr) auto}
.toki-embed .toki-chat{grid-column:1}
.toki-embed .toki-thread{padding-top:20px}.toki-embed .toki-disclaimer{display:none}

@keyframes tokiDot{0%,60%,100%{transform:translateY(0);opacity:.45}30%{transform:translateY(-4px);opacity:1}}
@media(max-width:780px){
  .toki-shell{grid-template-columns:56px minmax(0,1fr)}
  .toki-rail{grid-column:1;grid-row:1}
  .toki-chat{grid-column:2;grid-row:1}
  .toki-sidebar{position:fixed;inset:0 auto 0 56px;width:min(300px,calc(100vw - 56px));transform:translateX(-102%);box-shadow:18px 0 40px -30px rgba(43,27,20,.62)}
  body.sidebar-visible .toki-sidebar{transform:translateX(0)}
  .toki-topbar{padding:0 12px}
  .toki-top-actions{gap:5px}.toki-top-actions .toki-icon{width:36px;height:36px}
  .toki-thread{padding:24px 14px 24px}
  .toki-composer-wrap{padding:8px 10px 10px}
  .toki-message.user .message-body{max-width:90%}
}
@media(min-width:781px){
  body.sidebar-collapsed .toki-shell{grid-template-columns:56px 0 minmax(0,1fr)}
  body.sidebar-collapsed .toki-sidebar{width:0;padding-left:0;padding-right:0;overflow:hidden;border-right:0}
}
@media(max-width:520px){
  .toki-chat{grid-template-rows:58px minmax(0,1fr) auto}
  .toki-top-actions #shareChat{display:none}
  .toki-welcome{padding-bottom:58px}.toki-mascot{width:142px;height:142px}
  .toki-welcome h1{font-size:27px}.toki-welcome>p:not(.toki-kicker){font-size:14px}
  .toki-composer{grid-template-columns:38px minmax(0,1fr) 38px 42px;gap:4px;padding:6px}
  .toki-compose-icon{width:38px;height:38px}.toki-send{width:42px;height:42px}
  .toki-disclaimer{font-size:11px}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}

/* Keep keyboard controls and attachments readable at small widths. */
.attachment-chip button svg{width:14px;height:14px}
.toki-icon:focus-visible,.toki-compose-icon:focus-visible,.toki-send:focus-visible,.history-main:focus-visible{outline:2px solid var(--tk-wine);outline-offset:3px}

/* v30: retain HSK1 paper/ink palette; frosted surfaces and calmer spacing. */
:root{--tk-muted:#66584e;--tk-wine:#721f24;--tk-wine-deep:#531519}
.toki-shell{background:radial-gradient(ellipse at 90% 0,rgba(114,31,36,.08),transparent 60%),var(--tk-paper)}
.toki-chat,.toki-thread{background:transparent}
.toki-sidebar{background:rgba(238,231,222,.88);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
.toki-topbar{background:rgba(250,247,241,.87);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-top:3px solid var(--tk-wine)}
.toki-rail{background:#eee7de}
.toki-composer-wrap{background:linear-gradient(0deg,rgba(250,247,241,.98) 65%,rgba(250,247,241,.82));padding-bottom:max(14px,env(safe-area-inset-bottom))}
.toki-composer{background:rgba(255,253,249,.9);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-radius:10px}
.toki-message.assistant .message-bubble{line-height:1.85;font-size:16px}
.toki-message.user .message-bubble{background:rgba(240,224,220,.66);border:1px solid rgba(114,31,36,.2);border-radius:10px;box-shadow:none}
.toki-new,.toki-search,.toki-icon,.toki-back,.toki-compose-icon,.toki-send{border-radius:7px}
.toki-send:not(:disabled){background:var(--tk-wine);color:#fffdf9;border-color:var(--tk-wine)}
.toki-send:hover:not(:disabled){background:var(--tk-wine-deep)}
.history-item.active{background:rgba(114,31,36,.08);border-left:2px solid var(--tk-wine)}
.message-tools button:focus-visible,.toki-new:focus-visible,.toki-back:focus-visible,.history-menu:focus-visible{outline:2px solid var(--tk-wine);outline-offset:3px}
.message-file{max-width:100%;overflow-wrap:anywhere}.message-file img{max-height:220px;max-width:100%;object-fit:contain}
.toki-thread{scrollbar-color:#9c7659 transparent;scrollbar-width:thin}
@media(max-width:780px){.toki-sidebar{width:min(240px,calc(100vw - 56px))}.toki-message.assistant .message-bubble{font-size:15px;line-height:1.8}}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){.toki-sidebar{background:#eee7de}.toki-topbar,.toki-composer{background:#faf7f1}}