:root{
  --bg:#0d0f14; --bg2:#12151c; --surface:#171b23; --surface2:#1e232d; --line:rgba(255,255,255,.07);
  --text:#ece8e3; --muted:#8e939d; --accent:#f0a878; --accent2:#e07a8f; --glow:rgba(240,168,120,.28);
  --user:#232937; --danger:#ef6b6b; --radius:18px; --side:280px;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Text","Inter","Segoe UI",Roboto,sans-serif;
}
@media (prefers-color-scheme: light){
  :root{ --bg:#f7f4ef; --bg2:#efebe4; --surface:#ffffff; --surface2:#f3efe9; --line:rgba(40,30,20,.09);
    --text:#1f1b17; --muted:#7a736b; --accent:#c9693d; --accent2:#b8526a; --glow:rgba(201,105,61,.18); --user:#ebe5dc; }
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:var(--font);font-size:15px;line-height:1.55}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea{font:inherit;color:var(--text)}
.hidden{display:none!important}
.muted{color:var(--muted)} .small{font-size:13px}
svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* logo */
.logo-mark{width:44px;height:44px;border-radius:50%;position:relative;
  background:radial-gradient(circle at 50% 50%,var(--bg) 0 34%,transparent 35%),conic-gradient(from 200deg,var(--accent),var(--accent2),var(--accent));
  box-shadow:0 0 28px var(--glow);animation:breathe 6s ease-in-out infinite}
.logo-mark::after{content:"";position:absolute;inset:40%;border-radius:50%;background:var(--accent)}
.logo-mark.big{width:58px;height:58px}
@keyframes breathe{0%,100%{box-shadow:0 0 22px var(--glow)}50%{box-shadow:0 0 42px var(--glow)}}

/* login */
.login{min-height:100dvh;display:grid;place-items:center;padding:24px;
  background:radial-gradient(600px 400px at 50% 20%,var(--glow),transparent 70%),var(--bg)}
.login-card{width:100%;max-width:340px;display:flex;flex-direction:column;align-items:center;gap:12px}
.login-card h1{margin:8px 0 0;font-size:28px;letter-spacing:.5px}
.login-card p{margin:0 0 12px}
.login-card input{width:100%;padding:14px 16px;border-radius:14px;border:1px solid var(--line);background:var(--surface);font-size:16px;outline:none;transition:border-color .2s,box-shadow .2s}
.login-card input:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--glow)}
.btn-primary{padding:13px 20px;border-radius:14px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;font-weight:600;box-shadow:0 6px 24px var(--glow);transition:transform .15s,opacity .2s}
.login-card .btn-primary{width:100%;margin-top:4px}
.btn-primary:active{transform:scale(.98)}
.err{color:var(--danger);min-height:20px;font-size:14px;margin:0}

/* layout */
.app{display:flex;height:100dvh;overflow:hidden}
.side{width:var(--side);flex:none;background:var(--bg2);border-right:1px solid var(--line);display:flex;flex-direction:column;
  padding:calc(12px + env(safe-area-inset-top)) 12px calc(12px + env(safe-area-inset-bottom))}
.side-top{display:flex;flex-direction:column;gap:10px;padding-bottom:8px}
.new-btn{display:flex;align-items:center;gap:10px;padding:11px 14px;border-radius:14px;background:var(--surface);border:1px solid var(--line);font-weight:600;transition:border-color .2s,box-shadow .2s}
.new-btn:hover{border-color:var(--accent);box-shadow:0 0 18px var(--glow)}
.plus{color:var(--accent);font-size:20px;line-height:1}
.search{padding:9px 12px;border-radius:12px;border:1px solid var(--line);background:transparent;outline:none;font-size:16px}
.search:focus{border-color:var(--accent)}
.conv-list{flex:1;overflow-y:auto;margin:4px -4px;padding:0 4px;-webkit-overflow-scrolling:touch}
.group{font-size:12px;color:var(--muted);margin:14px 10px 6px;text-transform:uppercase;letter-spacing:.6px}
.conv{display:flex;align-items:center;border-radius:12px;transition:background .15s}
.conv a{flex:1;min-width:0;padding:9px 10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--text);text-decoration:none}
.conv:hover,.conv.active{background:var(--surface)}
.conv.active a{color:var(--accent)}
.conv .del{opacity:0;padding:6px 8px;color:var(--muted);font-size:13px;white-space:nowrap}
.conv:hover .del,.conv.active .del{opacity:1}
.conv .del.confirm{opacity:1;color:var(--danger);font-weight:600}
.side-bottom{border-top:1px solid var(--line);padding-top:8px;display:flex;flex-direction:column}
.side-link{text-align:left;padding:10px;border-radius:10px}
.side-link:hover{background:var(--surface)}
.scrim{display:none}

.main{flex:1;min-width:0;display:flex;flex-direction:column;position:relative;
  background:radial-gradient(900px 500px at 50% -10%,var(--glow),transparent 60%),var(--bg)}
.topbar{display:flex;align-items:center;gap:8px;padding:calc(8px + env(safe-area-inset-top)) 12px 8px;border-bottom:1px solid transparent}
.topbar #menuBtn{display:none}
.conv-title{flex:1;text-align:center;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;opacity:.9}
.icon-btn{width:40px;height:40px;display:grid;place-items:center;border-radius:12px;color:var(--muted);transition:color .2s,background .2s;flex:none}
.icon-btn:hover{color:var(--text);background:var(--surface)}

.scroller{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain}
.msgs{max-width:760px;margin:0 auto;padding:12px 18px 24px;display:flex;flex-direction:column;gap:18px}
.empty{max-width:560px;margin:0 auto;padding:12vh 20px 20px;display:flex;flex-direction:column;align-items:center;text-align:center}
.empty h2{margin:18px 0 4px;font-size:24px;font-weight:600}
.empty p{margin:0}
.chips{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:26px}
.chip{padding:9px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);font-size:14px;transition:border-color .2s,box-shadow .2s,transform .15s}
.chip:hover{border-color:var(--accent);box-shadow:0 0 16px var(--glow)}
.chip:active{transform:scale(.97)}

.msg{animation:rise .35s ease both}
@keyframes rise{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.msg.user{align-self:flex-end;max-width:85%}
.msg.user .bubble{background:var(--user);padding:10px 15px;border-radius:20px 20px 6px 20px;white-space:pre-wrap;word-wrap:break-word}
.msg.user .imgs{display:flex;gap:6px;justify-content:flex-end;margin-bottom:6px;flex-wrap:wrap}
.msg.user .imgs img{width:120px;height:120px;object-fit:cover;border-radius:14px;border:1px solid var(--line)}
.msg.bot .md{word-wrap:break-word;overflow-wrap:anywhere}
.md p{margin:0 0 .75em} .md p:last-child{margin-bottom:0}
.md ul,.md ol{margin:0 0 .75em;padding-left:1.3em} .md li{margin:.2em 0}
.md h1,.md h2,.md h3{font-size:1.05em;margin:1em 0 .4em}
.md a{color:var(--accent)}
.md code{background:var(--surface2);padding:1px 5px;border-radius:6px;font-size:.9em}
.md pre{background:var(--surface);border:1px solid var(--line);padding:12px;border-radius:12px;overflow-x:auto}
.md pre code{background:none;padding:0}
.md table{border-collapse:collapse;display:block;overflow-x:auto;margin:0 0 .75em}
.md th,.md td{border:1px solid var(--line);padding:6px 10px;text-align:left}
.md blockquote{margin:0 0 .75em;padding-left:12px;border-left:3px solid var(--accent);color:var(--muted)}
.meta{display:flex;align-items:center;gap:10px;margin-top:8px;font-size:12px;color:var(--muted);min-height:18px}
.meta .route{display:inline-flex;align-items:center;gap:6px}
.meta .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent)}
.meta button{color:var(--muted);font-size:12px;padding:2px 4px}
.meta button:hover{color:var(--text)}
.thinking{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:14px}
.pulse{display:flex;gap:4px}
.pulse i{width:7px;height:7px;border-radius:50%;background:var(--accent);opacity:.3;animation:blink 1.2s infinite}
.pulse i:nth-child(2){animation-delay:.2s} .pulse i:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,100%{opacity:.25;transform:scale(.85)}40%{opacity:1;transform:scale(1)}}
.error-note{color:var(--danger);font-size:14px}
.caret::after{content:"";display:inline-block;width:7px;height:1em;margin-left:2px;vertical-align:-2px;background:var(--accent);border-radius:2px;animation:blink 1s infinite}

.composer-wrap{padding:8px 14px calc(10px + env(safe-area-inset-bottom));max-width:788px;width:100%;margin:0 auto}
.previews{display:flex;gap:8px;flex-wrap:wrap}
.previews:not(:empty){margin-bottom:8px}
.prev{position:relative}
.prev img{width:64px;height:64px;object-fit:cover;border-radius:12px;border:1px solid var(--line)}
.prev button{position:absolute;top:-6px;right:-6px;width:22px;height:22px;border-radius:50%;background:var(--surface2);border:1px solid var(--line);font-size:13px;line-height:1}
.composer{display:flex;align-items:flex-end;gap:6px;padding:6px;border-radius:24px;background:var(--surface);border:1px solid var(--line);transition:border-color .25s,box-shadow .25s}
.composer:focus-within{border-color:rgba(240,168,120,.45);box-shadow:0 0 0 4px var(--glow),0 8px 30px rgba(0,0,0,.25)}
.composer textarea{flex:1;resize:none;border:0;outline:none;background:transparent;padding:9px 4px;max-height:40vh;font-size:16px;line-height:1.45}
.send-btn{width:40px;height:40px;flex:none;border-radius:50%;display:grid;place-items:center;color:#fff;
  background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 4px 16px var(--glow);transition:opacity .2s,transform .15s}
.send-btn:disabled{opacity:.35;box-shadow:none}
.send-btn:active{transform:scale(.94)}
.send-btn .i-stop{display:none;fill:currentColor;stroke:none}
.send-btn.stop .i-send{display:none} .send-btn.stop .i-stop{display:block}
.hint{text-align:center;font-size:11.5px;color:var(--muted);margin-top:6px;opacity:.8}

.modal{position:fixed;inset:0;background:rgba(0,0,0,.5);display:grid;place-items:center;z-index:50;padding:16px;animation:fade .2s}
@keyframes fade{from{opacity:0}}
.modal-card{width:100%;max-width:620px;max-height:90dvh;display:flex;flex-direction:column;gap:10px;background:var(--bg2);border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:0 20px 60px rgba(0,0,0,.4)}
.modal-head{display:flex;align-items:center;justify-content:space-between}
.modal-head h3{margin:0;font-size:18px}
.modal-card p{margin:0}
.tabs{display:flex;gap:6px;overflow-x:auto;padding-bottom:2px}
.tab{padding:7px 12px;border-radius:999px;border:1px solid var(--line);white-space:nowrap;font-size:14px}
.tab.active{border-color:var(--accent);color:var(--accent);box-shadow:0 0 12px var(--glow)}
.vault-text{min-height:260px;flex:1;resize:vertical;border-radius:14px;border:1px solid var(--line);background:var(--surface);padding:12px;outline:none;font-size:15px;line-height:1.5}
.vault-text:focus{border-color:var(--accent)}
.modal-foot{display:flex;align-items:center;justify-content:space-between;gap:10px}

@media (max-width:820px){
  .side{position:fixed;inset:0 auto 0 0;z-index:40;width:min(84vw,320px);transform:translateX(-102%);transition:transform .28s cubic-bezier(.2,.8,.2,1)}
  .app.drawer .side{transform:none;box-shadow:20px 0 60px rgba(0,0,0,.35)}
  .scrim{display:block;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:30;opacity:0;pointer-events:none;transition:opacity .25s}
  .app.drawer .scrim{opacity:1;pointer-events:auto}
  .topbar #menuBtn{display:grid}
  .conv .del{opacity:1}
  .msgs{padding:8px 16px 20px}
  .empty{padding-top:8vh}
}
@media (min-width:821px){ .topbar #newBtnTop{visibility:hidden} html,body{font-size:14.5px} }

.app{height:var(--vh,100dvh)}
.modal{grid-template-columns:minmax(0,620px);justify-content:center}
.modal-card{min-width:0}
.tabs{min-width:0;max-width:100%}
.src-btn{opacity:.4;transition:opacity .2s}
.src-btn:hover,.src-btn.open{opacity:.9}
.sources{margin:8px 0 0;padding-left:1.3em;font-size:13px;color:var(--muted);animation:rise .25s ease both}
.sources li{margin:3px 0}
.sources a{color:var(--muted);text-decoration:none;border-bottom:1px solid var(--line)}
.sources a:hover{color:var(--accent)}
.mic.rec{color:#fff;background:var(--danger);box-shadow:0 0 0 0 rgba(239,107,107,.6);animation:micpulse 1.4s infinite}
.mic.busy{opacity:.45;pointer-events:none}
@keyframes micpulse{0%{box-shadow:0 0 0 0 rgba(239,107,107,.55)}70%{box-shadow:0 0 0 12px rgba(239,107,107,0)}100%{box-shadow:0 0 0 0 rgba(239,107,107,0)}}
.hint.flash{color:var(--accent);opacity:1}
.speak-btn{opacity:.55}
.speak-btn.open{opacity:1;color:var(--accent)!important}