/* ===== AI Studio design system — Linear / Raycast inspired ===== */
:root{
  --bg:#090A0C;
  --bg-elev:#121418;
  --bg-sheet:#181B20;
  --surface:#1F232B;
  --tx:#F3F4F6;
  --tx2:#9CA3AF;
  --tx3:#6B7280;
  --accent:#5E6AD2;
  --accent-h:#4F5BBE;
  --amber:#F59E0B;
  --danger:#EF4444;
  --line:rgba(255,255,255,0.07);
  --line-strong:rgba(255,255,255,0.09);
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --r:14px;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{
  background:#000;
  font-family:var(--sans);
  color:var(--tx);
  -webkit-font-smoothing:antialiased;
  display:flex;justify-content:center;
}
#app{
  width:100%;max-width:430px;height:100dvh;
  background:var(--bg);
  display:flex;flex-direction:column;
  position:relative;overflow:hidden;
  border-left:1px solid transparent;border-right:1px solid transparent;
}
@media(min-width:431px){
  body{background:radial-gradient(1200px 600px at 50% -10%, #14171d, #050506)}
  #app{height:min(880px,100dvh);border:1px solid var(--line-strong);border-radius:18px;box-shadow:0 40px 120px rgba(0,0,0,.6)}
}
.mono{font-family:var(--mono);font-size:12px;letter-spacing:.2px}
.hidden{display:none!important}

/* icons */
.ic{display:inline-block;vertical-align:-2px;flex:0 0 auto}
.ic svg{width:1em;height:1em;display:block;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.ic.zap svg{fill:var(--amber);stroke:var(--amber);width:.85em;height:.85em}

/* ---- topbar ---- */
.topbar{
  height:52px;flex:0 0 52px;display:flex;align-items:center;gap:8px;
  padding:0 12px;border-bottom:1px solid var(--line);background:var(--bg);
}
.iconbtn{
  width:34px;height:34px;border-radius:10px;border:1px solid var(--line);
  background:transparent;color:var(--tx2);display:grid;place-items:center;cursor:pointer;
  transition:background .12s,color .12s;font-size:16px;
}
.iconbtn:hover{background:var(--surface);color:var(--tx)}
.iconbtn .ic{font-size:17px}
.topbar-title{display:flex;align-items:center;gap:8px;min-width:0;flex:1}
.chat-title{font-size:15px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px}
.mode-badge{
  font-size:11px;font-weight:500;color:var(--tx2);background:var(--surface);
  border:1px solid var(--line);padding:3px 8px;border-radius:999px;white-space:nowrap;
}
.topbar-right{display:flex;align-items:center;gap:8px}
.lang-pill{
  font-size:12px;font-weight:600;letter-spacing:.5px;color:var(--tx2);
  background:transparent;border:1px solid var(--line);border-radius:999px;
  padding:5px 10px;cursor:pointer;font-family:var(--mono);
}
.lang-pill:hover{color:var(--tx);background:var(--surface)}
.balance-pill{
  display:flex;align-items:center;gap:6px;background:var(--surface);
  border:1px solid var(--line);border-radius:999px;padding:6px 12px;cursor:pointer;
  transition:background .12s;font-size:13px;color:var(--tx);
}
.balance-pill:hover{background:#232833}
.balance-pill .bal{font-size:13px}

/* ---- workspace ---- */
.workspace{flex:1;min-height:0;position:relative;display:flex;flex-direction:column}
.chat-scroll{flex:1;overflow-y:auto;overflow-x:hidden;scrollbar-width:thin;scrollbar-color:var(--surface) transparent}
.chat-scroll::-webkit-scrollbar{width:8px}
.chat-scroll::-webkit-scrollbar-thumb{background:var(--surface);border-radius:8px}
.chat-inner{padding:16px 14px 12px;display:flex;flex-direction:column;gap:14px;min-height:100%}

/* empty state */
.empty{margin:auto;text-align:center;padding:24px;display:flex;flex-direction:column;align-items:center;gap:14px}
.empty .ic{font-size:40px;color:var(--tx3)}
.empty .t{font-size:14px;font-weight:600;color:var(--tx2)}
.starters{display:flex;flex-direction:column;gap:8px;width:100%;max-width:320px}
.starter{
  text-align:left;font-size:13px;color:var(--tx2);background:transparent;
  border:1px solid var(--line);border-radius:12px;padding:11px 14px;cursor:pointer;
  transition:background .12s,color .12s;
}
.starter:hover{background:var(--surface);color:var(--tx)}

/* messages */
.msg{display:flex;flex-direction:column;gap:0;max-width:86%}
.msg .who{font-size:11px;color:var(--tx3);margin-bottom:5px;display:flex;gap:8px;align-items:center}
.msg.user{align-self:flex-end;align-items:flex-end}
.msg.user .bubble{
  background:var(--surface);border-radius:18px 18px 4px 18px;padding:11px 14px;
  font-size:14px;line-height:1.45;white-space:pre-wrap;word-break:break-word;
}
.msg.model{align-self:flex-start;align-items:flex-start}
.msg.model .card{
  width:100%;background:var(--bg-elev);border:1px solid var(--line);
  border-radius:18px;overflow:hidden;
}
.msg.model .chead{
  display:flex;align-items:center;gap:8px;padding:10px 14px;border-bottom:1px solid var(--line);
}
.mbadge{font-size:11px;font-weight:500;color:var(--tx2);background:var(--surface);padding:3px 8px;border-radius:999px}
.ctime{font-size:11px;color:var(--tx3)}
.ccost{margin-left:auto;font-family:var(--mono);font-size:11px;color:var(--amber)}
.cbody{padding:14px;font-size:14px;line-height:1.5;white-space:pre-wrap;word-break:break-word}

/* image / media in card */
.media{width:100%;display:block;border:1px solid var(--line);border-radius:12px;background:#000}
.media-wrap{position:relative}
.media-wrap img{width:100%;display:block;border-radius:12px 12px 0 0;background:#000}
.media-actions{display:flex;gap:8px;padding:10px 14px;border-top:1px solid var(--line)}
.chipbtn{
  flex:1;font-size:12px;font-weight:500;color:var(--tx2);background:var(--surface);
  border:1px solid var(--line);border-radius:10px;padding:8px 10px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;gap:6px;transition:background .12s;
}
.chipbtn:hover{background:#242a35;color:var(--tx)}
.skeleton{
  position:relative;overflow:hidden;background:var(--surface);border-radius:12px 12px 0 0;
  min-height:240px;
}
.skeleton::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,transparent 20%,rgba(255,255,255,.06) 50%,transparent 80%);
  animation:shimmer 1.2s infinite;
}
@keyframes shimmer{from{transform:translateX(-100%)}to{transform:translateX(100%)}}

/* video */
video.media{width:100%;border-radius:12px 12px 0 0;aspect-ratio:16/9;background:#000}

/* audio player */
.audio{display:flex;align-items:center;gap:12px;padding:12px 14px}
.audio .play{
  width:40px;height:40px;flex:0 0 40px;border-radius:50%;border:1px solid var(--line);
  background:var(--surface);color:var(--tx);display:grid;place-items:center;cursor:pointer;
}
.audio .play:hover{background:#242a35}
.audio .play .ic{font-size:16px}
.wave{flex:1;display:flex;align-items:center;gap:2px;height:34px;overflow:hidden}
.wave i{flex:1;min-width:2px;background:var(--tx3);border-radius:2px;height:30%;transition:background .1s}
.wave i.on{background:var(--accent)}
.atime{font-family:var(--mono);font-size:11px;color:var(--tx3);white-space:nowrap}
.speed{font-family:var(--mono);font-size:11px;color:var(--tx2);background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:3px 6px;cursor:pointer}

/* status/loading inside a card */
.gen{display:flex;flex-direction:column;gap:10px;padding:14px}
.gen .lbl{font-size:13px;color:var(--tx2)}
.progress{height:4px;border-radius:4px;background:var(--surface);overflow:hidden}
.progress i{display:block;height:100%;width:0;background:var(--accent);transition:width .4s ease}

/* insufficient banner */
.insufficient{
  position:absolute;left:14px;right:14px;bottom:14px;z-index:5;
  background:#2a1716;border:1px solid rgba(239,68,68,.4);color:#fecaca;
  border-radius:12px;padding:10px 12px;font-size:12px;display:flex;gap:8px;align-items:center;
}
.insufficient .ic{color:var(--danger);font-size:14px}

/* ---- composer ---- */
.composer{flex:0 0 auto;border-top:1px solid var(--line);background:var(--bg-elev);padding:8px 12px calc(10px + env(safe-area-inset-bottom))}
.mode-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-bottom:8px}
.mtab{
  display:flex;align-items:center;justify-content:center;gap:6px;font-size:12px;font-weight:500;
  color:var(--tx2);background:transparent;border:1px solid var(--line);border-radius:10px;
  padding:8px 4px;cursor:pointer;transition:background .12s,color .12s,border-color .12s;
}
.mtab .ic{font-size:15px}
.mtab:hover{background:var(--surface);color:var(--tx)}
.mtab.active{background:var(--surface);color:var(--tx);border-color:var(--line-strong);box-shadow:inset 0 0 0 1px rgba(94,106,210,.0)}
.mtab.active .ic{color:var(--accent)}

.parambar{display:flex;gap:8px;margin-bottom:8px}
.pill{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:500;color:var(--tx);
  background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:8px 12px;cursor:pointer;
  white-space:nowrap;flex:0 0 auto;
}
.pill.chev{color:var(--tx3)}
.pill.primary{flex:1;justify-content:flex-start;background:var(--bg-sheet);border-color:var(--line-strong)}
.pills-scroll{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none}
.pills-scroll::-webkit-scrollbar{display:none}
.pill .ic{font-size:14px}

.inputrow{display:flex;align-items:flex-end;gap:8px}
#prompt{
  flex:1;resize:none;background:var(--bg-sheet);border:1px solid var(--line);color:var(--tx);
  border-radius:14px;padding:11px 14px;font-size:14px;line-height:1.4;max-height:140px;font-family:var(--sans);
}
#prompt:focus{outline:none;border-color:var(--line-strong)}
#prompt::placeholder{color:var(--tx3)}
.send{
  flex:0 0 auto;display:flex;align-items:center;gap:7px;cursor:pointer;border:none;
  background:var(--accent);color:#fff;font-size:13px;font-weight:500;border-radius:12px;padding:11px 14px;
  transition:background .12s,opacity .12s;font-family:var(--sans);
}
.send .ic{font-size:16px}
.send:hover{background:var(--accent-h)}
.send:disabled{background:#3a2a2a;color:#a98080;cursor:not-allowed}
.send:disabled .ic{color:#a98080}

/* ---- backdrop ---- */
.backdrop{position:absolute;inset:0;background:rgba(0,0,0,.5);backdrop-filter:blur(2px);z-index:20}

/* ---- drawer ---- */
.drawer{
  position:absolute;top:0;bottom:0;left:0;width:78%;max-width:300px;z-index:21;
  background:var(--bg-sheet);border-right:1px solid var(--line);
  display:flex;flex-direction:column;transform:translateX(-100%);transition:transform .22s ease;
  padding:14px;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;font-size:14px;font-weight:600;margin-bottom:12px}
.new-session{
  display:flex;align-items:center;justify-content:center;gap:8px;width:100%;font-size:13px;font-weight:500;
  color:var(--tx);background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:11px;cursor:pointer;
  margin-bottom:14px;transition:background .12s;
}
.new-session:hover{background:#242a35}
.drawer-list{overflow-y:auto;display:flex;flex-direction:column;gap:6px}
.sess-group{font-size:11px;font-weight:600;color:var(--tx3);text-transform:uppercase;letter-spacing:.5px;padding:8px 6px 4px}
.sess{
  display:flex;align-items:center;gap:10px;padding:10px;border-radius:12px;cursor:pointer;
  border:1px solid transparent;transition:background .12s;position:relative;
}
.sess:hover{background:var(--surface)}
.sess.active{background:var(--surface);border-color:var(--line)}
.sess .ic{font-size:16px;color:var(--tx2);flex:0 0 auto}
.sess .nm{flex:1;font-size:13px;color:var(--tx);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sess .del{opacity:0;font-size:15px;color:var(--tx3);background:none;border:none;cursor:pointer;display:grid;place-items:center}
.sess:hover .del{opacity:1}
.sess .del:hover{color:var(--danger)}

/* ---- sheet ---- */
.sheet{
  position:absolute;left:0;right:0;bottom:0;z-index:21;background:var(--bg-sheet);
  border-top:1px solid var(--line);border-radius:18px 18px 0 0;
  transform:translateY(100%);transition:transform .22s ease;padding-bottom:env(safe-area-inset-bottom);
  max-height:70%;display:flex;flex-direction:column;
}
.sheet.open{transform:translateY(0)}
.sheet-grip{width:36px;height:4px;border-radius:4px;background:var(--surface);margin:10px auto 4px}
.sheet-head{display:flex;align-items:center;justify-content:space-between;font-size:14px;font-weight:600;padding:6px 16px 12px}
.sheet-list{overflow-y:auto;padding:0 10px 14px;display:flex;flex-direction:column;gap:8px}
.model{
  display:flex;align-items:center;gap:12px;background:var(--bg-elev);border:1px solid var(--line);
  border-radius:14px;padding:12px;cursor:pointer;transition:border-color .12s,background .12s;
}
.model:hover{background:#15181d;border-color:var(--line-strong)}
.model.sel{border-color:var(--accent);background:#14161d}
.model .mi{flex:1;min-width:0}
.model .mn{font-size:13px;font-weight:500;color:var(--tx)}
.model .mt{font-size:11px;color:var(--tx2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}
.model .price{font-family:var(--mono);font-size:12px;color:var(--amber);display:flex;align-items:center;gap:3px;flex:0 0 auto}
.model .price .ic{font-size:12px}

/* ---- modal ---- */
.modal{position:absolute;inset:0;z-index:22;display:grid;place-items:center}
.modal-card{
  width:82%;max-width:320px;background:var(--bg-sheet);border:1px solid var(--line);
  border-radius:18px;padding:20px;display:flex;flex-direction:column;gap:12px;
  animation:pop .18s ease;
}
@keyframes pop{from{transform:scale(.96);opacity:0}to{transform:scale(1);opacity:1}}
.modal-title{font-size:15px;font-weight:600}
.modal-sub{font-size:12px;color:var(--tx2)}
.modal-balance{display:flex;align-items:center;gap:8px;font-size:22px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px;justify-content:center}
.modal-balance .ic{font-size:18px}
.btn-primary{font-size:13px;font-weight:500;color:#fff;background:var(--accent);border:none;border-radius:12px;padding:12px;cursor:pointer}
.btn-primary:hover{background:var(--accent-h)}
.btn-ghost{font-size:13px;color:var(--tx2);background:transparent;border:none;padding:8px;cursor:pointer}
.btn-ghost:hover{color:var(--tx)}

/* ---- toast ---- */
.toast{
  position:absolute;bottom:calc(14px + env(safe-area-inset-bottom));left:50%;transform:translate(-50%,10px);
  background:var(--bg-sheet);border:1px solid var(--line-strong);color:var(--tx);
  font-size:13px;padding:10px 16px;border-radius:12px;z-index:40;opacity:0;transition:opacity .2s,transform .2s;
  box-shadow:0 10px 30px rgba(0,0,0,.5);max-width:80%;text-align:center;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---- loading ---- */
.loading{position:absolute;inset:0;z-index:30;background:rgba(9,10,12,.7);backdrop-filter:blur(3px);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px}
.loading .lt{font-size:13px;color:var(--tx2)}
.spinner{width:26px;height:26px;border:2px solid var(--surface);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}