.gas-app{
  --gas-accent:#0f9f83;
  --gas-accent-2:#087f6b;
  --gas-bg:#ffffff;
  --gas-panel:#f5f8f7;
  --gas-text:#182522;
  --gas-muted:#72817c;
  --gas-border:#e2e9e6;
  position:relative;
  display:grid;
  grid-template-columns:220px minmax(0,1fr);
  width:100%;
  min-height:780px;
  overflow:hidden;
  box-sizing:border-box;
  border:1px solid var(--gas-border);
  border-radius:24px;
  background:linear-gradient(135deg,#fff 0%,#f3faf7 100%);
  color:var(--gas-text);
  font-family:inherit;
  box-shadow:0 18px 55px rgba(26,74,61,.10);
}
.gas-app *{box-sizing:border-box}
.gas-app.dark{
  --gas-bg:#111b18;
  --gas-panel:#182621;
  --gas-text:#edf7f2;
  --gas-muted:#9eb2a9;
  --gas-border:#2b4037;
  background:linear-gradient(135deg,#111b18,#172820);
}
.gas-sidebar{
  display:flex;
  flex-direction:column;
  min-width:0;
  padding:18px 14px;
  background:rgba(245,248,247,.88);
  border-right:1px solid var(--gas-border);
}
.gas-app.dark .gas-sidebar{background:rgba(24,38,33,.88)}
.gas-new-chat{
  width:100%;
  border:0;
  border-radius:13px;
  padding:13px 15px;
  background:linear-gradient(135deg,#129d82,#087f6b);
  color:#fff;
  font:inherit;
  font-weight:700;
  cursor:pointer;
  box-shadow:0 7px 18px rgba(8,127,107,.20);
}
.gas-history{
  display:flex;
  flex-direction:column;
  gap:6px;
  margin-top:18px;
  overflow:auto;
}
.gas-history button{
  width:100%;
  padding:10px 12px;
  border:1px solid transparent;
  border-radius:10px;
  background:transparent;
  color:var(--gas-text);
  text-align:left;
  font:inherit;
  font-size:13px;
  cursor:pointer;
}
.gas-history button:hover{background:rgba(15,159,131,.10);border-color:var(--gas-border)}
.gas-sidebar-bottom{
  margin-top:auto;
  padding:12px 5px 2px;
  color:var(--gas-muted);
  font-size:11px;
  line-height:1.5;
}
.gas-main{
  position:relative;
  display:flex;
  flex-direction:column;
  min-width:0;
  min-height:780px;
  padding-bottom:145px;
}
.gas-topbar{
  display:flex;
  align-items:center;
  gap:12px;
  min-height:68px;
  padding:14px 22px;
  border-bottom:1px solid rgba(226,233,230,.75);
}
.gas-app.dark .gas-topbar{border-bottom-color:var(--gas-border)}
.gas-brand{font-size:19px;letter-spacing:-.03em}
.gas-menu,.gas-theme{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  border:1px solid var(--gas-border);
  border-radius:11px;
  background:var(--gas-bg);
  color:var(--gas-text);
  cursor:pointer;
  font-size:20px;
}
.gas-menu{display:none}
.gas-theme{margin-left:auto}
.gas-messages{
  flex:1;
  min-width:0;
  overflow:auto;
  padding:34px 28px 20px;
}
.gas-welcome{
  max-width:1000px;
  margin:65px auto 0;
  text-align:center;
}
.gas-welcome h1{
  margin:0 0 12px;
  font-size:clamp(28px,4vw,46px);
  line-height:1.1;
  letter-spacing:-.055em;
  color:var(--gas-text);
}
.gas-welcome p{margin:0;color:var(--gas-muted);font-size:15px}
.gas-message{
  display:flex;
  align-items:flex-start;
  gap:13px;
  max-width:1180px;
  margin:0 auto 24px;
  animation:gasIn .22s ease both;
}
.gas-avatar{
  flex:0 0 34px;
  width:34px;
  height:34px;
  display:grid;
  place-items:center;
  border-radius:11px;
  background:var(--gas-panel);
  border:1px solid var(--gas-border);
  color:var(--gas-accent-2);
  font-size:13px;
  font-weight:700;
}
.gas-content{
  min-width:0;
  max-width:calc(100% - 48px);
  padding:9px 13px;
  border-radius:15px;
  color:var(--gas-text);
  line-height:1.65;
  overflow-wrap:anywhere;
}
.gas-message:first-child .gas-content{background:var(--gas-panel)}
.gas-content pre{
  max-width:100%;
  overflow:auto;
  padding:14px;
  border-radius:12px;
  background:#17221f;
  color:#effaf5;
}
.gas-content code{font-size:.92em}
.gas-composer{
  position:absolute;
  left:50%;
  bottom:26px;
  transform:translateX(-50%);
  width:calc(100% - 42px);
  z-index:3;
  padding:14px 16px 10px;
  border:1px solid var(--gas-border);
  border-radius:22px;
  background:rgba(255,255,255,.94);
  box-shadow:0 12px 35px rgba(22,60,48,.13);
  backdrop-filter:blur(14px);
}
.gas-app.dark .gas-composer{background:rgba(17,27,24,.94)}
.gas-composer-main{display:flex;align-items:center;gap:10px;width:100%}
.gas-composer textarea{
  flex:1;
  min-width:0;
  min-height:38px;
  max-height:160px;
  resize:none;
  border:0;
  outline:0;
  background:transparent;
  color:var(--gas-text);
  font:inherit;
  font-size:16px;
  line-height:1.5;
  padding:5px 0;
}
.gas-composer textarea::placeholder{color:var(--gas-muted)}
.gas-composer-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:8px;
}
.gas-limit{color:var(--gas-muted);font-size:11px}
.gas-send{
  flex:0 0 42px;
  width:42px;
  height:42px;
  display:grid;
  place-items:center;
  border:0;
  border-radius:14px;
  background:linear-gradient(135deg,#19b995,#087f6b);
  color:#fff;
  font-size:24px;
  line-height:1;
  cursor:pointer;
  box-shadow:0 6px 16px rgba(8,127,107,.25);
  transition:transform .18s ease,box-shadow .18s ease,opacity .18s ease;
}
.gas-send:hover{transform:translateY(-2px);box-shadow:0 9px 22px rgba(8,127,107,.32)}
.gas-send:disabled{opacity:.45;cursor:wait;transform:none}
.gas-disclaimer{
  position:absolute;
  bottom:5px;
  left:0;
  width:100%;
  margin:0;
  text-align:center;
  color:var(--gas-muted);
  font-size:11px;
  pointer-events:none;
}
@keyframes gasIn{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}
@media(max-width:760px){
  .gas-app{grid-template-columns:1fr;min-height:650px;border-radius:18px}
  .gas-sidebar{
    position:absolute;
    z-index:10;
    top:0;bottom:0;left:0;
    width:min(280px,86%);
    transform:translateX(-105%);
    transition:transform .2s ease;
    box-shadow:12px 0 35px rgba(0,0,0,.12);
  }
  .gas-sidebar.open{transform:translateX(0)}
  .gas-menu{display:grid}
  .gas-main{min-height:650px;padding-bottom:140px}
  .gas-topbar{padding:12px 14px}
  .gas-messages{padding:24px 14px}
  .gas-welcome{margin-top:70px}
  .gas-welcome h1{font-size:31px}
  .gas-composer{bottom:24px;width:calc(100% - 22px);padding:12px}
  .gas-disclaimer{bottom:5px;font-size:10px;padding:0 10px}
}

.gas-welcome-badge{display:inline-flex;padding:7px 12px;border:1px solid var(--gas-border);border-radius:999px;background:var(--gas-panel);color:var(--gas-accent-2);font-size:12px;font-weight:700;margin-bottom:18px}
.gas-suggestions{display:flex;flex-wrap:wrap;justify-content:center;gap:9px;margin:28px auto 0;max-width:760px}
.gas-suggestions button,.gas-message-tools button{border:1px solid var(--gas-border);background:var(--gas-bg);color:var(--gas-text);border-radius:10px;padding:9px 12px;font:inherit;font-size:12px;cursor:pointer}
.gas-suggestions button:hover,.gas-message-tools button:hover{border-color:var(--gas-accent);background:var(--gas-panel)}
.gas-message-tools{display:flex;gap:7px;margin-top:10px}
.gas-message.user .gas-content{background:var(--gas-panel)}
.gas-message.model .gas-content{background:transparent}
@media(max-width:760px){.gas-suggestions{gap:7px}.gas-suggestions button{font-size:11px;padding:8px 10px}}