@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800;900&display=swap');

:root{
  --dt-navy-0:#020612;
  --dt-navy-1:#050b1d;
  --dt-teal-0:#00c1b5;
  --dt-teal-1:#13e0d1;
  --dt-white:rgba(255,255,255,0.92);
  --dt-muted:rgba(255,255,255,0.70);
  --dt-dim:rgba(255,255,255,0.55);
  --dt-border:rgba(255,255,255,0.10);
  --dt-glow:rgba(0,193,181,0.15);
  --dt-radius:22px;
  --dt-shadow: 0 0 50px var(--dt-glow);
  --dt-blur: 40px;
}

.dt-ai2-root{
  position:relative;
  min-height: 680px;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--dt-white);
  overflow:hidden;
  border-radius: 28px;
}

.dt-ai2-bg{ position:absolute; inset:0; overflow:hidden; }

.dt-ai2-bg:before{
  content:"";
  position:absolute; inset:-20%;
  background:
    radial-gradient(1200px 800px at 20% 20%, rgba(0,193,181,0.18), transparent 60%),
    radial-gradient(1000px 700px at 80% 30%, rgba(19,224,209,0.14), transparent 55%),
    radial-gradient(900px 700px at 60% 90%, rgba(0,193,181,0.12), transparent 60%),
    linear-gradient(135deg, var(--dt-navy-0), var(--dt-navy-1) 45%, rgba(0,193,181,0.06) 100%);
  animation: dtGradient 14s ease-in-out infinite alternate;
  transform: translateZ(0);
}

@keyframes dtGradient{
  0% { transform: scale(1.03) translate(-1%, -1%); filter: saturate(1.0); }
  50% { transform: scale(1.08) translate(1.5%, -0.5%); filter: saturate(1.15); }
  100% { transform: scale(1.04) translate(-0.5%, 1.5%); filter: saturate(1.05); }
}

.dt-ai2-aura{
  position:absolute;
  width: 540px; height: 540px;
  left: 50%; top: 40%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle at 50% 50%, rgba(0,193,181,0.20), rgba(0,193,181,0.06) 55%, transparent 70%);
  filter: blur(18px);
  opacity: 0.75;
  animation: dtAura 6.5s ease-in-out infinite;
  pointer-events:none;
}

.dt-ai2-root.dt-ai2-thinking .dt-ai2-aura{
  animation-duration: 4.8s;
  opacity: 0.92;
}

@keyframes dtAura{
  0%, 100% { transform: translate(-50%, -50%) scale(0.98); }
  50% { transform: translate(-50%, -50%) scale(1.06); }
}

.dt-ai2-grid{
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 50% 45%, rgba(0,0,0,0.9), transparent 68%);
  opacity: 0.18;
  pointer-events:none;
}

.dt-ai2-noise{
  position:absolute; inset:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.35'/%3E%3C/svg%3E");
  opacity:0.08;
  mix-blend-mode: overlay;
  pointer-events:none;
}

.dt-ai2-shell{ position:relative; padding: 26px; }

.dt-ai2-card{
  border: 1px solid var(--dt-border);
  border-radius: var(--dt-radius);
  background: rgba(8, 16, 34, 0.52);
  backdrop-filter: blur(var(--dt-blur));
  -webkit-backdrop-filter: blur(var(--dt-blur));
  box-shadow: var(--dt-shadow);
}

.dt-ai2-splash{
  padding: 44px 36px;
  text-align:center;
  animation: dtSplashIn 1.1s ease-out both;
}
@keyframes dtSplashIn{
  from { opacity:0; transform: translateY(16px) scale(0.98); }
  to   { opacity:1; transform: translateY(0) scale(1); }
}

.dt-ai2-splash-title{
  font-weight: 900;
  letter-spacing: 0.04em;
  font-size: clamp(28px, 4.2vw, 46px);
  line-height: 1.08;
  background: linear-gradient(90deg, rgba(255,255,255,0.95), rgba(19,224,209,0.92));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: dtTitle 1.3s cubic-bezier(.2,.9,.2,1) both;
}
@keyframes dtTitle{
  0%{ opacity:0; transform: scale(0.96); letter-spacing: 0.22em; filter: blur(2px); }
  60%{ opacity:1; transform: scale(1.02); letter-spacing: 0.05em; filter: blur(0px); }
  100%{ opacity:1; transform: scale(1.00); letter-spacing: 0.04em; }
}
.dt-ai2-splash-sub{ margin-top: 12px; color: var(--dt-muted); font-weight: 400; letter-spacing: 0.02em; }

.dt-ai2-splash.is-out{ animation: dtSplashOut .6s ease-in both; }
@keyframes dtSplashOut{
  to { opacity:0; transform: translateY(-10px) scale(0.985); filter: blur(2px); }
}

.dt-ai2-app{ padding: 22px; opacity: 0; transform: translateY(12px); }
.dt-ai2-app.is-in{ animation: dtAppIn .7s ease-out both; }
@keyframes dtAppIn{ to { opacity:1; transform: translateY(0); } }

.dt-ai2-header{
  display:flex; align-items:center; justify-content:space-between; gap: 12px;
  padding-bottom: 14px; border-bottom: 1px solid rgba(255,255,255,0.08);
}

.dt-ai2-brand{ display:flex; align-items:center; gap: 12px; }

.dt-ai2-logo{
  width: 44px; height: 44px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 0 34px rgba(0,193,181,0.22);
  background: radial-gradient(circle at 30% 30%, rgba(19,224,209,0.30), rgba(0,193,181,0.05));
  backdrop-filter: blur(18px);
  display:flex; align-items:center; justify-content:center;
}
.dt-ai2-logo-dot{
  width: 10px; height: 10px; border-radius: 999px;
  background: rgba(255,255,255,0.92);
  box-shadow: 0 0 18px rgba(19,224,209,0.65);
}

.dt-ai2-brandname{ font-weight: 900; letter-spacing: 0.02em; font-size: 15px; line-height: 1; }
.dt-ai2-brandrole{ margin-top: 4px; color: var(--dt-dim); font-size: 12px; letter-spacing: 0.02em; }

.dt-ai2-status-pill{
  display:inline-flex; align-items:center; gap: 10px;
  padding: 8px 12px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.06);
}
.dt-ai2-status-led{
  width: 7px; height: 7px; border-radius: 999px;
  background: rgba(19,224,209,0.9);
  box-shadow: 0 0 14px rgba(19,224,209,0.65);
}
.dt-ai2-status-pill.is-thinking .dt-ai2-status-led{ animation: dtLed 1.1s ease-in-out infinite; }
@keyframes dtLed{ 0%,100%{ transform: scale(0.9); opacity:0.7; } 50%{ transform: scale(1.25); opacity:1; } }
.dt-ai2-status-text{ color: var(--dt-muted); font-size: 12px; letter-spacing: 0.02em; }

.dt-ai2-stage{
  margin-top: 16px; overflow:hidden;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(0,0,0,0.08);
}
.dt-ai2-rail{
  display:flex; width: 400%;
  transform: translateX(calc(var(--dt-ai2-slide, 0) * -25%));
  transition: transform 520ms cubic-bezier(.22,.9,.2,1);
}
.dt-ai2-panel{ width: 25%; padding: 18px; min-height: 420px; }

.dt-ai2-msg{ display:flex; margin: 10px 0; }
.dt-ai2-msg-agent{ justify-content:flex-start; }
.dt-ai2-msg-user{ justify-content:flex-end; }

.dt-ai2-bubble{
  max-width: 78%;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.06);
  box-shadow: 0 0 40px rgba(0,193,181,0.08);
}
.dt-ai2-msg-user .dt-ai2-bubble{
  background: rgba(0,193,181,0.10);
  box-shadow: 0 0 40px rgba(0,193,181,0.16);
}
.dt-ai2-text{ font-size: 14px; line-height: 1.45; color: var(--dt-white); letter-spacing: 0.01em; }

.dt-ai2-block{
  margin: 14px 0 10px 0; padding: 14px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.04);
  box-shadow: 0 0 50px rgba(0,193,181,0.10);
}
.dt-ai2-h2{ font-weight: 800; letter-spacing: 0.01em; font-size: 14px; }
.dt-ai2-hint{ margin-top: 6px; color: var(--dt-muted); font-size: 12px; }

.dt-ai2-btnrow{ display:flex; flex-wrap:wrap; gap: 10px; margin-top: 12px; }

.dt-ai2-btn{
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 14px;
  padding: 10px 12px;
  font-size: 13px;
  letter-spacing: 0.01em;
  color: var(--dt-white);
  background: rgba(255,255,255,0.06);
  cursor:pointer;
  transition: transform .18s ease, background .18s ease, box-shadow .18s ease, border-color .18s ease;
  position:relative;
  overflow:hidden;
}
.dt-ai2-btn:hover{
  transform: translateY(-1px);
  border-color: rgba(19,224,209,0.28);
  box-shadow: 0 0 34px rgba(0,193,181,0.18);
}
.dt-ai2-btn:disabled{ opacity:0.55; cursor:not-allowed; transform:none; }

.dt-ai2-btn-primary{
  background: linear-gradient(135deg, rgba(19,224,209,0.22), rgba(0,193,181,0.10));
  border-color: rgba(19,224,209,0.32);
}
.dt-ai2-btn-ghost{ background: rgba(255,255,255,0.05); }
.dt-ai2-btn-glass{
  flex: 1 1 160px;
  text-align:center;
  background: rgba(255,255,255,0.05);
}

.dt-ai2-btn.is-busy:after{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
  animation: dtShimmer 1.2s linear infinite;
}
@keyframes dtShimmer{ 0%{ transform: translateX(-100%);} 100%{ transform: translateX(100%);} }

.dt-ai2-field{ margin-top: 12px; }
.dt-ai2-label{ color: var(--dt-muted); font-size: 12px; margin-bottom: 8px; }

.dt-ai2-input, .dt-ai2-select{
  width: 100%;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(0,0,0,0.16);
  color: var(--dt-white);
  outline: none;
  transition: border-color .18s ease, box-shadow .18s ease;
}
.dt-ai2-input:focus, .dt-ai2-select:focus{
  border-color: rgba(19,224,209,0.35);
  box-shadow: 0 0 30px rgba(0,193,181,0.18);
}

.dt-ai2-summary{
  margin-top: 12px; padding: 12px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.04);
}
.dt-ai2-row{
  display:flex; justify-content:space-between; gap: 14px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.dt-ai2-row:last-child{ border-bottom:none; }
.dt-ai2-k{ color: var(--dt-muted); font-size: 12px; }
.dt-ai2-v{ color: var(--dt-white); font-size: 13px; text-align:right; }

.dt-ai2-foot{ margin-top: 14px; padding-top: 12px; border-top: 1px solid rgba(255,255,255,0.08); }
.dt-ai2-foothint{ color: rgba(255,255,255,0.52); font-size: 11px; letter-spacing: 0.02em; }

.dt-ai2-toast{
  position: sticky; bottom: 12px; margin-top: 12px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(0,0,0,0.38);
  backdrop-filter: blur(18px);
  box-shadow: 0 0 38px rgba(0,193,181,0.14);
  opacity:0; transform: translateY(12px);
  transition: opacity .25s ease, transform .25s ease;
}
.dt-ai2-toast.is-in{ opacity:1; transform: translateY(0); }

.dt-ai2-reveal{ opacity:0; transform: translateY(20px); }
.dt-ai2-reveal.is-in{
  opacity:1; transform: translateY(0);
  transition: opacity .45s ease, transform .45s cubic-bezier(.22,.9,.2,1);
}

@media (max-width: 680px){
  .dt-ai2-shell{ padding: 14px; }
  .dt-ai2-panel{ min-height: 520px; }
  .dt-ai2-bubble{ max-width: 92%; }
}