:root{
  --bg:#05070c;
  --bg-2:#0a0f18;
  --panel:rgba(10,14,24,.72);
  --panel-2:rgba(255,255,255,.04);
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.16);
  --text:#f7f8fc;
  --muted:#9da6b8;
  --accent:#7c5cff;
  --accent-2:#15d1c5;
  --accent-3:#9d7cff;
  --shadow:0 24px 80px rgba(0,0,0,.45);
}

*{
  margin:0;
  padding:0;
  box-sizing:border-box;
}

html,
body{
  width:100%;
  height:100%;
}

body{
  font-family:'Inter',sans-serif;
  background:
    radial-gradient(circle at 12% 18%, rgba(124,92,255,.14), transparent 25%),
    radial-gradient(circle at 88% 20%, rgba(21,209,197,.10), transparent 22%),
    radial-gradient(circle at 50% 100%, rgba(124,92,255,.08), transparent 30%),
    linear-gradient(135deg, #04060a 0%, #07101a 100%);
  color:var(--text);
  overflow:hidden;
}

a{
  text-decoration:none;
  color:inherit;
}

button,
input,
textarea{
  font:inherit;
}

.app-shell{
  height:100vh;
  display:flex;
  flex-direction:column;
}

.app-topbar{
  height:86px;
  padding:0 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  position:relative;
  z-index:20;
  border-bottom:1px solid rgba(255,255,255,.06);
  background:rgba(5,7,12,.62);
  backdrop-filter:blur(18px);
}

.brand-link{
  display:flex;
  align-items:center;
  gap:14px;
}

.brand-icon{
  width:50px;
  height:50px;
  border-radius:18px;
  display:grid;
  place-items:center;
  background:linear-gradient(135deg, var(--accent-2), #63f5d7);
  color:#081018;
  box-shadow:0 16px 34px rgba(21,209,197,.24);
}

.brand-icon svg{
  width:28px;
  height:28px;
}

.brand-text{
  font-size:1.85rem;
  font-weight:900;
  letter-spacing:-0.05em;
  text-transform:lowercase;
}

.back-home{
  padding:14px 22px;
  border-radius:999px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.09);
  color:#fff;
  font-weight:700;
  transition:.25s ease;
}

.back-home:hover{
  background:rgba(255,255,255,.10);
  transform:translateY(-1px);
}

.app-stage{
  position:relative;
  flex:1;
  overflow:hidden;
}

.app-bg-orb{
  position:absolute;
  border-radius:50%;
  filter:blur(14px);
  opacity:.5;
  pointer-events:none;
  animation:floatOrb 8s ease-in-out infinite;
}

.orb-1{
  width:260px;
  height:260px;
  left:-40px;
  top:60px;
  background:radial-gradient(circle, rgba(124,92,255,.28), transparent 70%);
}

.orb-2{
  width:320px;
  height:320px;
  right:-80px;
  top:80px;
  background:radial-gradient(circle, rgba(21,209,197,.20), transparent 70%);
  animation-delay:1.2s;
}

.orb-3{
  width:300px;
  height:300px;
  left:50%;
  bottom:-120px;
  transform:translateX(-50%);
  background:radial-gradient(circle, rgba(157,124,255,.20), transparent 70%);
  animation-delay:2.1s;
}

.loading-screen,
.iframe-stage{
  position:absolute;
  inset:0;
}

.loading-screen{
  display:grid;
  place-items:center;
  padding:28px;
  z-index:12;
  transition:opacity .7s ease, visibility .7s ease, transform .7s ease;
}

.loading-screen.is-hidden{
  opacity:0;
  visibility:hidden;
  transform:scale(1.02);
  pointer-events:none;
}

.loading-card{
  width:min(760px, 100%);
  padding:34px;
  border-radius:34px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02)),
    rgba(8,12,20,.72);
  border:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(18px);
  box-shadow:var(--shadow);
  text-align:center;
  position:relative;
  overflow:hidden;
}

.loading-card::before{
  content:"";
  position:absolute;
  inset:-20% auto auto -10%;
  width:220px;
  height:220px;
  background:radial-gradient(circle, rgba(124,92,255,.22), transparent 70%);
  pointer-events:none;
}

.loading-card::after{
  content:"";
  position:absolute;
  right:-50px;
  bottom:-50px;
  width:220px;
  height:220px;
  background:radial-gradient(circle, rgba(21,209,197,.16), transparent 70%);
  pointer-events:none;
}

.loading-badge{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:10px 16px;
  border-radius:999px;
  border:1px solid rgba(124,92,255,.18);
  background:rgba(124,92,255,.12);
  color:#cfc6ff;
  font-size:.82rem;
  font-weight:800;
  letter-spacing:.08em;
}

.loading-icon-wrap{
  position:relative;
  width:144px;
  height:144px;
  margin:26px auto 18px;
  display:grid;
  place-items:center;
}

.pulse-ring{
  position:absolute;
  inset:0;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.10);
}

.pulse-ring-1{
  animation:ringPulse 2.2s ease-out infinite;
}

.pulse-ring-2{
  animation:ringPulse 2.2s ease-out infinite 1.1s;
}

.loading-core{
  width:86px;
  height:86px;
  border-radius:28px;
  display:grid;
  place-items:center;
  background:linear-gradient(135deg, var(--accent), var(--accent-2));
  color:#fff;
  box-shadow:
    0 20px 45px rgba(124,92,255,.28),
    0 8px 24px rgba(21,209,197,.16);
  animation:coreFloat 3.2s ease-in-out infinite;
}

.loading-core svg{
  width:38px;
  height:38px;
}

.loading-card h1{
  font-size:3rem;
  line-height:1.02;
  letter-spacing:-0.05em;
  font-weight:900;
}

.loading-text{
  margin:14px auto 0;
  max-width:560px;
  color:var(--muted);
  font-size:1.08rem;
  line-height:1.7;
  min-height:52px;
}

.progress-wrap{
  margin-top:26px;
  text-align:left;
}

.progress-bar{
  width:100%;
  height:14px;
  border-radius:999px;
  background:rgba(255,255,255,.07);
  overflow:hidden;
  border:1px solid rgba(255,255,255,.06);
}

.progress-fill{
  width:0;
  height:100%;
  border-radius:999px;
  background:linear-gradient(90deg, var(--accent-2), var(--accent), #b892ff);
  box-shadow:0 0 24px rgba(124,92,255,.30);
  transition:width .8s cubic-bezier(.22,1,.36,1);
}

.progress-meta{
  margin-top:12px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  color:#dce1eb;
  font-size:.95rem;
  font-weight:700;
}

.loading-steps{
  margin-top:28px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
}

.step-item{
  display:flex;
  align-items:center;
  gap:12px;
  padding:16px 18px;
  border-radius:18px;
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.06);
  color:#a4aec0;
  font-weight:700;
  transition:.28s ease;
}

.step-dot{
  width:12px;
  height:12px;
  border-radius:50%;
  background:rgba(255,255,255,.20);
  flex:0 0 auto;
  transition:.28s ease;
}

.step-item.active{
  border-color:rgba(124,92,255,.26);
  background:rgba(124,92,255,.08);
  color:#fff;
  transform:translateY(-1px);
}

.step-item.active .step-dot{
  background:linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow:0 0 0 6px rgba(124,92,255,.10);
}

.step-item.done{
  color:#d9deea;
}

.step-item.done .step-dot{
  background:#4ef0b1;
}

.iframe-stage{
  opacity:0;
  visibility:hidden;
  transform:scale(1.02);
  transition:opacity .75s ease, visibility .75s ease, transform .75s ease;
  padding:18px;
}

.iframe-stage.is-visible{
  opacity:1;
  visibility:visible;
  transform:scale(1);
}

.iframe-shell{
  width:100%;
  height:100%;
  border-radius:28px;
  overflow:hidden;
  border:1px solid rgba(255,255,255,.08);
  background:#05070c;
  box-shadow:var(--shadow);
}

.iframe-shell iframe{
  width:100%;
  height:100%;
  border:none;
  display:block;
  background:#05070c;
}

@keyframes ringPulse{
  0%{
    transform:scale(.72);
    opacity:.75;
  }
  100%{
    transform:scale(1.25);
    opacity:0;
  }
}

@keyframes coreFloat{
  0%,100%{
    transform:translateY(0);
  }
  50%{
    transform:translateY(-8px);
  }
}

@keyframes floatOrb{
  0%,100%{
    transform:translateY(0);
  }
  50%{
    transform:translateY(-18px);
  }
}

@media (max-width: 900px){
  .loading-card h1{
    font-size:2.35rem;
  }

  .loading-steps{
    grid-template-columns:1fr;
  }
}

@media (max-width: 768px){
  .app-topbar{
    height:78px;
    padding:0 16px;
  }

  .brand-text{
    font-size:1.55rem;
  }

  .brand-icon{
    width:44px;
    height:44px;
    border-radius:16px;
  }

  .back-home{
    padding:12px 16px;
    font-size:.92rem;
  }

  .loading-screen{
    padding:16px;
  }

  .loading-card{
    padding:24px 18px;
    border-radius:24px;
  }

  .loading-icon-wrap{
    width:120px;
    height:120px;
    margin-top:22px;
  }

  .loading-core{
    width:72px;
    height:72px;
    border-radius:22px;
  }

  .loading-core svg{
    width:32px;
    height:32px;
  }

  .loading-card h1{
    font-size:1.95rem;
  }

  .loading-text{
    font-size:1rem;
    min-height:auto;
  }

  .progress-meta{
    font-size:.88rem;
  }

  .step-item{
    padding:14px 14px;
    font-size:.94rem;
  }

  .iframe-stage{
    padding:10px;
  }

  .iframe-shell{
    border-radius:20px;
  }
}

@media (max-width: 520px){
  .app-topbar{
    gap:12px;
  }

  .brand-link{
    gap:10px;
  }

  .brand-text{
    font-size:1.35rem;
  }

  .back-home{
    padding:10px 14px;
    font-size:.86rem;
  }

  .loading-card h1{
    font-size:1.7rem;
  }

  .loading-badge{
    font-size:.74rem;
  }

  .progress-bar{
    height:12px;
  }
}