:root{
  --demo-guide-w: clamp(300px, 30vw, 380px);
  --demo-bar-h: calc(52px + env(safe-area-inset-top, 0px));

  --d-bg: #15161c;
  --d-raise: #1c1d24;
  --d-line: #262832;
  --d-text: #e8e9ee;
  --d-muted: #9a9eab;
  --d-accent: #e5484d;
  --d-accent-ink: #ff8a8e;
  --d-ok: #3dd68c;
}

.is-demo .stage{ top: var(--demo-bar-h); }

.demo-badge{
  display:inline-flex; align-items:center; height:20px; padding:0 7px;
  border:1px solid rgba(229,72,77,.55); border-radius:4px;
  color:var(--d-accent-ink); font-size:10.5px; font-weight:700;
  letter-spacing:.09em; text-transform:uppercase; white-space:nowrap;
}

.demo-guide button, .demo-bar button{ font-family:inherit; cursor:pointer; }
.demo-guide :focus-visible, .demo-bar :focus-visible{
  outline:2px solid var(--d-accent-ink); outline-offset:2px;
}

.demo-sr{
  position:absolute; width:1px; height:1px; overflow:hidden;
  clip:rect(0 0 0 0); white-space:nowrap;
}

.demo-bar{
  position:fixed; top:0; left:0; right:0; z-index:40;
  height:var(--demo-bar-h); padding:env(safe-area-inset-top, 0px) 12px 0;
  display:flex; align-items:center; gap:10px;
  background:var(--d-bg); border-bottom:1px solid var(--d-line);
  font-family:var(--ios-font); color:var(--d-text);
}
.demo-bar__text{
  flex:1; min-width:0; font-size:12.5px; color:var(--d-muted);
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
}
.demo-bar__btn{
  flex:0 0 auto; display:inline-flex; align-items:center; gap:6px;
  height:32px; padding:0 12px; border-radius:16px;
  border:1px solid #33363f; background:var(--d-raise); color:var(--d-text);
  font-size:13px; font-weight:600;
}
.demo-bar__btn b{ font-weight:600; color:var(--d-muted); font-variant-numeric:tabular-nums; }
.demo-bar.is-complete .demo-bar__btn b{ color:var(--d-ok); }

.demo-guide{
  position:fixed; z-index:60; left:0; right:0; bottom:0;
  max-height:min(88vh, 640px); max-height:min(88dvh, 640px);
  display:flex; flex-direction:column;
  background:var(--d-bg); color:var(--d-text);
  border-top:1px solid var(--d-line); border-radius:16px 16px 0 0;
  box-shadow:0 -18px 40px rgba(0,0,0,.45);
  font-family:var(--ios-font);
  padding-bottom:env(safe-area-inset-bottom, 0px);
  transform:translateY(105%); visibility:hidden;
  transition:transform .28s cubic-bezier(.2,.8,.2,1), visibility 0s linear .28s;
}
.demo-sheet-open .demo-guide{
  transform:none; visibility:visible;
  transition:transform .28s cubic-bezier(.2,.8,.2,1), visibility 0s;
}

.demo-backdrop{
  position:fixed; inset:0; z-index:50; background:rgba(0,0,0,.5);
  opacity:0; visibility:hidden; transition:opacity .2s ease, visibility 0s linear .2s;
}
.demo-sheet-open .demo-backdrop{ opacity:1; visibility:visible; transition:opacity .2s ease; }

.demo-guide__scroll{
  flex:1; min-height:0; overflow-y:auto; overscroll-behavior:contain;
  padding:18px 20px 8px;
}

.demo-guide__top{ display:flex; align-items:center; justify-content:space-between; }
.demo-guide__close{
  width:32px; height:32px; margin:-6px -8px -6px 0; padding:0;
  display:flex; align-items:center; justify-content:center;
  border:0; border-radius:16px; background:transparent;
}
.demo-guide__close svg{ width:14px; height:14px; stroke:var(--d-muted); stroke-width:1.8; stroke-linecap:round; }
.demo-guide__close:hover{ background:var(--d-raise); }

.demo-guide__title{
  margin:14px 0 6px; font-size:24px; line-height:1.15; font-weight:700; letter-spacing:-.01em;
}
.demo-guide__lead{ margin:0; font-size:14px; line-height:1.5; color:var(--d-muted); text-wrap:pretty; }

.demo-code{
  display:flex; flex-direction:column; align-items:flex-start; gap:9px;
  margin:18px 0 0; padding:14px; border-radius:12px;
  background:var(--d-raise); border:1px solid var(--d-line);
}
.demo-code__label{ font-size:11px; font-weight:600; letter-spacing:.06em;
  text-transform:uppercase; color:var(--d-muted); }
.demo-code__digits{ display:flex; gap:6px; }
.demo-code__digits b{
  width:32px; height:40px; display:flex; align-items:center; justify-content:center;
  border-radius:7px; background:#262832; border:1px solid #33363f;
  font-size:20px; font-weight:600; font-variant-numeric:tabular-nums;
}
.demo-code__note{ font-size:12.5px; line-height:1.4; color:var(--d-muted); }

.demo-tip{
  margin:14px 0 0; padding:10px 12px; border-radius:10px;
  border:1px solid rgba(229,72,77,.3); background:rgba(229,72,77,.08);
  font-size:13px; line-height:1.45; color:#f1d6d7;
}
.demo-tip.is-fresh{ animation:demo-in .25s ease; }

.demo-progress{ display:flex; align-items:center; gap:12px; margin:22px 0 4px; }
.demo-progress__label{ font-size:12px; color:var(--d-muted); white-space:nowrap; }
.demo-progress__label b{ color:var(--d-text); font-weight:600; font-variant-numeric:tabular-nums; }
.demo-progress__bar{ flex:1; height:4px; border-radius:2px; background:var(--d-line); overflow:hidden; }
.demo-progress__bar i{ display:block; height:100%; width:0; background:var(--d-accent);
  transition:width .35s ease, background-color .35s ease; }
.demo-guide.is-complete .demo-progress__bar i{ background:var(--d-ok); }

.demo-steps{ list-style:none; margin:0; padding:0; }
.demo-step{
  display:grid; grid-template-columns:22px minmax(0,1fr) auto; gap:12px; align-items:start;
  padding:13px 0; border-top:1px solid var(--d-line);
}
.demo-step:first-child{ border-top:0; }
.demo-step__check{
  position:relative; width:20px; height:20px; margin-top:1px;
  border-radius:50%; border:2px solid #3a3d48; transition:background-color .2s ease, border-color .2s ease;
}
.demo-step.is-done .demo-step__check{ background:var(--d-ok); border-color:var(--d-ok); }
.demo-step.is-done .demo-step__check::after{
  content:""; position:absolute; left:5px; top:1.5px; width:5px; height:10px;
  border:solid #0d1f15; border-width:0 2px 2px 0; transform:rotate(45deg);
}
.demo-step.is-fresh .demo-step__check{ animation:demo-pop .35s ease; }
.demo-step__body{ display:flex; flex-direction:column; gap:3px; min-width:0; }
.demo-step__body b{ font-size:14px; font-weight:600; line-height:1.3; }
.demo-step__body > span{ font-size:12.5px; line-height:1.45; color:var(--d-muted); }
.demo-step.is-done .demo-step__body b{ color:var(--d-muted); }
.demo-step__go{
  height:28px; padding:0 11px; border-radius:14px; white-space:nowrap;
  border:1px solid #33363f; background:transparent; color:var(--d-text);
  font-size:12px; font-weight:600;
}
.demo-step__go:hover{ background:var(--d-raise); }
.demo-step.is-done .demo-step__go{ color:var(--d-muted); border-color:var(--d-line); }

.demo-done{
  margin:6px 0 0; padding:14px; border-radius:12px;
  background:rgba(61,214,140,.08); border:1px solid rgba(61,214,140,.28);
  animation:demo-in .3s ease;
}
.demo-done b{ display:block; font-size:15px; color:#bff3d8; }
.demo-done p{ margin:4px 0 0; font-size:13px; line-height:1.45; color:var(--d-muted); }

.demo-hint{ margin:16px 0 6px; font-size:12px; line-height:1.45; color:#6f7380; }

.demo-guide__foot{
  flex:0 0 auto; display:flex; flex-direction:column; gap:8px;
  padding:12px 20px 16px; border-top:1px solid var(--d-line);
}
.demo-cta{
  display:flex; align-items:center; justify-content:center; height:44px; padding:0 16px;
  border-radius:10px; border:0; background:var(--d-accent); color:#fff;
  font-size:15px; font-weight:700; text-decoration:none;
}
.demo-cta:hover{ background:#d63b40; }
.demo-cta--start{ background:var(--d-raise); border:1px solid #33363f; color:var(--d-text); }
.demo-cta--start:hover{ background:#23252d; }
.demo-link{
  align-self:center; padding:6px 8px; border:0; background:transparent;
  color:var(--d-muted); font-size:12.5px; text-decoration:underline; text-underline-offset:3px;
}
.demo-link:hover{ color:var(--d-text); }

.demo-toast{
  position:fixed; z-index:45; left:50%; top:calc(var(--demo-bar-h) + 10px);
  width:max-content; max-width:min(92vw, 380px); padding:10px 14px;
  transform:translate(-50%, -8px); opacity:0; visibility:hidden;
  border-radius:10px; background:rgba(34,24,28,.97); border:1px solid rgba(229,72,77,.35);
  box-shadow:0 10px 26px rgba(0,0,0,.45);
  font-family:var(--ios-font); font-size:13px; line-height:1.45; color:var(--d-text);
  transition:opacity .2s ease, transform .2s ease, visibility 0s linear .2s;
}
.demo-toast.is-active{
  opacity:1; visibility:visible; transform:translate(-50%, 0);
  transition:opacity .2s ease, transform .2s ease;
}

@keyframes demo-in{ from{ opacity:0; transform:translateY(-4px); } to{ opacity:1; transform:none; } }
@keyframes demo-pop{ 0%{ transform:scale(.6); } 60%{ transform:scale(1.15); } 100%{ transform:scale(1); } }

@media (min-width: 760px){
  .is-demo .stage{ top:0; left:var(--demo-guide-w); }

  .demo-bar, .demo-backdrop, .demo-toast,
  .demo-guide__close, .demo-cta--start{ display:none !important; }

  .demo-guide{
    top:0; right:auto; width:var(--demo-guide-w); max-height:none;
    border-top:0; border-right:1px solid var(--d-line); border-radius:0;
    box-shadow:none; transform:none; visibility:visible; transition:none;
    padding-top:env(safe-area-inset-top, 0px);
  }
  .demo-guide__scroll{ padding:28px 24px 8px; }
  .demo-guide__foot{ padding:14px 24px 20px; }
  .demo-guide__title{ font-size:26px; margin-top:16px; }
}

@media (prefers-reduced-motion: reduce){
  .demo-guide, .demo-backdrop, .demo-toast, .demo-progress__bar i{ transition:none !important; }
  .demo-tip.is-fresh, .demo-step.is-fresh .demo-step__check, .demo-done{ animation:none; }
}