/* ============================================================
   e1099f interactive demo — scoped to .demo-shell
   ============================================================ */
.demo-shell {
  --d-blue: #0385ff;
  --d-blue-deep: #0257b8;
  --d-violet: #6d5ef6;
  --d-navy: #0b1220;
  --d-navy-2: #111b2e;

  --d-bg: #f5f7fb;
  --d-card: #ffffff;
  --d-ink: #0f172a;
  --d-muted: #5b6577;
  --d-hair: #e6eaf1;
  --d-hair-2: #eef1f7;
  --d-soft: #f2f5fb;

  --d-grad: linear-gradient(135deg, var(--d-blue) 0%, var(--d-violet) 100%);
  --d-sh-1: 0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px rgba(15, 23, 42, .06);
  --d-sh-2: 0 12px 40px rgba(3, 87, 200, .16);
  --d-radius: 18px;

  font-family: "Inter", "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  color: var(--d-ink);
  background:
    radial-gradient(1100px 460px at 50% -160px, rgba(109, 94, 246, .10), transparent 70%),
    var(--d-bg);
  min-height: 100%;
  padding: 40px 20px 72px;
  -webkit-font-smoothing: antialiased;
}
.demo-shell *, .demo-shell *::before, .demo-shell *::after { box-sizing: border-box; }

.demo-container { max-width: 940px; margin: 0 auto; }

/* ---------- Hero ---------- */
.demo-hero { text-align: center; margin-bottom: 34px; }
.demo-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 600; letter-spacing: .02em;
  color: var(--d-blue-deep);
  background: rgba(3, 133, 255, .08);
  border: 1px solid rgba(3, 133, 255, .18);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 18px;
}
.demo-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--d-blue);
  box-shadow: 0 0 0 4px rgba(3, 133, 255, .18);
  animation: demoPulse 2s ease-in-out infinite;
}
@keyframes demoPulse { 0%,100%{opacity:1} 50%{opacity:.35} }
.demo-h1 {
  font-size: clamp(28px, 5vw, 46px); line-height: 1.08;
  font-weight: 800; letter-spacing: -.02em; margin: 0 0 14px;
}
.demo-grad {
  background: var(--d-grad); -webkit-background-clip: text;
  background-clip: text; color: transparent;
}
.demo-deck {
  max-width: 640px; margin: 0 auto;
  font-size: 16px; line-height: 1.6; color: var(--d-muted);
}

/* ---------- Step indicator ---------- */
.demo-steps {
  display: flex; gap: 8px; list-style: none;
  margin: 0 0 22px; padding: 0;
}
.demo-step {
  flex: 1; display: flex; align-items: center; gap: 10px;
  padding: 12px 14px; border-radius: 12px;
  background: var(--d-card); border: 1px solid var(--d-hair);
  cursor: pointer; transition: border-color .2s, box-shadow .2s, transform .12s;
  min-width: 0;
}
.demo-step:hover { border-color: rgba(3,133,255,.35); }
.demo-step.is-active { border-color: var(--d-blue); box-shadow: 0 0 0 3px rgba(3,133,255,.12); }
.demo-step-num {
  flex: none; width: 26px; height: 26px; border-radius: 50%;
  display: grid; place-items: center;
  font-size: 13px; font-weight: 700;
  background: var(--d-soft); color: var(--d-muted);
  border: 1px solid var(--d-hair);
  transition: all .2s;
}
.demo-step.is-active .demo-step-num { background: var(--d-grad); color: #fff; border-color: transparent; }
.demo-step.is-done .demo-step-num { background: #e7f7ee; color: #0a8a4a; border-color: #bfe9d0; }
.demo-step.is-done .demo-step-num::after { content: "\2713"; }
.demo-step.is-done .demo-step-num { font-size: 0; }
.demo-step.is-done .demo-step-num::after { font-size: 14px; }
.demo-step-label {
  font-size: 13.5px; font-weight: 600; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}

/* ---------- Card ---------- */
.demo-card {
  background: var(--d-card);
  border: 1px solid var(--d-hair);
  border-radius: var(--d-radius);
  box-shadow: var(--d-sh-1);
  padding: 30px 30px 22px;
  position: relative; overflow: hidden;
}
.demo-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: var(--d-grad);
}

/* ---------- Panels ---------- */
.demo-panel { display: none; animation: demoFade .35s ease; }
.demo-panel.is-active { display: block; }
@keyframes demoFade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.demo-panel-head { margin-bottom: 20px; }
.demo-panel-title { font-size: 21px; font-weight: 750; margin: 0 0 6px; letter-spacing: -.01em; }
.demo-panel-sub { font-size: 14.5px; color: var(--d-muted); margin: 0; line-height: 1.55; }

/* ---------- Source picker ---------- */
.demo-source-picker {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 12px; margin-bottom: 20px;
}
.demo-source {
  display: flex; flex-direction: column; align-items: flex-start; gap: 3px;
  text-align: left; padding: 16px; border-radius: 14px;
  background: var(--d-card); border: 1.5px solid var(--d-hair);
  cursor: pointer; transition: all .18s; font-family: inherit;
}
.demo-source:hover { border-color: rgba(3,133,255,.4); transform: translateY(-1px); }
.demo-source .bi { font-size: 22px; color: var(--d-blue); margin-bottom: 6px; }
.demo-source.is-selected {
  border-color: var(--d-blue);
  background: linear-gradient(180deg, rgba(3,133,255,.05), rgba(109,94,246,.04));
  box-shadow: 0 0 0 3px rgba(3,133,255,.10);
}
.demo-source-name { font-size: 14px; font-weight: 650; color: var(--d-ink); }
.demo-source-meta { font-size: 12px; color: var(--d-muted); }

/* ---------- Code / mono panels ---------- */
.demo-code {
  background: var(--d-navy);
  border-radius: 14px; overflow: hidden;
  border: 1px solid rgba(255,255,255,.06);
  box-shadow: 0 18px 40px rgba(11, 18, 32, .28);
}
.demo-code-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 11px 14px;
  background: var(--d-navy-2);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.demo-code-dot { width: 11px; height: 11px; border-radius: 50%; flex: none; }
.demo-code-dot.r { background: #ff5f57; }
.demo-code-dot.y { background: #febc2e; }
.demo-code-dot.g { background: #28c840; }
.demo-code-file {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 12px; color: #8ea0bd; margin-left: 8px;
}
.demo-code-body {
  margin: 0; padding: 18px 18px; overflow-x: auto;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 12.5px; line-height: 1.7;
  color: #d6e2f5; white-space: pre; tab-size: 2;
}
.demo-code-body::-webkit-scrollbar { height: 8px; }
.demo-code-body::-webkit-scrollbar-thumb { background: rgba(255,255,255,.14); border-radius: 8px; }

/* XML syntax colors */
.demo-code-xml .x-tag { color: #7cc7ff; }
.demo-code-xml .x-attr { color: #c4b5fd; }
.demo-code-xml .x-val { color: #86efac; }
.demo-code-xml .x-text { color: #ffd591; }

.demo-copy {
  margin-left: auto; display: inline-flex; align-items: center; gap: 6px;
  font-family: inherit; font-size: 12px; font-weight: 600;
  color: #cfe0f7; background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  padding: 5px 11px; border-radius: 8px; cursor: pointer; transition: all .16s;
}
.demo-copy:hover { background: rgba(255,255,255,.16); }
.demo-copy.is-copied { color: #86efac; border-color: rgba(134,239,172,.4); }

/* ---------- Step 2 mapping ---------- */
.demo-map {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 0 20px; align-items: start;
}
.demo-map-col-head {
  display: flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  color: var(--d-muted); padding-bottom: 12px; margin-bottom: 4px;
  border-bottom: 1px solid var(--d-hair);
}
.demo-map-col-right .demo-map-col-head { color: var(--d-blue-deep); }
.demo-map-rows { grid-column: 1 / -1; list-style: none; margin: 8px 0 0; padding: 0; }
.demo-map-row {
  display: grid; grid-template-columns: 1fr 40px 1fr;
  align-items: center; gap: 10px;
  padding: 10px 0; border-bottom: 1px solid var(--d-hair-2);
  opacity: 0; transform: translateX(-12px);
  transition: opacity .4s ease, transform .4s ease;
}
.demo-map-row.is-in { opacity: 1; transform: none; }
.demo-map-cell {
  display: flex; flex-direction: column; gap: 2px; min-width: 0;
  padding: 9px 12px; border-radius: 10px;
}
.demo-map-from { background: var(--d-soft); border: 1px solid var(--d-hair); }
.demo-map-to { background: linear-gradient(180deg, rgba(3,133,255,.06), rgba(109,94,246,.05)); border: 1px solid rgba(3,133,255,.18); }
.demo-map-key { font-size: 11.5px; font-weight: 700; color: var(--d-muted); }
.demo-map-to .demo-map-key { color: var(--d-blue-deep); }
.demo-map-raw {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 12.5px; color: var(--d-ink);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.demo-map-arrow { display: grid; place-items: center; color: var(--d-violet); font-size: 15px; }
.demo-map-hint {
  margin-top: 16px; font-size: 13.5px; color: var(--d-muted);
  display: flex; align-items: center; gap: 8px;
}
.demo-map-hint.is-done { color: #0a8a4a; }
.demo-map-hint .bi { font-size: 16px; }

/* ---------- Step 4 transmit ---------- */
.demo-transmit { text-align: center; padding: 12px 0 4px; }
.demo-transmit-btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: inherit; font-size: 16px; font-weight: 700; color: #fff;
  background: var(--d-grad); border: none;
  padding: 16px 32px; border-radius: 14px; cursor: pointer;
  box-shadow: var(--d-sh-2); transition: transform .12s, filter .2s;
}
.demo-transmit-btn:hover:not(:disabled) { transform: translateY(-2px); filter: brightness(1.05); }
.demo-transmit-btn:disabled { opacity: .55; cursor: default; }
.demo-transmit-btn.is-sending { animation: none; }

.demo-progress { list-style: none; margin: 26px auto 0; padding: 0; max-width: 440px; text-align: left; }
.demo-progress li {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px; margin-bottom: 8px; border-radius: 11px;
  font-size: 14px; font-weight: 550; color: var(--d-muted);
  background: var(--d-soft); border: 1px solid var(--d-hair);
  transition: all .25s;
}
.demo-prog-ico {
  flex: none; width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid var(--d-hair); position: relative;
}
.demo-progress li.is-active { color: var(--d-ink); border-color: rgba(3,133,255,.35); background: rgba(3,133,255,.05); }
.demo-progress li.is-active .demo-prog-ico {
  border-color: var(--d-blue); border-top-color: transparent;
  animation: demoSpin .7s linear infinite;
}
@keyframes demoSpin { to { transform: rotate(360deg); } }
.demo-progress li.is-done { color: var(--d-ink); }
.demo-progress li.is-done .demo-prog-ico {
  border-color: #0a8a4a; background: #0a8a4a; animation: none;
}
.demo-progress li.is-done .demo-prog-ico::after {
  content: "\2713"; position: absolute; inset: 0;
  color: #fff; font-size: 11px; font-weight: 700;
  display: grid; place-items: center;
}

/* receipt */
.demo-receipt {
  margin: 26px auto 0; max-width: 480px; text-align: center;
  padding: 26px 24px 22px; border-radius: 16px;
  background: linear-gradient(180deg, #f0fbf4, #ffffff);
  border: 1px solid #c9ecd6;
  box-shadow: 0 12px 34px rgba(10, 138, 74, .12);
  animation: demoFade .4s ease;
}
.demo-receipt-badge {
  width: 52px; height: 52px; border-radius: 50%; margin: 0 auto 12px;
  display: grid; place-items: center; color: #fff; font-size: 28px;
  background: linear-gradient(135deg, #12b76a, #0a8a4a);
  box-shadow: 0 8px 20px rgba(10,138,74,.35);
}
.demo-receipt-status {
  font-size: 20px; font-weight: 800; letter-spacing: .06em; color: #0a8a4a; margin-bottom: 18px;
}
.demo-receipt-grid {
  display: grid; grid-template-columns: auto 1fr; gap: 8px 16px;
  text-align: left; padding: 16px; border-radius: 12px;
  background: rgba(255,255,255,.7); border: 1px solid #dcefe3;
}
.demo-receipt-k { font-size: 12.5px; font-weight: 600; color: var(--d-muted); }
.demo-receipt-v {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 12.5px; color: var(--d-ink); word-break: break-all;
}
.demo-receipt-note {
  display: flex; align-items: center; gap: 8px; justify-content: center;
  margin: 16px 0 0; font-size: 13px; font-weight: 600; color: #0a8a4a;
}

/* final CTA */
.demo-cta {
  margin-top: 26px; text-align: center;
  padding: 26px; border-radius: 16px;
  background: var(--d-navy);
  background-image: radial-gradient(600px 200px at 50% -60px, rgba(109,94,246,.35), transparent 70%);
}
.demo-cta-h { font-size: 20px; font-weight: 750; color: #fff; margin: 0 0 6px; }
.demo-cta-sub { font-size: 14px; color: #a9b7cf; margin: 0 0 18px; }
.demo-cta-btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 15px; font-weight: 700; color: #fff; text-decoration: none;
  background: var(--d-grad); padding: 14px 26px; border-radius: 12px;
  box-shadow: var(--d-sh-2); transition: transform .12s, filter .2s;
}
.demo-cta-btn:hover { transform: translateY(-2px); filter: brightness(1.06); }

/* ---------- Nav footer ---------- */
.demo-nav {
  display: flex; align-items: center; gap: 10px;
  margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--d-hair);
}
.demo-btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: inherit; font-size: 14.5px; font-weight: 650;
  padding: 11px 20px; border-radius: 11px; cursor: pointer;
  border: 1px solid transparent; transition: all .16s;
}
.demo-btn-ghost { background: var(--d-card); border-color: var(--d-hair); color: var(--d-ink); }
.demo-btn-ghost:hover:not(:disabled) { border-color: var(--d-muted); }
.demo-btn-ghost:disabled { opacity: .4; cursor: default; }
.demo-btn-primary { margin-left: auto; background: var(--d-grad); color: #fff; box-shadow: 0 6px 18px rgba(3,87,200,.28); }
.demo-btn-primary:hover { transform: translateY(-1px); filter: brightness(1.05); }
.demo-btn-replay { margin-left: auto; }
.demo-btn-replay + .demo-btn-primary { margin-left: 10px; }

.demo-footnote { text-align: center; font-size: 12.5px; color: var(--d-muted); margin: 20px 0 0; }

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .demo-shell { padding: 28px 14px 56px; }
  .demo-card { padding: 22px 18px 18px; }
  .demo-source-picker { grid-template-columns: 1fr; }
  .demo-step-label { display: none; }
  .demo-step { justify-content: center; }
  .demo-map { grid-template-columns: 1fr; }
  .demo-map-col-right .demo-map-col-head { display: none; }
  .demo-map-row { grid-template-columns: 1fr; gap: 6px; padding: 12px 0; }
  .demo-map-arrow { transform: rotate(90deg); justify-self: start; }
}

/* ---------- Dark mode ---------- */
@media (prefers-color-scheme: dark) {
  .demo-shell {
    --d-bg: #0a0f1a;
    --d-card: #0f1626;
    --d-ink: #e8eef8;
    --d-muted: #93a1bd;
    --d-hair: #1e2942;
    --d-hair-2: #182238;
    --d-soft: #131c30;
    background:
      radial-gradient(1100px 460px at 50% -160px, rgba(109, 94, 246, .16), transparent 70%),
      var(--d-bg);
  }
  .demo-step.is-done .demo-step-num { background: rgba(18,183,106,.16); color: #4ade80; border-color: rgba(18,183,106,.3); }
  .demo-source.is-selected { background: linear-gradient(180deg, rgba(3,133,255,.12), rgba(109,94,246,.10)); }
  .demo-map-to { background: linear-gradient(180deg, rgba(3,133,255,.12), rgba(109,94,246,.10)); }
  .demo-receipt { background: linear-gradient(180deg, rgba(18,183,106,.10), var(--d-card)); border-color: rgba(18,183,106,.28); }
  .demo-receipt-grid { background: rgba(0,0,0,.2); border-color: rgba(18,183,106,.2); }
  .demo-receipt-status, .demo-receipt-note, .demo-map-hint.is-done { color: #4ade80; }
  .demo-progress li.is-done .demo-prog-ico, .demo-step.is-done .demo-step-num::after { }
}