/* ═══════════════════════════════════════════════════════════════
   FMRP LEO TRAINING HUB — Design System
   Matches FMRP brand: dark navy, orange, blue accents
   Fonts: Bebas Neue (display) / Outfit (body) / JetBrains Mono (codes)
   ═══════════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;900&family=Bebas+Neue&family=JetBrains+Mono:wght@400;600;700&display=swap');

:root {
  --orange:      #FF8C42;
  --orange-dk:   #FF6B35;
  --blue:        #0D7FFF;
  --blue-lt:     #3B9AFF;
  --dark:        #0A1628;
  --dark-2:      #0D1E35;
  --dark-3:      #122847;
  --border-b:    rgba(13,127,255,.18);
  --border-o:    rgba(255,140,66,.28);
  --text:        #F0F4FF;
  --muted:       rgba(240,244,255,.58);
  --grad-o:      linear-gradient(135deg,#FF8C42,#FF6B35);
  --grad-b:      linear-gradient(135deg,#0D7FFF,#3B9AFF);
  --glow-o:      0 0 34px rgba(255,140,66,.30);
  --glow-b:      0 0 34px rgba(13,127,255,.30);
  --r:           16px;
  --r-sm:        10px;
  --tr:          .22s ease;
}

*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }
body {
  font-family:'Outfit',sans-serif;
  background:var(--dark);
  color:var(--text);
  line-height:1.6;
  overflow-x:hidden;
}
a { color:var(--orange); text-decoration:none; transition:color var(--tr); }
a:hover { color:var(--blue-lt); }
img { max-width:100%; display:block; }
::-webkit-scrollbar { width:6px; height:6px; }
::-webkit-scrollbar-track { background:var(--dark); }
::-webkit-scrollbar-thumb { background:rgba(255,140,66,.4); border-radius:3px; }

/* blueprint grid behind everything */
.bg-grid {
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background-image:
    linear-gradient(rgba(13,127,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13,127,255,.035) 1px, transparent 1px);
  background-size:60px 60px;
}
.bg-glow {
  position:fixed; z-index:0; pointer-events:none; border-radius:50%;
  filter:blur(120px); opacity:.16;
}
.bg-glow.o { width:520px; height:520px; background:#FF8C42; top:-180px; right:-140px; }
.bg-glow.b { width:560px; height:560px; background:#0D7FFF; bottom:-220px; left:-160px; }

.bebas { font-family:'Bebas Neue',sans-serif; letter-spacing:2px; }
.mono  { font-family:'JetBrains Mono',monospace; }

/* ═══════════════ HUB PAGE ═══════════════ */
.hub-wrap { position:relative; z-index:1; max-width:1240px; margin:0 auto; padding:0 2rem 5rem; }

.hub-header {
  display:flex; align-items:center; justify-content:space-between; gap:1rem;
  padding:1.4rem 0 1.2rem; border-bottom:1px solid var(--border-b); margin-bottom:3.2rem;
}
.hub-logo { display:flex; align-items:center; gap:.9rem; }
.hub-logo img { height:46px; width:auto; }
.hub-logo-text { font-family:'Bebas Neue',sans-serif; font-size:1.6rem; letter-spacing:2.5px; line-height:1; }
.hub-logo-text small { display:block; font-family:'Outfit'; font-size:.62rem; font-weight:600; letter-spacing:3.5px; color:var(--blue-lt); text-transform:uppercase; }
.hub-nav { display:flex; gap:1.6rem; font-size:.85rem; font-weight:600; letter-spacing:.5px; text-transform:uppercase; }
.hub-nav a { color:var(--muted); }
.hub-nav a:hover { color:var(--orange); }

.hub-hero { text-align:left; margin-bottom:3.4rem; max-width:760px; }
.hub-kicker {
  display:inline-flex; align-items:center; gap:.55rem;
  font-family:'JetBrains Mono',monospace; font-size:.72rem; font-weight:600;
  letter-spacing:3px; text-transform:uppercase; color:var(--orange);
  border:1px solid var(--border-o); border-radius:100px; padding:.4rem 1rem; margin-bottom:1.3rem;
  background:rgba(255,140,66,.06);
}
.hub-kicker::before { content:''; width:7px; height:7px; border-radius:50%; background:var(--orange); box-shadow:0 0 10px var(--orange); animation:pulse 1.8s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.35} }
.hub-hero h1 { font-family:'Bebas Neue',sans-serif; font-size:clamp(3rem,6.5vw,5rem); letter-spacing:3px; line-height:.98; }
.hub-hero h1 span { background:var(--grad-o); -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; }
.hub-hero p { margin-top:1.1rem; color:var(--muted); font-size:1.06rem; max-width:600px; }

.hub-section-label {
  font-family:'JetBrains Mono',monospace; font-size:.7rem; font-weight:600;
  letter-spacing:3.5px; text-transform:uppercase; color:var(--blue-lt);
  display:flex; align-items:center; gap:1rem; margin:0 0 1.3rem;
}
.hub-section-label::after { content:''; flex:1; height:1px; background:var(--border-b); }

.course-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(310px,1fr)); gap:1.4rem; margin-bottom:3.6rem; }
.course-card {
  position:relative; display:flex; flex-direction:column; gap:.9rem;
  background:var(--dark-2); border:1px solid var(--border-b); border-radius:var(--r);
  padding:1.7rem 1.6rem 1.5rem; transition:transform var(--tr), border-color var(--tr), box-shadow var(--tr);
  overflow:hidden;
}
.course-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:3px; background:var(--grad-b); opacity:.7;
}
.course-card.live::before { background:var(--grad-o); opacity:1; }
.course-card.live:hover { transform:translateY(-5px); border-color:var(--border-o); box-shadow:var(--glow-o); }
.course-card.locked { opacity:.62; }
.course-code {
  font-family:'JetBrains Mono',monospace; font-size:.74rem; font-weight:700; letter-spacing:2.5px;
  color:var(--orange);
}
.course-card.locked .course-code { color:var(--blue-lt); }
.course-card h3 { font-family:'Bebas Neue',sans-serif; font-size:1.9rem; letter-spacing:1.5px; line-height:1.05; }
.course-card p { color:var(--muted); font-size:.92rem; flex:1; }
.course-meta { display:flex; gap:.6rem; flex-wrap:wrap; }
.chip {
  font-size:.68rem; font-weight:700; letter-spacing:1.5px; text-transform:uppercase;
  padding:.3rem .7rem; border-radius:100px; border:1px solid var(--border-b); color:var(--blue-lt);
  background:rgba(13,127,255,.07);
}
.chip.o { border-color:var(--border-o); color:var(--orange); background:rgba(255,140,66,.07); }
.course-cta {
  margin-top:.4rem; display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  font-weight:800; font-size:.86rem; letter-spacing:1.5px; text-transform:uppercase;
  padding:.85rem 1.2rem; border-radius:var(--r-sm); transition:all var(--tr);
}
.course-cta.go { background:var(--grad-o); color:#fff; box-shadow:0 4px 18px rgba(255,107,53,.35); }
.course-cta.go:hover { transform:translateY(-2px); box-shadow:0 8px 26px rgba(255,107,53,.5); color:#fff; }
.course-cta.soon { border:1px dashed var(--border-b); color:var(--muted); cursor:default; }

.res-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:1rem; }
.res-card {
  display:flex; flex-direction:column; gap:.3rem;
  background:var(--dark-2); border:1px solid var(--border-b); border-radius:var(--r-sm);
  padding:1.1rem 1.2rem; transition:all var(--tr); color:var(--text);
}
.res-card:hover { border-color:var(--border-o); transform:translateY(-3px); color:var(--text); }
.res-card .res-name { font-weight:800; font-size:.98rem; display:flex; align-items:center; gap:.55rem; }
.res-card .res-name::before { content:'›'; color:var(--orange); font-weight:900; }
.res-card .res-url { font-family:'JetBrains Mono',monospace; font-size:.7rem; color:var(--blue-lt); letter-spacing:.5px; }
.res-card .res-desc { font-size:.8rem; color:var(--muted); }

.hub-footer { margin-top:4rem; padding-top:1.5rem; border-top:1px solid var(--border-b); color:var(--muted); font-size:.78rem; display:flex; justify-content:space-between; flex-wrap:wrap; gap:.5rem; }

/* ═══════════════ COURSE VIEWER ═══════════════ */
.viewer { position:relative; z-index:1; height:100vh; height:100dvh; display:flex; flex-direction:column; overflow:hidden; }

.v-top {
  display:flex; align-items:center; justify-content:space-between; gap:1rem;
  padding:.65rem 1.2rem; border-bottom:1px solid var(--border-b);
  background:rgba(10,22,40,.85); backdrop-filter:blur(12px); flex-shrink:0;
}
.v-brand { display:flex; align-items:center; gap:.7rem; min-width:0; }
.v-brand img { height:32px; }
.v-brand .v-course {
  font-family:'Bebas Neue',sans-serif; letter-spacing:1.5px; font-size:1.15rem; line-height:1; white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.v-brand .v-course b { color:var(--orange); font-weight:400; margin-right:.45rem; }
.v-controls { display:flex; align-items:center; gap:.45rem; flex-shrink:0; }
.v-btn {
  font-family:'Outfit'; font-weight:700; font-size:.72rem; letter-spacing:1.5px; text-transform:uppercase;
  background:transparent; border:1px solid var(--border-b); color:var(--muted);
  padding:.45rem .8rem; border-radius:8px; cursor:pointer; transition:all var(--tr);
  display:inline-flex; align-items:center; gap:.4rem;
}
.v-btn:hover { border-color:var(--border-o); color:var(--orange); }
.v-btn.primary { background:var(--grad-o); border:none; color:#fff; }
.v-btn kbd {
  font-family:'JetBrains Mono',monospace; font-size:.62rem; background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.14); border-radius:4px; padding:.05rem .35rem;
}
.v-counter { font-family:'JetBrains Mono',monospace; font-size:.78rem; color:var(--blue-lt); letter-spacing:1px; padding:0 .4rem; white-space:nowrap; }
.v-counter b { color:var(--orange); font-weight:700; }

.v-body { flex:1; display:flex; min-height:0; }

/* sidebar TOC */
.v-side {
  width:295px; flex-shrink:0; border-right:1px solid var(--border-b);
  background:rgba(13,30,53,.6); overflow-y:auto; padding:1rem .9rem 2rem;
  transition:margin var(--tr);
}
.v-side.hidden { margin-left:-295px; }
.toc-ch {
  font-family:'JetBrains Mono',monospace; font-size:.64rem; font-weight:700; letter-spacing:2.5px;
  text-transform:uppercase; color:var(--orange); margin:1.2rem 0 .45rem; padding:0 .5rem;
  display:flex; align-items:center; gap:.6rem;
}
.toc-ch::after { content:''; flex:1; height:1px; background:var(--border-o); opacity:.5; }
.toc-item {
  display:flex; align-items:baseline; gap:.6rem; width:100%; text-align:left;
  background:none; border:none; color:var(--muted); font-family:'Outfit'; font-size:.84rem; font-weight:500;
  padding:.42rem .55rem; border-radius:8px; cursor:pointer; transition:all var(--tr); line-height:1.3;
}
.toc-item:hover { color:var(--text); background:rgba(13,127,255,.08); }
.toc-item.active { color:var(--text); background:rgba(255,140,66,.12); }
.toc-item.active .toc-num { color:var(--orange); }
.toc-num { font-family:'JetBrains Mono',monospace; font-size:.66rem; color:var(--blue-lt); flex-shrink:0; min-width:1.4em; }

/* stage */
.v-stage { flex:1; position:relative; display:flex; align-items:center; justify-content:center; padding:1.6rem 4.4rem; min-width:0; }
.nav-arrow {
  position:absolute; top:50%; transform:translateY(-50%); z-index:5;
  width:46px; height:46px; border-radius:50%; border:1px solid var(--border-b);
  background:rgba(13,30,53,.8); color:var(--text); font-size:1.25rem; cursor:pointer;
  display:flex; align-items:center; justify-content:center; transition:all var(--tr);
}
.nav-arrow:hover { border-color:var(--orange); color:var(--orange); box-shadow:var(--glow-o); }
.nav-arrow.prev { left:.9rem; } .nav-arrow.next { right:.9rem; }
.nav-arrow:disabled { opacity:.25; cursor:default; box-shadow:none; }

.slide-frame {
  position:relative; width:100%; max-width:1500px; aspect-ratio:16/9; max-height:100%;
}
.slide {
  position:absolute; inset:0; display:flex; flex-direction:column;
  background:linear-gradient(160deg, #0E2140 0%, var(--dark-2) 55%, #0B1A30 100%);
  border:1px solid var(--border-b); border-radius:18px; overflow:hidden;
  opacity:0; visibility:hidden; transform:translateX(26px);
  transition:opacity .3s ease, transform .3s ease, visibility .3s;
  box-shadow:0 24px 60px rgba(0,0,0,.45);
}
.slide.active { opacity:1; visibility:visible; transform:translateX(0); }
.slide.exit-left { transform:translateX(-26px); }

/* slide chrome (footer bar like a CAD status strip) */
.slide-foot {
  margin-top:auto; flex-shrink:0; display:flex; align-items:center; justify-content:space-between;
  padding:.55rem 1.6rem; border-top:1px solid var(--border-b);
  font-family:'JetBrains Mono',monospace; font-size:.64rem; letter-spacing:1.5px; color:var(--muted);
  background:rgba(10,22,40,.5);
}
.slide-foot .ff-l { display:flex; align-items:center; gap:.6rem; }
.slide-foot img { height:18px; opacity:.85; }
.slide-foot .ff-r b { color:var(--orange); }

.slide-inner { flex:1; min-height:0; padding:2.6rem 3.4rem 1.6rem; display:flex; flex-direction:column; overflow-y:auto; }
.s-kicker {
  font-family:'JetBrains Mono',monospace; font-size:.78rem; font-weight:700; letter-spacing:3px;
  text-transform:uppercase; color:var(--blue-lt); margin-bottom:.55rem; display:flex; align-items:center; gap:.7rem;
}
.s-kicker::before { content:''; width:26px; height:2px; background:var(--grad-b); }
.s-title { font-family:'Bebas Neue',sans-serif; font-size:clamp(2rem,3.4vw,3.1rem); letter-spacing:2px; line-height:1; margin-bottom:1.4rem; }
.s-title em { font-style:normal; background:var(--grad-o); -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; }

/* point rows */
.s-points { display:flex; flex-direction:column; gap:.85rem; }
.pt {
  display:flex; gap:.95rem; align-items:flex-start;
  background:rgba(13,127,255,.05); border:1px solid var(--border-b);
  border-left:3px solid var(--blue); border-radius:var(--r-sm); padding:.8rem 1.1rem;
}
.pt-mark { color:var(--orange); font-weight:900; font-size:1rem; line-height:1.45; flex-shrink:0; }
.pt h4 { font-size:1.04rem; font-weight:800; line-height:1.35; }
.pt h4 .pt-d { display:block; font-size:.9rem; font-weight:400; color:var(--muted); margin-top:.1rem; }
.pt h4 .pt-d b, .pt h4 .pt-d strong { color:var(--text); font-weight:700; }

/* callout note */
.s-note {
  margin-top:1.15rem; display:flex; gap:.8rem; align-items:flex-start;
  background:rgba(255,140,66,.08); border:1px solid var(--border-o); border-radius:var(--r-sm);
  padding:.8rem 1.1rem; font-size:.92rem;
}
.s-note::before { content:'★'; color:var(--orange); font-size:.95rem; line-height:1.5; }
.s-note b { color:var(--orange); }

/* card slide */
.s-cards { display:grid; gap:1rem; align-content:start; }
.s-cards.c2 { grid-template-columns:1fr 1fr; }
.s-cards.c3 { grid-template-columns:1fr 1fr 1fr; }
.sc {
  background:rgba(13,127,255,.05); border:1px solid var(--border-b); border-radius:var(--r);
  padding:1.15rem 1.2rem; display:flex; flex-direction:column; gap:.45rem; position:relative; overflow:hidden;
}
.sc::before { content:''; position:absolute; top:0; left:0; right:0; height:3px; background:var(--grad-b); opacity:.6; }
.sc.hot::before { background:var(--grad-o); opacity:1; }
.sc .sc-tag { font-family:'JetBrains Mono',monospace; font-size:.66rem; font-weight:700; letter-spacing:2px; text-transform:uppercase; color:var(--orange); }
.sc h4 { font-family:'Bebas Neue',sans-serif; font-size:1.45rem; letter-spacing:1px; line-height:1.05; }
.sc p { font-size:.86rem; color:var(--muted); }
.sc ul { list-style:none; display:flex; flex-direction:column; gap:.3rem; font-size:.85rem; color:var(--muted); }
.sc ul li { padding-left:1rem; position:relative; }
.sc ul li::before { content:'›'; position:absolute; left:0; color:var(--orange); font-weight:900; }
.sc ul li b, .sc p b { color:var(--text); }

/* split slide */
.s-split { display:grid; grid-template-columns:1fr 1fr; gap:1.3rem; align-items:start; }
.sp-col { display:flex; flex-direction:column; gap:.7rem; }
.sp-head {
  font-family:'Bebas Neue',sans-serif; font-size:1.5rem; letter-spacing:1.5px;
  padding-bottom:.4rem; border-bottom:2px solid var(--border-o); display:flex; align-items:center; gap:.6rem;
}
.sp-col.b .sp-head { border-color:var(--border-b); }
.sp-col .pt { padding:.65rem 1rem; }

/* flow / pipeline slide */
.s-flow { display:flex; flex-direction:column; gap:.7rem; }
.flow-row { display:flex; align-items:stretch; gap:.55rem; }
.flow-step {
  flex:1; background:rgba(13,127,255,.06); border:1px solid var(--border-b); border-radius:var(--r-sm);
  padding:.85rem .9rem; text-align:center; display:flex; flex-direction:column; gap:.2rem; justify-content:center;
  position:relative;
}
.flow-step.hot { border-color:var(--border-o); background:rgba(255,140,66,.08); box-shadow:var(--glow-o); }
.flow-step .fs-tag { font-family:'JetBrains Mono',monospace; font-size:.6rem; letter-spacing:2px; color:var(--blue-lt); text-transform:uppercase; }
.flow-step.hot .fs-tag { color:var(--orange); }
.flow-step h4 { font-family:'Bebas Neue',sans-serif; font-size:1.2rem; letter-spacing:1px; line-height:1.05; }
.flow-step p { font-size:.74rem; color:var(--muted); line-height:1.3; }
.flow-arrow { display:flex; align-items:center; color:var(--orange); font-weight:900; font-size:1.1rem; flex-shrink:0; }

/* codes table slide */
.s-codes { display:grid; grid-template-columns:1fr 1fr; gap:.55rem 1.1rem; align-content:start; }
.code-row {
  display:flex; align-items:center; gap:1rem;
  background:rgba(13,127,255,.05); border:1px solid var(--border-b); border-radius:var(--r-sm);
  padding:.55rem .95rem;
}
.code-row .cc {
  font-family:'JetBrains Mono',monospace; font-weight:700; font-size:.95rem; color:var(--orange);
  min-width:5.2em; letter-spacing:.5px;
}
.code-row .cd { font-size:.9rem; }
.code-row .cd small { display:block; color:var(--muted); font-size:.76rem; }

/* chapter divider slide */
.slide.ch .slide-inner { justify-content:center; align-items:flex-start; padding:3rem 4rem; }
.ch-num {
  font-family:'JetBrains Mono',monospace; font-size:.85rem; font-weight:700; letter-spacing:4px;
  text-transform:uppercase; color:var(--orange); border:1px solid var(--border-o);
  border-radius:100px; padding:.45rem 1.2rem; background:rgba(255,140,66,.07); margin-bottom:1.4rem;
}
.ch-title { font-family:'Bebas Neue',sans-serif; font-size:clamp(3rem,6vw,5.4rem); letter-spacing:3px; line-height:.96; margin-bottom:1.4rem; max-width:14ch; }
.ch-items { display:flex; flex-wrap:wrap; gap:.55rem; max-width:760px; }
.ch-items span {
  font-size:.86rem; font-weight:600; color:var(--muted);
  border:1px solid var(--border-b); border-radius:100px; padding:.4rem 1rem; background:rgba(13,127,255,.05);
}
.slide.ch::after {
  content:''; position:absolute; right:-140px; top:-140px; width:480px; height:480px; border-radius:50%;
  background:radial-gradient(circle, rgba(255,140,66,.16), transparent 65%); pointer-events:none;
}

/* title + end slides */
.slide.titleslide .slide-inner, .slide.endslide .slide-inner { justify-content:center; align-items:center; text-align:center; }
.t-logo { height:84px; width:auto; margin-bottom:1.4rem; filter:drop-shadow(0 0 24px rgba(255,140,66,.35)); }
.t-code {
  font-family:'JetBrains Mono',monospace; font-size:.9rem; font-weight:700; letter-spacing:5px;
  color:var(--orange); text-transform:uppercase; margin-bottom:.8rem;
}
.t-title { font-family:'Bebas Neue',sans-serif; font-size:clamp(2.6rem,5.2vw,4.4rem); letter-spacing:3px; line-height:.97; max-width:18ch; }
.t-title em { font-style:normal; background:var(--grad-o); -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; }
.t-sub { margin-top:1rem; color:var(--muted); font-size:1.02rem; max-width:62ch; }
.t-tags { display:flex; gap:.6rem; margin-top:1.2rem; flex-wrap:wrap; justify-content:center; }

/* progress bar */
.v-progress { height:4px; background:rgba(13,127,255,.12); flex-shrink:0; }
.v-progress div { height:100%; background:var(--grad-o); width:0%; transition:width .3s ease; box-shadow:0 0 12px rgba(255,140,66,.6); }

/* grid overview */
.v-grid {
  position:fixed; inset:0; z-index:50; background:rgba(7,15,28,.96); backdrop-filter:blur(8px);
  overflow-y:auto; padding:2.4rem; display:none;
}
.v-grid.open { display:block; }
.v-grid-inner { max-width:1400px; margin:0 auto; display:grid; grid-template-columns:repeat(auto-fill,minmax(250px,1fr)); gap:1rem; }
.g-thumb {
  background:var(--dark-2); border:1px solid var(--border-b); border-radius:var(--r-sm);
  padding:1rem 1.1rem; cursor:pointer; transition:all var(--tr); min-height:108px;
  display:flex; flex-direction:column; gap:.35rem; text-align:left;
}
.g-thumb:hover { border-color:var(--border-o); transform:translateY(-3px); box-shadow:var(--glow-o); }
.g-thumb.current { border-color:var(--orange); }
.g-thumb .g-num { font-family:'JetBrains Mono',monospace; font-size:.66rem; color:var(--blue-lt); letter-spacing:1.5px; }
.g-thumb .g-title { font-weight:800; font-size:.95rem; line-height:1.25; color:var(--text); }
.g-thumb .g-kick { font-size:.7rem; color:var(--muted); text-transform:uppercase; letter-spacing:1px; }
.g-close-hint { text-align:center; color:var(--muted); font-size:.8rem; margin-bottom:1.4rem; font-family:'JetBrains Mono',monospace; letter-spacing:1px; }

/* help overlay */
.v-help {
  position:fixed; inset:0; z-index:60; background:rgba(7,15,28,.94); backdrop-filter:blur(8px);
  display:none; align-items:center; justify-content:center;
}
.v-help.open { display:flex; }
.help-card {
  background:var(--dark-2); border:1px solid var(--border-o); border-radius:var(--r);
  padding:2rem 2.4rem; max-width:480px; width:92%;
}
.help-card h3 { font-family:'Bebas Neue',sans-serif; font-size:1.8rem; letter-spacing:2px; margin-bottom:1.1rem; }
.help-row { display:flex; justify-content:space-between; align-items:center; padding:.5rem 0; border-bottom:1px solid var(--border-b); font-size:.9rem; }
.help-row:last-child { border:none; }
.help-row kbd {
  font-family:'JetBrains Mono',monospace; font-size:.74rem; background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.16); border-radius:6px; padding:.2rem .6rem; color:var(--orange);
}

/* responsive */
@media (max-width: 1100px) {
  .v-side { position:absolute; z-index:20; height:100%; left:0; top:0; background:rgba(10,22,40,.97); }
  .v-side.hidden { margin-left:-295px; }
  .v-stage { padding:1.2rem 3.4rem; }
  .s-cards.c3 { grid-template-columns:1fr 1fr; }
}
@media (max-width: 760px) {
  .slide-frame { aspect-ratio:auto; height:100%; }
  .slide-inner { padding:1.6rem 1.4rem 1rem; }
  .s-split, .s-codes, .s-cards.c2, .s-cards.c3 { grid-template-columns:1fr; }
  .flow-row { flex-direction:column; }
  .flow-arrow { transform:rotate(90deg); justify-content:center; }
  .v-stage { padding:.9rem 2.6rem; }
  .v-btn span.lbl { display:none; }
  .hub-nav { display:none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation:none !important; transition:none !important; }
}