/* ============================================================
   PRESENTATION LAYOUT
   Fullscreen slides, navigated with the arrow keys.
   Slide themes:
     data-theme="scene"   — transparent, the 3D world shows through
     data-theme="surface" — light content card covers the canvas
     data-theme="dark"    — ink closing slide, header inverts
   ============================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html, body { height: 100%; }
body {
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: 1.5;
  color: var(--ink);
  background: var(--bg-scene);
  overflow: hidden;                 /* a presentation does not scroll */
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
::selection { background: var(--accent-glow); color: #fff; }
kbd {
  font-family: var(--font); font-size: .82em;
  border: 1px solid currentColor; border-radius: 5px;
  padding: .1em .45em; opacity: .8; margin: 0 .15em;
}

/* ---------- 3D canvas: fixed, full viewport, behind everything ---------- */
#scene { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; transition: opacity .4s ease; }
body.no-webgl #scene { display: none; }
.topic-markers { transition: opacity .4s ease; }

/* ---------- topic marker — floating label above the 3D stop ---------- */
.topic-marker {
  position: fixed;
  z-index: 50;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transform: scale(0.96);
  transform-origin: 50% 100%;
  transition:
    opacity .28s ease,
    transform .28s var(--ease),
    visibility 0s linear .28s;
  display: flex; align-items: flex-start; gap: 16px;
  max-width: 440px;
  background: rgba(250, 251, 255, .96);
  border: 1.5px solid rgba(57, 50, 220, .3);
  border-radius: 16px;
  padding: 22px 26px;
  box-shadow:
    0 0 40px rgba(57, 50, 220, .15),
    0 0 80px rgba(57, 50, 220, .08),
    0 16px 40px -12px rgba(5, 4, 25, .15);
  backdrop-filter: blur(16px) saturate(1.2);
}
.topic-marker.visible {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
  transition:
    opacity .32s ease,
    transform .32s var(--ease),
    visibility 0s;
  animation: marker-glow 2.5s ease-in-out infinite;
}
@keyframes marker-glow {
  0%, 100% {
    box-shadow: 0 0 40px rgba(57, 50, 220, .12), 0 0 80px rgba(57, 50, 220, .06), 0 16px 40px -12px rgba(5, 4, 25, .15);
    border-color: rgba(57, 50, 220, .28);
  }
  50% {
    box-shadow: 0 0 55px rgba(57, 50, 220, .28), 0 0 100px rgba(57, 50, 220, .14), 0 20px 50px -10px rgba(5, 4, 25, .2);
    border-color: rgba(57, 50, 220, .55);
  }
}
/* connector line down to the beacon — height set per-frame by JS
   (--connector) to exactly span the gap from panel bottom to beacon top */
.topic-marker::after {
  content: '';
  position: absolute;
  left: 50%; top: 100%;
  width: 2px; height: var(--connector, 72px);
  background: linear-gradient(to bottom, rgba(57, 50, 220, .55), rgba(57, 50, 220, .08));
  transform: translateX(-50%);
  pointer-events: none;
}
.tm-num {
  flex: none;
  font-size: 11px; font-weight: 700;
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--accent-glow), var(--accent));
  color: #fff;
  letter-spacing: .02em;
  box-shadow: 0 4px 14px -4px rgba(57, 50, 220, .5);
}
.tm-text h3 {
  font-size: 18px; font-weight: 500;
  letter-spacing: -.01em; margin-bottom: 4px; color: var(--ink);
  line-height: 1.2;
}
.tm-text p {
  font-size: 13.5px; line-height: 1.45;
  color: var(--muted); max-width: 320px;
}
.tm-arrow {
  position: absolute;
  left: 50%; bottom: -8px;
  transform: translateX(-50%);
  width: 0; height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid rgba(250, 251, 255, .96);
  filter: drop-shadow(0 2px 3px rgba(57, 50, 220, .15));
}

/* ---------- zoom-in cue ---------- */
.zoom-cue .lead {
  color: var(--ink); opacity: .7;
  animation: cue-pulse 2.6s ease-in-out infinite;
}

/* ---------- visual strip — two layers (compact) ---------- */
.layers-strip {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  margin: clamp(4px, .8vh, 10px) 0;
  padding: 6px 10px;
}
.layer-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px; border-radius: 20px;
  font-size: clamp(11px, 1vw, 13px); font-weight: 500; letter-spacing: .01em;
  white-space: nowrap;
}
.layer-pill.vm {
  background: rgba(57,50,220,.1); color: var(--accent-glow);
  border: 1.5px solid rgba(57,50,220,.25);
  box-shadow: 0 0 20px rgba(57,50,220,.1);
}
.layer-pill.hv {
  background: rgba(255,58,47,.08); color: #b71f30;
  border: 1.5px solid rgba(255,58,47,.22);
  box-shadow: 0 0 20px rgba(255,58,47,.08);
}
.layer-pill::before {
  content: '';
  display: inline-block; width: 6px; height: 6px; border-radius: 50%;
}
.layer-pill.vm::before { background: var(--accent-glow); }
.layer-pill.hv::before { background: #FF3A2F; }

/* ---------- intro grid enhancements ---------- */
.intro-card {
  position: relative;
  border-radius: var(--radius-card);
  background: #fff;
  padding: clamp(10px, 1.5vh, 14px) clamp(12px, 1.5vw, 16px);
  border: 1.5px solid rgba(5,4,25,.08);
  transition: transform .3s ease, box-shadow .3s ease;
}
.intro-card:hover { transform: translateY(-3px); box-shadow: 0 12px 30px -12px rgba(5,4,25,.15); }
.intro-card .icon { height: clamp(36px, 4.5vh, 48px); margin-bottom: 6px; }
.intro-card .icon svg { height: 100%; width: auto; stroke-width: 1.8; }

/* icon-specific colors */
.icon-vm   svg { stroke: var(--accent-glow); }
.icon-hv   svg { stroke: #FF3A2F; }
.icon-shield svg { stroke: #0c7a45; }

/* floating icon animation */
@keyframes icon-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}
.intro-card .icon svg {
  animation: icon-float 3s ease-in-out infinite;
}
.intro-card:nth-child(2) .icon svg { animation-delay: .5s; }
.intro-card:nth-child(3) .icon svg { animation-delay: 1s; }

/* card accent bar */
.intro-card::after {
  content: '';
  position: absolute; top: 0; left: 20%; right: 20%; height: 3px; border-radius: 0 0 3px 3px;
  opacity: .6;
}
.intro-card:nth-child(1)::after { background: linear-gradient(90deg, var(--accent-glow), var(--accent)); }
.intro-card:nth-child(2)::after { background: linear-gradient(90deg, #FF3A2F, #FF6B62); }
.intro-card:nth-child(3)::after { background: linear-gradient(90deg, #0c7a45, #0F9D58); }

/* kicker pulse dot */
.pulse-dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-glow); margin-right: 8px; vertical-align: middle;
  animation: kicker-pulse 2s ease-in-out infinite;
}
@keyframes kicker-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: .5; }
}

/* layers strip connector */
.layers-strip { position: relative; }
.layers-strip::before {
  content: '';
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 40px; height: 2px;
  background: linear-gradient(90deg, var(--accent-glow), #FF3A2F);
  opacity: .3; z-index: -1;
}
.layer-pill { animation: pill-glow 2.5s ease-in-out infinite; }
@keyframes pill-glow {
  0%, 100% { box-shadow: 0 0 12px rgba(57,50,220,.1); }
  50% { box-shadow: 0 0 24px rgba(57,50,220,.2); }
}
.layer-pill.hv { animation: pill-glow-red 2.5s ease-in-out infinite; }
@keyframes pill-glow-red {
  0%, 100% { box-shadow: 0 0 12px rgba(255,58,47,.08); }
  50% { box-shadow: 0 0 24px rgba(255,58,47,.18); }
}
.layer-pill:nth-child(2) { animation-delay: .3s; }
.intro-card h3 { font-size: clamp(13px, 1.2vw, 15px); font-weight: 700; margin-bottom: 4px; letter-spacing: -.01em; }
.intro-card p { color: var(--muted); font-size: clamp(12px, 1vw, 14px); line-height: 1.4; }

/* ---------- visual meter for RPO / RTO ---------- */

.rpo-visual {
  display: flex; align-items: center; gap: 10px;
  margin-top: 8px; padding: 8px 10px;
  background: rgba(5,4,25,.03); border-radius: 10px;
}
.rpo-meter {
  flex: 1; height: 6px; border-radius: 3px;
  background: rgba(5,4,25,.08); overflow: hidden; position: relative;
}
.rpo-meter-fill {
  height: 100%; border-radius: 3px;
  background: linear-gradient(90deg, var(--accent-glow), var(--accent));
  transform-origin: left;
  animation: meter-grow 1.2s ease-out forwards;
}
@keyframes meter-grow { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.rpo-meter-labels {
  display: flex; justify-content: space-between;
  font-size: 9px; color: var(--muted); margin-top: 3px;
}
.rpo-stat {
  flex: none; text-align: center;
}
.rpo-stat .stat-num {
  font-size: clamp(16px, 1.8vw, 22px); font-weight: 500;
  color: var(--accent-glow); line-height: 1;
}
.rpo-stat .stat-unit { font-size: 9px; color: var(--muted); letter-spacing: .06em; }

/* ---------- animated glow border for cards ---------- */
.glow-card {
  position: relative;
  border-radius: var(--radius-card);
  background: #fff;
  padding: clamp(14px, 2vh, 20px) clamp(16px, 1.8vw, 22px);
  border: 1.5px solid transparent;
  background-clip: padding-box;
  overflow: hidden;
}
.glow-card::before {
  content: '';
  position: absolute; inset: -2px; z-index: -1;
  border-radius: calc(var(--radius-card) + 2px);
  background: linear-gradient(135deg, rgba(57,50,220,.3), rgba(0,0,238,.15), rgba(57,50,220,.3));
  background-size: 200% 200%;
  animation: glow-shift 3s ease infinite;
  opacity: .6;
}
@keyframes glow-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ---------- risk warning visual ---------- */
.risk-visual {
  display: flex; align-items: center; gap: 12px;
  margin-top: 8px; padding: 10px 14px;
  background: linear-gradient(135deg, rgba(255,58,47,.06), rgba(217,52,68,.04));
  border: 1.5px solid rgba(217,52,68,.2);
  border-radius: 10px;
}
.risk-visual .risk-icon {
  flex: none; width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(217,52,68,.12); border-radius: 50%;
}
.risk-visual .risk-icon svg { width: 16px; height: 16px; stroke: #d93444; fill: none; stroke-width: 2; }
.risk-visual p { font-size: clamp(11px, 1vw, 13px); color: rgba(5,4,25,.75); line-height: 1.4; }
.risk-visual p b { color: var(--ink); font-weight: 500; }

/* ---------- animated pulse dot ---------- */
.pulse-dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-glow); margin-right: 8px;
  animation: pulse-dot 2s ease-in-out infinite;
  vertical-align: middle;
}
@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; box-shadow: 0 0 0 0 rgba(57,50,220,.4); }
  50% { transform: scale(1.3); opacity: .7; box-shadow: 0 0 0 8px rgba(57,50,220,0); }
}

/* ---------- intro grid enhancements ---------- */
.intro-card {
  position: relative;
  border-radius: var(--radius-card);
  background: #fff;
  padding: clamp(14px, 2vh, 20px) clamp(16px, 1.8vw, 22px);
  border: 1.5px solid rgba(5,4,25,.08);
  transition: transform .3s ease, box-shadow .3s ease;
}
.intro-card:hover { transform: translateY(-3px); box-shadow: 0 12px 30px -12px rgba(5,4,25,.15); }
.intro-card .icon { height: clamp(40px, 5.5vh, 56px); margin-bottom: 10px; }
.intro-card .icon svg { height: 100%; width: auto; stroke: var(--ink); fill: none; stroke-width: 1.5; }
.intro-card h3 { font-size: clamp(14px, 1.3vw, 17px); font-weight: 700; margin-bottom: 6px; letter-spacing: -.01em; }
.intro-card p { color: var(--muted); font-size: clamp(13px, 1.1vw, 15px); line-height: 1.45; }

/* ---------- RPO / RTO section ---------- */
.rto-section { margin-top: clamp(10px, 1.5vh, 16px); }
.rto-section h3 {
  font-size: clamp(18px, 1.8vw, 22px); font-weight: 500;
  letter-spacing: -.02em; margin-bottom: 12px;
}
.rpo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.rpo-card {
  border: 1px solid rgba(5,4,25,.12); border-radius: var(--radius-card);
  padding: clamp(14px, 2vh, 20px) clamp(14px, 1.5vw, 20px);
  background: #fff;
}
.rpo-label {
  display: inline-block; font-size: 11.5px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--muted);
  margin-bottom: 10px;
}
.rpo-big {
  display: block; font-size: clamp(18px, 1.8vw, 22px); font-weight: 500;
  letter-spacing: -.02em; margin-bottom: 10px; color: var(--ink);
}
.rpo-card p { color: var(--muted); font-size: clamp(12.5px, 1.1vw, 14.5px); line-height: 1.4; }
.rpo-card p b { color: var(--ink); font-weight: 500; }
@media (max-width: 760px) { .rpo-grid { grid-template-columns: 1fr; } }

/* ---------- modes section (grouped in Stop 2) ---------- */
.modes-section { margin-top: clamp(10px, 1.5vh, 16px); }
.modes-section h3 {
  font-size: clamp(16px, 1.5vw, 20px); font-weight: 500;
  letter-spacing: -.02em; margin-bottom: 12px;
}

/* 2-col layout: cards left, graph right */
.modes-split {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: center;
}
@media (max-width: 980px) { .modes-split { grid-template-columns: 1fr; } }

.modes-cols-v2 { display: flex; flex-direction: column; gap: 10px; }

.mode-card-v2 {
  border: 1px solid rgba(5,4,25,.12); border-radius: var(--radius-card);
  padding: clamp(10px, 1.5vh, 14px) clamp(12px, 1.5vw, 16px);
  background: #fff;
  display: flex; flex-direction: column; gap: 4px;
}
.mode-card-v2 h3 { font-size: clamp(15px, 1.5vw, 18px); font-weight: 500; letter-spacing: -.02em; margin: 4px 0 2px; }
.mode-card-v2 p { color: var(--muted); font-size: clamp(12px, 1.05vw, 14px); line-height: 1.4; }
.mode-card-v2 .mode-meta { margin-top: 4px; color: rgba(5,4,25,.7); font-size: clamp(11px, 1vw, 13px); }
.mode-card-v2 .mode-meta b { color: var(--ink); font-weight: 500; }

/* graph card */
.modes-graph-wrap {
  border-radius: var(--radius-card); overflow: hidden;
  background: #1a1a2e;
  box-shadow: 0 16px 40px -12px rgba(5,4,25,.3);
  display: flex; align-items: center; justify-content: center;
  padding: 8px;
  align-self: center;
}
.modes-graph-wrap .shot { margin: 0; width: 100%; cursor: zoom-in; }
.modes-graph-wrap .shot img {
  width: 100%; height: auto; display: block; border-radius: 8px;
  transition: transform .2s ease;
}
.modes-graph-wrap .shot:hover img { transform: scale(1.02); }

/* ---------- prob section (grouped in Stop 4) ---------- */
.prob-section { margin-top: clamp(12px, 2vh, 20px); }
.prob-section h3 {
  font-size: clamp(18px, 1.8vw, 22px); font-weight: 500;
  letter-spacing: -.02em; margin-bottom: 12px;
}

/* ---------- morph transition styles ---------- */
.slide-morphing {
  position: fixed !important;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  z-index: 10;
  overflow: hidden;
  border-radius: 0;
}
.slide-morphing .slide-wrap {
  opacity: 0; transform: scale(0.96);
  transition: opacity .4s ease .15s, transform .4s var(--ease) .15s;
}
.slide-morphing.morph-expanded .slide-wrap {
  opacity: 1; transform: scale(1);
}


/* ---------- page-load wipe overlay ---------- */
#wipe { position: fixed; inset: 0; z-index: 999; background: var(--ink); }

/* ============================================================
   HEADER — fixed 80px, transparent, inverts on the dark slide
   ============================================================ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--header-h);
  display: flex; align-items: center;
  padding: 0 32px;
  z-index: 100;
  color: var(--ink);
  transition: color .35s ease, opacity .4s ease;
}
.site-header .nav-left { flex: 1; display: flex; gap: 28px; }
.site-header .nav-left a {
  font-size: var(--fs-ui); text-transform: uppercase; letter-spacing: .05em;
  text-decoration: none; opacity: .85; transition: opacity .25s;
}
.site-header .nav-left a:hover { opacity: 1; }
.wordmark {
  position: absolute; left: 50%; transform: translateX(-50%);
  font-weight: 500; font-size: 20px; letter-spacing: .32em; text-indent: .32em;
  user-select: none;
}
.site-header .nav-right { flex: 1; display: flex; justify-content: flex-end; gap: 10px; }
.site-header.is-inverted { color: var(--surface); }
.site-header.is-inverted .btn-ghost { background: rgba(252,252,252,.15); color: var(--surface); }
.site-header.is-inverted .btn-solid-dark { background: var(--surface); color: var(--ink); }
@media (max-width: 880px) { .site-header .nav-left { display: none; } }

/* ============================================================
   BUTTONS — pill / capsule
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 48px; padding: 0 24px;
  border-radius: var(--radius-pill);
  font-family: var(--font); font-size: 14px; font-weight: 400;
  letter-spacing: .02em; text-transform: uppercase; text-decoration: none;
  border: none; cursor: pointer;
  transition: transform .3s ease, filter .3s ease, background .3s ease;
}
.btn:hover { transform: scale(1.03); filter: brightness(1.06); }
.btn-solid-dark  { background: var(--ink);     color: var(--surface); }
.btn-solid-light { background: var(--surface); color: var(--ink); }
.btn-ghost       { background: rgba(5,4,25,.1); color: var(--ink); }

/* ============================================================
   SLIDES
   ============================================================ */
.slide {
  position: fixed; inset: 0;
  opacity: 0; visibility: hidden; pointer-events: none;
  z-index: 1;
}
.slide.is-active { opacity: 1; visibility: visible; pointer-events: auto; }
.slide-surface { background: var(--surface); }
.slide-dark    { background: var(--ink); color: var(--surface); }

/* generic inner wrapper: header-safe, vertically centered, fits 100vh */
.slide-wrap {
  height: 100%;
  max-width: 1360px; margin: 0 auto;
  padding: calc(var(--header-h) + 12px) clamp(20px, 4vw, 48px) 32px;
  display: flex; flex-direction: column; justify-content: center;
  overflow: auto;                    /* safety net on short screens */
  scrollbar-width: none;
}
.slide-wrap::-webkit-scrollbar { display: none; }
.slide-surface .slide-wrap {
  justify-content: flex-start;
  padding-top: calc(var(--header-h) + 6px);
  padding-bottom: 20px;
}

/* ---------- typography ---------- */
h1 {
  font-size: var(--fs-h1); line-height: .9; letter-spacing: -.06em;
  font-weight: 500; text-align: center;
}
h2.big {
  font-size: clamp(24px, 3.2vw, 42px); line-height: 1.02;
  letter-spacing: -.035em; font-weight: 500;
  margin-bottom: clamp(10px, 1.8vh, 20px);
}
.lead {
  font-size: var(--fs-lead); line-height: 1.25; font-weight: 400; max-width: 640px;
}
.kicker {
  font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 8px; font-weight: 500;
}
code {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: .85em; background: rgba(5,4,25,.07);
  padding: .1em .45em; border-radius: 5px;
}

/* ============================================================
   1 · TITLE SLIDE — over the 3D scene
   ============================================================ */
.slide-center {
  height: 100%;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
  padding: calc(var(--header-h) + 12px) 24px 96px;
}
.slide-center .lead { margin-top: 26px; color: rgba(5,4,25,.72); }
.title-meta {
  margin-top: 30px;
  font-size: 13px; letter-spacing: .1em; text-transform: uppercase;
  color: rgba(5,4,25,.55);
}
.key-cue {
  position: absolute; bottom: 38px; left: 50%; transform: translateX(-50%);
  font-size: 13px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--ink); white-space: nowrap;
  animation: cue-pulse 2.6s ease-in-out infinite;
}
@keyframes cue-pulse { 0%, 100% { opacity: .55; } 50% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .key-cue { animation: none; } }

/* ============================================================
   2–5 · JOURNEY SLIDES — text panel over the camera flight
   ============================================================ */
.journey-panel {
  position: absolute;
  left: clamp(20px, 5vw, 72px);
  bottom: clamp(32px, 8vh, 84px);
  max-width: 560px;
  pointer-events: none;
}
.j-kicker {
  font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
  color: rgba(5,4,25,.55); margin-bottom: 18px;
}
.j-map {
  list-style: none; display: flex; gap: 10px; margin-bottom: 22px;
}
.j-map li {
  font-size: 13px; font-weight: 500;
  width: 44px; height: 32px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: rgba(5,4,25,.5);
  background: rgba(252,252,252,.35);
  transition: all .4s var(--ease);
}
.j-map li.on {
  color: var(--ink); background: var(--surface);
  height: 40px;
  box-shadow: 0 10px 26px -10px rgba(5,4,25,.35);
}
.journey-panel h2 {
  font-size: clamp(30px, 3.4vw, 46px); line-height: 1.02;
  letter-spacing: -.03em; font-weight: 500; margin-bottom: 16px;
}
.journey-panel p {
  font-size: clamp(16px, 1.35vw, 19px); line-height: 1.55;
  color: rgba(5,4,25,.7); max-width: 520px;
}
.journey-panel p em { font-style: normal; color: var(--accent-glow); font-weight: 500; }

/* ============================================================
   6 · THEORY GRID — 2×2, compact to fit one screen
   ============================================================ */
.feature-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(12px, 2vh, 20px) 28px;
}
.feature-card .icon { height: clamp(36px, 5vh, 52px); margin-bottom: 8px; }
.feature-card .icon svg { height: 100%; width: auto; stroke: var(--ink); fill: none; stroke-width: 1.6; }
.feature-card h3 { font-size: clamp(14px, 1.3vw, 17px); font-weight: 700; margin-bottom: 6px; letter-spacing: -.01em; }
.feature-card p { color: var(--muted); max-width: 520px; font-size: clamp(13px, 1.1vw, 15px); line-height: 1.4; }
.feature-card p b { color: var(--ink); font-weight: 500; }
@media (max-width: 760px) { .feature-grid { grid-template-columns: 1fr; } }

/* ============================================================
   7 · IMPLEMENTATION — two pro/con columns
   ============================================================ */
.vs-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.vs-col {
  border: 1px solid rgba(5,4,25,.12); border-radius: var(--radius-card);
  padding: clamp(20px, 3vh, 34px) clamp(20px, 2.4vw, 34px);
  background: #fff;
}
.vs-col h3 { font-size: clamp(18px, 1.8vw, 23px); font-weight: 500; letter-spacing: -.02em; margin: 10px 0 12px; }
.vs-col .tagline { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.vs-col ul { list-style: none; }
.vs-col li {
  display: flex; gap: 12px; padding: clamp(5px, 1vh, 9px) 0;
  color: rgba(5,4,25,.75); line-height: 1.45; font-size: clamp(14px, 1.25vw, 16px);
}
.vs-col li b { color: var(--ink); font-weight: 500; }
.vs-col .mark { flex: none; width: 20px; font-weight: 700; }
.vs-col .mark.y { color: var(--accent); }
.vs-col .mark.n { color: rgba(5,4,25,.35); }
@media (max-width: 880px) { .vs-cols { grid-template-columns: 1fr; } }

/* ============================================================
   8 · VERDICT — screenshot card + table side by side
   ============================================================ */
.verdict-grid {
  display: grid; grid-template-columns: 1fr 1.15fr; gap: 24px; align-items: center;
}
.compare-intro {
  position: relative;
  border-radius: var(--radius-card); overflow: hidden;
  box-shadow: 0 30px 80px -30px rgba(5,4,25,.35);
  background: #fff;
  border: 1.5px solid rgba(5,4,25,.08);
  display: flex; align-items: center; justify-content: center;
  padding: clamp(14px, 2vh, 22px) clamp(14px, 1.8vw, 20px);
}
.compare-intro-card { display: flex; flex-direction: column; gap: 10px; }
.compare-intro-card h3 {
  font-size: clamp(18px, 1.8vw, 22px); font-weight: 500;
  letter-spacing: -.02em; color: var(--ink);
}
.compare-intro-card p {
  color: var(--muted); font-size: clamp(11px, 1vw, 13px); line-height: 1.45;
}
.compare-pills { display: flex; gap: 8px; margin-top: 4px; }
.compare-pills .pro { background: rgba(57,50,220,.1); color: var(--accent-glow); border: 1px solid rgba(57,50,220,.25); }
.compare-pills .vmw { background: rgba(5,4,25,.06); color: var(--ink); border: 1px solid rgba(5,4,25,.12); }
.photo-tag {
  position: absolute; left: 14px; bottom: 12px;
  font-size: 11.5px; letter-spacing: .05em; color: #fff;
  font-family: ui-monospace, Consolas, monospace;
  background: rgba(5,4,25,.75); border-radius: 8px; padding: 5px 10px;
}
.compare-table {
  border: 1px solid rgba(5,4,25,.12); border-radius: var(--radius-card);
  overflow: hidden; background: #fff;
}
.compare-table table { width: 100%; border-collapse: collapse; font-size: clamp(12px, 1.05vw, 14px); }
.compare-table th {
  text-align: left; font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
  font-weight: 500; color: var(--muted);
  padding: 10px 14px; border-bottom: 1px solid rgba(5,4,25,.12);
}
.compare-table td {
  padding: clamp(7px, 1.2vh, 10px) 14px; border-bottom: 1px solid rgba(5,4,25,.08);
  color: rgba(5,4,25,.78); line-height: 1.4;
}
.compare-table tr:last-child td { border-bottom: none; }
.compare-table td b { color: var(--ink); font-weight: 500; }
.pill-tag {
  display: inline-block; padding: 3px 12px; border-radius: var(--radius-pill);
  font-size: 12.5px; font-weight: 500; white-space: nowrap;
}
.pill-tag.win { background: rgba(0,0,238,.08); color: var(--accent); }
.pill-tag.tie { background: rgba(5,4,25,.07); color: var(--muted); }
@media (max-width: 880px) { .verdict-grid { grid-template-columns: 1fr; gap: 20px; } }

/* ============================================================
   9 · LIVE DEMO — steps + terminal + screenshots
   ============================================================ */
.demo-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 24px; align-items: center; }
@media (max-width: 980px) { .demo-grid { grid-template-columns: 1fr; } }
.demo-step {
  display: grid; grid-template-columns: 36px 1fr; column-gap: 12px;
  padding: clamp(6px, 1.2vh, 10px) 0; border-bottom: 1px solid rgba(5,4,25,.1);
}
.demo-step:first-child { padding-top: 0; }
.demo-step:last-child { border-bottom: none; }
.demo-step .num { font-size: 12px; font-weight: 500; color: var(--muted); padding-top: 3px; }
.demo-step h4 { font-size: clamp(14px, 1.25vw, 16px); font-weight: 500; margin-bottom: 2px; letter-spacing: -.01em; }
.demo-step p { color: var(--muted); font-size: clamp(12px, 1.05vw, 14px); line-height: 1.4; }
.terminal {
  background: var(--ink); border-radius: var(--radius-card); overflow: hidden;
  box-shadow: 0 30px 80px -30px rgba(5,4,25,.4);
}
.terminal-bar { display: flex; gap: 7px; padding: 12px 14px; }
.terminal-bar i { width: 10px; height: 10px; border-radius: 50%; }
.terminal-bar i:nth-child(1) { background: #ff5f57; }
.terminal-bar i:nth-child(2) { background: #febc2e; }
.terminal-bar i:nth-child(3) { background: #28c840; }
.terminal pre {
  padding: 4px 14px 12px; overflow-x: auto;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: clamp(10px, .95vw, 11.5px); line-height: 1.6; color: #dfe6f3;
}
.terminal .c { color: #5f6a8a; }
.terminal .p { color: #79ffa8; }
.terminal .f { color: #8f9dff; }
.terminal .o { color: #ffc46b; }
.demo-shots { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 14px; }
.shot {
  position: relative; border-radius: 12px; overflow: hidden; cursor: zoom-in;
  box-shadow: 0 14px 36px -18px rgba(5,4,25,.4);
  transition: transform .3s ease, box-shadow .3s ease;
}
.shot:hover { transform: translateY(-4px); box-shadow: 0 22px 50px -20px rgba(5,4,25,.5); }
.shot img { width: 100%; height: clamp(64px, 10vh, 96px); object-fit: cover; object-position: top left; }
.shot figcaption {
  position: absolute; inset: auto 0 0 0; padding: 5px 8px;
  font-size: 10px; color: #fff; letter-spacing: .04em;
  font-family: ui-monospace, Consolas, monospace;
  background: linear-gradient(transparent, rgba(5,4,25,.85));
}
.lightbox {
  position: fixed; inset: 0; z-index: 300;
  background: rgba(5,4,25,.88);
  display: flex; align-items: center; justify-content: center;
  padding: 4vh 4vw; opacity: 0; pointer-events: none;
  transition: opacity .3s ease; cursor: zoom-out;
}
.lightbox.open { opacity: 1; pointer-events: auto; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 12px; }

/* ============================================================
   10 · TAKEAWAYS — card grid with icons
   ============================================================ */
.takeaways-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; max-width: 1000px; }
@media (max-width: 980px) { .takeaways-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .takeaways-grid { grid-template-columns: 1fr; } }

.takeaway-card {
  display: flex; flex-direction: column; gap: 12px;
  padding: clamp(16px, 2.2vh, 24px) clamp(16px, 2vw, 24px);
  border-radius: var(--radius-card);
  background: #fff;
  border: 1.5px solid rgba(5,4,25,.1);
  box-shadow: 0 8px 24px -8px rgba(5,4,25,.12);
  transition: transform .3s ease, box-shadow .3s ease;
}
.takeaway-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px -12px rgba(5,4,25,.18);
}
.t-icon {
  flex: none;
  width: clamp(40px, 5vh, 56px); height: clamp(40px, 5vh, 56px);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(57,50,220,.08);
  color: var(--accent-glow);
}
.t-icon svg { height: 60%; width: auto; }
.t-card-text { display: flex; flex-direction: column; gap: 4px; }
.t-card-text .t-num {
  font-size: 12px; font-weight: 500; color: var(--accent-glow);
  letter-spacing: .1em;
}
.t-card-text h3 {
  font-size: clamp(15px, 1.4vw, 18px); font-weight: 600;
  letter-spacing: -.01em; color: var(--ink);
  line-height: 1.2;
}
.t-card-text p {
  font-size: clamp(12px, 1.1vw, 14px); color: var(--muted);
  line-height: 1.5;
}
.t-card-text p code { font-size: 11px; }

/* ============================================================
   11 · Q&A — dark closing slide
   ============================================================ */
.end-wrap { align-items: flex-start; justify-content: flex-end; padding-bottom: 24px; }
.end-title { color: var(--surface); font-size: clamp(48px, 7vw, 110px); }
.end-sub { color: rgba(252,252,252,.6); margin-top: 14px; font-size: 14px; letter-spacing: .06em; }
.mega-wordmark {
  margin-top: clamp(24px, 6vh, 64px);
  align-self: center;
  font-weight: 500; letter-spacing: .02em; line-height: .8;
  font-size: clamp(80px, 17vw, 260px);
  color: var(--surface); opacity: .96; user-select: none;
}

/* ============================================================
   6 · BACKUP MODES — three columns + emphasis banner
   ============================================================ */
.modes-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 880px) { .modes-cols { grid-template-columns: 1fr; } }
.mode-card {
  border: 1px solid rgba(5,4,25,.12); border-radius: var(--radius-card);
  padding: clamp(14px, 2vh, 20px) clamp(14px, 1.5vw, 20px);
  background: #fff;
}
.mode-card h3 { font-size: clamp(17px, 1.7vw, 22px); font-weight: 500; letter-spacing: -.02em; margin: 8px 0 6px; }
.mode-card p { color: var(--muted); font-size: clamp(12.5px, 1.1vw, 14.5px); line-height: 1.4; }
.mode-card .mode-meta { margin-top: 8px; color: rgba(5,4,25,.7); }
.mode-card .mode-meta b { color: var(--ink); font-weight: 500; }
.tag-time {
  display: inline-block; padding: 4px 14px; border-radius: var(--radius-pill);
  font-size: 12.5px; font-weight: 500; letter-spacing: .03em;
}
.t-green { background: rgba(15,157,88,.12);  color: #0c7a45; }
.t-amber { background: rgba(214,143,0,.14);  color: #9a6700; }
.t-red   { background: rgba(217,52,68,.11);  color: #b71f30; }
.not-banner {
  margin-top: clamp(12px, 2vh, 20px);
  background: var(--ink); color: var(--surface);
  border-radius: var(--radius-card);
  padding: clamp(16px, 2.5vh, 24px) clamp(18px, 2.5vw, 28px);
}
.not-banner h3 {
  font-size: clamp(20px, 2.6vw, 32px); font-weight: 500; letter-spacing: -.03em;
  margin-bottom: 6px;
}
.not-banner .no { color: #FF3A2F; }
.not-banner p { color: rgba(252,252,252,.66); font-size: clamp(13px, 1.2vw, 15px); line-height: 1.4; max-width: 760px; }

/* ============================================================
   8–9 · IMPLEMENTATION SLIDES — methods/bullets + tall shots
   ============================================================ */
.impl-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; align-items: center; }
@media (max-width: 980px) { .impl-grid { grid-template-columns: 1fr; } }
.impl-note {
  margin-top: clamp(12px, 2.4vh, 22px);
  color: var(--muted); font-size: clamp(13.5px, 1.2vw, 15.5px); line-height: 1.55;
}
.impl-note b { color: var(--ink); font-weight: 500; }
.stack-shots { display: grid; gap: 16px; }
.shot-lg img { height: clamp(140px, 24vh, 230px); }
.vs-list { list-style: none; }
.vs-list li {
  display: flex; gap: 12px; padding: clamp(6px, 1.2vh, 10px) 0;
  border-bottom: 1px solid rgba(5,4,25,.08);
  color: rgba(5,4,25,.75); line-height: 1.4; font-size: clamp(13px, 1.2vw, 16px);
}
.vs-list li:last-child { border-bottom: none; }
.vs-list li b { color: var(--ink); font-weight: 500; }
.vs-list .mark { flex: none; width: 22px; font-weight: 700; }
.vs-list .mark.y { color: var(--accent); }
.vs-list .mark.n { color: rgba(5,4,25,.35); }

/* ============================================================
   11 · DEMO 1 — the compression stat
   ============================================================ */
.stat-row {
  display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
  margin-top: clamp(10px, 1.8vh, 16px);
  padding: clamp(10px, 1.8vh, 14px) clamp(12px, 1.5vw, 18px);
  border: 1px solid rgba(57,50,220,.25); border-radius: var(--radius-card);
  background: rgba(57,50,220,.05);
}
.stat-big { font-size: clamp(22px, 2.6vw, 34px); font-weight: 500; letter-spacing: -.03em; }
.stat-arrow { font-size: clamp(20px, 2.2vw, 30px); color: var(--accent-glow); }
.stat-label { flex-basis: 100%; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.demo-shots-2 { grid-template-columns: 1fr 1fr; }
.demo-shots-2 .shot img { height: clamp(64px, 10vh, 96px); }

/* ============================================================
   13 · PROBLEMS & LEARNINGS — problem / fix / lesson
   ============================================================ */
.prob-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 880px) { .prob-grid { grid-template-columns: 1fr; } }
.prob-card {
  border: 1px solid rgba(5,4,25,.12); border-radius: var(--radius-card);
  padding: clamp(14px, 2vh, 20px) clamp(14px, 1.5vw, 20px);
  background: #fff;
}
.prob-label {
  display: inline-block; font-size: 11.5px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--muted);
  margin-bottom: 10px;
}
.prob-card h3 { font-size: clamp(16px, 1.6vw, 20px); font-weight: 500; letter-spacing: -.02em; margin-bottom: 8px; }
.prob-card p { color: var(--muted); font-size: clamp(12.5px, 1.1vw, 14.5px); line-height: 1.4; }
.prob-lesson { border-color: rgba(57,50,220,.4); background: rgba(57,50,220,.04); }
.prob-lesson .prob-label { color: var(--accent-glow); }

/* ============================================================
   14 · TAKEAWAYS — the 3-2-1 banner
   ============================================================ */
.rule-321 {
  display: flex; align-items: center; gap: clamp(14px, 2vw, 24px); flex-wrap: wrap;
  margin-top: clamp(10px, 1.5vh, 16px);
  padding: clamp(10px, 1.8vh, 16px) clamp(14px, 1.8vw, 22px);
  border: 1px solid rgba(57,50,220,.3); border-radius: var(--radius-card);
  background: rgba(57,50,220,.05);
}
.rule-321 .nums { font-size: clamp(24px, 2.8vw, 38px); font-weight: 500; letter-spacing: -.02em; }
.rule-321 .nums span { color: var(--accent-glow); margin: 0 .08em; }
.rule-321 p { flex: 1; min-width: 260px; color: rgba(5,4,25,.72); font-size: clamp(13px, 1.2vw, 15px); line-height: 1.4; }
.rule-321 b { color: var(--ink); font-weight: 500; }

/* ============================================================
   DECK CHROME — progress bar, counter, controls, hint
   ============================================================ */
.deck-bar {
  position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 200;
  background: rgba(5,4,25,.08);
}
#deckBar {
  height: 100%; width: 0;
  background: linear-gradient(90deg, #FF3A2F, var(--accent-glow));
  transition: width .5s var(--ease);
}
.deck-controls {
  position: fixed; right: 24px; bottom: 22px; z-index: 200;
  display: flex; align-items: center; gap: 8px;
}
.deck-counter {
  font-size: 12.5px; letter-spacing: .1em; color: var(--muted);
  margin-right: 6px; font-variant-numeric: tabular-nums;
  cursor: pointer; user-select: none;
  transition: opacity .2s ease;
}
.deck-counter:hover { color: var(--ink); }
.slide-dark.is-active ~ .deck-controls .deck-counter { color: rgba(252,252,252,.6); }
.slide-dark.is-active ~ .deck-controls .deck-counter:hover { color: var(--surface); }
body.qa-open .deck-counter {
  color: rgba(252,252,252,.9);
  text-shadow: 0 1px 8px rgba(0,0,0,.45);
}
body.qa-open .deck-counter:hover { color: #fff; }
.deck-jump {
  display: none;
  width: 52px; height: 28px;
  font-family: var(--font); font-size: 13px; letter-spacing: .08em;
  text-align: center; color: var(--ink);
  background: #fff; border: 1px solid rgba(5,4,25,.18); border-radius: 8px;
  margin-right: 6px; outline: none;
  box-shadow: 0 4px 12px rgba(5,4,25,.12);
}
.deck-jump.active { display: block; }
body:has(.slide-dark.is-active) .deck-jump {
  color: var(--surface); background: rgba(5,4,25,.6); border-color: rgba(252,252,252,.25);
}
.deck-btn {
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid rgba(5,4,25,.18);
  background: rgba(252,252,252,.6); color: var(--ink);
  font-size: 15px; cursor: pointer;
  transition: transform .25s ease, background .25s ease;
  backdrop-filter: blur(4px);
}
.deck-btn:hover { transform: scale(1.08); background: #fff; }
.deck-hint {
  position: fixed; left: 24px; bottom: 28px; z-index: 200;
  font-size: 11.5px; letter-spacing: .06em; text-transform: uppercase;
  color: var(--muted);
}
@media (max-width: 760px) { .deck-hint { display: none; } }

/* ---------- step content slide open: keep Prev, Next, Counter + Fullscreen ----------
   When a content slide (data-theme="surface") is active, body.content-open
   is set by deck.js. We fade out the header (Start / VIRCL / Q&A), the top
   progress bar, and the nav hint — leaving Prev, Next, Counter, and
   Fullscreen buttons anchored bottom-right. */
.deck-bar, .deck-hint { transition: opacity .4s ease; }
body.content-open .site-header,
body.content-open .deck-bar,
body.content-open .deck-hint {
  opacity: 0;
  pointer-events: none;
}

/* ---------- TITLE META GRID — team / class / school / teachers ---------- */
.title-meta-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 28px;
  margin-top: clamp(20px, 3.5vh, 32px);
  max-width: 960px;
}
.title-meta-grid div {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}
.title-meta-grid span {
  font-size: 10px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(5,4,25,.45);
}
.title-meta-grid b {
  font-size: clamp(12px, 1.1vw, 15px);
  color: var(--ink);
  font-weight: 500;
}

/* ---------- Q&A REWORK — clean dark closing ---------- */
.qa-wrap {
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: clamp(16px, 3vh, 28px);
}
.qa-header {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.qa-header .end-title {
  font-size: clamp(42px, 6vw, 80px);
  line-height: 1;
  letter-spacing: -.04em;
  margin-bottom: 6px;
}
.qa-header .end-sub {
  font-size: clamp(13px, 1.2vw, 16px);
  color: rgba(252,252,252,.5);
  letter-spacing: .04em;
}
.qa-info {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 14px;
  max-width: 900px;
}
.qa-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 10px 16px;
  border-radius: 12px;
  background: rgba(252,252,252,.08);
  border: 1px solid rgba(252,252,252,.12);
  min-width: 130px;
}
.qa-label {
  font-size: 10px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(252,252,252,.45);
}
.qa-value {
  font-size: clamp(12px, 1.1vw, 15px);
  color: var(--surface);
  font-weight: 500;
}
.qa-wrap .mega-wordmark {
  margin-top: clamp(12px, 2.5vh, 20px);
  font-size: clamp(60px, 10vw, 140px);
  opacity: .85;
}

/* ============================================================
   STOP 1 — COMPLETE REDESIGN
   ============================================================ */

/* ---------- Two-layer hero diagram ---------- */
.layer-hero {
  display: flex; justify-content: center; align-items: center;
  margin: clamp(10px, 1.5vh, 16px) 0;
}
/* ---------- Horizontal layer pair ---------- */
.layer-pair {
  display: flex; align-items: stretch; justify-content: center; gap: 0;
  max-width: 700px; margin: 0 auto;
}
.layer-card {
  flex: 1; min-width: 0;
  padding: clamp(14px, 2vh, 20px) clamp(16px, 2vw, 24px);
  border-radius: 16px;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  text-align: center;
  box-shadow: 0 8px 30px -10px rgba(5,4,25,.2);
}
.layer-card.vm {
  background: linear-gradient(135deg, #f8f7ff 0%, #efedff 100%);
  border: 2px solid rgba(57,50,220,.2);
  border-top-right-radius: 6px; border-bottom-right-radius: 6px;
}
.layer-card.hv {
  background: linear-gradient(135deg, #fff5f4 0%, #ffedeb 100%);
  border: 2px solid rgba(255,58,47,.2);
  border-top-left-radius: 6px; border-bottom-left-radius: 6px;
}
.layer-card-icon {
  flex: none;
  width: clamp(44px, 5.5vw, 56px); height: clamp(44px, 5.5vw, 56px);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: #fff;
  box-shadow: 0 4px 12px -4px rgba(5,4,25,.15);
}
.layer-card-icon svg { height: 60%; width: auto; }
.layer-card.vm .layer-card-icon svg { stroke: var(--accent-glow); }
.layer-card.hv .layer-card-icon svg { stroke: #FF3A2F; }
.layer-card-text { display: flex; flex-direction: column; gap: 2px; }
.layer-card-text .tag {
  font-size: clamp(10px, .9vw, 12px); font-weight: 500;
  letter-spacing: .08em; text-transform: uppercase;
}
.layer-card.vm .layer-card-text .tag { color: var(--accent-glow); }
.layer-card.hv .layer-card-text .tag { color: #FF3A2F; }
.layer-card-text .desc { font-size: clamp(12px, 1.1vw, 14px); color: var(--muted); }

/* Connector between horizontal cards */
.layer-connector {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 0; width: 40px; flex: none;
  position: relative;
}
.layer-connector .conn-line {
  flex: 1; width: 2px; min-height: 20px;
  background: linear-gradient(to bottom, rgba(57,50,220,.4), rgba(255,58,47,.4));
}
.layer-connector .conn-badge {
  background: #fff;
  border: 1.5px solid rgba(5,4,25,.1);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 10px; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink);
  box-shadow: 0 4px 12px -4px rgba(5,4,25,.15);
  white-space: nowrap;
  z-index: 2;
}

@media (max-width: 640px) {
  .layer-pair { flex-direction: column; gap: 8px; }
  .layer-connector { flex-direction: row; width: auto; height: 30px; }
  .layer-connector .conn-line { width: auto; height: 2px; min-height: 0; min-width: 20px; }
}

/* ---------- Redesigned intro cards ---------- */

.intro-cards-v2 {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px;
  margin: clamp(10px, 1.5vh, 16px) 0;
}
@media (max-width: 880px) { .intro-cards-v2 { grid-template-columns: 1fr; } }

.intro-card-v2 {
  position: relative;
  border-radius: 16px;
  background: #fff;
  padding: clamp(12px, 1.8vh, 18px) clamp(14px, 1.6vw, 20px);
  border: 1.5px solid rgba(5,4,25,.08);
  display: flex; flex-direction: column;
  gap: 8px;
  overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease;
}
.intro-card-v2:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -10px rgba(5,4,25,.12); }

/* Top accent bar per card */
.intro-card-v2::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  border-radius: 3px 3px 0 0;
}
.intro-card-v2.vm-card::before { background: linear-gradient(90deg, var(--accent-glow), var(--accent)); }
.intro-card-v2.hv-card::before { background: linear-gradient(90deg, #FF3A2F, #FF6B62); }
.intro-card-v2.risk-card::before { background: linear-gradient(90deg, #0c7a45, #0F9D58); }

/* Card icon — large, centered, with soft background */
.card-icon-wrap {
  align-self: flex-start;
  width: clamp(56px, 7vh, 72px); height: clamp(56px, 7vh, 72px);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 4px;
}
.vm-card .card-icon-wrap { background: rgba(57,50,220,.08); }
.hv-card .card-icon-wrap { background: rgba(255,58,47,.08); }
.risk-card .card-icon-wrap { background: rgba(15,157,88,.08); }
.card-icon-wrap svg { height: 55%; width: auto; }
.vm-card .card-icon-wrap svg { stroke: var(--accent-glow); }
.hv-card .card-icon-wrap svg { stroke: #FF3A2F; }
.risk-card .card-icon-wrap svg { stroke: #0c7a45; }

.intro-card-v2 h3 {
  font-size: clamp(13px, 1.2vw, 15px); font-weight: 700;
  letter-spacing: -.01em; color: var(--ink);
}
.intro-card-v2 p {
  color: var(--muted); font-size: clamp(11.5px, 1vw, 13.5px);
  line-height: 1.45;
}

/* ---------- RPO/RTO — big stat dashboard ---------- */
.rto-dashboard {
  margin-top: clamp(10px, 1.5vh, 16px);
}
.rto-dashboard h3 {
  font-size: clamp(14px, 1.4vw, 18px); font-weight: 500;
  letter-spacing: -.02em; margin-bottom: 10px;
  color: var(--ink);
}
.rto-grid-v2 {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
}
@media (max-width: 760px) { .rto-grid-v2 { grid-template-columns: 1fr; } }

.rto-card-v2 {
  position: relative;
  border-radius: 16px;
  background: #fff;
  padding: clamp(14px, 2vh, 20px) clamp(16px, 1.8vw, 22px);
  border: 1.5px solid rgba(5,4,25,.08);
  overflow: hidden;
}
.rto-card-v2::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  border-radius: 3px 3px 0 0;
}
.rto-card-v2.rpo::before { background: linear-gradient(90deg, var(--accent-glow), var(--accent)); }
.rto-card-v2.rto::before { background: linear-gradient(90deg, #FF3A2F, #FF6B62); }

.rto-card-v2 .rto-label {
  display: inline-block; font-size: 10px; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase;
  margin-bottom: 6px;
}
.rto-card-v2.rpo .rto-label { color: var(--accent-glow); }
.rto-card-v2.rto .rto-label { color: #FF3A2F; }
.rto-card-v2 .rto-big {
  display: block; font-size: clamp(14px, 1.4vw, 17px); font-weight: 500;
  letter-spacing: -.02em; margin-bottom: 6px; color: var(--ink);
}
.rto-card-v2 p {
  color: var(--muted); font-size: clamp(11.5px, 1vw, 13.5px);
  line-height: 1.4; margin-bottom: 10px;
}

/* Big stat number */
.rto-stat-big {
  display: flex; align-items: baseline; gap: 8px;
  margin-top: 6px;
}
.rto-stat-num {
  font-size: clamp(32px, 4vw, 48px); font-weight: 500;
  line-height: 1; letter-spacing: -.03em;
}
.rto-card-v2.rpo .rto-stat-num { color: var(--accent-glow); }
.rto-card-v2.rto .rto-stat-num { color: #FF3A2F; }
.rto-stat-unit {
  font-size: 10px; font-weight: 500; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted);
}

/* Meter bar */
.rto-meter-v2 {
  height: 6px; border-radius: 3px;
  background: rgba(5,4,25,.08); overflow: hidden; margin-top: 6px;
}
.rto-meter-fill-v2 {
  height: 100%; border-radius: 3px;
  transform-origin: left;
  transition: transform 1.2s ease-out;
}
.rto-card-v2.rpo .rto-meter-fill-v2 { background: linear-gradient(90deg, var(--accent-glow), var(--accent)); }
.rto-card-v2.rto .rto-meter-fill-v2 { background: linear-gradient(90deg, #FF3A2F, #FF6B62); }
.rto-meter-labels-v2 {
  display: flex; justify-content: space-between;
  font-size: 9px; color: var(--muted); margin-top: 3px;
}

/* ============================================================
   PROJECT OVERVIEW SLIDE — NEW SLIDE #s-overview
   ============================================================ */

/* Infrastructure diagram — horizontal chain of nodes */
.infra-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin: clamp(10px, 1.5vh, 16px) 0;
  flex-wrap: wrap;
  padding: 12px 0;
  border-top: 1px solid rgba(5,4,25,.08);
  border-bottom: 1px solid rgba(5,4,25,.08);
}

.infra-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 10px 14px;
  border-radius: 14px;
  background: #fff;
  border: 1.5px solid rgba(5,4,25,.08);
  min-width: 90px;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  position: relative;
  overflow: hidden;
}
.infra-node:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px -10px rgba(5,4,25,.15);
  border-color: rgba(57,50,220,.25);
}

/* Node accent bar */
.infra-node::after {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  border-radius: 2px 2px 0 0;
}
.infra-node:nth-child(1)::after { background: linear-gradient(90deg, var(--accent-glow), var(--accent)); }
.infra-node:nth-child(2)::after { background: linear-gradient(90deg, var(--accent-glow), var(--accent)); }
.nas-node::after { background: linear-gradient(90deg, #0c7a45, #0F9D58); }
.infra-node:nth-child(4)::after { background: linear-gradient(90deg, #FF3A2F, #FF6B62); }
.infra-node:nth-child(5)::after { background: linear-gradient(90deg, #FF3A2F, #FF6B62); }

.infra-icon {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
}
.infra-icon svg { height: 100%; width: auto; stroke: var(--ink); }

.infra-label {
  font-size: clamp(12px, 1.1vw, 14px); font-weight: 600;
  color: var(--ink); letter-spacing: -.01em;
}
.infra-sub {
  font-size: 10px; color: var(--muted); letter-spacing: .04em;
  text-transform: uppercase;
}
.infra-ip {
  font-size: 10px; font-weight: 500; color: var(--accent-glow);
  letter-spacing: .04em; font-family: ui-monospace, monospace;
}

/* Team cards */
.team-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  margin: clamp(10px, 1.5vh, 16px) 0;
}
@media (max-width: 760px) { .team-grid { grid-template-columns: 1fr; } }

.team-card {
  border-radius: 16px;
  background: #fff;
  border: 1.5px solid rgba(5,4,25,.08);
  padding: clamp(12px, 1.8vh, 18px) clamp(14px, 1.6vw, 20px);
  display: flex; flex-direction: column; gap: 10px;
  transition: transform .3s ease, box-shadow .3s ease;
  overflow: hidden;
  position: relative;
}
.team-card:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -10px rgba(5,4,25,.12); }

.team-card::after {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  border-radius: 3px 3px 0 0;
}
.team-marios::after { background: linear-gradient(90deg, var(--accent-glow), var(--accent)); }
.team-christophe::after { background: linear-gradient(90deg, #FF3A2F, #FF6B62); }

.team-header {
  display: flex; align-items: center; gap: 12px;
}

.team-avatar {
  width: 48px; height: 48px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  flex: none;
}
.team-marios .team-avatar { background: rgba(57,50,220,.08); }
.team-marios .team-avatar svg { stroke: var(--accent-glow); }
.team-christophe .team-avatar { background: rgba(255,58,47,.08); }
.team-christophe .team-avatar svg { stroke: #FF3A2F; }

.team-name { display: flex; flex-direction: column; gap: 1px; }
.team-name-label {
  font-size: clamp(15px, 1.4vw, 18px); font-weight: 600;
  color: var(--ink); letter-spacing: -.01em;
}
.team-role {
  font-size: 11px; color: var(--muted); letter-spacing: .06em; text-transform: uppercase;
}

.team-details { display: flex; flex-direction: column; gap: 4px; }
.team-row {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 3px 0; border-bottom: 1px solid rgba(5,4,25,.06);
}
.team-row:last-child { border-bottom: none; }
.t-label {
  font-size: 11px; color: var(--muted); letter-spacing: .04em;
}
.t-val {
  font-size: 12px; font-weight: 500; color: var(--ink);
  font-family: ui-monospace, monospace;
}
.t-focus { color: var(--accent-glow); font-weight: 600; }
.team-christophe .t-focus { color: #FF3A2F; }

/* Network badge */
.net-badge {
  display: flex; align-items: center; justify-content: center;
  gap: 10px; flex-wrap: wrap;
  margin-top: clamp(8px, 1.2vh, 12px);
  padding: 8px 14px;
  border-radius: 20px;
  background: rgba(57,50,220,.05);
  border: 1px solid rgba(57,50,220,.12);
  font-size: 11px; color: var(--muted); letter-spacing: .04em;
}
.net-icon {
  width: 14px; height: 14px;
  display: flex; align-items: center; justify-content: center;
}
.net-icon svg { width: 100%; height: 100%; stroke: var(--accent-glow); }
.net-sep { color: rgba(5,4,25,.2); }

/* Reduced padding for the overview slide to fit all content */
#s-overview .slide-wrap { padding-top: calc(var(--header-h) + 6px); padding-bottom: 16px; }

/* Animation for infra nodes */
@keyframes infra-glow {
  0%, 100% { box-shadow: 0 0 0 rgba(57,50,220,0); }
  50% { box-shadow: 0 0 16px rgba(57,50,220,.12); }
}
.infra-node.visible { animation: infra-glow 2.5s ease-in-out infinite; }
.infra-node:nth-child(2).visible { animation-delay: .3s; }
.nas-node.visible { animation-delay: .6s; }
.infra-node:nth-child(4).visible { animation-delay: .9s; }
.infra-node:nth-child(5).visible { animation-delay: 1.2s; }