/* ============================================================
   ASPIRE 2026 — Chapter Experience
   Mobile-first, full-viewport, user-driven journey.
   Palette drawn from the event photography: venue dark,
   magenta/violet stage wash, ASPIRE red.
   ============================================================ */

:root {
  --bg: #0b0812;
  --bg-2: #140d22;
  --ink: #f7f4fb;
  --ink-dim: #c6bddb;
  --ink-faint: #948aad;
  --red: #e4032e;
  --red-soft: #ff2d55;
  --magenta: #d946ef;
  --violet: #7c3aed;
  --line: rgba(217, 70, 239, .2);
  --font-display: "Sora", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --ease: cubic-bezier(.22, .8, .28, 1);
  --ease-spring: cubic-bezier(.34, 1.45, .5, 1);
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --dur: 1s;
}

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

html, body {
  height: 100%;
  overflow: hidden;              /* the deck drives all movement */
  overscroll-behavior: none;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  touch-action: none;            /* we handle swipes ourselves */
  user-select: none;
}

img, video { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; background: none; border: 0; color: inherit; }
a { color: inherit; }

::selection { background: var(--magenta); color: #fff; }
:focus-visible { outline: 2px solid var(--magenta); outline-offset: 3px; border-radius: 6px; }

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

/* ---------------------------------------------------------- header */
.deck-header {
  position: fixed; z-index: 40;
  top: 0; left: 0; right: 0;
  padding: calc(10px + var(--safe-top)) 16px 10px;
  display: flex; align-items: center; gap: 14px;
  pointer-events: none;
}
.deck-header > * { pointer-events: auto; }
.wordmark {
  font-family: var(--font-display); font-weight: 800; font-size: 1.02rem;
  color: #fff; text-decoration: none; letter-spacing: .02em; flex: 0 0 auto;
}
.wordmark em { color: var(--red-soft); font-style: normal; }

.progress-track {
  flex: 1; display: flex; gap: 4px; align-items: center; min-width: 0;
}
.progress-track .seg {
  flex: 1; height: 2px; border-radius: 2px;
  background: rgba(255, 255, 255, .14);
  position: relative; overflow: hidden;
  transition: background .3s;
  padding: 0;
}
.progress-track .seg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, var(--red-soft), var(--magenta));
  transform: scaleX(0); transform-origin: left;
  transition: transform .5s var(--ease);
}
.progress-track .seg.done::after { transform: scaleX(1); }
.progress-track .seg { cursor: pointer; }
.progress-track .seg:hover { background: rgba(255,255,255,.3); }

.counter {
  flex: 0 0 auto; font-size: .72rem; font-weight: 600; letter-spacing: .14em;
  color: var(--ink-faint); font-variant-numeric: tabular-nums;
}

/* ---------------------------------------------------------- stage & slides */
#stage { position: fixed; inset: 0; }

.slide {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; justify-content: flex-end;
  opacity: 0; visibility: hidden;
  transform: translateY(3.2%);
  transition:
    opacity var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    visibility 0s linear var(--dur);
  pointer-events: none;
  z-index: 1;
}
.slide.is-active {
  opacity: 1; visibility: visible; transform: none;
  transition:
    opacity var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    visibility 0s;
  pointer-events: auto;
  z-index: 2;
}
.slide.is-prev { transform: translateY(-3.2%); }

/* full-bleed imagery */
.slide-bg { position: absolute; inset: 0; overflow: hidden; z-index: -1; }
.slide-bg img, .slide-bg video {
  width: 100%; height: 100%; object-fit: cover;
  filter: saturate(1.12) brightness(.72);
}
/* cinematic pans — slow, deliberate, each chapter breathing differently */
.slide.is-active .pan-a img { animation: pan-a 26s var(--ease) both; }
.slide.is-active .pan-b img { animation: pan-b 26s var(--ease) both; }
.slide.is-active .pan-c img { animation: pan-c 26s var(--ease) both; }
@keyframes pan-a {
  from { transform: scale(1.09) translate(-1.2%, 1%); }
  to   { transform: scale(1.02) translate(0, 0); }
}
@keyframes pan-b {
  from { transform: scale(1.04) translate(1.1%, 0); }
  to   { transform: scale(1.09) translate(-.6%, -.6%); }
}
@keyframes pan-c {
  from { transform: scale(1.1) translate(0, -1.4%); }
  to   { transform: scale(1.02) translate(0, .3%); }
}
.slide-bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(120% 70% at 50% 115%, rgba(124, 58, 237, .38), transparent 60%),
    linear-gradient(to top, rgba(11, 8, 18, .96) 8%, rgba(11, 8, 18, .58) 42%, rgba(11, 8, 18, .25) 70%, rgba(11, 8, 18, .45));
}

/* giant chapter number */
.big-no {
  position: absolute; top: calc(44px + var(--safe-top)); right: 10px;
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(5.5rem, 22vw, 12rem); line-height: 1;
  color: transparent; -webkit-text-stroke: 1.5px rgba(217, 70, 239, .26);
  user-select: none; pointer-events: none; z-index: 0;
  opacity: 0; transform: translateX(20px);
  transition: opacity 1s var(--ease) .25s, transform 1s var(--ease) .25s;
}
.slide.is-active .big-no { opacity: 1; transform: none; }

/* content block — bottom-anchored, story style.
   Overflow-proof everywhere: content taller than the viewport scrolls
   internally (invisible scrollbar) instead of bleeding under the header. */
.slide-content {
  position: relative; z-index: 1;
  padding: 0 20px calc(96px + var(--safe-bottom));
  max-width: 640px;
  width: 100%;
  max-height: 100svh;
  overflow-y: auto;
  touch-action: pan-y;
  overscroll-behavior: contain;
  scrollbar-width: none;
}
.slide-content::-webkit-scrollbar { display: none; }

/* staged reveals */
.slide .st {
  opacity: 0; transform: translateY(26px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.slide.is-active .st { opacity: 1; transform: none; }
.slide.is-active .st1 { transition-delay: .15s; }
.slide.is-active .st2 { transition-delay: .28s; }
.slide.is-active .st3 { transition-delay: .41s; }
.slide.is-active .st4 { transition-delay: .54s; }
.slide.is-active .st5 { transition-delay: .67s; }
.slide.is-active .st6 { transition-delay: .8s; }
.slide.is-active .st7 { transition-delay: .93s; }

.kicker {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--red-soft); font-weight: 700; font-size: .72rem;
  letter-spacing: .22em; text-transform: uppercase; margin-bottom: 12px;
}
.kicker::before { content: ""; width: 22px; height: 2px; background: var(--red); }

.slide h1, .slide h2 {
  font-family: var(--font-display); font-weight: 800; color: #fff;
  letter-spacing: -.02em; line-height: 1.08; text-wrap: balance;
}
.slide-session h2 { font-size: clamp(1.7rem, 6.5vw, 2.9rem); margin-bottom: 10px; }

.speakers { color: var(--ink-faint); font-size: .78rem; margin-bottom: 18px; line-height: 1.5; }

/* ------------------------------------------------ insight stepper */
.insight-deck { margin: 4px 0 14px; }
.insight-label {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 8px;
}
.insight-label span {
  font-size: .64rem; font-weight: 600; letter-spacing: .22em;
  text-transform: uppercase; color: var(--ink-faint); opacity: .85;
}
.insight-dots { display: flex; gap: 6px; }
.insight-dots i {
  width: 6px; height: 6px; border-radius: 50%;
  background: rgba(255, 255, 255, .22); transition: all .3s var(--ease);
}
.insight-dots i.on { background: var(--magenta); transform: scale(1.3); box-shadow: 0 0 8px rgba(217, 70, 239, .8); }

.insight-card {
  position: relative; width: 100%; text-align: left;
  background: rgba(23, 16, 40, .62);
  border: 1px solid rgba(217, 70, 239, .16); border-radius: 18px;
  padding: 18px 20px;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  min-height: 96px;
  display: flex; flex-direction: column; justify-content: center; gap: 10px;
  cursor: pointer;
  transition: border-color .3s, transform .2s var(--ease);
}
.insight-card:active { transform: scale(.985); }
.insight-card:hover { border-color: rgba(217, 70, 239, .5); }
.insight-card .txt {
  font-size: .88rem; color: var(--ink); line-height: 1.5;
  transition: opacity .3s var(--ease), transform .3s var(--ease);
}
.insight-card.switching .txt { opacity: 0; transform: translateY(10px); }
.insight-card .hint-tap {
  display: flex; align-items: center; gap: 8px;
  font-size: .68rem; font-weight: 600; letter-spacing: .12em;
  text-transform: uppercase; color: var(--magenta);
}
.insight-card .hint-tap::after { content: "→"; transition: transform .3s var(--ease-spring); }
.insight-card:hover .hint-tap::after { transform: translateX(4px); }

/* signature stat — the number that lands the session */
.sig-stat { display: flex; align-items: baseline; gap: 14px; margin: 2px 0 16px; }
.sig-num {
  font-family: var(--font-display); font-weight: 800; line-height: 1;
  font-size: clamp(2.1rem, 8vw, 3.4rem); letter-spacing: -.02em;
  background: linear-gradient(115deg, var(--red-soft), var(--magenta));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  white-space: nowrap;
}
.sig-label {
  font-size: .78rem; color: var(--ink-dim); line-height: 1.45;
  max-width: 300px; padding-bottom: 4px;
}

/* quote — hidden on short/small screens, lives in Go deeper too */
.quote { display: none; }

/* counter roll on chapter change */
.counter.roll { animation: counter-roll .5s var(--ease); }
@keyframes counter-roll {
  from { transform: translateY(55%); opacity: 0; }
  to { transform: none; opacity: 1; }
}

/* actions */
.slide-actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 24px; border-radius: 99px;
  font-weight: 700; font-size: .88rem; text-decoration: none;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .2s;
}
.btn-primary {
  color: #fff; background: linear-gradient(120deg, var(--red), var(--magenta));
  box-shadow: 0 8px 28px rgba(217, 70, 239, .35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 36px rgba(217, 70, 239, .5); }
.btn-ghost {
  color: var(--ink); background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .18);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, .14); transform: translateY(-2px); }

/* ------------------------------------------------ hero slide */
.slide-hero { justify-content: center; text-align: center; align-items: center; }
.slide-hero .slide-content {
  padding: calc(72px + var(--safe-top)) 24px calc(110px + var(--safe-bottom));
  max-width: 760px;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: .66rem; letter-spacing: .24em; text-transform: uppercase;
  color: var(--ink-dim); margin-bottom: 20px; justify-content: center;
}
.hero-eyebrow::before, .hero-eyebrow::after {
  content: ""; width: 26px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--magenta));
}
.hero-eyebrow::after { background: linear-gradient(90deg, var(--magenta), transparent); }
.slide-hero h1 { font-size: clamp(2.4rem, 9.5vw, 4.6rem); }
.slide-hero h1 .accent {
  background: linear-gradient(100deg, var(--red-soft), var(--magenta) 70%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { margin: 18px auto 6px; max-width: 520px; color: var(--ink-dim); font-size: .95rem; }
.hero-meta { font-size: .7rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 30px; }
.slide-hero .btn-primary { min-width: 220px; }

.begin-hint {
  position: absolute; left: 50%; transform: translateX(-50%);
  bottom: calc(88px + var(--safe-bottom));
  color: var(--ink-faint); font-size: .64rem; letter-spacing: .22em; text-transform: uppercase;
  animation: bob 2.4s ease-in-out infinite;
}
@keyframes bob { 50% { transform: translate(-50%, 7px); } }

/* ------------------------------------------------ vibe slide */
.slide-vibe { justify-content: center; align-items: center; text-align: center; }
.slide-vibe .slide-content {
  max-width: 900px;
  padding: calc(74px + var(--safe-top)) 18px calc(90px + var(--safe-bottom));
}
.slide-vibe h2 { font-size: clamp(1.7rem, 6vw, 2.6rem); margin-bottom: 8px; }
.slide-vibe .vibe-sub { color: var(--ink-dim); font-size: .88rem; max-width: 480px; margin: 0 auto 20px; }
.vibe-player {
  /* never taller than the space between header and nav */
  width: min(100%, calc((100svh - 330px) * 1.7778));
  margin: 0 auto;
  border-radius: 18px; overflow: hidden;
  box-shadow: 0 30px 90px rgba(0, 0, 0, .65), 0 0 0 1px rgba(217, 70, 239, .25);
}
.vibe-player video { width: 100%; aspect-ratio: 16 / 9; background: #000; }

/* ------------------------------------------------ threads slide (interactive infographic) */
.slide-threads { justify-content: flex-start; }
.slide-threads .slide-content {
  max-width: 980px; margin: 0 auto; width: 100%;
  padding: calc(78px + var(--safe-top)) 18px calc(90px + var(--safe-bottom));
  max-height: 100svh;
  overflow-y: auto;
  touch-action: pan-y;
  overscroll-behavior: contain;
  scrollbar-width: none;
}
.slide-threads .slide-content::-webkit-scrollbar { display: none; }
.slide-threads h2 { font-size: clamp(1.5rem, 5.5vw, 2.4rem); margin-bottom: 6px; }
.themes-sub { color: var(--ink-dim); font-size: .84rem; margin-bottom: 20px; max-width: 620px; }

.threads-wrap { position: relative; }
.thread-svg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 1; overflow: visible;
}
.thread-path {
  fill: none; stroke: url(#threadGrad), rgba(217, 70, 239, .75);
  stroke: rgba(217, 70, 239, .75);
  stroke-width: 1.5; stroke-linecap: round;
  filter: drop-shadow(0 0 6px rgba(217, 70, 239, .5));
}

/* the day as ten stops */
.day-strip {
  display: flex; justify-content: space-between; gap: 4px;
  padding: 6px 2px 18px; position: relative; z-index: 2;
}
.day-dot {
  position: relative; flex: 0 0 auto;
  width: clamp(28px, 7vw, 40px); height: clamp(28px, 7vw, 40px);
  border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(23, 16, 40, .8);
  border: 1px solid rgba(255, 255, 255, .14);
  transition: border-color .3s, background .3s, transform .3s var(--ease), box-shadow .3s;
}
.day-dot b { font-family: var(--font-display); font-weight: 800; font-size: .62rem; color: var(--ink-faint); transition: color .3s; }
.day-dot:hover { transform: translateY(-2px); border-color: rgba(217, 70, 239, .5); }
.day-dot.lit {
  border-color: var(--magenta);
  background: rgba(217, 70, 239, .16);
  box-shadow: 0 0 14px rgba(217, 70, 239, .55);
}
.day-dot.lit b { color: #fff; }
.day-tip {
  position: absolute; top: calc(100% + 6px); left: 50%; transform: translateX(-50%);
  white-space: nowrap; font-size: .62rem; font-weight: 600; color: var(--ink);
  background: rgba(23, 16, 40, .95); border: 1px solid var(--line);
  padding: 4px 10px; border-radius: 7px; opacity: 0; pointer-events: none;
  transition: opacity .2s; z-index: 5;
}
.day-dot:hover .day-tip, .day-dot:focus-visible .day-tip { opacity: 1; }

/* pattern pills + detail */
.threads-lower { position: relative; z-index: 2; padding-top: 26px; }
.thread-pills { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.thread-pill {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 10px 16px; border-radius: 99px; text-align: left;
  background: rgba(23, 16, 40, .72);
  border: 1px solid rgba(255, 255, 255, .13);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: border-color .25s, background .25s, transform .25s var(--ease);
}
.thread-pill:hover { transform: translateY(-1px); border-color: rgba(217, 70, 239, .45); }
.thread-pill b {
  font-family: var(--font-display); font-size: .68rem; font-weight: 800;
  background: linear-gradient(120deg, var(--red-soft), var(--magenta));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.thread-pill span { font-size: .78rem; font-weight: 600; color: var(--ink-dim); transition: color .25s; }
.thread-pill.active {
  border-color: var(--magenta);
  background: rgba(217, 70, 239, .15);
  box-shadow: 0 0 20px rgba(217, 70, 239, .3);
}
.thread-pill.active span { color: #fff; }

.thread-body {
  font-size: .88rem; color: var(--ink-dim); max-width: 640px; margin-bottom: 14px;
  animation: rise-in .5s var(--ease) both;
}
@keyframes rise-in { from { opacity: 0; transform: translateY(12px); } }

.evidence-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 10px; }
.evidence-card {
  display: flex; gap: 12px; align-items: flex-start; text-align: left;
  background: rgba(23, 16, 40, .72);
  border: 1px solid var(--line); border-radius: 14px; padding: 14px 15px;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  opacity: 0; transform: translateY(16px);
  transition: opacity .55s var(--ease), transform .55s var(--ease), border-color .25s, box-shadow .25s;
}
.evidence-card.in { opacity: 1; transform: none; }
.evidence-card:hover { border-color: var(--magenta); box-shadow: 0 8px 30px rgba(217, 70, 239, .2); }
.ev-num {
  flex: 0 0 30px; height: 30px; border-radius: 9px;
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 800; font-size: .7rem; color: #fff;
  background: linear-gradient(135deg, rgba(228, 3, 46, .3), rgba(217, 70, 239, .3));
}
.ev-meta { display: grid; gap: 3px; min-width: 0; }
.ev-meta strong { font-family: var(--font-display); font-size: .72rem; font-weight: 700; color: var(--ink-faint); letter-spacing: .06em; text-transform: uppercase; }
.ev-meta em { font-style: normal; font-size: .8rem; color: var(--ink); line-height: 1.45; }
.ev-go { font-style: normal; font-size: .68rem; font-weight: 700; color: var(--magenta); letter-spacing: .08em; text-transform: uppercase; margin-top: 3px; opacity: 0; transform: translateX(-4px); transition: opacity .25s, transform .25s var(--ease); }
.evidence-card:hover .ev-go, .evidence-card:focus-visible .ev-go { opacity: 1; transform: none; }

/* ------------------------------------------------ finale slide */
.slide-finale { justify-content: center; text-align: center; align-items: center; }
.slide-finale .slide-content {
  max-width: 720px;
  padding: calc(80px + var(--safe-top)) 20px calc(100px + var(--safe-bottom));
}
.finale-quote {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.25rem, 5vw, 2rem); line-height: 1.3; color: #fff;
  text-wrap: balance;
}
.finale-quote .accent {
  background: linear-gradient(100deg, var(--red-soft), var(--magenta));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.finale-sub { color: var(--ink-dim); font-size: .9rem; margin: 16px 0 30px; }
.finale-ctas { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }
.credits { font-size: .74rem; color: var(--ink-faint); line-height: 1.9; }
.powered {
  display: inline-flex; align-items: center; gap: 12px; text-decoration: none;
  font-size: .72rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-faint); margin-top: 14px;
  transition: opacity .25s;
}
.powered .odco-logo {
  height: 20px; width: auto;
  opacity: .9;
  transition: opacity .25s, transform .3s var(--ease);
}
.powered:hover { color: var(--ink-dim); }
.powered:hover .odco-logo { opacity: 1; transform: translateY(-1px); }

/* ---------------------------------------------------------- deck nav */
.deck-nav {
  position: fixed; z-index: 40;
  bottom: calc(14px + var(--safe-bottom)); left: 16px; right: 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  pointer-events: none;
}
.deck-nav > * { pointer-events: auto; }
.nav-arrows { display: flex; gap: 8px; }
.nav-btn {
  width: 52px; height: 52px; border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(23, 16, 40, .74);
  border: 1px solid rgba(217, 70, 239, .3);
  color: #fff; font-size: 1.05rem;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  transition: transform .25s var(--ease), background .2s, opacity .3s, border-color .2s;
}
.nav-btn:hover { background: rgba(217, 70, 239, .22); transform: translateY(-2px); border-color: var(--magenta); }
.nav-btn:disabled { opacity: .25; pointer-events: none; }
.nav-label {
  font-size: .68rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-faint); text-align: right;
  max-width: 38vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.nav-label strong { display: block; color: var(--ink-dim); font-weight: 700; }

/* persistent, quiet credit — visible on every chapter */
.nav-powered {
  position: absolute; left: 50%; bottom: 16px; transform: translateX(-50%);
  display: inline-flex; align-items: center; gap: 9px;
  text-decoration: none; padding: 8px 12px; border-radius: 99px;
  opacity: .62;
  transition: opacity .3s;
}
.nav-powered:hover { opacity: 1; }
.nav-powered span {
  font-size: .6rem; font-weight: 600; letter-spacing: .18em; text-transform: uppercase;
  color: var(--ink-faint); white-space: nowrap;
}
.nav-powered img { height: 13px; width: auto; display: block; }
@media (max-width: 640px) {
  .nav-powered span { display: none; }
  .nav-powered img { height: 12px; }
  .nav-powered { bottom: 20px; }
}

/* ---------------------------------------------------------- rail (desktop) */
.rail { display: none; }

/* ---------------------------------------------------------- go-deeper overlay */
.deeper {
  position: fixed; inset: 0; z-index: 60;
  visibility: hidden; pointer-events: none;
}
.deeper.open { visibility: visible; pointer-events: auto; }
.deeper-scrim {
  position: absolute; inset: 0;
  background: rgba(8, 6, 16, .7);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  opacity: 0; transition: opacity .4s;
}
.deeper.open .deeper-scrim { opacity: 1; }
.deeper-panel {
  position: absolute; inset: auto 0 0 0;
  max-height: calc(100% - 56px - var(--safe-top));
  background: linear-gradient(180deg, #1d1332, #120c20);
  border: 1px solid rgba(217, 70, 239, .3); border-bottom: 0;
  border-radius: 24px 24px 0 0;
  transform: translateY(103%);
  transition: transform .55s var(--ease);
  display: flex; flex-direction: column;
  box-shadow: 0 -30px 90px rgba(0, 0, 0, .6);
}
.deeper.open .deeper-panel { transform: none; }
.deeper-grip {
  flex: 0 0 auto; padding: 12px 0 4px; display: grid; place-items: center;
}
.deeper-grip::before {
  content: ""; width: 44px; height: 4px; border-radius: 2px;
  background: rgba(255, 255, 255, .22);
}
.deeper-head {
  flex: 0 0 auto; padding: 8px 22px 14px;
  display: flex; align-items: flex-start; gap: 14px;
  border-bottom: 1px solid rgba(217, 70, 239, .14);
}
.deeper-head .kicker { margin-bottom: 4px; }
.deeper-head h3 {
  font-family: var(--font-display); font-weight: 800; color: #fff;
  font-size: 1.2rem; line-height: 1.2;
}
.deeper-close {
  margin-left: auto; flex: 0 0 auto;
  width: 40px; height: 40px; border-radius: 50%;
  background: rgba(255, 255, 255, .08); color: var(--ink-dim);
  display: grid; place-items: center; font-size: .95rem;
}
.deeper-close:hover { background: rgba(255, 255, 255, .16); color: #fff; }
.deeper-body {
  overflow-y: auto; -webkit-overflow-scrolling: touch;
  padding: 20px 22px calc(28px + var(--safe-bottom));
  overscroll-behavior: contain;
  user-select: text;
}
.deeper-body .speakers { margin-bottom: 16px; }
.deeper-body .narrative p { color: var(--ink-dim); font-size: .92rem; margin-bottom: 14px; }
.deeper-body h4 {
  font-family: var(--font-display); font-size: .72rem; font-weight: 700;
  letter-spacing: .2em; text-transform: uppercase; color: var(--red-soft);
  margin: 22px 0 12px;
}
.deeper-insight {
  display: flex; gap: 12px; align-items: flex-start;
  background: rgba(255, 255, 255, .04); border: 1px solid var(--line);
  border-radius: 12px; padding: 12px 15px; margin-bottom: 10px;
}
.deeper-insight .spark {
  flex: 0 0 auto; width: 22px; height: 22px; border-radius: 7px; margin-top: 1px;
  display: grid; place-items: center; font-size: .62rem; font-weight: 800;
  background: linear-gradient(135deg, rgba(228, 3, 46, .25), rgba(217, 70, 239, .25));
  color: var(--magenta);
}
.deeper-insight p { font-size: .85rem; color: var(--ink-dim); }
.deeper-quote {
  margin-top: 20px; padding: 16px 20px;
  border-left: 3px solid var(--red);
  background: linear-gradient(90deg, rgba(228, 3, 46, .09), transparent 75%);
  border-radius: 0 12px 12px 0;
}
.deeper-quote p { font-family: var(--font-display); font-size: 1rem; color: #fff; line-height: 1.45; }
.deeper-quote cite { display: block; margin-top: 8px; font-style: normal; font-size: .72rem; color: var(--ink-faint); letter-spacing: .1em; text-transform: uppercase; }

/* ---------------------------------------------------------- desktop enhancements */
@media (min-width: 900px) {
  body { font-size: 17px; }

  .deck-header { padding: 18px 28px 12px; gap: 22px; }
  .wordmark { font-size: 1.15rem; }
  .progress-track { max-width: 520px; margin: 0 auto; }
  .counter { font-size: .76rem; }

  .slide-content { padding: 0 72px calc(110px + var(--safe-bottom)); max-width: 720px; }
  /* overflow-proof centring: when content is taller than the viewport it stays
     anchored to its own top padding instead of bleeding under the header */
  .slide-session, .slide-vibe, .slide-finale { justify-content: flex-start; }
  .slide-session .slide-content, .slide-vibe .slide-content, .slide-finale .slide-content {
    margin-top: auto; margin-bottom: auto;
    max-height: 100svh; overflow-y: auto;
    scrollbar-width: none;
  }
  .slide-session .slide-content::-webkit-scrollbar,
  .slide-vibe .slide-content::-webkit-scrollbar,
  .slide-finale .slide-content::-webkit-scrollbar { display: none; }
  .slide-session .slide-content {
    max-width: 640px;
    padding: calc(70px + var(--safe-top)) 72px calc(100px + var(--safe-bottom));
  }

  /* split layout on wide screens: image right, content left */
  .slide-session .slide-bg::after {
    background:
      radial-gradient(90% 80% at 85% 110%, rgba(124, 58, 237, .3), transparent 55%),
      linear-gradient(to right, rgba(11, 8, 18, .97) 30%, rgba(11, 8, 18, .72) 55%, rgba(11, 8, 18, .3) 85%);
  }
  .big-no { top: auto; bottom: 40px; right: 44px; font-size: clamp(8rem, 16vw, 15rem); }

  .slide-session h2 { font-size: clamp(2.2rem, 3.6vw, 3.3rem); margin-bottom: 14px; }
  .speakers { font-size: .85rem; margin-bottom: 24px; }
  .insight-card { min-height: 122px; padding: 20px 24px 16px; }
  .insight-card .txt { font-size: .95rem; }

  /* quote visible on desktop */
  .quote {
    display: block; margin: 20px 0 22px; padding: 14px 20px;
    border-left: 3px solid var(--red);
    background: linear-gradient(90deg, rgba(228, 3, 46, .09), transparent 75%);
    border-radius: 0 12px 12px 0;
  }
  .quote p { font-family: var(--font-display); font-size: 1.02rem; color: #fff; line-height: 1.4; }
  .quote cite { display: block; margin-top: 6px; font-style: normal; font-size: .7rem; color: var(--ink-faint); letter-spacing: .12em; text-transform: uppercase; }

  .deck-nav { bottom: 24px; left: 28px; right: 28px; }
  .nav-label { max-width: 300px; }

  /* rail */
  .rail {
    display: flex; position: fixed; left: 22px; top: 50%;
    transform: translateY(-50%); z-index: 40;
    flex-direction: column; gap: 9px;
  }
  .rail button {
    width: 9px; height: 9px; border-radius: 50%; padding: 0;
    background: rgba(255, 255, 255, .18); position: relative;
    transition: background .3s, transform .3s;
  }
  .rail button.active {
    background: var(--magenta); transform: scale(1.5);
    box-shadow: 0 0 12px rgba(217, 70, 239, .8);
  }
  .rail button .tip {
    position: absolute; left: 20px; top: 50%;
    transform: translateY(-50%) translateX(-6px);
    white-space: nowrap; font-size: .7rem; font-weight: 600; color: var(--ink);
    background: rgba(23, 16, 40, .95); border: 1px solid var(--line);
    padding: 5px 12px; border-radius: 8px; opacity: 0; pointer-events: none;
    transition: opacity .2s, transform .2s;
  }
  .rail button:hover .tip, .rail button:focus-visible .tip {
    opacity: 1; transform: translateY(-50%) translateX(0);
  }

  /* go-deeper becomes a centred sheet */
  .deeper-panel {
    inset: 50% auto auto 50%;
    width: min(760px, calc(100vw - 80px));
    max-height: min(78vh, 780px);
    border-radius: 24px; border-bottom: 1px solid rgba(217, 70, 239, .3);
    transform: translate(-50%, -46%) scale(.97);
    opacity: 0;
    transition: transform .45s var(--ease), opacity .35s;
  }
  .deeper.open .deeper-panel { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  .deeper-grip { display: none; }
  .deeper-head { padding: 26px 30px 18px; }
  .deeper-head h3 { font-size: 1.5rem; }
  .deeper-body { padding: 24px 30px 30px; }

  .themes-sub { font-size: .95rem; }
  .slide-threads .slide-content { max-width: 980px; }
  .thread-pill span { font-size: .84rem; }
  .day-strip { padding-bottom: 24px; }
  .sig-label { max-width: 340px; font-size: .82rem; }

  /* quote reads as a quiet interactive layer on desktop */
  .quote { cursor: pointer; position: relative; transition: background .3s, transform .3s var(--ease); }
  .quote:hover { background: linear-gradient(90deg, rgba(228, 3, 46, .16), transparent 80%); transform: translateX(3px); }
  .quote::after {
    content: "Read the full story →";
    position: absolute; right: 14px; bottom: 10px;
    font-size: .64rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
    color: var(--magenta); opacity: 0; transform: translateX(-6px);
    transition: opacity .25s, transform .25s var(--ease);
  }
  .quote:hover::after, .quote:focus-visible::after { opacity: 1; transform: none; }
}

/* shorter laptops: the quote yields so the whole chapter fits without scrolling */
@media (min-width: 900px) and (max-height: 840px) {
  .quote { display: none; }
  .slide-session h2 { font-size: clamp(1.9rem, 3vw, 2.7rem); }
  .sig-num { font-size: 2.5rem; }
  .speakers { margin-bottom: 14px; }
  .insight-card { min-height: 100px; }
  .slide-session .slide-content { padding-top: calc(60px + var(--safe-top)); }
}

/* very short screens: tighten */
@media (max-height: 640px) {
  .slide-session h2 { font-size: 1.45rem; }
  .speakers { margin-bottom: 10px; }
  .insight-card { min-height: 96px; }
  .big-no { opacity: .5; font-size: 4.6rem; }
}

/* ---------------------------------------------------------- word cascade */
.slide h2.split .w {
  display: inline-block;
  opacity: 0; transform: translateY(.45em);
  filter: blur(5px);
  transition: opacity .75s var(--ease), transform .75s var(--ease), filter .75s var(--ease);
}
.slide.is-active h2.split .w { opacity: 1; transform: none; filter: blur(0); }

/* cinematic sheen sweeping across on chapter entry */
.slide::before {
  content: ""; position: absolute; inset: 0; z-index: 3; pointer-events: none;
  background: linear-gradient(115deg, transparent 32%, rgba(255, 255, 255, .035) 48%, rgba(217, 70, 239, .055) 52%, transparent 68%);
  transform: translateX(-120%); opacity: 0;
}
.slide.is-active::before { animation: sheen 2.4s var(--ease) .15s; }
@keyframes sheen {
  0% { transform: translateX(-120%); opacity: 1; }
  100% { transform: translateX(120%); opacity: 0; }
}

/* big number blur-in */
.big-no { filter: blur(10px); }
.slide.is-active .big-no { filter: blur(0); transition: opacity 1s var(--ease) .25s, transform 1s var(--ease) .25s, filter 1s var(--ease) .25s; }

/* current progress segment breathes */
.progress-track .seg.now::after { transform: scaleX(1); animation: segpulse 2.2s ease-in-out infinite; }
@keyframes segpulse { 50% { opacity: .55; } }

/* insight card swap gets depth */
.insight-card { perspective: 600px; }
.insight-card.switching .txt { opacity: 0; transform: translateY(12px) rotateX(-14deg); }

/* ---------------------------------------------------------- menu button */
.menu-btn {
  flex: 0 0 auto; display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: 99px;
  background: rgba(23, 16, 40, .7); border: 1px solid rgba(217, 70, 239, .3);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  transition: background .2s, border-color .2s;
}
.menu-btn:hover { background: rgba(217, 70, 239, .18); border-color: var(--magenta); }
.menu-btn span {
  display: block; width: 14px; height: 2px; border-radius: 1px;
  background: var(--ink); margin: 1.5px 0;
}
.menu-btn span + span { margin-top: 2px; }
.menu-btn span:nth-child(2) { width: 10px; }
.menu-btn span:nth-child(3) { width: 12px; }
.menu-btn b {
  font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink);
}
.menu-btn { flex-direction: row; }
.menu-btn > span:first-child { margin-left: 2px; }
@media (max-width: 560px) { .menu-btn b { display: none; } .menu-btn { padding: 12px 13px; } }

/* ---------------------------------------------------------- day at a glance */
.menu { position: fixed; inset: 0; z-index: 70; visibility: hidden; pointer-events: none; }
.menu.open { visibility: visible; pointer-events: auto; }
.menu-scrim {
  position: absolute; inset: 0; background: rgba(8, 6, 16, .82);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  opacity: 0; transition: opacity .35s;
}
.menu.open .menu-scrim { opacity: 1; }
.menu-panel {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  padding-top: var(--safe-top);
  opacity: 0; transform: scale(1.04);
  transition: opacity .4s var(--ease), transform .5s var(--ease);
}
.menu.shown .menu-panel { opacity: 1; transform: none; }
.menu-head {
  flex: 0 0 auto; display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
  padding: 26px clamp(18px, 4vw, 44px) 18px;
}
.menu-title { font-family: var(--font-display); font-weight: 800; color: #fff; font-size: clamp(1.3rem, 3.5vw, 2rem); margin: 4px 0 4px; }
.menu-sub { font-size: .76rem; color: var(--ink-faint); letter-spacing: .06em; }
.menu-close {
  flex: 0 0 auto; width: 44px; height: 44px; border-radius: 50%;
  background: rgba(255, 255, 255, .08); color: var(--ink-dim);
  display: grid; place-items: center; font-size: .95rem;
  border: 1px solid rgba(255, 255, 255, .12);
}
.menu-close:hover { background: rgba(255, 255, 255, .16); color: #fff; }
.menu-list {
  overflow-y: auto; -webkit-overflow-scrolling: touch; overscroll-behavior: contain;
  padding: 4px clamp(18px, 4vw, 44px) calc(30px + var(--safe-bottom));
  display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  scrollbar-width: thin; scrollbar-color: rgba(217, 70, 239, .4) transparent;
  touch-action: pan-y;
}
@media (min-width: 900px) { .menu-list { grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 14px; } }

.ov-tile {
  position: relative; border-radius: 16px; overflow: hidden;
  aspect-ratio: 4 / 3; text-align: left; padding: 0;
  border: 1px solid rgba(255, 255, 255, .1);
  opacity: 0; transform: translateY(18px) scale(.97);
  transition: opacity .5s var(--ease), transform .5s var(--ease), border-color .25s, box-shadow .3s;
}
.menu.shown .ov-tile { opacity: 1; transform: none; }
.ov-tile:hover { border-color: var(--magenta); box-shadow: 0 14px 44px rgba(217, 70, 239, .3); }
.ov-tile:hover .ov-img { transform: scale(1.07); }
.ov-tile.here { border-color: var(--magenta); box-shadow: 0 0 0 2px rgba(217, 70, 239, .55), 0 14px 44px rgba(217, 70, 239, .25); }
.ov-img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  filter: saturate(1.1) brightness(.85);
  transition: transform .6s var(--ease);
}
.ov-shade {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(8, 6, 16, .92) 18%, rgba(8, 6, 16, .25) 55%, rgba(8, 6, 16, .2));
}
.ov-meta {
  position: absolute; left: 12px; right: 10px; bottom: 10px;
  display: flex; gap: 9px; align-items: flex-end;
}
.ov-num {
  flex: 0 0 auto; font-family: var(--font-display); font-weight: 800; font-size: .72rem;
  width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--red), var(--magenta)); color: #fff;
  margin-bottom: 2px;
}
.ov-txt { display: grid; min-width: 0; }
.ov-txt strong { font-family: var(--font-display); font-weight: 700; font-size: .8rem; color: #fff; line-height: 1.25; }
.ov-txt em {
  font-style: normal; font-size: .66rem; color: var(--ink-dim);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* session resources — in the main view, quiet but present */
.res-row {
  display: flex; flex-wrap: wrap; gap: 6px 22px;
  margin-top: 16px; align-items: center;
}
.res-link {
  display: inline-flex; align-items: center; gap: 9px;
  text-decoration: none; padding: 6px 0;
  font-size: .8rem; font-weight: 600; letter-spacing: .01em;
  color: var(--ink-dim);
  border-bottom: 1px solid transparent;
  transition: color .25s, border-color .25s;
}
.res-link:hover { color: #fff; border-bottom-color: var(--magenta); }
.res-ic {
  width: 24px; height: 24px; border-radius: 8px; flex: 0 0 auto;
  display: grid; place-items: center; font-style: normal; font-size: .6rem;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .14);
  color: var(--ink);
  transition: background .25s, border-color .25s;
}
.res-link:hover .res-ic { border-color: var(--magenta); background: rgba(217, 70, 239, .16); }
.res-play {
  padding-left: 2px;
  background: linear-gradient(135deg, rgba(228, 3, 46, .35), rgba(217, 70, 239, .35));
}

/* insight rhythm line — shows the card breathing, pauses when you linger */
.insight-progress {
  position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  transform: scaleX(0); transform-origin: left;
  background: linear-gradient(90deg, var(--red-soft), var(--magenta));
  opacity: .45; border-radius: 0 0 16px 16px;
}
.insight-progress.run { animation: cycle-fill 7s linear forwards; }
.insight-card:hover .insight-progress.run { animation-play-state: paused; }
@keyframes cycle-fill { to { transform: scaleX(1); } }

/* ---------------------------------------------------------- deeper extras */
.btn-icon { gap: 8px; }
.deeper-figure { margin: 4px 0 8px; }
.deeper-figure img { border-radius: 12px; border: 1px solid var(--line); background: #fff; }
.deeper-figure figcaption { font-size: .74rem; color: var(--ink-faint); margin-top: 8px; }
.slide-links { display: grid; gap: 10px; }
.slide-link {
  display: flex; align-items: center; gap: 14px; text-decoration: none;
  background: rgba(255, 255, 255, .04); border: 1px solid var(--line);
  border-radius: 14px; padding: 14px 16px;
  transition: border-color .25s, background .25s, transform .25s var(--ease);
}
.slide-link:hover { border-color: var(--magenta); background: rgba(217, 70, 239, .09); transform: translateY(-1px); }
.slide-link .doc-ic {
  flex: 0 0 40px; height: 40px; border-radius: 11px;
  display: grid; place-items: center; font-size: 1rem;
  background: linear-gradient(135deg, rgba(228, 3, 46, .22), rgba(217, 70, 239, .22));
  color: #fff;
}
.slide-link .doc-meta { display: grid; min-width: 0; }
.slide-link .doc-meta strong { font-size: .88rem; color: #fff; font-weight: 700; }
.slide-link .doc-meta em { font-style: normal; font-size: .72rem; color: var(--ink-faint); }

/* ---------------------------------------------------------- reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    transition-delay: 0s !important;
  }
  .slide.is-active .slide-bg img { animation: none; }
}