/* =============================================================
   Bifrost Advisory Board — deck stylesheet
   Full-screen scroll-snap presentation. 17 slides.
   Nordic-editorial system; Bifrost aurora used as a quiet accent.
   ============================================================= */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.6;
}

body {
  background:
    radial-gradient(1200px 800px at 18% 30%, #fffcf7 0%, var(--paper) 55%, #f4efe2 100%);
}

img { display: block; max-width: 100%; }

/* ───────────────────── Scroll-snap scaffolding ───────────────────── */
.deck {
  height: 100vh;
  height: 100dvh;
  overflow-y: scroll;
  overflow-x: hidden;
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;          /* Firefox — hide the bar, the dot-nav is the wayfinder */
}
.deck::-webkit-scrollbar { width: 0; height: 0; }

.slide {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: grid;
  place-items: center;
  padding: clamp(4rem, 9vh, 7rem) var(--edge) clamp(5rem, 11vh, 8rem);
  overflow: hidden;
}

/* Inner column — keeps content measured and centred */
.slide-inner {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
}

/* Reveal-on-enter — subtle fade/rise, applied by the IntersectionObserver.
   Gated behind `.js` so the deck stays fully visible if the script fails
   to load (graceful degradation — content over animation). */
.js .reveal > * {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 720ms var(--ease-entrance), transform 720ms var(--ease-entrance);
}
.slide.in-view .reveal > * { opacity: 1; transform: none; }
.slide.in-view .reveal > *:nth-child(2) { transition-delay: 90ms; }
.slide.in-view .reveal > *:nth-child(3) { transition-delay: 170ms; }
.slide.in-view .reveal > *:nth-child(4) { transition-delay: 250ms; }
.slide.in-view .reveal > *:nth-child(5) { transition-delay: 330ms; }

@media (prefers-reduced-motion: reduce) {
  .deck { scroll-behavior: auto; }
  .reveal > * { opacity: 1 !important; transform: none !important; transition: none !important; }
}

/* ───────────────────── Persistent chrome ───────────────────── */
/* Top-left wordmark — quiet masthead present on every slide */
.masthead {
  position: fixed;
  top: clamp(20px, 3vh, 34px);
  left: clamp(22px, 3vw, 44px);
  z-index: 60;
  width: clamp(92px, 9vw, 124px);
  opacity: 0.82;
  pointer-events: none;
}
.masthead img { width: 100%; height: auto; }

/* Slide number — quiet top-right counter */
.slide-counter {
  position: fixed;
  top: clamp(22px, 3vh, 36px);
  right: clamp(24px, 3vw, 46px);
  z-index: 60;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(0.85rem, 1.1vw, 1rem);
  color: var(--ink-dim);
  letter-spacing: 0.02em;
}
.slide-counter b { font-style: normal; font-weight: 600; color: var(--ink-soft); }

/* ───────────────────── Dot-nav (bottom) ─────────────────────
   17 dots, centred. Active = filled ink. Hover/focus floats a
   Danish label tooltip above the dot. Every slide is reachable. */
.dot-nav-tray {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: 96px;
  z-index: 45;
  pointer-events: none;
  background: linear-gradient(to bottom,
    rgba(250,246,238,0) 0%,
    rgba(250,246,238,0.82) 55%,
    rgba(250,246,238,0.96) 100%);
}
.dot-nav {
  position: fixed;
  bottom: clamp(20px, 3.2vh, 34px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: clamp(10px, 1.4vw, 20px);
  z-index: 50;
  max-width: 94vw;
  flex-wrap: wrap;
  justify-content: center;
}
.dot-btn {
  all: unset;
  position: relative;
  padding: 9px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.dot-btn .dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: transparent;
  box-shadow: inset 0 0 0 1.5px var(--ink-dim);
  transition: background var(--dur-fast) var(--ease),
              box-shadow var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease);
}
.dot-btn:hover .dot,
.dot-btn:focus-visible .dot { box-shadow: inset 0 0 0 1.5px var(--ink); transform: scale(1.15); }
.dot-btn.is-active .dot {
  background: var(--ink);
  box-shadow: inset 0 0 0 1.5px var(--ink);
}
.dot-btn .label {
  position: absolute;
  bottom: calc(100% - 3px);
  left: 50%;
  transform: translate(-50%, 4px);
  background: var(--paper-high);
  color: var(--ink);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
  padding: 7px 11px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  box-shadow:
    0 0 0 0.5px rgba(56,56,49,0.08),
    0 10px 18px -10px rgba(56,56,49,0.24),
    0 2px 6px -3px rgba(56,56,49,0.1);
  transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.dot-btn:hover .label,
.dot-btn:focus-visible .label { opacity: 1; transform: translate(-50%, 0); }
.dot-btn .label::before {
  content: counter(dot) " · ";
  color: var(--ink-dim);
}
.dot-nav { counter-reset: dot; }
.dot-btn { counter-increment: dot; }

/* ───────────────────── Shared editorial primitives ───────────────────── */
.eyebrow {
  font-family: var(--font-sans);
  font-size: clamp(0.72rem, 0.95vw, 0.84rem);
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--ink-dim);
  font-weight: 600;
  margin: 0 0 var(--space-5);
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
}
.eyebrow::before {
  content: "";
  width: 30px; height: 1px;
  background: currentColor;
}
.eyebrow.center { justify-content: center; }

.slide-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.1rem, 4.4vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.022em;
  color: var(--ink);
  margin: 0;
  text-wrap: pretty;
}
.slide-title em { font-style: italic; font-weight: 600; color: var(--terracotta); }

.lede {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.15rem, 1.7vw, 1.5rem);
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: 46ch;
  margin: var(--space-5) 0 0;
}

/* Thin aurora rule — the signature Bifrost accent line */
.aurora-rule {
  height: 2px;
  border: 0;
  border-radius: 2px;
  background: linear-gradient(to right,
    var(--aurora-1), var(--aurora-2), var(--aurora-3), var(--aurora-4));
  opacity: 0.9;
}

/* ════════════════════ THE BIG-QUESTION COMPONENT ════════════════════
   Reusable "pause and think" treatment (slides 5, 8, 9, 13, 16).
   Large confident serif, centred, lots of air. A short aurora rule and
   an aurora-tinted opening mark are the only colour. Deliberately calm. */
.question {
  text-align: center;
  max-width: min(92vw, 920px);   /* generous frame; the text controls the measure */
  margin-inline: auto;
  display: grid;
  justify-items: center;
  gap: clamp(1.6rem, 4vh, 2.6rem);
}
.question-mark {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1;
  background: linear-gradient(120deg, var(--aurora-1), var(--aurora-2), var(--aurora-3), var(--aurora-4));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0.9;
  user-select: none;
}
.question-eyebrow {
  font-family: var(--font-sans);
  font-size: clamp(0.72rem, 0.95vw, 0.82rem);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-dim);
  font-weight: 600;
}
.question-text {
  font-family: var(--font-serif);
  font-weight: 360;
  font-size: clamp(1.9rem, 3.8vw, 3.4rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
  max-width: 100%;
  text-wrap: balance;
}
/* A restrained aurora wash on the emphasised keyword */
.question-text em {
  font-style: italic;
  font-weight: 460;
  background: linear-gradient(115deg, var(--aurora-2), var(--aurora-3), var(--aurora-4));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.question-rule {
  width: clamp(70px, 9vw, 120px);
  height: 2px;
  border: 0;
  border-radius: 2px;
  background: linear-gradient(to right,
    var(--aurora-1), var(--aurora-2), var(--aurora-3), var(--aurora-4));
}
.question-prompts {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1rem, 1.5vw, 1.3rem);
  color: var(--ink-soft);
  margin: 0;
  max-width: 40ch;
  line-height: 1.7;
}
.question-prompts span { white-space: nowrap; }
.question-prompts .sep { color: var(--ink-faint); font-style: normal; padding: 0 0.35em; }

/* ════════════════════ Logo lockups ════════════════════ */
/* The Bifrost logo: aurora arc above a Newsreader wordmark. Reusable. */
.bifrost-logo {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35em;
  line-height: 1;
}
.bifrost-logo .arc {
  width: 1.7em;
  height: 0.85em;
  overflow: visible;
}
.bifrost-logo .word {
  font-family: var(--font-serif);
  font-weight: 420;
  letter-spacing: -0.012em;
  color: var(--ink);
}
.bifrost-logo .word em { font-style: italic; }
/* size variants driven by font-size on the lockup */
.bifrost-logo { font-size: clamp(1.6rem, 3.4vw, 2.6rem); }
.bifrost-logo.lg { font-size: clamp(2.4rem, 6vw, 5rem); }
.bifrost-logo.sm { font-size: clamp(1.15rem, 2vw, 1.5rem); }

/* Fenja · Bifrost combined lockup (mission + closing slides) */
.brand-lockup {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(1.4rem, 3.5vw, 3rem);
  flex-wrap: wrap;
}
.brand-lockup .fenja-mark { width: clamp(150px, 18vw, 270px); height: auto; opacity: 0.92; }
.brand-lockup .dot-sep {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.2rem);
  color: var(--ink-dim);
  line-height: 1;
  transform: translateY(-0.08em);
}

/* ════════════════════ Slide 1 — Ambient welcome ════════════════════ */
#slide-welcome { place-items: center; }
#slide-welcome .slide-inner { text-align: center; display: grid; justify-items: center; gap: clamp(1.6rem, 4vh, 2.6rem); }
.welcome-kicker {
  font-family: var(--font-sans);
  font-size: clamp(0.74rem, 1vw, 0.9rem);
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--ink-dim);
  font-weight: 600;
}
.welcome-headline {
  font-family: var(--font-serif);
  font-weight: 350;
  font-size: clamp(2.2rem, 5.2vw, 4.6rem);
  line-height: 1.07;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin: 0;
  max-width: 18ch;
  text-wrap: balance;
}
.welcome-headline .seq {
  font-style: italic;
  font-weight: 500;
  background: linear-gradient(115deg, var(--aurora-1), var(--aurora-2), var(--aurora-3), var(--aurora-4));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Ambient aurora background — full-bleed, slow looping. Lives behind
   slide 1's content. Three drifting aurora bands + the signature arc. */
.ambient {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}
.ambient .band {
  position: absolute;
  left: -25%;
  width: 150%;
  height: 46%;
  filter: blur(60px);
  opacity: 0.5;
  border-radius: 50%;
  mix-blend-mode: multiply;
  will-change: transform, opacity;
}
.ambient .band.b1 {
  top: 8%;
  background: radial-gradient(ellipse 50% 60% at 30% 50%, var(--aurora-1) 0%, transparent 70%),
              radial-gradient(ellipse 55% 60% at 70% 50%, var(--aurora-2) 0%, transparent 72%);
  animation: drift1 26s ease-in-out infinite alternate;
}
.ambient .band.b2 {
  top: 30%;
  background: radial-gradient(ellipse 55% 60% at 40% 50%, var(--aurora-3) 0%, transparent 70%),
              radial-gradient(ellipse 50% 55% at 75% 50%, var(--aurora-4) 0%, transparent 72%);
  animation: drift2 32s ease-in-out infinite alternate;
  opacity: 0.42;
}
.ambient .band.b3 {
  top: 52%;
  background: radial-gradient(ellipse 50% 55% at 55% 50%, var(--aurora-2) 0%, transparent 70%),
              radial-gradient(ellipse 48% 52% at 25% 50%, var(--aurora-3) 0%, transparent 72%);
  animation: drift3 38s ease-in-out infinite alternate;
  opacity: 0.34;
}
@keyframes drift1 {
  0%   { transform: translate3d(-6%, -4%, 0) scale(1.05); }
  100% { transform: translate3d(8%, 5%, 0) scale(1.18); }
}
@keyframes drift2 {
  0%   { transform: translate3d(7%, 3%, 0) scale(1.1); }
  100% { transform: translate3d(-8%, -5%, 0) scale(1.22); }
}
@keyframes drift3 {
  0%   { transform: translate3d(-5%, 5%, 0) scale(1.08); }
  100% { transform: translate3d(9%, -4%, 0) scale(1.2); }
}
/* Large ambient arc — the Bifrost bridge, breathing slowly */
.ambient-arc {
  position: absolute;
  left: 50%; top: 46%;
  width: min(120vw, 1500px);
  transform: translate(-50%, -50%);
  opacity: 0.6;
  animation: arc-breathe 14s ease-in-out infinite;
}
@keyframes arc-breathe {
  0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
  50%      { opacity: 0.7; transform: translate(-50%, -51%) scale(1.02); }
}
#slide-welcome .slide-inner { position: relative; z-index: 2; }
@media (prefers-reduced-motion: reduce) {
  .ambient .band, .ambient-arc { animation: none; }
}

/* ════════════════════ Slide 2 — Agenda ════════════════════ */
#slide-agenda .slide-inner { max-width: 900px; }
.agenda-title { margin-bottom: clamp(2rem, 5vh, 3.25rem); }
.agenda-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }
.agenda-row {
  display: grid;
  grid-template-columns: minmax(150px, 0.32fr) 1fr;
  gap: clamp(1.2rem, 3vw, 2.6rem);
  align-items: baseline;
  padding: clamp(0.85rem, 1.9vh, 1.25rem) 0;
  border-top: 1px solid rgba(56,56,49,0.12);
}
.agenda-row:last-child { border-bottom: 1px solid rgba(56,56,49,0.12); }
.agenda-time {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1rem, 1.5vw, 1.3rem);
  color: var(--ink-soft);
  white-space: nowrap;
}
.agenda-label {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: clamp(1.05rem, 1.7vw, 1.45rem);
  color: var(--ink);
  letter-spacing: -0.01em;
}
.agenda-row.is-break .agenda-label { color: var(--ink-dim); font-weight: 400; font-style: normal; }

/* ════════════════════ Slide 3 — Board / introductions ════════════════════ */
#slide-board .slide-inner { max-width: 1240px; }
.board-head { text-align: center; margin-bottom: clamp(1.8rem, 4vh, 3rem); }
.board-head .slide-title { margin-inline: auto; max-width: 20ch; }
.board-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1rem, 2vw, 2rem) clamp(1rem, 2.2vw, 2.4rem);
}
.board-member { margin: 0; text-align: center; }
.board-portrait {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--paper-3);
  box-shadow:
    0 0 0 0.5px rgba(56,56,49,0.06),
    0 14px 28px -18px rgba(56,56,49,0.22);
  margin-bottom: 0.85rem;
}
.board-portrait img { width: 100%; height: 100%; object-fit: cover; }
.bm-name {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 1.35vw, 1.22rem);
  color: var(--ink);
  margin: 0 0 0.15rem;
  letter-spacing: -0.01em;
}
.bm-title {
  font-family: var(--font-sans);
  font-size: clamp(0.74rem, 0.92vw, 0.84rem);
  color: var(--ink-soft);
  margin: 0 0 0.1rem;
  line-height: 1.35;
}
.bm-company {
  font-family: var(--font-sans);
  font-size: clamp(0.66rem, 0.82vw, 0.76rem);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  font-weight: 600;
  margin: 0;
}
@media (max-width: 900px) {
  .board-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ════════════════════ Slide 4 — Mission ════════════════════ */
#slide-mission .slide-inner { text-align: center; display: grid; justify-items: center; gap: clamp(2rem, 5vh, 3.5rem); }
.mission-values {
  font-family: var(--font-serif);
  font-weight: 360;
  font-size: clamp(1.6rem, 3.4vw, 2.8rem);
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0;
}
.mission-values b {
  font-weight: 400;
  background: linear-gradient(115deg, var(--aurora-1), var(--aurora-2), var(--aurora-3), var(--aurora-4));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Quiet partner-logo row (mission foot + sandbox) */
.partner-row {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: clamp(1.2rem, 3vw, 2.6rem);
}
.partner-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  opacity: 0.7;
}
/* Clearly-labelled placeholder for a missing authority logo */
.logo-ph {
  width: clamp(64px, 7vw, 88px);
  height: clamp(40px, 4.4vw, 52px);
  border: 1px dashed rgba(56,56,49,0.28);
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  background: rgba(255,252,247,0.5);
}
.logo-ph svg { width: 46%; height: 46%; opacity: 0.5; }
.partner-name {
  font-family: var(--font-sans);
  font-size: clamp(0.6rem, 0.78vw, 0.72rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
  font-weight: 600;
  text-align: center;
  max-width: 12ch;
  line-height: 1.3;
}
.mission-foot { margin-top: clamp(0.5rem, 2vh, 1.5rem); }
.mission-foot .partner-caption {
  font-size: clamp(0.62rem, 0.8vw, 0.72rem);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 600;
  margin: 0 0 1rem;
}

/* ════════════════════ Slide 6 — Pause ════════════════════ */
#slide-pause { }
#slide-pause .slide-inner { text-align: center; display: grid; justify-items: center; gap: clamp(1.5rem, 4vh, 2.5rem); position: relative; z-index: 2; }
.pause-word {
  font-family: var(--font-serif);
  font-weight: 330;
  font-size: clamp(3.5rem, 11vw, 9rem);
  letter-spacing: -0.03em;
  color: var(--ink);
  margin: 0;
  line-height: 1;
}
.pause-sub {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.1rem, 1.8vw, 1.5rem);
  color: var(--ink-soft);
  margin: 0;
}
.pause-clock {
  font-family: var(--font-sans);
  font-size: clamp(0.72rem, 0.95vw, 0.84rem);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-dim);
  font-weight: 600;
}

/* ════════════════════ Slide 7 — Platform architecture ════════════════════ */
#slide-arch .slide-inner { max-width: 1240px; }
.arch-head { text-align: center; margin-bottom: clamp(1.4rem, 3.2vh, 2.4rem); }
.arch-head .arch-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.7rem, 3.2vw, 2.6rem);
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
}
.arch-head .arch-sub {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  color: var(--ink-soft);
  margin: 0.35rem 0 0;
}
.arch-frame {
  position: relative;
  border: 1px solid rgba(56,56,49,0.16);
  border-radius: var(--radius-xl);
  padding: clamp(1.4rem, 2.8vw, 2.4rem) clamp(1.2rem, 2.4vw, 2rem) clamp(1.6rem, 3vw, 2.4rem);
  background: linear-gradient(180deg, rgba(255,252,247,0.6), rgba(246,242,232,0.35));
  display: grid;
  gap: clamp(1rem, 2vh, 1.6rem);
}
.arch-frame-label {
  position: absolute;
  top: 0; left: 50%;
  transform: translate(-50%, -50%);
  background: var(--paper);
  padding: 0 1rem;
  font-family: var(--font-sans);
  font-size: clamp(0.64rem, 0.82vw, 0.74rem);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-dim);
  font-weight: 600;
}
.arch-group { display: grid; gap: 0.7rem; }
.arch-group-head { display: flex; align-items: baseline; gap: 0.75rem; }
.arch-group-label {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(0.85rem, 1.1vw, 1rem);
  letter-spacing: 0.02em;
  color: var(--ink);
}
.arch-group-caption {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(0.8rem, 1vw, 0.95rem);
  color: var(--ink-soft);
}
.arch-cards { display: grid; gap: clamp(0.6rem, 1.2vw, 1rem); }
.arch-cards.c3 { grid-template-columns: repeat(3, 1fr); }
.arch-cards.c4 { grid-template-columns: repeat(4, 1fr); }
.arch-card {
  background: var(--paper-high);
  border-radius: var(--radius-md);
  padding: clamp(0.7rem, 1.3vw, 1.05rem) clamp(0.8rem, 1.4vw, 1.1rem);
  box-shadow:
    0 0 0 0.5px rgba(56,56,49,0.06),
    0 10px 22px -16px rgba(56,56,49,0.22);
  display: grid;
  gap: 0.2rem;
  align-content: start;
}
.arch-card[data-accent="foundation"] { border-top: 2px solid var(--copper); }
.arch-card[data-accent="tools"] { border-top: 2px solid var(--ochre); }
.arch-card[data-accent="agents"] { border-top: 2px solid var(--heather); }
.arch-card .ac-name {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(0.82rem, 1.05vw, 0.98rem);
  color: var(--ink);
  margin: 0;
  line-height: 1.2;
}
.arch-card .ac-italic {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(0.75rem, 0.95vw, 0.88rem);
  color: var(--ink-soft);
  margin: 0;
}
.arch-card .ac-mono {
  font-family: var(--font-sans);
  font-size: clamp(0.6rem, 0.76vw, 0.7rem);
  letter-spacing: 0.04em;
  color: var(--ink-dim);
  margin: 0.1rem 0 0;
}
@media (max-width: 860px) {
  .arch-cards.c3, .arch-cards.c4 { grid-template-columns: repeat(2, 1fr); }
}

/* ════════════════════ Slide 10 / 14 — Section dividers ════════════════════ */
.section-divider .slide-inner { text-align: center; display: grid; justify-items: center; gap: clamp(1.6rem, 4vh, 2.5rem); }
.section-divider .bifrost-logo { margin-bottom: 0.5rem; }
.section-title {
  font-family: var(--font-serif);
  font-weight: 360;
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin: 0;
  max-width: 16ch;
  text-wrap: balance;
}
.section-title em { font-style: italic; font-weight: 460; color: var(--terracotta); }

/* Reserved-points layout (slide 14) */
.approach-points {
  list-style: none;
  margin: clamp(1.5rem, 4vh, 2.5rem) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(0.7rem, 1.6vh, 1.1rem);
  width: min(640px, 100%);
  text-align: left;
}
.approach-points li {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: clamp(0.85rem, 1.8vh, 1.15rem) clamp(1.1rem, 2vw, 1.5rem);
  border: 1px dashed rgba(56,56,49,0.2);
  border-radius: var(--radius-md);
  color: var(--ink-dim);
  background: rgba(255,252,247,0.35);
}
.approach-points li::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--aurora-2), var(--aurora-4));
  flex: 0 0 auto;
}
.approach-points .ph-text {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(0.95rem, 1.3vw, 1.1rem);
}

/* ════════════════════ Slide 11 — Highlight boxes ════════════════════ */
#slide-highlights .slide-inner { max-width: 1140px; }
.highlights-head { text-align: center; margin-bottom: clamp(1.6rem, 4vh, 2.6rem); }
.highlight-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(0.9rem, 1.8vw, 1.5rem);
}
.highlight-box {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--paper-high);
  box-shadow:
    0 0 0 0.5px rgba(56,56,49,0.06),
    0 18px 36px -22px rgba(56,56,49,0.28);
  display: flex;
  flex-direction: column;
  min-height: clamp(300px, 44vh, 420px);
}
.highlight-art {
  height: 42%;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}
.highlight-art svg { width: 56%; height: 56%; }
.highlight-box[data-tone="terracotta"] .highlight-art { background: linear-gradient(150deg, #c98a78, #a4553b); }
.highlight-box[data-tone="indigo"] .highlight-art { background: linear-gradient(150deg, #7b91a6, #5a6d83); }
.highlight-box[data-tone="heather"] .highlight-art { background: linear-gradient(150deg, #a594a0, #6e5a86); }
.highlight-box[data-tone="ochre"] .highlight-art { background: linear-gradient(150deg, #d4b478, #b08a3e); }
.highlight-art svg { stroke: rgba(255,252,247,0.92); }
.highlight-body {
  padding: clamp(1rem, 1.8vw, 1.4rem);
  display: grid;
  gap: 0.5rem;
  align-content: start;
  flex: 1;
}
.highlight-num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--ink-dim);
}
.highlight-name {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.15rem, 1.7vw, 1.45rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0;
}
.highlight-note {
  font-family: var(--font-sans);
  font-size: clamp(0.78rem, 0.98vw, 0.9rem);
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.45;
}
@media (max-width: 980px) {
  .highlight-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ════════════════════ Slide 12 — Meme ════════════════════ */
#slide-meme .slide-inner { display: grid; justify-items: center; gap: clamp(1.4rem, 3.5vh, 2.2rem); text-align: center; }
.meme-frame {
  padding: clamp(0.6rem, 1.4vw, 1rem);
  background: var(--paper-high);
  border-radius: var(--radius-lg);
  box-shadow:
    0 0 0 0.5px rgba(56,56,49,0.07),
    0 30px 60px -28px rgba(56,56,49,0.34),
    0 6px 16px -8px rgba(56,56,49,0.16);
  max-width: min(640px, 78vw);
}
.meme-frame img {
  border-radius: calc(var(--radius-lg) - 6px);
  max-height: 62vh;
  width: auto;
}
.meme-caption {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  color: var(--ink-soft);
  margin: 0;
}

/* ════════════════════ Slide 15 — Regulatory sandbox ════════════════════ */
#slide-sandbox .slide-inner { text-align: center; display: grid; justify-items: center; gap: clamp(1.6rem, 4vh, 2.6rem); max-width: 920px; }
.sandbox-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-sans);
  font-size: clamp(0.7rem, 0.92vw, 0.82rem);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--copper);
  padding: 0.5rem 1.1rem;
  border: 1px solid rgba(109,140,124,0.4);
  border-radius: var(--radius-full);
}
.sandbox-title {
  font-family: var(--font-serif);
  font-weight: 360;
  font-size: clamp(2rem, 4.4vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -0.022em;
  color: var(--ink);
  margin: 0;
  max-width: 20ch;
  text-wrap: balance;
}
.sandbox-title em { font-style: italic; font-weight: 460; color: var(--terracotta); }
.sandbox-sub {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.1rem, 1.8vw, 1.5rem);
  color: var(--ink-soft);
  margin: 0;
  max-width: 34ch;
}

/* ════════════════════ Slide 17 — Closing ════════════════════ */
#slide-thanks .slide-inner { text-align: center; display: grid; justify-items: center; gap: clamp(2rem, 5vh, 3.5rem); position: relative; z-index: 2; }
.thanks-title {
  font-family: var(--font-serif);
  font-weight: 340;
  font-size: clamp(2.6rem, 6.5vw, 5.5rem);
  letter-spacing: -0.03em;
  color: var(--ink);
  margin: 0;
  line-height: 1;
}
.thanks-title em { font-style: italic; font-weight: 440; }

/* Small responsive guard for very short viewports */
@media (max-height: 640px) {
  .slide { padding-top: clamp(3rem, 6vh, 4rem); padding-bottom: clamp(3.5rem, 7vh, 5rem); }
}