/* =============================================
   Deck — Slide Layout & Variant Styles
   ============================================= */

/* ===================== RESET ===================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: var(--font);
  color: var(--charcoal);
  background: var(--snow);
  -webkit-font-smoothing: antialiased;
}

/* ===================== SITE HEADER ===================== */
.deck-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-xs) var(--sp-sm);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rock);
  z-index: 110;
  font-size: 0.85rem;
}

.deck-header__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  font-size: 0.95rem;
}

.deck-header__brand img {
  border-radius: 6px;
}

.deck-header__brand em {
  font-style: normal;
  font-weight: 500;
}

.deck-header__links {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
}

.deck-header__links a {
  text-decoration: none;
  color: var(--charcoal);
  font-weight: 500;
  font-size: 0.85rem;
  transition: color 0.2s;
}

.deck-header__links a:hover,
.deck-header__links a[aria-current="page"] {
  color: var(--purple);
}

.deck-header__links a:focus-visible {
  outline: 2px solid var(--purple);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===================== DECK SHELL ===================== */
.deck {
  position: relative;
  width: 100%;
  height: 100dvh;
  overflow: hidden;
  padding-top: 44px; /* space for site header */
}

/* ===================== PROGRESS BAR ===================== */
.deck-progress {
  position: fixed;
  top: 44px; /* below site header */
  left: 0;
  height: var(--progress-h);
  background: var(--purple);
  transition: width var(--slide-transition);
  z-index: 100;
}

/* ===================== NAV STRIP ===================== */
.deck-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-sm);
  padding: var(--sp-xs) var(--sp-sm);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--rock);
  z-index: 100;
  font-size: 0.85rem;
  color: var(--ink);
  transition: transform var(--slide-transition);
}

.deck-nav.hidden { transform: translateY(100%); }

/* -- Circular icon buttons ---- */
.deck-nav__btn {
  all: unset;
  cursor: pointer;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--chalk);
  transition: background 0.2s, transform 0.2s;
}

.deck-nav__btn svg {
  width: 18px;
  height: 18px;
  stroke: var(--ink);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.deck-nav__btn:hover { background: var(--rock); transform: scale(1.08); }
.deck-nav__btn:disabled { opacity: 0.25; cursor: default; transform: none; }
.deck-nav__btn:disabled:hover { background: var(--chalk); }

/* Focus-visible for keyboard nav */
.deck-nav__btn:focus-visible,
.deck-nav__mosaic:focus-visible {
  outline: 2px solid var(--purple);
  outline-offset: 2px;
}

/* -- Section progress dots ---- */
.deck-nav__sections {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 var(--sp-xs);
}

.deck-nav__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--rock);
  transition: background 0.4s ease, transform 0.4s ease;
}

.deck-nav__dot.active {
  background: var(--purple);
  transform: scale(1.35);
}

.deck-nav__dot.visited {
  background: var(--purple-20);
}

/* -- Counter (smaller, secondary) ---- */
.deck-nav__counter {
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
  color: var(--rock);
  min-width: 44px;
  text-align: center;
}

.deck-nav__mosaic {
  all: unset;
  cursor: pointer;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--chalk);
  transition: background 0.2s, transform 0.2s;
}

.deck-nav__mosaic:hover { background: var(--rock); transform: scale(1.08); }
.deck-nav__mosaic svg { width: 16px; height: 16px; stroke: var(--ink); fill: none; stroke-width: 2; }

/* ===================== SLIDE TRACK ===================== */
.slide-track {
  display: flex;
  height: 100%;
  transition: transform var(--slide-transition);
}

.slide-track.no-transition { transition: none; }

/* ===================== SLIDE ===================== */
.slide {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--slide-pad);
  overflow-y: auto;
}

.slide-inner {
  max-width: var(--slide-max-w);
  width: 100%;
}

/* ===================== STAGGERED CONTENT REVEAL ===================== */
@keyframes revealUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes revealFade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes revealScale {
  from { opacity: 0; transform: scale(0.95); }
  to   { opacity: 1; transform: scale(1); }
}

/* Children start invisible, animate when slide is active */
.slide:not(.mosaic *) .slide-inner > * {
  opacity: 0;
}

.slide.active .slide-inner > * {
  animation: revealUp 0.7s cubic-bezier(.16, 1, .3, 1) both;
}

.slide.active .slide-inner > *:nth-child(1) { animation-delay: 0.1s; }
.slide.active .slide-inner > *:nth-child(2) { animation-delay: 0.24s; }
.slide.active .slide-inner > *:nth-child(3) { animation-delay: 0.38s; }
.slide.active .slide-inner > *:nth-child(4) { animation-delay: 0.50s; }
.slide.active .slide-inner > *:nth-child(5) { animation-delay: 0.62s; }
.slide.active .slide-inner > *:nth-child(6) { animation-delay: 0.72s; }

/* Stat rows get extra stagger */
.slide.active .stat-row {
  animation: revealScale 0.7s cubic-bezier(.16, 1, .3, 1) both;
}

/* Act break slides: scale-in */
.slide--act-break.active .slide-inner > * {
  animation-name: revealScale;
}

/* ===================== REDUCED MOTION ===================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0ms !important;
    transition-duration: 0.01ms !important;
  }

  .slide:not(.mosaic *) .slide-inner > * {
    opacity: 1;
  }
}

/* ===================== SECTION TRANSITION VARIETY ===================== */

/* Fade transition: slides cross-fade instead of horizontal slide */
.deck--fade .slide-track {
  transition: none;
}

.deck--fade .slide {
  position: absolute;
  inset: 0;
  padding-top: calc(var(--slide-pad) + 44px); /* account for header */
  opacity: 0;
  transition: opacity 0.7s cubic-bezier(.4, 0, .2, 1);
  pointer-events: none;
}

.deck--fade .slide.active {
  opacity: 1;
  pointer-events: auto;
  position: relative;
  padding-top: var(--slide-pad);
}

/* Scale transition: current slide scales up from 97% */
.deck--scale .slide-track {
  transition: none;
}

.deck--scale .slide {
  position: absolute;
  inset: 0;
  padding-top: calc(var(--slide-pad) + 44px);
  opacity: 0;
  transform: scale(0.97);
  transition: opacity 0.65s cubic-bezier(.4, 0, .2, 1), transform 0.65s cubic-bezier(.4, 0, .2, 1);
  pointer-events: none;
}

.deck--scale .slide.active {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
  position: relative;
  padding-top: var(--slide-pad);
}

/* ===================== SLIDE VARIANTS ===================== */

/* -- Statement (key message slides) ----------------------- */
.slide--statement {
  text-align: center;
}

.slide--statement .slide-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-md);
}

.slide--statement h2 {
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  font-weight: 800;
  font-style: italic;
  line-height: 1.2;
  max-width: 18em;
}

.slide--statement p {
  font-size: clamp(1rem, 2.2vw, 1.35rem);
  line-height: 1.6;
  max-width: 32em;
}

.slide--statement .subtext {
  font-size: 0.95rem;
  opacity: 0.6;
}

/* Statement colour variants */
.slide--statement.slide--ink {
  background: var(--ink);
  color: var(--snow);
}

.slide--statement.slide--snow {
  background: var(--snow);
  color: var(--ink);
}

.slide--statement.slide--chalk {
  background: var(--chalk);
  color: var(--ink);
}

/* -- Act break -------------------------------------------- */
.slide--act-break {
  background: var(--purple);
  color: var(--snow);
  text-align: center;
}

.slide--act-break .slide-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-sm);
}

.slide--act-break .act-label {
  font-family: var(--font-accent);
  font-size: 1.4rem;
  opacity: 0.65;
}

.slide--act-break h2 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
}

/* -- List ------------------------------------------------- */
.slide--list h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  font-style: italic;
  color: var(--ink);
  margin-bottom: var(--sp-md);
}

.slide--list ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}

.slide--list li {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--charcoal);
}

/* -- Bio / CTA closing ------------------------------------ */
.slide--bio {
  background: var(--ink);
  color: var(--snow);
  text-align: center;
}

.slide--bio .slide-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-md);
}

.slide--bio .bio-product {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
}

.slide--bio .bio-tagline {
  font-size: clamp(1rem, 2.2vw, 1.3rem);
  opacity: 0.8;
  max-width: 28em;
}

.slide--bio .bio-actions {
  display: flex;
  gap: var(--sp-sm);
  flex-wrap: wrap;
  justify-content: center;
}

.slide--bio .btn-primary {
  display: inline-block;
  padding: 14px 32px;
  background: var(--pink);
  color: var(--ink);
  font-weight: 700;
  border-radius: 999px;
  text-decoration: none;
  font-size: 1.1rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.slide--bio .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

.slide--bio .btn-primary:focus-visible {
  outline: 2px solid var(--snow);
  outline-offset: 2px;
}

.slide--bio .btn-secondary {
  display: inline-block;
  padding: 14px 32px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: var(--snow);
  font-weight: 600;
  border-radius: 999px;
  text-decoration: none;
  font-size: 1.1rem;
  transition: border-color 0.2s;
}

.slide--bio .btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.6);
}

.slide--bio .btn-secondary:focus-visible {
  outline: 2px solid var(--snow);
  outline-offset: 2px;
}

.slide--bio .meta {
  font-size: 0.85rem;
  opacity: 0.4;
}

/* -- Cover ------------------------------------------------ */
.slide--cover {
  background: var(--ink);
  color: var(--snow);
  text-align: center;
}

.slide--cover .slide-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-md);
}

.slide--cover h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
}

.slide--cover .subtitle {
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  opacity: 0.75;
  font-weight: 400;
}

.slide--cover .meta {
  font-size: 0.9rem;
  opacity: 0.5;
  margin-top: var(--sp-sm);
}

/* -- Section divider -------------------------------------- */
.slide--section {
  background: var(--purple);
  color: var(--snow);
  text-align: center;
}

.slide--section h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
}

.slide--section .section-num {
  font-family: var(--font-accent);
  font-size: 1.4rem;
  opacity: 0.6;
  margin-bottom: var(--sp-xs);
}

/* -- Default (body text) ---------------------------------- */
.slide--body h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--ink);
  margin-bottom: var(--sp-md);
}

.slide--body p,
.slide--body li {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--charcoal);
}

.slide--body ul,
.slide--body ol {
  padding-left: 1.4em;
  display: flex;
  flex-direction: column;
  gap: var(--sp-xs);
}

.slide--body blockquote {
  border-left: 4px solid var(--purple);
  padding: var(--sp-sm) var(--sp-md);
  background: var(--violet-tint);
  border-radius: 0 var(--slide-radius) var(--slide-radius) 0;
  font-size: 1.15rem;
  font-style: italic;
  color: var(--ink);
}

/* -- Stat / big number ------------------------------------ */
.slide--stat {
  text-align: center;
  background: var(--chalk);
}

.slide--stat .slide-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-lg);
}

.stat-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-xs);
}

.slide--stat .big-num {
  display: block;
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 900;
  color: var(--purple);
  line-height: 1;
}

.slide--stat .stat-label {
  display: block;
  font-size: clamp(0.95rem, 2vw, 1.25rem);
  color: var(--charcoal);
  max-width: 20em;
}

.slide--stat .stat-source {
  font-size: 0.85rem;
  margin-top: var(--sp-sm);
  opacity: 0.5;
}

/* -- Two-column ------------------------------------------- */
.slide--split .slide-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-lg);
  align-items: center;
}

.slide--split h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--ink);
  margin-bottom: var(--sp-sm);
}

.slide--split p,
.slide--split li {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--charcoal);
}

.slide--split ul {
  padding-left: 1.4em;
  display: flex;
  flex-direction: column;
  gap: var(--sp-xs);
}

.slide--split .split-label {
  font-family: var(--font-accent);
  font-size: 1rem;
  color: var(--purple);
  margin-bottom: var(--sp-xs);
}

.slide--split blockquote {
  border-left: 4px solid var(--purple);
  padding: var(--sp-sm) var(--sp-md);
  background: var(--violet-tint);
  border-radius: 0 var(--slide-radius) var(--slide-radius) 0;
  font-size: 1rem;
  font-style: italic;
  color: var(--ink);
  margin-top: var(--sp-sm);
}

/* -- Image full-bleed ------------------------------------- */
.slide--image {
  padding: 0;
}

.slide--image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* -- Quote ------------------------------------------------ */
.slide--quote {
  background: var(--pink-tint);
  text-align: center;
}

.slide--quote blockquote {
  font-family: var(--font-accent);
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  line-height: 1.4;
  color: var(--ink);
  border: none;
  background: none;
  padding: 0;
}

.slide--quote cite {
  display: block;
  margin-top: var(--sp-md);
  font-family: var(--font);
  font-size: 0.95rem;
  font-style: normal;
  opacity: 0.6;
}

/* -- CTA / closing ---------------------------------------- */
.slide--cta {
  background: var(--ink);
  color: var(--snow);
  text-align: center;
}

.slide--cta h2 {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 800;
  margin-bottom: var(--sp-md);
}

.slide--cta .cta-link {
  display: inline-block;
  padding: 14px 32px;
  background: var(--pink);
  color: var(--ink);
  font-weight: 700;
  border-radius: 999px;
  text-decoration: none;
  font-size: 1.1rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.slide--cta .cta-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* ===================== MOSAIC MODE ===================== */
/* Override fade/scale positioning so grid works */
.deck.mosaic .slide-track {
  display: grid;
  grid-template-columns: repeat(var(--mosaic-cols), 1fr);
  gap: var(--mosaic-gap);
  padding: var(--sp-lg) var(--sp-sm);
  height: auto;
  overflow-y: auto;
  transition: none;
  transform: none !important;
}

.deck.mosaic .slide {
  position: static !important;
  opacity: 1 !important;
  transform: none !important;
  pointer-events: auto !important;
  height: 220px;
  border-radius: var(--slide-radius);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: transform 0.2s, box-shadow 0.2s;
  overflow: hidden;
  padding: 0;
}

.deck.mosaic .slide:hover {
  transform: translateY(-4px) !important;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.deck.mosaic .slide .slide-inner {
  transform: scale(0.45);
  transform-origin: top left;
  width: 222%;
  pointer-events: none;
}

.deck.mosaic .deck-progress { display: none; }
.deck.mosaic .deck-nav__counter { display: none; }

/* Disable reveal animations in mosaic */
.deck.mosaic .slide .slide-inner > * {
  opacity: 1 !important;
  animation: none !important;
}

/* ===================== KEYBOARD HINT ===================== */
.deck-keys {
  position: fixed;
  bottom: 60px;
  right: var(--sp-sm);
  font-size: 0.75rem;
  color: var(--rock);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.deck:hover .deck-keys { opacity: 1; }

/* ===================== RESPONSIVE ===================== */
@media (max-width: 768px) {
  :root {
    --slide-pad: var(--sp-md);
    --mosaic-cols: 2;
  }

  .slide--split .slide-inner {
    grid-template-columns: 1fr;
    gap: var(--sp-md);
  }

  .deck-nav__btn { width: 36px; height: 36px; }
  .deck-nav__mosaic { width: 36px; height: 36px; }

  .deck-header__links { gap: var(--sp-sm); }
  .deck-header__links a { font-size: 0.8rem; }
}

@media (max-width: 480px) {
  :root {
    --mosaic-cols: 1;
  }
}

/* ===================== PRINT ===================== */
@media print {
  .deck-progress,
  .deck-nav,
  .deck-keys,
  .deck-header { display: none; }

  .deck { padding-top: 0; }

  .slide-track {
    display: block;
    transform: none !important;
  }

  .slide {
    page-break-after: always;
    height: auto;
    min-height: 100vh;
    position: static !important;
    opacity: 1 !important;
  }

  .slide .slide-inner > * {
    opacity: 1 !important;
    animation: none !important;
  }
}