/* ============================================================
   Flatbush Junction BID — Working Session
   Design system extends the report "Information as Infrastructure"
   Palette, type and rules carried over so the deck reads as the
   same body of work. Self-contained (no CDN) — editorial serif
   stack with Source Serif 4 / Libre Franklin used if installed.
   ============================================================ */

:root {
  /* Paper + ink (from the report) */
  --paper: #faf8f2;
  --paper-2: #f4f0e7;
  --paper-3: #efeae0;
  --ink: #121212;
  --muted: #3f3b36;
  --faint: #6a655d;
  --faintest: #948f86;

  /* Hairlines */
  --line: #12121221;
  --line-2: #1212123a;
  --line-strong: #12121257;

  /* Accents (from the report) */
  --sea: #2b8499;       /* teal — structure, "what good looks like" */
  --sea-deep: #1d6678;
  --sea-wash: #2b849914;
  --coral: #b65243;     /* coral — tension, the gap, attention */
  --coral-deep: #9a4032;
  --coral-wash: #b6524314;
  --coral-line: #b6524352;

  /* Semantic deltas (from the report) */
  --up: #11725f;
  --down: #9a4639;
  --steady: #12121280;

  /* Type */
  --serif: "Source Serif 4", "Iowan Old Style", "Palatino Linotype",
    Palatino, Georgia, "Times New Roman", serif;
  --sans: "Libre Franklin", system-ui, -apple-system, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;

  /* Rhythm */
  --pad-x: clamp(1.5rem, 5vw, 6rem);
  --pad-y: clamp(1.5rem, 4vh, 3.5rem);
  --measure: 46rem;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-family: var(--serif);
}

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

html,
body {
  margin: 0;
  height: 100%;
  background: var(--paper);
  color: var(--ink);
}

body {
  min-width: 320px;
  overflow: hidden; /* deck owns the viewport */
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
li,
figure {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

::selection {
  background: var(--coral-line);
  color: var(--ink);
}

/* ---------- Atmosphere overlays ---------- */
.grain {
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  opacity: 0.5;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.045'/%3E%3C/svg%3E");
}

.vignette {
  position: fixed;
  inset: 0;
  z-index: 59;
  pointer-events: none;
  background: radial-gradient(
    120% 100% at 50% 38%,
    transparent 55%,
    rgba(18, 18, 18, 0.05) 100%
  );
}

/* ============================================================
   Deck + slide framework
   ============================================================ */
#deck {
  position: fixed;
  inset: 0;
  z-index: 1;
}

.slide {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  padding: calc(var(--pad-y) + 0.5rem) var(--pad-x) calc(var(--pad-y) + 3rem);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.6s var(--ease),
    visibility 0s linear 0.6s;
  overflow: hidden;
}

.slide.is-active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 0.55s var(--ease) 0.05s,
    transform 0.7s var(--ease-out) 0.05s, visibility 0s;
}

/* Direction-aware: previous slides exit upward, future downward */
.slide.is-past {
  transform: translateY(-14px);
}

.slide__body {
  display: flex;
  flex-direction: column;
  /* center when it fits, fall back to top-aligned scroll when it doesn't —
     "safe" prevents the content from ever being clipped at the top edge */
  justify-content: safe center;
  width: 100%;
  min-height: 0;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--line-2) transparent;
}
.slide__body::-webkit-scrollbar {
  width: 6px;
}
.slide__body::-webkit-scrollbar-thumb {
  background: var(--line-2);
  border-radius: 3px;
}
.slide__inner {
  width: 100%;
  max-width: 84rem;
  margin-inline: auto;
  padding: 0.4rem 0;
}

.slide__top,
.slide__foot {
  width: 100%;
  max-width: 84rem;
  margin: 0 auto;
}

/* Slide header band: section kicker + slide index */
.slide__top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.7rem;
}

.slide__kicker {
  font-family: var(--sans);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.slide__kicker .dot {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--sea);
  display: inline-block;
}
.slide[data-accent="coral"] .slide__kicker .dot {
  background: var(--coral);
}

.slide__index {
  font-family: var(--sans);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--faintest);
}
.slide__index b {
  color: var(--ink);
  font-weight: 700;
}

/* Foot band: report wordmark */
.slide__foot {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-top: 1px solid var(--line);
  padding-top: 0.7rem;
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faintest);
}

/* ============================================================
   Reveal system — staged content within a slide
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s var(--ease), transform 0.55s var(--ease-out);
}
.slide.is-active .reveal.is-shown {
  opacity: 1;
  transform: translateY(0);
}
/* When a slide first activates, staged items cascade in */
.slide.is-active .reveal.is-shown.cascade {
  transition-delay: calc(var(--i, 0) * 90ms);
}

/* ============================================================
   Navigation chrome
   ============================================================ */
#chrome {
  position: fixed;
  inset: 0;
  z-index: 40;
  pointer-events: none;
}

/* Click zones for prev / next */
.navzone {
  position: absolute;
  top: 0;
  bottom: 5.5rem;
  width: 18%;
  pointer-events: auto;
  cursor: pointer;
  opacity: 0;
}
.navzone--prev {
  left: 0;
  cursor: w-resize;
}
.navzone--next {
  right: 0;
  cursor: e-resize;
}

/* Bottom progress rail */
.rail {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5.5rem;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 0 var(--pad-x) 1.05rem;
}

.rail__sections {
  pointer-events: auto;
  display: flex;
  gap: 0.5rem;
  max-width: 84rem;
  width: 100%;
  margin: 0 auto 0.7rem;
}

.rail__seg {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  gap: 0.32rem;
  cursor: pointer;
  background: none;
  text-align: left;
  padding: 0;
}

.rail__seg .bar {
  height: 2px;
  width: 100%;
  background: var(--line-2);
  position: relative;
  overflow: hidden;
}
.rail__seg .bar::after {
  content: "";
  position: absolute;
  inset: 0;
  width: var(--fill, 0%);
  background: var(--ink);
  transition: width 0.4s var(--ease);
}
.rail__seg[data-accent="coral"] .bar::after {
  background: var(--coral);
}
.rail__seg[data-accent="sea"] .bar::after {
  background: var(--sea);
}

.rail__seg .lbl {
  font-family: var(--sans);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faintest);
  transition: color 0.25s var(--ease);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.rail__seg.is-current .lbl,
.rail__seg:hover .lbl {
  color: var(--ink);
}

.rail__meta {
  pointer-events: auto;
  max-width: 84rem;
  width: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
}

.rail__hint {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}
.rail__hint kbd {
  font-family: var(--sans);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: 1px solid var(--line-2);
  border-radius: 3px;
  padding: 0.08rem 0.34rem;
  color: var(--faint);
  background: var(--paper-2);
}
.rail__controls {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}
.rail__btn {
  pointer-events: auto;
  width: 1.9rem;
  height: 1.9rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-2);
  border-radius: 50%;
  color: var(--muted);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease),
    background 0.2s var(--ease);
}
.rail__btn:hover {
  border-color: var(--line-strong);
  color: var(--ink);
  background: var(--paper-2);
}
.rail__btn svg {
  width: 0.85rem;
  height: 0.85rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ============================================================
   Slide overview / jump grid
   ============================================================ */
.overview {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(244, 240, 231, 0.86);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: clamp(1.5rem, 5vh, 3rem) var(--pad-x);
  overflow-y: auto;
  animation: fade 0.3s var(--ease);
}
.overview[hidden] {
  display: none;
}
@keyframes fade {
  from {
    opacity: 0;
  }
}
.overview__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--line-2);
  padding-bottom: 0.9rem;
  margin-bottom: 1.6rem;
  max-width: 84rem;
  margin-inline: auto;
}
.overview__title {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
}
.overview__close {
  font-family: var(--sans);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
}
.overview__close:hover {
  color: var(--coral);
}
.overview__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 0.9rem;
  max-width: 84rem;
  margin: 0 auto;
}
.ovcard {
  text-align: left;
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 0.85rem 0.95rem 0.95rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-height: 6.2rem;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}
.ovcard:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px -18px rgba(18, 18, 18, 0.5);
}
.ovcard.is-current {
  border-color: var(--coral);
  box-shadow: inset 0 0 0 1px var(--coral-line);
}
.ovcard__n {
  font-family: var(--sans);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--faintest);
}
.ovcard__sec {
  font-family: var(--sans);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sea);
}
.ovcard[data-accent="coral"] .ovcard__sec {
  color: var(--coral);
}
.ovcard__t {
  font-family: var(--serif);
  font-size: 0.98rem;
  line-height: 1.2;
  color: var(--ink);
  margin-top: auto;
}

/* ============================================================
   Typography primitives reused across slide types
   ============================================================ */
.eyebrow {
  font-family: var(--sans);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}

.headline {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 0.98;
}

.deck-text {
  font-family: var(--serif);
  color: var(--muted);
  line-height: 1.6;
}

.accent-sea {
  color: var(--sea-deep);
}
.accent-coral {
  color: var(--coral-deep);
}

/* Loading state before JS renders */
.deck-loading {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faintest);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .slide {
    grid-template-rows: auto 1fr auto;
  }
  .rail__hint {
    display: none;
  }
}

@media (max-width: 680px) {
  .rail__sections {
    display: none;
  }
  .rail {
    height: 4rem;
  }
  .slide {
    padding-bottom: calc(var(--pad-y) + 2.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .slide,
  .slide.is-active,
  .reveal,
  .ovcard {
    transition-duration: 0.001s !important;
  }
}