/* =========================================================================
   Shared mechanics for the direction decks (stage, slides, steps, overview,
   controls). Each direction sets its own tokens and layouts on top.
   Stage is 1920 × 1080.
   ========================================================================= */

:root {
  /* Brand palette (Bixler's UI guide) */
  --c-white: #fffffd;
  --c-paper: #f9f8f0;
  --c-ink: #0f1b18;
  --c-green: #23533c;
  --c-sage: #d0d3c7;

  --serif: "EB Garamond", Garamond, "Times New Roman", serif;
  --sans: "Avenir Next", Avenir, "Nunito Sans", system-ui, sans-serif;
  --mono: "Courier Prime", "Courier New", monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-io: cubic-bezier(0.65, 0, 0.35, 1);
  --safe-x: 128px;
  --safe-y: 96px;

  /* Defaults, overridden by each direction */
  --frame: #0f1b18;
  --bg: var(--c-white);
  --fg: var(--c-ink);
  --muted: rgba(15, 27, 24, 0.58);
  --rule: rgba(15, 27, 24, 0.14);
  --accent: var(--c-green);
  --line: var(--c-green);
  --line-soft: rgba(35, 83, 60, 0.3);
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--frame);
}
body {
  font-family: var(--sans);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  user-select: none;
  -webkit-user-select: none;
}
body.idle,
body.idle * {
  cursor: none !important;
}
img {
  display: block;
}

.stage {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 1920px;
  height: 1080px;
  margin: -540px 0 0 -960px;
  transform: scale(var(--scale, 1));
  overflow: hidden;
  background: var(--bg);
}

.slide {
  position: absolute;
  inset: 0;
  visibility: hidden;
  overflow: hidden;
  background: var(--bg);
  color: var(--fg);
}
.slide.is-active,
.slide.is-leaving {
  visibility: visible;
}
.slide.is-leaving {
  z-index: 1;
}
.slide.is-active {
  z-index: 2;
}
.slide .notes {
  display: none;
}

/* Entry animation */
.slide .in {
  opacity: 0;
}
.slide.is-active .in {
  animation: rise 1.3s var(--ease) both;
  animation-delay: calc(var(--d, 0) * 1ms + 450ms);
}
.slide.is-active .in.fade {
  animation-name: fadein;
  animation-duration: 1.8s;
}
.slide.is-leaving .in {
  opacity: 1;
  animation: none;
}
@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
@keyframes fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Word-by-word reveal behind a mask (titles marked data-split) */
.split .w {
  display: inline-block;
  overflow: hidden;
  vertical-align: top;
  padding: 0 0.02em 0.12em;
  margin: 0 -0.02em -0.12em;
}
.split .w > span {
  display: inline-block;
  transform: translateY(110%);
}
.slide.is-active .split .w > span {
  animation: wordup 1.15s var(--ease) both;
  animation-delay: calc(var(--d, 0) * 1ms + var(--i, 0) * 55ms + 420ms);
}
.slide.is-leaving .split .w > span {
  transform: none;
  animation: none;
}
@keyframes wordup {
  from {
    transform: translateY(110%);
  }
  to {
    transform: none;
  }
}

/* Steps: [data-step] from step n, [data-only] at step n only, [data-focus] highlight at step n */
.slide [data-step],
.slide [data-only] {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.9s var(--ease),
    transform 1.2s var(--ease);
}
.slide [data-step].on,
.slide [data-only].on {
  opacity: 1;
  transform: none;
}
.slide .fade[data-step],
.slide .fade[data-only] {
  transform: none;
}
.slide .dim[data-step] {
  opacity: 0.22;
  transform: none;
}
.slide .dim[data-step].on {
  opacity: 1;
}

/* Line drawings draw themselves */
.slide .d {
  stroke-dasharray: 1 0;
}
.slide.is-active .draw-in:not([data-step]) .d,
.slide.is-active .draw-in.on .d {
  animation: draw 2.6s var(--ease) both;
  animation-delay: calc(var(--dd, 0) * 1ms + 300ms);
}
.slide.is-leaving .d {
  animation: none;
}
@keyframes draw {
  from {
    stroke-dasharray: 0 1;
  }
  to {
    stroke-dasharray: 1 0;
  }
}

.art svg {
  width: 100%;
  height: 100%;
  display: block;
  overflow: visible;
}
.art {
  color: var(--line);
}
.art .s {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.art .t {
  fill: none;
  stroke: var(--line-soft);
  stroke-width: 1.2;
}
.art .f {
  fill: currentColor;
  stroke: none;
}
.art .hand-s {
  stroke: var(--accent);
  stroke-width: 1.5;
  stroke-linecap: round;
}
.art .sign-t {
  fill: currentColor;
  stroke: none;
  font: 400 28px var(--serif);
  letter-spacing: 9px;
}
.art .lbl-s {
  fill: var(--muted);
  font: 600 13px var(--sans);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.art .win,
.art .shop {
  fill: transparent;
}

/* Photos: cover their box */
.photo {
  position: absolute;
  overflow: hidden;
}
.photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.slide.is-active .kb img {
  animation: kenburns 16s linear both;
}
@keyframes kenburns {
  from {
    transform: scale(1.001);
  }
  to {
    transform: scale(1.07);
  }
}

/* Source note on borrowed images */
.credit {
  position: absolute;
  font: 600 11px/1.4 var(--sans);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  z-index: 6;
}

/* Overview */
.stage.overview .slide {
  visibility: visible;
  cursor: pointer;
  transform-origin: 0 0;
  box-shadow: 0 0 0 2px var(--rule);
  transition:
    transform 0.7s var(--ease),
    box-shadow 0.3s;
}
.stage.overview .slide.sel {
  box-shadow: 0 0 0 12px var(--accent);
}
.stage.overview .slide::before {
  content: attr(data-label);
  position: absolute;
  left: 0;
  top: 0;
  z-index: 60;
  padding: 26px 44px;
  background: var(--bg);
  color: var(--fg);
  font: 600 64px/1 var(--sans);
  letter-spacing: 0.08em;
}
.stage.overview .in,
.stage.overview [data-step],
.stage.overview [data-only] {
  opacity: 1 !important;
  transform: none !important;
  animation: none !important;
}
.stage.overview [data-only]:not(.on) {
  opacity: 0 !important;
}
.stage.overview .split .w > span,
.stage.overview .d,
.stage.overview .kb img {
  transform: none !important;
  animation: none !important;
}

/* Controls (outside the stage) */
.hud {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  font: 600 11px/1 var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #f9f8f0;
  background: linear-gradient(to top, rgba(15, 27, 24, 0.82) 30%, transparent);
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity 0.4s var(--ease),
    transform 0.4s var(--ease);
  pointer-events: none;
}
body.show-hud .hud {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.hud-l,
.hud-r {
  display: flex;
  align-items: center;
  gap: 14px;
}
.hud-count {
  font-variant-numeric: tabular-nums;
}
.hud-title {
  color: rgba(249, 248, 240, 0.6);
}
.hud-tag {
  padding: 0 10px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  border: 1px dashed rgba(249, 248, 240, 0.5);
}
.hud button,
.hud a {
  appearance: none;
  border: 0;
  background: transparent;
  color: inherit;
  text-decoration: none;
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  height: 32px;
  padding: 0 12px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
}
.hud a {
  border: 1px solid rgba(249, 248, 240, 0.3);
}
.hud .icon {
  width: 36px;
  padding: 0;
  justify-content: center;
}
.hud .icon:hover,
.hud a:hover {
  background: rgba(249, 248, 240, 0.12);
}
.hud svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.hud button:focus-visible,
.hud a:focus-visible {
  outline: 2px solid #d0d3c7;
  outline-offset: 2px;
}
.progress {
  position: fixed;
  left: 0;
  bottom: 0;
  z-index: 101;
  height: 2px;
  width: calc(var(--p, 0) * 100%);
  background: #d0d3c7;
  opacity: 0;
  transition:
    width 0.8s var(--ease),
    opacity 0.4s;
}
body.show-hud .progress {
  opacity: 0.8;
}
.help {
  position: fixed;
  right: 20px;
  bottom: 64px;
  z-index: 102;
  width: 340px;
  padding: 22px 24px;
  background: #f9f8f0;
  color: #0f1b18;
  box-shadow: 0 20px 60px rgba(8, 15, 13, 0.35);
  font: 400 14px/1.5 var(--sans);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition:
    opacity 0.3s,
    transform 0.3s;
}
.help.open {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.help h2 {
  margin: 0 0 12px;
  font: 600 11px/1 var(--sans);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(15, 27, 24, 0.55);
}
.help dl {
  margin: 0;
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 8px 12px;
}
.help dt {
  font: 600 12px/1.5 var(--sans);
}
.help dd {
  margin: 0;
  color: rgba(15, 27, 24, 0.6);
}
.blackout {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: #0f1b18;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s var(--ease);
}
body.is-black .blackout {
  opacity: 1;
}
.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

@media (prefers-reduced-motion: reduce) {
  .slide.is-active .in,
  .slide.is-active .split .w > span,
  .slide.is-active .kb img,
  .slide.is-active .draw-in .d {
    animation: none !important;
  }
  .slide .in {
    opacity: 1;
  }
  .split .w > span {
    transform: none;
  }
  .slide [data-step],
  .slide [data-only] {
    transform: none;
    transition-duration: 0.3s;
  }
}

/* Display cases: soft glass, no glow unless a direction adds one */
.art .glass-f { fill: color-mix(in srgb, var(--line) 6%, transparent); }
.art .warm { fill: none; }
/* Balanced line breaks on titles (no single word left alone) */
.title, .h2, .h3, .lead-line, .display { text-wrap: balance; }

/* Film scrub (../shared/film.js): the frame canvas sits on the slide background,
   under every other layer. With reduced motion, two canvases cross-fade. */
.slide canvas.film {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
}
.slide canvas.film.xfade {
  transition: opacity 0.6s linear;
}