/* "How it works" film. Scenes are driven by data-scene on .film, and the
   beats inside a scene by b-* classes that accumulate until the next scene. */

.film {
  margin: 0 auto clamp(3rem, 2rem + 4vw, 5rem);
  max-width: 62rem;
}
.film__frame {
  position: relative;
  border-radius: 26px;
  background: var(--paper-deep);
  box-shadow: 8px 8px 0 var(--blue);
  overflow: hidden;
}
.film__stage {
  display: block;
  width: 100%;
  height: auto;
}
.film__chapter {
  position: absolute;
  top: clamp(0.7rem, 0.4rem + 1vw, 1.2rem);
  left: clamp(0.8rem, 0.5rem + 1vw, 1.4rem);
  margin: 0;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  background: var(--paper);
  font-size: 0.72rem;
}

/* Captions read like subtitles: big, short, one line of voice-over each. */
.film__caption {
  min-height: 5.6rem;
  padding: 1.1rem 0.2rem 0;
}
.film__caption p {
  margin: 0;
  max-width: 46ch;
  font: 700 var(--step-1) / 1.35 var(--body);
}
.film__caption .film__note {
  margin-top: 0.5rem;
  font: 400 var(--step-0) / 1.4 var(--body);
  color: var(--ink-soft);
}

.film__controls {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-top: 1rem;
}
.film__btn {
  flex: none;
  display: grid;
  place-items: center;
  min-width: 2.75rem;
  height: 2.75rem;
  border: 0;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
}
.film__btn:hover,
.film__btn:focus-visible {
  background: var(--violet);
}
.film__btn--sound {
  padding: 0 1rem;
  background: transparent;
  color: var(--ink);
  box-shadow: inset 0 0 0 2px var(--ink);
  font: 700 var(--step--1) / 1 var(--body);
}
.film__btn--sound:hover,
.film__btn--sound:focus-visible {
  color: var(--paper);
}
.film__btn--sound[aria-pressed="true"] {
  background: var(--yellow);
  color: var(--ink);
}
.film__play-icon {
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0.5rem 0 0.5rem 0.8rem;
  border-color: transparent transparent transparent currentColor;
  margin-left: 0.2rem;
}
.film.is-playing .film__btn .film__play-icon {
  width: 0.75rem;
  height: 0.95rem;
  margin: 0;
  border-width: 0 0.24rem;
  border-color: currentColor;
}
.film__segs {
  flex: 1;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.film__segs li {
  flex: 1;
}
.film__seg {
  display: block;
  width: 100%;
  height: 2.75rem; /* tap target; the visible bar is the span */
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}
.film__seg span {
  display: block;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(var(--pink), var(--pink)) no-repeat 0 0 / var(--p, 0%) 100%, rgb(34 26 58 / 0.14);
}
.film__seg:hover span,
.film__seg:focus-visible span {
  background-color: rgb(34 26 58 / 0.3);
}

.film__big-play {
  position: absolute;
  inset: auto 0 clamp(1rem, 4%, 2rem) 0;
  margin: 0 auto;
  width: max-content;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.9rem 1.4rem 0.9rem 1.1rem;
  border: 0;
  border-radius: 999px;
  background: var(--pink);
  color: var(--ink);
  box-shadow: var(--misreg) var(--misreg) 0 var(--blue);
  font: 800 var(--step-0) / 1 var(--display);
  font-stretch: 105%;
  cursor: pointer;
}
.film__big-play:hover,
.film__big-play:focus-visible {
  background: var(--violet);
  color: var(--paper);
}
.film__len {
  font-weight: 500;
}
.film.has-started .film__big-play {
  display: none;
}

.film__end {
  position: absolute;
  inset: 0;
  display: flex;
  flex-wrap: wrap;
  align-content: center;
  justify-content: center;
  gap: 0.8rem 1.4rem;
  padding: 1rem;
  background: rgb(243 242 238 / 0.9);
}
.film__end[hidden] {
  display: none;
}
.film__end .btn {
  flex-basis: 100%;
  max-width: max-content;
}

.film__script {
  margin-top: 1.2rem;
  color: var(--ink-soft);
}
.film__script summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--ink);
}
.film__script ol {
  margin: 0.8rem 0 0;
  padding-left: 1.3rem;
  display: grid;
  gap: 0.4rem;
}

/* ---------------------------------------------------------------- Stage */

.film .fx,
.film .scr,
.film .fx-photo {
  transform-box: fill-box;
  transform-origin: center;
}
.film .fx {
  opacity: 0;
  transition: opacity 0.45s ease, transform 0.8s cubic-bezier(0.2, 0.9, 0.3, 1.15);
}
.film .scr {
  opacity: 0;
  transition: opacity 0.3s ease;
}

/* Type */
.fx-label {
  font: 600 15px var(--body);
  fill: var(--ink-soft);
}
.fx-label--pink {
  fill: var(--pink);
  font-weight: 800;
}
.fx-label--blue {
  fill: var(--blue);
  font-weight: 800;
}
.fx-seal {
  font: 900 34px var(--display);
  fill: var(--paper);
}
.fx-seal-sm {
  font: 900 17px var(--display);
  fill: var(--paper);
}
.fx-h {
  font: 800 19px var(--display);
  fill: var(--ink);
}
.fx-row {
  font: 700 15px var(--body);
  fill: var(--ink);
}
.fx-tiny {
  font: 700 10.5px var(--body);
  letter-spacing: 0.08em;
  fill: var(--ink);
}
.fx-soft {
  opacity: 0.6;
}
.fx-ghost {
  fill: var(--paper);
  opacity: 0.35;
}
.fx-on-dark {
  fill: var(--paper);
}
.fx-yellow {
  fill: var(--yellow);
}
.fx-pink {
  fill: var(--pink);
}
.fx-code {
  font: 900 30px var(--display);
  letter-spacing: 0.06em;
  fill: var(--ink);
}
.fx-code-sm {
  font: 900 15px var(--display);
  letter-spacing: 0.05em;
  fill: var(--ink);
}
.fx-btn {
  font: 800 14px var(--display);
  fill: var(--ink);
}
.fx-scr-h {
  font: 900 17px var(--display);
  font-stretch: 78%;
}
.fx-small {
  font: 600 11px var(--body);
}
.fx-btn.fx-on-dark {
  fill: var(--paper);
}
.fx-n {
  font: 900 96px var(--display);
  fill: var(--pink);
  opacity: 0;
}
.fx-baby {
  font: 900 30px var(--display);
  fill: var(--yellow);
}
.fx-baby-sm {
  font: 900 14px var(--display);
  fill: var(--yellow);
}
.fx-emoji {
  font-size: 30px;
}

/* Parts */
.fx-black {
  fill: #000;
}
.fx-photo {
  fill: var(--violet);
  stroke: var(--paper);
  stroke-width: 2;
  transition: transform 0.9s cubic-bezier(0.5, 0, 0.3, 1), opacity 0.4s ease;
}
.fx-reader-box {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 3;
}
.fx-track {
  fill: rgb(34 26 58 / 0.1);
}
.fx-bar {
  fill: var(--blue);
  transform-box: fill-box;
  transform-origin: left center;
  transform: scaleX(0);
  transition: transform 0.85s ease;
}
.fx-check,
.fx-okcheck {
  fill: none;
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 40;
  stroke-dashoffset: 40;
  transition: stroke-dashoffset 0.35s ease;
}
.fx-check {
  stroke: var(--pink);
}
.fx-okcheck {
  stroke: var(--paper);
  transition-delay: 0.25s;
}
.fx-match {
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
  transform: scale(0.8);
  transition: opacity 0.3s, transform 0.4s cubic-bezier(0.3, 1.6, 0.5, 1);
}
.fx-match rect {
  fill: var(--yellow);
  stroke: var(--ink);
  stroke-width: 2.5;
}
.fx-match text {
  font: 800 16px var(--display);
  fill: var(--ink);
}
.fx-deleted {
  opacity: 0;
  transition: opacity 0.4s;
}
.fx-bubble {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 3;
}
.fx-said {
  font: 800 19px var(--display);
  font-stretch: 88%;
  fill: var(--ink);
}
.fx-wave {
  stroke-linecap: round;
  animation: fx-wave 0.9s ease-in-out infinite;
}
.fx-wave.w2 {
  animation-delay: 0.15s;
}
@keyframes fx-wave {
  50% {
    opacity: 0.2;
  }
}
.fx-tap {
  fill: none;
  stroke: var(--ink);
  stroke-width: 3;
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
}
.fx-flash {
  fill: var(--paper);
  opacity: 0;
}
.fx-spin {
  fill: none;
  stroke: var(--pink);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-dasharray: 50 70;
  transform-box: fill-box;
  transform-origin: center;
  animation: fx-spin 0.9s linear infinite;
}
@keyframes fx-spin {
  to {
    transform: rotate(360deg);
  }
}
.fx-outline {
  fill: none;
  stroke: var(--paper);
  stroke-width: 2;
}
.fx-fakeout rect {
  fill: var(--yellow);
  stroke: var(--ink);
  stroke-width: 3;
}
.fx-fakeout text {
  font: 800 18px var(--display);
  fill: var(--ink);
}
.fx-fakeout {
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center bottom;
  transform: scale(0.6);
  transition: opacity 0.25s, transform 0.45s cubic-bezier(0.3, 1.7, 0.5, 1);
}
.fx-lifter {
  transform-box: fill-box;
  transform-origin: left bottom;
  transition: transform 0.6s cubic-bezier(0.3, 1.4, 0.5, 1);
}
.fx-face {
  transform-box: fill-box;
  transform-origin: center;
  transition: transform 0.6s cubic-bezier(0.4, 1.3, 0.5, 1);
}
.eyes-shut,
.fx-away {
  opacity: 0;
  transition: opacity 0.3s;
}
.eyes-open {
  transition: opacity 0.2s;
}
.fam-avatar,
.fam-code,
.fam-cups,
.fam-reveal {
  opacity: 0;
  transition: opacity 0.35s;
}

/* ---------------------------------------------------------------- Scenes */

/* Who's on stage */
.film[data-scene="sealed"] .fx-env,
.film:is([data-scene="dark"], [data-scene="look"], [data-scene="read"], [data-scene="retry"], [data-scene="success"], [data-scene="lock"], [data-scene="invite"], [data-scene="play"], [data-scene="reveal"]) .fx-phone,
.film:is([data-scene="dark"], [data-scene="look"], [data-scene="read"], [data-scene="retry"], [data-scene="success"]) .fx-head,
.film:is([data-scene="look"].b-card, [data-scene="read"], [data-scene="retry"], [data-scene="success"]) .fx-card,
.film[data-scene="look"].b-card .fx-camnote,
.film[data-scene="read"] .fx-reader,
.film[data-scene="read"].b-fly .fx-photos,
.film:is([data-scene="retry"], [data-scene="success"]).b-say .fx-say,
.film[data-scene="lock"] .fx-cups,
.film[data-scene="lock"] .fx-token,
.film[data-scene="invite"].b-send .fx-flycode,
.film:is([data-scene="invite"], [data-scene="play"], [data-scene="reveal"]) .fx-family,
.film[data-scene="reveal"].b-burst .fx-confetti {
  opacity: 1;
}

/* Entrances */
.film .fx-env {
  transform: translateY(16px) rotate(-3deg);
}
.film[data-scene="sealed"] .fx-env {
  transform: none;
  animation: fx-wiggle 1.6s ease-in-out 0.8s 2;
}
@keyframes fx-wiggle {
  20% {
    transform: rotate(-2.5deg);
  }
  40% {
    transform: rotate(2deg);
  }
  60% {
    transform: none;
  }
}
.film .fx-phone {
  transform: translateY(40px);
}
.film:not([data-scene="sealed"]) .fx-phone {
  transform: none;
}
.film .fx-head {
  transform: translateX(-30px);
}
.film:is([data-scene="dark"], [data-scene="look"], [data-scene="read"], [data-scene="retry"], [data-scene="success"]) .fx-head {
  transform: none;
}
.film .fx-card {
  transform: translate(150px, -10px) rotate(12deg);
}
.film:is([data-scene="look"].b-card, [data-scene="read"], [data-scene="retry"], [data-scene="success"]) .fx-card {
  transform: none;
}
.film[data-scene="success"].b-back .fx-card {
  opacity: 0;
  transform: translate(40px, 200px) rotate(30deg); /* back in the envelope, unseen */
}
.film .fx-reader,
.film .fx-cups,
.film .fx-family {
  transform: translateX(40px);
}
.film:is([data-scene="read"]) .fx-reader,
.film[data-scene="lock"] .fx-cups,
.film:is([data-scene="invite"], [data-scene="play"], [data-scene="reveal"]) .fx-family {
  transform: none;
}
.film .fx-say {
  transform: scale(0.85);
  transform-origin: left bottom;
}
.film.b-say .fx-say {
  transform: none;
}
.say-ok,
.say-fail {
  opacity: 0;
}
.film[data-scene="retry"] .say-fail,
.film[data-scene="success"] .say-ok {
  opacity: 1;
}

/* Looking away: flip the face, shut the eyes */
.film:is([data-scene="look"].b-turn, [data-scene="read"], [data-scene="retry"], [data-scene="success"]:not(.b-back)) .fx-face {
  transform: scaleX(-1);
}
.film:is([data-scene="look"].b-turn, [data-scene="read"], [data-scene="retry"], [data-scene="success"]:not(.b-back)) :is(.eyes-shut, .fx-away) {
  opacity: 1;
}
.film:is([data-scene="look"].b-turn, [data-scene="read"], [data-scene="retry"], [data-scene="success"]:not(.b-back)) .eyes-open {
  opacity: 0;
}

/* Phone screens */
.film[data-scene="dark"]:not(.b-black) .scr-app,
.film[data-scene="dark"].b-black .scr-dark,
.film[data-scene="look"]:not(.b-n3) .scr-dark,
.film[data-scene="look"].b-n3 .scr-count,
.film[data-scene="read"] .scr-read,
.film[data-scene="retry"] .scr-fail,
.film:is([data-scene="success"], [data-scene="lock"]) .scr-ok,
.film[data-scene="invite"] .scr-code,
.film[data-scene="play"] .scr-cups,
.film[data-scene="reveal"] .scr-reveal {
  opacity: 1;
}
.film:is([data-scene="success"], [data-scene="lock"]) .fx-okcheck {
  stroke-dashoffset: 0;
}
.film[data-scene="dark"].b-tap .fx-tap {
  animation: fx-tap 0.6s ease-out;
}
@keyframes fx-tap {
  from {
    opacity: 0.8;
    transform: scale(0.4);
  }
  to {
    opacity: 0;
    transform: scale(1.8);
  }
}
.film.b-n3:not(.b-n2) .n3,
.film.b-n2:not(.b-n1) .n2,
.film.b-n1:not(.b-flash) .n1 {
  opacity: 1;
}
.film.b-flash .fx-flash {
  animation: fx-flash 0.7s ease-out;
}
@keyframes fx-flash {
  from {
    opacity: 0.95;
  }
  to {
    opacity: 0;
  }
}

/* Reader */
.film[data-scene="read"].b-fly .ph1 {
  transform: translate(344px, 0) scale(0.7);
}
.film[data-scene="read"].b-fly .ph2 {
  transform: translate(330px, -18px) scale(0.7);
  transition-delay: 0.1s;
}
.film[data-scene="read"].b-fly .ph3 {
  transform: translate(316px, -36px) scale(0.7);
  transition-delay: 0.2s;
}
.film[data-scene="read"].b-r1 .fx-photo {
  opacity: 0;
}
.film.b-r1 .bar1,
.film.b-r2 .bar2 {
  transform: scaleX(1);
}
.film.b-r2 .ck1,
.film.b-match .ck2 {
  stroke-dashoffset: 0;
}
.film.b-match .fx-match {
  opacity: 1;
  transform: none;
}
.film.b-deleted .fx-deleted {
  opacity: 1;
}

/* Under a cup */
.film .fx-token {
  transition: transform 1s cubic-bezier(0.5, -0.3, 0.4, 1), opacity 0.4s ease 0.6s;
}
.film[data-scene="lock"].b-drop .fx-token {
  transform: translate(272px, 52px) scale(0.6);
  opacity: 0;
}
/* Neighbours swap places and back, shell-game style: one over, one under. */
.film[data-scene="lock"].b-shuffle .fx-cup {
  animation: fx-swap 0.6s ease-in-out 4 alternate;
}
.film[data-scene="lock"].b-shuffle :is(.c1, .c3, .c5, .c7) {
  animation-name: fx-swap-back;
}
@keyframes fx-swap {
  50% {
    transform: translate(33px, -16px);
  }
  to {
    transform: translate(66px, 0);
  }
}
@keyframes fx-swap-back {
  50% {
    transform: translate(-33px, 12px);
  }
  to {
    transform: translate(-66px, 0);
  }
}

/* Family */
.film .fx-flycode {
  transition: transform 0.9s cubic-bezier(0.5, 0, 0.3, 1), opacity 0.3s;
}
.film[data-scene="invite"].b-send .fx-flycode {
  transform: translate(259px, 20px) scale(1.4);
}
.film[data-scene="invite"].b-joined .fx-flycode {
  opacity: 0;
}
.film[data-scene="invite"]:not(.b-joined) .fam-avatar,
.film[data-scene="invite"].b-joined .fam-code,
.film[data-scene="play"] .fam-cups,
.film[data-scene="reveal"] .fam-reveal {
  opacity: 1;
}
.film[data-scene="play"].b-lift .fx-lifter {
  transform: translate(10px, -22px) rotate(-16deg);
}
.film[data-scene="play"].b-fakeout .fx-fakeout {
  opacity: 1;
  transform: none;
}

/* Confetti */
.film.b-burst .cf {
  animation: fx-fall 2.6s cubic-bezier(0.3, 0.2, 0.6, 1) forwards;
}
.film.b-burst .cf1 {
  animation-duration: 3s;
  animation-delay: 0.15s;
}
.film.b-burst .cf2 {
  animation-duration: 2.3s;
  animation-delay: 0.3s;
}
.film.b-burst .cf3 {
  animation-duration: 3.3s;
}
@keyframes fx-fall {
  from {
    transform: translateY(0) rotate(0);
  }
  to {
    transform: translateY(440px) rotate(540deg);
  }
}
.film .cf {
  transform-box: fill-box;
  transform-origin: center;
}

@media (max-width: 40rem) {
  .film__chapter {
    display: none; /* the caption says it, and the art needs the room */
  }
  .film__frame {
    border-radius: 18px;
    box-shadow: 5px 5px 0 var(--blue);
  }
  .film__caption {
    min-height: 7.4rem;
  }
  .film__big-play {
    font-size: 0.95rem;
    padding: 0.75rem 1.1rem 0.75rem 0.9rem;
  }
  .film__len {
    display: none;
  }
}