/* Rainbow Bridge owns only its foreground. Shared scenery and chrome stay global. */
.bridge {
  position: absolute;
  inset: 0;
  overflow: hidden;
  isolation: isolate;
}

.bridge-main {
  position: absolute;
  inset: 0;
  z-index: 2;
  min-width: 0;
  min-height: 0;
}

.bridge-picker {
  position: absolute;
  inset: calc(var(--btn) + var(--gutter) * .55) var(--gutter) var(--gutter);
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  justify-items: center;
  align-items: center;
  gap: clamp(8px, 1.5vh, 14px);
}

.bridge-subjects {
  --choice: clamp(100px, 26vh, 150px);
  display: grid;
  grid-template-columns: repeat(3, var(--choice));
  grid-auto-rows: var(--choice);
  place-content: center;
  gap: clamp(10px, 2vmin, 18px);
  min-width: 0;
  min-height: 0;
}

.bridge-picker-pages {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.bridge-picker-pages .bridge-page,
.bridge-mode-back {
  width: clamp(60px, 9vmin, 72px);
  height: clamp(60px, 9vmin, 72px);
  background: var(--sky);
}

.bridge-page-dots { display: flex; align-items: center; gap: 8px; }
.bridge-page-dots i {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(74, 59, 52, .24);
  box-shadow: inset 0 0 0 2px rgba(74, 59, 52, .25);
}
.bridge-page-dots i.is-current { background: var(--lilac-deep); }

.bridge-mode-picker {
  position: absolute;
  inset: calc(var(--btn) + var(--gutter) * .55) var(--gutter) var(--gutter);
  left: 50%;
  right: auto;
  width: min(calc(100% - var(--gutter) * 2), 1040px);
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: minmax(150px, 230px) minmax(330px, 1fr);
  grid-template-rows: minmax(0, 1fr) auto;
  place-content: center;
  align-items: center;
  justify-items: center;
  column-gap: clamp(18px, 4vw, 54px);
  row-gap: 8px;
}

.bridge-mode-subject,
.bridge-mode-choice {
  display: grid;
  place-items: center;
  color: var(--ink);
  border-radius: var(--r-card);
  outline: var(--outline) solid var(--ink);
  outline-offset: calc(var(--outline) * -1);
  box-shadow: var(--shadow-lift);
}

.bridge-mode-subject {
  grid-column: 1;
  grid-row: 1;
  width: clamp(150px, 30vh, 210px);
  height: clamp(150px, 30vh, 210px);
  padding: 8%;
  background: rgba(255, 253, 248, .94);
}

.bridge-mode-subject-art {
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
}

.bridge-mode-options {
  grid-column: 2;
  grid-row: 1 / span 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(12px, 2vw, 22px);
}

.bridge-mode-choice {
  position: relative;
  width: clamp(104px, 17vmin, 132px);
  height: clamp(104px, 17vmin, 132px);
  padding: 9%;
  transform: scale(1);
  transition: transform var(--t-release) var(--ease-overshoot), box-shadow var(--t-release) var(--ease-overshoot);
}
.bridge-mode-choice > svg { width: 100%; height: 100%; }
.bridge-mode-choice--follow { background: color-mix(in srgb, var(--paper) 74%, var(--lemon)); }
.bridge-mode-choice--copy { background: color-mix(in srgb, var(--paper) 74%, var(--lilac)); }
.bridge-mode-choice--invent { background: color-mix(in srgb, var(--paper) 74%, var(--pink)); }
.bridge-mode-choice.is-suggested { box-shadow: var(--shadow-warm), var(--glow-due); }
.bridge-mode-choice.is-done { box-shadow: var(--shadow-warm), 0 0 0 5px var(--mint); }
.bridge-mode-check {
  position: absolute;
  right: -8px;
  top: -8px;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 7px;
  border-radius: 50%;
  color: var(--ink);
  background: var(--mint);
  outline: 3px solid var(--ink);
}
.bridge-mode-check svg { width: 100%; height: 100%; }
.bridge-mode-back-wrap { grid-column: 1; grid-row: 2; }

.bridge-choice,
.bridge-model,
.bridge-action {
  display: grid;
  place-items: center;
  color: var(--ink);
  border-radius: var(--r-card);
  outline: var(--outline) solid var(--ink);
  outline-offset: calc(var(--outline) * -1);
  box-shadow: var(--shadow-warm);
  transform: scale(1);
  transition: transform var(--t-release) var(--ease-overshoot), box-shadow var(--t-release) var(--ease-overshoot);
}

.bridge-choice {
  width: var(--choice);
  height: var(--choice);
  padding: 8%;
  background: color-mix(in srgb, var(--paper) 88%, var(--sky));
}

.bridge-choice:nth-child(5n + 2) { background: color-mix(in srgb, var(--paper) 84%, var(--lemon)); }
.bridge-choice:nth-child(5n + 3) { background: color-mix(in srgb, var(--paper) 84%, var(--pink)); }
.bridge-choice:nth-child(5n + 4) { background: color-mix(in srgb, var(--paper) 84%, var(--mint)); }
.bridge-choice:nth-child(5n + 5) { background: color-mix(in srgb, var(--paper) 84%, var(--lilac)); }

.bridge-choice-art,
.bridge-model-art,
.bridge-preview-model {
  width: 100%;
  height: 100%;
  object-fit: contain;
  overflow: visible;
  pointer-events: none;
}

.bridge-choice.is-down,
.bridge-mode-choice.is-down,
.bridge-model.is-down,
.bridge-action.is-down {
  transform: scale(.96);
  box-shadow: var(--shadow-flat);
  transition: none;
}

.bridge-work {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: minmax(96px, 17%) minmax(300px, 1fr) minmax(92px, 15%);
  align-items: center;
  justify-items: center;
  gap: clamp(8px, 2vw, 24px);
  padding: var(--gutter);
}

.bridge-model {
  position: relative;
  width: clamp(96px, 15vw, 156px);
  height: clamp(96px, 15vw, 156px);
  padding: 8%;
  background: rgba(255, 253, 248, .92);
  overflow: hidden;
}

.bridge-model:disabled { opacity: 1; cursor: default; }
.bridge-model.is-hidden .bridge-model-art { opacity: 0; }
.bridge-model.is-hidden::before,
.bridge-model.is-hidden::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.bridge-model.is-hidden::before {
  width: 54%;
  height: 32%;
  border: 5px solid var(--lilac-deep);
  border-radius: 70% 18%;
  transform: translate(-50%, -50%) rotate(45deg);
}
.bridge-model.is-hidden::after {
  width: 17%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--lilac-deep);
}

.bridge-paper {
  position: relative;
  width: min(68vh, 59vw);
  height: min(68vh, 59vw);
  min-width: min(300px, 100%);
  min-height: min(300px, 100%);
  max-width: 100%;
  max-height: calc(100dvh - var(--gutter) * 2);
  border-radius: var(--r-card);
  background:
    radial-gradient(circle at 20% 16%, rgba(255, 242, 168, .18), transparent 24%),
    var(--paper);
  outline: var(--outline) solid var(--ink);
  outline-offset: calc(var(--outline) * -1);
  box-shadow: var(--shadow-lift);
  overflow: hidden;
  touch-action: none;
}

.bridge-canvas { position: absolute; inset: 0; }

.bridge-footer {
  display: grid;
  place-items: center;
  gap: clamp(12px, 3vh, 28px);
}

.bridge-steps {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.bridge-step {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 6px;
  border-radius: 50%;
  background: rgba(255, 253, 248, .78);
  outline: 3px solid rgba(74, 59, 52, .25);
}
.bridge-step svg { width: 100%; height: 100%; }
.bridge-step.is-done { background: var(--mint); outline-color: var(--mint-deep); }
.bridge-step.is-now { background: var(--lemon); outline-color: var(--ink); transform: scale(1.12); }

.bridge-action {
  width: clamp(80px, 13vmin, 104px);
  height: clamp(80px, 13vmin, 104px);
  border-radius: 50%;
  background: var(--mint);
}
.bridge-action svg { width: 58%; height: 58%; }
.bridge-action:disabled { opacity: .36; box-shadow: none; }
.bridge-action.is-ready { box-shadow: var(--shadow-warm), var(--glow-due); }
.bridge-primary { background: var(--lemon); }
.bridge-choose { background: var(--sky); }

.bridge-reward {
  position: absolute;
  inset: calc(var(--btn) + var(--gutter) * .4) var(--gutter) var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: 1fr auto;
  align-items: center;
  justify-items: center;
  gap: clamp(10px, 2vmin, 24px);
}

.bridge-preview {
  position: relative;
  grid-column: 1;
  grid-row: 1 / span 2;
  width: min(54vh, 48vw);
  height: min(54vh, 48vw);
  min-width: 220px;
  min-height: 220px;
  display: grid;
  place-items: center;
  padding: 5%;
  border-radius: var(--r-card);
  background: var(--paper);
  outline: var(--outline) solid var(--ink);
  box-shadow: var(--shadow-lift);
  overflow: hidden;
}
.bridge-preview img { width: 100%; height: 100%; object-fit: contain; }
.bridge-preview-ink { width: 100%; height: 100%; overflow: visible; }
.bridge-preview.earned-sticker::after {
  content: "";
  position: absolute;
  inset: 4%;
  border: 8px dotted var(--lemon-deep);
  border-radius: calc(var(--r-card) - 6px);
  pointer-events: none;
}

.bridge-petals {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 8px;
  min-height: 74px;
}
.bridge-petal {
  width: 38px;
  height: 54px;
  border-radius: 80% 12% 80% 12%;
  background: rgba(255, 253, 248, .72);
  border: 3px solid var(--mint-deep);
  transform: rotate(-28deg);
}
.bridge-petal:nth-child(2) { transform: translateY(-12px) rotate(45deg); }
.bridge-petal:nth-child(3) { transform: rotate(118deg); }
.bridge-petal.is-filled { background: var(--pink); border-color: var(--pink-deep); }
.bridge-petals.just-earned { animation: bridge-pop 600ms var(--ease-overshoot); }
.bridge-petals.is-flower {
  position: relative;
  width: 126px;
}
.bridge-petals.is-flower::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 51%;
  width: 28px;
  height: 28px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--lemon);
  border: 3px solid var(--lemon-deep);
}
.bridge-petals.is-flower .bridge-petal {
  position: absolute;
  left: 44px;
  top: 2px;
  background: var(--pink);
  border-color: var(--pink-deep);
}
.bridge-petals.is-flower .bridge-petal:nth-child(1) { transform: rotate(-28deg); }
.bridge-petals.is-flower .bridge-petal:nth-child(2) { transform: translate(-35px, 24px) rotate(-100deg); }
.bridge-petals.is-flower .bridge-petal:nth-child(3) { transform: translate(35px, 24px) rotate(48deg); }

.bridge-reward-actions {
  grid-column: 2;
  grid-row: 2;
  display: flex;
  gap: clamp(12px, 2vw, 24px);
}

@keyframes bridge-pop {
  0% { transform: scale(.72); opacity: .2; }
  70% { transform: scale(1.12); opacity: 1; }
  100% { transform: scale(1); }
}

@media (orientation: portrait) {
  .bridge-picker {
    grid-template-rows: auto auto;
    align-content: start;
    padding-top: clamp(44px, 8vh, 70px);
  }
  .bridge-subjects {
    --choice: clamp(116px, 34vw, 150px);
    grid-template-columns: repeat(2, var(--choice));
  }
  .bridge-mode-picker {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    place-content: start center;
    gap: clamp(16px, 3vh, 28px);
    padding-top: clamp(44px, 8vh, 70px);
  }
  .bridge-mode-subject {
    grid-column: 1;
    grid-row: 1;
    width: clamp(156px, 46vw, 216px);
    height: clamp(156px, 46vw, 216px);
  }
  .bridge-mode-options {
    grid-column: 1;
    grid-row: 2;
    gap: clamp(8px, 2vw, 14px);
  }
  .bridge-mode-choice {
    width: clamp(96px, 28vw, 118px);
    height: clamp(96px, 28vw, 118px);
  }
  .bridge-mode-back-wrap { grid-column: 1; grid-row: 3; }
  .bridge-work {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto 1fr;
    padding-top: calc(var(--btn) + var(--gutter) * 1.15);
  }
  .bridge-model {
    grid-column: 1;
    grid-row: 1;
    width: clamp(90px, 23vw, 148px);
    height: clamp(90px, 23vw, 148px);
  }
  .bridge-paper {
    grid-column: 1 / span 2;
    grid-row: 2;
    align-self: start;
    margin-top: var(--gutter);
    width: min(97vw, 58vh);
    height: min(97vw, 58vh);
  }
  .bridge-footer { grid-column: 2; grid-row: 1; grid-template-columns: auto auto; }
  .bridge-steps { flex-direction: row; }
  .bridge-reward {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr auto auto;
  }
  .bridge-preview {
    grid-column: 1;
    grid-row: 1;
    width: min(88vw, 48vh);
    height: min(88vw, 48vh);
  }
  .bridge-petals { grid-column: 1; grid-row: 2; }
  .bridge-reward-actions { grid-column: 1; grid-row: 3; }
}

@media (max-height: 470px) and (orientation: landscape) {
  .bridge-subjects { --choice: clamp(96px, 25vh, 112px); }
  .bridge-mode-subject { width: 150px; height: 150px; }
  .bridge-mode-choice { width: 108px; height: 108px; }
  .bridge-paper { width: min(94vh, 55vw); height: min(94vh, 55vw); }
  .bridge-model { width: 104px; height: 104px; }
  .bridge-reward { inset: var(--gutter); }
  .bridge-preview { min-width: 200px; min-height: 200px; width: 72vh; height: 72vh; }
  .bridge-petals { min-height: 58px; }
  .bridge-reward-actions { align-self: center; }
}

@media (prefers-reduced-motion: reduce) {
  .bridge-choice, .bridge-mode-choice, .bridge-model, .bridge-action { transition: none; }
  .bridge-petals.just-earned { animation: none; }
}
html.reduced-motion .bridge-choice,
html.reduced-motion .bridge-mode-choice,
html.reduced-motion .bridge-model,
html.reduced-motion .bridge-action { transition: none; }
html.reduced-motion .bridge-petals.just-earned { animation: none; }