:root {
  --blush: #FDE8EC;
  --sakura: #F6A6B8;
  --peach: #FFD9B8;
  --sky: #BFE3F0;
  --matcha: #CFE3B4;
  --rose: #BC2C57;
  --ink: #4A2C3A;
  --print: #FFFFFF;

  --text-sm: 0.9375rem;
  --text-base: 1.0625rem;
  --text-lg: 1.375rem;
  --text-title: 1.75rem;
  --text-xl: 2.75rem;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;

  --radius: 0.25rem;
  --controls: calc(4rem + env(safe-area-inset-bottom));
  --hand: "Yusei Magic", "Zen Maru Gothic", sans-serif;
  --shadow: 0 2px 3px rgb(74 44 58 / 0.14), 0 10px 22px rgb(74 44 58 / 0.14);
}

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

html, body {
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
}

html {
  background: var(--blush);
  -webkit-text-size-adjust: 100%;
}

body {
  position: relative;
  margin: 0;
  height: 100dvh;
  color: var(--ink);
  background: var(--page);
  transition: background-color 0.35s ease;
  font: 500 var(--text-base)/1.55 "Zen Maru Gothic", system-ui, sans-serif;
}

h1, h2, p, figure { margin: 0; }

h1, .end h2, .note h2, figcaption {
  font-family: var(--hand);
  font-weight: 400;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: 0;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible {
  outline: 3px solid var(--rose);
  outline-offset: 2px;
}

/* The deck: every page fills the screen */
.deck {
  position: absolute;
  inset: 0;
}

.card {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: calc(var(--space-2) + env(safe-area-inset-top)) max(var(--space-3), env(safe-area-inset-right)) var(--controls) max(var(--space-3), env(safe-area-inset-left));
  overflow: hidden;
  color: var(--page-ink);
  background-color: var(--page);
  background-image: radial-gradient(circle 1.5px, var(--page-dot) 98%, transparent);
  background-size: 1.75rem 1.75rem;
  touch-action: pan-y;
  user-select: none;
  -webkit-user-select: none;
  transition: transform 0.35s ease, opacity 0.35s ease;
}

.card.dragging { transition: none; box-shadow: var(--shadow); }

.card[data-pos="past"] { transform: translateX(-110%) rotate(-3deg); visibility: hidden; transition: transform 0.35s ease, visibility 0s 0.35s; }
.card[data-pos="1"], .card[data-pos="2"], .card[data-pos="later"] { transform: none; }
.card[data-pos="later"] { visibility: hidden; }

[data-page="cover"] { --page: #FDE8EC; --page-ink: var(--ink); --page-dot: var(--sakura); --page-accent: var(--rose); }
[data-page="tokyo"] { --page: #FBD9E2; --page-ink: var(--ink); --page-dot: #F6BCCB; --page-accent: var(--rose); }
[data-page="kyoto"] { --page: #E4F0D6; --page-ink: var(--ink); --page-dot: var(--matcha); --page-accent: #4F6B2E; }
[data-page="onomichi"] { --page: #DDF0F7; --page-ink: var(--ink); --page-dot: var(--sky); --page-accent: #1F6585; }
[data-page="osaka"] { --page: #FFE8D4; --page-ink: var(--ink); --page-dot: var(--peach); --page-accent: #A94A14; }
[data-page="night"] { --page: #2E2140; --page-ink: var(--print); --page-dot: #46345E; --page-accent: var(--sakura); }

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  color: var(--page-accent);
  font-family: var(--hand);
  font-size: var(--text-lg);
  white-space: nowrap;
}

/* Photos inside a card */
.photos {
  flex: 1 1 0;
  min-height: 0;
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  gap: 0.625rem;
  padding: var(--space-1) 0.125rem;
}

.photos-2 { grid-template-rows: repeat(2, minmax(0, 1fr)); }

.photos-3 {
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  grid-template-rows: repeat(2, minmax(0, 1fr));
}

.photos-3 .print:nth-child(1) { grid-area: 1 / 2; }
.photos-3 .print:nth-child(2) { grid-area: 1 / 1 / 3 / 2; }
.photos-3 .print:nth-child(3) { grid-area: 2 / 2; }

.print {
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 0.375rem 0.375rem 0.25rem;
  background: var(--print);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  rotate: -1.2deg;
}

.print:nth-child(even) { rotate: 1.5deg; }

.print img {
  flex: 1 1 0;
  height: 0;
  min-height: 0;
  width: 100%;
  object-fit: cover;
}

.print img[src*="kei"] { object-position: 4% 50%; }
.print img[src*="vending"] { object-position: 30% 50%; }

figcaption {
  color: var(--ink);
  padding-top: 0.25rem;
  text-align: center;
  font-size: var(--text-sm);
  line-height: 1.35;
}

.note {
  flex: 0 1 auto;
  max-height: 46%;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.note h2 {
  font-size: var(--text-title);
  line-height: 1.2;
}

.note p { margin-top: 0.25rem; }
.note .next { margin-top: var(--space-1); color: var(--page-accent); font-size: var(--text-sm); font-weight: 700; }

/* Cover card */
.cover {
  justify-content: flex-end;
}

.cover-photo {
  position: absolute;
  inset: 0 0 var(--controls);
  width: 100%;
  height: calc(100% - var(--controls));
  object-fit: cover;
  object-position: 66% 50%;
}

.petals {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.petal {
  position: absolute;
  top: -1.5rem;
  left: var(--x);
  width: 0.875rem;
  height: 0.625rem;
  border-radius: 80% 10% 80% 10%;
  background: var(--sakura);
  animation: fall var(--t) linear var(--d) infinite;
}

@keyframes fall {
  to { transform: translate(3rem, 105dvh) rotate(420deg); }
}

.label {
  position: relative;
  padding: var(--space-2) var(--space-3);
  background: var(--print);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  rotate: -1.5deg;
}

.label::before {
  content: "";
  position: absolute;
  top: -0.75rem;
  left: 50%;
  width: 6rem;
  height: 1.5rem;
  translate: -50% 0;
  rotate: -3deg;
  opacity: 0.88;
  background: repeating-linear-gradient(90deg, var(--sakura) 0 0.5rem, var(--peach) 0.5rem 1rem);
}

.cat { filter: drop-shadow(0 3px 4px rgb(74 44 58 / 0.25)); }

.label #when { font-weight: 500; }

.label .cat {
  position: absolute;
  top: -3.5rem;
  right: var(--space-2);
  width: 5rem;
  rotate: 8deg;
}

.label h1 {
  color: var(--rose);
  font-size: var(--text-xl);
  line-height: 1.15;
}

.label p { font-weight: 700; line-height: 1.35; }
.label h1 + p { margin-top: 0.25rem; font-size: var(--text-lg); }

/* Goodbye card */
.end {
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  text-align: center;
}

.end .cat { width: 7rem; rotate: -5deg; }

.end h2 {
  color: var(--rose);
  font-size: var(--text-xl);
  line-height: 1.2;
}

.end p {
  font-size: var(--text-lg);
  line-height: 1.4;
  text-wrap: balance;
}

/* Page turning, drawn straight on the page */
.controls {
  position: absolute;
  inset: auto 0 0;
  z-index: 100;
  height: var(--controls);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-1);
  padding: 0.5rem max(var(--space-1), env(safe-area-inset-right)) 0 max(var(--space-1), env(safe-area-inset-left));
  color: var(--page-accent);
  transition: color 0.35s ease;
}

.controls button {
  flex: none;
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  padding: 0;
  border-radius: 50%;
  background: none;
  color: inherit;
}

.controls svg {
  width: 1.75rem;
  height: 1.75rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

#back:disabled { visibility: hidden; }

.dots {
  flex: 0 1 auto;
  min-width: 0;
  height: 2.75rem;
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.dots span {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.3;
  transition: opacity 0.2s ease, scale 0.2s ease;
}

.dots .on { opacity: 1; scale: 1.5; }

.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}

/* Short phones: side-by-side photos keep more of each picture */
@media (max-height: 41rem) {
  .photos-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: minmax(0, 1fr);
  }

  .photos-2 figcaption, .photos-3 figcaption { display: none; }
  .label h1 + p { font-size: var(--text-base); }
  .note { max-height: 58%; }
}

@media (min-width: 60rem) {
  .card { padding-inline: max(var(--space-4), calc(50vw - 32rem)); }

  .day {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    grid-template-rows: auto minmax(0, 1fr);
    column-gap: var(--space-4);
    padding-top: var(--space-4);
  }

  .card-head { grid-column: 1 / -1; }
  .note { align-self: center; max-height: 100%; }
  .label { width: 28rem; margin-bottom: var(--space-4); }
}

@media (prefers-reduced-motion: reduce) {
  .card, .card[data-pos="past"], body, .controls { transition: none; }
  .petals { display: none; }
}