*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f5f5f0;
}

/* --- Page Carousel --- */

.carousel {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  height: 100%;
  scrollbar-width: none;
}

.carousel::-webkit-scrollbar {
  display: none;
}

.page {
  flex: 0 0 100%;
  scroll-snap-align: start;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 16px;
}

.page-inner {
  position: relative;
  width: 100%;
  max-width: 500px;
  aspect-ratio: 2 / 3;
  background: white;
  border-radius: 4px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  /* Container for cqw units used by .text-element font sizes */
  container-type: inline-size;
}

/* --- Cover page --- */

.page-inner--cover {
  background-image: url("assets/cover-background.webp");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

/* Title slip: a light, aged-paper rectangle that sits behind the
   cover's vertical kanji (御朱印帳 阮). Positioned to enclose the text
   element at x:10%, y:7% (see data.json). */
.page-inner--cover::before {
  content: "";
  position: absolute;
  left: 6%;
  top: 4%;
  width: 17%;
  height: 66.66%;
  background: #ece0bf;
  background-image: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.18) 0%,
    rgba(0, 0, 0, 0.08) 100%
  );
  border: 1px solid rgba(90, 60, 25, 0.25);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
  z-index: 0;
}

/* Keep text elements above the slip */
.page-inner--cover .text-element {
  z-index: 1;
}

/* --- Text Elements --- */

.text-element {
  position: absolute;
  font-family: "Noto Serif JP", serif;
  line-height: 1.4;
  white-space: nowrap;
}

.text-element.vertical {
  writing-mode: vertical-rl;
  white-space: normal;
}

/* Semantic font sizes (in cqw — % of the page-inner width). Kept as named
   presets for backwards compatibility; for finer control set fontSize to a
   number in data.json (e.g. fontSize: 12 → 12cqw). */
.text-element.size-small {
  font-size: 4cqw;
}

.text-element.size-medium {
  font-size: 6cqw;
  font-weight: 700;
}

.text-element.size-large {
  font-size: 9cqw;
  font-weight: 700;
}

.text-element.size-xlarge {
  font-size: 14cqw;
  font-weight: 900;
}

.text-element.color-red {
  color: #c41e1e;
}

.text-element.color-black {
  color: #1a1a1a;
}

/* --- Page Indicators --- */

.page-indicators {
  position: fixed;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 5;
}

.page-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.2);
  transition: background 0.2s;
}

.page-dot.active {
  background: rgba(0, 0, 0, 0.6);
}

/* --- Navigation Arrows (laptop) --- */

.nav-arrow {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.05);
  border: none;
  font-size: 36px;
  color: rgba(0, 0, 0, 0.3);
  cursor: pointer;
  padding: 16px 12px;
  border-radius: 8px;
  z-index: 5;
  opacity: 0;
  transition: opacity 0.2s, background 0.2s, color 0.2s;
  -webkit-tap-highlight-color: transparent;
}

.nav-arrow:hover {
  background: rgba(0, 0, 0, 0.1);
  color: rgba(0, 0, 0, 0.6);
}

.nav-arrow-left {
  left: 12px;
}

.nav-arrow-right {
  right: 12px;
}

/* Show arrows on hover (non-touch devices) */
@media (hover: hover) {
  body:hover .nav-arrow {
    opacity: 1;
  }
}

/* Hide arrows on small touch screens */
@media (max-width: 600px) {
  .nav-arrow {
    display: none;
  }
}

/* --- Info Button --- */

.info-button {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 8;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  border: none;
  border-radius: 20px;
  padding: 8px 24px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.2s;
}

.info-button:hover {
  background: rgba(0, 0, 0, 0.85);
}

.info-button.hidden {
  display: none;
}

/* --- Overlay Card --- */

.card-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 9;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.card-backdrop.visible {
  opacity: 1;
  pointer-events: auto;
}

.card {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10;
  background: white;
  border-radius: 16px 16px 0 0;
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.15);
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.2, 0, 0, 1);
  max-height: 100vh;
  max-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding-bottom: env(safe-area-inset-bottom, 0);
}

.card.open {
  transform: translateY(0);
}

.card-close {
  position: absolute;
  top: 8px;
  right: 12px;
  background: none;
  border: none;
  font-size: 28px;
  color: #999;
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
  z-index: 1;
  -webkit-tap-highlight-color: transparent;
}

.card-close:hover {
  color: #333;
}

.card-content {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 16px 20px 24px;
  flex: 1;
  min-height: 0;
}

/* --- Card Content Styling --- */

.card-title {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 4px;
}

.card-commentary {
  font-size: 14px;
  color: #666;
  margin-bottom: 12px;
}

.card-links {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.card-links a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  color: #4a7c9e;
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  background: #f0f4f7;
}

.card-links a:hover {
  background: #e0eaf0;
}

.card-divider {
  border: none;
  border-top: 1px solid #eee;
  margin: 0 0 16px;
}

.phrase-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.phrase-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.phrase-kanji {
  font-family: "Noto Serif JP", serif;
  font-size: 22px;
  font-weight: 700;
  color: #1a1a1a;
}

.phrase-romaji {
  font-size: 14px;
  color: #888;
  font-style: italic;
}

.phrase-english {
  font-size: 15px;
  color: #444;
}

.phrase-commentary {
  font-size: 13px;
  color: #888;
  font-style: italic;
}