:root {
  --paper: #f3efe4;
  --ink: #1c1914;
  --muted: #6f675c;
  --line: #ddd4c4;
  --accent: #7a3e28;
  --btn: #1c1914;
  --btn-ink: #f7f3ea;
  --ghost: transparent;
  --fs: 22px;
  --fresh: #7a3e28;
  color-scheme: light;
}

html[data-theme="dark"] {
  --paper: #141311;
  --ink: #f3efe6;
  --muted: #b7ab9c;
  --line: #3a342c;
  --accent: #e4b08a;
  --btn: #f3efe6;
  --btn-ink: #141311;
  --fresh: #e4b08a;
  color-scheme: dark;
}

*, *::before, *::after {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  user-select: none;
  touch-action: none;
}

html, body {
  margin: 0;
  padding: 0;
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  height: 100dvh;
  overflow: hidden;
  overscroll-behavior: none;
  background: var(--paper);
  color: var(--ink);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", YuGothic, sans-serif;
  font-weight: 500;
  -webkit-text-size-adjust: 100%;
}

body {
  display: flex;
  flex-direction: column;
}

button, .game-btn {
  font: inherit;
  min-height: 56px;
  min-width: 56px;
  border-radius: 14px;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 0.08s ease, opacity 0.08s ease;
}

button:active,
button.is-pressed {
  transform: scale(0.92);
  opacity: 0.88;
}

button:disabled {
  opacity: 0.38;
  pointer-events: none;
}

#bar, #meter {
  position: relative;
  z-index: 6;
  background: var(--paper);
}

#bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: calc(8px + env(safe-area-inset-top)) 12px 8px calc(12px + env(safe-area-inset-left));
  padding-right: calc(12px + env(safe-area-inset-right));
  border-bottom: 1px solid var(--line);
}

#bar h1 {
  margin: 0;
  flex: 1;
  min-width: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#progress-label {
  font-size: 13px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.icon-btn {
  width: 56px;
  height: 56px;
  min-width: 56px;
  min-height: 56px;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--ghost);
  color: var(--ink);
  border-radius: 12px;
  font-size: 16px;
  letter-spacing: 0;
}

#meter {
  height: 3px;
  background: var(--line);
}

#meter > span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent);
}

#stage {
  flex: 1;
  min-height: 0;
  display: flex;
  justify-content: center;
  cursor: pointer;
}

::selection {
  background: transparent;
  color: inherit;
}

#flow {
  width: min(100%, 36rem);
  height: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 28px;
  text-align: center;
}

.frame {
  margin: 0;
  font-size: var(--fs);
  font-weight: 600;
  line-height: 2.05;
  letter-spacing: 0.08em;
  padding-top: 0.45em;
}

.frame ruby {
  ruby-position: over;
}

.frame rt {
  font-size: 0.42em;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1;
}

.fresh {
  animation: rise 0.2s ease;
}

@keyframes rise {
  from { opacity: 0.2; }
  to { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .fresh { animation: none; }
}

#dock {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px 14px calc(12px + env(safe-area-inset-bottom));
  padding-left: calc(14px + env(safe-area-inset-left));
  padding-right: calc(14px + env(safe-area-inset-right));
}

.sec-row,
#dock-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sec-row button {
  flex: 0 0 56px;
  width: 56px;
}

#sec-label,
#sec-label-pause {
  flex: 1;
  min-width: 4.5em;
  text-align: center;
  font-size: 17px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

#dock button {
  flex: 1;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

#btn-next {
  flex: 1.6;
  background: var(--btn);
  color: var(--btn-ink);
  border-color: var(--btn);
}

#import {
  position: fixed;
  inset: 0;
  z-index: 9;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
  padding: calc(28px + env(safe-area-inset-top)) 22px calc(22px + env(safe-area-inset-bottom));
  background: var(--paper);
  color: var(--ink);
  overflow: auto;
}

#import[hidden] {
  display: none;
}

#import,
#import * {
  touch-action: pan-y;
}

#import button {
  touch-action: manipulation;
}

.import-label {
  font-size: 14px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

#import-text {
  width: 100%;
  min-height: 12rem;
  max-height: 40vh;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.04em;
  resize: vertical;
  -webkit-user-select: text;
  user-select: text;
  touch-action: manipulation;
}

#import-text::placeholder {
  color: var(--muted);
}

#cover,
#pause,
#done {
  position: fixed;
  inset: 0;
  z-index: 4;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 12px;
  padding: calc(28px + env(safe-area-inset-top)) 22px calc(22px + env(safe-area-inset-bottom));
  background: var(--paper);
  color: var(--ink);
}

#cover[hidden],
#pause[hidden],
#done[hidden] {
  display: none;
}

.sheet {
  width: min(100%, 36rem);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cover-copy {
  margin-top: auto;
  margin-bottom: 18px;
}

.cover-copy h2,
#done h2,
#pause h2 {
  margin: 0 0 8px;
  font-size: 40px;
  font-weight: 600;
  letter-spacing: 0.18em;
}

.by {
  margin: 0 0 18px;
  font-size: 18px;
  letter-spacing: 0.12em;
}

.lead, .note, #done p {
  margin: 0;
  font-size: 18px;
  line-height: 1.8;
  letter-spacing: 0.04em;
}

.note {
  color: var(--muted);
  font-size: 15px;
}

.primary, .ghost {
  width: 100%;
  border-radius: 14px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.primary {
  border: 0;
  background: var(--btn);
  color: var(--btn-ink);
}

.ghost {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 16px;
}

.row .pair {
  display: flex;
  align-items: center;
  gap: 8px;
}

#font-label {
  min-width: 2ch;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.chapters {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.chapters button {
  min-width: 0;
  padding: 0;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font-size: 18px;
  letter-spacing: 0.12em;
}

#pause {
  z-index: 8;
  justify-content: center;
  overflow: auto;
}

#pause,
#pause * {
  touch-action: pan-y;
}

#pause button {
  touch-action: manipulation;
}