:root {
  color-scheme: light;
  font-family: "BIZ UDPGothic", "Noto Sans JP", "Yu Gothic UI", system-ui, sans-serif;
  --paper: #eee7d7;
  --paper-deep: #e2d7bf;
  --ink: #191713;
  --ink-soft: #625c51;
  --vermilion: #a83b2c;
  --blue: #294d5d;
  --rule: rgba(25, 23, 19, 0.22);
  --safe-top: max(18px, env(safe-area-inset-top));
  --safe-bottom: max(18px, env(safe-area-inset-bottom));
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  overflow: hidden;
  color: var(--ink);
  background: #c9c0ad;
}
button, textarea, input { font: inherit; }
button { color: inherit; touch-action: manipulation; }

.device-shell {
  position: relative;
  width: min(100vw, 430px);
  height: min(100dvh, 932px);
  min-height: 600px;
  overflow: hidden;
  isolation: isolate;
  background-color: var(--paper);
  background-image: radial-gradient(rgba(35, 29, 21, .045) .65px, transparent .8px);
  background-size: 5px 5px;
  box-shadow: 0 24px 80px rgba(37, 31, 22, .24);
}
.device-shell::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 30;
  pointer-events: none;
  box-shadow: inset 0 0 72px rgba(64, 50, 30, .08);
}

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  transform: translateX(18px);
  transition: opacity 220ms ease, transform 320ms cubic-bezier(.2,.75,.2,1), visibility 220ms;
}
.screen.is-active { opacity: 1; visibility: visible; transform: none; }

.topbar {
  position: relative;
  z-index: 5;
  min-height: calc(50px + var(--safe-top));
  padding: var(--safe-top) 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--rule);
}
.wordmark { font: 700 20px/1 Georgia, serif; letter-spacing: .02em; }
.text-button, .about-button, .back-button {
  min-width: 44px;
  min-height: 44px;
  border: 0;
  padding: 0;
  background: transparent;
  cursor: pointer;
}
.text-button, .about-button { color: var(--ink-soft); font-size: 12px; text-decoration: underline; text-underline-offset: 4px; }
.back-button { font-size: 22px; text-align: left; }

.tutorial-stage { position: relative; flex: 1; min-height: 0; }
.tutorial-slide {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: 18px 22px 0;
  opacity: 0;
  transform: translateX(22px);
  pointer-events: none;
  transition: opacity 180ms ease, transform 280ms cubic-bezier(.2,.75,.2,1);
}
.tutorial-slide.is-active { opacity: 1; transform: none; pointer-events: auto; }
.folio-visual {
  position: relative;
  height: min(43dvh, 365px);
  min-height: 255px;
  overflow: hidden;
  border-top: 6px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  background: rgba(255,255,255,.16);
}
.folio-visual::before {
  content: "";
  position: absolute;
  inset: 18px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.folio-number { position: absolute; top: 30px; left: 16px; font: 400 72px/1 "Yu Mincho", serif; color: rgba(25,23,19,.11); }
.folio-caption { position: absolute; right: 14px; bottom: 29px; writing-mode: vertical-rl; font: 500 12px/1.6 "Yu Mincho", serif; letter-spacing: .16em; }
.seal-mark {
  position: absolute;
  right: 46px;
  top: 47px;
  width: 88px;
  height: 88px;
  display: grid;
  place-items: center;
  border: 4px double var(--vermilion);
  color: var(--vermilion);
  font: 700 27px/1.08 "Yu Mincho", serif;
  text-align: center;
  transform: rotate(-4deg);
}
.gesture-line { position: absolute; left: 42px; bottom: 70px; height: 1px; background: var(--ink); transform-origin: left; }
.line-a { width: 225px; transform: rotate(-15deg); }
.line-b { width: 172px; bottom: 101px; transform: rotate(12deg); }
.field-node { position: absolute; top: 48%; width: 86px; height: 86px; display: grid; place-items: center; border: 1px solid var(--ink); font: 500 16px "Yu Mincho", serif; }
.node-a { left: 34px; }
.node-b { right: 38px; border-color: var(--vermilion); color: var(--vermilion); transform: rotate(3deg); }
.field-thread { position: absolute; left: 118px; right: 120px; top: calc(48% + 43px); height: 1px; background: var(--ink); }
.field-thread::before, .field-thread::after { content: ""; position: absolute; top: -4px; width: 9px; height: 9px; background: var(--ink); transform: rotate(45deg); }
.field-thread::before { left: 28%; }.field-thread::after { right: 24%; }
.scan-bars { position: absolute; left: 40px; right: 56px; top: 66px; bottom: 62px; margin: 0; padding: 0; list-style: none; display: flex; align-items: flex-end; gap: 13px; }
.scan-bars li { flex: 1; border-top: 2px solid var(--ink); background: repeating-linear-gradient(0deg, transparent 0 9px, rgba(25,23,19,.16) 9px 10px); }
.scan-bars li:nth-child(1){height:43%}.scan-bars li:nth-child(2){height:82%}.scan-bars li:nth-child(3){height:58%}.scan-bars li:nth-child(4){height:94%;border-color:var(--vermilion)}.scan-bars li:nth-child(5){height:69%}
.record-date { position: absolute; left: 42px; top: 84px; font: 500 28px/1.65 "Yu Mincho", serif; letter-spacing: .08em; }
.record-rule { position: absolute; left: 42px; right: 96px; bottom: 78px; border-top: 1px solid var(--ink); }
.record-seal { top: auto; bottom: 92px; right: 46px; width: 76px; height: 76px; font-size: 23px; }
.section-label { margin: 18px 0 8px; color: var(--vermilion); font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.tutorial-slide h1, .ritual-content h1, .record-heading h1 {
  margin: 0;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-weight: 500;
  font-size: clamp(30px, 8.1vw, 37px);
  line-height: 1.34;
  letter-spacing: .01em;
}
.body-copy, .ritual-intro { margin: 12px 0 0; max-width: 34em; color: var(--ink-soft); font-size: 14px; line-height: 1.85; }
.body-copy strong { color: var(--ink); font-weight: 700; }
.tutorial-controls { position: relative; z-index: 6; padding: 10px 22px var(--safe-bottom); display: grid; grid-template-columns: 1fr 168px; gap: 16px; align-items: center; }
.progress-pages { display: flex; gap: 5px; }
.progress-page { width: 34px; min-height: 44px; border: 0; border-top: 1px solid var(--rule); padding: 8px 0 0; background: transparent; color: var(--ink-soft); cursor: pointer; font-size: 10px; text-align: left; }
.progress-page.is-active { border-top: 4px solid var(--vermilion); color: var(--ink); font-weight: 700; }
.primary-button {
  min-height: 56px;
  border: 1px solid var(--ink);
  border-radius: 0;
  padding: 0 18px;
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
  font-weight: 700;
  letter-spacing: .08em;
}
.primary-button:active, .start-button:active { background: var(--vermilion); border-color: var(--vermilion); }
.primary-button:disabled { opacity: .34; cursor: default; }

.title-screen { background: var(--paper); }
.title-composition { flex: 1; min-height: 0; padding: 20px 22px 0; display: flex; flex-direction: column; }
.edition-mark { margin: 0; padding-bottom: 10px; border-bottom: 1px solid var(--ink); font: 600 10px/1.2 ui-monospace, monospace; letter-spacing: .12em; }
.title-plate { height: min(28dvh, 238px); margin-top: 14px; display: grid; grid-template-columns: 1fr 80px 1fr; align-items: center; border-top: 6px solid var(--ink); border-bottom: 1px solid var(--ink); }
.title-plate span { justify-self: center; font: 500 26px "Yu Mincho", serif; writing-mode: vertical-rl; letter-spacing: .2em; }
.title-plate i { position: relative; width: 80px; height: 1px; background: var(--ink); }
.title-plate i::after { content: ""; position: absolute; top: -6px; left: 34px; width: 12px; height: 12px; background: var(--vermilion); transform: rotate(45deg); }
.title-kicker { margin: 19px 0 7px; color: var(--vermilion); font-size: 13px; font-weight: 700; letter-spacing: .14em; }
.title-composition h1 { margin: 0; font: 500 clamp(42px, 11.7vw, 54px)/1.14 "Yu Mincho", "Hiragino Mincho ProN", serif; letter-spacing: -.025em; }
.title-note { margin: 14px 0 0; color: var(--ink-soft); font-size: 12px; line-height: 1.75; }
.title-signature { margin-top: auto; display: flex; align-items: flex-end; justify-content: space-between; padding: 9px 0; border-top: 1px solid var(--rule); }
.title-signature span { color: var(--vermilion); font: 700 30px Georgia, serif; }
.title-signature b { font: 500 13px "Yu Mincho", serif; letter-spacing: .18em; }
.title-actions { padding: 12px 22px var(--safe-bottom); }
.start-button { width: 100%; min-height: 60px; display: flex; align-items: center; justify-content: space-between; border: 1px solid var(--ink); border-radius: 0; padding: 0 18px; background: transparent; cursor: pointer; font: 700 18px "Yu Mincho", serif; }
.start-button i { font: normal 24px/1 sans-serif; }
.title-actions p { margin: 9px 0 0; color: var(--ink-soft); font-size: 10px; text-align: center; }

.ritual-content { flex: 1; min-height: 0; overflow-y: auto; padding: 13px 22px 10px; scrollbar-width: none; }
.ritual-content::-webkit-scrollbar, .record-sheet::-webkit-scrollbar { display: none; }
.ritual-intro { margin-bottom: 18px; }
.step-count, .sample-badge { color: var(--ink-soft); font: 600 10px/1 ui-monospace, monospace; letter-spacing: .1em; }
.sample-badge { color: var(--vermilion); }
.upload-sheet { position: relative; min-height: 164px; display: grid; place-items: center; align-content: center; gap: 5px; overflow: hidden; border: 1px solid var(--ink); background: rgba(255,255,255,.13); cursor: pointer; }
.upload-sheet input { position: absolute; z-index: 4; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }
.upload-preview { position: absolute; inset: 0; background: center / cover no-repeat; opacity: 0; pointer-events: none; }
.upload-preview::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(238,231,215,.16), rgba(238,231,215,.76)); }
.upload-sheet.has-image .upload-preview { opacity: 1; }
.upload-index { position: absolute; top: 9px; left: 10px; font: 600 10px ui-monospace, monospace; }
.upload-mark, .upload-title, .upload-note { position: relative; z-index: 1; }
.upload-mark { color: var(--vermilion); font: 300 34px/1 serif; }
.upload-title { font: 700 14px "Yu Mincho", serif; }
.upload-note { color: var(--ink-soft); font-size: 10px; }
.intention-field { display: block; margin-top: 16px; }
.intention-field > span { display: block; margin-bottom: 7px; font: 700 12px "Yu Mincho", serif; }
.intention-field > span b { margin-right: 8px; font: 600 10px ui-monospace, monospace; }
.intention-field textarea { width: 100%; min-height: 112px; resize: none; border: 1px solid var(--ink); border-radius: 0; padding: 13px 14px; outline: none; background: rgba(255,255,255,.15); color: var(--ink); font-size: 16px; line-height: 1.65; }
.intention-field textarea::placeholder { color: rgba(25,23,19,.4); }
.intention-field small { display: block; margin-top: 5px; color: var(--ink-soft); font: 500 10px ui-monospace, monospace; text-align: right; }
.ritual-footer { padding: 9px 22px var(--safe-bottom); }
.ritual-footer .primary-button { width: 100%; }

.record-sheet { flex: 1; min-height: 0; overflow-y: auto; padding: 18px 22px calc(var(--safe-bottom) + 28px); scrollbar-width: none; }
.record-heading { display: grid; grid-template-columns: 108px 1fr; gap: 16px; padding: 0 0 18px; border-bottom: 1px solid var(--ink); }
.record-target { width: 108px; height: 138px; display: grid; place-items: center; border: 1px solid var(--ink); background: var(--paper-deep) center/cover no-repeat; color: var(--ink-soft); font-size: 10px; }
.record-heading .section-label { margin-top: 0; }
.record-heading h1 { font-size: 24px; line-height: 1.38; }
.record-heading time { display: block; margin-top: 13px; font: 500 10px ui-monospace, monospace; }
.record-intention { display: grid; grid-template-columns: 55px 1fr; gap: 14px; padding: 15px 0; border-bottom: 1px solid var(--rule); }
.record-intention span { color: var(--vermilion); font: 700 12px "Yu Mincho", serif; }
.record-intention p { margin: 0; font-size: 13px; line-height: 1.7; }
.ranking-heading { display: flex; align-items: baseline; justify-content: space-between; padding: 20px 0 9px; border-bottom: 4px solid var(--ink); }
.ranking-heading h2 { margin: 0; font: 500 20px "Yu Mincho", serif; }
.ranking-heading span { color: var(--ink-soft); font-size: 9px; }
.resonance-list { margin: 0; padding: 0; list-style: none; counter-reset: resonance; }
.resonance-list li { counter-increment: resonance; min-height: 62px; display: grid; grid-template-columns: 32px 44px 1fr; gap: 10px; align-items: center; border-bottom: 1px solid var(--rule); }
.resonance-list li::before { content: counter(resonance, decimal-leading-zero); color: var(--vermilion); font: 600 10px ui-monospace, monospace; }
.entry-image { width: 44px; height: 44px; border: 1px solid var(--rule); background-color: var(--paper-deep); background-image: linear-gradient(135deg, transparent 45%, rgba(168,59,44,.24) 46% 53%, transparent 54%); }
.entry-copy strong { display: block; font: 600 13px/1.45 "Yu Mincho", serif; }
.entry-copy span { display: block; color: var(--ink-soft); font-size: 9px; margin-top: 2px; }
.record-proof { margin: 24px 0 0; padding: 18px 13px; border: 3px double var(--vermilion); color: var(--vermilion); font: 700 14px/1.75 "Yu Mincho", serif; text-align: center; transform: rotate(-.5deg); }
.toast { position: absolute; z-index: 20; left: 22px; right: 22px; bottom: calc(var(--safe-bottom) + 10px); padding: 13px; border: 1px solid var(--ink); background: var(--paper); font-size: 12px; line-height: 1.5; opacity: 0; transform: translateY(10px); pointer-events: none; transition: opacity 160ms ease, transform 180ms ease; }
.toast.is-visible { opacity: 1; transform: none; }
button:focus-visible, textarea:focus-visible, .upload-sheet:focus-within { outline: 3px solid var(--blue); outline-offset: 3px; }

@media (max-height: 720px) {
  .folio-visual { height: 31dvh; min-height: 195px; }
  .tutorial-slide h1 { font-size: 27px; }
  .body-copy { font-size: 12px; line-height: 1.65; }
  .title-plate { height: 21dvh; min-height: 150px; }
  .title-composition h1 { font-size: 39px; }
}
@media (min-width: 600px) { .device-shell { border: 1px solid rgba(25,23,19,.25); } }
@media (orientation: landscape) and (max-height: 500px) {
  .device-shell { width: min(100vw, 844px); height: 100dvh; min-height: 0; }
  .tutorial-screen, .title-screen { overflow-y: auto; }
  .tutorial-stage { flex: 0 0 490px; }
  .title-composition { flex: 0 0 auto; min-height: 470px; }
  .topbar { --safe-top: max(8px, env(safe-area-inset-top)); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 1ms !important; }
}