:root {
  --paper: #f3e9cf;
  --paper-light: #fbf3dc;
  --paper-dark: #e1d0a2;
  --ink: #231a12;
  --ink-soft: #6b5b45;
  --ink-faint: #b4a57e;
  --vermilion: #a3301e;
  --vermilion-soft: #c26b4f;
  --matcha: #4f6a3d;
  --wood: #8b6f3e;
  --wood-dark: #5c3e1a;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  font-family: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", serif;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
  background-color: var(--paper);
  background-image:
    radial-gradient(ellipse at top, rgba(255,255,255,0.35), transparent 60%),
    radial-gradient(ellipse at bottom, rgba(120,80,40,0.08), transparent 50%),
    repeating-linear-gradient(90deg, rgba(140,100,50,0.045) 0 1px, transparent 1px 38px);
  position: relative;
  overflow-x: hidden;
}

/* 障子の格子（ごく薄く） */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, transparent 0 79px, rgba(40,24,8,0.05) 79px 80px),
    repeating-linear-gradient(90deg, transparent 0 119px, rgba(40,24,8,0.05) 119px 120px);
  z-index: 0;
}

#app {
  width: 100%;
  max-width: 760px;
  position: relative;
  z-index: 1;
}

/* 掛け軸風パネル */
.scroll {
  background:
    radial-gradient(ellipse at top, #fffaec, transparent 60%),
    var(--paper-light);
  border-left: 1px solid var(--paper-dark);
  border-right: 1px solid var(--paper-dark);
  padding: 72px 44px 56px;
  box-shadow:
    0 1px 0 var(--paper-dark) inset,
    0 30px 60px -30px rgba(0,0,0,0.35),
    0 8px 16px -12px rgba(0,0,0,0.2);
  position: relative;
  border-radius: 2px;
}

/* 軸の上下 */
.scroll::before,
.scroll::after {
  content: '';
  position: absolute;
  left: -18px;
  right: -18px;
  height: 28px;
  background: linear-gradient(180deg, #a07a44, #6a4a20 50%, #3c2810);
  border-radius: 14px;
  box-shadow: 0 4px 8px -4px rgba(0,0,0,0.4);
}
.scroll::before { top: -18px; }
.scroll::after { bottom: -18px; }

/* 軸端の金具風 */
.screen {
  position: relative;
}

.screen.hidden { display: none; }

h1 {
  font-weight: 600;
  font-size: 2rem;
  text-align: center;
  margin: 0 0 12px;
  letter-spacing: 0.2em;
  color: var(--ink);
}

.subtitle {
  text-align: center;
  color: var(--ink-soft);
  margin: 0 0 40px;
  letter-spacing: 0.15em;
  font-size: 0.95rem;
}

.guide {
  text-align: center;
  color: var(--ink-soft);
  margin: 0 0 20px;
  font-size: 0.95rem;
  letter-spacing: 0.1em;
}

.footnote {
  text-align: center;
  color: var(--ink-faint);
  margin: 32px 0 0;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}

.buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

button {
  background: transparent;
  border: 1px solid var(--ink);
  color: var(--ink);
  padding: 12px 24px;
  font-family: inherit;
  font-size: 1rem;
  cursor: pointer;
  letter-spacing: 0.2em;
  transition: background 0.15s, color 0.15s, transform 0.1s;
  border-radius: 1px;
}

button:hover {
  background: var(--ink);
  color: var(--paper-light);
}

button:active {
  transform: translateY(1px);
}

.timer {
  font-family: "Shippori Mincho", serif;
  font-size: 1.6rem;
  text-align: right;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
  margin: 0 0 28px;
  border-bottom: 1px solid var(--paper-dark);
  padding-bottom: 10px;
}

.display {
  font-size: 1.9rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.8;
  margin: 16px 0 20px;
  letter-spacing: 0.05em;
  color: var(--ink);
  min-height: 3em;
  display: flex;
  align-items: center;
  justify-content: center;
}

.kana {
  text-align: center;
  font-size: 1.15rem;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  margin: 0 0 22px;
  line-height: 1.6;
  min-height: 1.6em;
}

.kana .typed { color: var(--ink); }
.kana .current { color: var(--vermilion); font-weight: 600; }
.kana .rest { color: var(--ink-faint); }

.romaji {
  text-align: center;
  font-size: 1.5rem;
  font-family: "Menlo", "Consolas", "SF Mono", monospace;
  letter-spacing: 0.12em;
  margin: 0 0 28px;
  min-height: 1.5em;
}
.romaji .typed { color: var(--vermilion); font-weight: 600; }
.romaji .next { color: var(--ink-soft); opacity: 0.55; }

.meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
  color: var(--ink-soft);
  letter-spacing: 0.1em;
  border-top: 1px solid var(--paper-dark);
  padding-top: 14px;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 32px;
  margin: 28px 0 32px;
  font-size: 1.15rem;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}
.stat-grid dt { color: var(--ink-soft); letter-spacing: 0.1em; }
.stat-grid dd {
  margin: 0;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.credit {
  text-align: center;
  color: var(--ink-faint);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  margin: 36px 0 0;
}

.shake {
  animation: shake 0.18s;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

@media (max-width: 560px) {
  .scroll { padding: 56px 24px 44px; }
  h1 { font-size: 1.5rem; }
  .display { font-size: 1.4rem; }
  .kana { font-size: 1rem; }
  .romaji { font-size: 1.2rem; }
  .timer { font-size: 1.3rem; }
  button { padding: 10px 18px; font-size: 0.9rem; }
}