/* そのまま英語 — 紙とインクの静かな見た目 */

:root {
  --paper: #f7f4ee;
  --card: #fffdf8;
  --ink: #29261f;
  --sub: #8a8375;
  --line: #e6dfd0;
  --accent: #3c6e5b;
  --accent-soft: #e3ede8;
  --marker: #fdeeb9;
  --bad: #b0563e;
  --serif: 'Iowan Old Style', 'Palatino Linotype', Georgia, 'Times New Roman', serif;
}

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

body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'Hiragino Kaku Gothic ProN', 'Yu Gothic', system-ui, sans-serif;
  line-height: 1.7;
  min-height: 100vh;
}

/* ---------- ヘッダー ---------- */

.top {
  max-width: 640px;
  margin: 0 auto;
  padding: 18px 20px 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--serif);
  font-size: 24px;
  border-radius: 10px;
}

.brand h1 { font-size: 19px; letter-spacing: .04em; }
.brand-sub { font-size: 11px; color: var(--sub); letter-spacing: .06em; }

.quota {
  font-size: 12px;
  color: var(--sub);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 12px;
  white-space: nowrap;
}
.quota b { color: var(--accent); font-size: 14px; }

/* ---------- 画面共通 ---------- */

.screen {
  max-width: 640px;
  margin: 0 auto;
  padding: 18px 20px 60px;
}

.go {
  display: block;
  width: 100%;
  padding: 15px;
  margin-top: 18px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 17px;
  font-weight: 700;
  font-family: inherit;
  letter-spacing: .08em;
  cursor: pointer;
  transition: transform .08s, opacity .15s;
}
.go:active { transform: scale(.985); }
.go:disabled { opacity: .4; cursor: default; }

.btn-plain {
  display: block;
  width: 100%;
  padding: 12px;
  margin-top: 10px;
  background: none;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--sub);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
}

.note { text-align: center; font-size: 12px; color: var(--sub); margin-top: 12px; }
.hint { font-size: 13px; color: var(--sub); text-align: center; }

/* ---------- ホーム ---------- */

.philosophy {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 20px;
  margin-top: 8px;
}

.ph-big {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
}

.ph-body { font-size: 14px; color: #4d483d; }
.ph-body b { color: var(--accent); }
.ph-body em { font-style: normal; background: linear-gradient(transparent 62%, var(--marker) 62%); }

.pick { margin-top: 22px; }
.pick-label { font-size: 13px; font-weight: 700; color: var(--sub); margin: 14px 0 8px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  padding: 8px 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  font-family: inherit;
  color: var(--ink);
  cursor: pointer;
  transition: all .12s;
}
.chip.on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 700;
}

/* ---------- ローディング ---------- */

.loading { text-align: center; padding: 70px 0; }
.loading p { margin-top: 18px; color: var(--sub); font-size: 14px; }

/* AIはらだくん（丸メガネの先生） */
.harada {
  display: inline-block;
  border-radius: 50%;
  background:
    radial-gradient(circle at 33% 46%, transparent 8px, var(--ink) 8px, var(--ink) 9.5px, transparent 9.5px),
    radial-gradient(circle at 67% 46%, transparent 8px, var(--ink) 8px, var(--ink) 9.5px, transparent 9.5px),
    radial-gradient(circle at 33% 46%, var(--ink) 2.5px, transparent 3px),
    radial-gradient(circle at 67% 46%, var(--ink) 2.5px, transparent 3px),
    radial-gradient(ellipse 12px 7px at 50% 72%, transparent 5px, var(--ink) 5.5px, var(--ink) 6.5px, transparent 7px),
    linear-gradient(#f2dabc, #f2dabc);
  border: 2px solid var(--ink);
  position: relative;
}
.harada::before {
  content: '';
  position: absolute;
  top: -14%; left: 8%;
  width: 84%; height: 34%;
  background: var(--ink);
  border-radius: 50% 50% 40% 40%;
}
.harada.big { width: 84px; height: 84px; animation: bob 1.6s ease-in-out infinite; }
.harada.small { width: 44px; height: 44px; flex-shrink: 0; }

@keyframes bob { 0%,100% { transform: translateY(0);} 50% { transform: translateY(-6px);} }

/* ---------- 読む ---------- */

.lesson-title {
  font-family: var(--serif);
  font-size: 15px;
  color: var(--sub);
  text-align: center;
  letter-spacing: .1em;
  margin-bottom: 10px;
}

.stage {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px 22px;
  min-height: 240px;
  cursor: pointer;
}

.done-text {
  font-family: var(--serif);
  font-size: 19px;
  line-height: 2;
  color: var(--ink);
}

.current-line {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.9;
  margin-top: 14px;
}

.chunk-old { color: var(--ink); }

.chunk-now {
  background: linear-gradient(transparent 55%, var(--marker) 55%);
  border-radius: 3px;
  animation: pop .28s ease-out;
}

.chunk-emoji {
  display: inline-block;
  font-size: 26px;
  margin-left: 6px;
  vertical-align: -3px;
  animation: pop .28s ease-out;
}

@keyframes pop {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.w { cursor: pointer; border-radius: 3px; }
.w:hover { background: var(--accent-soft); }

.read-controls { margin-top: 16px; }
.read-controls .hint { margin-bottom: 4px; }

.after-read { margin-top: 6px; }

.audio-row { display: flex; gap: 10px; margin-top: 10px; }

.btn-audio {
  flex: 1;
  padding: 12px;
  background: var(--card);
  border: 1.5px solid var(--accent);
  color: var(--accent);
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
}
.btn-audio:disabled { opacity: .5; }
.btn-audio.playing { background: var(--accent); color: #fff; }

.tap-tip {
  text-align: center;
  font-size: 12px;
  color: var(--sub);
  margin-top: 14px;
}

/* ---------- たしかめ ---------- */

.quiz-progress { font-size: 13px; color: var(--sub); text-align: center; margin: 6px 0 12px; }

.quiz-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px 22px;
}

.quiz-q {
  font-family: var(--serif);
  font-size: 20px;
  line-height: 1.7;
  margin-bottom: 18px;
}

.quiz-choices { display: grid; gap: 10px; }

.choice {
  padding: 13px 16px;
  background: var(--paper);
  border: 1.5px solid var(--line);
  border-radius: 12px;
  font-family: var(--serif);
  font-size: 17px;
  text-align: left;
  cursor: pointer;
  transition: all .12s;
}
.choice:not(:disabled):hover { border-color: var(--accent); }
.choice.correct { background: var(--accent-soft); border-color: var(--accent); font-weight: 700; }
.choice.wrong { background: #f6e4de; border-color: var(--bad); color: var(--bad); }
.choice:disabled { cursor: default; }

.quiz-feedback {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

.fb-mark { font-size: 16px; font-weight: 700; }
.fb-mark.good { color: var(--accent); }
.fb-mark.bad { color: var(--bad); }
.fb-why { font-family: var(--serif); font-size: 15px; color: #4d483d; margin-top: 2px; }

/* ---------- 結果 ---------- */

.result-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 30px 22px;
  text-align: center;
}

.result-score { font-size: 40px; font-weight: 700; font-family: var(--serif); }
.result-score small { font-size: 18px; color: var(--sub); }
.result-label { font-size: 13px; color: var(--sub); margin-top: 6px; }

.cheer-box {
  display: flex;
  gap: 12px;
  align-items: center;
  text-align: left;
  background: var(--paper);
  border-radius: 12px;
  padding: 14px 16px;
  margin-top: 18px;
}
.cheer { font-family: var(--serif); font-size: 16px; }

.streak { margin-top: 14px; font-size: 13px; color: var(--sub); }
.streak b { color: var(--accent); }

/* ---------- 上限 ---------- */

.limit-card {
  text-align: center;
  padding: 50px 20px;
}
.limit-title { font-size: 20px; font-weight: 700; margin-top: 20px; }
.limit-body { font-size: 14px; color: var(--sub); margin-top: 10px; }

/* ---------- 単語シート ---------- */

.sheet-back {
  position: fixed;
  inset: 0;
  background: rgba(41, 38, 31, .25);
  z-index: 10;
}

.word-sheet {
  position: fixed;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 100%;
  max-width: 640px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px 18px 0 0;
  padding: 18px 22px 22px;
  z-index: 11;
  animation: rise .22s ease-out;
  box-shadow: 0 -8px 30px rgba(41, 38, 31, .12);
}

@keyframes rise {
  from { transform: translateX(-50%) translateY(30px); opacity: 0; }
  to { transform: translateX(-50%) translateY(0); opacity: 1; }
}

.ws-head { display: flex; align-items: center; gap: 10px; }
.ws-word { font-family: var(--serif); font-size: 26px; font-weight: 700; }
.ws-play {
  background: none; border: none; font-size: 20px; cursor: pointer;
  padding: 4px;
}
.ws-close {
  margin-left: auto;
  background: none; border: none;
  font-size: 26px; color: var(--sub);
  cursor: pointer; line-height: 1;
}

.ws-body { display: flex; align-items: center; gap: 14px; margin-top: 10px; }
.ws-emoji { font-size: 40px; }
.ws-def { font-family: var(--serif); font-size: 19px; line-height: 1.5; }
.ws-def.loading { color: var(--sub); font-size: 15px; }

.ws-from { font-size: 11px; color: var(--sub); margin-top: 12px; text-align: right; }

@media (max-width: 480px) {
  .done-text { font-size: 17px; }
  .current-line { font-size: 20px; }
  .ph-big { font-size: 19px; }
}