@import url('https://fonts.googleapis.com/css2?family=Zen+Kaku+Gothic+New:wght@400;500;700;900&family=Noto+Sans+JP:wght@400;500;700&display=swap');

/* LicenceHub Stream — 実機アプリ画面の再現（3問お試し体験） */

.stream {
  --bg: #F3EFE8;            /* 温かいクリーム背景 */
  --bg-elevated: #FFFFFF;   /* 選択肢・パネルの白 */
  --text: #1C1B19;
  --text-sub: #5B584F;
  --text-muted: #9C988D;
  --border: #E7E2D8;
  --border-soft: #EFEBE2;
  --shadow-card: 0 1px 2px rgba(28,27,25,0.05), 0 6px 18px rgba(28,27,25,0.05);
  --accent: #1F9E8F;
  --accent-dim: color-mix(in srgb, var(--accent) 10%, white);
  --correct: #1F9E8F;
  --wrong: #E2604B;
  --radius: 16px;
  --tabbar-h: 64px;
  --font-display: 'Zen Kaku Gothic New', 'Noto Sans JP', sans-serif;
  --font-body: 'Noto Sans JP', sans-serif;

  position: fixed;
  inset: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

.stream button {
  font-family: inherit;
  border: none;
  cursor: pointer;
  color: inherit;
}

/* ============ Header（章タイトル + 定着% + プログレスバー） ============ */
.stream-header {
  position: relative;
  z-index: 10;
  flex-shrink: 0;
  display: grid;
  grid-template-columns: 40px 1fr 40px;
  align-items: center;
  column-gap: 8px;
  padding: 10px 12px 0;
  background: rgba(243, 239, 232, 0.92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border-soft);
}

.stream-header__back,
.stream-header__app {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--text-sub);
  text-decoration: none;
  transition: background 180ms ease;
}
.stream-header__back:hover,
.stream-header__app:hover { background: rgba(0,0,0,0.04); }
.stream-header__app img { display: block; opacity: 0.9; }

.stream-header__center {
  text-align: center;
  min-width: 0;
}
.stream-header__chapter {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-sub);
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.stream-header__mastery {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.02em;
  margin-top: 1px;
}

.stream-header__bar {
  grid-column: 1 / -1;
  height: 3px;
  border-radius: 2px;
  background: var(--border);
  overflow: hidden;
  margin: 8px 0 0;
}
.stream-header__bar-fill {
  height: 100%;
  border-radius: 2px;
  background: var(--accent);
  transition: width 420ms cubic-bezier(.2,.7,.2,1);
}

/* ============ Viewport ============ */
.stream-viewport {
  flex: 1;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 22px 20px calc(24px + var(--tabbar-h));
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* ============ Question（背景直置き・カードなし） ============ */
.qcard {
  width: 100%;
  max-width: 460px;
  display: flex;
  flex-direction: column;
}

.qcard--question { background: none; }

.quiz__label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.quiz__section {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
}
.quiz__badge {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 45%, white);
  background: var(--accent-dim);
  border-radius: 5px;
  padding: 1px 7px;
}

.quiz__prompt {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.7;
  color: var(--text);
  letter-spacing: 0.01em;
  margin-bottom: 26px;
}

/* ---- choices（中央寄せの白カード・索引なし） ---- */
.choices {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.stream .choice {
  width: 100%;
  text-align: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 17px 18px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--text);
  box-shadow: var(--shadow-card);
  transition: transform 150ms ease, border-color 150ms ease, box-shadow 150ms ease;
}
.choice:hover {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
  transform: translateY(-2px);
  box-shadow: 0 2px 4px rgba(28,27,25,0.06), 0 10px 24px rgba(28,27,25,0.07);
}
.choice:active { transform: translateY(0); }

.quiz__hint {
  margin-top: 20px;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}

/* ============ 解説（回答後）= 質問＋色分け選択肢＋解説ボックス ============ */
/* 結果バッジ（正解=緑 / 不正解=赤） */
.quiz__badge--correct {
  color: var(--correct);
  border-color: color-mix(in srgb, var(--correct) 45%, white);
  background: color-mix(in srgb, var(--correct) 10%, white);
}
.quiz__badge--wrong {
  color: var(--wrong);
  border-color: color-mix(in srgb, var(--wrong) 45%, white);
  background: color-mix(in srgb, var(--wrong) 10%, white);
}

/* 結果状態の選択肢（タップ不可・色分け） */
.stream .choice--result {
  position: relative;
  cursor: default;
  display: flex;
  align-items: center;
  justify-content: center;
}
.stream .choice--result:hover {
  transform: none;
  border-color: var(--border-soft);
  box-shadow: var(--shadow-card);
}
.stream .choice--correct {
  border-color: var(--correct);
  background: color-mix(in srgb, var(--correct) 10%, white);
  font-weight: 700;
}
.stream .choice--wrong {
  border-color: var(--wrong);
  background: color-mix(in srgb, var(--wrong) 8%, white);
}
.choice__mark {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 16px;
  font-weight: 800;
}
.choice__mark--correct { color: var(--correct); }
.choice__mark--wrong { color: var(--wrong); }

/* 解説ボックス */
.explanation {
  margin-top: 22px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-left: 3px solid var(--accent);
  border-radius: 12px;
  padding: 16px 18px;
}
.explanation__label {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 8px;
}
.explanation__text {
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-sub);
}

/* 解説状態の「次へ」ボタン余白 */
.qcard--question .feedback__next {
  margin-top: 22px;
}

/* ============ Feedback（旧・白パネル｜未使用） ============ */
.qcard--feedback {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 26px 22px;
}
.qcard--correct { border-color: color-mix(in srgb, var(--correct) 45%, var(--border)); }
.qcard--wrong { border-color: color-mix(in srgb, var(--wrong) 35%, var(--border)); }

.feedback {
  display: flex;
  flex-direction: column;
  animation: fadeUp 280ms cubic-bezier(.2,.7,.2,1);
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.feedback__label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 800;
  margin-bottom: 18px;
}
.qcard--correct .feedback__label { color: var(--correct); }
.qcard--wrong .feedback__label { color: var(--wrong); }

.feedback__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 17px;
  color: white;
}
.qcard--correct .feedback__icon { background: var(--correct); }
.qcard--wrong .feedback__icon { background: var(--wrong); }

.feedback__answer {
  background: var(--bg);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 16px;
}
.feedback__answer-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}
.feedback__answer-text {
  font-size: 14.5px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--text);
}

.feedback__explanation {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-sub);
  margin-bottom: 24px;
}

.stream .feedback__next {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 15px 18px;
  background: var(--accent);
  color: white;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: 0 4px 14px color-mix(in srgb, var(--accent) 30%, transparent);
  transition: filter 150ms ease, transform 150ms ease;
}
.feedback__next:hover { filter: brightness(1.06); transform: translateY(-1px); }

.feedback__swipe-hint {
  margin-top: 10px;
  text-align: center;
  font-size: 11px;
  color: var(--text-muted);
}

/* ============ Result（CTA）カード ============ */
.system-card {
  width: 100%;
  max-width: 460px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 32px 24px 28px;
  display: flex;
  flex-direction: column;
  text-align: center;
  animation: scaleIn 360ms cubic-bezier(.2,.7,.2,1);
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.96) translateY(6px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.system-card__eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 8px;
}

.system-card__score {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 6px;
  margin-bottom: 8px;
  font-family: var(--font-display);
}
.system-card__score-num { font-size: 64px; font-weight: 900; color: var(--text); line-height: 1; }
.system-card__score-denom { font-size: 22px; font-weight: 700; color: var(--text-muted); }
.system-card__score-label { font-size: 13px; color: var(--text-muted); margin-left: 6px; }

.system-card__comment {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 24px;
  line-height: 1.7;
}

.system-card__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  border-radius: 12px;
  padding: 18px 12px;
  margin-bottom: 20px;
}
.system-card__meta-item { flex: 1; }
.system-card__meta-label { font-size: 11px; color: var(--text-muted); margin-bottom: 4px; letter-spacing: 0.04em; }
.system-card__meta-value { font-family: var(--font-display); font-size: 24px; font-weight: 800; color: var(--accent); }
.system-card__meta-value small { font-size: 12px; font-weight: 700; color: var(--text-sub); margin-left: 2px; }
.system-card__meta-divider { width: 1px; height: 36px; background: var(--border); }

.system-card__pitch {
  margin-bottom: 22px;
  text-align: left;
  background: linear-gradient(180deg, var(--accent-dim), transparent);
  border-radius: 12px;
  padding: 18px 18px 16px;
  border: 1px solid color-mix(in srgb, var(--accent) 15%, transparent);
}
.system-card__pitch-title { font-family: var(--font-display); font-weight: 700; font-size: 15px; color: var(--accent); margin-bottom: 8px; }
.system-card__pitch-text { font-size: 13px; line-height: 1.7; color: var(--text-sub); }

.system-card__cta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}
.cta-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 15px 18px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  background: #1C1B19;
  color: white;
  border: 1px solid #1C1B19;
  transition: filter 180ms ease, transform 150ms ease;
}
a.cta-btn--ios { cursor: pointer; }
a.cta-btn--ios:hover { filter: brightness(1.12); transform: translateY(-1px); }
.cta-btn--android {
  background: var(--bg-elevated);
  color: var(--text-muted);
  border-color: var(--border);
  cursor: not-allowed;
  opacity: 0.7;
}
.cta-btn__store { font-family: var(--font-display); font-weight: 700; font-size: 15px; }
.cta-btn__status {
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  background: rgba(255,255,255,0.18);
  border-radius: 5px;
}
.cta-btn--android .cta-btn__status { background: var(--bg); color: var(--text-muted); }

.system-card__note { font-size: 11px; color: var(--text-muted); margin-bottom: 20px; }

.system-card__sub {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.system-card__link, .system-card__retry {
  font-size: 13px;
  color: var(--text-sub);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 8px;
}
.system-card__link:hover, .system-card__retry:hover { color: var(--accent); }

/* ============ Bottom tab bar（学習 / 小説 / 記録 / 設定） ============ */
.stream-tabbar {
  position: relative;
  z-index: 10;
  flex-shrink: 0;
  height: var(--tabbar-h);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  padding-bottom: env(safe-area-inset-bottom, 0);
}
.tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  color: var(--text-muted);
  user-select: none;
}
.tab__label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.tab--active { color: var(--accent); }

/* ============ transitions ============ */
.slide-up-enter-active, .slide-up-leave-active {
  transition: transform 320ms cubic-bezier(.2,.7,.2,1), opacity 280ms ease;
}
.slide-up-enter-from { transform: translateY(40px); opacity: 0; }
.slide-up-leave-to { transform: translateY(-40px); opacity: 0; }

.fade-enter-active, .fade-leave-active { transition: opacity 200ms ease; }
.fade-enter-from, .fade-leave-to { opacity: 0; }

/* ============ responsive ============ */
@media (max-width: 480px) {
  .stream-viewport { padding: 18px 16px calc(20px + var(--tabbar-h)); }
  .quiz__prompt { font-size: 17.5px; line-height: 1.65; margin-bottom: 22px; }
  .choice { padding: 16px; }
  .qcard--feedback { padding: 22px 18px; }
  .system-card { padding: 28px 18px 24px; }
  .system-card__score-num { font-size: 56px; }
}

@media (prefers-reduced-motion: reduce) {
  .stream *, .stream *::before, .stream *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}