/* v1.1 study flow redesign
   quiz.html / result.html 専用。既存ロジックと他画面には影響させない。 */

.study-v11 {
  background:
    radial-gradient(circle at 50% -8%, rgba(37, 99, 235, 0.08), transparent 30rem),
    var(--bg);
}

.study-shell {
  padding-top: 0;
  padding-bottom: calc(3.5rem + env(safe-area-inset-bottom));
}

.study-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  margin: 0 -1rem 0.85rem;
  padding: calc(0.5rem + env(safe-area-inset-top)) 1rem 0.75rem;
  background: color-mix(in srgb, var(--bg) 94%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 78%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.study-topline {
  min-height: 44px;
  display: grid;
  grid-template-columns: 44px 1fr 44px;
  align-items: center;
}

.study-back {
  min-width: 44px;
  min-height: 44px;
  margin: 0;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  font-size: 1.7rem;
  line-height: 1;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.05);
}

.mini-brand {
  justify-self: center;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text);
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 800;
}

.mini-brand span {
  font-size: 1.3rem;
}

.topbar-spacer {
  width: 44px;
  height: 44px;
}

.study-title-row {
  margin-top: 0.45rem;
  align-items: center;
}

.study-title-row .mode-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.95rem;
}

.study-title-row .progress {
  font-size: 0.78rem;
}

.study-progress-track {
  height: 8px;
  margin-top: 0.55rem;
}

.study-session-score {
  margin-top: 0.45rem;
  text-align: right;
  font-size: 0.72rem;
}

.study-question-card {
  padding: 1rem;
  border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
  border-radius: 22px;
  box-shadow: 0 8px 26px rgba(15, 23, 42, 0.05);
}

.quiz-v11 .q-meta {
  margin-bottom: 0.9rem;
  gap: 0.4rem;
}

.quiz-v11 .badge {
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-size: 0.68rem;
}

.quiz-v11 .q-text {
  margin: 0.25rem 0 1.1rem;
  font-size: 1.02rem;
  line-height: 1.8;
  letter-spacing: 0.01em;
}

.quiz-v11 .choices {
  gap: 0.72rem;
}

.quiz-v11 .choice-btn {
  min-height: 58px;
  padding: 0.85rem;
  border-width: 1.5px;
  border-radius: 16px;
  background: var(--card);
  box-shadow: 0 3px 10px rgba(15, 23, 42, 0.03);
}

.quiz-v11 .choice-btn .kana {
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  margin-top: -0.05rem;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: color-mix(in srgb, var(--primary) 10%, var(--card));
  font-size: 0.78rem;
}

.quiz-v11 .choice-btn.correct .kana {
  background: color-mix(in srgb, var(--correct) 14%, var(--card));
  color: var(--correct);
}

.quiz-v11 .choice-btn.wrong .kana {
  background: color-mix(in srgb, var(--wrong) 14%, var(--card));
  color: var(--wrong);
}

.quiz-v11 .result-banner {
  margin: 1rem 0 0.75rem;
  padding: 0.8rem;
  border-radius: 16px;
  font-size: 1rem;
}

.quiz-v11 details.explanation {
  margin-bottom: 0.85rem;
  border-radius: 16px;
  background: color-mix(in srgb, var(--bg) 72%, var(--card));
}

.quiz-v11 details.explanation summary {
  padding: 0.85rem 0.9rem;
}

.quiz-v11 details.explanation .explanation-body {
  padding: 0 0.9rem 0.9rem;
}

.quiz-v11 .q-actions {
  gap: 0.45rem;
  margin-top: 0.9rem;
}

.quiz-v11 .q-actions button {
  min-width: calc(50% - 0.25rem);
  flex: 1 1 calc(50% - 0.25rem);
  padding: 0.55rem 0.45rem;
  border-width: 1px;
  border-radius: 12px;
  background: var(--bg);
  font-size: 0.72rem;
}

.quiz-v11 .q-actions button:last-child {
  flex-basis: 100%;
}

.quiz-v11 .feedback-box {
  padding: 0.85rem;
  border-radius: 14px;
  background: var(--bg);
}

.quiz-v11 .quiz-nav {
  position: sticky;
  bottom: calc(0.65rem + env(safe-area-inset-bottom));
  z-index: 10;
  margin: 1rem -0.1rem -0.1rem;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 17px;
  background: color-mix(in srgb, var(--card) 94%, transparent);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.14);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.quiz-v11 .quiz-nav .btn {
  min-height: 52px;
  border-radius: 13px;
}

.study-footer {
  margin-top: 2rem;
}

/* ---- result ---- */

.result-shell {
  padding-top: calc(0.9rem + env(safe-area-inset-top));
}

.study-result-header {
  margin-bottom: 1rem;
  text-align: center;
}

.study-result-header .mini-brand {
  margin-bottom: 0.6rem;
}

.study-result-header p {
  margin: 0;
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.study-result-header h1 {
  margin: 0.15rem 0 0;
  font-size: 1.35rem;
}

.result-score-card,
.result-section-card {
  border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
  border-radius: 22px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
}

.result-score-card {
  position: relative;
  overflow: hidden;
  padding: 1.25rem;
  text-align: center;
}

.result-score-card::before {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  left: 50%;
  top: -120px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  pointer-events: none;
}

.result-v11 .score-big {
  margin: 0.35rem 0 0.15rem;
  font-size: 3rem;
  line-height: 1;
  letter-spacing: -0.04em;
}

.result-v11 .score-big small {
  font-size: 0.95rem;
}

.result-v11 .score-rate {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  margin: 0.55rem auto 0;
  padding: 0 0.8rem;
  border-radius: 999px;
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 10%, var(--card));
  font-weight: 800;
}

.result-section-heading {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.7rem;
}

.result-section-heading h2 {
  margin: 0;
}

.result-section-icon {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 10%, var(--card));
  font-size: 0.78rem;
  font-weight: 900;
}

.result-v11 .stats-table th,
.result-v11 .stats-table td {
  padding-top: 0.55rem;
  padding-bottom: 0.55rem;
}

.result-v11 .answer-row {
  gap: 0.75rem;
  padding: 0.75rem 0;
  line-height: 1.6;
}

.result-v11 .answer-mark {
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 0.85rem;
}

.result-v11 .answer-mark.ok {
  background: var(--correct-bg);
}

.result-v11 .answer-mark.ng {
  background: var(--wrong-bg);
}

.result-actions {
  position: sticky;
  bottom: calc(0.65rem + env(safe-area-inset-bottom));
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 1rem 0 0;
  padding: 0.55rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: color-mix(in srgb, var(--card) 94%, transparent);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.16);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.result-actions .btn {
  min-height: 50px;
  border-radius: 13px;
}

@media (max-width: 360px) {
  .study-title-row .mode-name {
    max-width: 72%;
  }

  .quiz-v11 .q-actions button {
    flex-basis: 100%;
  }
}

@media (min-width: 700px) {
  .study-v11 .study-shell {
    max-width: 560px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .quiz-v11 .choice-btn,
  .quiz-v11 .quiz-nav,
  .result-actions {
    scroll-behavior: auto;
  }
}


/* ---- review page ---- */

.review-hero {
  margin: 0 -1rem 1rem;
  padding: calc(0.5rem + env(safe-area-inset-top)) 1rem 1rem;
  border-bottom-left-radius: 26px;
  border-bottom-right-radius: 26px;
  background: linear-gradient(160deg, var(--card), color-mix(in srgb, var(--review) 6%, var(--card)));
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

.review-kicker {
  margin: 0.8rem 0 0;
  color: var(--review);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.review-hero h1 {
  margin: 0.12rem 0 0;
  font-size: 1.35rem;
}

.review-hero > p:last-child {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.review-section {
  border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
  border-radius: 20px;
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.045);
}

.review-section-primary {
  border-color: color-mix(in srgb, var(--review) 28%, var(--border));
}

.review-section-heading {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.35rem;
}

.review-section-heading > div {
  min-width: 0;
}

.review-section-heading p {
  margin: 0;
  color: var(--review);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.review-section-heading h2 {
  margin: 0.05rem 0 0;
  font-size: 1rem;
}

.review-section-icon {
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--review);
  background: color-mix(in srgb, var(--review) 10%, var(--card));
  font-weight: 900;
}

.review-success-icon {
  color: var(--correct);
  background: var(--correct-bg);
}

.review-favorite-icon {
  color: var(--demo);
  background: var(--demo-bg);
}

.review-v11 .review-item {
  margin-top: 0.65rem;
  padding: 0.8rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg);
}

.review-v11 .review-item + .review-item {
  margin-top: 0.55rem;
}

.review-v11 .review-item .q-snippet {
  margin: 0.5rem 0;
  line-height: 1.6;
}

.review-v11 .item-actions .btn {
  border-radius: 11px;
}

.review-start-area {
  margin-top: 0.85rem;
}

.review-start-area .btn {
  min-height: 52px;
  border-radius: 14px;
}

/* ---- exam page ---- */

.exam-topbar {
  margin-bottom: 0.85rem;
}

.exam-start-card,
.exam-panel-card,
.exam-question-card {
  border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
  border-radius: 22px;
  box-shadow: 0 8px 26px rgba(15, 23, 42, 0.05);
}

.exam-start-hero {
  padding: 0.45rem 0 1rem;
  text-align: center;
}

.exam-start-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 0.55rem;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: color-mix(in srgb, var(--primary) 10%, var(--card));
  font-size: 1.7rem;
}

.exam-start-hero p {
  margin: 0;
  color: var(--primary);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.exam-start-hero h1 {
  margin: 0.12rem 0 0;
  font-size: 1.45rem;
}

.exam-start-hero > span:last-child {
  display: block;
  margin-top: 0.35rem;
  color: var(--muted);
  font-size: 0.78rem;
}

.exam-v11 #start-notice,
.exam-v11 #start-resume,
.exam-v11 #start-new,
.exam-v11 #start-history {
  margin-top: 0.9rem;
}

.exam-v11 #start-notice {
  padding: 0.9rem;
  border-radius: 15px;
  background: var(--bg);
}

.exam-v11 .exam-breakdown {
  margin: 0.55rem 0;
  padding: 0.65rem 0.75rem;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  line-height: 1.8;
  font-size: 0.78rem;
}

.exam-v11 #start-new h3,
.exam-v11 #start-history h3 {
  margin: 0 0 0.55rem;
  font-size: 0.9rem;
}

.exam-v11 .exam-mode-btn {
  min-height: 64px;
  padding: 0.8rem 0.9rem;
  border-radius: 15px;
}

.exam-v11 .exam-history {
  list-style: none;
  margin: 0;
  padding: 0;
}

.exam-v11 .exam-history-row {
  min-height: 64px;
  padding: 0.65rem 0;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.15rem 0.8rem;
  border-bottom: 1px solid var(--border);
}

.exam-v11 .exam-history-when,
.exam-v11 .exam-history-score,
.exam-v11 .exam-history-sub {
  font-size: 0.72rem;
}

.exam-v11 .exam-history-score {
  color: var(--primary);
  font-weight: 800;
}

.exam-v11 .exam-history-sub {
  grid-column: 1 / -1;
  color: var(--muted);
}

.exam-v11 .exam-choice {
  min-height: 58px;
  border-radius: 16px;
  border-width: 1.5px;
}

.exam-v11 .exam-choice .kana {
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: color-mix(in srgb, var(--primary) 10%, var(--card));
}

.exam-v11 .exam-choice.selected {
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary) 16%, transparent);
}

.exam-actions {
  margin-top: 0.9rem;
}

.exam-actions button {
  border-width: 1px;
  background: var(--bg);
}

.exam-bottom-actions {
  position: sticky;
  bottom: calc(0.65rem + env(safe-area-inset-bottom));
  z-index: 10;
  margin-top: 1rem;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 17px;
  background: color-mix(in srgb, var(--card) 94%, transparent);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.14);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.exam-bottom-actions .btn {
  min-height: 52px;
  border-radius: 13px;
}

.exam-finish-area {
  margin-top: 0.8rem;
}

.exam-finish-area .btn {
  font-size: 0.8rem;
}

.exam-list-actions {
  margin-top: 1rem;
}

.exam-list-actions .btn {
  min-height: 50px;
  border-radius: 13px;
}

.confirm-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 0.55rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--wrong);
  background: var(--wrong-bg);
  font-weight: 900;
}

#view-confirm {
  text-align: center;
}

#view-confirm #exam-confirm-body {
  text-align: left;
}

.exam-v11 .exam-grid-btn {
  border-radius: 12px;
}

/* ---- exam result ---- */

.result-mode-label {
  display: inline-block;
  margin-top: 0.35rem;
  color: var(--muted);
  font-size: 0.72rem;
}

.exam-score-card .exam-guide {
  margin-top: 0.9rem;
}

.exam-result-v11 .exam-tally {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem 0.7rem;
  margin: 0.8rem 0 0;
  padding: 0;
  list-style: none;
}

.exam-result-v11 .exam-details {
  margin-top: 0.75rem;
  border-top: 1px solid var(--border);
  padding-top: 0.6rem;
}

.exam-result-v11 .exam-details summary {
  min-height: 44px;
  display: flex;
  align-items: center;
  cursor: pointer;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 800;
}

.exam-result-v11 .exam-answer {
  margin-top: 0.55rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: var(--bg);
}

.exam-result-v11 .exam-answer summary {
  min-height: 52px;
  padding: 0.65rem 0.75rem;
}

.exam-result-v11 .exam-answer-body {
  background: var(--card);
}

.exam-result-actions {
  display: flex;
}


/* ===== v1.7 desktop study layout ===== */
@media (min-width: 900px) {
  .study-v11 {
    background:
      radial-gradient(circle at 14% 8%, rgba(107, 142, 78, 0.08), transparent 28rem),
      radial-gradient(circle at 88% 8%, rgba(37, 99, 235, 0.07), transparent 24rem),
      #f8f7f3;
  }

  .study-shell {
    max-width: 840px;
    padding-top: 1rem;
    padding-bottom: 4rem;
  }

  .study-topbar {
    position: static;
    margin: 0 0 1rem;
    padding: 0.85rem 1rem 1rem;
    border: 1px solid var(--border);
    border-radius: 22px;
    background: color-mix(in srgb, var(--card) 96%, transparent);
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .study-topline {
    grid-template-columns: 48px 1fr 48px;
  }

  .study-title-row {
    margin-top: 0.7rem;
  }

  .study-title-row .mode-name {
    font-size: 1.05rem;
  }

  .study-question-card {
    padding: 1.45rem 1.6rem;
    border-radius: 24px;
  }

  .quiz-v11 .q-text {
    font-size: 1.08rem;
    line-height: 1.9;
  }

  .quiz-v11 .choices {
    gap: 0.8rem;
  }

  .quiz-v11 .choice-btn {
    min-height: 64px;
    padding: 0.95rem 1rem;
    border-radius: 17px;
  }

  .quiz-v11 .choice-btn:hover:not(:disabled) {
    border-color: color-mix(in srgb, var(--primary) 45%, var(--border));
    box-shadow: 0 7px 18px rgba(15, 23, 42, 0.06);
  }

  .quiz-v11 .q-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .quiz-v11 .q-actions button,
  .quiz-v11 .q-actions button:last-child {
    min-width: 0;
    flex-basis: auto;
  }

  .quiz-v11 .quiz-nav {
    position: static;
    margin-top: 1.2rem;
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .quiz-v11 .quiz-nav .btn {
    min-height: 54px;
  }

  .result-shell {
    max-width: 900px;
    padding-top: 1.25rem;
  }

  .result-score-card,
  .result-section-card,
  .exam-start-card,
  .exam-question-card,
  .exam-panel-card {
    border-radius: 24px;
  }

  .exam-grid {
    grid-template-columns: repeat(auto-fill, minmax(52px, 1fr));
    gap: 0.5rem;
  }

  .exam-grid-btn {
    min-height: 50px;
  }

  .exam-start-card,
  .exam-panel-card {
    padding: 1.4rem 1.5rem;
  }

  .study-footer {
    margin-top: 2.5rem;
  }
}


/* ===== v1.8 result next actions ===== */
.result-next-card {
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid color-mix(in srgb, var(--primary) 18%, var(--border));
  border-radius: 22px;
  background: color-mix(in srgb, var(--primary) 3%, var(--card));
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
}

.result-next-lead {
  margin: -0.15rem 0 0.85rem;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.6;
}

.result-next-grid {
  display: grid;
  gap: 0.6rem;
}

.result-next-link {
  min-height: 76px;
  padding: 0.75rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 15px;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  text-decoration: none;
  background: var(--card);
  -webkit-tap-highlight-color: transparent;
}

.result-next-link:active {
  transform: scale(0.988);
}

.result-next-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 10%, var(--card));
  font-size: 0.9rem;
  font-weight: 900;
}

.result-next-link strong,
.result-next-link small {
  display: block;
}

.result-next-link strong {
  font-size: 0.86rem;
  line-height: 1.4;
}

.result-next-link small {
  margin-top: 0.1rem;
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.45;
}

.result-next-review {
  border-color: color-mix(in srgb, var(--review) 28%, var(--border));
}

.result-next-review .result-next-icon {
  color: var(--review);
  background: color-mix(in srgb, var(--review) 10%, var(--card));
}

@media (min-width: 900px) {
  .result-next-card {
    padding: 1.25rem;
  }

  .result-next-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.8rem;
  }

  .result-next-link {
    min-height: 118px;
    grid-template-columns: 1fr;
    align-content: start;
    padding: 1rem;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  }

  .result-next-link:hover {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--primary) 34%, var(--border));
    box-shadow: 0 9px 20px rgba(15, 23, 42, 0.06);
  }

  .result-next-icon {
    margin-bottom: 0.35rem;
  }
}