/* akusento pitch accent training prototype */
.train-page {
  --train-surface: var(--ink-soft);
  --train-surface-2: color-mix(in srgb, var(--ink-soft) 86%, var(--paper) 14%);
  --train-border: rgba(127, 127, 127, 0.24);
  --train-muted: var(--paper-dim);
  --train-good: #6bbf8a;
  --train-warn: #d9b451;
  --train-bad: #d96556;
  --train-radius: 4px;
}

.train-main {
  display: block !important;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 72px 0 88px;
}

.train-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(420px, 1.05fr);
  gap: 58px;
  align-items: end;
  margin-bottom: 36px;
}

.train-kicker,
.session-label {
  margin: 0 0 10px;
  color: var(--vermillion);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.train-hero h1 {
  max-width: 16ch;
  margin: 0;
  font-family: var(--en-font);
  font-size: clamp(2.6rem, 5vw, 4.9rem);
  font-weight: 600;
  line-height: 0.98;
  letter-spacing: 0;
  color: var(--paper);
}

.train-lead {
  margin: 0;
  color: var(--paper-dim);
  font-size: 1.08rem;
  font-weight: 300;
  line-height: 1.85;
}

.train-setup,
.train-session,
.question-card,
.breakdown-panel {
  background: var(--train-surface);
  border: 1px solid var(--train-border);
  border-radius: var(--train-radius);
  box-shadow: 0 18px 40px rgba(26, 20, 16, 0.1);
}

.train-setup {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(300px, 1fr) minmax(140px, auto);
  gap: 22px;
  align-items: center;
  padding: 22px;
}

.train-setup h2,
.session-topbar h2,
.breakdown-panel h3 {
  margin: 0;
  color: var(--paper);
  font-family: var(--en-font);
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: 0;
}

.train-setup p {
  margin: 8px 0 0;
  color: var(--paper-dim);
  font-size: 0.92rem;
  line-height: 1.65;
}

.difficulty-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.difficulty-button,
.train-secondary-button,
.mora-button {
  border-radius: var(--train-radius);
  font: inherit;
  cursor: pointer;
}

.difficulty-button {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 14px;
  border: 1px solid var(--train-border);
  background: color-mix(in srgb, var(--train-surface-2) 82%, transparent);
  color: var(--paper-dim);
  font-family: var(--en-font);
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  text-align: center;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.16s ease;
}

.difficulty-button.is-selected {
  border-color: var(--vermillion);
  color: var(--paper);
  background: color-mix(in srgb, var(--vermillion) 18%, var(--train-surface));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--vermillion) 42%, transparent);
}

.difficulty-button:hover {
  color: var(--paper);
  border-color: color-mix(in srgb, var(--vermillion) 65%, var(--train-border));
  transform: translateY(-1px);
}

.sentence-board.is-reviewing ~ .question-actions #submit-answer-button {
  display: none;
}

.train-primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 44px;
  padding: 0 18px;

  border: 1px solid color-mix(in srgb, var(--vermillion) 55%, var(--train-border));
  border-radius: var(--train-radius);

  background: rgba(217, 79, 56, 0.16);
  color: var(--paper);
  font-family: var(--en-font);
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1;
  cursor: pointer;

  box-shadow: none;

  transition:
    transform 0.16s ease,
    background 0.18s ease,
    border-color 0.18s ease,
    color 0.18s ease,
    box-shadow 0.18s ease,
    opacity 0.18s ease;
}


.train-primary-button:active:not(:disabled) {
  transform: translateY(0);
  background: color-mix(in srgb, var(--vermillion) 18%, transparent);
  box-shadow: none;
}

.train-primary-button:disabled {
  cursor: wait;
  opacity: 0.48;
  transform: none;
  box-shadow: none;
}

.train-primary-button:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--vermillion) 55%, transparent);
  outline-offset: 3px;
}

.train-button-icon {
  width: 1.05em;
  height: 1.05em;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.25;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.start-button .train-button-icon {
  fill: currentColor;
  stroke: none;
}

.train-secondary-button {
  min-height: 44px;
  border: 1px solid transparent;
  color: var(--paper);
  font-family: var(--en-font);
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: transform 0.16s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.train-primary-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 5px 10px rgba(217, 79, 56, 0.28);
}

.train-primary-button:active {
  transform: translateY(0);
}

.start-button {
  min-width: 138px;
  min-height: 54px;
}

.train-secondary-button {
  padding: 0 14px;
  border-color: var(--train-border);
  background: transparent;
  color: var(--paper-dim);
}

.train-secondary-button:hover {
  border-color: color-mix(in srgb, var(--vermillion) 60%, var(--train-border));
  color: var(--paper);
}

.train-error {
  grid-column: 1 / -1;
  min-height: 1.2em;
  color: var(--train-bad);
}

.train-session {
  display: grid;
  gap: 16px;
  padding: 18px;
}

.session-topbar {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
}

.session-actions,
.question-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.session-progress {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 6px 2px 2px;
}

.progress-track {
  height: 7px;
  overflow: hidden;
  background: color-mix(in srgb, var(--train-surface-2) 80%, transparent);
  border: 1px solid rgba(127, 127, 127, 0.16);
  border-radius: 999px;
}

.progress-bar {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--vermillion), color-mix(in srgb, var(--vermillion) 60%, #f4cf7a 40%));
  border-radius: inherit;
  transition: width 0.24s ease;
}

.session-progress strong {
  min-width: 4ch;
  color: var(--paper);
  font-family: var(--en-font);
  font-size: 0.86rem;
  font-weight: 500;
  text-align: right;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.stat-box {
  display: grid;
  gap: 5px;
  padding: 14px;
  border: 1px solid var(--train-border);
  background: var(--train-surface-2);
}

.stat-box span,
.wordtype-row span,
.empty-breakdown {
  color: var(--paper-dim);
  font-size: 0.78rem;
}

@media (max-width: 760px) {
  .wordtype-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .wordtype-meta {
    white-space: normal;
  }
}

.stat-box strong {
  color: var(--paper);
  font-family: var(--en-font);
  font-size: 1.45rem;
  font-weight: 500;
}

.question-card {
  padding: 22px;
}

.sentence-board {
  margin: 8px 0 22px;
  color: var(--paper);
  font-family: var(--jp-font);
  font-size: clamp(1.5rem, 2vw, 1.75rem);
  line-height: 2.6;
}

.plain-text-token {
  display: inline-block;
}

.train-ruby-word {
  display: inline-ruby;
  ruby-position: over;
  margin-right: 0.06em;
  padding: 0 0.02em;
}

.train-ruby-reading {
  font-size: 0.45em;
  line-height: 1;
  white-space: nowrap;
}

.mora-button {
  position: relative;
  min-width: 1.6em;
  height: 1.8em;
  margin: 0 0.03em;
  padding: 0 0.18em;
  border: 1px solid transparent;
  background: transparent;
  color: var(--paper-dim);
  font-family: var(--jp-font);
  font-size: 1em;
  line-height: 1;
}

.base-mora-button {
  min-width: 1.05em;
  height: 1.35em;
  color: var(--paper);
  font-size: 1em;
  vertical-align: baseline;
}

.ruby-mora-button {
  color: var(--paper-dim);
}

.is-answering .mora-button.is-selected {
  border-color: var(--vermillion);
}

.mora-button.is-expected::before, .mora-button.is-alternative-expected::before {
  content: "";
  position: absolute;
  right: 0.08em;
  top: 0.08em;
  width: 0.9em;
  height: 0.55em;
  pointer-events: none;

  background-image:
    linear-gradient(var(--vermillion), var(--vermillion)),
    linear-gradient(var(--vermillion), var(--vermillion));
  background-repeat: no-repeat;
  background-size: 80% 2px, 2px 40%;
  background-position: 100% 0, 100% 1px;
}

.mora-button.is-alternative-expected::after {
  content: "alt ↓";
  position: absolute;
  left: 50%;
  top: -1.25em;
  transform: translateX(-50%);
  color: var(--train-good);
  font-family: var(--en-font);
  font-size: .75em;
  line-height: 1;
  white-space: nowrap;
  pointer-events: none;
  font-weight: bold;
}

.mora-button.is-correct {
  border-color: var(--train-good);
  background: color-mix(in srgb, var(--train-good) 24%, transparent);
  color: var(--paper);
}

.mora-button.is-missed {
  border-color: var(--train-warn);
  background: color-mix(in srgb, var(--train-warn) 22%, transparent);
  color: var(--paper);
}

.mora-button.is-false-positive {
  border-color: var(--train-bad);
  background: color-mix(in srgb, var(--train-bad) 22%, transparent);
  color: var(--paper);
}

.mora-button.is-true-negative {
  opacity: 0.56;
}

.session-complete {
  margin: 0;
  color: var(--paper-dim);
  font-family: var(--en-font);
  font-size: 1rem;
  line-height: 1.7;
}

.question-actions {
  justify-content: flex-end;
  margin-top: 22px;
}

.feedback-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--train-border);
  color: var(--paper-dim);
}

.feedback-panel strong {
  color: var(--paper);
}

.feedback-panel .expected-answer {
  border-color: color-mix(in srgb, var(--train-warn) 65%, var(--train-border));
  color: var(--paper);
}

.feedback-panel span {
  padding: 5px 9px;
  border: 1px solid var(--train-border);
}

.summary-panel {
  display: grid;
  gap: 14px;
}

.summary-panel[hidden] {
  display: none;
}

.breakdown-panel {
  padding: 18px;
  background: var(--train-surface);
  border: 1px solid var(--train-border);
  border-radius: var(--train-radius);
}

.wordtype-breakdown {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.wordtype-row {
  display: grid;
  grid-template-columns: minmax(72px, 0.7fr) minmax(0, 1.6fr) auto;
  gap: 14px;
  align-items: center;
  padding: 12px 0;
  border-top: 1px solid rgba(127, 127, 127, 0.18);
}

.wordtype-meta {
  color: var(--paper-dim);
  font-size: 0.78rem;
  white-space: nowrap;
}

.wordtype-label {
  color: var(--paper);
}

.wordtype-failed-words {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-width: 0;
}


@media (max-width: 860px) {
  .train-main {
    padding-top: 42px;
  }

  .train-hero,
  .train-setup {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .session-topbar {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .difficulty-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .question-card {
    padding: 16px;
  }

  .mora-button {
    min-width: 1.45em;
  }

  .question-actions,
  .session-actions {
    width: 100%;
  }

  .question-actions > *,
  .session-actions > * {
    flex: 1;
  }
}

/* Parser-style review interactions */
.sentence-board.is-reviewing .train-word,
.failed-word-chip.train-word {
  cursor: pointer;
}

.sentence-board.is-answering .word.rules_applied {
  border-bottom: none !important;
  background-image: none !important;
}

.sentence-board.is-answering .word.Atamadaka:hover,
.sentence-board.is-answering .word.Heiban:hover,
.sentence-board.is-answering .word.Odaka:hover,
.sentence-board.is-answering .word.Kifuku:hover,
.sentence-board.is-answering .word.Nakadaka:hover {
  color: var(--paper) !important;
  font-weight: normal !important;
}

.sentence-board.is-reviewing .mora-button {
  color: inherit;
  opacity: 1;
}

.mora-button.is-alternative-expected:not(.is-selected):not(.is-correct):not(.is-false-positive) {
  border-color: color-mix(in srgb, var(--train-good) 45%, transparent);
  background: color-mix(in srgb, var(--train-good) 10%, transparent);
}

.accepted-answer-note code {
  color: var(--paper);
  font-family: var(--en-font);
  font-size: 0.92em;
}

.wordtype-list {
  display: grid;
  gap: 8px;
}

.failed-word-chip {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 3px 9px;
  border: 1px solid var(--train-border);
  border-radius: 999px;
  background: transparent;
  color: var(--paper);
  font: inherit;
  font-family: var(--jp-font);
  font-size: 0.95rem;
  line-height: 1;
  cursor: pointer;
}

.failed-word-chip:hover,
.failed-word-chip.rule-active {
  border-color: color-mix(in srgb, var(--vermillion) 62%, var(--train-border));
  background: color-mix(in srgb, var(--vermillion) 10%, transparent);
}

.failed-words-more-button:hover {
  color: var(--paper);
}

.failed-words-more-button {
  min-height: 28px;
  padding: 3px 8px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--paper-dim);
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
}

.train-session[hidden],
.summary-panel[hidden],
.feedback-panel[hidden],
#next-question-button[hidden] {
  display: none !important;
}

.feedback-word-chip {
  padding: 5px 9px;
  border: 1px solid var(--train-border);
  background: transparent;
  color: var(--paper);
  font: inherit;
  cursor: pointer;
  border-radius: 3px;
}

.feedback-word-chip.is-missed {
  border-color: color-mix(in srgb, var(--train-warn) 70%, var(--train-border));
}

.feedback-word-chip.is-wrong {
  border-color: color-mix(in srgb, var(--train-bad) 70%, var(--train-border));
}

.feedback-word-chip.is-accepted-alternative {
  border-color: color-mix(in srgb, #15a24c 70%, var(--train-border));
}

.wordtype-failed-words .failed-word-chip[hidden] {
  display: none !important;
}

.mora-button {
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

@media (pointer: coarse) {
  .sentence-board {
    line-height: 2.1;
  }

  .mora-button {
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
  }

  .base-mora-button {
    min-width: 32px;
    min-height: 36px;
    padding: 0.22em 0.42em;
  }

  .ruby-mora-button {
    min-width: auto;
    min-height: auto;
    padding: 0.05em 0.12em;
  }

  .train-ruby-reading {
    display: ruby-text;
  }

  .train-ruby-word {
    ruby-position: over;
  }
}

.sentence-board.is-answering .train-word {
  pointer-events: none;
}

.sentence-board.is-answering .mora-button {
  pointer-events: auto;
}