/* Learning shares the quiet blue-and-porcelain system in DESIGN.md. */
.workspace-tabs { display: flex; align-items: center; gap: 6px; min-width: 0; }
.workspace-tabs button { min-height: 46px; padding: 10px 18px; border: 1px solid transparent; border-radius: var(--radius-sm); background: transparent; color: var(--color-muted); font-size: 14px; font-weight: 500; white-space: nowrap; }
.workspace-tabs button:hover:not(:disabled) { color: var(--color-player); background: color-mix(in srgb, var(--color-surface) 65%, transparent); }
.workspace-tabs button[aria-selected=true] { color: var(--color-player); background: var(--color-surface); box-shadow: 0 1px 4px rgb(13 27 50 / 5%); font-weight: 600; }
.workspace-tabs button:disabled { opacity: .5; }
.learning-panel { min-width: 0; }
.learning-heading { align-items: center; gap: 18px; margin-bottom: 6px; }
.learning-heading h1 { flex: 0 0 auto; }
.learning-heading > p { flex: 1; margin: 0; padding: 0; color: var(--color-muted); font-size: 13px; line-height: 1.7; }
.learning-heading .learning-refresh { flex: 0 0 auto; }
.learning-panel h3 { font-size: 15px; font-weight: 600; margin: 0 0 8px; }
.learning-load { min-height: 34px; display: flex; align-items: center; gap: 14px; margin-bottom: 12px; color: var(--color-muted); font-size: 12px; line-height: 1.7; }
.learning-load[data-error=true] { color: var(--color-danger); }
.phoneme-workspace { display: grid; grid-template-columns: minmax(0,1fr) minmax(330px,1fr); align-items: start; gap: 24px; }
.phoneme-chart { padding: 24px; }
.phoneme-chart .card-heading { margin-bottom: 18px; }
.phoneme-chart .card-heading h2 { font-size: 17px; }
.learning-filter { margin-bottom: 20px; }
.learning-segments { display: flex; gap: 6px; flex-wrap: wrap; }
.learning-segments button { min-height: 44px; padding: 8px 12px; border: 1px solid var(--color-border); border-radius: 8px; color: var(--color-muted); background: var(--color-surface); font-size: 13px; }
.learning-segments button:hover:not(:disabled) { border-color: var(--color-muted); color: var(--color-ink); }
.learning-segments button[aria-pressed=true] { border-color: var(--color-player); color: var(--color-player); background: var(--color-background); }
.phoneme-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 8px; }
.phoneme-tile { min-width: 0; min-height: 78px; padding: 10px 4px 8px; display: flex; flex-direction: column; align-items: center; gap: 4px; border: 1px solid color-mix(in srgb, var(--color-border) 65%, var(--color-surface)); border-radius: var(--radius-sm); background: var(--color-surface); }
.phoneme-tile:hover:not(:disabled) { border-color: var(--color-primary); color: var(--color-player); background: var(--color-background); }
.phoneme-tile[aria-pressed=true] { background: var(--color-player); color: var(--color-surface); border-color: var(--color-player); }
.phoneme-tile .tile-symbol { font: 27px/1.2 "Times New Roman", "Noto Serif", serif; }
.phoneme-tile .tile-example { font-size: 11px; opacity: .85; overflow-wrap: anywhere; }
.phoneme-tile .tile-mastery { min-height: 12px; font-size: 10px; line-height: 1.2; }
.phoneme-detail { overflow: clip; }
.phoneme-hero { text-align: center; padding: 24px 24px 0; color: var(--color-player); }
.phoneme-hero h2.ipa-symbol { font: 72px/1.3 "Times New Roman", "Noto Serif", serif; margin: 8px 0; letter-spacing: -.025em; }
#phonemeName { min-height: 22px; font-size: 13px; color: var(--color-muted); }
.learning-listen { width: 100%; margin-top: 16px; background: var(--color-primary); color: var(--color-surface); }
.learning-listen:hover:not(:disabled) { background: var(--color-player); }
.learning-listen:disabled { opacity: .46; }
.phoneme-audio-note { min-height: 42px; margin-top: 14px; color: var(--color-muted); font-size: 12px; line-height: 1.8; text-align: left; }
.phoneme-guide { padding: 18px 24px 24px; }
.phoneme-guide > p { font-size: 14px; line-height: 1.9; margin-bottom: 18px; }
.learning-examples { display: flex; gap: 8px; flex-wrap: wrap; }
.learning-example { min-height: 44px; padding: 9px 12px; border: 1px solid var(--color-border); border-radius: 8px; background: var(--color-surface); font-size: 14px; }
button.learning-example:hover:not(:disabled) { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-background); }
.learning-selfcheck { margin-top: 18px; padding-top: 16px; border-top: 1px solid color-mix(in srgb, var(--color-border) 65%, var(--color-surface)); }
.learning-selfcheck > p { min-height: 40px; margin-bottom: 12px; color: var(--color-muted); font-size: 12px; line-height: 1.8; }
.review-actions { display: flex; gap: 9px; }
.review-actions .button { flex: 1; min-width: 0; padding-inline: 10px; }
.learning-feedback { min-height: 32px; margin-top: 14px; color: var(--color-muted); font-size: 13px; line-height: 1.8; }
.learning-feedback[data-error=true] { color: var(--color-danger); }
.learning-help { margin-top: 18px; color: var(--color-muted); font-size: 13px; line-height: 1.8; }
.learning-help summary { display: list-item; width: fit-content; min-height: 44px; padding: 10px 0; cursor: pointer; }
.learning-help summary:hover { color: var(--color-primary); }
.learning-help summary:focus-visible { outline: 3px solid var(--focus-ring); outline-offset: 3px; border-radius: 4px; }
.learning-help > p { margin: 6px 0 12px; }
.word-toolbar { display: grid; grid-template-columns: minmax(125px,.8fr) minmax(125px,.8fr) minmax(0,1.5fr); gap: 14px; padding: 0; margin-bottom: 22px; background: transparent; border: 0; }
.word-toolbar label { font-size: 13px; color: var(--color-muted); font-weight: 500; }
.learning-search { position: relative; min-width: 0; }
.learning-search input { padding-right: 76px; }
.learning-search button { position: absolute; top: 2px; right: 10px; }
.word-study { display: block; width: 100%; max-width: 760px; margin: 0 auto; }
.word-card { padding: 24px 30px 12px; }
.word-topline { display: flex; justify-content: space-between; align-items: center; gap: 15px; min-height: 24px; }
.word-prompt { padding: 24px 0; text-align: center; }
.word-prompt h2 { font: 52px/1.35 "Times New Roman", "Noto Serif", serif; overflow-wrap: anywhere; letter-spacing: -.025em; }
.word-ipa { font: 20px/1.8 "Times New Roman", "Noto Serif", serif; color: var(--color-muted); margin: 4px 0 16px; }
.word-prompt .eyebrow { margin-bottom: 6px; font: 12px/1.7 var(--font-sans); letter-spacing: 0; }
.word-prompt .button { min-width: 140px; }
.word-reveal { width: 100%; margin: 0 0 20px; }
.word-answer { border-top: 1px solid color-mix(in srgb, var(--color-border) 65%, var(--color-surface)); padding-top: 20px; margin-bottom: 20px; }
.word-answer > p { font-size: 15px; line-height: 1.9; }
.word-answer > p.word-meaning { font-size: 23px; font-weight: 600; margin-bottom: 12px; }
.word-answer > p.field-hint { font-size: 12px; margin-top: 16px; }
.word-answer .review-actions { margin-top: 18px; }
.word-navigation { display: flex; gap: 12px; justify-content: space-between; align-items: center; border-top: 1px solid color-mix(in srgb, var(--color-border) 65%, var(--color-surface)); padding-top: 8px; }
.word-navigation .text-button { white-space: normal; text-align: center; color: var(--color-muted); }
.word-navigation .text-button:hover:not(:disabled) { color: var(--color-primary); }
.word-notes { padding: 0 4px; }
.word-notes p { color: var(--color-muted); font-size: 13px; line-height: 1.9; margin-bottom: 12px; }
.word-notes p.field-hint { font-size: 12px; }
.learning-empty { max-width: 760px; margin: 0 auto; padding: 44px 24px; text-align: center; }
.learning-empty > span { display: block; font-size: 28px; color: var(--color-success); margin-bottom: 12px; }
.learning-empty h2 { font-size: 21px; margin-bottom: 10px; }
.learning-empty p { color: var(--color-muted); margin-bottom: 22px; font-size: 14px; }
.learning-audio-bar { display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; margin: 10px 0 22px; padding: 14px 20px; border: 1px solid var(--color-border); border-radius: var(--radius-default); background: var(--color-surface); }
.learning-audio-bar > div { flex: 1; min-width: 150px; }
.learning-audio-bar audio { width: min(100%,330px); height: 44px; }
#learningAudioLabel { font-size: 14px; font-weight: 600; }
#learningAudioStatus { min-height: 21px; color: var(--color-muted); font-size: 12px; line-height: 1.7; }
@media (min-width: 1120px) { .phoneme-grid { grid-template-columns: repeat(5,minmax(0,1fr)); } }
@media (max-width: 900px) {
  .phoneme-workspace { grid-template-columns: 1fr; }
  .phoneme-grid { grid-template-columns: repeat(6,minmax(0,1fr)); }
  .phoneme-detail { display: grid; grid-template-columns: minmax(0,.85fr) minmax(0,1.15fr); }
  .phoneme-hero { align-self: start; padding-bottom: 24px; }
  .phoneme-guide { padding-top: 24px; }
  .word-card { padding-inline: 26px; }
}
@media (max-width: 600px) {
  .workspace-tabs { gap: 4px; width: 100%; }
  .workspace-tabs button { flex: 1; min-height: 44px; padding-inline: 8px; font-size: 14px; }
  .learning-heading { flex-wrap: wrap; gap: 2px 12px; }
  .learning-heading h1 { flex: 1; }
  .learning-heading > p { flex-basis: 100%; order: 3; font-size: 12px; }
  .learning-heading .learning-refresh { min-height: 44px; font-size: 13px; }
  .learning-load { min-height: 32px; margin-bottom: 10px; }
  .phoneme-chart { padding: 20px 16px; }
  .phoneme-grid { grid-template-columns: repeat(4,minmax(0,1fr)); gap: 7px; }
  .phoneme-tile { min-height: 76px; }
  .learning-segments { gap: 5px; }
  .learning-segments button { padding-inline: 9px; font-size: 12px; }
  .phoneme-detail { display: block; }
  .phoneme-hero { padding: 22px 20px 0; }
  .phoneme-guide { padding: 18px 20px 22px; }
  .word-toolbar { grid-template-columns: 1fr 1fr; gap: 14px 12px; margin-bottom: 18px; }
  .word-search-field { grid-column: 1/-1; }
  .word-card { padding: 20px 20px 10px; }
  .word-prompt { padding: 22px 0; }
  .word-prompt h2 { font-size: 46px; }
  .review-actions .button { font-size: 13px; padding-inline: 7px; }
  .word-navigation .small-label { display: none; }
  .learning-audio-bar { padding: 14px 16px; gap: 8px; }
  .learning-audio-bar audio { order: 3; width: 100%; }
}
@media (forced-colors: active) {
  .workspace-tabs button[aria-selected=true], .phoneme-tile[aria-pressed=true], .learning-segments button[aria-pressed=true] { outline: 2px solid Highlight; }
}