.riichi-trainer [hidden] { display: none !important; }
.riichi-back { display: inline-block; margin-bottom: .75rem; font-size: .9rem; }
.riichi-trainer .page-header p { margin-bottom: 0; }
.riichi-box { min-width: 0; margin: 1.2rem 0; padding: 1.1rem; border: 1px solid var(--pink-dim); background: #090507; }
.riichi-box h2 { margin: 0 0 .8rem; font-size: 1.4rem; }
.riichi-box h3 { margin: 1rem 0 .5rem; }
.riichi-switches { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .5rem .6rem; margin-left: auto; font-size: .85rem; }
.riichi-switch { display: inline-flex; align-items: center; gap: .4rem; cursor: pointer; position: relative; white-space: nowrap; }
.riichi-switch input { position: absolute; opacity: 0; width: 40px; height: 24px; margin: 0; }
.riichi-switch-track { width: 38px; height: 22px; border: 1px solid var(--pink-dim); border-radius: 12px; background: #21121a; transition: background .15s; }
.riichi-switch-track::after { content: ""; display: block; width: 14px; height: 14px; margin: 3px; border-radius: 50%; background: var(--pink-dim); transition: transform .15s; }
.riichi-switch input:checked + .riichi-switch-track { background: var(--pink); border-color: var(--pink); }
.riichi-switch input:checked + .riichi-switch-track::after { transform: translateX(16px); background: #130a0e; }
.riichi-switch input:focus-visible + .riichi-switch-track { outline: 2px dashed #ffc0cf; outline-offset: 4px; }
.riichi-note { font-size: .83rem; line-height: 1.5; color: #c68e9c; }
.riichi-heading-row { display: flex; align-items: baseline; justify-content: space-between; gap: .7rem; flex-wrap: wrap; }
.riichi-answer-heading { align-items: center; gap: .6rem 1rem; margin-bottom: .8rem; }
.riichi-answer-title { display: flex; flex: 1 1 20rem; flex-wrap: wrap; align-items: baseline; gap: .3rem 1rem; }
.riichi-answer-heading h2 { margin-bottom: 0; }
.riichi-context { display: flex; flex-wrap: wrap; gap: .4rem; margin: .4rem 0 1rem; }
.riichi-context > span { display: inline-block; padding: .15rem .5rem; background: #211119; border: 1px solid var(--pink-shadow); font-size: .85rem; }
.riichi-tile-area { display: flex; align-items: flex-start; flex-wrap: wrap; gap: .8rem 1.1rem; padding-bottom: .6rem; }
.riichi-concealed { min-width: 0; flex: 1 1 340px; }
.riichi-tile-area h3, .riichi-indicators h3, .riichi-meld h3 { margin: 0 0 .45rem; font-size: .8rem; font-weight: normal; color: #c68e9c; }
.riichi-tiles { display: flex; align-items: flex-end; flex-wrap: wrap; gap: 2px; }
.riichi-tile { display: inline-block; flex: 0 0 auto; width: 35px; height: 47px; vertical-align: bottom; filter: drop-shadow(0 2px 1px #0008); }
.riichi-winning .riichi-tile { outline: 1px solid var(--pink); outline-offset: 3px; border-radius: 4px; }
.riichi-small-tiles .riichi-tile { width: 29px; height: 39px; }
.riichi-melds { display: flex; flex-wrap: wrap; gap: .8rem 1.2rem; margin: .6rem 0; }
.riichi-meld .riichi-sideways { transform: rotate(-90deg) translateX(-6px); }
.riichi-meld .riichi-tile-slot { display: inline-flex; align-items: flex-end; justify-content: center; width: 47px; height: 47px; }
.riichi-indicators { display: flex; flex-wrap: wrap; align-items: flex-start; gap: 1rem 2.5rem; border-top: 1px solid var(--pink-shadow); margin-top: .8rem; padding-top: .8rem; }
.riichi-dora-indicators { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem 2rem; width: 338px; max-width: 100%; flex: 0 0 auto; }
/* Five fixed slots cover the initial indicator and all four kan indicators. */
.riichi-dora-indicators .riichi-tiles { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); min-height: 39px; }
.riichi-dora-indicators .riichi-tile { width: 100%; height: auto; aspect-ratio: 3 / 4; }
.riichi-winds { display: grid; grid-template-columns: 6.5rem max-content; gap: 1.5rem; padding-left: 1.4rem; border-left: 1px solid var(--pink-shadow); margin-left: auto; }
.riichi-winds h3 { text-align: right; }
.riichi-winds .riichi-tiles { justify-content: flex-end; }
.riichi-hand-box > .riichi-note { margin: .7rem 0 0; }
.riichi-round-note { border-top: 1px solid var(--pink-shadow); padding-top: .6rem; }
.riichi-answer-fields { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: .8rem; }
.riichi-answer-field { display: flex; flex-direction: column; gap: .3rem; font-size: .9rem; }
.riichi-answer-field input { width: 100%; min-height: 43px; padding: .45rem .6rem; border: 1px solid var(--pink-dim); border-radius: 0; background: #000; color: #ffe1e9; font: inherit; font-variant-numeric: tabular-nums; }
.riichi-answer-field input[readonly] { border-style: dashed; color: #c68e9c; background: #130c0f; }
.riichi-answer-field input[aria-invalid="true"] { border: 2px solid #f2b28e; }
.riichi-answer-field .riichi-input-correct { border: 2px solid #9bcab4; }
.riichi-field-result { min-height: 1.2em; font-size: .8rem; color: #f2c9b2; }
.riichi-actions { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: .85rem; }
.riichi-trainer button { padding: .55rem .75rem; min-height: 42px; border: 1px solid var(--pink); border-radius: 0; background: var(--pink); color: #090305; font: bold .9rem Georgia,serif; cursor: pointer; }
.riichi-trainer button.riichi-secondary { background: #10090d; color: var(--pink-bright); }
.riichi-trainer button:hover { background: #f0a9bb; color: #090305; }
.riichi-trainer button:disabled { opacity: .5; cursor: default; }
.riichi-trainer :is(button,summary):focus-visible { outline: 2px dashed #ffc0cf; outline-offset: 4px; }
.riichi-answer-field input:focus { outline: none; border-color: #c18496; box-shadow: 0 0 0 1px rgb(210 115 138 / 15%); }
.riichi-feedback { margin: .8rem 0 .3rem; color: #ffd3df; }
.riichi-feedback:empty { display: none; }
#practice-stats { margin-bottom: 0; }
.riichi-score-badge { display: inline-block; padding: .15rem .5rem; border: 1px solid var(--pink); white-space: nowrap; }
.riichi-result { margin: 0 0 .8rem; font-size: 1.05rem; color: #ffd3df; }
.riichi-breakdown { list-style: none; padding: 0; margin: 0; }
.riichi-breakdown li { display: grid; grid-template-columns: minmax(0,1fr) auto; column-gap: .8rem; padding: .65rem 0; border-top: 1px solid var(--pink-shadow); }
.riichi-breakdown li > span { white-space: nowrap; color: #ffd0db; }
.riichi-breakdown p { grid-column: 1 / -1; margin: .2rem 0 0; font-size: .88rem; color: #c68e9c; }
.riichi-trainer :is(details.riichi-box,details.riichi-hand-details) > summary { cursor: pointer; font-size: 1.06rem; color: var(--pink-bright); font-weight: bold; }
.riichi-trainer :is(details.riichi-box,details.riichi-hand-details)[open] > summary { border-bottom: 1px solid var(--pink-shadow); padding-bottom: .8rem; margin-bottom: 1rem; }
#hand-explanation { margin-top: 1rem; }
.riichi-hand-details { margin-top: .8rem; padding-top: .8rem; border-top: 1px solid var(--pink-shadow); }
.riichi-hand-details .riichi-score-badge { margin-left: .4rem; font-size: .85rem; }
.riichi-explanation p { margin: .7rem 0; }
.riichi-steps { padding-left: 1.4rem; }
.riichi-steps li { margin: .65rem 0; }
.riichi-reference-table { display: table; width: 100%; font-size: .82rem; }
.riichi-reference-table td, .riichi-reference-table th { padding: .45rem; }
.riichi-reference-table th { white-space: normal; }
.riichi-reference-table caption { text-align: left; font-weight: bold; color: var(--pink-bright); padding: .8rem 0 .5rem; }
.riichi-reference-table td:first-child { min-width: 95px; }
.riichi-example-row > td { padding: .7rem .65rem .9rem; background: #060305; }
.riichi-yaku-example { margin: 0; }
.riichi-example-hand { display: flex; flex-wrap: wrap; align-items: flex-end; gap: .35rem .6rem; margin: .1rem 0 .4rem; }
.riichi-example-group { display: flex; flex-direction: column; min-width: 0; }
.riichi-example-label { margin-bottom: .25rem; font-size: .7rem; color: #c68e9c; }
.riichi-example-tiles { display: flex; gap: 1px; }
.riichi-example-tile { position: relative; display: inline-block; flex: 0 0 28px; width: 28px; height: 51px; }
.riichi-yaku-example .riichi-tile { width: 28px; height: 37.33px; filter: none; }
.riichi-example-winning > .riichi-tile { outline: 1px solid var(--pink-dim); outline-offset: 1px; border-radius: 2px; }
.riichi-example-win { position: absolute; top: 40px; left: 0; width: 100%; text-align: center; font-size: 9px; line-height: 1; color: var(--pink-bright); }
.riichi-example-caption { margin: 0; color: #c68e9c; font-size: .79rem; line-height: 1.5; }
.riichi-example-indicator { padding-right: .6rem; border-right: 1px solid var(--pink-shadow); }
.riichi-example-meld .riichi-example-label { color: var(--pink-bright); }
.riichi-table-scroll { overflow-x: auto; }
.riichi-reference-group { margin: 1.2rem 0; }
.riichi-reference-group summary { cursor: pointer; color: var(--pink-bright); }
@media(max-width:620px) {
  .riichi-box { padding: .8rem; }
  .riichi-tile { width: 31px; height: 42px; }
  .riichi-meld .riichi-tile-slot { width: 42px; height: 42px; }
  .riichi-meld .riichi-sideways { transform: rotate(-90deg) translateX(-5.5px); }
  .riichi-concealed { flex-basis: 100%; }
  .riichi-dora-indicators { width: 322px; column-gap: 1rem; }
  .riichi-winds { padding-left: 0; border-left: 0; }
  .riichi-answer-fields { gap: .7rem .5rem; }
  .riichi-reference-table { font-size: .76rem; }
  .riichi-reference-table td, .riichi-reference-table th { padding: .35rem; }
  .riichi-reference-table td:first-child { min-width: 75px; }
}
@media(prefers-reduced-motion:reduce) {
  .riichi-switch-track, .riichi-switch-track::after { transition: none; }
}