/*
 * kamishibai landing — page layout on top of butai.css.
 * The page behaves like one TUI session: sticky header chip,
 * quiet editorial sections, a live status bar at the bottom.
 */

/* ---- shell -------------------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}


.wrap {
  --wrap-pad: clamp(1.25rem, 4vw, 2.5rem);
  max-width: calc(var(--content-frame) + var(--wrap-pad) + var(--wrap-pad));
  margin: 0 auto;
  padding: 0 var(--wrap-pad);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--stage);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 1.25ch;
  min-height: 3rem;
}

.site-header .spacer {
  flex: 1;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5ch;
  font-family: var(--mono);
  font-size: var(--text-ui);
  margin-left: 1.5ch;
  white-space: nowrap;
}

.site-nav a {
  color: var(--ink-dim);
  text-decoration: none;
  padding: 0.35rem 0 0.4rem;
}

.site-nav a:hover {
  color: var(--paper);
}

.nav-separator {
  color: var(--ink-faint);
  line-height: 1;
  user-select: none;
}

.site-nav a.active {
  color: var(--paper);
  font-weight: 700;
}

@media (max-width: 700px) {
  .site-header .gh-link {
    display: none;
  }
  .site-nav {
    gap: 1.15ch;
  }
}

@media (max-width: 560px) {
  .site-nav {
    font-size: var(--text-ui);
    gap: 0.65ch;
    margin-left: 0;
  }
  .nav-label {
    font-size: 0;
  }
  .nav-label::after {
    content: attr(data-short);
    font-size: var(--text-ui);
  }
}

.language-actions {
  display: flex;
  align-items: stretch;
  flex: 0 0 auto;
  white-space: nowrap;
}

.lang-offer {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  block-size: 2.25rem;
  padding: 0 0.7rem;
  border: 1px solid var(--line);
  background: var(--stage);
  color: var(--paper);
  font-family: var(--mono);
  font-size: var(--text-ui);
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
}

.lang-offer[hidden] {
  display: none;
}

.lang-offer:hover,
.lang-offer:focus-visible {
  border-color: var(--paper);
  background: var(--paper);
  color: var(--stage);
  text-decoration: none;
}

.lang-offer:not([hidden]) + .lang-btn {
  border-left: 0;
}

.lang-btn {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  inline-size: 2.25rem;
  block-size: 2.25rem;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--stage);
  color: var(--paper);
  font-family: var(--mono);
  font-size: var(--text-ui);
  font-weight: 700;
}

.lang-btn:hover,
.lang-btn:focus-visible {
  border-color: var(--ink-dim);
  background: var(--stage-raised);
}

@media (max-width: 560px) {
  .site-header .wrap {
    --wrap-pad: 1rem;
    gap: 0.5ch;
  }
  .site-header .chip {
    display: none;
  }
  .site-header .spacer {
    display: none;
  }
  .language-actions {
    margin-inline-start: auto;
  }
  .lang-offer {
    font-size: var(--text-ui);
    padding-inline: 0.25rem;
  }
  .site-header .wrap:has(.lang-offer:not([hidden])) .site-nav {
    gap: 0.4ch;
  }
}

.gh-link {
  font-family: var(--mono);
  font-size: var(--text-ui);
  color: var(--ink-dim);
  text-decoration: none;
}

.gh-link:hover {
  color: var(--paper);
}

main {
  padding-bottom: 7rem;
}

section,
.site-footer {
  scroll-margin-top: 4.5rem;
}

section {
  padding-top: var(--section-gap);
}

/* ---- status bar (signature) --------------------------------------- */

.statusbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 55;
  background: var(--stage);
  border-top: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: var(--text-ui);
}

.statusbar .wrap {
  display: flex;
  align-items: center;
  gap: 1.5ch;
  min-height: 2.4rem;
  white-space: nowrap;
  overflow: hidden;
}

.statusbar .prompt {
  color: var(--ink-faint);
}

.statusbar code {
  color: var(--ink-dim);
  font-size: var(--text-ui);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.statusbar .btn {
  padding: 0.1em 0.8em;
  flex-shrink: 0;
}

.statusbar .spacer {
  flex: 1;
}

.statusbar {
  padding-bottom: env(safe-area-inset-bottom);
}

.ios-device .statusbar {
  display: none;
}

/* ---- stage figures: kamishibai cards illustrating text sections ------ */

.stage-figure {
  margin: 0;
  min-width: 0;
}

.stage-figure img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--stage-deep);
  filter: grayscale(1);
}

/* zigzag — thesis rows with a card figure on alternating sides */
.zigzag {
  list-style: none;
  display: grid;
  gap: clamp(2.75rem, 2.25rem + 1.5vw, 3.5rem);
}

.zigzag li {
  display: grid;
  gap: 2rem clamp(2rem, 4vw, 3.5rem);
  align-items: start;
}

.zigzag-copy {
  display: grid;
  row-gap: 0.6rem;
  align-content: start;
}

.zigzag-copy h3 {
  font-family: var(--mono);
  font-size: var(--text-body);
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.zigzag-copy p {
  color: var(--ink-dim);
  max-width: 53ch;
}

@media (min-width: 701px) {
  .zigzag li {
    grid-template-columns: minmax(10rem, 15rem) minmax(0, 1fr);
    column-gap: clamp(2.75rem, 5.5vw, 4.75rem);
  }
  .zigzag li:nth-child(even) {
    grid-template-columns: minmax(0, 1fr) minmax(10rem, 15rem);
  }
  .zigzag li:nth-child(even) .stage-figure {
    order: 1;
  }
}

@media (max-width: 700px) {
  .zigzag li {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 0.9rem 1rem;
  }
  .zigzag .stage-figure {
    width: clamp(9rem, 46vw, 13rem);
  }
  .zigzag-copy {
    display: contents;
  }
  .zigzag-copy h3 {
    align-self: end;
  }
  .zigzag-copy p {
    grid-column: 1 / -1;
    max-width: none;
  }
}

/* story finale — the trailing FAQ pointer, aligned with the editorial copy */
.story-finale {
  margin-top: 2.5rem;
  max-width: var(--measure);
}

.hero-install {
  margin-top: 2rem;
  max-width: var(--content-frame);
}

.install {
  margin-top: 2.5rem;
  max-width: var(--content-frame);
}

.install.install-launch {
  margin-top: 0.65rem;
}

.install-launch-label {
  margin-top: 1.5rem;
}

.install-cmd {
  display: flex;
  align-items: center;
  gap: 1.5ch;
  border: 1px solid var(--line);
  background: var(--stage-deep);
  padding: 0.9rem 1.1rem;
}

.install-cmd code {
  flex: 1;
  font-size: var(--text-ui);
  color: var(--paper);
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

.install-cmd code::-webkit-scrollbar {
  display: none;
}

.install-cmd .prompt {
  color: var(--ink-faint);
  user-select: none;
}

.install-or,
.install-launch-label {
  padding: 0.5rem 0 0.5rem 1.1rem;
  font-family: var(--mono);
  font-size: var(--text-ui);
  color: var(--ink-faint);
}

/* ---- terminal player ----------------------------------------------- */

.flow-main {
  display: grid;
  gap: 1rem;
  min-width: 0;
}

.flow-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  inline-size: 100%;
  max-inline-size: var(--content-frame);
  margin-inline: auto;
  container: term-flow / inline-size;
}

#flow .screen-title {
  margin-inline: auto;
}

.term {
  --term-guide-layout: panel;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--stage);
  font-family: var(--mono);
  font-size: 0.6875rem;
  line-height: 1.6;
  inline-size: 100%;
  min-width: 0;
  max-width: 100%;
}

.term-retry,
.matrix-retry {
  z-index: 2;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  color: var(--paper);
  background: var(--stage-deep);
  line-height: 1;
}

.term-retry {
  position: absolute;
  top: 50%;
  right: 0;
  width: 2.4em;
  height: 2.4em;
  padding: 0;
  transform: translateY(-50%);
  font-family: inherit;
  font-size: inherit;
  font-weight: 700;
}

.term-retry-icon {
  font-size: 1.4em;
  line-height: 1;
}

.matrix-retry {
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  width: 2.75rem;
  height: 2.75rem;
  font-size: 1.45rem;
}

.term-retry[hidden],
.matrix-retry[hidden] {
  display: none;
}

.term-retry:hover,
.matrix-retry:hover {
  background: var(--paper);
  color: var(--stage);
}

.term:focus-visible {
  outline: 2px solid var(--paper);
  outline-offset: 2px;
}

.term .m,
.term .chip {
  font-size: inherit;
}

.term-inner {
  position: relative;
  padding: 0.9rem 1.1rem;
  display: flex;
  flex-direction: column;
  overflow-x: auto;
}

.term-head,
.term-foot,
.term-view {
  min-width: 105ch;
}

.term-head {
  display: flex;
  align-items: baseline;
  gap: 2ch;
  padding-right: 0;
  white-space: nowrap;
  margin-bottom: 1em;
}

.term-head .spacer {
  flex: 1;
}

.term-corner {
  position: relative;
  flex: 0 0 7ch;
  inline-size: 7ch;
  block-size: 1.6em;
}

.term-head .pair {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: baseline;
  justify-content: flex-end;
  font-weight: 700;
}

.term.is-final .term-head .pair {
  visibility: hidden;
}

.term-view {
  position: relative;
  flex: 1;
}

.term-body {
  height: 30.4em;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: none;
}

.term-body::-webkit-scrollbar {
  display: none;
}

.term-screen {
  width: 105ch;
}

.term-screen .tl {
  white-space: pre;
  min-height: 1.6em;
}

.term-screen .tl.sel {
  background: var(--stage-raised);
}

.term .b {
  font-weight: 700;
}

.term .vbar {
  display: inline-block;
  transform: scaleY(1.6);
  transform-origin: center;
}

.term .d {
  color: var(--ink-dim);
}

.term .db {
  color: var(--ink-dim);
  font-weight: 700;
}

.term .f {
  color: var(--ink-faint);
}

.term .r {
  color: var(--line);
}

.term .u {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.term .cur {
  display: inline-block;
  width: 1ch;
  background: var(--paper);
  animation: blink 1.1s steps(1) infinite;
}

@keyframes blink {
  50% {
    background: transparent;
  }
}

.term.is-interactive .term-card-toggle {
  cursor: pointer;
}

.term.is-interactive .term-screen:has(.term-card-toggle:hover) .tl.sel {
  background: transparent;
}

.term.is-interactive .term-card-toggle:hover .tl {
  background: var(--stage-raised);
}

.term.is-interactive .fhint[data-act] {
  cursor: pointer;
}

.term-busy {
  position: absolute;
  z-index: 3;
  left: 50%;
  top: 44%;
  transform: translate(-50%, -50%);
  width: 50ch;
  border: 1px solid var(--ink-dim);
  background: var(--stage);
  padding: 1.6em 2ch;
}

.term-busy .busy-title {
  position: absolute;
  top: -0.85em;
  left: 2ch;
  background: var(--stage);
  padding: 0 1ch;
}

.term-busy .spin,
.term-screen .spin {
  display: inline-block;
  width: 1ch;
}

.term-foot {
  display: flex;
  align-items: baseline;
  gap: 2ch;
  white-space: nowrap;
  border-top: 1px dashed var(--line);
  margin-top: 0;
  padding-top: 0.55em;
}

.term-disclaimer {
  min-width: 105ch;
  min-height: 1.6em;
  margin: 1em 0 0;
  color: var(--ink-faint);
  line-height: 1.6;
  text-align: right;
  white-space: nowrap;
}

.term-foot-left {
  flex: 0 0 auto;
}

.term-foot-hints {
  display: flex;
  gap: 2ch;
  margin-left: auto;
}

.fhint.kflash,
.fhint.kflash span {
  background: var(--paper);
  color: var(--stage);
}

.term-tip {
  width: min(22rem, calc(100% - 2.2rem));
  min-width: 0;
  max-height: none;
  box-sizing: border-box;
  margin: 0 0 1rem 1.1rem;
  padding: 0.8rem 1rem;
  border: 1px solid var(--paper);
  border-radius: 0;
  background: var(--stage-deep);
  color: var(--paper);
  font-family: var(--mono);
  font-size: var(--text-ui);
  line-height: 1.55;
  white-space: normal;
  overflow-wrap: anywhere;
  opacity: 0;
  transform: translateY(0.35rem);
  transition: opacity 160ms linear, transform 160ms ease;
  pointer-events: none;
}

.term .term-tip,
.term .term-tip * {
  font-style: normal;
  font-weight: 400;
}

.term-tip[data-placement="overlay"] {
  position: absolute;
  z-index: 4;
  top: var(--term-tip-top);
  right: 1.1rem;
  width: min(22rem, calc(100% - 2.2rem));
  margin: 0;
}

.term-tip[data-placement="lower"] {
  position: absolute;
  z-index: 4;
  right: 1.1rem;
  bottom: var(--term-tip-bottom);
  width: min(22rem, calc(100% - 2.2rem));
  margin: 0;
}

.term-tip[data-placement="bottom"] {
  position: static;
  width: auto;
  max-width: none;
  margin: 0 1.1rem 1rem;
}

.term-tip.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.term-tip:empty {
  display: none;
}

@container term-flow (min-width: calc(45.5125rem + 2px)) {
  .term {
    --term-guide-layout: overlay;
  }
}

@media (prefers-reduced-motion: reduce) {
  .term-tip {
    transition: none;
  }
}

/* ---- flow link: the import step between terminal and phone ---- */

#card .wrap {
  container-type: inline-size;
}

.flow-link {
  display: grid;
  gap: 1.6em;
  justify-items: center;
  margin-bottom: 1.6em;
  padding-block-start: 1.6em;
  font-family: var(--mono);
  font-size: var(--text-body);
  line-height: 1.6;
}

.flow-link-arrow {
  display: grid;
  inline-size: 1ch;
  block-size: 1.6em;
  place-items: center;
  color: var(--ink-faint);
  font-size: inherit;
  line-height: inherit;
}

.flow-link-label {
  display: grid;
  inline-size: fit-content;
  min-inline-size: 18ch;
  max-inline-size: 100%;
  block-size: 3.2em;
  place-items: center;
  margin: 0;
  padding: 0 3ch;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-dim);
  line-height: inherit;
  text-align: center;
}

/* below ~730px the 105ch grid cannot fit at full size — shrink both the
   terminal and its Anki handoff by the same character-cell formula */
@supports (font-size: 1cqi) {
  .term {
    font-size: min(0.6875rem, calc((100cqi - 2.2rem - 2px) / 63));
  }
}

.flow-files {
  display: grid;
  gap: 1.6em;
  justify-items: center;
  padding-block-start: 1.6em;
  font-family: var(--mono);
  font-size: var(--text-body);
  line-height: 1.6;
}

.flow-files-box {
  display: grid;
  justify-items: center;
  row-gap: 1em;
  min-inline-size: 18ch;
  max-width: 100%;
  padding: 1em 3ch 1.1em;
  border: 1px solid var(--line);
  color: var(--ink-dim);
  text-align: center;
}

.flow-files-title {
  margin: 0;
}

.flow-files-links {
  display: grid;
  grid-auto-flow: column;
  gap: 5ch;
}

.flow-files-row {
  color: var(--paper);
  text-decoration: none;
}

.flow-files-mark {
  color: var(--paper);
}

.flow-files-name {
  text-decoration: underline;
  text-decoration-color: var(--ink-faint);
  text-underline-offset: 3px;
}

.flow-files-row:hover .flow-files-name {
  text-decoration-color: var(--paper);
}


section.linked {
  padding-top: 0;
}

/* ---- card review ---------------------------------------------------- */

.card-grid {
  display: grid;
  justify-items: center;
}

.card-stage {
  position: relative;
  width: 100%;
  max-width: 360px;
  padding: 0.5rem 0.5rem 1rem;
  border: 1px solid var(--ink-dim);
  border-radius: 2rem;
  background: var(--stage-deep);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: normal;
  box-shadow:
    inset 0 0 0 1px var(--line),
    0 1rem 2.5rem color-mix(in srgb, #000 45%, transparent);
}

.card-stage::after {
  content: "";
  position: absolute;
  left: 50%;
  z-index: 3;
  height: 0.2rem;
  border-radius: 999px;
  background: var(--ink-dim);
  transform: translateX(-50%);
}

.card-stage::after {
  bottom: 0.38rem;
  width: 4.75rem;
}

.card3d {
  position: relative;
  width: 100%;
  aspect-ratio: 9 / 18;
  cursor: pointer;
}

@supports not (aspect-ratio: 1) {
  .card3d {
    height: 0;
    padding-bottom: 200%;
  }
}

.card-face {
  position: absolute;
  inset: 0;
  border: 1px solid var(--line);
  border-radius: 1.35rem;
  background: var(--stage-deep);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.card-review-scroll {
  flex: 1;
  min-height: 0;
  overflow-y: clip;
  overscroll-behavior: auto;
  scroll-behavior: smooth;
  scrollbar-width: none;
}

.card3d.scroll-enabled .card-review-scroll {
  overflow-y: auto;
}

.card-review-scroll::-webkit-scrollbar {
  display: none;
}

.card-front-body {
  flex: none;
  display: flex;
  flex-direction: column;
  padding: 28px 20px 20px;
}

.card-front-body img {
  width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 0;
  filter: grayscale(1);
}

.card-sentence {
  padding: 0;
  margin-top: 15px;
  font-size: 20px;
  line-height: normal;
  text-align: center;
  text-wrap: balance;
}

.card-sentence em {
  font-style: italic;
  font-weight: 700;
  text-decoration: none;
}

.card-hint {
  padding: 0;
  margin-top: 8px;
  font-style: italic;
  font-size: 14px;
  line-height: normal;
  color: var(--ink-dim);
  text-align: center;
}

.card-answer[hidden],
.card-grades[hidden] {
  display: none;
}

.card-answer-divider {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0 20px;
}

.card-answer-body {
  padding: 20px;
  text-align: center;
}

@media (prefers-reduced-motion: reduce) {
  .card-review-scroll {
    scroll-behavior: auto;
  }
}

.card-audio {
  --audio-progress: 0%;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 1ch;
  font-size: var(--text-ui);
  border: 1px solid var(--line);
  padding: 0.4em 1em;
  margin-bottom: 0;
  overflow: hidden;
  isolation: isolate;
}

.card-audio::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  z-index: 0;
  width: var(--audio-progress);
  background: color-mix(in srgb, var(--paper) 28%, transparent);
  pointer-events: none;
}

.card-audio > span {
  position: relative;
  z-index: 1;
}

.card-audio:hover {
  background: var(--stage-raised);
  border-color: var(--ink-dim);
}

.card-audio.is-playing {
  border-color: var(--ink-dim);
}

.card-target {
  margin: 20px 0 4px;
  font-size: 22px;
  font-weight: 700;
  line-height: normal;
  text-wrap: balance;
}

.card-transcription {
  font-size: 13px;
  line-height: normal;
  color: var(--ink-dim);
  margin-top: 4px;
  overflow-wrap: break-word;
}

.card-term {
  margin-top: 15px;
  font-size: 17px;
  font-weight: 700;
  line-height: normal;
}

.card-term .ipa {
  font-weight: 400;
  font-size: inherit;
  color: var(--ink-dim);
}

.card-gloss {
  margin-top: 3px;
  font-size: 15px;
  line-height: normal;
  color: var(--ink-dim);
}

.card-importance {
  font-size: 13px;
  line-height: normal;
  color: var(--ink-dim);
  margin-top: 8px;
}

.card-context {
  margin-top: 12px;
  padding: 10px;
  border-radius: 5px;
  text-align: left;
  font-size: 14px;
  line-height: normal;
  color: var(--ink-dim);
  background: var(--stage-raised);
}

.card-context p,
.card-context ul {
  margin: 0.4em 0;
}

.card-context ul {
  padding-left: 1.2em;
}

.card-grades {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}

.card-grades button {
  min-block-size: 3rem;
  font-size: 15px;
  line-height: 1.15;
  padding: 0.5em 0;
  color: var(--ink-dim);
  border-right: 1px solid var(--line);
  transition: background-color 120ms, border-color 120ms, color 120ms;
}

.card-grades button:last-child {
  border-right: none;
}

.card-grades button[data-grade="again"] {
  --grade-color: #e06c75;
}

.card-grades button[data-grade="hard"] {
  --grade-color: #e5c07b;
}

.card-grades button[data-grade="good"] {
  --grade-color: #98c379;
}

.card-grades button[data-grade="easy"] {
  --grade-color: #61afef;
}

.card-grades button:hover,
.card-grades button:focus-visible,
.card-grades button.is-graded {
  background: var(--grade-color);
  border-color: var(--grade-color);
  color: var(--stage-deep);
}

.card-grades.is-grading button:not(.is-graded) {
  opacity: 0.35;
}

.card-grades .eta {
  display: block;
  color: var(--ink-faint);
  font-size: inherit;
}

.card-grades button:hover .eta,
.card-grades button:focus-visible .eta,
.card-grades button.is-graded .eta {
  color: var(--stage-deep);
}

/* ---- prose ----------------------------------------------------------- */

.prose {
  max-width: var(--measure);
  display: grid;
  gap: 1rem;
  color: var(--ink-dim);
}

.lede code,
.prose code,
.faq-answer code {
  font-size: 0.8125em;
  color: var(--paper);
  background: var(--stage-raised);
  padding: 0.1em 0.45em;
}

#install .install + .prose {
  margin-top: 1.5rem;
}

/* ---- matrix ----------------------------------------------------------- */

.matrix-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.matrix-copy {
  position: static;
  margin-bottom: 0;
}

.matrix-explanation {
  margin-top: 1rem;
  max-width: var(--measure);
  color: var(--ink-dim);
  font-size: var(--text-small);
  line-height: 1.65;
}

.matrix-box {
  position: relative;
  inline-size: 100%;
  border: 1px solid var(--line);
  background: var(--stage-deep);
  padding: 1.3rem;
  font-family: var(--mono);
  font-size: var(--text-term);
  line-height: 1.6;
}

.matrix-sentences {
  display: grid;
  gap: 0.72rem;
  padding: 0.15rem 3.35rem 1.15rem 0;
}

.matrix-phrase {
  color: var(--ink-faint);
  font-size: var(--text-small);
  line-height: 1.7;
}

.matrix-word {
  padding-inline: 0.08em;
  color: var(--ink-dim);
  font-weight: 400;
  opacity: 0.42;
  transition: color 90ms linear, background-color 90ms linear, font-weight 120ms ease, opacity 90ms linear;
}

.matrix-word.seen {
  color: var(--ink-dim);
  opacity: 0.68;
}

.matrix-word.pattern-hit-1 {
  color: var(--ink-dim);
  font-weight: 400;
  opacity: 0.84;
}

.matrix-word.pattern-hit-2 {
  color: color-mix(in srgb, var(--paper) 70%, var(--ink-dim));
  font-weight: 500;
  opacity: 0.94;
}

.matrix-word.pattern-hit-3 {
  color: var(--paper);
  font-weight: 600;
  opacity: 1;
}

.matrix-word.pattern-hit-4 {
  color: var(--paper);
  font-weight: 700;
  opacity: 1;
  text-shadow: 0 0 0.55rem color-mix(in srgb, var(--paper) 18%, transparent);
}

.matrix-word.selected {
  color: var(--paper);
  background: color-mix(in srgb, var(--paper) 13%, transparent);
  font-weight: 700;
  opacity: 1;
  box-shadow: inset 0 -1px 0 var(--paper);
}

.matrix-word.active-token {
  color: var(--stage);
  background: var(--paper);
  font-weight: 700;
  opacity: 1;
  text-shadow: none;
  box-shadow: none;
}

.matrix-box.matrix-inspecting .matrix-word:not(.selected) {
  color: var(--ink-faint);
  background: transparent;
  font-weight: 400;
  opacity: 0.18;
  text-shadow: none;
  box-shadow: none;
}

.matrix-box.matrix-inspecting .matrix-word.selected {
  color: var(--stage);
  background: var(--paper);
  font-weight: 700;
  opacity: 1;
  text-shadow: none;
  box-shadow: none;
}

.matrix-band {
  border-top: 1px dashed var(--line);
  padding-top: 0.65rem;
}

.matrix-label {
  color: var(--ink-dim);
  font-size: var(--text-term);
}

.mx-cells {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(9rem, 100%), 1fr));
  gap: 0.3rem 0.4rem;
  margin-top: 0.45rem;
}

.mx-cell {
  --pattern-weight: 400;
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 1ch;
  color: var(--ink-dim);
  min-height: 2.15rem;
  padding: 0.25rem 0.35rem 0.25rem 0.5rem;
  border: 1px solid transparent;
  text-align: left;
  transition: background-color 120ms ease, border-color 120ms ease, opacity 120ms ease;
}

.mx-cell.is-empty {
  border-color: var(--line);
  color: var(--ink-faint);
}

.mx-cell.is-empty .mx-label {
  color: var(--ink-faint);
}

.mx-label {
  position: relative;
  z-index: 1;
  min-width: 0;
  font-weight: var(--pattern-weight);
  line-height: 1.25;
  transition: font-weight 120ms ease;
}

.mx-cell.seen,
.mx-cell.repeated,
.mx-cell:not(.is-empty):hover {
  color: var(--paper);
  border-color: var(--line);
}

.mx-cell.pattern-strength-2 {
  --pattern-weight: 500;
}

.mx-cell.pattern-strength-3 {
  --pattern-weight: 600;
}

.mx-cell.pattern-strength-4 {
  --pattern-weight: 700;
}

.mx-cell.seen,
.mx-cell.repeated {
  background: color-mix(in srgb, var(--paper) 4%, transparent);
}

.mx-cell.active-pattern {
  background: var(--stage-raised);
  border-color: var(--ink-dim);
}

.mx-cell.selected {
  background: var(--stage-raised);
  color: var(--paper);
  border-color: var(--paper);
  box-shadow: inset 3px 0 0 var(--paper);
}

.matrix-box.matrix-inspecting .mx-cell:not(.selected) {
  opacity: 0.3;
}

.mx-count {
  position: relative;
  z-index: 1;
  display: block;
  min-width: 3ch;
  justify-self: end;
  color: var(--paper);
  font-size: 1.08rem;
  font-weight: var(--pattern-weight);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  text-align: right;
  white-space: nowrap;
  transform-origin: right center;
  transition: font-weight 120ms ease;
}

.mx-flash {
  position: absolute;
  z-index: 0;
  inset: -1px;
  border: 1px solid var(--paper);
  background: color-mix(in srgb, var(--paper) 14%, transparent);
  pointer-events: none;
  animation: matrix-cell-flash 360ms ease-out both;
}

.mx-count.matrix-count-bump-a {
  animation: matrix-count-bump-a 260ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.mx-count.matrix-count-bump-b {
  animation: matrix-count-bump-b 260ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.pattern-arrive {
  animation: matrix-pattern-arrive 220ms ease-out;
}

@keyframes matrix-pattern-arrive {
  from {
    opacity: 0;
    transform: translateY(0.3rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes matrix-cell-flash {
  0% {
    opacity: 0;
    transform: scale(0.98);
  }
  24% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: scale(1.015);
  }
}

@keyframes matrix-count-bump-a {
  0%,
  100% {
    transform: scale(1);
  }
  38% {
    transform: scale(1.22);
    text-shadow: 0 0 0.55rem color-mix(in srgb, var(--paper) 45%, transparent);
  }
}

@keyframes matrix-count-bump-b {
  0%,
  100% {
    transform: scale(1);
  }
  38% {
    transform: scale(1.22);
    text-shadow: 0 0 0.55rem color-mix(in srgb, var(--paper) 45%, transparent);
  }
}

@media (max-width: 700px) {
  .matrix-box {
    padding: 0.9rem;
  }
  .matrix-retry {
    top: 0.5rem;
    right: 0.5rem;
  }
  .matrix-sentences {
    gap: 0.65rem;
    padding: 0.1rem 3rem 1rem 0;
  }
  .mx-cells {
    gap: 0.28rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .matrix-word,
  .mx-cell,
  .mx-count {
    transition: none;
  }
  .pattern-arrive,
  .mx-flash,
  .mx-count.matrix-count-bump-a,
  .mx-count.matrix-count-bump-b {
    animation: none;
  }
  .mx-flash {
    display: none;
  }
}

/* ---- faq ---------------------------------------------------------------- */

.faq-list {
  inline-size: 100%;
  max-width: var(--content-frame);
  margin-top: 3.5rem;
  border-bottom: 1px dashed var(--line);
}

.faq-item {
  border-top: 1px dashed var(--line);
}

.faq-item summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 3ch;
  gap: 1.5ch;
  align-items: baseline;
  padding: 0.95rem 0.5ch;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+" / "";
  justify-self: end;
  color: var(--ink-dim);
  font-weight: 400;
}

.faq-item[open] summary::after {
  content: "−" / "";
}

.faq-item summary:hover {
  background: var(--stage-raised);
}

.faq-item[open] summary {
  background: var(--stage-raised);
}

.faq-answer {
  padding: 0.25rem 0.5ch 1.4rem;
  color: var(--ink-dim);
  max-width: var(--measure);
}

.faq-answer > :is(p, ul, ol) + :is(p, ul, ol) {
  margin-top: 0.75rem;
}

.faq-answer > :is(ul, ol) {
  padding-inline-start: 1.5rem;
}

.faq-answer li + li {
  margin-top: 0.25rem;
}

.faq-answer code {
  font-size: 0.8125em;
  color: var(--paper);
  background: var(--stage-raised);
  padding: 0.1em 0.45em;
}

/* ---- footer ------------------------------------------------------------ */

.site-footer {
  margin-top: var(--section-gap);
  border-top: 1px dashed var(--line);
  padding: 3rem 0 4.5rem;
}

.footer-links {
  display: flex;
  gap: 3ch;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: var(--text-ui);
  margin-bottom: 2rem;
}

.footer-links a {
  color: var(--ink-dim);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--paper);
}

.disclaimer {
  max-width: var(--measure);
  color: var(--ink-dim);
  font-size: var(--text-small);
}

.disclaimer + .disclaimer {
  margin-top: 0.75rem;
}

.colophon {
  margin-top: 2rem;
  font-family: var(--mono);
  font-size: var(--text-ui);
  color: var(--ink-faint);
}

.colophon a {
  color: var(--ink-dim);
}

/* ---- language modal ----------------------------------------------------- */

.lang-list {
  list-style: none;
  font-family: var(--mono);
  font-size: var(--text-small);
  line-height: 2.1;
  margin-top: 0.5rem;
  max-height: calc(min(85vh, 85dvh) - 3.25rem);
  overflow-y: auto;
}

.lang-list button,
.lang-list a {
  display: grid;
  grid-template-columns: 3ch 1fr 2ch;
  gap: 2ch;
  width: 100%;
  text-align: left;
  color: var(--ink-dim);
  padding: 0 1ch;
  text-decoration: none;
}

.lang-list button:hover,
.lang-list a:hover {
  background: var(--stage-raised);
  color: var(--paper);
}

.lang-list button.active,
.lang-list a.active {
  color: var(--paper);
  font-weight: 700;
}

.lang-list button.active::after,
.lang-list a.active::after {
  content: "✓";
}

@media print {
  .site-header,
  .statusbar,
  .term-retry,
  .matrix-box {
    display: none;
  }
  .faq-item::details-content {
    content-visibility: visible;
  }
  .faq-item summary::after {
    content: none;
  }
  body {
    background: #fff;
    color: #111;
  }
  .dim,
  .faint,
  .prose,
  .lede {
    color: #444;
  }
  .chip {
    background: #111;
    color: #fff;
  }
}