/* components.css — reading surface, tappable words, inline gloss, capture moment */

/* ---- App shell ---- */
.app {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--sp-7) var(--sp-5) var(--sp-8);
}

.topbar {
  width: 100%;
  max-width: var(--measure);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--sp-7);
}

.brand {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 560;
  letter-spacing: 0.01em;
}
.brand b { color: var(--accent); font-weight: 560; }

.topbar__nav {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

.nav-link {
  position: relative;
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--muted);
  transition: color var(--dur-1) var(--ease-out);
}
.nav-link:hover { color: var(--ink); }
.nav-link.is-active { color: var(--ink); }
.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.nav-dot {
  display: inline-block;
  width: 6px; height: 6px;
  margin-left: 6px;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: middle;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-1) var(--sp-3);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  transition: border-color var(--dur-1) var(--ease-out),
              color var(--dur-1) var(--ease-out);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.theme-toggle .mono { text-transform: lowercase; }

/* ---- Reading surface ---- */
.reader { width: 100%; max-width: var(--measure); }

.reader__kicker {
  display: inline-block;
  margin-bottom: var(--sp-3);
}

.reader__title {
  font-size: var(--fs-display);
  letter-spacing: -0.01em;
  margin-bottom: var(--sp-2);
  font-variation-settings: "opsz" 96, "SOFT" 0, "WONK" 0;
}

.reader__source {
  display: block;
  color: var(--muted);
  font-style: italic;
  margin-bottom: var(--sp-6);
}

.reader__gist {
  margin-bottom: var(--sp-6);
  padding: var(--sp-3) var(--sp-4);
  border-left: 2px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 8px 8px 0;
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.7;
}
.reader__gist-tag {
  display: inline-block;
  margin-right: var(--sp-2);
  color: var(--accent);
  letter-spacing: 0.1em;
}

.reader__body p { margin-bottom: var(--sp-5); }

.reader__hint {
  margin-top: var(--sp-7);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--hairline);
  color: var(--muted);
  font-size: var(--fs-meta);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* ---- Read hub (mode picker + search + test) ---- */
.readhub { width: 100%; }
.rh-pick { width: 100%; max-width: var(--measure); margin: 0 auto; }
.rh-back { width: 100%; max-width: var(--measure); margin: 0 auto var(--sp-4); }
.rh-back .review__back:hover { color: var(--accent); }

.rh-modes { display: grid; gap: var(--sp-4); margin-top: var(--sp-6); }
.rh-mode {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas: "icon title" "icon desc";
  column-gap: var(--sp-4); row-gap: 2px;
  text-align: left;
  padding: var(--sp-5);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  background: var(--paper-raised);
  transition: border-color var(--dur-1) var(--ease-out), transform var(--dur-2) var(--ease-spring);
}
.rh-mode:hover { border-color: var(--accent); transform: translateY(-2px); }
.rh-mode__icon { grid-area: icon; align-self: center; font-size: 1.5rem; color: var(--accent); }
.rh-mode__title { grid-area: title; font-family: var(--font-display); font-size: 1.2rem; align-self: end; }
.rh-mode__desc { grid-area: desc; color: var(--muted); font-size: 0.92rem; }

.rh-search { width: 100%; max-width: var(--measure); margin: 0 auto; }
.rh-search__form { display: flex; gap: var(--sp-3); margin-top: var(--sp-5); flex-wrap: wrap; }
.rh-search__input {
  flex: 1; min-width: 14rem;
  font: inherit; font-size: 1.05rem; color: var(--ink);
  background: var(--paper); border: 1px solid var(--hairline);
  border-radius: 10px; padding: var(--sp-3) var(--sp-4);
}
.rh-search__input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.rh-hist { margin-top: var(--sp-6); }
.rh-hist__h { color: var(--muted); margin-bottom: var(--sp-2); }
.rh-hist__list { display: flex; flex-direction: column; gap: var(--sp-1); }
.rh-hist__item { display: flex; align-items: stretch; gap: var(--sp-2); }
.rh-hist__open {
  flex: 1; display: flex; align-items: baseline; justify-content: space-between; gap: var(--sp-3);
  text-align: left; padding: var(--sp-2) var(--sp-3);
  border: 1px solid var(--hairline); border-radius: 8px; color: var(--ink);
  transition: border-color var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out);
}
.rh-hist__open:hover { border-color: var(--accent); background: var(--accent-soft); }
.rh-hist__q { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rh-hist__date { color: var(--muted); flex: none; }
.rh-hist__del {
  flex: none; width: 2rem; border: 1px solid var(--hairline); border-radius: 8px;
  color: var(--muted); font-size: 1.1rem; line-height: 1;
  transition: color var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out);
}
.rh-hist__del:hover { color: var(--accent); border-color: var(--accent); }

.rh-sources { margin-top: var(--sp-6); padding-top: var(--sp-4); border-top: 1px solid var(--hairline); }
.rh-sources__live { color: var(--success); margin-bottom: var(--sp-3); letter-spacing: 0.04em; }
.rh-summary { color: var(--ink); margin-bottom: var(--sp-4); }
.rh-summary .mono { color: var(--accent); margin-right: var(--sp-2); }
.rh-sources__h { color: var(--muted); margin-bottom: var(--sp-2); }
.rh-sources__list { margin: 0; padding-left: 1.1rem; color: var(--muted); }
.rh-sources__list a { color: var(--accent); text-decoration: none; }
.rh-sources__list a:hover { text-decoration: underline; }

/* ---- reading test ---- */
.rh-test { margin-top: var(--sp-7); padding-top: var(--sp-5); border-top: 1px solid var(--hairline); }
.rh-test__h { font-size: 1.3rem; margin-bottom: var(--sp-4); }
.rh-q { margin-bottom: var(--sp-5); }
.rh-q__text { margin-bottom: var(--sp-3); line-height: 1.6; }
.rh-q__opts { display: grid; gap: var(--sp-2); }
.rh-opt {
  text-align: left;
  padding: var(--sp-2) var(--sp-3);
  border: 1px solid var(--hairline); border-radius: 8px;
  color: var(--ink);
  transition: border-color var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out);
}
.rh-opt:hover { border-color: var(--accent); }
.rh-opt.is-sel { border-color: var(--accent); background: var(--accent-soft); }
.rh-opt.is-correct { border-color: var(--success); background: var(--success-soft); color: var(--ink); }
.rh-opt.is-wrong { border-color: var(--accent); background: var(--accent-soft); text-decoration: line-through; }
.rh-q__exp { display: none; margin-top: var(--sp-2); color: var(--muted); font-size: 0.9rem; line-height: 1.6; }
.rh-q__exp.is-shown { display: block; }
.rh-test__foot { display: flex; align-items: center; gap: var(--sp-4); margin-top: var(--sp-5); }
.rh-test__score { color: var(--accent); font-size: 1.1rem; }

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

/* ---- Listening (M7) ---- */
.ls-practice { margin-top: 0; }
.ls-player {
  margin: var(--sp-5) 0 var(--sp-6);
  padding: var(--sp-4);
  border: 1px solid var(--hairline); border-radius: 12px;
  background: var(--paper-raised);
}
.ls-player__bar { display: flex; align-items: center; gap: var(--sp-3); }
.ls-ctl {
  width: 2.6rem; height: 2.6rem;
  display: grid; place-items: center;
  border: 1px solid var(--hairline); border-radius: 50%;
  color: var(--ink); font-size: 0.95rem; line-height: 1;
  transition: border-color var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out), transform var(--dur-1) var(--ease-spring);
}
.ls-ctl:hover { border-color: var(--accent); color: var(--accent); }
.ls-ctl:active { transform: scale(0.94); }
.ls-ctl--play { border-color: var(--accent); color: var(--accent); }
.ls-ctl--rate { width: auto; border-radius: 999px; padding: 0 var(--sp-3); font-size: var(--fs-meta); }
.ls-player__meta { margin-left: auto; display: flex; align-items: center; gap: var(--sp-3); color: var(--muted); font-size: var(--fs-meta); }
.ls-player__count { color: var(--accent); }
.ls-track {
  margin-top: var(--sp-4); height: 3px; border-radius: 3px;
  background: var(--hairline); overflow: hidden;
}
.ls-track__fill {
  display: block; height: 100%; width: 100%;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-2) var(--ease-out);
}
.ls-player__hint { margin-top: var(--sp-3); color: var(--muted); font-size: var(--fs-meta); }

.ls-gap {
  margin-top: var(--sp-2); max-width: 22rem;
  transition: border-color var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out);
}
.ls-gap.is-correct { border-color: var(--success); background: var(--success-soft); }
.ls-gap.is-wrong { border-color: var(--accent); background: var(--accent-soft); }
.ls-gap__sol { margin-top: var(--sp-1); color: var(--success); font-size: var(--fs-meta); }

.ls-script { margin-top: var(--sp-7); padding-top: var(--sp-5); border-top: 1px solid var(--hairline); }
.ls-script__body { margin-top: var(--sp-4); }
.ls-line {
  margin: 0 0 var(--sp-3); padding: var(--sp-2) var(--sp-3);
  border-radius: 8px; line-height: var(--leading-read);
  cursor: pointer; transition: background var(--dur-1) var(--ease-out);
}
.ls-line:hover { background: var(--accent-soft); }
.ls-line__who { display: inline-block; margin-right: var(--sp-2); color: var(--accent); font-size: var(--fs-meta); }

@media (prefers-reduced-motion: reduce) {
  .ls-ctl, .ls-track__fill, .ls-line { transition: none; }
}

/* ---- Sentence (tap off-word for a whole-sentence translation) ---- */
.sentence { border-radius: 3px; transition: background var(--dur-1) var(--ease-out); }
.sentence:hover { background: color-mix(in srgb, var(--accent) 5%, transparent); }
.sentence.is-translating { background: var(--accent-soft); }

.sentence-zh {
  display: block;
  max-width: var(--measure);
  margin: var(--sp-2) 0 var(--sp-4);
  padding: var(--sp-2) var(--sp-4);
  border-left: 2px solid var(--muted);
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.7;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity var(--dur-2) var(--ease-out), transform var(--dur-2) var(--ease-spring);
}
.sentence-zh.is-open { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) { .sentence, .sentence-zh { transition: none; } }

/* ---- Tappable word ---- */
/* The reading surface stays clean: words carry no persistent marks. Tappability
   is revealed on hover/focus; only a captured word keeps a drawn underline. */
.word {
  position: relative;
  cursor: pointer;
  color: inherit;
  border-radius: 3px;
  transition: color var(--dur-1) var(--ease-out),
              background var(--dur-1) var(--ease-out),
              transform var(--dur-2) var(--ease-spring);
}
.word:hover,
.word:focus-visible {
  color: var(--accent);
  background: var(--accent-soft);
}

/* the draw-in underline lives in ::after so we can scaleX it (transform only) */
.word::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.04em;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  border-radius: 2px;
  pointer-events: none;
}

/* captured: lifted, ochre-marked, underline drawn */
.word.is-captured {
  color: var(--accent);
  transform: translateY(-2px);
}
.word.is-captured::after {
  transform: scaleX(1);
  transition: transform 220ms var(--ease-spring);
}

/* "+1" tick badge */
.word__tick {
  position: absolute;
  top: -0.9em;
  right: -0.4em;
  font-family: var(--font-mono);
  font-size: 0.62em;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--accent);
  pointer-events: none;
  opacity: 0;
}
.word__tick.run {
  animation: tick-rise 760ms var(--ease-spring) forwards;
}
@keyframes tick-rise {
  0%   { opacity: 0; transform: translateY(4px) scale(0.9); }
  22%  { opacity: 1; transform: translateY(-2px) scale(1); }
  60%  { opacity: 1; transform: translateY(-6px) scale(1); }
  100% { opacity: 0; transform: translateY(-14px) scale(0.98); }
}

/* ---- Speaker button (pronunciation) ---- */
.say-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.7em;
  height: 1.7em;
  padding: 0;
  color: var(--muted);
  border-radius: 50%;
  vertical-align: middle;
  transition: color var(--dur-1) var(--ease-out),
              background var(--dur-1) var(--ease-out),
              transform var(--dur-1) var(--ease-spring);
}
.say-btn:hover { color: var(--accent); background: var(--accent-soft); }
.say-btn:active { transform: scale(0.9); }
.say-btn svg { display: block; }
/* a soft pulse when it speaks */
.say-btn.said { animation: say-pulse 460ms var(--ease-spring); }
@keyframes say-pulse {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.18); }
  100% { transform: scale(1); }
}

.gloss__say { margin-left: auto; }
.rcard__say {
  margin-left: 0.4em;
  width: 1.4em; height: 1.4em;
  vertical-align: middle;
  position: relative;
  top: -0.06em;
}

@media (prefers-reduced-motion: reduce) {
  .say-btn.said { animation: none; }
}

/* ---- Inline gloss (margin note, NOT a modal) ---- */
.gloss {
  display: block;
  max-width: 46ch;
  margin: var(--sp-3) 0 var(--sp-4) var(--sp-2);
  padding-left: var(--sp-4);
  border-left: 2px solid var(--accent);
  /* animated with transform + opacity only */
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity var(--dur-2) var(--ease-out),
              transform var(--dur-2) var(--ease-spring);
}
.gloss.is-open { opacity: 1; transform: translateY(0); }

.gloss__head {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  margin-bottom: var(--sp-1);
}
.gloss__lemma {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 560;
  color: var(--ink);
}
.gloss__sense { /* mono micro-label */ }

.gloss__phon { color: var(--muted); text-transform: none; letter-spacing: 0; }

.gloss__en {
  display: block;
  font-size: var(--fs-gloss);
  line-height: 1.5;
  color: var(--ink);
}
.gloss__zh {
  display: block;
  font-size: var(--fs-gloss);
  line-height: 1.6;
  color: var(--muted);
  margin-top: 2px;
}
.gloss__note {
  display: block;
  color: var(--muted);
  margin-top: 2px;
  text-transform: none;
  letter-spacing: 0.02em;
}
.gloss.is-loading .gloss__en { color: var(--muted); font-style: italic; }

@media (prefers-reduced-motion: reduce) {
  .word, .word::after, .gloss { transition: none; }
  .word__tick.run { animation: none; opacity: 0; }
}

/* ============================================================
   Review (M2): binary-swipe recognition
   ============================================================ */

.review {
  position: relative;
  width: 100%;
  max-width: 42rem;
  display: flex;
  justify-content: center;
}

.review__stage { width: 100%; max-width: 34rem; }

.review__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--sp-4);
}
.review__back { background: none; }
.review__back:hover { color: var(--accent); }
.review__status { display: inline-flex; align-items: baseline; gap: var(--sp-3); }
.review__count { color: var(--muted); }
.review__pending {
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px var(--sp-2);
  border-radius: 999px;
  letter-spacing: 0.04em;
}
.review__pending[hidden] { display: none; }

/* thin progress arc (a hairline that fills via transform only) */
.review__arc {
  position: relative;
  height: 2px;
  background: var(--hairline);
  border-radius: 2px;
  margin-bottom: var(--sp-6);
  overflow: hidden;
}
.review__arc::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: scaleX(var(--p, 0));
  transform-origin: left center;
  transition: transform var(--dur-3) var(--ease-spring);
}

/* ---- the card ---- */
.rcard {
  --got: 0;
  --miss: 0;
  position: relative;
  background: var(--paper-raised);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: var(--sp-7) var(--sp-6);
  overflow: hidden;
  touch-action: pan-y;
  user-select: none;
  box-shadow: 0 1px 0 var(--hairline), 0 18px 40px -28px rgba(0, 0, 0, 0.5);
  transition: transform var(--dur-2) var(--ease-spring),
              opacity var(--dur-2) var(--ease-out);
}
.rcard.dragging { transition: none; cursor: grabbing; }

.rcard__kicker { display: block; margin-bottom: var(--sp-4); }

.rcard__word {
  font-family: var(--font-display);
  font-size: clamp(2rem, 1.4rem + 2.6vw, 3rem);
  letter-spacing: -0.01em;
  margin-bottom: var(--sp-4);
}

.rcard__ctx { color: var(--muted); font-size: 1.05rem; line-height: 1.6; }
.rcard__cue { font-style: italic; color: var(--ink); }

/* answer hidden until reveal; rises into place with a slight overshoot */
.rcard__answer {
  margin-top: var(--sp-5);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--hairline);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
}
.rcard.is-revealed .rcard__answer {
  pointer-events: auto;
  animation: answer-rise var(--dur-3) var(--ease-spring) forwards;
}
@keyframes answer-rise {
  0%   { opacity: 0; transform: translateY(8px); }
  70%  { opacity: 1; transform: translateY(-2px); } /* overshoot */
  100% { opacity: 1; transform: translateY(0); }
}
.rcard__en { display: block; font-size: 1.1rem; }
.rcard__zh { display: block; color: var(--muted); margin-top: var(--sp-1); }

/* swipe edges: opacity-only tint, label fades in with pull */
.rcard__edge {
  position: absolute;
  top: 0; bottom: 0;
  width: 45%;
  display: flex;
  align-items: flex-start;
  padding: var(--sp-5);
  pointer-events: none;
}
.rcard__edge--got {
  right: 0;
  justify-content: flex-end;
  background: linear-gradient(270deg, var(--success-soft), transparent);
  opacity: var(--got);
}
.rcard__edge--miss {
  left: 0;
  background: linear-gradient(90deg, rgba(110,106,95,0.16), transparent);
  opacity: var(--miss);
}
.rcard__edge--got .mono { color: var(--success); }

/* commit: leave with momentum */
.rcard.leave-got  { transform: translateX(120%) rotate(8deg);  opacity: 0; }
.rcard.leave-miss { transform: translateX(-120%) rotate(-8deg); opacity: 0; }

.rcard__reveal {
  display: block;
  margin: var(--sp-5) auto 0;
  color: var(--muted);
  letter-spacing: 0.06em;
  transition: color var(--dur-1) var(--ease-out);
}
.rcard__reveal:hover { color: var(--accent); }
.rcard.is-revealed ~ .rcard__reveal { color: var(--muted); }

/* ---- bottom tab bar ---- */
.app { padding-bottom: 5.5rem; } /* room for the fixed tab bar */

.tabbar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 40;
  display: flex;
  justify-content: center;
  gap: var(--sp-6);
  padding: var(--sp-2) var(--sp-4) calc(var(--sp-2) + env(safe-area-inset-bottom, 0px));
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: saturate(1.1) blur(10px);
  border-top: 1px solid var(--hairline);
}
.tabbar__tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--sp-2) var(--sp-4);
  color: var(--muted);
  border-radius: 12px;
  transition: color var(--dur-1) var(--ease-out);
}
.tabbar__tab:hover { color: var(--ink); }
.tabbar__tab.is-active { color: var(--accent); }
.tabbar__icon { position: relative; font-size: 1.2rem; line-height: 1; }
.tabbar__label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.tabbar .nav-dot {
  position: absolute;
  top: -3px; right: -7px;
  width: 7px; height: 7px;
  margin: 0;
}

/* ---- review nudge (woven into Read) ---- */
.review-nudge {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  width: 100%;
  margin-bottom: var(--sp-6);
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  color: var(--ink);
  font-family: var(--font-read);
  font-size: 0.95rem;
  text-align: left;
  transition: border-color var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out);
}
.review-nudge:hover { border-color: var(--accent); background: var(--accent-soft); }
.review-nudge__dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent); flex: none;
}
.review-nudge b { color: var(--accent); }
.review-nudge__arrow { margin-left: auto; color: var(--muted); }

/* ---- IELTS Words home ---- */
.words-home { width: 100%; max-width: 34rem; margin: 0 auto; }
.words-home .reader__title { margin-bottom: var(--sp-3); }
.words-home__sub { color: var(--muted); line-height: 1.6; margin-bottom: var(--sp-6); }
.words-home__stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-3); margin-bottom: var(--sp-6); }
.words-home__actions { display: flex; gap: var(--sp-3); flex-wrap: wrap; }
.words-cfg {
  display: flex; flex-wrap: wrap; align-items: flex-end; gap: var(--sp-4);
  margin-top: var(--sp-5); padding-top: var(--sp-4);
  border-top: 1px solid var(--hairline);
}
.words-cfg__field { display: flex; flex-direction: column; gap: var(--sp-1); color: var(--muted); }
.words-cfg__field input {
  width: 6rem; font: inherit; font-size: 1rem; color: var(--ink);
  background: var(--paper); border: 1px solid var(--hairline);
  border-radius: 8px; padding: var(--sp-1) var(--sp-2);
}
.words-cfg__field input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.words-cfg__rec { color: var(--muted); align-self: center; }
.words-home__hint { color: var(--muted); margin-top: var(--sp-4); letter-spacing: 0.03em; }
.words-home__msg { color: var(--muted); margin-top: var(--sp-2); min-height: 1.2em; }

/* ---- IELTS screen ---- */
.ielts { width: 100%; max-width: var(--measure); margin: 0 auto; }
.ielts__head { margin-bottom: var(--sp-6); }
.ielts__sub { color: var(--muted); margin: var(--sp-2) 0 var(--sp-4); line-height: 1.6; }
.ielts__bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-4); flex-wrap: wrap;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--hairline);
}
.ielts__stat { color: var(--muted); }

.ielts__topic { margin-top: var(--sp-6); }
.ielts__topic-h {
  font-size: 1.15rem;
  display: flex; align-items: baseline; gap: var(--sp-3);
  padding-bottom: var(--sp-2);
  margin-bottom: var(--sp-2);
  border-bottom: 1px solid var(--hairline);
}
.ielts__topic-n { color: var(--muted); font-size: var(--fs-meta); }

.iword {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "main actions" "detail detail";
  align-items: center;
  gap: var(--sp-2) var(--sp-4);
  padding: var(--sp-3) var(--sp-2);
  border-bottom: 1px solid var(--hairline);
  cursor: pointer;
  border-radius: 8px;
  transition: background var(--dur-1) var(--ease-out);
}
.iword:hover { background: color-mix(in srgb, var(--accent) 5%, transparent); }
.iword__main { grid-area: main; display: flex; align-items: baseline; gap: var(--sp-3); flex-wrap: wrap; }
.iword__term { font-family: var(--font-display); font-size: 1.15rem; }
.iword__tag {
  font-size: 0.6rem; padding: 1px var(--sp-2); border-radius: 999px; border: 1px solid var(--hairline);
}
.iword__tag.is-active { color: var(--success); border-color: color-mix(in srgb, var(--success) 50%, transparent); }
.iword__tag.is-passive { color: var(--muted); }
.iword__zh { color: var(--muted); font-size: 0.95rem; }

.iword__actions { grid-area: actions; display: inline-flex; align-items: center; gap: var(--sp-3); }
.iword__add {
  font-size: var(--fs-meta); letter-spacing: 0.04em;
  padding: var(--sp-1) var(--sp-3);
  border: 1px solid var(--accent); color: var(--accent);
  border-radius: 999px;
  transition: background var(--dur-1) var(--ease-out);
}
.iword__add:hover { background: var(--accent-soft); }
.iword__add.is-added { color: var(--success); border-color: color-mix(in srgb, var(--success) 50%, transparent); }

.iword__detail {
  grid-area: detail;
  display: none;
  padding: var(--sp-2) 0 var(--sp-3);
}
.iword.is-open .iword__detail { display: block; }
.iword__en { font-size: 1rem; margin-bottom: var(--sp-2); }
.iword__ex { color: var(--muted); font-size: 0.98rem; line-height: 1.6; }
.iword__exhit { color: var(--accent); font-style: normal; }
.iword__cols { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-top: var(--sp-3); }
.iword__col {
  font-size: 0.7rem; color: var(--muted);
  padding: 2px var(--sp-2); border: 1px solid var(--hairline); border-radius: 6px;
}

/* ---- dashboard (Stats) ---- */
.dash { width: 100%; max-width: var(--measure); margin: 0 auto; }
.dash .reader__title { margin-bottom: var(--sp-5); }

.dash__model {
  display: flex; align-items: center; gap: var(--sp-3);
  width: 100%; text-align: left;
  padding: var(--sp-3) var(--sp-4);
  margin-bottom: var(--sp-6);
  border: 1px solid var(--hairline); border-radius: 10px;
  color: var(--ink); font-size: 0.95rem;
  transition: border-color var(--dur-1) var(--ease-out);
}
.dash__model:hover { border-color: var(--accent); }
.dash__model-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); flex: none; }
.dash__model-dot.is-off { background: var(--muted); }
.dash__model-edit { margin-left: auto; color: var(--accent); }

.dash__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-3);
}
@media (max-width: 30rem) { .dash__grid { grid-template-columns: repeat(2, 1fr); } }
.stat {
  display: flex; flex-direction: column; gap: var(--sp-1);
  padding: var(--sp-4);
  border: 1px solid var(--hairline); border-radius: 12px;
  background: var(--paper-raised);
}
.stat--accent { border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.stat__n { font-size: 2rem; line-height: 1; color: var(--ink); font-feature-settings: "tnum" 1; }
.stat--accent .stat__n { color: var(--accent); }
.stat__label { font-size: 0.78rem; color: var(--muted); }

.dash__prog { margin-top: var(--sp-6); }
.dash__prog-head { display: flex; justify-content: space-between; color: var(--muted); margin-bottom: var(--sp-2); }
.dash__bar { height: 8px; background: var(--hairline); border-radius: 999px; overflow: hidden; }
.dash__bar span {
  display: block; height: 100%;
  background: var(--success); border-radius: 999px;
  transform-origin: left center;
  transition: transform var(--dur-3) var(--ease-spring);
}
.dash__note { color: var(--muted); font-size: 0.85rem; margin-top: var(--sp-3); }

/* fluency */
.dash__flu { margin-top: var(--sp-6); padding-top: var(--sp-5); border-top: 1px solid var(--hairline); }
.dash__spark { display: block; width: 100%; height: 40px; margin: var(--sp-2) 0; }
.dash__sample {
  margin-top: var(--sp-3);
  padding: var(--sp-4);
  background: var(--paper-raised);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  font-family: var(--font-read);
  line-height: 1.8;
  color: var(--ink);
}
.dash__unknown {
  color: var(--muted);
  opacity: 0.55;
  text-decoration: underline dotted var(--hairline);
  text-underline-offset: 3px;
}

/* ---- M5 motion polish: composed entry on the dashboard ---- */
.dash .stat, .dash__prog, .dash__flu, .dash__model {
  animation: dash-rise var(--dur-3) var(--ease-spring) both;
}
.dash__model { animation-delay: 20ms; }
.dash__grid .stat:nth-child(1) { animation-delay: 60ms; }
.dash__grid .stat:nth-child(2) { animation-delay: 100ms; }
.dash__grid .stat:nth-child(3) { animation-delay: 140ms; }
.dash__grid .stat:nth-child(4) { animation-delay: 180ms; }
.dash__grid .stat:nth-child(5) { animation-delay: 220ms; }
.dash__grid .stat:nth-child(6) { animation-delay: 260ms; }
.dash__prog { animation-delay: 300ms; }
.dash__flu { animation-delay: 340ms; }
@keyframes dash-rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
/* bars grow from empty on entry */
.dash__bar span { animation: bar-grow var(--dur-3) var(--ease-spring) both; animation-delay: 380ms; }
@keyframes bar-grow { from { transform: scaleX(0); } }

@media (prefers-reduced-motion: reduce) {
  .dash .stat, .dash__prog, .dash__flu, .dash__model, .dash__bar span { animation: none; }
}

/* ---- settings screen ---- */
.settings { width: 100%; max-width: 32rem; margin: 0 auto; }
#dash-mount + .settings {
  margin-top: var(--sp-7);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--hairline);
}
.settings .reader__title { margin-bottom: var(--sp-3); }
.settings__note { color: var(--muted); font-size: 0.92rem; line-height: 1.6; margin-bottom: var(--sp-5); }

/* ---- icon button (settings) ---- */
.icon-btn {
  width: 2rem; height: 2rem;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--hairline);
  border-radius: 50%;
  color: var(--muted);
  font-size: 0.95rem;
  transition: border-color var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ---- settings modal ---- */
.modal-back {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.42);
  display: flex; align-items: center; justify-content: center;
  padding: var(--sp-5);
  z-index: 60;
  animation: fade-in var(--dur-2) var(--ease-out);
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
.modal {
  position: relative;
  width: 100%; max-width: 30rem;
  max-height: 88vh; overflow-y: auto;
  background: var(--paper-raised);
  border: 1px solid var(--hairline);
  border-radius: 16px;
  padding: var(--sp-6);
  box-shadow: 0 30px 70px -30px rgba(0,0,0,0.6);
  animation: modal-rise var(--dur-3) var(--ease-spring);
}
@keyframes modal-rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.modal__close {
  position: absolute; top: var(--sp-3); right: var(--sp-4);
  font-size: 1.4rem; line-height: 1; color: var(--muted);
}
.modal__close:hover { color: var(--accent); }
.modal__title { font-size: 1.3rem; margin-bottom: var(--sp-2); }
.modal__note { color: var(--muted); font-size: 0.92rem; line-height: 1.55; margin-bottom: var(--sp-4); }
.modal__label { display: block; margin-bottom: var(--sp-1); color: var(--muted); }
.modal__input {
  width: 100%;
  font: inherit; font-size: 0.95rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: var(--sp-2) var(--sp-3);
  margin-bottom: var(--sp-4);
}
.modal__input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.modal__row { display: flex; gap: var(--sp-3); flex-wrap: wrap; }
.modal__hr { border: none; border-top: 1px solid var(--hairline); margin: var(--sp-5) 0; }

/* ---- generating / error states ---- */
.gen-state { text-align: left; }
.gen-spinner {
  display: inline-block; width: 28px; height: 28px; margin-top: var(--sp-5);
  border: 2px solid var(--hairline); border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 900ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* "being written" skeleton — calmer than a spinner, fits the reading-room feel */
.gen-title { opacity: 0; animation: gen-fade 600ms var(--ease-out) forwards; }
@keyframes gen-fade { to { opacity: 1; } }
.gen-skel {
  display: flex; flex-direction: column; gap: 0.7rem;
  max-width: 46ch; margin-top: var(--sp-6);
}
.gen-line {
  position: relative; overflow: hidden;
  height: 13px; border-radius: 7px;
  background: var(--hairline);
}
.gen-line:nth-child(1) { width: 96%; }
.gen-line:nth-child(2) { width: 88%; }
.gen-line:nth-child(3) { width: 92%; }
.gen-line:nth-child(4) { width: 70%; }
.gen-line:nth-child(5) { width: 84%; }
.gen-line:nth-child(6) { width: 52%; }
.gen-line::after {
  content: ""; position: absolute; inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent,
    color-mix(in srgb, var(--accent) 22%, transparent), transparent);
  animation: gen-sweep 1.4s var(--ease-out) infinite;
}
.gen-line:nth-child(2)::after { animation-delay: 0.12s; }
.gen-line:nth-child(3)::after { animation-delay: 0.24s; }
.gen-line:nth-child(4)::after { animation-delay: 0.36s; }
.gen-line:nth-child(5)::after { animation-delay: 0.48s; }
.gen-line:nth-child(6)::after { animation-delay: 0.60s; }
@keyframes gen-sweep { to { transform: translateX(100%); } }

@media (prefers-reduced-motion: reduce) {
  .gen-title { animation: none; opacity: 1; }
  .gen-line::after { animation: none; }
}
.gen-actions { display: flex; gap: var(--sp-3); flex-wrap: wrap; margin-top: var(--sp-5); }

/* ---- key banner (no key yet) ---- */
.key-banner {
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4);
  padding: var(--sp-3) var(--sp-4);
  margin-bottom: var(--sp-6);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  color: var(--muted);
  font-size: 0.92rem;
}
.key-banner__btn {
  flex: none;
  padding: var(--sp-1) var(--sp-3);
  border: 1px solid var(--accent); color: var(--accent);
  border-radius: 999px;
  letter-spacing: 0.04em;
}
.key-banner__btn:hover { background: var(--accent-soft); }

@media (prefers-reduced-motion: reduce) {
  .modal-back, .modal { animation: none; }
  .gen-spinner { animation-duration: 0.001ms; }
}

/* ---- toast (fast-lane import feedback) ---- */
.toast {
  position: fixed;
  left: 50%;
  bottom: var(--sp-6);
  transform: translateX(-50%) translateY(0);
  background: var(--ink);
  color: var(--paper);
  padding: var(--sp-3) var(--sp-5);
  border-radius: 999px;
  letter-spacing: 0.04em;
  z-index: 50;
  box-shadow: 0 12px 30px -16px rgba(0, 0, 0, 0.6);
  animation: toast-in 3200ms var(--ease-spring) forwards;
}
@keyframes toast-in {
  0%   { opacity: 0; transform: translateX(-50%) translateY(12px); }
  8%   { opacity: 1; transform: translateX(-50%) translateY(0); }
  88%  { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(8px); }
}
@media (prefers-reduced-motion: reduce) {
  .toast { animation: none; }
}

/* ---- task ladder (M3): cloze + produce ---- */
.rcard__bodywrap { display: block; }

/* stage chip colour shifts as the word matures */
.rcard[data-stage="2"] .rcard__kicker { color: var(--accent); }
.rcard[data-stage="3"] .rcard__kicker { color: var(--success); }

/* cloze / produce cue text */
.rcard__hint-zh {
  font-family: var(--font-read);
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: var(--sp-4);
}
.rcard__prompt-zh {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 1.3rem + 2vw, 2.6rem);
  letter-spacing: -0.01em;
  margin-bottom: var(--sp-2);
}
.rcard__instruct { display: block; margin-bottom: var(--sp-5); color: var(--muted); }

/* the blank a word rises into */
.rcard__cloze { font-size: 1.15rem; line-height: 1.7; }
.cloze-blank {
  display: inline-block;
  position: relative;
  min-width: 3ch;
  text-align: center;
  border-bottom: 2px solid var(--accent);
  vertical-align: baseline;
  line-height: 1.2;
}
.cloze-fill {
  display: inline-block;
  color: var(--accent);
  font-style: normal;
  opacity: 0;
  transform: translateY(8px);
}
.rcard.is-revealed .cloze-fill {
  animation: answer-rise var(--dur-3) var(--ease-spring) forwards;
}

/* revealed answer word (cloze/produce) */
.rcard__answer-word {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--ink);
  margin-bottom: var(--sp-2);
}

/* stage-up flourish — earned and quiet */
.stageup {
  position: absolute;
  top: 8%;
  left: 50%;
  padding: var(--sp-2) var(--sp-4);
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent);
  background: var(--paper-raised);
  letter-spacing: 0.08em;
  pointer-events: none;
  transform: translateX(-50%) scale(0.9);
  opacity: 0;
  animation: stageup 1100ms var(--ease-spring) forwards;
}
@keyframes stageup {
  0%   { opacity: 0; transform: translateX(-50%) translateY(6px) scale(0.9); }
  20%  { opacity: 1; transform: translateX(-50%) translateY(0) scale(1.06); }
  45%  { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
  100% { opacity: 0; transform: translateX(-50%) translateY(-10px) scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .rcard.is-revealed .cloze-fill { animation: none; opacity: 1; transform: none; }
  .stageup { animation: none; opacity: 1; }
}

/* ---- empty / completion (calm breath) ---- */
.review__done {
  max-width: 30rem;
  text-align: center;
  padding-top: var(--sp-7);
}
.review__done h2 {
  font-size: clamp(1.8rem, 1.4rem + 1.6vw, 2.4rem);
  margin-bottom: var(--sp-3);
}
.review__sub { color: var(--muted); margin-bottom: var(--sp-6); }
.review__breath {
  display: block;
  width: 84px; height: 84px;
  margin: 0 auto var(--sp-6);
  border-radius: 50%;
  border: 2px solid var(--hairline);
  animation: breath 4s var(--ease-spring) infinite;
}
.review__breath.is-complete { border-color: var(--accent); }
@keyframes breath {
  0%, 100% { transform: scale(0.9); opacity: 0.6; }
  50%      { transform: scale(1.05); opacity: 1; }
}
.review__cta {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: var(--sp-3) var(--sp-5);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  transition: border-color var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}
.review__cta:hover { border-color: var(--accent); color: var(--accent); }
.review__done-actions { display: flex; gap: var(--sp-3); justify-content: center; flex-wrap: wrap; }
.review__cta--ghost { color: var(--muted); }

@media (prefers-reduced-motion: reduce) {
  .rcard, .review__arc::after { transition: none; }
  .rcard.is-revealed .rcard__answer { animation: none; opacity: 1; transform: none; }
  .review__breath { animation: none; }
}