/* Math Fluency Lab student app — mastery meter, celebrations, buddy, recommended next. Reads shell.css tokens. */

/* Mastery meter: eight segments for independent answers and a star for "remembered". The stage is in words. */
.skill-meter {
  margin-top: var(--s3);
}
.meter-wrap {
  display: grid;
  gap: var(--s1);
  max-width: 34rem;
}
.meter-row {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0 var(--s2);
  align-items: baseline;
}
.meter-stage {
  color: var(--navy);
}
.meter-count,
.meter-help {
  color: var(--ink-2);
  font-size: 0.92rem;
}
.meter-help {
  margin: 0;
}
.meter {
  display: grid;
  grid-template-columns: repeat(8, 1fr) auto;
  gap: 4px;
  align-items: center;
}
.meter i,
.meter-dots i {
  display: block;
  height: 12px;
  border-radius: 6px;
  border: 1.5px solid var(--q3);
  background: var(--surface);
}
.meter i.on,
.meter-dots i.on {
  background: var(--q3);
}
.meter i.fresh {
  animation: meter-fill 600ms ease-out;
}
.meter-goal {
  font-size: 1.1rem;
  line-height: 1;
  color: var(--line-2);
  padding-left: 2px;
}
.meter-goal.on {
  color: #a16207;
}
.meter-wrap[data-stage="remembered"] .meter-stage::before {
  content: "★ ";
  color: #a16207;
}
@keyframes meter-fill {
  0% {
    transform: scaleX(0.2);
    box-shadow: 0 0 0 0 rgb(15 118 110 / 50%);
  }
  70% {
    transform: scaleX(1);
    box-shadow: 0 0 0 6px rgb(15 118 110 / 0%);
  }
}
.meter-mini {
  display: inline-flex;
  align-items: center;
  gap: var(--s2);
  font-size: 0.88rem;
  color: var(--ink-2);
}
.meter-dots {
  display: inline-grid;
  grid-template-columns: repeat(8, 8px);
  gap: 3px;
}
.meter-dots i {
  width: 8px;
  height: 8px;
  border-width: 1.5px;
}
.card .meter-mini,
.feature .meter-mini {
  margin: 0;
}
.plist .meter-mini {
  margin-left: var(--s2);
}

/* A right answer: a short check-mark pop. The bigger card is for a stage change on the meter. */
.feedback.is-right .cheer-mark + strong::before {
  content: none;
}
.cheer-mark {
  display: inline-grid;
  place-items: center;
  width: 1.5em;
  height: 1.5em;
  margin-right: 0.35em;
  border-radius: 50%;
  background: var(--right);
  color: #fff;
  font-weight: 700;
  vertical-align: -0.2em;
  animation: cheer-pop 420ms cubic-bezier(0.3, 1.6, 0.5, 1);
}
@keyframes cheer-pop {
  0% {
    transform: scale(0.3);
    opacity: 0;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}
.cheer {
  position: relative;
  margin: var(--s3) 0;
  padding: var(--s4);
  border-radius: var(--r);
  background: var(--surface);
  border: 2px solid #e2b33c;
  overflow: hidden;
  animation: cheer-rise 380ms ease-out;
}
.cheer-remembered {
  border-width: 3px;
  background: #fffaf0;
}
.cheer-title {
  margin: 0 0 var(--s2);
  line-height: 1.25;
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--navy);
  font-weight: 600;
}
.cheer-remembered .cheer-title {
  font-size: 1.55rem;
}
.cheer-star {
  color: #a16207;
}
.cheer-stars,
.cheer-stickers {
  color: var(--ink);
}
.cheer-sticker {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  background: #fdf3d8;
  margin: 2px 4px 2px 0;
}
.cheer-burst {
  position: absolute;
  top: 28px;
  left: 28px;
  pointer-events: none;
}
.cheer-burst i {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: #e2b33c;
  opacity: 0;
  transform: rotate(var(--a)) translateY(0);
  animation: cheer-burst 800ms ease-out var(--d) 1;
}
.cheer-burst i:nth-child(3n) {
  background: var(--q3);
}
.cheer-burst i:nth-child(3n + 1) {
  background: var(--q2);
}
@keyframes cheer-rise {
  0% {
    transform: translateY(8px);
    opacity: 0;
  }
  100% {
    transform: none;
    opacity: 1;
  }
}
@keyframes cheer-burst {
  0% {
    opacity: 1;
    transform: rotate(var(--a)) translateY(0);
  }
  100% {
    opacity: 0;
    transform: rotate(var(--a)) translateY(-56px);
  }
}

/* Buddy: small, beside its line, never on top of the problem. */
.buddy {
  display: flex;
  align-items: center;
  gap: var(--s3);
  margin: var(--s2) 0;
}
.buddy-art {
  flex: 0 0 auto;
  width: 48px;
  height: 52px;
}
.buddy-art .bd-svg {
  width: 100%;
  height: 100%;
}
.buddy-line {
  margin: 0;
  font-size: 0.98rem;
  color: var(--ink);
}
.buddy-cheer .buddy-art {
  width: 64px;
  height: 70px;
}
.hero-buddy {
  min-height: 60px;
}
.buddy-home {
  margin: 0 0 var(--s2);
}
.buddy-home .buddy-line {
  color: var(--ink-2);
}

/* Recommended next: a short list of links, each a name, the reason, and the meter mirror. */
.rec {
  margin-top: var(--s5);
}
.rec-title {
  font-size: 1.05rem;
  color: var(--navy);
  margin: 0 0 var(--s2);
}
.cheer .rec {
  margin-top: var(--s3);
}
.rec-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--s3);
}
.rec-card {
  display: grid;
  gap: 2px;
  min-height: 44px;
  padding: var(--s3) var(--s4);
  border: 1.5px solid var(--line-2);
  border-radius: var(--r);
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
}
.rec-card:hover {
  border-color: var(--blue);
}
.rec-card:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}
.rec-name {
  font-weight: 600;
  color: var(--blue-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.rec-why {
  color: var(--ink-2);
  font-size: 0.92rem;
}

/* Reduced motion (system or the app's own setting): the same acknowledgement, standing still. */
html[data-motion="reduce"] .cheer-burst {
  display: none;
}
@media (prefers-reduced-motion: reduce) {
  .cheer-burst {
    display: none;
  }
}
@media (forced-colors: active) {
  .meter i,
  .meter-dots i {
    border-color: CanvasText;
  }
  .meter i.on,
  .meter-dots i.on {
    background: CanvasText;
  }
}