/* Mole Rush — game-specific styles (shared look comes from ../../assets/site.css).
   Every class here starts with "mr-" so it can't clash with the site's own classes.
   Animations are short CSS transitions/keyframes only; prefers-reduced-motion
   switches them off (see the end of this file and site.css). */

.mr-page .wrap {
  max-width: 1240px;
}

.mr-page {
  touch-action: manipulation;
}

.mr-main {
  padding-left: max(var(--gutter), env(safe-area-inset-left, 0px));
  padding-right: max(var(--gutter), env(safe-area-inset-right, 0px));
}

.mr-page .site-header {
  padding-top: 12px;
  padding-bottom: 6px;
}

.mr-page .site-footer {
  margin-top: 32px;
}

.mr-screen {
  padding: 4px 0 8px;
}

.mr-screen h2:focus,
.mr-screen h2:focus-visible {
  outline-offset: 4px;
}

/* ---------- Title ---------- */

.mr-hero {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 8px 0 12px;
}

.mr-hero-icon {
  flex: none;
  width: 68px;
  height: 68px;
}

.mr-hero-face {
  fill: rgba(45, 212, 191, 0.1);
  stroke: var(--teal);
  stroke-width: 4;
}

.mr-hero-crown {
  fill: var(--teal);
}

.mr-hero-tick {
  fill: none;
  stroke: var(--muted);
  stroke-width: 3;
  stroke-linecap: round;
}

.mr-hero-hand {
  fill: none;
  stroke: var(--amber);
  stroke-width: 4;
  stroke-linecap: round;
}

.mr-hero-pin {
  fill: var(--amber);
}

.mr-hero-speed {
  fill: none;
  stroke: var(--violet);
  stroke-width: 3;
  stroke-linecap: round;
}

.mr-logo {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2rem, 1.5rem + 2.4vw, 3rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--text);
}

.mr-tagline {
  margin: 4px 0 0;
  font-family: var(--sans);
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--teal);
}

.mr-intro {
  max-width: 46rem;
}

.mr-start {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0;
}

.mr-start-btn {
  min-width: 220px;
}

.mr-code-form {
  max-width: 36rem;
  margin: 0 0 18px;
  padding: 16px 18px;
}

.mr-field-label {
  display: block;
  font-weight: 700;
  font-size: 1.0625rem;
}

.mr-code-help {
  margin: 4px 0 10px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.mr-code-help b {
  color: var(--text);
}

.mr-code-row {
  display: flex;
  gap: 10px;
}

.mr-input {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 48px;
  padding: 8px 14px;
  border: 2px solid var(--line-strong);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
  font: 700 1.25rem/1.2 ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mr-input::placeholder {
  color: rgba(255, 255, 255, 0.5);
  opacity: 1;
}

.mr-input:focus-visible {
  border-color: var(--teal);
}

.mr-input[aria-invalid="true"] {
  border-color: var(--bad);
}

.mr-code-error {
  min-height: 1.4em;
  margin: 8px 0 0;
  color: var(--bad);
  font-weight: 600;
  font-size: 0.9375rem;
}

.mr-code-error:empty {
  min-height: 0;
  margin: 0;
}

.mr-extras {
  display: grid;
  gap: 12px;
  margin-top: 8px;
}

@media (min-width: 900px) {
  .mr-extras {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }
}

.mr-details > summary {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 10px 18px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.mr-details > summary::-webkit-details-marker {
  display: none;
}

.mr-details > summary::before {
  content: "▸";
  display: inline-block;
  width: 1.2em;
  color: var(--teal);
  transition: transform 0.15s ease;
}

.mr-details[open] > summary::before {
  transform: rotate(90deg);
}

.mr-details-body {
  padding: 0 18px 14px;
}

.mr-howto-list {
  margin: 0;
  padding-left: 1.2em;
  display: grid;
  gap: 6px;
}

.mr-soon {
  margin: 0;
  padding: 14px 18px;
  color: var(--muted);
}

.mr-soon-tag {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 10px;
  border: 1px dashed var(--line-strong);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--amber);
}

/* ---------- Map select ---------- */

.mr-screen-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin: 6px 0 12px;
}

.mr-section-title {
  margin: 0;
  font-size: clamp(1.5rem, 1.3rem + 1vw, 2rem);
}

.mr-mode {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  margin: 0 0 16px;
  padding: 12px 16px;
}

.mr-mode-text {
  margin: 0;
  flex: 1 1 18rem;
  color: var(--muted);
}

.mr-mode-text strong {
  color: var(--text);
}

.mr-code-tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 6px;
  background: var(--amber-soft);
  color: var(--amber);
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  letter-spacing: 0.06em;
}

.mr-mode-text .mr-code-tag {
  color: var(--amber);
}

.mr-map-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr));
  gap: 14px;
}

.mr-map-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.015));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 14px 32px rgba(0, 0, 0, 0.3);
}

.mr-map-card[data-status="ready"] {
  border-color: rgba(45, 212, 191, 0.45);
}

.mr-map-art {
  position: relative;
  height: 84px;
  background: #1f2937;
}

/* A little race-track strip for each map */
.mr-map-card[data-map="1"] .mr-map-art {
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.85) 0 18px, transparent 18px 36px) 0 50% / 100% 4px no-repeat,
    linear-gradient(180deg, #0f766e 0 18%, #1f2937 18% 82%, #0f766e 82% 100%);
}

.mr-map-card[data-map="2"] .mr-map-art {
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.85) 0 18px, transparent 18px 36px) 0 50% / 100% 4px no-repeat,
    linear-gradient(180deg, #b45309 0 18%, #292524 18% 82%, #b45309 82% 100%);
}

.mr-map-card[data-map="3"] .mr-map-art {
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.85) 0 18px, transparent 18px 36px) 0 50% / 100% 4px no-repeat,
    linear-gradient(180deg, #6d28d9 0 18%, #1e1b2e 18% 82%, #6d28d9 82% 100%);
}

.mr-map-card[data-map="4"] .mr-map-art {
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.85) 0 18px, transparent 18px 36px) 0 50% / 100% 4px no-repeat,
    linear-gradient(180deg, #be123c 0 18%, #2a1a1f 18% 82%, #be123c 82% 100%);
}

.mr-map-card[data-status="coming-soon"] .mr-map-art {
  filter: grayscale(0.75) brightness(0.55);
}

.mr-map-num {
  position: absolute;
  right: 14px;
  bottom: 4px;
  font-family: var(--serif);
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1;
  color: #fff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.6);
}

.mr-map-body {
  flex: 1;
  padding: 14px 16px 8px;
}

.mr-map-kicker {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
}

.mr-map-name {
  margin: 2px 0 6px;
  font-size: 1.35rem;
}

.mr-map-blurb {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.mr-map-best {
  margin: 8px 0 0;
  font-size: 0.875rem;
  color: var(--muted);
}

.mr-map-best strong {
  color: var(--good);
}

.mr-map-actions {
  padding: 8px 16px 16px;
}

.mr-map-play {
  width: 100%;
}

/* ---------- Play: HUD ---------- */

.mr-hud {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 4px 0 12px;
}

.mr-hud-mid {
  flex: 1 1 220px;
  min-width: 0;
}

.mr-hud-pos {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 700;
}

.mr-progress {
  list-style: none;
  display: flex;
  gap: 4px;
  margin: 5px 0 0;
  padding: 0;
}

.mr-progress-dot {
  flex: 1 1 0;
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.13);
  transition: background-color 0.2s ease;
}

.mr-progress-dot.is-current {
  background: rgba(45, 212, 191, 0.45);
  box-shadow: 0 0 0 2px var(--teal);
}

.mr-progress-dot.is-first {
  background: var(--good);
}

.mr-progress-dot.is-later {
  background: var(--amber);
}

.mr-progress-dot.is-shown {
  background: var(--violet);
}

.mr-hud-chip {
  margin: 0;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass);
  font-size: 0.9375rem;
  white-space: nowrap;
}

.mr-hud-label {
  color: var(--muted);
  font-size: 0.8125rem;
  font-weight: 600;
}

.mr-hud-chip b {
  font-variant-numeric: tabular-nums;
}

@media (max-width: 599px) {
  .mr-hud-mid {
    order: 5;
    flex-basis: 100%;
  }

  .mr-quit {
    margin-right: auto;
  }
}

/* ---------- Problem card ---------- */

.mr-q {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px 16px;
  margin-bottom: 12px;
}

@media (min-width: 880px) {
  .mr-q {
    grid-template-columns: minmax(0, 1fr) minmax(13rem, 16rem);
    align-items: start;
  }
}

.mr-q-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 6px;
}

.mr-chip {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 2px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--muted);
}

.mr-chip-type {
  color: var(--teal);
  border-color: rgba(45, 212, 191, 0.4);
}

.mr-chip-bal {
  color: var(--violet);
  border-color: rgba(167, 139, 250, 0.45);
}

.mr-q-text {
  margin: 0 0 10px;
  font-family: var(--sans);
  font-size: clamp(1.125rem, 1rem + 0.55vw, 1.375rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0;
  max-width: 48rem;
}

.mr-eq-box {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 14px;
}

.mr-eq-label {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.mr-equation {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 2px 8px;
  margin: 0;
  padding: 4px 12px;
  border-radius: 10px;
  background: var(--glass);
  font-size: clamp(1.15rem, 1.05rem + 0.4vw, 1.35rem);
}

.mr-eq-term {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
}

.mr-eq-term .mr-eq-coef {
  margin-right: -5px;
}

.mr-eq-coef {
  margin-right: 3px;
  font-weight: 700;
}

.mr-eq-plus {
  color: var(--muted);
  font-weight: 700;
}

.mr-eq-arrow {
  padding: 0 4px;
  font-family: var(--sans);
  font-size: 1.3em;
  font-weight: 900;
  line-height: 1;
  color: var(--amber);
}

.mr-formula {
  font-family: var(--serif);
  font-weight: 700;
  white-space: nowrap;
}

/* Subscripts stay readable on small screens: never below 12px */
.mr-formula sub {
  font-size: max(0.75em, 12px);
  line-height: 0;
  vertical-align: -0.28em;
}

/* Molar masses box */
.mr-mm {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(167, 139, 250, 0.07);
}

.mr-mm-title {
  margin: 0 0 4px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--violet);
}

.mr-mm-list {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 18px;
  margin: 0;
}

.mr-mm-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.mr-mm-row dt {
  font-size: 1.05rem;
}

.mr-mm-row dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
  white-space: nowrap;
}

.mr-mm-num {
  color: var(--text);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

@media (min-width: 880px) {
  .mr-mm-list {
    display: grid;
    gap: 2px;
  }
}

/* ---------- Work panel ---------- */

.mr-work {
  padding: 18px 16px 16px;
}

/* The train track */
.mr-track {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 26px 8px;
  padding: 18px 4px 6px;
  font-size: 1.0625rem;
  -webkit-user-select: none;
  user-select: none;
}

.mr-seg {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mr-op {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--muted);
}

.mr-term {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  min-height: 52px;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--glass-strong);
  white-space: nowrap;
}

.mr-given {
  border-color: rgba(251, 191, 36, 0.45);
}

.mr-answer {
  border-style: dashed;
}

.mr-answer.is-done {
  border-style: solid;
  border-color: var(--good);
  background: var(--good-soft);
  animation: mr-glow 0.6s ease-out;
}

.mr-num {
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.mr-answer-num {
  color: var(--muted);
}

.mr-answer.is-done .mr-answer-num {
  color: var(--good);
}

/* A fraction: top box, bar, bottom box. A 2-column grid (number | box) so the top
   and bottom boxes always share one width and their numbers line up on the right. */
.mr-frac {
  position: relative;
  display: inline-grid;
  grid-template-columns: auto auto;
  align-items: center;
  gap: 6px;
}

.mr-frac .mr-cell,
.mr-frac .mr-slot {
  display: contents;
}

.mr-frac .mr-num {
  justify-self: end;
}

.mr-frac .mr-slot-box {
  align-self: stretch;
}

.mr-frac-badge {
  position: absolute;
  top: -22px;
  left: 50%;
  transform: translateX(-50%);
  min-width: 20px;
  height: 18px;
  padding: 0 6px;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 18px;
  text-align: center;
}

.mr-frac-bar {
  grid-column: 1 / -1;
  height: 3px;
  border-radius: 2px;
  background: rgba(247, 246, 243, 0.75);
}

.mr-cell {
  display: flex;
  justify-content: center;
}

.mr-slot {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Map 1 hides the numbers until the setup is right */
.mr-slot .mr-num {
  min-width: 1.2em;
  text-align: right;
}

.mr-slot .mr-num.mr-num-hidden {
  width: 22px;
  min-width: 22px;
  height: 30px;
  border: 1px dashed rgba(255, 255, 255, 0.22);
  border-radius: 6px;
}

.mr-slot .mr-num.is-shown {
  color: var(--text);
  animation: mr-fade-in 0.35s ease-out both;
}

.mr-slot-box {
  position: relative;
  flex: 1 1 auto;
}

.mr-slot-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-width: 116px;
  min-height: 52px;
  padding: 8px 14px;
  border: 2px dashed var(--line-strong);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.mr-slot-ph {
  color: rgba(255, 255, 255, 0.55);
  font-weight: 700;
}

.mr-slot.is-filled .mr-slot-btn {
  border-style: solid;
  background: var(--glass-strong);
}

.mr-board.is-picking .mr-slot-btn {
  border-color: var(--teal);
  background: rgba(45, 212, 191, 0.07);
}

.mr-board.is-picking .mr-slot.is-empty .mr-slot-btn {
  background: rgba(45, 212, 191, 0.12);
}

.mr-slot.is-over .mr-slot-btn,
.mr-board.is-picking .mr-slot-btn:hover {
  border-style: solid;
  border-color: var(--teal);
  background: rgba(45, 212, 191, 0.24);
}

.mr-slot.is-missing .mr-slot-btn {
  border-color: var(--amber);
  background: var(--amber-soft);
}

.mr-slot.is-ok .mr-slot-btn {
  border-style: solid;
  border-color: var(--good);
  background: var(--good-soft);
}

.mr-slot.is-bad .mr-slot-btn {
  border-style: solid;
  border-color: var(--bad);
  background: var(--bad-soft);
  animation: mr-shake 0.3s ease;
}

.mr-slot-btn.is-drag-source {
  opacity: 0.55;
}

.mr-slot-btn[aria-disabled="true"] {
  cursor: default;
}

@media (hover: hover) {
  .mr-slot-btn:hover {
    border-color: rgba(255, 255, 255, 0.4);
  }

  .mr-slot.is-ok .mr-slot-btn:hover {
    border-color: var(--good);
  }

  .mr-slot.is-bad .mr-slot-btn:hover {
    border-color: var(--bad);
  }
}

/* ✓ / ✗ badge on a checked box */
.mr-mark {
  position: absolute;
  top: -9px;
  left: -9px;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  font-size: 0.8125rem;
  font-weight: 900;
  line-height: 1;
  color: var(--on-accent);
  pointer-events: none;
}

.mr-mark:empty {
  display: none;
}

/* Bottom boxes wear their badge below, so the fraction bar stays clear */
.mr-slot[data-pos="den"] .mr-mark {
  top: auto;
  bottom: -9px;
}

.mr-slot.is-ok .mr-mark {
  background: var(--good);
  animation: mr-pop 0.25s ease-out;
}

.mr-slot.is-bad .mr-mark {
  background: var(--bad);
  animation: mr-pop 0.25s ease-out;
}

/* Small × to clear a filled box: sits inside the box on the right (26px circle, 44px tap area) */
.mr-slot.is-filled .mr-slot-btn {
  padding-right: 38px;
}

.mr-board.is-done .mr-slot .mr-slot-btn {
  padding-right: 14px;
}

.mr-slot-x {
  position: absolute;
  top: 50%;
  right: 7px;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  margin-top: -13px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: var(--muted);
  font: 700 0.95rem/1 var(--sans);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.mr-slot-x::after {
  content: "";
  position: absolute;
  inset: -9px;
  border-radius: 50%;
}

@media (hover: hover) {
  .mr-slot-x:hover {
    background: var(--bad);
    color: var(--on-accent);
  }
}

.mr-slot.is-pop .mr-slot-btn {
  animation: mr-pop 0.2s ease-out;
}

/* Unit + chemical label ("mol H₂") — used in tiles, boxes, the given and the answer */
.mr-label {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.3em;
  white-space: nowrap;
  transition: color 0.3s ease, opacity 0.3s ease;
}

.mr-unit {
  font-family: var(--sans);
  font-size: 0.92em;
  font-weight: 800;
}

.mr-unit.is-mol {
  color: var(--teal);
}

.mr-unit.is-g {
  color: var(--amber);
}

/* Cancelling units: a red-pen line strikes through each matching pair */
.mr-label::after {
  content: "";
  position: absolute;
  left: -5px;
  right: -5px;
  top: 52%;
  height: 3px;
  border-radius: 2px;
  background: var(--bad);
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

.mr-label.is-cancel {
  opacity: 0.6;
}

.mr-label.is-cancel::after {
  animation: mr-strike 0.38s ease-out forwards;
}

.mr-label.is-cancel .mr-unit {
  color: var(--muted);
}

.mr-label.is-survivor .mr-unit,
.mr-label.is-survivor .mr-formula {
  color: var(--good);
}

.mr-label.is-survivor {
  animation: mr-pop 0.35s ease-out;
}

/* Instructions under the track */
.mr-howto {
  margin: 14px auto 8px;
  max-width: 52rem;
  color: var(--muted);
  font-size: 0.9375rem;
  text-align: center;
}

.mr-howto-keys {
  display: none;
}

@media (hover: hover) and (pointer: fine) {
  .mr-howto-keys {
    display: inline;
  }
}

/* ---------- Tile tray ---------- */

.mr-tray {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 6px auto 0;
  padding: 12px;
  max-width: 60rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.25);
}

.mr-tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 92px;
  padding: 8px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--glass-strong);
  color: var(--text);
  font: inherit;
  font-size: 1.0625rem;
  cursor: grab;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.35);
  transition: transform 0.12s ease, background-color 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
}

@media (hover: hover) {
  .mr-tile:hover {
    border-color: rgba(255, 255, 255, 0.45);
    background: rgba(255, 255, 255, 0.12);
  }
}

.mr-tile:active {
  transform: translateY(1px);
}

.mr-tile.is-picked {
  border-color: var(--teal);
  background: rgba(45, 212, 191, 0.2);
  box-shadow: 0 0 0 2px var(--teal), 0 8px 18px rgba(0, 0, 0, 0.4);
  transform: translateY(-3px);
}

.mr-tile.is-drag-source {
  opacity: 0.55;
}

.mr-board.is-dragging,
.mr-board.is-dragging .mr-tile,
.mr-board.is-dragging .mr-slot-btn {
  cursor: grabbing;
}

/* The tile that follows the pointer while dragging (moved with a CSS transform) */
.mr-ghost {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 100;
  pointer-events: none;
  will-change: transform;
}

.mr-ghost-inner {
  padding: 9px 16px;
  border: 2px solid var(--teal);
  border-radius: 12px;
  background: #10201e;
  color: var(--text);
  font-size: 1.0625rem;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.55);
  transform: translate(-50%, -50%) rotate(-2deg);
  white-space: nowrap;
}

.mr-ghost.is-touch .mr-ghost-inner {
  transform: translate(-50%, -135%) rotate(-2deg);
}

/* ---------- Actions, feedback, hints ---------- */

.mr-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 14px;
}

.mr-actions .btn-primary {
  min-width: 140px;
}

.mr-feedback {
  min-height: 1.5em;
  margin: 12px auto 0;
  max-width: 50rem;
  font-weight: 700;
  text-align: center;
}

.mr-feedback:empty {
  min-height: 0;
  margin: 0;
}

.mr-feedback.is-yes {
  color: var(--good);
}

.mr-feedback.is-no {
  color: var(--bad);
}

.mr-feedback.is-warn {
  color: var(--amber);
}

.mr-feedback.is-info {
  color: var(--violet);
}

.mr-hints {
  display: grid;
  gap: 6px;
  max-width: 50rem;
  margin: 10px auto 0;
  padding: 0;
  list-style: none;
}

.mr-hints li {
  padding: 8px 12px;
  border-left: 3px solid var(--bad);
  border-radius: 8px;
  background: var(--bad-soft);
  animation: mr-fade-in 0.25s ease-out;
}

.mr-hint-where {
  color: #fecdd3;
}

.mr-hints .mr-hint-more {
  border-left-color: var(--line-strong);
  background: var(--glass);
  color: var(--muted);
}

/* The reward: the worked solution */
.mr-worked {
  max-width: 50rem;
  margin: 14px auto 0;
  padding: 12px 18px;
  border: 1px solid rgba(52, 211, 153, 0.45);
  border-radius: 12px;
  background: var(--good-soft);
  animation: mr-fade-in 0.35s ease-out;
}

.mr-worked-title {
  margin: 0 0 4px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--good);
}

.mr-worked-steps {
  margin: 0 0 6px;
  padding-left: 0;
  list-style: none;
  color: var(--muted);
  font-size: 0.9375rem;
}

.mr-worked-n {
  color: var(--text);
  font-weight: 700;
}

.mr-worked-math {
  margin: 0 0 4px;
}

.mr-worked-rule {
  color: var(--muted);
}

.mr-worked-calc {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.mr-worked-answer {
  margin: 0;
  font-size: 1.0625rem;
}

.mr-worked-answer strong {
  color: var(--good);
  font-size: 1.15em;
}

/* ---------- Next bar (sticks to the bottom of the screen on phones) ---------- */

.mr-next-bar {
  position: sticky;
  bottom: 0;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 16px;
  margin-top: 14px;
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom, 0px));
  border: 1px solid rgba(52, 211, 153, 0.55);
  border-radius: 16px;
  background: #0c1714;
  box-shadow: 0 -12px 30px rgba(0, 0, 0, 0.55);
  animation: mr-rise 0.22s ease-out;
}

.mr-next-msg {
  margin: 0;
  font-weight: 700;
  color: var(--good);
}

.mr-next-bar.is-shown-answer {
  border-color: rgba(167, 139, 250, 0.6);
  background: #14121d;
}

.mr-next-bar.is-shown-answer .mr-next-msg {
  color: var(--violet);
}

@media (max-width: 599px) {
  .mr-next-bar {
    margin-left: calc(-1 * var(--gutter));
    margin-right: calc(-1 * var(--gutter));
    border-radius: 16px 16px 0 0;
  }

  .mr-next {
    flex: 1 1 100%;
  }
}

/* ---------- Balancing item ---------- */

.mr-bal-help {
  margin: 0;
  color: var(--muted);
  max-width: 46rem;
}

.mr-bal-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

@media (min-width: 860px) {
  .mr-bal-grid {
    grid-template-columns: minmax(0, 1fr) 15rem;
    align-items: start;
  }
}

.mr-bal-eq {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px 12px;
  padding: 4px 0 8px;
  font-size: clamp(1.3rem, 1.05rem + 1vw, 1.85rem);
}

.mr-bal-term {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mr-bal-eq .mr-eq-arrow {
  padding: 0 8px;
}

.mr-coef-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

.mr-step {
  width: 48px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--glass-strong);
  color: var(--text);
  font: 700 1.5rem/1 var(--sans);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

@media (hover: hover) {
  .mr-step:hover {
    background: rgba(255, 255, 255, 0.16);
  }
}

.mr-step:active {
  background: var(--teal-soft);
}

.mr-step:disabled {
  opacity: 0.3;
  cursor: default;
}

.mr-coef {
  width: 54px;
  height: 52px;
  padding: 0;
  border: 2px solid var(--teal);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font: 700 1.6rem/1 var(--sans);
  text-align: center;
  caret-color: var(--teal);
}

.mr-coef[readonly] {
  border-color: var(--line-strong);
}

.mr-board-balance.is-done .mr-coef {
  border-color: var(--good);
  color: var(--good);
}

.mr-counter {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.mr-counter caption {
  padding-bottom: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-align: left;
  text-transform: uppercase;
  color: var(--muted);
}

.mr-counter th,
.mr-counter td {
  padding: 5px 8px;
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.mr-counter thead th {
  font-size: 0.8125rem;
  color: var(--muted);
}

.mr-counter tbody th {
  font-family: var(--serif);
  text-align: left;
}

.mr-counter tr.is-equal td,
.mr-counter tr.is-equal th {
  color: var(--good);
}

.mr-counter tr.is-off .mr-counter-mark {
  color: var(--bad);
}

.mr-counter-mark {
  font-weight: 900;
}

/* ---------- Results ---------- */

.mr-results-card {
  max-width: 48rem;
  margin: 8px auto 0;
  padding: 24px 22px;
  text-align: center;
}

.mr-results-kicker {
  margin: 0 0 4px;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
}

.mr-results-title {
  margin: 0 0 6px;
  font-size: clamp(2rem, 1.6rem + 2vw, 2.75rem);
}

.mr-results-msg {
  color: var(--muted);
  font-size: 1.0625rem;
}

.mr-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 16px;
}

.mr-stat {
  padding: 12px 8px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--glass);
}

.mr-stat dt {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.mr-stat dd {
  margin: 2px 0 0;
  font-family: var(--sans);
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.mr-stat.is-best {
  border-color: var(--good);
  background: var(--good-soft);
}

.mr-stat.is-best dd {
  color: var(--good);
}

@media (max-width: 599px) {
  .mr-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mr-results-card {
    padding: 20px 14px;
  }
}

.mr-code-box {
  margin: 0 0 14px;
  padding: 12px 16px;
  border: 1px dashed var(--line-strong);
  border-radius: 12px;
}

.mr-code-line {
  margin: 0 0 4px;
  font-size: 1.125rem;
  font-weight: 700;
}

.mr-code-line .mr-code-tag {
  font-size: 1.2em;
}

.mr-code-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.mr-results-details {
  margin: 0 0 6px;
  border: 1px solid var(--line);
  border-radius: 12px;
  text-align: left;
}

.mr-results-list {
  margin: 0;
  padding: 0 14px 12px 2.4em;
}

.mr-result-row {
  padding: 6px 0;
  border-bottom: 1px solid var(--line);
}

.mr-result-row:last-child {
  border-bottom: 0;
}

.mr-result-text {
  margin-right: 8px;
}

.mr-result-tag {
  display: inline-block;
  padding: 0 8px;
  border-radius: 999px;
  background: var(--amber-soft);
  color: var(--amber);
  font-size: 0.8125rem;
  font-weight: 700;
  white-space: nowrap;
}

.mr-result-row.is-first .mr-result-tag {
  background: var(--good-soft);
  color: var(--good);
}

.mr-result-row.is-shown .mr-result-tag {
  background: var(--violet-soft);
  color: var(--violet);
}

.mr-results-actions {
  margin-top: 18px;
}

/* ---------- Phones ---------- */

@media (max-width: 599px) {
  .mr-work {
    padding: 14px 10px 12px;
  }

  .mr-track {
    gap: 26px 6px;
    font-size: 1rem;
  }

  .mr-seg {
    gap: 6px;
  }

  .mr-term {
    padding: 12px 10px;
  }

  .mr-slot-btn {
    min-width: 100px;
    padding: 8px 10px;
  }

  /* The tiles follow you down the page, so the equation and the molar masses can be
     scrolled into view while the tiles stay in reach. They never cover the buttons
     below them (a sticky box rests in its normal place once that is on screen). */
  .mr-tray {
    position: sticky;
    bottom: calc(8px + env(safe-area-inset-bottom, 0px));
    z-index: 6;
    gap: 6px 8px;
    padding: 8px;
    border-color: var(--line-strong);
    background: #0d1114;
    box-shadow: 0 -10px 22px rgba(0, 0, 0, 0.55);
  }

  /* Keep a box you tab to from hiding behind the tiles (or the Next bar). */
  html {
    scroll-padding-bottom: 190px;
  }

  .mr-tile {
    min-width: 0;
    min-height: 44px;
    padding: 6px 12px;
    font-size: 1rem;
  }

  .mr-start-btn {
    flex: 1 1 100%;
  }

  .mr-hero-icon {
    width: 54px;
    height: 54px;
  }
}

/* ---------- Keyframes ---------- */

@keyframes mr-strike {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

@keyframes mr-pop {
  0% {
    transform: scale(0.9);
  }
  60% {
    transform: scale(1.06);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes mr-shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-4px);
  }
  75% {
    transform: translateX(4px);
  }
}

@keyframes mr-fade-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes mr-glow {
  from {
    box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.6);
  }
  to {
    box-shadow: 0 0 0 12px rgba(52, 211, 153, 0);
  }
}

@keyframes mr-rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Reduced motion: no movement at all (site.css also shortens every animation). */
@media (prefers-reduced-motion: reduce) {
  .mr-slot.is-bad .mr-slot-btn,
  .mr-slot.is-pop .mr-slot-btn,
  .mr-label.is-survivor,
  .mr-mark,
  .mr-next-bar,
  .mr-answer.is-done,
  .mr-hints li,
  .mr-worked,
  .mr-slot .mr-num.is-shown {
    animation: none !important;
  }

  .mr-label.is-cancel::after {
    animation: none !important;
    transform: scaleX(1);
  }

  .mr-tile.is-picked,
  .mr-tile:active {
    transform: none;
  }

  .mr-ghost-inner {
    transform: translate(-50%, -50%);
  }

  .mr-ghost.is-touch .mr-ghost-inner {
    transform: translate(-50%, -135%);
  }
}

/* =====================================================================
   Online races (js/online/): nickname, lobby, room, countdown, race
   standings and race results. Everything here is new; the practice and
   race-code screens above are unchanged.
   ===================================================================== */

.mr-online-btn {
  border-color: rgba(167, 139, 250, 0.55);
  background: var(--violet-soft);
}

.mr-online-btn:hover {
  border-color: var(--violet);
  background: rgba(167, 139, 250, 0.24);
}

.mr-howto-check {
  margin: 12px 0 0;
}

.mr-howto-check a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-weight: 700;
}

.mr-howto-check span {
  color: var(--muted);
  font-size: 0.9375rem;
}

.mr-field-help {
  margin: 4px 0 10px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.mr-field-help strong,
.mr-field-help b {
  color: var(--text);
}

.mr-input.mr-input-text {
  font: 700 1.125rem/1.2 var(--sans);
  letter-spacing: 0;
  text-transform: none;
}

.mr-online-card {
  padding: 16px 18px;
}

.mr-card-title {
  margin: 0;
  font-size: 1.25rem;
}

.mr-online-notice,
.mr-online-alert {
  margin: 0 0 14px;
  padding: 12px 16px;
}

.mr-online-notice {
  border-color: rgba(251, 191, 36, 0.5);
  color: var(--text);
}

.mr-online-alert {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 16px;
  border-color: rgba(251, 113, 133, 0.55);
}

.mr-online-alert-text {
  flex: 1 1 18rem;
  margin: 0;
  font-weight: 600;
}

.mr-online-alert-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.mr-nick-form {
  max-width: 34rem;
}

/* ---------- Lobby ---------- */

.mr-lobby-me {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 10px;
  margin: 0 0 0 auto;
  color: var(--muted);
}

.mr-lobby-me strong {
  color: var(--text);
}

.mr-lobby-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.mr-lobby-side {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.mr-lobby-grid > *,
.mr-lobby-side > * {
  min-width: 0;
}

@media (min-width: 900px) {
  .mr-lobby-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  }
}

.mr-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 12px;
  margin-bottom: 8px;
}

.mr-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--amber);
}

.mr-live::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

.mr-live[data-state="live"] {
  color: var(--good);
}

.mr-live[data-state="error"] {
  color: var(--bad);
}

.mr-open-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mr-open-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 6px 12px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.mr-open-row:first-child {
  border-top: 0;
}

.mr-open-main {
  min-width: 0;
}

.mr-open-host {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 8px;
  margin: 0;
  font-weight: 700;
  font-size: 1.0625rem;
}

.mr-open-hostname {
  overflow-wrap: anywhere;
}

.mr-open-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.875rem;
}

.mr-open-spots {
  font-size: 0.9375rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.mr-open-row.is-full .mr-open-spots {
  color: var(--muted);
}

.mr-open-join {
  min-width: 84px;
}

.mr-open-empty {
  margin: 8px 0 4px;
  padding: 14px;
  border: 1px dashed var(--line-strong);
  border-radius: 12px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 420px) {
  .mr-open-row {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .mr-open-spots {
    grid-column: 1;
    grid-row: 2;
    font-size: 0.875rem;
    color: var(--muted);
  }

  .mr-open-join {
    grid-column: 2;
    grid-row: 1 / span 2;
  }
}

/* Create form: radio "pills" (the real radio sits on top, invisible, so it keeps keyboard focus) */

.mr-choice {
  margin: 0 0 12px;
  padding: 0;
  border: 0;
  min-width: 0;
}

.mr-choice-legend {
  margin: 0 0 6px;
  padding: 0;
  font-weight: 700;
}

.mr-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.mr-pill {
  position: relative;
  display: inline-flex;
}

.mr-pill input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.mr-pill-face {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 8px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--glass);
  font-weight: 700;
  line-height: 1.2;
}

.mr-pill-face small {
  color: var(--muted);
  font-size: 0.8125rem;
  font-weight: 600;
}

.mr-pill input:checked + .mr-pill-face {
  border-color: var(--teal);
  background: var(--teal-soft);
  box-shadow: inset 0 0 0 1px var(--teal);
}

.mr-pill input:focus-visible + .mr-pill-face {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.mr-pill input:disabled {
  cursor: not-allowed;
}

.mr-pill input:disabled + .mr-pill-face {
  border-style: dashed;
  color: var(--muted);
  opacity: 0.6;
}

@media (hover: hover) {
  .mr-pill input:not(:disabled):not(:checked):hover + .mr-pill-face {
    background: var(--glass-strong);
  }
}

.mr-create .mr-card-title {
  margin-bottom: 10px;
}

.mr-create-fixed {
  margin: 0 0 14px;
  color: var(--muted);
}

.mr-create-fixed strong {
  color: var(--text);
}

.mr-create-go {
  width: 100%;
}

/* ---------- Tags shared by the online screens ---------- */

.mr-sp-you {
  display: inline-block;
  padding: 0 8px;
  border-radius: 999px;
  background: var(--teal);
  color: var(--on-accent);
  font-size: 0.75rem;
  font-weight: 800;
  line-height: 1.5;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.mr-tag {
  display: inline-block;
  padding: 0 8px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.5;
  white-space: nowrap;
}

.mr-tag-host {
  border-color: rgba(251, 191, 36, 0.55);
  color: var(--amber);
}

.mr-tag-away {
  border-style: dashed;
}

[data-team="A"] .mr-tag:not(.mr-tag-host):not(.mr-tag-away) {
  border-color: rgba(45, 212, 191, 0.55);
  color: var(--teal);
}

[data-team="B"] .mr-tag:not(.mr-tag-host):not(.mr-tag-away) {
  border-color: rgba(167, 139, 250, 0.6);
  color: var(--violet);
}

/* ---------- Room ---------- */

.mr-room-card {
  display: grid;
  gap: 16px 24px;
  padding: 18px;
}

@media (min-width: 820px) {
  .mr-room-card {
    grid-template-columns: minmax(15rem, 19rem) minmax(0, 1fr);
    align-items: start;
  }
}

.mr-room-codebox {
  padding: 14px 16px 12px;
  border: 1px dashed rgba(251, 191, 36, 0.55);
  border-radius: 14px;
  background: var(--amber-soft);
  text-align: center;
}

.mr-room-codelabel {
  margin: 0;
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
}

.mr-room-code {
  margin: 2px 0 4px;
  font: 800 clamp(2.75rem, 2rem + 4vw, 4rem) / 1.05 ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  letter-spacing: 0.16em;
  color: var(--text);
  overflow-wrap: anywhere;
}

.mr-room-codebox .mr-field-help {
  margin: 0;
}

.mr-room-info {
  margin: 0 0 10px;
  font-weight: 700;
}

.mr-spots {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.mr-spot {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 50px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--glass);
}

.mr-spot.is-me {
  border-color: rgba(45, 212, 191, 0.6);
  background: var(--teal-soft);
}

.mr-spot.is-open {
  border-style: dashed;
  background: transparent;
  color: var(--muted);
}

.mr-spot.is-away {
  opacity: 0.65;
}

.mr-spot-num {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.875rem;
  font-weight: 800;
}

.mr-spot-name {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 8px;
  min-width: 0;
  font-weight: 700;
}

.mr-spot.is-open .mr-spot-name {
  font-weight: 600;
}

.mr-spot-nametext {
  overflow-wrap: anywhere;
}

.mr-teams {
  display: grid;
  gap: 12px;
}

@media (min-width: 560px) {
  .mr-teams {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.mr-team {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.mr-team[data-team="A"] {
  border-color: rgba(45, 212, 191, 0.45);
}

.mr-team[data-team="B"] {
  border-color: rgba(167, 139, 250, 0.5);
}

.mr-team-title {
  margin: 0 0 8px;
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 800;
}

.mr-team[data-team="A"] .mr-team-title {
  color: var(--teal);
}

.mr-team[data-team="B"] .mr-team-title {
  color: var(--violet);
}

.mr-room-status {
  min-height: 1.5em;
  margin: 12px 0 0;
  color: var(--muted);
  font-weight: 600;
}

.mr-room-status:empty {
  min-height: 0;
  margin: 0;
}

.mr-room-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin-top: 14px;
}

.mr-room-actions .mr-field-help {
  flex: 1 1 14rem;
  margin: 0;
}

@media (max-width: 599px) {
  .mr-room-actions .btn-lg {
    width: 100%;
  }
}

/* ---------- Countdown ---------- */

.mr-cd-card {
  max-width: 40rem;
  margin: 8px auto 0;
  padding: 24px 20px 22px;
  text-align: center;
}

.mr-cd-title {
  margin: 0;
  font-size: clamp(1.5rem, 1.25rem + 1.2vw, 2rem);
}

.mr-cd-num {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 1.25em;
  margin: 6px 0 10px;
  font-family: var(--sans);
  font-size: clamp(5rem, 3rem + 12vw, 9rem);
  font-weight: 900;
  line-height: 1;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.mr-cd-num.is-ready {
  font-size: clamp(2.25rem, 1.75rem + 3vw, 3.25rem);
  color: var(--muted);
}

.mr-cd-num.is-go {
  color: var(--good);
}

.mr-cd-num.is-pop {
  animation: mr-cd-pop 0.45s ease-out;
}

@keyframes mr-cd-pop {
  0% {
    transform: scale(0.6);
    opacity: 0.2;
  }
  60% {
    transform: scale(1.08);
    opacity: 1;
  }
  100% {
    transform: scale(1);
  }
}

.mr-cd-note {
  margin: 0 0 12px;
  color: var(--muted);
}

.mr-cd-racers {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.mr-cd-racer {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass);
  font-weight: 700;
}

.mr-cd-racer.is-me {
  border-color: rgba(45, 212, 191, 0.6);
}

/* ---------- Race: standings next to the questions ---------- */

.mr-play:not(.is-online) .mr-race-side,
.mr-play:not(.is-online) .mr-leave-confirm {
  display: none;
}

.mr-race-side {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0 0 12px;
}

.mr-race-side .mr-sp {
  order: -1;
}

@media (min-width: 1100px) {
  .mr-play.is-online {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 22rem;
    grid-template-areas:
      "hud side"
      "leave side"
      "stage side"
      "next side";
    grid-template-rows: auto auto auto 1fr;
    column-gap: 20px;
    align-items: start;
  }

  .mr-play.is-online > .mr-hud {
    grid-area: hud;
  }

  .mr-play.is-online > .mr-leave-confirm {
    grid-area: leave;
  }

  .mr-play.is-online > .mr-stage {
    grid-area: stage;
  }

  .mr-play.is-online > .mr-next-bar {
    grid-area: next;
  }

  .mr-play.is-online > .mr-race-side {
    grid-area: side;
    position: sticky;
    top: 12px;
    margin: 4px 0 0;
  }
}

.mr-race-sync {
  margin: 0;
  padding: 8px 12px;
  border: 1px solid rgba(251, 191, 36, 0.5);
  border-radius: 12px;
  background: var(--amber-soft);
  color: var(--amber);
  font-size: 0.875rem;
  font-weight: 600;
}

.mr-leave-confirm {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  margin: 0 0 12px;
  padding: 10px 14px;
  border-color: rgba(251, 191, 36, 0.55);
}

.mr-leave-text {
  flex: 1 1 16rem;
  margin: 0;
  font-weight: 600;
}

.mr-leave-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.mr-sp {
  padding: 10px 12px 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg-raised);
}

.mr-sp-title {
  margin: 0 0 8px;
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Canvas dimensions are CSS pixels; the renderer caps its backing-store DPR. */
.mr-race-canvas {
  display: block;
  width: 100%;
  height: 460px;
  border-radius: 10px;
}

.mr-sp .race-summary,
.mr-race-away {
  margin: 10px 0 0;
  font-size: 0.875rem;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.mr-race-side,
.mr-play > .mr-stage {
  min-width: 0;
}

/* Question subpanels stack when the track occupies the desktop sidebar. */
@media (min-width: 1100px) {
  .mr-play.is-online .mr-q,
  .mr-play.is-online .mr-bal-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

#mr-cpu-settings > .mr-section-title,
#mr-cpu-countdown > .mr-section-title,
#mr-cpu-results > .mr-section-title {
  margin-bottom: 16px;
}

#mr-cpu-settings > .btn {
  margin-bottom: 12px;
}

#mr-cpu-wait .mr-sp {
  max-width: 52rem;
}

/* ---------- Race results ---------- */

.mr-rr-teams {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 14px;
}

.mr-rr-team {
  padding: 12px 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--glass);
}

.mr-rr-team.is-top {
  border-color: rgba(251, 191, 36, 0.6);
  background: var(--amber-soft);
}

.mr-rr-team p {
  margin: 0;
}

.mr-rr-team-place {
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.mr-rr-team.is-top .mr-rr-team-place {
  color: var(--amber);
}

.mr-rr-team-name {
  font-size: 1.25rem;
  font-weight: 800;
}

.mr-rr-team[data-team="A"] .mr-rr-team-name {
  color: var(--teal);
}

.mr-rr-team[data-team="B"] .mr-rr-team-name {
  color: var(--violet);
}

.mr-rr-team-score {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.mr-rr-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 6px;
  text-align: left;
}

.mr-rr-row {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 4px 12px;
  min-height: 50px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--glass);
}

.mr-rr-row.is-me {
  border-color: rgba(45, 212, 191, 0.6);
  background: var(--teal-soft);
}

.mr-rr-place {
  font-size: 1.125rem;
  font-weight: 900;
  color: var(--muted);
}

.mr-rr-row:first-child .mr-rr-place {
  color: var(--amber);
}

.mr-rr-name {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 8px;
  min-width: 0;
  font-weight: 700;
}

.mr-rr-steps {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.mr-rr-result {
  color: var(--muted);
  font-size: 0.875rem;
  white-space: nowrap;
}

.mr-rr-row.is-done .mr-rr-result {
  color: var(--good);
}

@media (max-width: 599px) {
  .mr-rr-row {
    grid-template-columns: 2.5rem minmax(0, 1fr) auto;
    padding: 8px 10px;
  }

  .mr-rr-result {
    grid-column: 2 / -1;
    white-space: normal;
  }
}

/* ---------- Online: phones ---------- */

@media (max-width: 599px) {
  .mr-lobby-me {
    margin-left: 0;
    flex-basis: 100%;
  }

  .mr-online-card {
    padding: 14px;
  }
}

/* ---------- Online: reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  .mr-cd-num.is-pop {
    animation: none !important;
  }

  .mr-sp-fill {
    transition: none !important;
  }
}