:root {
  --blue: #1747d1;
  --blue-dark: #102a68;
  --sky: #dff4ff;
  --paper: #fffefa;
  --sun: #ffd85a;
  --coral: #ff7058;
  --mint: #46cfa2;
  --ink: #17213d;
  --muted: #69718a;
  --line: #d9e4f0;
  --shadow: 0 18px 50px rgba(28, 62, 125, 0.14);
  font-family: "Trebuchet MS", "Avenir Next", Avenir, system-ui, sans-serif;
  color: var(--ink);
  background: var(--sky);
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--sky);
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 8% 18%, rgba(255, 255, 255, 0.92) 0 4.5rem, transparent 4.6rem),
    radial-gradient(circle at 92% 24%, rgba(255, 255, 255, 0.72) 0 6rem, transparent 6.1rem),
    linear-gradient(180deg, #d9f3ff 0, #effaff 52%, #f8fcff 100%);
  overflow-x: hidden;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 4px solid rgba(255, 112, 88, 0.5);
  outline-offset: 3px;
}

.topbar {
  width: min(1180px, calc(100% - 32px));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--blue-dark);
  text-decoration: none;
  font-size: clamp(1.2rem, 2.5vw, 1.65rem);
  font-weight: 900;
  letter-spacing: -0.04em;
}

.brand em {
  color: var(--coral);
  font-style: normal;
  font-weight: 700;
}

.brand-paw {
  width: 42px;
  height: 42px;
  border-radius: 14px 18px 17px 19px;
  display: grid;
  place-items: center;
  color: var(--sun);
  background: var(--blue);
  box-shadow: 0 5px 0 var(--blue-dark);
}

.player-strip {
  display: flex;
  align-items: center;
  gap: 10px;
}

.player-name,
.score-pill,
.icon-button {
  min-height: 44px;
  border: 2px solid rgba(23, 71, 209, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 5px 0 rgba(23, 71, 209, 0.08);
}

.player-name,
.score-pill {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 14px;
  font-weight: 800;
}

.score-pill {
  min-width: 72px;
  justify-content: center;
}

.icon-button {
  width: 46px;
  padding: 0;
  cursor: pointer;
  font-size: 1.15rem;
}

.lesson-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 12px auto 24px;
}

.trail {
  min-height: 70px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 12px 24px;
  color: white;
  background: var(--blue-dark);
  border-radius: 24px 24px 0 0;
}

.trail-title {
  font-size: 1rem;
  font-weight: 900;
  color: var(--sun);
}

.trail ol {
  display: flex;
  justify-content: space-between;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.trail ol::before {
  content: "";
  position: absolute;
  top: 16px;
  left: 8%;
  right: 8%;
  height: 3px;
  background: rgba(255, 255, 255, 0.22);
}

.trail li {
  flex: 1;
}

.trail li {
  display: grid;
  justify-items: center;
  gap: 4px;
  z-index: 1;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.75rem;
}

.trail li span {
  width: 34px;
  height: 34px;
  border: 3px solid var(--blue-dark);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--blue-dark);
  background: #7182ac;
  font-weight: 900;
}

.trail li.is-active,
.trail li.is-done {
  color: white;
}

.trail li.is-active span {
  background: var(--sun);
  box-shadow: 0 0 0 4px rgba(255, 216, 90, 0.22);
}

.trail li.is-done span {
  background: var(--mint);
}

.best-score {
  white-space: nowrap;
  font-size: 0.86rem;
  color: rgba(255, 255, 255, 0.72);
}

.best-score b {
  color: white;
}

.game-board {
  min-height: 650px;
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(420px, 1.45fr);
  background: var(--paper);
  border-radius: 0 0 30px 30px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.vincent-stage {
  position: relative;
  min-height: 650px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  background:
    radial-gradient(circle at 50% 62%, rgba(255, 216, 90, 0.7) 0 7rem, transparent 7.1rem),
    linear-gradient(153deg, #2f63eb 0%, #1747d1 72%);
  overflow: hidden;
}

.vincent-stage::after {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: -55px;
  height: 150px;
  border-radius: 50% 50% 0 0;
  background: #10379e;
}

.speech {
  position: absolute;
  z-index: 3;
  top: 34px;
  left: 24px;
  right: 24px;
  padding: 20px 22px 17px;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  border: 3px solid var(--blue-dark);
  border-radius: 24px 24px 24px 6px;
  box-shadow: 8px 8px 0 rgba(16, 42, 104, 0.22);
}

.speech::after {
  content: "";
  position: absolute;
  left: 20px;
  bottom: -17px;
  width: 23px;
  height: 23px;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  border-right: 3px solid var(--blue-dark);
  border-bottom: 3px solid var(--blue-dark);
  transform: skewY(38deg);
}

.speech p {
  margin: 0 0 11px;
  font-size: clamp(1rem, 1.7vw, 1.14rem);
  font-weight: 800;
  line-height: 1.38;
}

.speak-button {
  border: 0;
  padding: 0;
  color: var(--blue);
  background: transparent;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 900;
}

.speak-button span {
  display: inline-grid;
  width: 24px;
  height: 24px;
  margin-right: 4px;
  place-items: center;
  color: white;
  background: var(--blue);
  border-radius: 50%;
  font-size: 0.65rem;
}

.vincent-image {
  position: relative;
  z-index: 2;
  width: min(104%, 420px);
  height: auto;
  max-height: 455px;
  object-fit: contain;
  object-position: bottom center;
  filter: drop-shadow(0 18px 18px rgba(3, 24, 83, 0.28));
  transition: opacity 180ms ease, transform 180ms ease;
}

.vincent-image.is-changing {
  opacity: 0;
  transform: translateY(10px) scale(0.98);
}

.vincent-tag {
  position: absolute;
  z-index: 4;
  left: 22px;
  bottom: 20px;
  display: grid;
  padding: 9px 14px;
  background: var(--sun);
  border: 3px solid var(--blue-dark);
  border-radius: 14px;
  box-shadow: 5px 5px 0 var(--blue-dark);
  transform: rotate(-2deg);
}

.vincent-tag b {
  font-size: 1.02rem;
}

.vincent-tag span {
  font-size: 0.72rem;
  font-weight: 800;
}

.activity-panel {
  min-width: 0;
  padding: clamp(32px, 5vw, 64px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  margin-bottom: 14px;
  padding: 7px 11px;
  color: var(--blue-dark);
  background: #e7efff;
  border-radius: 10px;
  font-weight: 900;
  font-size: 0.86rem;
}

h1,
h2 {
  margin: 0;
  color: var(--blue-dark);
  letter-spacing: -0.045em;
  line-height: 1.04;
}

h1 {
  max-width: 620px;
  font-size: clamp(2.4rem, 6.2vw, 4.9rem);
}

h2 {
  font-size: clamp(2rem, 4.4vw, 3.4rem);
}

.lead {
  max-width: 650px;
  margin: 20px 0 26px;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.55;
}

.primary-button,
.secondary-button,
.answer-button,
.sort-card,
.sort-zone {
  border: 0;
  cursor: pointer;
}

.primary-button,
.secondary-button {
  min-height: 54px;
  border-radius: 16px;
  padding: 0 22px;
  font-weight: 900;
}

.primary-button {
  width: fit-content;
  color: white;
  background: var(--coral);
  box-shadow: 0 7px 0 #c9402f;
  font-size: 1.08rem;
}

.primary-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 0 #c9402f;
}

.primary-button:active {
  transform: translateY(5px);
  box-shadow: 0 2px 0 #c9402f;
}

.secondary-button {
  color: var(--blue);
  background: #e9efff;
}

.mini-features {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 2px 0 30px;
}

.mini-features span {
  padding: 8px 12px;
  border: 2px solid var(--line);
  border-radius: 999px;
  font-weight: 800;
  font-size: 0.88rem;
}

.rule-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin: 24px 0 26px;
}

.rule-sheet {
  position: relative;
  padding: 20px;
  border: 3px solid var(--blue-dark);
  border-radius: 18px 18px 18px 4px;
  background: white;
  box-shadow: 6px 6px 0 #dfe8ff;
}

.rule-sheet.is-now {
  border-color: #0b8061;
  box-shadow: 6px 6px 0 #d8f5eb;
}

.rule-sheet h3 {
  margin: 0 0 10px;
  font-size: 1.22rem;
}

.rule-sheet p {
  margin: 0 0 12px;
  line-height: 1.4;
}

.formula {
  width: fit-content;
  margin: 12px 0;
  padding: 8px 10px;
  color: white;
  background: var(--blue-dark);
  border-radius: 9px;
  font-weight: 900;
}

.is-now .formula {
  background: #0b8061;
}

.signal-words {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 14px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
}

.signal-words span {
  white-space: nowrap;
}

.example-line {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  font-weight: 800;
}

.tiny-audio {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  color: white;
  background: var(--blue);
  cursor: pointer;
}

.question-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin: 18px 0;
  color: var(--muted);
  font-weight: 800;
}

.streak {
  color: #c9402f;
}

.question-card {
  padding: clamp(20px, 4vw, 32px);
  border: 3px solid var(--blue-dark);
  border-radius: 22px 22px 22px 6px;
  background: #fafdff;
  box-shadow: 8px 8px 0 #dce8ff;
}

.question-card p {
  margin: 0;
  font-size: clamp(1.2rem, 2.5vw, 1.65rem);
  font-weight: 900;
  line-height: 1.35;
}

.clue {
  display: inline-block;
  padding: 0 4px;
  color: #9b2f22;
  background: #ffe3dc;
  border-radius: 6px;
}

.question-card .clue-hint {
  margin: 10px 0 0;
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--muted);
}

.formula small {
  display: block;
  margin-top: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  opacity: 0.85;
}

.sort-card small {
  display: block;
  margin-top: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  opacity: 0.75;
}

.answer-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.answer-button {
  min-height: 58px;
  padding: 12px 16px;
  color: var(--blue-dark);
  background: white;
  border: 3px solid #b9caef;
  border-radius: 15px;
  font-size: 1.03rem;
  font-weight: 900;
  text-align: left;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
}

.answer-button:hover {
  transform: translateY(-2px);
  border-color: var(--blue);
}

.answer-button.is-correct {
  color: #075440;
  border-color: var(--mint);
  background: #e5fbf4;
}

.answer-button.is-wrong {
  color: #8c2a1f;
  border-color: var(--coral);
  background: #fff0ed;
  animation: shake 240ms linear;
}

.feedback {
  min-height: 34px;
  margin: 15px 0 0;
  color: var(--muted);
  font-weight: 800;
  line-height: 1.4;
}

.feedback.good {
  color: #087356;
}

.feedback.bad {
  color: #a73528;
}

.sort-instruction {
  margin: 16px 0;
  color: var(--muted);
  line-height: 1.5;
}

.sort-card {
  min-height: 68px;
  padding: 14px 18px;
  border: 3px solid var(--blue-dark);
  border-radius: 17px;
  color: var(--blue-dark);
  background: white;
  box-shadow: 5px 5px 0 #dfe8ff;
  font-size: 1.22rem;
  font-weight: 900;
}

.sort-card.is-selected {
  color: white;
  background: var(--blue);
  transform: rotate(-1deg) translateY(-2px);
  box-shadow: 6px 8px 0 #a8bdec;
}

.sort-zones {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 22px;
}

.sort-zone {
  min-height: 122px;
  padding: 16px;
  border: 3px dashed #8ca5dc;
  border-radius: 19px;
  color: var(--blue-dark);
  background: #eef3ff;
  text-align: left;
}

.sort-zone[data-zone="continuous"] {
  color: #075440;
  border-color: #54bc9c;
  background: #e7faf3;
}

.sort-zone b,
.sort-zone span {
  display: block;
}

.sort-zone b {
  font-size: 1.06rem;
}

.sort-zone span {
  margin-top: 6px;
  font-size: 0.86rem;
  opacity: 0.72;
}

.sorted-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 38px;
  margin-top: 14px;
}

.sorted-chip {
  padding: 6px 9px;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.9);
  font-size: 0.82rem;
  font-weight: 900;
}

.final-progress {
  height: 12px;
  margin: 18px 0 24px;
  border-radius: 99px;
  background: #dce5f7;
  overflow: hidden;
}

.final-progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--mint), #18ad7d);
  transition: width 300ms ease;
}

.result-badge {
  width: 150px;
  height: 150px;
  margin-bottom: 22px;
  display: grid;
  place-items: center;
  border: 6px solid var(--blue-dark);
  border-radius: 50%;
  color: var(--blue-dark);
  background: var(--sun);
  box-shadow: 9px 9px 0 #dce8ff;
  transform: rotate(-4deg);
  text-align: center;
}

.result-badge span {
  display: block;
  font-size: 2.5rem;
}

.result-badge b {
  font-size: 1rem;
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

footer {
  width: min(1180px, calc(100% - 32px));
  min-height: 62px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: var(--blue-dark);
  font-size: 0.87rem;
  font-weight: 800;
}

footer .credit {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

footer .credit b {
  color: var(--blue-dark);
  font-weight: 800;
}

footer .credit:hover {
  text-decoration: underline;
}

footer button {
  border: 0;
  color: var(--blue);
  background: transparent;
  cursor: pointer;
  font-weight: 900;
}

.sky-confetti {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  overflow: hidden;
}

.confetti-piece {
  position: absolute;
  top: -30px;
  width: 12px;
  height: 18px;
  border-radius: 3px;
  animation: confetti-fall 1.8s cubic-bezier(0.2, 0.7, 0.4, 1) forwards;
}

@keyframes confetti-fall {
  to {
    transform: translate(var(--drift), 110vh) rotate(720deg);
  }
}

@keyframes shake {
  25% { transform: translateX(-6px); }
  50% { transform: translateX(6px); }
  75% { transform: translateX(-3px); }
}

@media (max-width: 880px) {
  .trail {
    grid-template-columns: 1fr auto;
  }

  .trail-title {
    display: none;
  }

  .trail ol {
    order: 1;
  }

  .best-score {
    order: 2;
  }

  .trail li b {
    display: none;
  }

  .game-board {
    grid-template-columns: 1fr;
  }

  .vincent-stage {
    min-height: 380px;
  }

  .vincent-image {
    width: 260px;
    max-height: 300px;
    margin-left: 42%;
  }

  .speech {
    right: 38%;
  }

  .activity-panel {
    min-height: 520px;
  }
}

@media (max-width: 590px) {
  .topbar,
  .lesson-shell,
  footer {
    width: min(100% - 20px, 1180px);
  }

  footer {
    flex-wrap: wrap;
    row-gap: 6px;
    padding: 8px 0;
  }

  footer .credit {
    order: 3;
    width: 100%;
    margin-left: 0;
    text-align: center;
  }

  .topbar {
    min-height: 66px;
  }

  .brand span:last-child {
    font-size: 1.1rem;
  }

  .brand em {
    display: none;
  }

  .brand-paw {
    width: 38px;
    height: 38px;
  }

  .player-name {
    display: none;
  }

  .trail {
    min-height: 58px;
    padding: 10px 12px;
    gap: 8px;
    border-radius: 18px 18px 0 0;
  }

  .trail ol::before {
    top: 14px;
  }

  .trail li span {
    width: 30px;
    height: 30px;
    font-size: 0.8rem;
  }

  .best-score {
    font-size: 0.7rem;
  }

  .game-board {
    border-radius: 0 0 22px 22px;
  }

  .vincent-stage {
    min-height: 355px;
  }

  .speech {
    top: 20px;
    left: 15px;
    right: 30%;
    padding: 15px 16px 13px;
  }

  .speech p {
    font-size: 0.94rem;
  }

  .vincent-image {
    width: 230px;
    max-height: 265px;
    margin-left: 38%;
  }

  .vincent-tag {
    left: 14px;
    bottom: 15px;
  }

  .activity-panel {
    min-height: 540px;
    padding: 30px 20px 36px;
  }

  .rule-grid,
  .answer-grid,
  .sort-zones,
  .sort-zones[data-count="3"],
  .sort-zones[data-count="4"],
  .lesson-map {
    grid-template-columns: 1fr;
  }

  .answer-button {
    text-align: center;
  }

  .story-text {
    font-size: 1.05rem;
  }

  .result-badge {
    width: 124px;
    height: 124px;
  }
}

/* ---------- multi-lesson notebook: added for js/engine/* ---------- */

.player-name {
  cursor: pointer;
}

.player-name:hover,
.player-name:focus-visible {
  border-color: rgba(23, 71, 209, 0.35);
}

.total-pill {
  background: linear-gradient(160deg, #fff6d9, #ffe6c2);
  border-color: rgba(201, 130, 15, 0.35);
  color: #8a5a05;
}

/* speech bubble: EN line + smaller muted RU line */
.speech-en {
  display: block;
}

.speech-ru {
  display: block;
  margin-top: 5px;
  font-size: 0.82em;
  font-weight: 700;
  color: var(--muted);
}

.speech-ru:only-child {
  margin-top: 0;
  color: inherit;
  font-size: 1em;
  font-weight: 800;
}

/* welcome screen */
.welcome-form {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 6px 0 16px;
}

.welcome-form input {
  flex: 1 1 220px;
  min-height: 54px;
  padding: 0 18px;
  border: 3px solid #b9caef;
  border-radius: 15px;
  color: var(--blue-dark);
  background: white;
  font-size: 1.15rem;
  font-weight: 800;
}

.welcome-form input:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(23, 71, 209, 0.18);
}

.welcome-skip {
  color: var(--muted);
  font-weight: 800;
  text-decoration: underline;
}

/* map screen */
.map-score-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 4px 0 26px;
  color: var(--blue-dark);
  font-weight: 900;
}

.lesson-map {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.lesson-card {
  display: flex;
  flex-direction: column;
  padding: 18px;
  border: 3px solid var(--blue-dark);
  border-radius: 20px 20px 20px 6px;
  background: white;
  box-shadow: 7px 7px 0 #dfe8ff;
}

.lesson-card-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.lesson-card-kicker {
  width: fit-content;
  padding: 4px 10px;
  color: var(--blue-dark);
  background: #e7efff;
  border-radius: 999px;
  font-weight: 900;
  font-size: 0.78rem;
}

.lesson-card h3 {
  margin: 4px 0 0;
  font-size: 1.28rem;
  color: var(--blue-dark);
  letter-spacing: -0.03em;
}

.lesson-card-grammar {
  margin: 0;
  color: var(--muted);
  font-weight: 700;
  font-size: 0.92rem;
}

.lesson-card-meta {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.stars {
  margin: 8px 0 0;
  color: var(--sun);
  font-size: 1.3rem;
  letter-spacing: 2px;
  text-shadow: 0 1px 0 rgba(23, 71, 209, 0.25);
}

.lesson-card-best {
  margin: 2px 0 12px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.lesson-card .primary-button {
  margin-top: auto;
  width: 100%;
  text-align: center;
}

/* rule screen extras */
.rule-note {
  margin: 18px 0 22px;
  padding: 16px 18px;
  border: 3px solid #b9caef;
  border-radius: 16px;
  background: #eef3ff;
  color: var(--blue-dark);
  font-weight: 700;
  line-height: 1.5;
}

.rule-sheet.is-neutral {
  border-color: #6b53c9;
  box-shadow: 6px 6px 0 #e7e0fb;
}

.is-neutral .formula {
  background: #6b53c9;
}

/* illustrations: png with emoji fallback (see js/engine/illustrations.js) */
.illus {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex: 0 0 auto;
}

.illus img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.illus-emoji {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  font-style: normal;
  background: linear-gradient(160deg, #eef3ff, #dce8ff);
  border-radius: 18px;
}

.item-image {
  width: 100%;
  max-width: 220px;
  height: 140px;
  margin: 0 0 16px;
  border-radius: 18px;
}

.item-image .illus-emoji {
  font-size: 3.6rem;
}

.lesson-card .cover {
  width: 100%;
  height: 150px;
  margin-bottom: 10px;
  border-radius: 18px;
}

.lesson-card .cover .illus-emoji {
  font-size: 2.6rem;
  border-radius: 18px;
}

.sticker-image {
  width: 160px;
  height: 160px;
  margin: 0 auto 14px;
  border-radius: 50%;
}

.sticker-image .illus-emoji {
  font-size: 3.4rem;
  border-radius: 50%;
  background: linear-gradient(160deg, #fff6d9, #ffe6c2);
}

/* type-answer stage */
.type-form {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.type-input {
  flex: 1 1 220px;
  min-height: 54px;
  padding: 0 16px;
  border: 3px solid #b9caef;
  border-radius: 15px;
  color: var(--blue-dark);
  background: white;
  font-size: 1.1rem;
  font-weight: 800;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

.type-input:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(23, 71, 209, 0.18);
}

.type-input:disabled {
  opacity: 0.75;
}

.type-form .primary-button {
  flex: 0 0 auto;
}

.type-input mark,
.feedback mark {
  padding: 0 2px;
  color: #8c2a1f;
  background: #ffd9d0;
  border-radius: 3px;
  font-style: normal;
}

/* build-a-sentence stage */
.build-row-label {
  margin: 18px 0 8px;
  color: var(--muted);
  font-weight: 800;
  font-size: 0.9rem;
}

.build-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  min-height: 56px;
  padding: 10px;
  border: 3px dashed #8ca5dc;
  border-radius: 16px;
  background: #f3f7ff;
}

.build-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.tile {
  min-height: 46px;
  padding: 8px 14px;
  border: 3px solid var(--blue-dark);
  border-radius: 12px;
  color: var(--blue-dark);
  background: white;
  box-shadow: 3px 3px 0 #dfe8ff;
  font-size: 1rem;
  font-weight: 900;
  cursor: pointer;
  transition: transform 120ms ease;
}

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

.tile:disabled {
  opacity: 0.7;
  cursor: default;
  transform: none;
}

.build-row .tile {
  background: #eaf6ff;
  border-color: var(--blue);
}

/* story / gap-fill stage */
.story-card {
  position: relative;
}

.story-text {
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.32rem);
  font-weight: 700;
  line-height: 1.7;
}

.gap {
  display: inline-block;
  min-width: 46px;
  margin: 0 2px;
  padding: 2px 10px;
  border: 0;
  border-bottom: 3px solid #b9caef;
  border-radius: 6px 6px 0 0;
  background: #eef3ff;
  color: var(--blue-dark);
  font: inherit;
  font-weight: 900;
  cursor: default;
}

.gap.is-current {
  border-bottom-color: var(--coral);
  background: #fff0ed;
}

.gap.is-done {
  border-bottom-color: var(--mint);
  background: #e5fbf4;
  color: #075440;
}

/* sort stage: variable zone counts */
.sort-zones[data-count="3"] {
  grid-template-columns: repeat(3, 1fr);
}

.sort-zones[data-count="4"] {
  grid-template-columns: repeat(2, 1fr);
}

/* stage-complete sticker overlay */
.sticker-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 420px;
  padding: 30px 20px;
  text-align: center;
}

.sticker-overlay h2 {
  margin: 6px 0 4px;
}

.sticker-overlay .lead {
  margin: 0 0 10px;
  color: var(--coral);
  font-weight: 900;
  font-size: 1.3rem;
}

.praise-line {
  margin: 0 0 22px;
  color: var(--muted);
  font-weight: 800;
}

/* Russian translation line, shown only after an item is answered */
.translation {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

@media (max-width: 590px) {
  .item-image {
    height: 110px;
  }

  .lesson-card .primary-button {
    min-height: 48px;
  }

  .sticker-overlay {
    min-height: 320px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Вариант «без слова» в рассказе с пропусками */
.answer-button .gap-none {
  font-size: 0.85em;
  color: var(--muted);
  font-style: italic;
}