* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #1dd1a1;
  --accent:  #48dbfb;
  --text:    #2d3436;
  --muted:   #636e72;
  --shadow:    0 8px 24px rgba(29, 209, 161, 0.18);
  --shadow-lg: 0 16px 48px rgba(29, 209, 161, 0.28);
}

html, body { height: 100%; }

body {
  font-family: 'Fredoka', system-ui, -apple-system, Segoe UI, sans-serif;
  background:
    radial-gradient(circle at 10% 20%, #d3fdf2 0%, transparent 40%),
    radial-gradient(circle at 90% 30%, #e0f4ff 0%, transparent 40%),
    radial-gradient(circle at 50% 90%, #fff4cc 0%, transparent 40%),
    linear-gradient(135deg, #f0fff8, #f0f9ff);
  background-attachment: fixed;
  min-height: 100vh; min-height: 100dvh;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior-y: contain;
}

button { font-family: inherit; touch-action: manipulation; }
a { color: inherit; text-decoration: none; }

#app {
  max-width: 1100px; margin: 0 auto;
  padding-top:    max(24px, env(safe-area-inset-top));
  padding-bottom: max(48px, env(safe-area-inset-bottom));
  padding-left:   max(16px, env(safe-area-inset-left));
  padding-right:  max(16px, env(safe-area-inset-right));
}

.screen { display: none; animation: fadeIn 0.35s ease; }
.screen.active { display: block; }
@keyframes fadeIn { from { opacity:0; transform: translateY(8px); } to { opacity:1; transform: translateY(0); } }

/* ============== Навигация по детским модулям ============== */
.kids-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  overflow-x: auto;
  padding: 4px 2px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.kids-nav::-webkit-scrollbar { display: none; }
.kids-nav__chip {
  flex-shrink: 0;
  padding: 8px 16px;
  background: white;
  border-radius: 22px;
  text-decoration: none;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  box-shadow: var(--shadow);
  white-space: nowrap;
  transition: transform 0.2s;
}
.kids-nav__chip:active { transform: scale(0.95); }
.kids-nav__chip--active {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  pointer-events: none;
}
.kids-nav__chip--hub { padding: 8px 12px; }

.home-header { text-align: center; margin-bottom: 32px; }
.home-header h1 {
  font-size: clamp(2rem, 5vw, 3rem); font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}
.subtitle { color: var(--muted); font-size: 1rem; margin-bottom: 20px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.number-tile {
  aspect-ratio: 1;
  border: none;
  border-radius: 22px;
  background: white;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  position: relative;
  overflow: hidden;
  padding: 8px;
}
.number-tile::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--tile-color), transparent 70%);
  opacity: 0.18; transition: opacity 0.2s;
}
.number-tile:active { transform: scale(0.96); }

.tile-number { font-size: 3.4rem; font-weight: 700; color: var(--tile-color); line-height: 1; z-index: 1; }
.tile-word   { font-size: 0.9rem; color: var(--muted); margin-top: 4px; z-index: 1; font-weight: 500; }

.cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.cta-btn {
  font-size: 1.1rem; font-weight: 600; padding: 14px 28px;
  border-radius: 16px; border: none; cursor: pointer;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white; box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
  display: inline-block; text-align: center;
}
.cta-btn:active { transform: scale(0.96); }
.cta-btn.ghost { background: white; color: var(--text); }

.back-btn {
  font-size: 1rem; font-weight: 500; padding: 10px 18px;
  border-radius: 12px; border: none; cursor: pointer;
  background: white; color: var(--text); box-shadow: var(--shadow);
  margin-bottom: 24px; transition: transform 0.2s;
}

.number-card {
  background: white;
  border-radius: 36px;
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  max-width: 700px;
  margin: 0 auto;
  border: 6px solid var(--tile-color, var(--primary));
  transition: border-color 0.4s;
}

.big-number {
  font-size: clamp(6rem, 18vw, 10rem);
  font-weight: 700;
  line-height: 1;
  color: var(--tile-color, var(--primary));
  letter-spacing: -0.04em;
}

.number-word {
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
}

.items {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
  min-height: 60px;
}
.item {
  font-size: clamp(2rem, 5vw, 3rem);
  cursor: pointer;
  transition: transform 0.2s;
  padding: 4px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}
.item:active { transform: scale(0.85); }
.item.counted {
  animation: bounce 0.4s ease;
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-12px); }
}

.speak-btn {
  font-size: 1.05rem; font-weight: 500;
  padding: 14px 24px; border-radius: 16px; border: none; cursor: pointer;
  background: var(--tile-color, var(--primary));
  color: white; box-shadow: var(--shadow);
  transition: transform 0.2s;
}
.speak-btn:active { transform: scale(0.95); }

.letter-nav { display: flex; justify-content: center; gap: 16px; margin-top: 28px; }
.nav-btn {
  font-size: 1.6rem; font-weight: 700;
  width: 64px; height: 64px; border-radius: 50%;
  border: none; cursor: pointer;
  background: white; color: var(--text); box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.nav-btn:active { transform: scale(0.95); }

/* Игра */
.game-header { text-align: center; margin-bottom: 28px; }
.game-header h2 {
  font-size: 2rem; font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}
.game-stats { font-size: 1rem; color: var(--muted); }
.game-prompt { text-align: center; margin-bottom: 32px; }

.big-speak {
  font-size: 1.4rem; font-weight: 600;
  padding: 22px 44px; border-radius: 24px; border: none; cursor: pointer;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white; box-shadow: var(--shadow-lg); transition: transform 0.2s;
}
.big-speak:active { transform: scale(0.96); }

.game-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 16px; max-width: 600px; margin: 0 auto;
}
.game-option {
  aspect-ratio: 1; border-radius: 24px; background: white;
  font-size: 4rem; font-weight: 700; border: none; cursor: pointer;
  box-shadow: var(--shadow); transition: all 0.2s;
  color: var(--primary); font-family: inherit;
}
.game-option:active { transform: scale(0.96); }
.game-option:disabled { cursor: default; }
.game-option.correct { background: #55efc4; color: white; animation: pop 0.45s ease; }
.game-option.wrong   { background: #ff7675; color: white; animation: shake 0.4s ease; }
@keyframes pop { 0%,100%{transform:scale(1);} 50%{transform:scale(1.18);} }
@keyframes shake { 0%,100%{transform:translateX(0);} 25%{transform:translateX(-10px);} 75%{transform:translateX(10px);} }

.game-result {
  text-align: center; margin-top: 28px;
  font-size: 1.4rem; font-weight: 600; min-height: 2em; color: var(--text);
}
.game-final { padding: 32px 20px; }
.game-final .emoji-final { font-size: 5rem; margin-bottom: 12px; }
.game-final h3 { font-size: 1.8rem; margin-bottom: 12px; }
.game-final__buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 16px; }

@media (hover: hover) and (pointer: fine) {
  .number-tile:hover { transform: translateY(-4px) scale(1.03); box-shadow: var(--shadow-lg); }
  .number-tile:hover::before { opacity: 0.32; }
  .cta-btn:hover    { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
  .back-btn:hover   { transform: translateX(-3px); }
  .speak-btn:hover  { transform: scale(1.05); filter: brightness(1.05); }
  .nav-btn:hover    { transform: scale(1.1); box-shadow: var(--shadow-lg); }
  .big-speak:hover  { transform: scale(1.05); }
  .game-option:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
  .item:hover { transform: scale(1.15); }
}

@media (max-width: 480px) {
  .grid { grid-template-columns: repeat(auto-fill, minmax(95px, 1fr)); gap: 10px; }
  .tile-number { font-size: 2.6rem; }
  .number-card { padding: 24px 16px; border-radius: 28px; }
  .game-option { font-size: 3rem; }
}

/* ============== Feedback panel (после ответа) ============== */
.feedback-msg {
  font-size: clamp(1.05rem, 2.6vw, 1.3rem);
  font-weight: 500;
  margin-bottom: 14px;
  color: var(--text);
}
.feedback-correct {
  font-weight: 700;
  color: var(--primary);
}
.feedback-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.feedback-btn {
  font-size: 1.05rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 16px;
  border: none;
  cursor: pointer;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  box-shadow: var(--shadow);
  font-family: inherit;
  transition: transform 0.15s, box-shadow 0.15s;
}
.feedback-btn:active { transform: scale(0.96); }
.feedback-btn--ghost {
  background: white;
  color: var(--text);
}
@media (hover: hover) and (pointer: fine) {
  .feedback-btn:hover { transform: translateY(-2px); }
}

/* ============== Табы (диапазоны 0-10 / 11-20 / десятки) ============== */
.tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.tab {
  padding: 10px 22px;
  background: white;
  border-radius: 22px;
  border: none;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--muted);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.15s, color 0.15s;
}
.tab:active { transform: scale(0.96); }
.tab--active {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  font-weight: 600;
}

/* ============== Tap-to-speak: маленькая иконка «карточка» ============== */
.number-tile { position: relative; }
.tile-card-btn {
  position: absolute;
  top: 6px; right: 8px;
  font-size: 1.1rem;
  background: white;
  border-radius: 50%;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
  z-index: 2;
  transition: transform 0.15s;
  cursor: pointer;
}
.tile-card-btn:active { transform: scale(0.85); }
@media (hover: hover) and (pointer: fine) {
  .tile-card-btn:hover { transform: scale(1.1); }
}

.number-tile.tile-tapped {
  animation: tilePulse 0.32s ease;
}
@keyframes tilePulse {
  0%   { transform: scale(1); box-shadow: var(--shadow); }
  50%  { transform: scale(1.05); box-shadow: var(--shadow-lg); }
  100% { transform: scale(1); box-shadow: var(--shadow); }
}

/* ============== Карточка: визуализация для 11-20 и десятков ============== */
/* Группы и операторы занимают всю ширину => в flex-row+wrap они переносятся
   на отдельные строки. Одиночные .item для 0-10 продолжают идти в ряд. */
.items .group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  padding: 10px 14px;
  border-radius: 16px;
  width: 100%;
  background: rgba(0, 0, 0, 0.03);
}
.items .group.decade {
  border: 2px dashed rgba(29, 209, 161, 0.35);
  background: rgba(29, 209, 161, 0.06);
}
.items .group.ones {
  border: 2px dashed rgba(253, 121, 168, 0.35);
  background: rgba(253, 121, 168, 0.06);
}
.items .group-op {
  width: 100%;
  text-align: center;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--muted);
}