:root {
  --bg: #eef4ff;
  --bg-2: #fdf7ef;
  --card: #ffffff;
  --ink: #1f2a44;
  --muted: #5b6b8c;
  --line: #d7e2f5;
  --primary: #4f7cff;
  --primary-dark: #3a63d9;
  --secondary: #22a06b;
  --secondary-dark: #1a8256;
  --warn: #f4a261;
  --danger: #e76f51;
  --ok: #2a9d8f;
  --shadow: 0 12px 30px rgba(40, 70, 140, 0.12);
  --radius: 22px;
  --font: "Segoe UI", "Nunito", "Trebuchet MS", system-ui, sans-serif;
  --letter-font: "Comic Sans MS", "Chalkboard SE", "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 10%, #dce9ff 0, transparent 40%),
    radial-gradient(circle at 90% 0%, #ffe8d6 0, transparent 35%),
    linear-gradient(180deg, var(--bg), var(--bg-2));
}

button, input {
  font: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

.app {
  width: min(980px, 100%);
  margin: 0 auto;
  padding: 18px 16px 40px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand-emoji {
  font-size: 2.2rem;
  line-height: 1;
  filter: drop-shadow(0 4px 0 rgba(0,0,0,0.06));
}

.brand-logo {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: 40px;
  border: 2px solid var(--line);
  box-shadow: 0 6px 14px rgba(40, 70, 140, 0.14);
  flex-shrink: 0;
  background: #fff;
}

.brand-text {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.brand-title {
  margin: 0;
  font-family: var(--letter-font);
  font-size: clamp(2.1rem, 6vw, 3.15rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.brand-isar,
.brand-fuchs {
  display: inline-block;
}

.brand-isar {
  color: #3d7fd9;
  text-shadow:
    0 2px 0 rgba(255, 255, 255, 0.85),
    0 8px 18px rgba(61, 127, 217, 0.22);
}

.brand-fuchs {
  color: #f07a28;
  text-shadow:
    0 2px 0 rgba(255, 255, 255, 0.85),
    0 8px 18px rgba(240, 122, 40, 0.24);
}

h1 {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.stats {
  display: flex;
  gap: 10px;
}

.stat {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: 999px;
  padding: 8px 14px;
  font-weight: 800;
  box-shadow: var(--shadow);
  min-width: 72px;
  justify-content: center;
}

.stat-icon {
  font-size: 1.1rem;
}

.tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 16px;
  background: rgba(255,255,255,0.55);
  border: 2px solid var(--line);
  border-radius: 18px;
  padding: 6px;
}

.tab {
  border-radius: 12px;
  padding: 12px 10px;
  font-weight: 800;
  color: var(--muted);
  transition: 0.15s ease;
}

.tab.is-active {
  background: var(--card);
  color: var(--ink);
  box-shadow: 0 6px 16px rgba(40, 70, 140, 0.1);
}

.panel[hidden] {
  display: none !important;
}

.panel.is-visible {
  display: block;
}

.card {
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 16px 14px;
}

.practice-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.section-head {
  margin-bottom: 14px;
}

.section-head h2 {
  margin: 0 0 4px;
  font-size: 1.35rem;
}

.section-head p,
.prompt,
.hint,
.footer p {
  margin: 0;
  color: var(--muted);
}

.progress-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.progress-track {
  flex: 1;
  height: 12px;
  background: #e8eefc;
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 10%;
  background: linear-gradient(90deg, #7aa2ff, #4f7cff);
  border-radius: inherit;
  transition: width 0.25s ease;
}

.progress-label {
  font-weight: 800;
  color: var(--muted);
  min-width: 58px;
  text-align: right;
}

.emoji-stage {
  display: grid;
  justify-items: center;
  gap: 4px;
  margin: 0 0 8px;
  position: relative;
}

.emoji-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
}

.emoji-bubble {
  width: min(168px, 46vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  font-size: clamp(4.2rem, 14vw, 6.2rem);
  background: linear-gradient(160deg, #f4f8ff, #fff6ea);
  border: 3px dashed #c9d8f5;
  border-radius: 32px;
  box-shadow: inset 0 0 0 8px rgba(255,255,255,0.7);
  user-select: none;
}

.speak-btn.side {
  min-width: 88px;
  min-height: 88px;
  flex: 0 0 auto;
}

.speak-btn.side .speak-icon {
  font-size: 2.5rem;
}

.speak-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 64px;
  min-height: 64px;
  border-radius: 999px;
  background: #fff;
  border: 3px solid #b9ccf5;
  box-shadow: 0 8px 0 #d7e2f5;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.speak-btn:active {
  transform: translateY(4px);
  box-shadow: 0 4px 0 #d7e2f5;
}

.speak-btn.big {
  min-width: 220px;
  min-height: 120px;
  border-radius: 28px;
  flex-direction: column;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--ink);
}

.speak-icon {
  font-size: 1.8rem;
  line-height: 1;
}

.speak-btn.big .speak-icon {
  font-size: 2.6rem;
}

.speak-btn.replay {
  min-width: 56px;
  min-height: 56px;
  flex: 0 0 auto;
}

.speak-btn.replay .speak-icon {
  font-size: 1.45rem;
}

.prompt {
  text-align: center;
  margin-bottom: 12px;
  font-size: 1.05rem;
}

.prompt strong {
  color: var(--primary-dark);
}

.answer-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 8px;
}

.letter-input {
  width: 92px;
  height: 92px;
  text-align: center;
  font-family: var(--letter-font);
  font-size: 2.6rem;
  font-weight: 800;
  text-transform: uppercase;
  border-radius: 22px;
  border: 3px solid #b9ccf5;
  background: #f8fbff;
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.letter-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 5px rgba(79, 124, 255, 0.18);
}

.letter-input.is-ok {
  border-color: var(--ok);
  background: #e8f8f4;
}

.letter-input.is-bad {
  border-color: var(--danger);
  background: #ffefea;
  animation: shake 0.35s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

.btn {
  border-radius: 16px;
  padding: 0 22px;
  min-height: 56px;
  font-weight: 800;
  transition: transform 0.1s ease, filter 0.1s ease;
}

.btn:active {
  transform: translateY(2px);
}

.btn.primary {
  background: linear-gradient(180deg, #6b90ff, var(--primary));
  color: #fff;
  box-shadow: 0 8px 0 var(--primary-dark);
}

.btn.secondary {
  background: linear-gradient(180deg, #35c489, var(--secondary));
  color: #fff;
  box-shadow: 0 8px 0 var(--secondary-dark);
}

.btn.ghost {
  color: var(--muted);
  border: 2px solid var(--line);
  background: #fff;
}

.choice-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 8px;
}

.choice-row[hidden] {
  display: none !important;
}

.choice {
  min-height: 74px;
  border-radius: 16px;
  border: 3px solid #b9ccf5;
  background: #f8fbff;
  font-family: var(--letter-font);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--ink);
}

.choice.is-wide {
  font-size: 1.15rem;
}

.choice.is-ok {
  border-color: var(--ok);
  background: #e8f8f4;
}

.choice.is-bad {
  border-color: var(--danger);
  background: #ffefea;
}

.choice:disabled {
  cursor: default;
}

.help-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 0 0 8px;
}

.feedback-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 0;
  min-height: 52px;
  width: 100%;
}

.feedback-row.is-empty .feedback {
  visibility: hidden;
}

.feedback-row.is-empty .replay {
  visibility: hidden;
}

.feedback {
  text-align: center;
  font-weight: 800;
  font-size: clamp(0.95rem, 3.6vw, 1.1rem);
  margin: 0;
  min-height: 1.2em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: min(100%, 28rem);
  line-height: 1.2;
}

.feedback.ok {
  color: var(--ok);
}

.feedback.bad {
  color: var(--danger);
}

.practice-dock {
  margin-top: 4px;
  padding-top: 10px;
  border-top: 2px solid var(--line);
  display: grid;
  gap: 8px;
}

.practice-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 0;
  min-height: 52px;
}

.practice-actions .btn.secondary {
  min-width: min(220px, 100%);
}

.practice-actions .btn.secondary:disabled {
  opacity: 0.35;
  cursor: default;
}

.parent-setup {
  margin-bottom: 12px;
  border: 2px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
}

.parent-setup summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}

.parent-setup summary::-webkit-details-marker {
  display: none;
}

.parent-setup summary::after {
  content: "▾";
  color: var(--muted);
  font-size: 0.9rem;
}

.parent-setup:not([open]) summary::after {
  content: "▸";
}

.setup-summary {
  margin-left: auto;
  color: var(--primary-dark);
  font-family: var(--letter-font);
  font-size: 0.95rem;
  font-weight: 800;
}

.parent-setup-body {
  padding: 0 14px 8px;
}

.letter-picker {
  margin-bottom: 14px;
}

.picker-label {
  margin: 0 0 8px;
  color: var(--muted);
  font-weight: 700;
  font-size: 0.95rem;
}

#letter-filters {
  margin-bottom: 0;
}

#letter-filters .chip {
  min-width: 46px;
  padding: 8px 10px;
  font-family: var(--letter-font);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.chip {
  border-radius: 999px;
  padding: 8px 14px;
  background: #f3f7ff;
  border: 2px solid #d5e1f7;
  color: var(--muted);
  font-weight: 700;
}

.chip.is-active {
  background: #e8efff;
  border-color: #9db6ef;
  color: var(--primary-dark);
}

.laut-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(132px, 1fr));
  gap: 12px;
}

.laut-card {
  display: grid;
  gap: 4px;
  justify-items: center;
  text-align: center;
  padding: 14px 10px 12px;
  border-radius: 18px;
  background: linear-gradient(160deg, #f8fbff, #fff8f0);
  border: 2px solid #d7e2f5;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  min-height: 150px;
}

.laut-card:hover,
.laut-card:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(40, 70, 140, 0.12);
  outline: none;
  border-color: #9db6ef;
}

.laut-card .emoji {
  font-size: 2.4rem;
  line-height: 1;
}

.laut-card .letter {
  font-family: var(--letter-font);
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1;
}

.laut-card .word {
  color: var(--muted);
  font-weight: 700;
  font-size: 0.95rem;
}

.laut-card .speak-mini {
  margin-top: 4px;
  font-size: 1rem;
  opacity: 0.85;
}

.footer {
  text-align: center;
  margin-top: 18px;
  font-size: 0.9rem;
}

.cheer {
  pointer-events: none;
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 60;
}

.cheer span {
  font-size: clamp(8rem, 42vw, 14rem);
  line-height: 1;
  animation: cheer-pop 1.15s ease forwards;
}

@keyframes cheer-pop {
  0% {
    transform: scale(0.35);
    opacity: 0;
  }
  20% {
    transform: scale(1.12);
    opacity: 1;
  }
  45% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(1.25);
    opacity: 0;
  }
}

.confetti {
  pointer-events: none;
  position: fixed;
  inset: 0;
  overflow: hidden;
  z-index: 50;
}

.confetti span {
  position: absolute;
  top: -20px;
  font-size: 1.4rem;
  animation: fall 1.4s ease-in forwards;
}

@keyframes fall {
  to {
    transform: translateY(110vh) rotate(480deg);
    opacity: 0;
  }
}

@media (max-width: 560px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .brand-logo {
    width: 96px;
    height: 96px;
    border-radius: 24px;
  }

  .emoji-bubble {
    width: min(132px, 38vw);
    font-size: clamp(3.4rem, 12vw, 4.8rem);
    border-radius: 26px;
  }

  .speak-btn.side {
    min-width: 72px;
    min-height: 72px;
  }

  .letter-input {
    width: 78px;
    height: 78px;
    font-size: 2.2rem;
  }

  .answer-row {
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
  }

  .choice {
    min-height: 64px;
  }

  .btn.primary,
  .btn.secondary {
    width: min(240px, 100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}