@import url("https://fonts.googleapis.com/css2?family=Bree+Serif&family=Fredoka:wght@400;500;600;700&display=swap");

:root {
  --ink: #1a1b2b;
  --muted: #5b5f73;
  --surface: #fffaf2;
  --card: #ffffff;
  --accent: #ff9f1c;
  --accent-2: #2ec4b6;
  --accent-3: #ff6b6b;
  --outline: rgba(26, 27, 43, 0.12);
  --shadow: 0 18px 40px rgba(26, 27, 43, 0.15);
  --radius: 26px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Fredoka", "Trebuchet MS", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top, #fff3d9 0%, #e2f3f1 45%, #f8e6ff 100%);
  position: relative;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  opacity: 0.22;
  pointer-events: none;
  filter: blur(2px);
}

body::before {
  background: radial-gradient(circle at 30% 30%, #ff9f1c 0%, rgba(255, 159, 28, 0) 70%);
  top: -160px;
  left: -140px;
}

body::after {
  background: radial-gradient(circle at 70% 70%, #2ec4b6 0%, rgba(46, 196, 182, 0) 70%);
  bottom: -160px;
  right: -140px;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 36px 24px 72px;
  position: relative;
  z-index: 1;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 16px;
}

.back-link:hover {
  color: var(--ink);
}

.hero {
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  align-items: center;
  margin-bottom: 28px;
}

.hero-text {
  display: grid;
  gap: 16px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-2);
  margin: 0;
}

h1,
h2 {
  font-family: "Bree Serif", "Georgia", serif;
  margin: 0;
}

h1 {
  font-size: clamp(2.3rem, 3.2vw, 3.2rem);
  line-height: 1.05;
}

h2 {
  font-size: 1.6rem;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 38ch;
}

.hero-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff4dc;
  color: #a65a00;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 0.95rem;
  border: 1px solid rgba(166, 90, 0, 0.2);
  width: fit-content;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--outline);
  box-shadow: var(--shadow);
  padding: 24px;
  position: relative;
}

.hero-stats {
  display: grid;
  gap: 16px;
}

.stat {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 12px 14px;
  border-radius: 16px;
  background: #fff8ec;
  border: 1px solid rgba(255, 159, 28, 0.2);
}

.stat-label {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.75rem;
  color: var(--muted);
}

.stat-value {
  font-size: 1.3rem;
  font-weight: 600;
}

.layout {
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  align-items: start;
}

.panel {
  display: grid;
  gap: 16px;
}

.muted {
  color: var(--muted);
  margin: 0;
}

.sound-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
  gap: 10px;
}

.sound-chip {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 600;
  background: #f1f7ff;
  color: #204a87;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.sound-example {
  font-weight: 500;
  font-size: 0.85rem;
  opacity: 0.8;
}

.sound-chip[aria-pressed="true"] {
  background: #2ec4b6;
  color: #062d28;
  box-shadow: 0 10px 18px rgba(46, 196, 182, 0.25);
}

.sound-chip:hover {
  transform: translateY(-1px);
  border-color: rgba(26, 27, 43, 0.15);
}

.panel-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

button {
  padding: 12px 16px;
  border-radius: 14px;
  border: none;
  background: var(--accent);
  color: #2e1a00;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  font-family: inherit;
  box-shadow: 0 12px 20px rgba(255, 159, 28, 0.25);
}

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

button.secondary {
  background: #e8f6f5;
  color: #0a4b44;
  box-shadow: none;
  border: 1px solid rgba(46, 196, 182, 0.4);
}

button.ghost {
  background: transparent;
  color: var(--muted);
  box-shadow: none;
  border: 1px dashed rgba(26, 27, 43, 0.3);
}

button.good {
  background: #2ec4b6;
  color: #062d28;
}

button.retry {
  background: #ff6b6b;
  color: #3b0d0d;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.legend {
  display: grid;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--muted);
}

.legend-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-3);
}

.card-area {
  display: grid;
  gap: 18px;
  align-content: start;
}

.flashcard {
  position: relative;
  min-height: 320px;
  perspective: 1200px;
  cursor: pointer;
}

.flashcard .card-face {
  position: absolute;
  inset: 0;
  padding: 32px;
  border-radius: var(--radius);
  backface-visibility: hidden;
  display: grid;
  gap: 18px;
  align-content: center;
  background: var(--surface);
  border: 1px solid var(--outline);
  box-shadow: var(--shadow);
  transition: transform 0.6s ease;
}

.flashcard .card-front {
  transform: rotateY(0deg);
}

.flashcard .card-back {
  transform: rotateY(180deg);
  background: #f1fff8;
}

.flashcard.is-flipped .card-front {
  transform: rotateY(-180deg);
}

.flashcard.is-flipped .card-back {
  transform: rotateY(0deg);
}

.card-label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--muted);
}

.card-word {
  font-size: clamp(2.6rem, 5vw, 4rem);
  font-weight: 700;
  text-align: center;
}

.highlight {
  color: var(--accent-3);
  background: rgba(255, 107, 107, 0.15);
  padding: 2px 6px;
  border-radius: 10px;
}

.card-hint {
  text-align: center;
  color: var(--muted);
  font-size: 1rem;
}

.card-answer {
  font-size: 1.4rem;
  text-align: center;
}

.card-answer span {
  color: var(--accent-2);
  font-weight: 700;
  text-transform: uppercase;
}

.card-sentence {
  font-size: 1.1rem;
  text-align: center;
  color: var(--muted);
}

.card-controls,
.grade-controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.status {
  min-height: 1.4em;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 980px) {
  .hero,
  .layout {
    grid-template-columns: 1fr;
  }

  .flashcard {
    min-height: 280px;
  }
}

@media (max-width: 640px) {
  .page {
    padding: 28px 18px 60px;
  }

  button {
    width: 100%;
  }

  .card-controls,
  .grade-controls,
  .panel-actions {
    flex-direction: column;
  }
}

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