@import url('https://fonts.googleapis.com/css2?family=MedievalSharp&family=Cinzel:wght@400;600;700&family=Lato:wght@300;400;700&family=Crimson+Text:ital,wght@0,400;0,600;1,400&display=swap');

:root {
  --gold: #f5c842;
  --dark-gold: #c49a10;
  --purple: #6a0dad;
  --deep-purple: #3d006e;
  --teal: #0d9488;
  --forest: #1a4a2e;
  --midnight: #0d0d2b;
  --parchment: #fdf3dc;
  --rose: #e84393;
  --sky: #38bdf8;
  --cream: #fffbf0;
  --danger: #dc2626;
  --success: #16a34a;
  --mushroom: #c084fc;
}

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

body {
  font-family: 'Lato', sans-serif;
  background: var(--midnight);
  color: var(--cream);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* =========== STARFIELD BACKGROUND =========== */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(106,13,173,0.3) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(13,148,136,0.2) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(232,67,147,0.1) 0%, transparent 60%);
  z-index: 0;
  pointer-events: none;
}

.stars {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}
.star {
  position: absolute;
  background: white;
  border-radius: 50%;
  animation: twinkle var(--dur, 3s) infinite alternate;
}
@keyframes twinkle {
  from { opacity: 0.2; transform: scale(0.8); }
  to { opacity: 1; transform: scale(1.2); }
}

/* =========== LAYOUT =========== */
#app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

.page {
  display: none;
  min-height: 100vh;
  padding: 20px;
}
.page.active {
  display: block;
}

/* =========== HEADER =========== */
.site-header {
  text-align: center;
  padding: 30px 20px 20px;
  position: relative;
}

.site-title {
  font-family: 'Cinzel', serif;
  font-size: clamp(1.8rem, 5vw, 3.5rem);
  font-weight: 700;
  background: linear-gradient(135deg, var(--gold), var(--rose), var(--mushroom), var(--gold));
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 4s ease infinite;
  line-height: 1.2;
  text-shadow: none;
  filter: drop-shadow(0 0 20px rgba(245,200,66,0.4));
}

@keyframes shimmer {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.site-subtitle {
  font-family: 'Crimson Text', serif;
  font-style: italic;
  color: var(--mushroom);
  font-size: 1.1rem;
  margin-top: 8px;
  opacity: 0.9;
}

.header-creatures {
  font-size: 2rem;
  margin: 10px 0;
  letter-spacing: 8px;
}

/* =========== HOME PAGE =========== */
.home-intro {
  max-width: 700px;
  margin: 0 auto 30px;
  text-align: center;
  padding: 20px;
  background: rgba(255,255,255,0.04);
  border-radius: 16px;
  border: 1px solid rgba(245,200,66,0.2);
  font-family: 'Crimson Text', serif;
  font-size: 1.1rem;
  line-height: 1.7;
  color: rgba(255,251,240,0.85);
}

.grammar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 10px 40px;
}

.grammar-card {
  background: linear-gradient(135deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  border: 1px solid rgba(245,200,66,0.25);
  border-radius: 16px;
  padding: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(4px);
}

.grammar-card::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at center, rgba(245,200,66,0.08), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s;
}

.grammar-card:hover::before { opacity: 1; }

.grammar-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
  box-shadow: 0 8px 30px rgba(245,200,66,0.2), 0 0 60px rgba(106,13,173,0.2);
}

.card-number {
  font-family: 'Cinzel', serif;
  font-size: 0.75rem;
  color: var(--mushroom);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.card-emoji {
  font-size: 2rem;
  margin-bottom: 8px;
  display: block;
}

.card-title {
  font-family: 'Cinzel', serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--gold);
  line-height: 1.3;
  margin-bottom: 6px;
}

.card-creature {
  font-size: 0.8rem;
  color: rgba(192,132,252,0.7);
  font-style: italic;
}

.card-arrow {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  color: var(--gold);
  opacity: 0.4;
  transition: all 0.3s;
}
.grammar-card:hover .card-arrow {
  opacity: 1;
  right: 12px;
}

/* =========== EXPLANATION PAGE =========== */
.explanation-page {
  max-width: 860px;
  margin: 0 auto;
  padding: 20px;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--cream);
  padding: 10px 18px;
  border-radius: 50px;
  cursor: pointer;
  font-family: 'Lato', sans-serif;
  font-size: 0.9rem;
  transition: all 0.25s;
  margin-bottom: 24px;
  text-decoration: none;
}
.back-btn:hover {
  background: rgba(245,200,66,0.15);
  border-color: var(--gold);
  color: var(--gold);
}

.explanation-header {
  margin-bottom: 28px;
}

.explanation-title {
  font-family: 'Cinzel', serif;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 6px;
}

.explanation-creature {
  font-family: 'Crimson Text', serif;
  font-style: italic;
  color: var(--mushroom);
  font-size: 1rem;
}

.explanation-content {
  background: rgba(255,251,240,0.04);
  border: 1px solid rgba(245,200,66,0.15);
  border-radius: 20px;
  padding: 30px;
  font-family: 'Crimson Text', serif;
  font-size: 1.05rem;
  line-height: 1.75;
  color: rgba(255,251,240,0.92);
}

.explanation-content h4 {
  font-family: 'Cinzel', serif;
  color: var(--gold);
  margin: 20px 0 10px;
  font-size: 1rem;
}

.explanation-content ul {
  padding-left: 22px;
  margin: 10px 0;
}
.explanation-content ul li {
  margin-bottom: 6px;
}

.explanation-content p {
  margin-bottom: 12px;
}

/* =========== CONTENT BOXES =========== */
.tense-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  margin: 18px 0;
}

.tense-card {
  background: rgba(106,13,173,0.15);
  border: 1px solid rgba(192,132,252,0.25);
  border-radius: 12px;
  padding: 16px;
}

.tense-card h4 {
  font-family: 'Cinzel', serif;
  font-size: 0.85rem;
  color: var(--mushroom);
  margin-bottom: 8px;
  margin-top: 0 !important;
}

.tense-card p { margin-bottom: 6px; font-size: 0.95rem; }
.tense-card ul { font-size: 0.9rem; }

.example {
  color: var(--sky);
  font-style: italic;
  font-size: 0.9rem;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
  margin: 18px 0;
}

.concept-box {
  background: rgba(13,148,136,0.12);
  border: 1px solid rgba(56,189,248,0.2);
  border-radius: 12px;
  padding: 16px;
}
.concept-box h4 {
  font-family: 'Cinzel', serif;
  font-size: 0.85rem;
  color: var(--sky);
  margin-bottom: 8px;
  margin-top: 0 !important;
}

.example-box {
  background: rgba(245,200,66,0.06);
  border-left: 3px solid var(--gold);
  border-radius: 0 12px 12px 0;
  padding: 16px 20px;
  margin: 18px 0;
}
.example-box h4 {
  color: var(--gold);
  margin-top: 0 !important;
}
.example-box p { margin-bottom: 8px; font-size: 0.95rem; }

.academic-box {
  background: linear-gradient(135deg, rgba(232,67,147,0.1), rgba(106,13,173,0.1));
  border: 1px solid rgba(232,67,147,0.3);
  border-radius: 14px;
  padding: 18px 22px;
  margin-top: 24px;
}

.academic-label {
  display: inline-block;
  background: var(--rose);
  color: white;
  font-family: 'Cinzel', serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  padding: 4px 12px;
  border-radius: 50px;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.academic-box p {
  font-size: 0.95rem;
  color: rgba(255,251,240,0.88);
}

/* =========== PRACTICE BUTTON =========== */
.practice-btn-wrap {
  text-align: center;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid rgba(245,200,66,0.15);
}

.btn-practice {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--purple), var(--teal));
  color: white;
  border: none;
  padding: 16px 36px;
  border-radius: 50px;
  font-family: 'Cinzel', serif;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 20px rgba(106,13,173,0.4);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.btn-practice:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(106,13,173,0.6);
  filter: brightness(1.15);
}

/* =========== PRACTICE PAGE =========== */
.practice-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px;
}

.practice-header {
  margin-bottom: 28px;
}

.progress-bar-wrap {
  background: rgba(255,255,255,0.08);
  border-radius: 50px;
  height: 8px;
  margin: 12px 0;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--rose));
  border-radius: 50px;
  transition: width 0.4s ease;
}

.question-counter {
  font-size: 0.85rem;
  color: var(--mushroom);
  font-family: 'Cinzel', serif;
  letter-spacing: 1px;
}

.question-box {
  background: rgba(255,251,240,0.04);
  border: 1px solid rgba(245,200,66,0.2);
  border-radius: 20px;
  padding: 28px;
  margin-bottom: 20px;
}

.question-text {
  font-family: 'Crimson Text', serif;
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--cream);
  margin-bottom: 22px;
}

/* =========== MCQ OPTIONS =========== */
.options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option-btn {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--cream);
  padding: 14px 20px;
  border-radius: 12px;
  cursor: pointer;
  font-family: 'Crimson Text', serif;
  font-size: 1rem;
  text-align: left;
  transition: all 0.2s;
  line-height: 1.4;
}
.option-btn:hover:not(:disabled) {
  background: rgba(245,200,66,0.1);
  border-color: var(--gold);
}
.option-btn.correct {
  background: rgba(22,163,74,0.2);
  border-color: var(--success);
  color: #86efac;
}
.option-btn.incorrect {
  background: rgba(220,38,38,0.2);
  border-color: var(--danger);
  color: #fca5a5;
}
.option-btn:disabled { cursor: not-allowed; }

/* =========== FILL IN BLANK =========== */
.fill-input-wrap {
  display: flex;
  gap: 10px;
  align-items: stretch;
  flex-wrap: wrap;
}

.fill-input {
  flex: 1;
  min-width: 200px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(245,200,66,0.3);
  color: var(--cream);
  padding: 14px 18px;
  border-radius: 12px;
  font-family: 'Crimson Text', serif;
  font-size: 1.05rem;
  outline: none;
  transition: border-color 0.2s;
}
.fill-input:focus { border-color: var(--gold); }
.fill-input.correct {
  border-color: var(--success);
  background: rgba(22,163,74,0.1);
}
.fill-input.incorrect {
  border-color: var(--danger);
  background: rgba(220,38,38,0.1);
}

.btn-check {
  background: var(--gold);
  color: var(--midnight);
  border: none;
  padding: 14px 24px;
  border-radius: 12px;
  font-family: 'Cinzel', serif;
  font-size: 0.9rem;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s;
  letter-spacing: 1px;
}
.btn-check:hover { filter: brightness(1.1); transform: scale(1.02); }

/* =========== FEEDBACK =========== */
.feedback-box {
  margin-top: 16px;
  padding: 14px 18px;
  border-radius: 12px;
  font-family: 'Crimson Text', serif;
  font-size: 1rem;
  line-height: 1.5;
  display: none;
}
.feedback-box.show { display: block; }
.feedback-box.correct-fb {
  background: rgba(22,163,74,0.15);
  border: 1px solid rgba(22,163,74,0.4);
  color: #86efac;
}
.feedback-box.hint-fb {
  background: rgba(245,158,11,0.12);
  border: 1px solid rgba(245,158,11,0.35);
  color: #fcd34d;
}

.feedback-icon { font-size: 1.2rem; margin-right: 8px; }

.hint-text {
  margin-top: 6px;
  color: rgba(252,211,77,0.9);
  font-style: italic;
}

/* =========== NEXT QUESTION / COMPLETION =========== */
.btn-next {
  display: none;
  margin-top: 16px;
  background: linear-gradient(135deg, var(--teal), var(--sky));
  color: white;
  border: none;
  padding: 14px 28px;
  border-radius: 50px;
  font-family: 'Cinzel', serif;
  font-size: 0.9rem;
  cursor: pointer;
  letter-spacing: 1px;
  transition: all 0.3s;
}
.btn-next.show { display: inline-flex; align-items: center; gap: 8px; }
.btn-next:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(13,148,136,0.4); }

/* =========== COMPLETION =========== */
.completion-box {
  text-align: center;
  padding: 40px 24px;
}

.completion-title {
  font-family: 'Cinzel', serif;
  font-size: 2rem;
  color: var(--gold);
  margin-bottom: 12px;
}
.completion-creatures {
  font-size: 3rem;
  margin: 16px 0;
  letter-spacing: 10px;
  animation: bounce 1s infinite alternate;
}
@keyframes bounce {
  from { transform: translateY(0); }
  to { transform: translateY(-10px); }
}

.completion-text {
  font-family: 'Crimson Text', serif;
  font-size: 1.1rem;
  color: rgba(255,251,240,0.85);
  margin-bottom: 28px;
  line-height: 1.7;
}

.score-display {
  font-family: 'Cinzel', serif;
  font-size: 1.5rem;
  color: var(--mushroom);
  margin-bottom: 24px;
}

.completion-btns {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-secondary {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--cream);
  padding: 14px 28px;
  border-radius: 50px;
  cursor: pointer;
  font-family: 'Cinzel', serif;
  font-size: 0.9rem;
  letter-spacing: 1px;
  transition: all 0.25s;
}
.btn-secondary:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(245,200,66,0.1);
}

/* =========== FLOATING CREATURES =========== */
.floating-creature {
  position: fixed;
  font-size: 2rem;
  pointer-events: none;
  z-index: 0;
  animation: float var(--float-dur, 6s) ease-in-out infinite alternate;
  opacity: 0.4;
}
@keyframes float {
  from { transform: translateY(0) rotate(-5deg); }
  to { transform: translateY(-20px) rotate(5deg); }
}

/* =========== RESPONSIVE =========== */
@media (max-width: 600px) {
  .grammar-grid { grid-template-columns: 1fr; }
  .tense-cards, .concept-grid { grid-template-columns: 1fr; }
  .explanation-content { padding: 20px 16px; }
  .question-box { padding: 20px 16px; }
  .site-title { font-size: 1.6rem; }
  .completion-btns { flex-direction: column; align-items: center; }
}