/* Global Styles for Emoji Quiz Hub */

/* ====================================================
   PART 1 – Theme Tokens (CSS Variables)
   ==================================================== */
:root {
  --color-bg: #f5f7fb;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-primary: #0070f3;
  --color-primary-soft: #e0efff;
  --color-text-main: #111827;
  --color-text-muted: #6b7280;
  --shadow-soft: 0 10px 25px rgba(15, 23, 42, 0.08);
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition-fast: 0.18s ease-out;
}

/* ====================================================
   PART 2 – Global Typography & Layout
   ==================================================== */
html {
  margin: 0;
}

body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--color-text-main);
  background: var(--color-bg);
  line-height: 1.6;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

@media (min-width: 768px) {
  .container {
    padding-left: 24px;
    padding-right: 24px;
  }
}

main {
  min-height: calc(100vh - 80px);
}

main h1 {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 16px 0;
  color: var(--color-text-main);
}

main h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 32px 0 16px 0;
  color: var(--color-text-main);
}

.page-description {
  font-size: 0.98rem;
  color: var(--color-text-muted);
  margin: 0 0 24px 0;
}

/* ====================================================
   PART 3 – Navbar Polish
   ==================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.9);
  flex-wrap: wrap;
}

.navbar a {
  font-size: 0.95rem;
  text-decoration: none;
  color: var(--color-text-muted);
  padding: 6px 10px;
  border-radius: 999px;
  transition: background var(--transition-fast), color var(--transition-fast);
  font-weight: 500;
}

.navbar a:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.navbar a.active {
  background: var(--color-primary);
  color: #ffffff;
}

.navbar a.active:hover {
  background: var(--color-primary);
  color: #ffffff;
}

/* ====================================================
   PART 4 – Category Cards & Back Links
   ==================================================== */
.category-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 40px 0;
}

@media (min-width: 640px) {
  .category-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .category-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.category-card {
  display: block;
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--color-text-main);
  text-decoration: none;
  text-align: center;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast),
    background var(--transition-fast);
}

.category-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
  border-color: var(--color-primary);
  background: #ffffff;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-decoration: none;
  margin: 12px 0 16px 0;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.back-link::before {
  content: "←";
  font-size: 0.9rem;
}

.back-link:hover {
  color: var(--color-primary);
  transform: translateX(-1px);
  text-decoration: none;
}

.back-link-icon {
  margin-right: 6px;
  font-size: 0.9rem;
}

/* ====================================================
   PART 5 – Quiz UI Alignment Tweaks
   ==================================================== */
.quiz-container {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  padding: 24px 20px 80px; /* extra bottom space for floating feedback + next button */
  margin-top: 24px;
  animation: quizEnter 0.35s ease-out;
}

@keyframes quizEnter {
  from {
    opacity: 0;
    transform: translateY(5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes feedbackFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 0.88;
  }
}

.emoji-display {
  margin: 24px 0 16px;
}

.emoji-display .emoji-text {
  font-size: 3.5rem;
}

.option-btn {
  font-size: 0.95rem;
  border-radius: 10px;
  text-decoration: none;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
}

.option-btn,
.option-btn:hover,
.option-btn:active,
.option-btn:focus {
  text-decoration: none;
}

.option-btn a,
.option-btn * {
  text-decoration: none;
}

.option-btn:hover:not(:disabled) {
  transform: translateY(-1px) scale(1.01);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.12);
  text-decoration: none;
}

.option-btn:active:not(:disabled) {
  transform: translateY(1px) scale(0.99);
  text-decoration: none;
}

.option-btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  transform: none !important;
}

.option-btn.correct-answer {
  animation: answerPop 0.3s ease-out;
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
  transform: scale(1.02);
}

.option-btn.wrong-answer {
  animation: answerPop 0.3s ease-out;
  box-shadow: 0 4px 12px rgba(244, 67, 54, 0.3);
  transform: scale(1.02);
}

@keyframes answerPop {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1.02);
  }
}

.feedback {
  /* keep space reserved even when empty */
  min-height: 24px;
  margin: 8px 0 0;
  padding: 2px 0;
  font-size: 0.85rem;
  /* center horizontally inside quiz card */
  display: flex !important;
  justify-content: center;
  align-items: center;
  width: 100%;
  text-align: center;
  /* light style, no strong background */
  background: transparent;
  border-radius: 0;
  box-shadow: none;
}

.feedback.correct {
  color: #2f8f4e;
}

.feedback.correct::before {
  content: "✅ ";
  font-size: 0.9em;
}

.feedback.wrong {
  color: #d97757;
}

.feedback.wrong::before {
  content: "⚠️ ";
  font-size: 0.9em;
}

/* when there is no text, keep the same height but hide content */
.feedback:empty {
  visibility: hidden;
}

.next-btn,
.play-again-btn {
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

.next-btn:hover:not(:disabled),
.play-again-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(33, 150, 243, 0.3);
  background: #1976d2;
}

.next-btn:active:not(:disabled),
.play-again-btn:active:not(:disabled) {
  transform: translateY(1px) scale(0.98);
}

.next-btn:disabled,
.play-again-btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  transform: none !important;
}

/* ====================================================
   Additional Styles (Preserved)
   ==================================================== */
/* Link styles */
a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: none;
}

/* Ensure quiz-root has proper spacing */
#quiz-root {
  margin-top: 20px;
}

/* Breadcrumb navigation */
.breadcrumb {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 8px 0 16px 0;
}

.breadcrumb a {
  color: #555;
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: none;
}

.breadcrumb-separator {
  margin: 0 4px;
  color: #aaa;
}

/* Responsive adjustments */
@media (max-width: 600px) {
  .container {
    padding: 16px;
  }

  main h1 {
    font-size: 1.75rem;
  }

  .navbar {
    padding: 12px;
    gap: 16px;
  }

  .category-card {
    padding: 24px 20px;
    font-size: 1.1rem;
  }
}

/* Mobile optimizations for quiz interactions */
@media (max-width: 480px) {
  .option-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.1);
  }

  .option-btn.correct-answer,
  .option-btn.wrong-answer {
    transform: scale(1.01);
  }

  @keyframes answerPop {
    0% {
      transform: scale(1);
    }
    50% {
      transform: scale(1.03);
    }
    100% {
      transform: scale(1.01);
    }
  }

  .next-btn:hover:not(:disabled),
  .play-again-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.25);
  }

  .feedback {
    font-size: 0.8rem;
    padding: 4px 0;
  }
}