:root {
  --primary-color: #019863;
  --background-light: #f5f8f7;
  --card-bg: #ffffff;
  --border-color: #e0e0e0;
  --text-light: #111;
  --text-muted: #555;
  --correct-color: #28a745;
  --incorrect-color: #dc3545;
  --silver-coin: #c0c0c0;
  --copper-coin: #b87333;
  --gold-coin: #ffd700;
  --font-kannada: "Noto Sans Kannada", sans-serif;
  --font-display: "Noto Sans Kannada", sans-serif;
  --border-radius: 12px;
  --shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

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

body {
  background-color: var(--background-light);
  font-family: var(--font-display);
  color: var(--text-light);
  line-height: 1.8;
}

/* --- General & Reusable Classes --- */
.page-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
}

.header-title a {
  text-decoration: none;
  color: var(--primary-color);
}

.header-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-color);
}

.page-subtitle {
  text-align: center;
  font-family: var(--font-kannada);
  font-size: 2.2rem;
  margin: 2.5rem 0;
}

/* --- Navigation --- */
.navbar a {
  font-family: var(--font-kannada);
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  margin-left: 1.5rem;
  transition: color 0.3s;
}

.navbar a:hover,
.navbar a.active {
  color: var(--primary-color);
}

.menu-toggle {
  display: none;
  cursor: pointer;
}

.menu-toggle .bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  background-color: var(--text-light);
  transition: all 0.3s ease-in-out;
}

/* --- Category Cards --- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.category-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid var(--border-color);
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.category-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

.card-content {
  padding: 1.5rem;
}

.card-content h3 {
  font-family: var(--font-kannada);
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.card-content p {
  font-family: var(--font-kannada);
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

.start-button {
  display: inline-block;
  background-color: var(--primary-color);
  color: #fff;
  padding: 0.6rem 1.5rem;
  border-radius: 50px;
  font-weight: 700;
  font-family: var(--font-kannada);
}

/* --- How to Use Section --- */
.how-to-use {
  padding: 4rem 0;
  text-align: center;
}
.section-title {
  font-family: var(--font-kannada);
  font-size: 2rem;
  margin-bottom: 2.5rem;
}
.steps-container {
  display: flex;
  justify-content: space-around;
  gap: 2rem;
  flex-wrap: wrap;
}
.step {
  flex: 1;
  max-width: 300px;
}
.step-icon {
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  color: #fff;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 1rem;
}
.step h3 {
  font-family: var(--font-kannada);
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}
.step p {
  color: var(--text-muted);
  font-family: var(--font-kannada);
}

/* --- Footer --- */
.main-footer-section {
  text-align: center;
  padding: 2.5rem 1rem;
  margin-top: 2rem;
  border-top: 1px solid var(--border-color);
}
.footer-links-container {
  margin-bottom: 1rem;
}
.footer-links-container a {
  color: var(--text-muted);
  text-decoration: none;
  margin: 0 1rem;
  font-family: var(--font-kannada);
}
.footer-links-container a:hover {
  color: var(--primary-color);
}
.footer-copy {
  color: #aaa;
  font-size: 0.9rem;
}

/* --- Content Pages (About, Policy, etc.) --- */
.content-page {
  padding: 2rem 0;
  max-width: 800px;
  margin: 0 auto;
}
.page-title {
  font-family: var(--font-kannada);
  font-size: 2.5rem;
  margin-bottom: 2rem;
  border-bottom: 3px solid var(--primary-color);
  padding-bottom: 0.5rem;
  display: inline-block;
}
.content-subtitle {
  font-family: var(--font-kannada);
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}
.content-page p,
.content-page li {
  font-family: var(--font-kannada);
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}
.content-page ul {
  padding-left: 2rem;
}
.content-page a {
  color: var(--primary-color);
  font-weight: 700;
}

/* --- Quiz Page Styles --- */
.quiz-page-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 600px;
  margin: 0 auto;
  background: #fff;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.back-arrow {
  color: var(--text-light);
  font-size: 1.5rem;
  text-decoration: none;
}

#quiz-title {
  font-family: var(--font-kannada);
  font-size: 1.2rem;
  font-weight: 700;
}

#timer {
  background-color: var(--primary-color);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.quiz-area {
  padding: 1.5rem 1rem;
  flex-grow: 1;
  overflow-y: auto;
}

.progress-bar-container {
  width: 100%;
  background-color: #e0e0e0;
  border-radius: 50px;
  height: 8px;
  margin-bottom: 0.5rem;
}

.progress-bar {
  width: 0%;
  height: 100%;
  background-color: var(--primary-color);
  border-radius: 50px;
  transition: width 0.4s ease-in-out;
}

.question-counter {
  font-family: var(--font-display);
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.question-text {
  font-family: var(--font-kannada);
  font-size: 1.5rem;
  margin-bottom: 2rem;
}

.options-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.option-btn {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 1rem;
  font-family: var(--font-kannada);
  font-size: 1.1rem;
  text-align: left;
  background-color: #fff;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.3s;
}

.option-btn:hover:not(.disabled) {
  border-color: var(--primary-color);
  background-color: #f8f8f8;
}

.option-btn .icon {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  margin-left: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: all 0.3s;
}

.option-btn.correct {
  border-color: var(--correct-color);
  background-color: #e9f7ea;
}

.option-btn.correct .icon {
  background-color: var(--correct-color);
  border-color: var(--correct-color);
  color: #fff;
}

.option-btn.incorrect {
  border-color: var(--incorrect-color);
  background-color: #fceeed;
}

.option-btn.incorrect .icon {
  background-color: var(--incorrect-color);
  border-color: var(--incorrect-color);
  color: #fff;
}

.option-btn.disabled {
  pointer-events: none;
  opacity: 0.7;
}

/* --- Results Modal --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal-content {
  background: #fff;
  padding: 2rem;
  border-radius: var(--border-radius);
  text-align: center;
  width: 90%;
  max-width: 400px;
  position: relative;
  overflow: hidden;
}

#modal-title {
  font-family: var(--font-kannada);
  margin-bottom: 1rem;
}

#coin-award {
  margin-bottom: 1rem;
}

#coin-award i {
  font-size: 4rem;
}

#coin-award .fa-award {
  color: var(--gold-coin);
}
#coin-award .fa-medal {
  color: var(--copper-coin);
}
#coin-award .fa-trophy {
  color: var(--silver-coin);
}

#coin-award p {
  font-family: var(--font-kannada);
  font-size: 1.2rem;
  font-weight: 700;
  margin-top: 0.5rem;
}

#score-text {
  font-size: 1.1rem;
  font-family: var(--font-kannada);
  margin-bottom: 1.5rem;
}

.modal-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.modal-btn {
  text-decoration: none;
  padding: 0.8rem 1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font-kannada);
  transition: opacity 0.3s;
}

.modal-btn:hover {
  opacity: 0.85;
}

.home-btn {
  background-color: #f0f0f0;
  color: #333;
}

.restart-btn {
  background-color: var(--primary-color);
  color: #fff;
}

/* --- Confetti Celebration --- */
#celebration-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.confetti {
  width: 10px;
  height: 20px;
  position: absolute;
  opacity: 0;
  animation: fall 5s ease-in-out infinite;
}
@keyframes fall {
  0% {
    transform: translateY(-10vh) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(110vh) rotate(720deg);
    opacity: 0;
  }
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
  .navbar {
    display: none;
    position: absolute;
    top: 65px;
    right: 1rem;
    background-color: #fff;
    width: 200px;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    box-shadow: var(--shadow);
    border-radius: var(--border-radius);
    z-index: 100;
  }
  .navbar.active {
    display: flex;
  }
  .navbar a {
    margin: 0.5rem 0;
    width: 100%;
  }
  .menu-toggle {
    display: block;
  }
}

@media (min-width: 768px) {
  .modal-buttons {
    flex-direction: row;
    justify-content: center;
  }
}

/* Custom Install Button Style */
.install-btn {
  display: block;
  margin: 2rem auto;
  padding: 1rem 1.5rem;
  background-color: var(--primary-color);
  color: #fff;
  border: none;
  border-radius: 50px;
  font-family: var(--font-kannada);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

.install-btn:hover {
  transform: scale(1.05);
}