:root {
  --teal:        #3a9e8f;
  --teal-dark:   #2d7e72;
  --teal-light:  #e8f5f3;
  --teal-mid:    #c2e8e2;
  --correct:     #27ae60;
  --wrong:       #e74c3c;
  --card-shadow: 0 2px 18px rgba(0, 0, 0, 0.07);
  --border:      #dde5e3;
}


body {
  font-family: 'Source Sans 3', sans-serif;
  background-color: #f4f7f6;
  color: #1a1a1a;
}

.htl-abbr {
  font-size: 28px;
  font-weight: 900;
  letter-spacing: 1.5px;
  line-height: 1;
  color: #1a1a1a;
}
.htl-subtext {
  font-size: 11.5px;
  line-height: 1.45;
  color: #444;
  padding-top: 2px;
}

.timer-display,
.time-display {
  color: var(--teal-dark);
  font-weight: 600;
}

.hero-banner {
  background: var(--teal);
  padding: 28px 48px;
  display: flex;
  align-items: center;
}
.hero-title {
  text-align: center;
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  font-weight: 700;
  color: #fff;
  margin: 0;
  letter-spacing: 0.02em;
}
.hero-banner-img {
  max-height: 80px;
  object-fit: contain;
  border-radius: 6px;
}

.quiz-card {
  border: 1px solid var(--border);
  border-radius: 12px !important;
  box-shadow: var(--card-shadow);
  overflow: hidden;
}
.section-header {
  background: var(--teal-light);
  border-bottom: 2px solid var(--teal-mid);
  color: var(--teal-dark);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 12px 20px;
}

.bg-teal          { background-color: var(--teal) !important; }
.text-teal        { color: var(--teal) !important; }
.border-teal      { border-color: var(--teal) !important; }

.btn-teal {
  background-color: var(--teal);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-family: 'Source Sans 3', sans-serif;
  transition: background-color 0.18s, transform 0.1s;
}
.btn-teal:hover  { background-color: var(--teal-dark); color: #fff; }
.btn-teal:active { transform: scale(0.98); }
.btn-teal:disabled {
  background-color: var(--teal);
  opacity: 0.4;
  color: #fff;
}

.btn-outline-teal {
  border: 2px solid var(--teal);
  color: var(--teal-dark);
  background: transparent;
  border-radius: 8px;
  font-weight: 600;
  font-family: 'Source Sans 3', sans-serif;
  transition: background-color 0.18s;
}
.btn-outline-teal:hover { background-color: var(--teal-light); color: var(--teal-dark); }

.progress-bar.bg-teal { background-color: var(--teal) !important; }
.badge.bg-teal        { background-color: var(--teal) !important; font-weight: 600; }

.name-input {
  border: 2px solid var(--border);
  border-radius: 8px;
  font-family: 'Source Sans 3', sans-serif;
  font-size: 1rem;
  transition: border-color 0.18s, box-shadow 0.18s;
}
.name-input:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(58, 158, 143, 0.18);
  outline: none;
}
.name-input.is-invalid { border-color: var(--wrong); }

.video-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #111;
  border-radius: 8px;
  overflow: hidden;
}
.video-wrapper video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.video-placeholder {
  position: absolute;
  inset: 0;
  background: #111;
  color: #aaa;
  font-size: 0.875rem;
  text-align: center;
  padding: 16px;
}
.video-wrapper.has-video .video-placeholder { display: none !important; }

.pdf-wrapper {
  position: relative;
  width: 100%;
  height: 520px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.pdf-placeholder {
  position: absolute;
  inset: 0;
  background: var(--teal-light);
  color: #666;
  font-size: 0.875rem;
  text-align: center;
  padding: 16px;
  border-radius: 8px;
}
.pdf-wrapper.has-pdf .pdf-placeholder { display: none !important; }

.question-text {
  line-height: 1.55;
  color: #1a1a1a;
}

.answer-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: 9px;
  text-align: left;
  font-size: 0.95rem;
  font-family: 'Source Sans 3', sans-serif;
  color: #1a1a1a;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  width: 100%;
}
.answer-btn:hover:not(:disabled) {
  border-color: var(--teal);
  background: var(--teal-light);
}
.answer-btn:disabled { cursor: default; }

.answer-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  min-width: 30px;
  border-radius: 50%;
  background: var(--teal-light);
  color: var(--teal-dark);
  font-weight: 700;
  font-size: 0.82rem;
  transition: background 0.15s, color 0.15s;
}

.answer-btn.correct              { border-color: var(--correct); background: #eafaf1; }
.answer-btn.correct .answer-letter { background: var(--correct); color: #fff; }

.answer-btn.wrong                { border-color: var(--wrong); background: #fdf0ef; }
.answer-btn.wrong .answer-letter { background: var(--wrong); color: #fff; }

.feedback-bubble {
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
}
.feedback-bubble.correct { background: #eafaf1; color: var(--correct); }
.feedback-bubble.wrong   { background: #fdf0ef; color: var(--wrong); }

.score-circle {
  position: relative;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1.15;
  background: conic-gradient(
    var(--teal) 0deg,
    var(--teal) calc(var(--progress) * 1%),
    rgba(58, 158, 143, 0.2) calc(var(--progress) * 1%),
    rgba(58, 158, 143, 0.2) 360deg
  );
  --progress: 0;
}
.score-circle::after {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  background: #fff;
  z-index: 0;
}
.score-circle > * {
  position: relative;
  z-index: 1;
}
.score-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--teal-dark);
}
.score-pct {
  font-size: 0.8rem;
  color: #888;
}

.qr-box {
  display: inline-block;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  max-width: 140px;
}

.qr-box #qrcode {
  width: 120px;
  height: 120px;
  margin: 0 auto;
}

.qr-link:hover {
  opacity: 0.9;
}

footer {
  font-size: 0.8rem;
  color: #999;
}

@media (max-width: 576px) {
  .hero-banner { padding: 20px; }
  .hero-title  { font-size: 1.2rem; }
}