/* Shared landing-page styles for exercises and quizzes. */
/* -- Page layout -- */
.quiz-page h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-blue);
  margin-bottom: 8px;
}
.quiz-subtitle {
  font-size: 15px;
  color: var(--black-07);
  margin-bottom: 32px;
}

/* -- Hero banner -- */
.quiz-hero {
  background: linear-gradient(135deg, #323380 0%, #4748a0 58%, #634897 100%);
  padding: 24px 0 0;
  position: relative;
  overflow: hidden;
}
.quiz-hero::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(240, 154, 15, 0.08);
  pointer-events: none;
}
.quiz-hero::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  pointer-events: none;
}
.quiz-hero-head { margin-bottom: 16px; }
.quiz-hero-title-row {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.quiz-hero h1 {
  font-size: 1.85rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0;
}
.quiz-hero-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.6);
  flex-wrap: wrap;
}
.quiz-hero-meta strong { color: var(--pri-yellow); font-weight: 700; }
.quiz-hero-meta-dot { color: rgba(255, 255, 255, 0.3); }
.quiz-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(240, 154, 15, 0.18);
  border: 1px solid rgba(240, 154, 15, 0.4);
  color: #f8c55d;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 20px;
  margin-bottom: 10px;
}
/* -- Hero integrated controls -- */
.quiz-hero-controls {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.quiz-hero-search-wrap {
  flex: 1 1 260px;
  position: relative;
}
.quiz-hero-search-input {
  width: 100%;
  height: 42px;
  border: none;
  border-radius: 8px;
  padding: 0 16px 0 42px;
  font-size: 14px;
  color: #1a1a2e;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}
.quiz-hero-search-input:focus {
  outline: none;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(240, 154, 15, 0.55);
}
.quiz-hero-search-input::placeholder { color: #999; }
.quiz-hero-search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: #777;
  font-size: 14px;
}
.quiz-hero-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  flex-shrink: 0;
  margin: 0;
}
.quiz-hero-filters .quiz-filter-btn {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.28);
  color: rgba(255, 255, 255, 0.9);
}
.quiz-hero-filters .quiz-filter-btn:hover {
  background: rgba(255, 255, 255, 0.22);
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}
.quiz-hero-filters .quiz-filter-btn.active {
  background: var(--pri-yellow);
  border-color: var(--pri-yellow);
  color: #fff;
}
.quiz-hero-filters .quiz-filter-btn[data-filter="exercise"].active {
  background: #16a34a; border-color: #16a34a;
}
.quiz-hero-filters .quiz-filter-btn[data-filter="quiz"].active {
  background: #7c3aed; border-color: #7c3aed;
}
.quiz-hero-topics {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding-bottom: 20px;
}
.quiz-hero-topics .quiz-topic-chip {
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.85);
}
.quiz-hero-topics .quiz-topic-chip:hover {
  border-color: var(--pri-yellow);
  background: rgba(240, 154, 15, 0.2);
  color: #f8c55d;
}
.quiz-hero-topics .quiz-topic-chip.active {
  background: var(--pri-yellow);
  border-color: var(--pri-yellow);
  color: #fff;
}

/* -- Filter tabs -- */
.quiz-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  margin-top: 36px;
}
.quiz-filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--black-01);
  background: var(--white);
  color: var(--black-07);
  transition: all 0.18s;
}
.quiz-filter-btn:hover {
  border-color: var(--pri-yellow);
  color: var(--pri-yellow);
}
.quiz-filter-btn.active {
  background: var(--pri-yellow);
  border-color: var(--pri-yellow);
  color: #fff;
}
.quiz-filter-btn .quiz-filter-count {
  background: rgba(0, 0, 0, 0.1);
  border-radius: 20px;
  padding: 1px 7px;
  font-size: 11px;
  font-weight: 700;
}
.quiz-filter-btn.active .quiz-filter-count {
  background: rgba(255, 255, 255, 0.25);
}

.quiz-topic-chip {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--black-01);
  border-radius: 20px;
  background: rgba(0, 0, 0, 0.02);
  color: var(--black-07);
  padding: 5px 11px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

/* -- Section heading -- */
.quiz-section-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--pri-yellow);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
  margin-top: 36px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.quiz-section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--black-01);
}

/* -- Topic cards grid -- */
.quiz-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

/* -- Individual topic card -- */
.quiz-card {
  border: 1px solid var(--black-01);
  border-radius: 12px;
  background: var(--white);
  overflow: hidden;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
}
.quiz-card:hover {
  border-color: rgba(240, 154, 15, 0.4);
  box-shadow: 0 4px 16px rgba(240, 154, 15, 0.1);
}
.quiz-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px 12px;
  border-bottom: 1px solid var(--black-01);
}
.quiz-card-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 16px;
}
.quiz-card-icon.icon-yellow { background: rgba(240, 154, 15, 0.1); color: #f09a0f; }
.quiz-card-icon.icon-blue   { background: rgba(59, 130, 246, 0.1); color: #3b82f6; }
.quiz-card-icon.icon-green  { background: rgba(34, 197, 94, 0.1);  color: #22c55e; }
.quiz-card-icon.icon-purple { background: rgba(139, 92, 246, 0.1); color: #8b5cf6; }
.quiz-card-icon.icon-red    { background: rgba(239, 68, 68, 0.1);  color: #ef4444; }
.quiz-card-icon.icon-teal   { background: rgba(20, 184, 166, 0.1); color: #14b8a6; }
.quiz-card-icon.icon-orange { background: rgba(249, 115, 22, 0.1); color: #f97316; }
.quiz-card-icon.icon-pink   { background: rgba(236, 72, 153, 0.1); color: #ec4899; }

.quiz-card-meta { flex: 1; min-width: 0; }
.quiz-card-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-blue);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.quiz-card-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.quiz-badge {
  font-size: 9px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 20px;
  white-space: nowrap;
}
.quiz-badge--beginner     { background: rgba(240, 154, 15, 0.12); color: var(--pri-yellow); }
.quiz-badge--intermediate { background: rgba(59, 130, 246, 0.12); color: #3b82f6; }
.quiz-badge--advanced     { background: rgba(239, 68, 68, 0.12);  color: #ef4444; }

/* -- Card body: exercise & quiz links -- */
.quiz-card-body {
  padding: 12px 16px 14px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.quiz-link-group-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
  color: var(--black-07);
}
.quiz-link-group-label.label-exercise { color: #16a34a; }
.quiz-link-group-label.label-quiz     { color: #7c3aed; }
.quiz-link-group-label i              { margin-right: 4px; font-size: 10px; }

.quiz-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.quiz-link-pill {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  transition: all 0.15s ease;
  line-height: 1;
  text-decoration: none;
}
.quiz-link-pill.pill-exercise {
  background: rgba(34, 197, 94, 0.08);
  color: #16a34a;
  border: 1px solid rgba(34, 197, 94, 0.15);
}
.quiz-link-pill.pill-exercise:hover {
  background: #16a34a;
  color: #fff;
  border-color: #16a34a;
  text-decoration: none;
}
.quiz-link-pill.pill-quiz {
  background: rgba(139, 92, 246, 0.08);
  color: #7c3aed;
  border: 1px solid rgba(139, 92, 246, 0.15);
}
.quiz-link-pill.pill-quiz:hover {
  background: #7c3aed;
  color: #fff;
  border-color: #7c3aed;
  text-decoration: none;
}
.quiz-link-pill .pill-num {
  font-size: 10px;
  opacity: 0.7;
  font-weight: 700;
}

/* coming soon pill */
.quiz-link-pill.pill-soon {
  background: rgba(0,0,0,0.03);
  color: var(--black-07);
  border: 1px solid var(--black-01);
  cursor: default;
  opacity: 0.5;
  pointer-events: none;
}

/* -- Empty state -- */
.quiz-empty {
  text-align: center;
  padding: 48px 20px;
  color: var(--black-07);
  font-size: 15px;
  display: none;
}
.quiz-empty i {
  font-size: 2.5rem;
  margin-bottom: 12px;
  opacity: 0.3;
  display: block;
}

/* -- Dark theme -- */
[data-theme="dark"] .quiz-card {
  background: var(--black);
  border-color: rgba(255, 255, 255, 0.1);
}
[data-theme="dark"] .quiz-card:hover {
  border-color: rgba(240, 154, 15, 0.4);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}
[data-theme="dark"] .quiz-card-header {
  border-bottom-color: rgba(255, 255, 255, 0.08);
}
[data-theme="dark"] .quiz-card-title {
  color: var(--white);
}
[data-theme="dark"] .quiz-card-icon.icon-yellow { background: rgba(240, 154, 15, 0.15); }
[data-theme="dark"] .quiz-card-icon.icon-blue   { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
[data-theme="dark"] .quiz-card-icon.icon-green  { background: rgba(34, 197, 94, 0.15); }
[data-theme="dark"] .quiz-card-icon.icon-purple { background: rgba(139, 92, 246, 0.15); }
[data-theme="dark"] .quiz-card-icon.icon-teal   { background: rgba(20, 184, 166, 0.15); }
[data-theme="dark"] .quiz-card-icon.icon-orange { background: rgba(249, 115, 22, 0.15); }
[data-theme="dark"] .quiz-card-icon.icon-pink   { background: rgba(236, 72, 153, 0.15); }
[data-theme="dark"] .quiz-link-pill.pill-exercise { background: rgba(34, 197, 94, 0.12); border-color: rgba(34, 197, 94, 0.2); }
[data-theme="dark"] .quiz-link-pill.pill-quiz { background: rgba(139, 92, 246, 0.12); border-color: rgba(139, 92, 246, 0.2); }
body.dark-theme .quiz-card { background: #1a1a2e; border-color: rgba(255, 255, 255, 0.1); }
body.dark-theme .quiz-card:hover { border-color: rgba(240, 154, 15, 0.4); box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3); }
body.dark-theme .quiz-card-header { border-bottom-color: rgba(255, 255, 255, 0.08); }
body.dark-theme .quiz-card-title { color: #ffffff; }
body.dark-theme .quiz-link-pill.pill-exercise { background: rgba(34, 197, 94, 0.12); border-color: rgba(34, 197, 94, 0.2); }
body.dark-theme .quiz-link-pill.pill-quiz { background: rgba(139, 92, 246, 0.12); border-color: rgba(139, 92, 246, 0.2); }
[data-theme="dark"] .quiz-filter-btn {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.65);
}
[data-theme="dark"] .quiz-filter-btn:hover {
  border-color: var(--pri-yellow);
  color: var(--pri-yellow);
}
[data-theme="dark"] .quiz-section-label::after {
  background: rgba(255, 255, 255, 0.08);
}
[data-theme="dark"] .quiz-page h1 {
  color: var(--white);
}
[data-theme="dark"] .quiz-link-pill.pill-soon {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.4);
}


/* -- Intro box -- */
.quiz-intro {
  font-size: 15px;
  color: var(--black-07);
  line-height: 1.7;
  margin-bottom: 0;
  padding: 20px 24px;
  background: rgba(240, 154, 15, 0.04);
  border-radius: 10px;
  border: 1px solid var(--black-01);
}
.quiz-intro p { margin-bottom: 8px; }
.quiz-intro p:last-child { margin-bottom: 0; }
[data-theme="dark"] .quiz-intro {
  background: rgba(240, 154, 15, 0.06);
  border-color: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
}

/* -- Start CTA buttons -- */
.quiz-start-btn {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 11.5px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.18s, box-shadow 0.18s;
  margin-top: auto;
}
.quiz-start-btn.btn-exercise {
  background: #16a34a;
  color: #fff;
}
.quiz-start-btn.btn-exercise:hover {
  background: #15803d;
  box-shadow: 0 2px 8px rgba(22, 163, 74, 0.3);
  color: #fff;
}
.quiz-start-btn.btn-quiz {
  background: #7c3aed;
  color: #fff;
}
.quiz-start-btn.btn-quiz:hover {
  background: #6d28d9;
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.3);
  color: #fff;
}
.quiz-filter-btn[data-filter="exercise"].active {
  background: #16a34a;
  border-color: #16a34a;
}
.quiz-filter-btn[data-filter="quiz"].active {
  background: #7c3aed;
  border-color: #7c3aed;
}

/* -- Responsive -- */
@media (max-width: 576px) {
  .quiz-hero {
    padding: 16px 0 0;
  }
  .quiz-hero::before,
  .quiz-hero::after {
    display: none;
  }
  .quiz-hero h1 {
    font-size: 1.35rem;
  }
  .quiz-hero-title-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .quiz-hero-meta {
    font-size: 11.5px;
    gap: 6px;
  }
  .quiz-hero-controls {
    display: block;
    margin-bottom: 10px;
  }
  .quiz-hero-search-wrap {
    width: 100%;
    margin-bottom: 10px;
  }
  .quiz-hero-search-input {
    height: 38px;
    font-size: 13px;
  }
  .quiz-hero-filters {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }
  .quiz-hero-filters .quiz-filter-btn {
    width: 100%;
    justify-content: center;
    padding: 7px 8px;
    font-size: 11px;
    gap: 4px;
  }
  .quiz-hero-filters .quiz-filter-btn .quiz-filter-count {
    font-size: 10px;
    padding: 1px 5px;
  }
  .quiz-hero-topics {
    gap: 6px;
    padding-bottom: 14px;
  }
  .quiz-topic-chip {
    font-size: 10.5px;
    padding: 4px 8px;
  }
  .quiz-grid { grid-template-columns: 1fr; }
  .quiz-page h1 { font-size: 1.5rem; }
}