/**
 * ExamCare.org - Free Online Quizzes System Stylesheet
 * 10-Question Engine, Category Hubs, Single Quiz Interface & Analytics
 */

:root {
  --fq-primary: #2563eb;
  --fq-primary-dark: #1d4ed8;
  --fq-primary-light: #eff6ff;
  --fq-success: #16a34a;
  --fq-success-light: #dcfce7;
  --fq-warning: #d97706;
  --fq-warning-light: #fef3c7;
  --fq-danger: #dc2626;
  --fq-danger-light: #fee2e2;
  --fq-dark: #0f172a;
  --fq-text: #1e293b;
  --fq-muted: #64748b;
  --fq-border: #e2e8f0;
  --fq-bg-alt: #f8fafc;
  --fq-radius: 12px;
  --fq-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --fq-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
}

/* Base Wrapper */
.fq-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px;
  box-sizing: border-box;
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--fq-text);
}

/* Hero Section */
.fq-hero {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  color: #ffffff;
  padding: 48px 24px;
  border-radius: var(--fq-radius);
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--fq-shadow-lg);
}

.fq-hero::after {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(37,99,235,0.2) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.fq-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(37,99,235,0.25);
  border: 1px solid rgba(147,197,253,0.3);
  color: #93c5fd;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.fq-hero-title {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 12px 0;
  color: #ffffff;
}

.fq-hero-subtitle {
  font-size: 16px;
  line-height: 1.6;
  color: #cbd5e1;
  max-width: 720px;
  margin: 0 0 24px 0;
}

.fq-hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.fq-hero-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #e2e8f0;
  font-weight: 500;
}

.fq-hero-feature-item svg {
  color: #38bdf8;
}

/* Category Grid */
.fq-section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 20px;
  border-bottom: 2px solid #e2e8f0;
  padding-bottom: 12px;
}

.fq-section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--fq-dark);
  margin: 0;
}

.fq-section-subtitle {
  font-size: 14px;
  color: var(--fq-muted);
  margin-top: 4px;
}

.fq-cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.fq-cat-card {
  background: #ffffff;
  border: 1px solid var(--fq-border);
  border-radius: var(--fq-radius);
  padding: 20px;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--fq-shadow);
}

.fq-cat-card:hover {
  transform: translateY(-3px);
  border-color: var(--fq-primary);
  box-shadow: var(--fq-shadow-lg);
}

.fq-cat-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.fq-cat-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.fq-cat-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--fq-dark);
  margin: 0;
}

.fq-cat-desc {
  font-size: 13px;
  line-height: 1.5;
  color: var(--fq-muted);
  margin: 0 0 16px 0;
  flex-grow: 1;
}

.fq-cat-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 600;
  color: var(--fq-primary);
  padding-top: 12px;
  border-top: 1px solid var(--fq-border);
}

/* Exam Pills & Filter Tabs */
.fq-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.fq-tab-btn {
  padding: 8px 16px;
  background: var(--fq-bg-alt);
  border: 1px solid var(--fq-border);
  border-radius: 20px;
  color: var(--fq-text);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.fq-tab-btn:hover {
  background: #e2e8f0;
  color: var(--fq-dark);
}

.fq-tab-btn.active {
  background: var(--fq-primary);
  color: #ffffff;
  border-color: var(--fq-primary);
}

/* Quiz Cards Grid */
.fq-quiz-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.fq-quiz-card {
  background: #ffffff;
  border: 1px solid var(--fq-border);
  border-radius: var(--fq-radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: all 0.2s ease;
  box-shadow: var(--fq-shadow);
  position: relative;
}

.fq-quiz-card:hover {
  border-color: #93c5fd;
  box-shadow: var(--fq-shadow-lg);
  transform: translateY(-2px);
}

.fq-quiz-badges {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.fq-badge {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 8px;
  border-radius: 4px;
}

.fq-badge-exam {
  background: var(--fq-primary-light);
  color: var(--fq-primary);
}

.fq-badge-subject {
  background: #f1f5f9;
  color: #475569;
}

.fq-badge-difficulty {
  font-size: 11px;
}
.fq-badge-difficulty.easy { background: var(--fq-success-light); color: var(--fq-success); }
.fq-badge-difficulty.medium { background: var(--fq-warning-light); color: var(--fq-warning); }
.fq-badge-difficulty.hard { background: var(--fq-danger-light); color: var(--fq-danger); }

.fq-quiz-title {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 10px 0;
  color: var(--fq-dark);
}

.fq-quiz-title a {
  color: inherit;
  text-decoration: none;
}

.fq-quiz-title a:hover {
  color: var(--fq-primary);
}

.fq-quiz-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--fq-muted);
  margin-bottom: 18px;
}

.fq-quiz-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.fq-quiz-btn {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--fq-primary);
  color: #ffffff;
  padding: 10px 16px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transition: background 0.2s ease;
}

.fq-quiz-btn:hover {
  background: var(--fq-primary-dark);
  color: #ffffff;
}

/* =========================================================
   SINGLE QUIZ INTERACTIVE VIEW (10-QUESTION ENGINE)
   ========================================================= */
.fq-quiz-viewport {
  background: #ffffff;
  border: 1px solid var(--fq-border);
  border-radius: var(--fq-radius);
  box-shadow: var(--fq-shadow-lg);
  overflow: hidden;
  margin-bottom: 30px;
}

.fq-viewport-header {
  background: #0f172a;
  color: #ffffff;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.fq-vh-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.fq-vh-title {
  font-size: 16px;
  font-weight: 700;
  margin: 0;
  color: #ffffff;
}

.fq-timer-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 6px 14px;
  border-radius: 20px;
  font-family: monospace;
  font-size: 16px;
  font-weight: 700;
  color: #38bdf8;
}

.fq-timer-badge.warning {
  background: rgba(220, 38, 38, 0.2);
  border-color: #dc2626;
  color: #f87171;
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.04); }
  100% { transform: scale(1); }
}

.fq-progress-bar-container {
  height: 6px;
  background: #334155;
  width: 100%;
}

.fq-progress-bar-fill {
  height: 100%;
  background: #38bdf8;
  width: 10%;
  transition: width 0.3s ease;
}

/* Question Body */
.fq-question-container {
  padding: 30px 28px;
}

.fq-q-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
  font-size: 13px;
  color: var(--fq-muted);
}

.fq-q-number {
  font-size: 14px;
  font-weight: 700;
  color: var(--fq-primary);
}

.fq-lang-toggle-btn {
  background: var(--fq-bg-alt);
  border: 1px solid var(--fq-border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  color: var(--fq-text);
}

.fq-q-text {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--fq-dark);
  margin-bottom: 24px;
}

/* Options */
.fq-options-list {
  display: grid;
  gap: 12px;
  margin-bottom: 28px;
}

.fq-option-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border: 2px solid var(--fq-border);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.fq-option-item:hover {
  border-color: #93c5fd;
  background: #f8fafc;
}

.fq-option-item.selected {
  border-color: var(--fq-primary);
  background: var(--fq-primary-light);
}

.fq-opt-key {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #e2e8f0;
  color: #334155;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
  transition: all 0.15s ease;
}

.fq-option-item.selected .fq-opt-key {
  background: var(--fq-primary);
  color: #ffffff;
}

.fq-opt-text {
  font-size: 16px;
  color: var(--fq-text);
  line-height: 1.5;
  flex-grow: 1;
}

/* Question Palette (1-10) */
.fq-palette {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 28px;
  background: var(--fq-bg-alt);
  border-top: 1px solid var(--fq-border);
  border-bottom: 1px solid var(--fq-border);
}

.fq-palette-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--fq-border);
  background: #ffffff;
  color: var(--fq-text);
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

.fq-palette-btn:hover {
  border-color: var(--fq-primary);
}

.fq-palette-btn.current {
  border-color: var(--fq-primary);
  box-shadow: 0 0 0 2px rgba(37,99,235,0.3);
}

.fq-palette-btn.answered {
  background: var(--fq-success);
  border-color: var(--fq-success);
  color: #ffffff;
}

/* Action Controls */
.fq-controls {
  padding: 18px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.fq-btn-secondary {
  padding: 10px 20px;
  background: #ffffff;
  border: 1px solid var(--fq-border);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--fq-text);
  cursor: pointer;
  transition: background 0.15s ease;
}

.fq-btn-secondary:hover {
  background: #f1f5f9;
}

.fq-btn-primary {
  padding: 10px 24px;
  background: var(--fq-primary);
  border: 1px solid var(--fq-primary);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  cursor: pointer;
  transition: background 0.15s ease;
}

.fq-btn-primary:hover {
  background: var(--fq-primary-dark);
}

.fq-btn-submit {
  padding: 10px 26px;
  background: var(--fq-success);
  border: 1px solid var(--fq-success);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  cursor: pointer;
}

.fq-btn-submit:hover {
  background: #15803d;
}

/* Results & Review View */
.fq-results-container {
  padding: 32px 24px;
}

.fq-score-card {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  padding: 32px 24px;
  border-radius: var(--fq-radius);
  text-align: center;
  margin-bottom: 32px;
}

.fq-score-circle {
  font-size: 48px;
  font-weight: 800;
  color: #38bdf8;
  margin-bottom: 8px;
}

.fq-score-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 16px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.fq-score-stat-box {
  background: rgba(255,255,255,0.06);
  padding: 12px;
  border-radius: 8px;
}

.fq-score-stat-label {
  font-size: 12px;
  color: #94a3b8;
  text-transform: uppercase;
  font-weight: 600;
}

.fq-score-stat-val {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-top: 4px;
}

/* Detailed Solutions Review */
.fq-review-list {
  display: grid;
  gap: 24px;
  margin-top: 28px;
}

.fq-review-item {
  background: #ffffff;
  border: 1px solid var(--fq-border);
  border-radius: var(--fq-radius);
  padding: 24px;
  box-shadow: var(--fq-shadow);
}

.fq-review-item.is-correct {
  border-left: 5px solid var(--fq-success);
}

.fq-review-item.is-incorrect {
  border-left: 5px solid var(--fq-danger);
}

.fq-review-item.is-unanswered {
  border-left: 5px solid var(--fq-warning);
}

.fq-review-status-badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.fq-review-status-badge.correct { background: var(--fq-success-light); color: var(--fq-success); }
.fq-review-status-badge.incorrect { background: var(--fq-danger-light); color: var(--fq-danger); }
.fq-review-status-badge.unanswered { background: var(--fq-warning-light); color: var(--fq-warning); }

.fq-explanation-box {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 16px;
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.6;
}

.fq-explanation-title {
  font-weight: 700;
  color: var(--fq-dark);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Breadcrumbs */
.fq-breadcrumbs {
  font-size: 13px;
  color: var(--fq-muted);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.fq-breadcrumbs a {
  color: var(--fq-primary);
  text-decoration: none;
}

.fq-breadcrumbs a:hover {
  text-decoration: underline;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .fq-hero {
    padding: 28px 16px;
  }
  .fq-hero-title {
    font-size: 24px;
  }
  .fq-quiz-grid, .fq-cat-grid {
    grid-template-columns: 1fr;
  }
  .fq-question-container {
    padding: 20px 16px;
  }
  .fq-palette {
    padding: 12px 16px;
  }
  .fq-controls {
    padding: 14px 16px;
  }
  .fq-score-circle {
    font-size: 36px;
  }
}