/* =============================================
   QuizBlast — Smart Quiz Game Stylesheet
   Theme: Playful, colorful, high-school friendly
   ============================================= */

/* ---------- CSS Variables ---------- */
:root {
  --c-yellow:   #FFD93D;
  --c-orange:   #FF6B35;
  --c-pink:     #FF4D9E;
  --c-purple:   #7C3AED;
  --c-blue:     #3B82F6;
  --c-green:    #10B981;
  --c-red:      #EF4444;
  --c-white:    #FFFFFF;
  --c-bg:       #F0EDFF;
  --c-card:     #FFFFFF;
  --c-text:     #1E1B4B;
  --c-muted:    #6B7280;
  --c-border:   #E5E7EB;
  --c-correct:  #10B981;
  --c-wrong:    #EF4444;

  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  24px;
  --radius-xl:  32px;

  --shadow-card: 0 8px 32px rgba(124,58,237,0.10), 0 2px 8px rgba(0,0,0,0.06);
  --shadow-btn:  0 4px 14px rgba(124,58,237,0.25);
  --font-display: 'Fredoka One', cursive;
  --font-body:    'Nunito', sans-serif;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--c-bg);
  color: var(--c-text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ---------- Screens ---------- */
.screen {
  display: none;
  min-height: 100vh;
  position: relative;
  overflow: hidden;
}
.screen.active { display: flex; flex-direction: column; align-items: center; justify-content: center; }

/* ---------- Blobs (background decoration) ---------- */
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
}
.blob-1 { width: 400px; height: 400px; background: var(--c-purple); top: -120px; left: -120px; }
.blob-2 { width: 320px; height: 320px; background: var(--c-pink);   bottom: -80px;  right: -80px; }
.blob-3 { width: 260px; height: 260px; background: var(--c-yellow); top: 40%;  left: 60%; }

/* ---------- Logo ---------- */
.logo {
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: var(--c-purple);
  letter-spacing: 1px;
  margin-bottom: 1rem;
}
.logo.small { font-size: 1.4rem; margin-bottom: 0; }

/* ---------- Top Bar ---------- */
.top-bar {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: var(--c-white);
  border-bottom: 2px solid var(--c-border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.student-info {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--c-purple);
  background: #EDE9FE;
  padding: 6px 14px;
  border-radius: 100px;
}
.quiz-meta { display: flex; align-items: center; gap: 12px; font-weight: 700; color: var(--c-muted); }
.score-chip {
  background: var(--c-yellow);
  color: var(--c-text);
  font-size: 0.85rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: 100px;
  letter-spacing: 0.5px;
}

/* ---------- Landing Card ---------- */
.landing-card {
  background: var(--c-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: 3rem 2.5rem;
  max-width: 460px;
  width: 92%;
  text-align: center;
  position: relative;
  z-index: 1;
  animation: slideUp 0.5s ease;
}
.landing-card h1 {
  font-family: var(--font-display);
  font-size: 1.9rem;
  color: var(--c-text);
  margin-bottom: 0.5rem;
  line-height: 1.2;
}
.subtitle {
  color: var(--c-muted);
  font-size: 1rem;
  margin-bottom: 1.75rem;
  font-weight: 600;
}

/* ---------- Form ---------- */
.form-group { text-align: left; margin-bottom: 1.1rem; }
.form-group label {
  display: block;
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--c-text);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--c-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-text);
  outline: none;
  transition: border-color 0.2s;
  background: #FAFAFA;
}
.form-group input:focus { border-color: var(--c-purple); background: var(--c-white); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 13px 32px;
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  border: none;
  transition: transform 0.15s, box-shadow 0.15s;
  letter-spacing: 0.3px;
}
.btn:hover  { transform: translateY(-2px); }
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--c-purple);
  color: var(--c-white);
  box-shadow: var(--shadow-btn);
  width: 100%;
  margin-top: 0.75rem;
  font-size: 1.05rem;
}
.btn-primary:hover { box-shadow: 0 6px 20px rgba(124,58,237,0.4); }
.btn-secondary {
  background: var(--c-white);
  color: var(--c-purple);
  border: 2px solid var(--c-purple);
}
.btn-next {
  background: var(--c-orange);
  color: var(--c-white);
  box-shadow: 0 4px 14px rgba(255,107,53,0.3);
  margin-top: 1.5rem;
  padding: 12px 28px;
  font-size: 0.95rem;
}
.btn-next:hover { box-shadow: 0 6px 20px rgba(255,107,53,0.45); }
.hidden { display: none !important; }

/* ---------- Error ---------- */
.error-msg { color: var(--c-red); font-size: 0.85rem; font-weight: 700; margin-top: 0.5rem; min-height: 18px; }

/* ---------- Pack Selection ---------- */
.packs-container {
  padding: 2.5rem 1.5rem;
  max-width: 900px;
  width: 100%;
  z-index: 1;
  position: relative;
  animation: slideUp 0.4s ease;
}
.packs-container h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--c-text);
  margin-bottom: 0.4rem;
  text-align: center;
}
.packs-container .subtitle { text-align: center; }
.packs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

/* ---------- Pack Card ---------- */
.pack-card {
  background: var(--c-white);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  cursor: pointer;
  border: 3px solid transparent;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.pack-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 5px;
  background: var(--pack-color, var(--c-purple));
}
.pack-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(0,0,0,0.12); border-color: var(--pack-color, var(--c-purple)); }
.pack-card .pack-icon { font-size: 2.8rem; margin-bottom: 0.75rem; display: block; }
.pack-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--c-text);
  margin-bottom: 0.3rem;
}
.pack-card p { font-size: 0.85rem; color: var(--c-muted); font-weight: 600; }
.pack-card .pack-badge {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--c-white);
  background: var(--pack-color, var(--c-purple));
}

/* ---------- Quiz Screen ---------- */
.quiz-container {
  max-width: 680px;
  width: 92%;
  padding: 2rem 0 3rem;
  animation: slideUp 0.35s ease;
}

/* Progress bar */
.progress-bar-wrap {
  height: 10px;
  background: #E5E7EB;
  border-radius: 100px;
  margin-bottom: 1rem;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--c-purple), var(--c-pink));
  border-radius: 100px;
  transition: width 0.4s ease;
  width: 0%;
}

.question-counter { font-size: 0.85rem; font-weight: 800; color: var(--c-muted); margin-bottom: 1rem; letter-spacing: 0.5px; text-transform: uppercase; }

/* Question Card */
.question-card {
  background: var(--c-white);
  border-radius: var(--radius-xl);
  padding: 2.25rem 2rem 2rem;
  box-shadow: var(--shadow-card);
  position: relative;
}
.question-type-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 1rem;
}
.badge-mc   { background: #EDE9FE; color: var(--c-purple); }
.badge-tf   { background: #FEF3C7; color: #92400E; }

.question-card h2 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--c-text);
  line-height: 1.45;
  margin-bottom: 1.5rem;
}

/* Options */
.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
.options-grid.two-options { grid-template-columns: 1fr 1fr; }

.option-btn {
  padding: 1rem 1.2rem;
  border-radius: var(--radius-md);
  border: 2.5px solid var(--c-border);
  background: #FAFAFA;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-text);
  cursor: pointer;
  text-align: left;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.35;
}
.option-btn .option-letter {
  min-width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--c-border);
  color: var(--c-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 800;
  transition: all 0.15s;
  flex-shrink: 0;
}
.option-btn:hover:not([disabled]) {
  border-color: var(--c-purple);
  background: #F5F3FF;
}
.option-btn:hover:not([disabled]) .option-letter {
  background: var(--c-purple);
  color: var(--c-white);
}
.option-btn.selected { border-color: var(--c-purple); background: #EDE9FE; }
.option-btn.correct  { border-color: var(--c-correct) !important; background: #D1FAE5 !important; color: #065F46; }
.option-btn.wrong    { border-color: var(--c-wrong)   !important; background: #FEE2E2 !important; color: #7F1D1D; }
.option-btn.correct .option-letter { background: var(--c-correct); color: var(--c-white); }
.option-btn.wrong   .option-letter { background: var(--c-wrong);   color: var(--c-white); }
.option-btn[disabled] { cursor: default; }

/* ---------- Results Screen ---------- */
.results-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem 1rem;
  position: relative;
  z-index: 1;
  width: 100%;
  animation: slideUp 0.4s ease;
}
.results-card {
  background: var(--c-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: 2.5rem 2rem;
  max-width: 580px;
  width: 100%;
  text-align: center;
}
.trophy { font-size: 4rem; margin-bottom: 0.5rem; animation: bounce 0.6s ease; }
.results-card h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--c-text);
  margin-bottom: 0.4rem;
}
.results-card > p { color: var(--c-muted); font-weight: 600; margin-bottom: 1.5rem; font-size: 1rem; }

.score-display {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
}
.score-big { font-family: var(--font-display); font-size: 3.5rem; color: var(--c-purple); line-height: 1; }
.score-pct {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--c-muted);
}

/* Answers Review */
.answers-review {
  text-align: left;
  margin-bottom: 2rem;
  max-height: 360px;
  overflow-y: auto;
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 1rem;
}
.answers-review h3 {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--c-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.75rem;
}
.review-item {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--c-border);
}
.review-item:last-child { border-bottom: none; }
.review-item .review-q { font-size: 0.9rem; font-weight: 700; color: var(--c-text); margin-bottom: 4px; }
.review-item .review-answer {
  font-size: 0.82rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}
.review-item .review-answer.correct { color: var(--c-correct); }
.review-item .review-answer.wrong   { color: var(--c-wrong); }
.review-item .review-correct-ans { font-size: 0.8rem; color: var(--c-muted); margin-top: 2px; font-weight: 600; }

.results-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; justify-content: center; }
.results-actions .btn { flex: 1; min-width: 150px; }

/* ---------- Animations ---------- */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes bounce {
  0%   { transform: scale(0.5); opacity: 0; }
  60%  { transform: scale(1.2); }
  100% { transform: scale(1);   opacity: 1; }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.04); }
}
.option-btn.correct { animation: pulse 0.4s ease; }

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .options-grid { grid-template-columns: 1fr; }
  .landing-card { padding: 2rem 1.5rem; }
  .question-card { padding: 1.5rem 1.25rem; }
  .question-card h2 { font-size: 1.1rem; }
  .top-bar { padding: 0.75rem 1rem; }
  .packs-container { padding: 1.5rem 1rem; }
  .results-card { padding: 2rem 1.25rem; }
  .results-actions { flex-direction: column; }
}

/* ---------- Loading Overlay ---------- */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(240, 237, 255, 0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 20;
  gap: 1rem;
  font-weight: 700;
  color: var(--c-purple);
  font-size: 1rem;
}
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid #E9D5FF;
  border-top-color: var(--c-purple);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Error Toast ---------- */
.error-toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #1E1B4B;
  color: #fff;
  padding: 12px 24px;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 700;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 100;
  white-space: nowrap;
  pointer-events: none;
}
.error-toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------- How to Play Button ---------- */
.btn-howtoplay {
  background: none;
  border: none;
  color: var(--c-muted);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 0.75rem;
  padding: 4px 0;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
}
.btn-howtoplay:hover { color: var(--c-purple); }

/* ---------- Modal ---------- */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(30, 27, 75, 0.55);
  z-index: 50;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  backdrop-filter: blur(3px);
}
.modal-backdrop.open { display: flex; animation: fadeIn 0.2s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-card {
  background: var(--c-white);
  border-radius: var(--radius-xl);
  padding: 2rem 1.75rem;
  max-width: 480px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: slideUp 0.3s ease;
}
.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: #F3F4F6;
  border: none;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--c-muted);
  font-weight: 700;
  transition: background 0.2s;
}
.modal-close:hover { background: #E5E7EB; }
.modal-logo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--c-purple);
  margin-bottom: 1.5rem;
}

/* Steps */
.htp-steps { display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.5rem; }
.htp-step {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.85rem 1rem;
  background: #F9F8FF;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--c-purple);
}
.htp-icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }
.htp-step strong { display: block; font-size: 0.95rem; color: var(--c-text); margin-bottom: 3px; }
.htp-step p { font-size: 0.85rem; color: var(--c-muted); font-weight: 600; line-height: 1.4; margin: 0; }

/* Ratings */
.htp-ratings {
  background: #FFF9EC;
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.5rem;
}
.htp-ratings-title {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--c-muted);
  margin-bottom: 0.6rem;
}
.htp-rating-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--c-text);
  padding: 3px 0;
}