/* =====================================================
   QUIZ PAGE STYLESHEET
   College of Engineering Technology | Cybersecurity Dept.
   ===================================================== */

/* ---- NAV ACTIVE STATE ---- */
.nav-active {
  color: var(--accent) !important;
  background: rgba(0, 212, 170, 0.1) !important;
  border-radius: 8px;
}

/* ---- NAV TOGGLE (mobile) ---- */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--muted);
  border-radius: 2px;
  transition: background 0.2s;
}
.nav-toggle:hover span { background: var(--accent); }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .header-nav {
    display: none;
    position: absolute;
    top: 68px;
    right: 0;
    left: 0;
    background: rgba(10, 15, 30, 0.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 12px 16px;
    gap: 4px;
    z-index: 99;
  }
  .header-nav.open { display: flex; }
  .header-nav a { padding: 10px 14px; font-size: 0.9rem; }
}

/* =====================================================
   QUIZ HERO
   ===================================================== */
.quiz-hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 56px;
  background: radial-gradient(ellipse 70% 60% at 50% 0%, rgba(0, 212, 170, 0.12) 0%, transparent 70%);
}
.quiz-hero-bg { position: absolute; inset: 0; pointer-events: none; }
.qh-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.2;
}
.qh-shape.s1 { width: 350px; height: 350px; background: var(--accent); top: -80px; left: -60px; }
.qh-shape.s2 { width: 280px; height: 280px; background: var(--accent2); bottom: -60px; right: -40px; }
.qh-shape.s3 { width: 180px; height: 180px; background: var(--accent3); top: 30%; right: 35%; }

.quiz-hero-content { position: relative; text-align: center; }
.quiz-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.3);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.quiz-hero-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 14px;
  line-height: 1.2;
}
.quiz-hero-desc {
  color: var(--muted);
  font-size: 1rem;
  max-width: 520px;
  margin: 0 auto;
}

/* =====================================================
   MAIN QUIZ WRAPPER
   ===================================================== */
.quiz-main {
  padding: 48px 0 80px;
  min-height: 60vh;
}

.quiz-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---- Screen visibility ---- */
.quiz-screen { display: none; }
.quiz-screen.active { display: block; }

/* =====================================================
   START SCREEN
   ===================================================== */
.quiz-start-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px 40px;
  text-align: center;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
  position: relative;
  overflow: hidden;
}
.quiz-start-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 212, 170, 0.04) 0%, rgba(124, 58, 237, 0.04) 100%);
  pointer-events: none;
}
.quiz-start-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2), var(--accent3));
  border-radius: 20px 20px 0 0;
}

.start-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, rgba(0, 212, 170, 0.18), rgba(0, 212, 170, 0.06));
  border: 1.5px solid rgba(0, 212, 170, 0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: var(--accent);
}
.start-icon svg { width: 36px; height: 36px; }

.start-title {
  font-size: 1.7rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.start-desc {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ---- Selector Groups ---- */
.selector-group {
  margin-bottom: 24px;
  text-align: right;
}
.selector-label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
  color: var(--accent);
}

/* ---- Difficulty Buttons ---- */
.difficulty-btns {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.diff-btn {
  flex: 1;
  min-width: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  background: var(--bg3);
  color: var(--muted);
  font-family: var(--font);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.diff-btn .diff-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
  transition: background 0.2s;
}
.diff-easy.active,  .diff-easy:hover  { border-color: var(--ok);      color: var(--ok);      background: rgba(34,197,94,.1); }
.diff-easy.active .diff-dot           { background: var(--ok); }
.diff-medium.active, .diff-medium:hover { border-color: var(--accent3); color: var(--accent3); background: rgba(245,158,11,.1); }
.diff-medium.active .diff-dot         { background: var(--accent3); }
.diff-hard.active,  .diff-hard:hover  { border-color: var(--danger);  color: var(--danger);  background: rgba(239,68,68,.1); }
.diff-hard.active .diff-dot           { background: var(--danger); }
.diff-all.active,   .diff-all:hover   { border-color: var(--accent);  color: var(--accent);  background: rgba(0,212,170,.1); }
.diff-all.active .diff-dot            { background: var(--accent); }

/* ---- Category Buttons ---- */
.category-btns {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.cat-btn {
  padding: 8px 16px;
  border-radius: 100px;
  border: 1.5px solid var(--border);
  background: var(--bg3);
  color: var(--muted);
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.cat-btn:hover,
.cat-btn.active {
  border-color: var(--accent2);
  color: #c4b5fd;
  background: rgba(124, 58, 237, 0.12);
}

/* ---- Start Stats ---- */
.start-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin: 28px 0 32px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 0;
  flex-wrap: wrap;
}
.start-stat { text-align: center; padding: 0 24px; }
.sstat-num  { display: block; font-size: 1.4rem; font-weight: 800; color: var(--accent); line-height: 1; }
.sstat-label { display: block; font-size: 0.72rem; color: var(--muted); margin-top: 4px; }
.start-stat-div { width: 1px; height: 36px; background: var(--border); }

/* ---- Start Button ---- */
.btn-start {
  width: 100%;
  padding: 15px 32px;
  font-size: 1.05rem;
  border-radius: 12px;
}

/* =====================================================
   QUIZ SCREEN
   ===================================================== */

/* Progress Bar */
.quiz-progress-wrap {
  height: 5px;
  background: var(--bg3);
  border-radius: 100px;
  overflow: hidden;
  margin-bottom: 24px;
}
.quiz-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 100px;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Quiz Header */
.quiz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
}
.q-counter {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-weight: 700;
}
.q-current { font-size: 1.5rem; color: var(--accent); line-height: 1; }
.q-sep     { color: var(--muted); font-size: 1rem; }
.q-total   { font-size: 1rem; color: var(--muted); }
.q-label   { font-size: 0.75rem; color: var(--muted); margin-right: 4px; }

.q-score-live {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.25);
  color: var(--ok);
  padding: 5px 12px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 700;
}

/* Timer */
.timer-wrap {
  position: relative;
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.timer-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: none;
}
.timer-bg   { stroke: var(--bg3); }
.timer-fill {
  stroke: var(--accent);
  transition: stroke-dashoffset 1s linear, stroke 0.3s;
}
.timer-fill.danger { stroke: var(--danger) !important; }
.timer-num {
  position: relative;
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text);
  z-index: 1;
  line-height: 1;
}
.timer-num.danger { color: var(--danger); }

/* Question Card */
.question-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 32px;
  margin-bottom: 16px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  position: relative;
  overflow: hidden;
}
.question-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0; left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  border-radius: 16px 16px 0 0;
}

.q-category-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  background: rgba(124, 58, 237, 0.15);
  border: 1px solid rgba(124, 58, 237, 0.3);
  color: #c4b5fd;
  margin-bottom: 16px;
}

.q-text {
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  line-height: 1.7;
  margin: 0;
}

/* Answer Buttons */
.answers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}
@media (max-width: 560px) {
  .answers-grid { grid-template-columns: 1fr; }
}

.answer-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 14px 18px;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: right;
  cursor: pointer;
  transition: all 0.2s;
  line-height: 1.5;
}
.answer-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: rgba(0, 212, 170, 0.06);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.08);
  transform: translateY(-1px);
}
.answer-btn:disabled { cursor: not-allowed; opacity: 0.75; }

.ans-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border-radius: 8px;
  background: var(--bg3);
  border: 1px solid var(--border);
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--muted);
  transition: all 0.2s;
}
.ans-text { flex: 1; }

/* Correct / Wrong States */
.answer-btn.correct {
  border-color: var(--ok) !important;
  background: rgba(34, 197, 94, 0.12) !important;
  color: #4ade80 !important;
}
.answer-btn.correct .ans-letter {
  background: var(--ok);
  border-color: var(--ok);
  color: #0a0f1e;
}
.answer-btn.wrong {
  border-color: var(--danger) !important;
  background: rgba(239, 68, 68, 0.12) !important;
  color: #f87171 !important;
}
.answer-btn.wrong .ans-letter {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}
.answer-btn.reveal-correct {
  border-color: rgba(34, 197, 94, 0.4) !important;
  color: #4ade80 !important;
}
.answer-btn.reveal-correct .ans-letter {
  background: rgba(34, 197, 94, 0.2);
  border-color: rgba(34, 197, 94, 0.4);
  color: var(--ok);
}

/* Explanation Box */
.explanation-box {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  border-radius: 12px;
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.25);
  animation: fadeIn 0.3s ease;
}
.explanation-box.correct-exp {
  background: rgba(34, 197, 94, 0.08);
  border-color: rgba(34, 197, 94, 0.25);
}
.explanation-box.wrong-exp {
  background: rgba(239, 68, 68, 0.08);
  border-color: rgba(239, 68, 68, 0.25);
}
.exp-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 1px;
}
.exp-text {
  font-size: 0.87rem;
  color: var(--text);
  line-height: 1.65;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =====================================================
   RESULTS SCREEN
   ===================================================== */
.results-header {
  display: flex;
  align-items: center;
  gap: 32px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px 40px;
  margin-bottom: 20px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
}
@media (max-width: 560px) {
  .results-header { flex-direction: column; text-align: center; padding: 28px 24px; gap: 20px; }
}

/* Score Circle */
.score-circle-wrap {
  position: relative;
  width: 160px;
  height: 160px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.score-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.score-track { stroke: var(--bg3); }
.score-arc {
  stroke: var(--accent);
  transition: stroke-dashoffset 1.5s cubic-bezier(0.4, 0, 0.2, 1), stroke 0.5s;
}
.score-circle-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  line-height: 1;
}
.score-circle-num {
  display: block;
  font-size: 2.6rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
}
.score-circle-pct {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}
.score-circle-label {
  display: block;
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 4px;
}

/* Results Info */
.results-info { flex: 1; }
.rating-badge {
  display: inline-block;
  padding: 5px 16px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.rating-excellent { background: rgba(34,197,94,.15);  border: 1px solid rgba(34,197,94,.4);  color: #4ade80; }
.rating-verygood  { background: rgba(0,212,170,.15);  border: 1px solid rgba(0,212,170,.4);  color: var(--accent); }
.rating-good      { background: rgba(245,158,11,.15); border: 1px solid rgba(245,158,11,.4); color: #fcd34d; }
.rating-pass      { background: rgba(249,115,22,.15); border: 1px solid rgba(249,115,22,.4); color: #fb923c; }
.rating-fail      { background: rgba(239,68,68,.15);  border: 1px solid rgba(239,68,68,.4);  color: #f87171; }

.results-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}
.results-subtitle {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
}

/* Breakdown Table */
.breakdown-table {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 20px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}
.breakdown-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}
.breakdown-row:last-child { border-bottom: none; }
.breakdown-row:hover { background: rgba(255, 255, 255, 0.02); }

.bd-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.correct-row .bd-icon { background: rgba(34,197,94,.12);  color: var(--ok); }
.wrong-row   .bd-icon { background: rgba(239,68,68,.12);  color: var(--danger); }
.skipped-row .bd-icon { background: rgba(245,158,11,.12); color: var(--accent3); }
.total-row   .bd-icon { background: rgba(0,212,170,.12);  color: var(--accent); }

.bd-label { flex: 1; font-size: 0.9rem; color: var(--text); }
.bd-val   { font-size: 1.2rem; font-weight: 800; color: #fff; min-width: 32px; text-align: center; }
.correct-row .bd-val { color: var(--ok); }
.wrong-row   .bd-val { color: var(--danger); }
.skipped-row .bd-val { color: var(--accent3); }
.total-row   .bd-val { color: var(--accent); font-size: 1rem; }

/* Results Actions */
.results-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.results-actions .btn-primary { flex: 1; min-width: 160px; justify-content: center; }
.btn-review {
  flex: 1;
  min-width: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  font-size: 0.92rem;
  font-weight: 700;
}

/* Review Section */
.review-section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}
.review-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.review-title svg { color: var(--accent); }

.review-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Review Item */
.review-item {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.review-item.item-correct { border-color: rgba(34, 197, 94, 0.3); }
.review-item.item-wrong   { border-color: rgba(239, 68, 68, 0.3); }
.review-item.item-skipped { border-color: rgba(245, 158, 11, 0.3); }

.review-item-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
}
.review-num {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 800;
  flex-shrink: 0;
}
.item-correct .review-num { background: rgba(34,197,94,.2);  color: var(--ok); }
.item-wrong   .review-num { background: rgba(239,68,68,.2);  color: var(--danger); }
.item-skipped .review-num { background: rgba(245,158,11,.2); color: var(--accent3); }

.review-q-text {
  flex: 1;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.6;
}
.review-status-icon { flex-shrink: 0; margin-top: 2px; }
.review-status-icon.ic-correct { color: var(--ok); }
.review-status-icon.ic-wrong   { color: var(--danger); }
.review-status-icon.ic-skipped { color: var(--accent3); }

.review-options {
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.review-opt {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
}
.review-opt.opt-correct {
  background: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.3);
  color: #4ade80;
}
.review-opt.opt-selected-wrong {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: #f87171;
}
.review-opt-letter {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  background: var(--bg3);
  border: 1px solid var(--border);
  flex-shrink: 0;
}
.review-opt.opt-correct .review-opt-letter {
  background: var(--ok); border-color: var(--ok); color: #0a0f1e;
}
.review-opt.opt-selected-wrong .review-opt-letter {
  background: var(--danger); border-color: var(--danger); color: #fff;
}

.review-explanation {
  margin: 0 18px 14px;
  padding: 10px 14px;
  background: rgba(124, 58, 237, 0.08);
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-radius: 8px;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.65;
}
.review-explanation strong {
  color: #c4b5fd;
  font-weight: 700;
  display: block;
  margin-bottom: 4px;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 640px) {
  .quiz-start-card { padding: 32px 20px; }
  .start-stats { gap: 0; }
  .start-stat { padding: 0 12px; }
  .sstat-num { font-size: 1.1rem; }
  .question-card { padding: 20px 18px; }
  .results-header { padding: 24px 18px; }
  .review-section { padding: 20px 16px; }
  .breakdown-row { padding: 14px 16px; }
  .difficulty-btns { gap: 8px; }
  .diff-btn { font-size: 0.82rem; padding: 9px 12px; }
}