/* ══════════════════════════════════════════════════
   IT Study Hub — quiz-page.css
   Used by: quiz.html only.
   Requires: global.css loaded first.
══════════════════════════════════════════════════ */

/* ── TOKEN OVERRIDES ── */
:root {
  --bg:           #0a0a0f;
  --card:         #111118;
  --border:       #1e1e2e;
  --accent:       #c8f135;
  --accent2:      #a8e020;
  --text:         #e8e8f0;
  --muted:        #6b6b80;
  --beginner:     #43e97b;
  --intermediate: #f7b731;
  --advanced:     #ff6584;
}

body {
  font-family: 'Syne', sans-serif;
  cursor: default;
}

/* Animated grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(200,241,53,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,241,53,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* ── SITE NAV ── */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px; height: 60px;
  background: rgba(10,10,15,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid #1e1e2e;
}

.site-nav-logo {
  font-family: 'Syne', sans-serif; font-size: 14px; font-weight: 800;
  letter-spacing: 0.12em; color: #e8e8f0; text-decoration: none;
}
.site-nav-logo span { color: #c8f135; }

.site-nav-right { display: flex; align-items: center; gap: 12px; }

.nav-back-btn {
  display: flex; align-items: center; gap: 7px;
  font-family: 'Space Mono', monospace; font-size: 11px;
  color: #6b6b80; text-decoration: none;
  border: 1px solid #1e1e2e; border-radius: 6px;
  padding: 6px 14px; transition: all 0.2s;
  text-transform: uppercase; letter-spacing: 0.05em;
}
.nav-back-btn:hover { color: #c8f135; border-color: rgba(200,241,53,0.4); background: rgba(200,241,53,0.06); }

.nav-courses-btn {
  display: flex; align-items: center; gap: 7px;
  font-family: 'Space Mono', monospace; font-size: 11px;
  color: #000; background: #c8f135;
  text-decoration: none; border-radius: 6px;
  padding: 6px 14px; transition: all 0.2s;
  text-transform: uppercase; letter-spacing: 0.05em; font-weight: 700;
}
.nav-courses-btn:hover { background: #b8e020; transform: translateY(-1px); }

/* ── CONTAINER ── */
.quiz-container {
  position: relative; z-index: 1;
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

/* ── HEADER ── */
.quiz-header {
  text-align: center;
  margin-bottom: 50px;
  animation: fadeDown 0.6s ease both;
}

.quiz-header .badge {
  display: inline-block;
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 5px 14px;
  border-radius: 2px;
  margin-bottom: 18px;
}

.quiz-header h1 {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 12px;
}
.quiz-header h1 span { color: var(--accent); }

.quiz-header p {
  color: var(--muted);
  font-size: 15px;
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ── SUBJECT SELECTOR ── */
#subjectScreen { animation: fadeUp 0.5s ease both; }

.subject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 10px;
}

.subject-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}
.subject-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.25s ease;
  transform-origin: left;
}
.subject-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(200,241,53,0.15);
}
.subject-card:hover::before { transform: scaleX(1); }
.subject-card .icon { font-size: 28px; margin-bottom: 14px; display: block; }
.subject-card h3    { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.subject-card p     { font-size: 12px; color: var(--muted); font-family: 'Space Mono', monospace; }

/* ── QUIZ SCREEN ── */
#quizScreen { display: none; animation: fadeUp 0.4s ease both; }

.quiz-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  flex-wrap: wrap;
  gap: 10px;
}
.quiz-subject-label {
  font-family: 'Space Mono', monospace;
  font-size: 11px; letter-spacing: 2px;
  text-transform: uppercase; color: var(--accent);
}
.quiz-progress-text {
  font-family: 'Space Mono', monospace;
  font-size: 12px; color: var(--muted);
}

.progress-bar-wrap {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin-bottom: 36px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #c8f135, #a8e020);
  border-radius: 2px;
  transition: width 0.4s ease;
}

.level-tag {
  display: inline-block;
  font-family: 'Space Mono', monospace;
  font-size: 10px; letter-spacing: 2px;
  text-transform: uppercase;
  padding: 3px 10px; border-radius: 2px; margin-bottom: 16px;
}
.level-tag.beginner     { background: rgba(67,233,123,0.1);  color: var(--beginner);     border: 1px solid rgba(67,233,123,0.3); }
.level-tag.intermediate { background: rgba(247,183,49,0.1);  color: var(--intermediate); border: 1px solid rgba(247,183,49,0.3); }
.level-tag.advanced     { background: rgba(255,101,132,0.1); color: var(--advanced);     border: 1px solid rgba(255,101,132,0.3); }

.question-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px 28px;
  margin-bottom: 20px;
}
.question-num  { font-family: 'Space Mono', monospace; font-size: 11px; color: var(--muted); margin-bottom: 14px; }
.question-text { font-size: 17px; font-weight: 600; line-height: 1.5; margin-bottom: 4px; }

.code-block {
  background: #0d0d14;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 18px;
  margin: 16px 0;
  font-family: 'Space Mono', monospace;
  font-size: 13px; color: #a8b2d8;
  line-height: 1.6; white-space: pre; overflow-x: auto;
}

.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 24px;
}

.option-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  color: var(--text);
  font-family: 'Syne', sans-serif;
  font-size: 14px; font-weight: 500;
  cursor: pointer; text-align: left;
  transition: all 0.2s ease;
  display: flex; align-items: center; gap: 10px;
}
.option-btn .opt-letter {
  font-family: 'Space Mono', monospace;
  font-size: 11px; color: var(--muted); min-width: 18px;
}
.option-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: rgba(200,241,53,0.08);
  transform: translateX(3px);
}
.option-btn.correct        { border-color: var(--beginner); background: rgba(67,233,123,0.1);  color: var(--beginner); }
.option-btn.wrong          { border-color: var(--advanced); background: rgba(255,101,132,0.1); color: var(--advanced); }
.option-btn.reveal-correct { border-color: var(--beginner); background: rgba(67,233,123,0.06); }
.option-btn:disabled       { cursor: default; }

.feedback-bar {
  padding: 12px 18px;
  border-radius: 8px;
  font-size: 14px; font-weight: 600;
  margin-bottom: 16px;
  display: none;
}
.feedback-bar.correct { background: rgba(67,233,123,0.1);  color: var(--beginner); border: 1px solid rgba(67,233,123,0.2); }
.feedback-bar.wrong   { background: rgba(255,101,132,0.1); color: var(--advanced); border: 1px solid rgba(255,101,132,0.2); }

.next-btn {
  display: none;
  width: 100%;
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 10px;
  padding: 16px;
  font-family: 'Syne', sans-serif;
  font-size: 15px; font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.5px;
}
.next-btn:hover { background: #b8e020; transform: translateY(-1px); }

/* ── RESULT SCREEN ── */
#resultScreen {
  display: none;
  text-align: center;
  animation: fadeUp 0.5s ease both;
}

.result-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px 36px;
  margin-bottom: 24px;
  position: relative; overflow: hidden;
}
.result-card::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(200,241,53,0.08), transparent 60%);
  pointer-events: none;
}

.result-level-badge { font-size: 56px; margin-bottom: 16px; }
.result-level-name  { font-size: 32px; font-weight: 800; letter-spacing: -1px; margin-bottom: 8px; }
.result-level-name.beginner     { color: var(--beginner); }
.result-level-name.intermediate { color: var(--intermediate); }
.result-level-name.advanced     { color: var(--advanced); }

.result-subject {
  font-family: 'Space Mono', monospace;
  font-size: 12px; color: var(--muted);
  letter-spacing: 2px; text-transform: uppercase;
  margin-bottom: 24px;
}

.score-display {
  font-family: 'Space Mono', monospace;
  font-size: 48px; font-weight: 700; margin-bottom: 6px;
}
.score-label { font-size: 13px; color: var(--muted); margin-bottom: 28px; }

.result-description {
  font-size: 15px; line-height: 1.7; color: var(--muted);
  max-width: 460px; margin: 0 auto 32px;
}

.score-breakdown {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 32px;
}
.breakdown-item { background: #0d0d14; border-radius: 10px; padding: 16px 10px; }
.breakdown-item .bd-label {
  font-size: 11px; color: var(--muted);
  font-family: 'Space Mono', monospace;
  text-transform: uppercase; letter-spacing: 1px; margin-bottom: 6px;
}
.breakdown-item .bd-val { font-size: 22px; font-weight: 800; }
.breakdown-item.b .bd-val { color: var(--beginner); }
.breakdown-item.i .bd-val { color: var(--intermediate); }
.breakdown-item.a .bd-val { color: var(--advanced); }

.action-row {
  display: flex; gap: 12px;
  justify-content: center; flex-wrap: wrap;
}

.btn-primary {
  background: var(--accent); color: #000;
  border: none; border-radius: 10px;
  padding: 14px 28px;
  font-family: 'Syne', sans-serif; font-size: 15px; font-weight: 700;
  cursor: pointer; transition: all 0.2s;
}
.btn-primary:hover { background: #b8e020; transform: translateY(-1px); }

.btn-secondary {
  background: transparent; color: var(--text);
  border: 1px solid var(--border); border-radius: 10px;
  padding: 14px 28px;
  font-family: 'Syne', sans-serif; font-size: 15px; font-weight: 600;
  cursor: pointer; transition: all 0.2s;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ── SECTION TITLE ── */
.section-title {
  font-size: 13px;
  font-family: 'Space Mono', monospace;
  color: var(--muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 20px;
}

/* ── ANIMATIONS ── */
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.screen-transition { animation: fadeUp 0.4s ease both; }

/* ── RESPONSIVE ── */
@media (max-width: 500px) {
  .options-grid { grid-template-columns: 1fr; }
}