/* aiGodess Zoology Practice CSS v1 — based on Physics v4 */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@500;700&family=Sora:wght@400;500;600;700;800;900&family=Orbitron:wght@700;900&display=swap');

:root {
  --bg:        #0a0c10;
  --bg-card:   #12161e;
  --bg-card2:  #181d27;
  --bg-card3:  #1e2535;
  --border:    #252d3d;
  --border2:   #2d3748;
  --accent:    #a855f7;
  --acc2:      #9333ea;
  --correct:   #22c55e;
  --wrong:     #ef4444;
  --review:    #a855f7;
  --revealed:  #4b5563;
  --text:      #cbd5e1;
  --text-dim:  #64748b;
  --text-bright:#f1f5f9;
  --header-h:  96px;
  --omr-w:     340px;
  --font:      'Sora', system-ui, sans-serif;
  --mono:      'JetBrains Mono', monospace;
  --orb:       'Orbitron', sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;background:var(--bg);color:var(--text);font-family:var(--font);font-size:15px;line-height:1.6;overflow:hidden}
a{color:var(--accent);text-decoration:none}
button{cursor:pointer;font-family:var(--font)}
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:2px}

/* ═══════════════════════════════════
   HEADER — 2 ROWS
═══════════════════════════════════ */
.main-header{
  position:fixed;top:0;left:0;right:0;
  height:var(--header-h);
  background:var(--bg-card);
  border-bottom:1px solid var(--border);
  z-index:200;
  display:flex;flex-direction:column;
}

/* ROW 1 */
.header-row1{
  display:flex;align-items:center;
  height:50px;
  padding:0 16px;
  gap:16px;
  border-bottom:1px solid var(--border);
  background:linear-gradient(135deg,#12161e,#0f1520);
  overflow:hidden;
}

.brand-logo{
  display:flex;align-items:center;gap:10px;
  flex-shrink:0;text-decoration:none;
}
.brand-logo img{
  width:42px;height:42px;
  border-radius:50%;
  border:2px solid var(--accent);
  object-fit:cover;
  box-shadow:0 0 12px rgba(168,85,247,.4);
}
.brand-name{
  font-size:20px;font-weight:900;
  color:var(--accent);
  letter-spacing:-0.5px;
  font-family:var(--font);
  white-space:nowrap;
}

/* ANIMATED BANNER */
.mlp-banner{
  flex:1;overflow:hidden;
  height:34px;
  background:linear-gradient(135deg,rgba(168,85,247,.08),rgba(139,92,246,.08),rgba(34,197,94,.08));
  border:1px solid rgba(168,85,247,.2);
  border-radius:8px;
  display:flex;align-items:center;
  position:relative;
}
.mlp-banner::before{
  content:'';position:absolute;left:0;top:0;bottom:0;width:40px;
  background:linear-gradient(90deg,var(--bg-card),transparent);
  z-index:1;
}
.mlp-banner::after{
  content:'';position:absolute;right:0;top:0;bottom:0;width:40px;
  background:linear-gradient(270deg,var(--bg-card),transparent);
  z-index:1;
}
.banner-track{
  display:flex;align-items:center;
  white-space:nowrap;
  animation:scroll-banner 30s linear infinite;
  padding:0 20px;
}
@keyframes scroll-banner{
  0%{transform:translateX(0)}
  100%{transform:translateX(-50%)}
}
.banner-text{
  font-size:13px;font-weight:600;
  color:var(--text);
  letter-spacing:.02em;
}
.banner-highlight{
  color:#a855f7;font-weight:800;
  font-family:var(--orb);
  font-size:11px;letter-spacing:.08em;
  text-shadow:0 0 10px rgba(168,85,247,.5);
}
.banner-accent{
  color:#22d3ee;font-weight:700;
}
.banner-gold{
  color:#fbbf24;font-weight:700;
  text-shadow:0 0 8px rgba(251,191,36,.3);
}

/* ROW 2 */
.header-row2{
  display:flex;align-items:center;
  height:46px;
  padding:0 16px;
  gap:12px;
}

.session-controls{display:flex;align-items:center;gap:10px;flex:1}
.nav-select-group{display:flex;flex-direction:column;gap:1px}
.nav-select-group label{font-size:9px;font-weight:700;color:var(--text-dim);text-transform:uppercase;letter-spacing:.06em}
.nav-select{
  background:var(--bg-card2);border:1px solid var(--border2);
  color:var(--text-bright);padding:4px 8px;
  border-radius:6px;font-size:13px;font-family:var(--font);
}
.nav-select:focus{outline:none;border-color:var(--accent)}
.microtopic-select{min-width:240px;max-width:420px}
.start-btn{
  padding:6px 18px;
  background:linear-gradient(135deg,var(--accent),var(--acc2));
  color:#fff;border:none;border-radius:7px;
  font-size:13px;font-weight:800;
  white-space:nowrap;flex-shrink:0;
  box-shadow:0 2px 10px rgba(168,85,247,.3);
  transition:all .2s;
}
.start-btn:hover{transform:translateY(-1px);box-shadow:0 4px 14px rgba(168,85,247,.4)}
.start-btn:disabled{background:#374151;color:#6b7280;cursor:not-allowed;transform:none;box-shadow:none}

.session-status{
  display:flex;align-items:center;gap:10px;flex:1;
}
.status-pill{display:flex;align-items:center;gap:5px;font-size:13px;white-space:nowrap}
.pill-label{color:var(--text-dim);font-size:12px}
.pill-val{font-weight:700;color:var(--text-bright);font-family:var(--mono);font-size:14px}
.score-val{color:var(--accent)}
.progress-track{flex:1;height:6px;background:var(--border2);border-radius:3px;overflow:hidden;min-width:60px}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--acc2));border-radius:3px;transition:width .4s ease}

.timer-box{
  display:flex;align-items:center;gap:6px;
  background:var(--bg-card2);border:1px solid var(--border2);
  border-radius:8px;padding:4px 10px;
  font-family:var(--mono);font-size:14px;font-weight:700;
  color:var(--text-bright);white-space:nowrap;
}
.timer-box.warning{color:var(--accent);border-color:rgba(168,85,247,.4)}
.timer-box.danger{color:var(--wrong);border-color:rgba(239,68,68,.4);animation:pulse 1s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
.timer-icon{font-size:13px}

.btn-ghost{padding:4px 10px;border-radius:6px;font-size:12px;font-weight:600;border:1px solid var(--border2);background:transparent;color:var(--text-dim);transition:all .2s;white-space:nowrap}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-danger{padding:4px 12px;border-radius:6px;font-size:12px;font-weight:700;border:none;background:#dc2626;color:#fff;transition:all .2s;white-space:nowrap}
.btn-danger:hover{background:#b91c1c}

/* ═══════════════════════════════════
   WELCOME SCREEN
═══════════════════════════════════ */
.welcome-wrap{
  padding-top:var(--header-h);
  min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  padding:calc(var(--header-h) + 30px) 20px 30px;
}
.welcome-card{
  position:relative;overflow:hidden;
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:20px;padding:36px 32px;
  max-width:580px;width:100%;
  box-shadow:0 20px 60px rgba(0,0,0,.4);
}
.welcome-glow{position:absolute;top:-60px;right:-60px;width:200px;height:200px;background:radial-gradient(circle,rgba(168,85,247,.12),transparent 70%);pointer-events:none}
.welcome-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--acc2),#a855f7,transparent)}
.welcome-header{display:flex;align-items:center;gap:16px;margin-bottom:20px}
.welcome-icon{font-size:40px;line-height:1}
.welcome-title{font-size:24px;font-weight:800;color:var(--text-bright);letter-spacing:-0.5px}
.welcome-sub{font-size:13px;color:var(--text-dim);margin-top:4px}
.welcome-legend{display:flex;flex-wrap:wrap;gap:8px 16px;margin-bottom:16px;padding:14px;background:var(--bg-card2);border-radius:10px;border:1px solid var(--border)}
.leg-item{display:flex;align-items:center;gap:5px;font-size:13px;font-weight:500;color:var(--text)}
.leg-dot{width:11px;height:11px;border-radius:3px;flex-shrink:0}
.welcome-how{padding:14px;background:var(--bg-card2);border-radius:10px;border:1px solid var(--border);margin-bottom:16px}
.how-title{font-size:11px;font-weight:800;color:var(--text-dim);letter-spacing:.08em;text-transform:uppercase;margin-bottom:10px}
.how-steps{display:flex;flex-direction:column;gap:7px}
.how-step{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text)}
.how-num{width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--acc2));color:#fff;font-size:11px;font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.welcome-footer{display:flex;align-items:center;gap:10px;padding-top:14px;border-top:1px solid var(--border)}
.subj-link{padding:5px 12px;border-radius:7px;font-size:13px;font-weight:600;border:1px solid var(--border2);color:var(--text-dim);transition:all .2s}
.phys-link:hover{border-color:#a855f7;color:#a855f7}
.chem-link:hover{border-color:#22d3ee;color:#22d3ee}
.bot-link:hover{border-color:#22c55e;color:#22c55e}
.zoo-link:hover{border-color:#a855f7;color:#a855f7}

/* ═══════════════════════════════════
   EXAM LAYOUT
═══════════════════════════════════ */
.exam-layout{
  display:grid !important;
  grid-template-columns:1fr var(--omr-w);
  padding-top:var(--header-h);
  height:100vh;overflow:hidden;
}

/* ═══════════════════════════════════
   QUESTION PANEL
═══════════════════════════════════ */
.question-panel{
  padding:16px 22px;
  overflow-y:auto;
  height:calc(100vh - var(--header-h));
  display:flex;flex-direction:column;gap:12px;
}

.q-header{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.subject-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 20px;border-radius:100px;
  font-size:15px;font-weight:900;
  letter-spacing:.1em;text-transform:uppercase;
  background:rgba(168,85,247,.14);
  border:2px solid rgba(168,85,247,.35);
  color:var(--accent);
  box-shadow:0 0 20px rgba(168,85,247,.1);
}
.q-num{font-size:14px;color:var(--text-dim);font-weight:600}
.q-score{margin-left:auto;font-size:14px;color:var(--text-dim)}
.q-score strong{color:var(--accent);font-family:var(--mono);font-size:16px}

.question-text{
  font-size:17px;color:var(--text-bright);
  line-height:1.75;padding:16px 20px;
  background:var(--bg-card2);border-radius:12px;
  border:1px solid var(--border);
  border-left:3px solid var(--accent);
  flex-shrink:0;
}

/* OPTIONS */
.options-list{display:flex;flex-direction:column;gap:8px;flex-shrink:0}
.option-btn{
  display:flex;align-items:center;gap:12px;
  padding:12px 16px;
  background:var(--bg-card2);border:1px solid var(--border);
  border-radius:10px;color:var(--text);font-size:15px;
  text-align:left;transition:all .18s;width:100%;
}
.option-btn:hover:not(:disabled){border-color:var(--accent);background:rgba(168,85,247,.06);transform:translateX(3px)}
.option-btn.selected{border-color:var(--accent);background:rgba(168,85,247,.1);color:var(--text-bright)}
.option-btn.correct{border-color:var(--correct);background:rgba(34,197,94,.1);color:#4ade80}
.option-btn.wrong{border-color:var(--wrong);background:rgba(239,68,68,.1);color:#f87171}
.option-btn:disabled{cursor:default}
.option-label{
  width:30px;height:30px;border-radius:50%;
  background:var(--border2);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:800;flex-shrink:0;
  transition:all .18s;font-family:var(--mono);
}
.option-btn.selected .option-label{background:var(--accent);color:#fff}
.option-btn.correct .option-label{background:var(--correct);color:#fff}
.option-btn.wrong .option-label{background:var(--wrong);color:#fff}
.option-text{font-weight:500}

/* FEEDBACK BOX */
.feedback-box{
  display:flex;align-items:center;gap:12px;
  padding:14px 18px;border-radius:12px;
  font-size:15px;font-weight:600;
  flex-shrink:0;
  animation:fadeIn .3s ease;
}
@keyframes fadeIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
.feedback-box.correct-fb{
  background:rgba(34,197,94,.12);
  border:1px solid rgba(34,197,94,.4);
  color:#4ade80;
}
.feedback-box.wrong-fb{
  background:rgba(239,68,68,.12);
  border:1px solid rgba(239,68,68,.4);
  color:#f87171;
}
.feedback-icon{font-size:22px}
.feedback-msg{line-height:1.4}

/* ACTION BUTTONS */
.action-bar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;flex-shrink:0}
.action-btn{
  padding:9px 16px;border-radius:8px;
  font-size:13px;font-weight:700;border:none;
  transition:all .18s;display:flex;align-items:center;gap:5px;
}
.save-btn{background:var(--accent);color:#fff;box-shadow:0 2px 8px rgba(168,85,247,.3)}
.save-btn:hover{background:var(--acc2);transform:translateY(-1px)}
.next-btn{background:var(--correct);color:#fff;box-shadow:0 2px 8px rgba(34,197,94,.3);animation:pulse-green .6s ease}
@keyframes pulse-green{0%{box-shadow:0 0 0 0 rgba(34,197,94,.5)}70%{box-shadow:0 0 0 8px rgba(34,197,94,0)}100%{box-shadow:0 2px 8px rgba(34,197,94,.3)}}
.tryagain-btn{background:#7c3aed;color:#fff}
.tryagain-btn:hover{background:#6d28d9}
.mark-next-btn{background:var(--review);color:#fff}
.mark-next-btn:hover{background:#9333ea}
.clear-btn{background:var(--bg-card2);border:1px solid var(--border2);color:var(--text)}
.clear-btn:hover{border-color:var(--wrong);color:var(--wrong)}
.show-answer-btn{background:rgba(168,85,247,.12);border:1px solid rgba(168,85,247,.3);color:var(--accent)}
.show-answer-btn:hover{background:rgba(168,85,247,.2)}
.save-next-btn{background:var(--correct);color:#fff}
.save-next-btn:hover{background:#16a34a}
.submit-btn{
  margin-left:auto;padding:9px 20px;
  background:linear-gradient(135deg,var(--accent),var(--acc2));
  color:#fff;border:none;border-radius:8px;
  font-size:13px;font-weight:800;
  box-shadow:0 2px 10px rgba(168,85,247,.3);
  transition:all .18s;
}
.submit-btn:hover{transform:translateY(-1px);box-shadow:0 4px 14px rgba(168,85,247,.4)}

/* EXPLANATION */
.explanation-box{
  padding:14px 18px;background:var(--bg-card2);
  border:1px solid var(--border);border-radius:12px;
  border-left:3px solid var(--accent);flex-shrink:0;
}
.explanation-label{font-size:11px;font-weight:800;letter-spacing:.1em;color:var(--accent);text-transform:uppercase;margin-bottom:6px;display:flex;align-items:center;gap:5px}
.explanation-text{font-size:14px;color:var(--text);line-height:1.75}

/* ═══════════════════════════════════
   OMR PANEL
═══════════════════════════════════ */
.omr-panel{
  background:var(--bg-card);border-left:1px solid var(--border);
  padding:14px 12px;overflow-y:auto;
  height:calc(100vh - var(--header-h));
  display:flex;flex-direction:column;gap:10px;
}
.omr-header{display:flex;align-items:center;justify-content:space-between}
.omr-title{font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--text-dim)}
.omr-topic{font-size:10px;color:var(--accent);line-height:1.4;padding-bottom:8px;border-bottom:1px solid var(--border);font-weight:600}
.omr-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:4px}
.omr-stat{text-align:center;padding:7px 3px;background:var(--bg);border-radius:8px;border:1px solid var(--border)}
.omr-num{font-size:20px;font-weight:800;line-height:1;font-family:var(--mono)}
.omr-lbl{font-size:10px;color:var(--text-dim);margin-top:2px;font-weight:600}
.stat-correct .omr-num{color:var(--correct)}
.stat-wrong .omr-num{color:var(--wrong)}
.stat-skipped .omr-num{color:var(--text-dim)}
.stat-review .omr-num{color:var(--review)}
.omr-grid{display:grid !important;grid-template-columns:repeat(10,1fr) !important;gap:3px;width:100%;flex-shrink:0}
.omr-bubble{
  width:100%;aspect-ratio:1;min-width:0;min-height:44px;
  border-radius:4px;font-size:9px;font-weight:700;
  background:var(--bg);color:var(--text-dim);
  border:1px solid var(--border);
  transition:all .12s;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);line-height:1;
}
.omr-bubble:hover{border-color:var(--accent);color:var(--accent);transform:scale(1.15);z-index:1}
.omr-bubble.current{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 0 6px rgba(168,85,247,.5)}
.omr-bubble.answered{background:var(--correct);color:#fff;border-color:var(--correct)}
.omr-bubble.wrong{background:var(--wrong);color:#fff;border-color:var(--wrong)}
.omr-bubble.review{background:var(--review);color:#fff;border-color:var(--review)}
.omr-bubble.revealed{background:var(--revealed);color:#9ca3af;border-color:var(--revealed)}
.omr-legend{display:flex;flex-wrap:wrap;gap:4px 8px}
.ol{display:flex;align-items:center;gap:3px;font-size:9px;color:var(--text-dim);font-weight:600}
.old{width:8px;height:8px;border-radius:2px;flex-shrink:0}
.old.current{background:var(--accent)}
.old.correct{background:var(--correct)}
.old.wrong{background:var(--wrong)}
.old.review{background:var(--review)}
.old.revealed{background:var(--revealed)}
.omr-nav{display:flex;gap:6px;margin-top:auto}
.omr-btn{flex:1;padding:6px;background:var(--bg-card2);border:1px solid var(--border2);border-radius:6px;font-size:12px;font-weight:700;color:var(--text-dim);transition:all .2s;cursor:pointer}
.omr-btn:hover{border-color:var(--accent);color:var(--accent)}
.omr-btn-accent{background:var(--accent);border-color:var(--accent);color:#fff}
.omr-btn-accent:hover{background:var(--acc2);border-color:var(--acc2)}

/* RESULT */
.result-wrap{
  padding-top:var(--header-h);
  height:100vh;overflow-y:auto;
  background:var(--bg);
}

/* TOAST */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(100px);background:var(--bg-card);border:1px solid var(--border2);border-radius:10px;padding:10px 22px;font-size:13px;font-weight:600;color:var(--text-bright);z-index:9999;transition:transform .3s ease;white-space:nowrap;box-shadow:0 8px 24px rgba(0,0,0,.5)}
.toast.show{transform:translateX(-50%) translateY(0)}

/* MOBILE */
@media(max-width:768px){
  html,body{overflow:auto}
  .exam-layout{grid-template-columns:1fr;height:auto}
  .question-panel{height:auto;overflow:visible;padding-bottom:60px}
  .omr-panel{position:fixed;bottom:0;left:0;right:0;height:auto;max-height:45vh;border-left:none;border-top:1px solid var(--border);z-index:90;display:none}
  .banner-track{animation-duration:15s}
  .microtopic-select{min-width:160px}
}

.brand-titles{display:flex;flex-direction:column;gap:1px}
.brand-mlp{
  font-size:11px;font-weight:700;
  color:#22d3ee;
  letter-spacing:.06em;
  text-transform:uppercase;
  white-space:nowrap;
  text-shadow:0 0 10px rgba(34,211,238,.4);
}

/* Force OMR bubbles visible */
.omr-panel .omr-grid{
  display:grid !important;
  grid-template-columns:repeat(10,1fr) !important;
  gap:5px !important;
  width:100% !important;
}
.omr-panel .omr-bubble{
  display:flex !important;
  align-items:center !important;
  justify-content:center !important;
  min-height:26px !important;
  font-size:11px !important;
  font-weight:700 !important;
  border-radius:5px !important;
  border:1px solid var(--border) !important;
  background:var(--bg) !important;
  color:var(--text-dim) !important;
  cursor:pointer !important;
  font-family:var(--mono) !important;
  aspect-ratio:1 !important;
  width:100% !important;
}

/* OMR BUBBLE COLOR STATES - LOCKED */
.omr-panel .omr-bubble.current   { background:#a855f7 !important; color:#fff !important; border-color:#a855f7 !important; box-shadow:0 0 6px rgba(168,85,247,.5) !important; }
.omr-panel .omr-bubble.answered  { background:#22c55e !important; color:#fff !important; border-color:#22c55e !important; }
.omr-panel .omr-bubble.wrong     { background:#ef4444 !important; color:#fff !important; border-color:#ef4444 !important; }
.omr-panel .omr-bubble.review    { background:#a855f7 !important; color:#fff !important; border-color:#a855f7 !important; }
.omr-panel .omr-bubble.revealed  { background:#4b5563 !important; color:#9ca3af !important; border-color:#4b5563 !important; }

/* Mark for Review button — smaller font to fit text */
#markReviewNext { font-size:11px !important; }

.bub-num {
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  line-height: 1;
  pointer-events: none;
}

/* ═══════════════════════════════════
   HELP PANEL — Supplementary, low emphasis
═══════════════════════════════════ */
.help-panel{
  margin-top:8px;
  border:1px solid #1e2535;
  border-radius:10px;
  overflow:hidden;
  opacity:0.75;
  transition:opacity .2s;
  flex-shrink:0;
}
.help-panel:hover{opacity:1}

.help-header{
  display:flex;align-items:center;gap:7px;
  padding:7px 14px;
  background:#12161e;
  border-bottom:1px solid #1e2535;
  font-size:10px;font-weight:700;
  color:#4b5563;letter-spacing:.06em;text-transform:uppercase;
  cursor:pointer;
}
.help-icon{font-size:12px;color:#374151}

.help-body{
  padding:14px;
  display:grid;grid-template-columns:1fr 1fr;
  gap:14px 20px;
  background:#0d1117;
}

.help-section{display:flex;flex-direction:column;gap:7px}
.help-section-title{
  font-size:9px;font-weight:800;
  color:#374151;letter-spacing:.08em;text-transform:uppercase;
  padding-bottom:4px;border-bottom:1px solid #1a2030;
}

.help-row{display:flex;align-items:flex-start;gap:8px;margin-bottom:3px}
.help-text{font-size:10px;color:#4b5563;line-height:1.5;font-weight:400}
.help-text em{color:#6b7280;font-style:normal;font-weight:600}
.help-text strong{color:#6b7280;font-weight:700}
.help-note{font-size:10px;color:#374151;font-style:italic;margin-top:2px}

/* Mini button labels — non-clickable, matching real buttons */
.help-btn-label{
  display:inline-flex;align-items:center;
  padding:2px 7px;border-radius:5px;
  font-size:9px;font-weight:700;
  white-space:nowrap;flex-shrink:0;
  cursor:default;pointer-events:none;
  opacity:0.7;
}
.help-btn-label.save{background:rgba(34,197,94,.15);color:#22c55e;border:1px solid rgba(34,197,94,.3)}
.help-btn-label.tryagain{background:rgba(124,58,237,.15);color:#a78bfa;border:1px solid rgba(124,58,237,.3)}
.help-btn-label.showanswer{background:rgba(168,85,247,.1);color:#a855f7;border:1px solid rgba(168,85,247,.25)}
.help-btn-label.markreview{background:rgba(168,85,247,.12);color:#a855f7;border:1px solid rgba(168,85,247,.25)}
.help-btn-label.clear{background:rgba(239,68,68,.08);color:#6b7280;border:1px solid #1e2535}

/* OMR legend in help */
.help-omr-legend{display:flex;flex-direction:column;gap:5px}
.help-omr-item{display:flex;align-items:center;gap:8px;font-size:10px;color:#4b5563}
.help-omr-item strong{color:#6b7280;font-weight:700}
.help-bub{
  width:22px;height:22px;border-radius:4px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:8px;font-weight:900;flex-shrink:0;
  font-family:var(--mono);cursor:default;
}
.help-bub.current   {background:#a855f7;color:#fff}
.help-bub.correct   {background:#22c55e;color:#fff}
.help-bub.wrong     {background:#ef4444;color:#fff}
.help-bub.review    {background:#a855f7;color:#fff}
.help-bub.revealed  {background:#4b5563;color:#9ca3af}
.help-bub.unattempted{background:#0a0c10;color:#4b5563;border:1px solid #252d3d}

/* Scoring */
.help-scoring{display:flex;flex-direction:column;gap:4px}
.help-score-item{
  font-size:10px;font-weight:700;
  padding:3px 8px;border-radius:4px;
  font-family:var(--mono);
}
.correct-score{color:#22c55e;background:rgba(34,197,94,.06)}
.wrong-score  {color:#ef4444;background:rgba(239,68,68,.06)}
.zero-score   {color:#4b5563;background:rgba(255,255,255,.02)}

/* Study tip */
.help-tip{
  grid-column:1/-1;
  font-size:10px;color:#4b5563;
  padding:8px 12px;
  background:#0a0c10;
  border:1px solid #1a2030;
  border-left:2px solid #a855f7;
  border-radius:6px;
  line-height:1.6;
}
.help-tip strong{color:#6b7280}

@media(max-width:900px){
  .help-body{grid-template-columns:1fr}
}

/* ═══════════════════════════════════
   WELCOME SCREEN REDESIGN
═══════════════════════════════════ */
.welcome-wrap{
  padding-top:var(--header-h);
  min-height:100vh;overflow-y:auto;
  display:flex;align-items:flex-start;justify-content:center;
  padding:calc(var(--header-h) + 20px) 20px 40px;
  background:radial-gradient(ellipse at 20% 20%,rgba(168,85,247,.04),transparent 50%),
             radial-gradient(ellipse at 80% 80%,rgba(168,85,247,.04),transparent 50%);
}
.welcome-card{
  position:relative;overflow:hidden;
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:20px;padding:0;
  max-width:920px;width:100%;
  box-shadow:0 24px 80px rgba(0,0,0,.5);
}
.welcome-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#a855f7,#9333ea,#a855f7,#22d3ee,#22c55e);z-index:1}
.welcome-glow{position:absolute;top:-80px;right:-80px;width:300px;height:300px;background:radial-gradient(circle,rgba(168,85,247,.08),transparent 70%);pointer-events:none}
.welcome-glow2{position:absolute;bottom:-80px;left:-80px;width:300px;height:300px;background:radial-gradient(circle,rgba(168,85,247,.06),transparent 70%);pointer-events:none}

/* HERO */
.wc-hero{display:grid;grid-template-columns:1fr 1.4fr;gap:0;border-bottom:1px solid var(--border)}
.wc-hero-left{
  padding:28px 28px 24px;
  background:linear-gradient(135deg,#12161e,#0f1520);
  border-right:1px solid var(--border);
}
.wc-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:100px;
  background:rgba(168,85,247,.12);border:1px solid rgba(168,85,247,.3);
  font-size:11px;font-weight:800;color:var(--accent);
  letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px;
}
.wc-title{
  font-size:28px;font-weight:900;color:var(--text-bright);
  line-height:1.2;letter-spacing:-0.5px;margin-bottom:8px;
}
.wc-tagline{font-size:13px;color:var(--text-dim);margin-bottom:20px;font-style:italic}
.wc-stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.wc-stat{text-align:center;padding:10px 6px;background:rgba(0,0,0,.3);border-radius:8px;border:1px solid var(--border)}
.wc-stat-num{display:block;font-size:18px;font-weight:900;color:var(--accent);font-family:var(--mono);line-height:1}
.wc-stat-lbl{display:block;font-size:9px;color:var(--text-dim);margin-top:3px;font-weight:600;text-transform:uppercase;letter-spacing:.04em}

.wc-hero-right{padding:28px}
.wc-about{display:flex;flex-direction:column;gap:10px}
.wc-about-title{font-size:11px;font-weight:800;color:var(--text-dim);letter-spacing:.08em;text-transform:uppercase;margin-bottom:4px}
.wc-about p{font-size:13px;color:var(--text);line-height:1.7}
.wc-about strong{color:var(--text-bright);font-weight:700}

/* HOW TO START */
.wc-start-guide{
  display:flex;align-items:flex-start;gap:16px;
  padding:20px 28px;
  background:linear-gradient(135deg,rgba(168,85,247,.06),rgba(168,85,247,.02));
  border-bottom:1px solid var(--border);
}
.wc-start-arrow{
  font-size:28px;color:var(--accent);
  animation:bounce-up 1s ease-in-out infinite;
  margin-top:-4px;flex-shrink:0;
}
@keyframes bounce-up{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.wc-start-steps{flex:1}
.wc-start-title{font-size:14px;font-weight:800;color:var(--text-bright);margin-bottom:10px}
.wc-start-row{display:flex;align-items:center;gap:10px;margin-bottom:7px}
.wc-step-badge{
  width:22px;height:22px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--acc2));
  color:#fff;font-size:11px;font-weight:800;
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.wc-step-text{font-size:13px;color:var(--text)}
.wc-step-text strong{color:var(--text-bright)}
.wc-start-btn-label{
  display:inline-flex;align-items:center;gap:4px;
  padding:3px 12px;border-radius:6px;
  background:linear-gradient(135deg,var(--accent),var(--acc2));
  color:#fff;font-size:12px;font-weight:800;
  animation:btn-pulse 2s ease-in-out infinite;
  box-shadow:0 2px 10px rgba(168,85,247,.4);
}
@keyframes btn-pulse{0%,100%{box-shadow:0 2px 10px rgba(168,85,247,.4)}50%{box-shadow:0 2px 20px rgba(168,85,247,.7)}}

/* HOW IT WORKS */
.wc-how{padding:24px 28px;border-bottom:1px solid var(--border)}
.wc-how-title{font-size:12px;font-weight:800;color:var(--text-dim);letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px}
.wc-how-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.wc-how-item{padding:14px;background:var(--bg-card2);border-radius:10px;border:1px solid var(--border)}
.wc-how-icon{font-size:20px;margin-bottom:8px}
.wc-how-head{font-size:12px;font-weight:800;color:var(--text-bright);margin-bottom:5px}
.wc-how-body{font-size:11px;color:var(--text-dim);line-height:1.6}
.wc-how-body strong{color:var(--text);font-weight:700}
.wc-how-body em{color:var(--accent);font-style:normal;font-weight:600}

/* BOTTOM: Scoring + OMR + Tips */
.wc-bottom{display:grid;grid-template-columns:1fr 1fr 1.4fr;gap:0;border-bottom:1px solid var(--border)}
.wc-scoring,.wc-omr-key,.wc-tips{padding:18px 20px}
.wc-scoring{border-right:1px solid var(--border)}
.wc-omr-key{border-right:1px solid var(--border)}
.wc-mini-title{font-size:10px;font-weight:800;color:var(--text-dim);letter-spacing:.08em;text-transform:uppercase;margin-bottom:10px}
.wc-score-row{display:flex;align-items:center;gap:8px;margin-bottom:6px;font-size:12px;color:var(--text)}
.wc-score-pill{display:inline-flex;align-items:center;justify-content:center;width:28px;padding:2px 4px;border-radius:5px;font-size:11px;font-weight:900;font-family:var(--mono);text-align:center}
.wc-score-pill.correct{background:rgba(34,197,94,.15);color:#22c55e;border:1px solid rgba(34,197,94,.3)}
.wc-score-pill.wrong{background:rgba(239,68,68,.15);color:#ef4444;border:1px solid rgba(239,68,68,.3)}
.wc-score-pill.zero{background:rgba(100,116,139,.1);color:#64748b;border:1px solid var(--border)}
.wc-omr-row{display:flex;align-items:center;gap:8px;margin-bottom:6px;font-size:12px;color:var(--text)}
.wc-bub{width:22px;height:22px;border-radius:4px;display:inline-flex;align-items:center;justify-content:center;font-size:8px;font-weight:900;color:#fff;flex-shrink:0;font-family:var(--mono)}
.wc-tip{font-size:11px;color:var(--text-dim);margin-bottom:5px;line-height:1.5}
.wc-tip strong{color:var(--text);font-weight:700}

/* Footer */
.welcome-footer{display:flex;align-items:center;gap:10px;padding:14px 20px}
.subj-link{padding:5px 12px;border-radius:7px;font-size:13px;font-weight:600;border:1px solid var(--border2);color:var(--text-dim);transition:all .2s}
.chem-link:hover{border-color:#22d3ee;color:#22d3ee}
.bot-link:hover{border-color:#22c55e;color:#22c55e}

@media(max-width:768px){
  .wc-hero{grid-template-columns:1fr}
  .wc-how-grid{grid-template-columns:1fr 1fr}
  .wc-bottom{grid-template-columns:1fr}
  .wc-scoring,.wc-omr-key{border-right:none;border-bottom:1px solid var(--border)}
  .wc-stats-row{grid-template-columns:repeat(2,1fr)}
}

/* MLP Hero Title */
.wc-title{
  font-size:36px !important;
  font-weight:900 !important;
  color:var(--text-bright) !important;
  line-height:1.1 !important;
  letter-spacing:-1px !important;
  margin-bottom:4px !important;
}
.wc-mlp-highlight{
  color:var(--accent);
  font-family:var(--orb);
  font-size:40px;
  font-weight:900;
  letter-spacing:.05em;
  text-shadow:0 0 20px rgba(168,85,247,.5),0 0 40px rgba(168,85,247,.2);
  display:inline-block;
  animation:mlp-glow 3s ease-in-out infinite;
}
@keyframes mlp-glow{
  0%,100%{text-shadow:0 0 20px rgba(168,85,247,.5),0 0 40px rgba(168,85,247,.2)}
  50%{text-shadow:0 0 30px rgba(168,85,247,.8),0 0 60px rgba(168,85,247,.4),0 0 80px rgba(168,85,247,.1)}
}
.wc-subtitle{
  font-size:16px;
  font-weight:700;
  color:#94a3b8;
  letter-spacing:.04em;
  margin-bottom:6px;
  text-transform:uppercase;
  font-size:13px;
}

.wc-subtitle-mlp{
  font-size:22px;
  font-weight:900;
  margin-bottom:6px;
  letter-spacing:.02em;
}

/* ═══ MOBILE HEADER FIX ═══ */
@media(max-width:768px){
  html,body{overflow:auto !important}

  .main-header{height:auto !important;position:relative !important}

  .header-row1{
    height:auto !important;
    padding:10px 14px !important;
    flex-wrap:wrap;gap:8px;
  }
  .brand-logo img{width:36px !important;height:36px !important}
  .brand-name{font-size:17px !important}
  .brand-mlp{font-size:10px !important}
  .mlp-banner{flex:none !important;width:100% !important;order:3}

  .header-row2{
    height:auto !important;
    padding:8px 14px !important;
    flex-direction:column !important;
    align-items:stretch !important;
    gap:8px !important;
  }

  .session-controls{
    flex-direction:column !important;
    gap:8px !important;
    width:100% !important;
  }
  .nav-select-group{width:100% !important}
  .nav-select{width:100% !important;font-size:14px !important;padding:8px 10px !important}
  .microtopic-select{min-width:unset !important;max-width:100% !important;width:100% !important}
  .start-btn{width:100% !important;padding:10px !important;font-size:14px !important;text-align:center !important}

  .session-status{flex-wrap:wrap !important;gap:8px !important}
  .timer-box{font-size:13px !important}

  /* Exam layout — single column */
  .exam-layout{
    grid-template-columns:1fr !important;
    height:auto !important;
    padding-top:0 !important;
  }
  .question-panel{
    height:auto !important;
    overflow:visible !important;
    padding:12px !important;
    padding-bottom:20px !important;
  }
  .omr-panel{
    position:relative !important;
    height:auto !important;
    border-left:none !important;
    border-top:1px solid var(--border) !important;
  }

  /* Welcome screen */
  .welcome-wrap{padding:10px !important}
  .wc-hero{grid-template-columns:1fr !important}
  .wc-hero-right{border-top:1px solid var(--border);border-right:none !important}
  .wc-how-grid{grid-template-columns:1fr 1fr !important}
  .wc-bottom{grid-template-columns:1fr !important}
  .wc-scoring,.wc-omr-key{border-right:none !important;border-bottom:1px solid var(--border) !important}
  .wc-stats-row{grid-template-columns:repeat(2,1fr) !important}
  .wc-title{font-size:22px !important}

  /* Action buttons wrap */
  .action-bar{flex-wrap:wrap !important;gap:6px !important}
  .action-btn{font-size:12px !important;padding:8px 12px !important}
  .submit-btn{margin-left:0 !important;width:100% !important}
}

@media(max-width:480px){
  .wc-how-grid{grid-template-columns:1fr !important}
  .brand-mlp{display:none !important}
}