/* ============================================================
   Quiz UI
   ============================================================ */
.screen{}
.hidden{display:none!important}

/* PICKER */
.quiz-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.quiz-loading{padding:48px;text-align:center;color:var(--muted);grid-column:span 2}
.quiz-card{background:#fff;border:1.5px solid var(--line);border-radius:18px;padding:28px;transition:transform .2s,box-shadow .2s,border-color .2s;display:flex;flex-direction:column;gap:14px}
.quiz-card:hover{transform:translateY(-4px);box-shadow:0 18px 44px -22px rgba(31,33,39,.18);border-color:var(--red-soft)}
.qc-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.qc-num{width:46px;height:46px;border-radius:12px;background:var(--red-soft);color:var(--red);display:grid;place-items:center;font-weight:800;font-size:18px;flex-shrink:0}
.qc-meta{display:flex;gap:6px;flex-wrap:wrap}
.qc-tag{font-size:11px;font-weight:700;padding:4px 10px;border-radius:999px;background:#F2F3F5;color:#4b5160}
.qc-tag.red{background:var(--red-soft);color:var(--red)}
.qc-tag.green{background:rgba(16,185,129,.12);color:#06694e}
.qc-title{font-size:18px;font-weight:700;line-height:1.35}
.qc-sub{font-size:14px;color:var(--muted);line-height:1.55}
.qc-btn{margin-top:6px;width:100%;justify-content:center}

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

/* QUIZ BAR */
.quiz-bar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:78px;z-index:40}
.quiz-bar-in{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:18px;padding:14px 0;min-height:70px}
.qb-left{display:flex;align-items:center;gap:14px}
.qb-exit{width:38px;height:38px;border-radius:10px;background:#F2F3F5;border:0;display:grid;place-items:center;cursor:pointer;color:#4b5160}
.qb-exit:hover{background:var(--red-soft);color:var(--red)}
.qb-title{font-size:15px;font-weight:700;line-height:1.2}
.qb-sub{font-size:12px;color:var(--muted);margin-top:2px}
.qb-mid{display:flex;flex-direction:column;gap:6px;min-width:0}
.qb-progress{height:6px;background:#F1F3F5;border-radius:99px;overflow:hidden}
.qb-progress > i{display:block;height:100%;background:linear-gradient(90deg,#E63946,#F08089);border-radius:99px;width:0%;transition:width .25s}
.qb-progress-text{font-size:12px;color:var(--muted);text-align:right}
.qb-right{display:flex;align-items:center;gap:10px}
.timer{display:flex;align-items:center;gap:8px;background:var(--red-soft);color:var(--red);font-weight:700;padding:9px 14px;border-radius:10px;font-variant-numeric:tabular-nums}
.timer.warn{background:#FFF3D6;color:#9a6f00}
.timer.danger{background:#FFE5E7;color:var(--red);animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.55}}

/* LAYOUT */
.quiz-layout{display:grid;grid-template-columns:1fr 280px;gap:32px;padding:32px 0 80px;align-items:start}
.quiz-main{min-width:0}
.quiz-side{position:sticky;top:170px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}
.quiz-side h4{font-size:14px;font-weight:700;margin-bottom:12px}
.palette{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin-bottom:14px}
.palette button{aspect-ratio:1;border:1.5px solid var(--line);background:#fff;border-radius:8px;font-size:12.5px;font-weight:700;color:#4b5160;cursor:pointer;font-family:inherit;transition:all .15s}
.palette button:hover{border-color:var(--red)}
.palette button.answered{background:rgba(16,185,129,.12);border-color:rgba(16,185,129,.4);color:#06694e}
.palette button.current{background:var(--red);color:#fff;border-color:var(--red)}
.palette button.flagged::after{content:"";position:absolute;top:2px;right:2px;width:6px;height:6px;background:#F5A623;border-radius:50%}
.palette-legend{display:flex;flex-direction:column;gap:6px;font-size:12px;color:var(--muted)}
.palette-legend .dot{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:6px;vertical-align:-2px;border:1.5px solid var(--line)}
.palette-legend .dot.answered{background:rgba(16,185,129,.4);border-color:rgba(16,185,129,.4)}
.palette-legend .dot.current{background:var(--red);border-color:var(--red)}

/* QUESTION CARD */
.question-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:32px;min-height:300px}
.qc-section{font-size:12.5px;color:var(--red);font-weight:700;text-transform:uppercase;letter-spacing:.05em;margin-bottom:10px}
.qc-passage{margin-bottom:20px;padding:18px 20px;border-left:4px solid var(--red-soft);background:#FAFBFC;border-radius:0 10px 10px 0;font-size:14.5px;color:#374151;line-height:1.7;white-space:pre-wrap}
.qc-passage b{background:#FFE5E7;padding:2px 6px;border-radius:4px;color:var(--red);font-weight:700}
.qc-qnum{font-size:13px;color:var(--muted);font-weight:600;margin-bottom:6px}
.qc-stem{font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;margin-bottom:10px}
.qc-body{font-size:15px;color:#374151;line-height:1.75;margin-bottom:18px;white-space:pre-wrap}
.qc-options{display:flex;flex-direction:column;gap:10px}
.qc-option{display:flex;gap:14px;align-items:flex-start;padding:14px 18px;border:1.5px solid var(--line);border-radius:12px;cursor:pointer;transition:border-color .12s,background .12s;font-size:15px;color:#374151}
.qc-option:hover{border-color:#C8CCD2;background:#FAFBFC}
.qc-option.selected{border-color:var(--red);background:#FFF6F7}
.qc-option .letter{flex-shrink:0;width:30px;height:30px;border-radius:50%;background:#F2F3F5;color:#4b5160;font-weight:700;font-size:14px;display:grid;place-items:center}
.qc-option.selected .letter{background:var(--red);color:#fff}
.qc-option input{position:absolute;opacity:0;pointer-events:none}

.quiz-nav{display:flex;gap:12px;margin-top:22px;justify-content:space-between;flex-wrap:wrap}
.quiz-nav .btn-red{margin-left:auto}

/* GATE */
.gate-card{max-width:560px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:20px;padding:40px 32px;text-align:center;box-shadow:0 24px 56px -28px rgba(31,33,39,.18)}
.gate-ic{width:84px;height:84px;border-radius:50%;background:var(--red-soft);color:var(--red);display:grid;place-items:center;margin:0 auto 18px}
.gate-card h2{font-size:24px;font-weight:800;margin-bottom:8px}
.gate-card > p{color:var(--muted);font-size:15px;line-height:1.65}
.gate-card .form-grid{text-align:left}

/* RESULT */
.result-top{display:grid;grid-template-columns:auto 1fr;gap:30px;align-items:center;max-width:760px;margin:0 auto;text-align:left}
.result-score{position:relative;width:120px;height:120px}
.result-score-text{position:absolute;inset:0;display:grid;place-items:center;flex-direction:column;text-align:center}
.rs-num{font-size:22px;font-weight:800;color:var(--ink);line-height:1}
.rs-pct{font-size:13px;color:var(--muted);margin-top:2px}
.rs-rank{display:inline-block;font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px;background:var(--red-soft);color:var(--red);letter-spacing:.03em;text-transform:uppercase}

.review-list{display:flex;flex-direction:column;gap:14px}
.review-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 22px}
.review-item.wrong{border-left:4px solid var(--red)}
.review-item.right{border-left:4px solid var(--green)}
.review-q{font-size:13px;color:var(--muted);font-weight:600;display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.review-q .badge{font-size:11px;font-weight:700;padding:3px 8px;border-radius:99px}
.review-q .badge.right{background:rgba(16,185,129,.12);color:#06694e}
.review-q .badge.wrong{background:var(--red-soft);color:var(--red)}
.review-stem{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:10px}
.review-opts{display:grid;grid-template-columns:repeat(2,1fr);gap:6px;margin-bottom:12px}
.review-opt{font-size:13.5px;padding:8px 12px;border-radius:8px;background:#FAFBFC;color:#4b5160;display:flex;gap:8px;align-items:flex-start;border:1px solid transparent}
.review-opt.user{background:#FFF3F4;border-color:var(--red-soft)}
.review-opt.correct{background:rgba(16,185,129,.1);color:#06694e;border-color:rgba(16,185,129,.3)}
.review-opt b{font-weight:800;flex-shrink:0}
.review-note{font-size:13.5px;background:#FFF8E1;border-left:3px solid #F5A623;padding:10px 14px;border-radius:6px;color:#735410;line-height:1.6}
.review-note b{color:#000}

@media (max-width:900px){
  .quiz-layout{grid-template-columns:1fr}
  .quiz-side{position:static;order:2}
  .palette{grid-template-columns:repeat(8,1fr)}
  .result-top{grid-template-columns:1fr;text-align:center;justify-items:center}
  .review-opts{grid-template-columns:1fr}
  .quiz-bar{top:68px}
}
@media (max-width:640px){
  .quiz-bar-in{grid-template-columns:auto 1fr;grid-template-rows:auto auto;gap:10px;padding:10px 0}
  .qb-right{grid-column:2;justify-self:end}
  .qb-mid{grid-column:1/-1}
  .question-card{padding:22px 18px}
  .qc-option{padding:12px 14px;font-size:14px}
  .gate-card{padding:28px 20px}
  .palette{grid-template-columns:repeat(6,1fr)}
}