/* =============================================================
   HocMai — Exam Room CSS v5.0 Premium Edition
   Full class-match with single-tracnghiem.php template
   Glass morphism + micro-animations + sticky sidebar
   ============================================================= */

/* ══════════════════════════════════════════════════════════════
   EXAM TOPBAR — sticky glass progress bar
═══════════════════════════════════════════════════════════════ */
.hmt-exam-topbar {
  position: sticky;
  top: var(--nav-h);
  z-index: 80;
  background: rgba(248,247,255,0.92);
  backdrop-filter: blur(24px) saturate(200%);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  border-bottom: 1px solid var(--border-glass);
  height: 56px;
  box-shadow: 0 2px 16px rgba(107,70,193,0.08);
}
.hmt-exam-topbar-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}
.hmt-exam-topbar-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-left: auto;
  flex-shrink: 0;
}

/* Progress bar in topbar */
.hmt-topbar-progress {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  min-width: 80px;
  max-width: 160px;
}
.hmt-topbar-progress-bar {
  flex: 1;
  height: 8px;
  background: var(--border-glass);
  border-radius: var(--r-full);
  overflow: hidden;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.06);
}
.hmt-topbar-progress-fill {
  height: 100%; position: relative;
  background: linear-gradient(90deg, var(--clr-violet-500), var(--clr-pink-400));
  border-radius: var(--r-full);
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0%;
}
.hmt-topbar-progress-fill::after {
  content: ''; position: absolute;
  top: 0; right: 0; bottom: 0; width: 12px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.8));
  box-shadow: 0 0 10px rgba(255,255,255,0.8);
  border-radius: inherit;
}
.hmt-topbar-progress-pct {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 30px;
  text-align: right;
}

/* Timer pill */
.hmt-topbar-timer {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-sm); font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
  padding: 5px 14px;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border-radius: var(--r-full);
  border: 1.5px solid var(--border);
  transition: all var(--dur);
  letter-spacing: .02em;
}
.hmt-topbar-timer.warning {
  background: rgba(220,38,38,0.06);
  color: var(--red);
  border-color: #fecaca;
  animation: pulse-red 1s ease infinite alternate;
}
@keyframes pulse-red {
  from { box-shadow: none; }
  to   { box-shadow: 0 0 0 5px rgba(220,38,38,0.12); }
}

/* Progress badge */
.hmt-topbar-stat {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: var(--text-sm); font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* Nộp bài button */
.hmt-btn-nopbai {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 20px;
  background: linear-gradient(135deg, var(--clr-violet-600), var(--clr-violet-500));
  color: #fff;
  border: none;
  border-radius: var(--r-full);
  font-size: var(--text-sm); font-weight: 700;
  cursor: pointer;
  transition: transform var(--dur-fast), box-shadow var(--dur-fast), opacity var(--dur-fast);
  box-shadow: var(--shadow-btn);
  letter-spacing: -.01em;
  white-space: nowrap;
}
.hmt-btn-nopbai:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 20px rgba(124,58,237,0.45);
}
.hmt-btn-nopbai:active { transform: scale(0.97); }
.hmt-btn-nopbai:disabled {
  opacity: .45;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Mobile Quick Navigation Button */
.hmt-btn-qnav-mobile {
  display: none;
}
@media (max-width: 768px) {
  .hmt-btn-qnav-mobile {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px; height: 32px;
    background: rgba(124,58,237,0.08);
    border: 1.5px solid rgba(139,92,246,0.15);
    border-radius: var(--r-md);
    color: var(--primary);
    transition: all var(--dur-fast);
    text-decoration: none;
  }
  .hmt-btn-qnav-mobile:active { transform: scale(0.95); }
}

/* ══════════════════════════════════════════════════════════════
   EXAM LAYOUT — 2 column: main + sidebar
═══════════════════════════════════════════════════════════════ */
.hmt-exam-container { padding-top: var(--sp-6); padding-bottom: var(--sp-20); }

.hmt-exam-layout {
  display: grid;
  grid-template-columns: 1fr 288px;
  gap: var(--sp-6);
  align-items: start;
}
@media (max-width: 1024px) { .hmt-exam-layout { grid-template-columns: 1fr 240px; } }
@media (max-width: 768px)  {
  .hmt-exam-layout { grid-template-columns: 1fr; }
  .hmt-nav-sidebar { order: -1; }
  .hmt-exam-topbar .hmt-breadcrumb { display: none; }
}

/* ══════════════════════════════════════════════════════════════
   EXAM INFO BOX (intro card)
═══════════════════════════════════════════════════════════════ */
.hmt-exam-info-box {
  background: linear-gradient(135deg, var(--clr-indigo-950) 0%, var(--clr-indigo-800) 100%);
  border: 1px solid rgba(167,139,250,0.2);
  border-radius: var(--r-xl);
  padding: var(--sp-6) var(--sp-8);
  color: #fff;
  margin-bottom: var(--sp-6);
  position: relative;
  overflow: hidden;
}
.hmt-exam-info-box::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 10% 80%, rgba(167,139,250,0.22), transparent 55%),
    radial-gradient(ellipse at 90% 10%, rgba(236,72,153,0.12), transparent 45%);
  pointer-events: none;
}
.hmt-exam-info-box::after {
  content: '';
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.hmt-exam-title {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -.03em;
  line-height: 1.3;
  margin-bottom: var(--sp-4);
  position: relative; z-index: 1;
}
.hmt-exam-sapo {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.75);
  line-height: 1.6;
  margin-bottom: var(--sp-4);
  position: relative; z-index: 1;
}
.hmt-exam-info-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
  align-items: center;
  position: relative; z-index: 1;
}
.hmt-info-item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: var(--text-sm);
  font-weight: 600;
  color: rgba(255,255,255,0.8);
}
.hmt-info-item svg { opacity: .7; flex-shrink: 0; }
.hmt-info-item strong { color: #fff; font-weight: 800; }
.hmt-info-scope { font-size: var(--text-sm); color: rgba(255,255,255,0.7); }

/* Term badges inside info box */
.hmt-badge {
  display: inline-flex; align-items: center;
  padding: 3px 12px;
  border-radius: var(--r-full);
  font-size: var(--text-xs); font-weight: 700;
  white-space: nowrap; letter-spacing: .02em;
}
.hmt-badge--grade   { background: rgba(251,191,36,0.2); color: #fbbf24; border: 1px solid rgba(251,191,36,0.3); }
.hmt-badge--subject { background: rgba(167,139,250,0.2); color: #c4b5fd; border: 1px solid rgba(167,139,250,0.3); }
.hmt-badge--scope   { background: rgba(52,211,153,0.15); color: #6ee7b7; border: 1px solid rgba(52,211,153,0.25); }

/* ══════════════════════════════════════════════════════════════
   QUESTION CARDS — glass morphism
   WordPress outputs .hm-question, .hm-answer, .hm-answer-key
═══════════════════════════════════════════════════════════════ */
.hmt-questions-list { display: flex; flex-direction: column; gap: var(--sp-5); }

.hm-question {
  background: rgba(255,255,255,0.78);
  border: 1.5px solid rgba(255,255,255,0.55);
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(107,70,193,0.07), 0 1px 3px rgba(0,0,0,0.04);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur);
  animation: cardAppear 0.4s var(--ease) both;
  position: relative;
}
.hm-question:hover {
  box-shadow: 0 8px 32px rgba(107,70,193,0.14), 0 2px 8px rgba(0,0,0,0.05);
  border-color: rgba(124,58,237,0.2);
}
.hm-question.current-focus {
  border-color: rgba(124,58,237,0.4);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.1), 0 8px 32px rgba(107,70,193,0.16);
}

/* Answer options */
.hm-answer {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: var(--sp-4);
  padding: 16px 20px;
  border: 1.5px solid rgba(139,92,246,0.12);
  border-radius: var(--r-xl);
  margin: 0 var(--sp-6) var(--sp-3);
  cursor: pointer;
  transition: all var(--dur-fast);
  background: rgba(255,255,255,0.85); /* Tăng Opacity do bỏ blur */
  user-select: none;
  line-height: 1.6;
  font-size: var(--text-base); font-weight: 500;
  color: var(--text);
}
.hm-answer:last-of-type { margin-bottom: var(--sp-6); }
.hm-answer:hover {
  border-color: var(--primary);
  background: rgba(255,255,255,0.9);
  transform: translateX(6px);
  box-shadow: 0 4px 20px rgba(124,58,237,0.12), inset 0 0 0 1px rgba(124,58,237,0.1);
}
.hm-answer.selected {
  border-color: var(--primary);
  background: var(--primary-soft);
  box-shadow: 0 0 0 4px rgba(124,58,237,0.15), inset 0 0 0 1px var(--primary);
  transform: none;
}
.hm-answer.locked { cursor: default; pointer-events: none; }
.hm-answer.locked:hover { transform: none; }

/* Answer key badge */
.hm-answer-key {
  flex-shrink: 0;
  width: 32px; height: 32px;
  border-radius: var(--r-md);
  background: var(--bg-muted);
  border: 1.5px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: var(--text-sm); font-weight: 800;
  color: var(--text-secondary);
  transition: background var(--dur-fast), border-color var(--dur-fast), color var(--dur-fast);
  margin-top: 1px;
}
.hm-answer.selected .hm-answer-key {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(124,58,237,0.35);
}
.hm-answer.correct {
  border-color: var(--green) !important;
  background: var(--green-soft) !important;
  box-shadow: 0 0 0 3px rgba(5,150,105,0.12) !important;
  transform: none !important;
}
.hm-answer.correct .hm-answer-key {
  background: var(--green) !important;
  border-color: var(--green) !important;
  color: #fff !important;
}
.hm-answer.wrong {
  border-color: var(--red) !important;
  background: var(--red-soft) !important;
  box-shadow: 0 0 0 3px rgba(220,38,38,0.12) !important;
  transform: none !important;
}
.hm-answer.wrong .hm-answer-key {
  background: var(--red) !important;
  border-color: var(--red) !important;
  color: #fff !important;
}

/* ══════════════════════════════════════════════════════════════
   NAVIGATOR SIDEBAR
   Template uses: .hmt-nav-sidebar > .hmt-nav-sidebar-inner
═══════════════════════════════════════════════════════════════ */
.hmt-nav-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 56px + var(--sp-6));
  max-height: calc(100vh - var(--nav-h) - 56px - var(--sp-12));
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--primary-glow) transparent;
}
.hmt-nav-sidebar::-webkit-scrollbar { width: 4px; }
.hmt-nav-sidebar::-webkit-scrollbar-track { background: transparent; }
.hmt-nav-sidebar::-webkit-scrollbar-thumb { background: var(--primary-glow); border-radius: 4px; }

.hmt-nav-sidebar-inner {
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: var(--r-xl);
  padding: var(--sp-5);
  box-shadow: 0 4px 24px rgba(107,70,193,0.10), 0 1px 4px rgba(0,0,0,0.04);
}

.hmt-nav-sidebar-title {
  font-size: var(--text-xs); font-weight: 800;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--text-muted);
  margin-bottom: var(--sp-4);
  display: flex; align-items: center; gap: var(--sp-2);
}

/* Question navigator grid */
.hmt-qnav-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  margin-bottom: var(--sp-4);
}
.hmt-qnav-btn {
  aspect-ratio: 1;
  border: 1.5px solid rgba(139,92,246,0.12);
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  font-size: .6875rem; font-weight: 700;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--dur-fast);
  display: flex; align-items: center; justify-content: center;
  line-height: 1;
  font-family: var(--font);
}
.hmt-qnav-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(124,58,237,0.08);
  transform: scale(1.15) translateY(-2px);
  box-shadow: 0 6px 16px rgba(124,58,237,0.2);
}
.hmt-qnav-btn.done {
  background: linear-gradient(135deg, var(--clr-violet-500), #9333ea);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 12px rgba(124,58,237,0.3);
}
.hmt-qnav-btn.correct {
  background: linear-gradient(135deg, #10b981, #059669);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 12px rgba(16,185,129,0.3);
}
.hmt-qnav-btn.wrong {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 12px rgba(239,68,68,0.3);
}
.hmt-qnav-btn.current {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(124,58,237,0.15), 0 8px 24px rgba(124,58,237,0.25);
  background: #fff;
  color: var(--primary);
  transform: scale(1.08);
}

/* Legend */
.hmt-nav-legend {
  display: flex; flex-direction: column; gap: 6px;
  padding: var(--sp-3) 0;
  border-top: 1px solid rgba(139,92,246,0.08);
  border-bottom: 1px solid rgba(139,92,246,0.08);
  margin-bottom: var(--sp-3);
}
.hmt-legend-item {
  display: flex; align-items: center; gap: var(--sp-2);
  font-size: .6875rem; color: var(--text-muted); font-weight: 500;
}
.dot { width: 11px; height: 11px; border-radius: 3px; flex-shrink: 0; }
.dot-blank   { background: rgba(248,247,255,1); border: 1.5px solid rgba(139,92,246,0.2); }
.dot-done    { background: var(--primary); }
.dot-correct { background: var(--green); }
.dot-wrong   { background: var(--red); }

/* Progress bar in sidebar */
.hmt-nav-progress {
  display: flex; align-items: center; gap: var(--sp-2);
  font-size: var(--text-xs); font-weight: 600; color: var(--text-muted);
}
.hmt-nav-progress-bar {
  flex: 1; height: 5px;
  background: rgba(139,92,246,0.1);
  border-radius: var(--r-full); overflow: hidden;
}
.hmt-nav-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--clr-violet-500), var(--clr-pink-400));
  border-radius: var(--r-full);
  transition: width 0.4s var(--ease);
  width: 0%;
}

/* ══════════════════════════════════════════════════════════════
   SUBMIT AREA
═══════════════════════════════════════════════════════════════ */
.hmt-submit-area {
  background: rgba(255,255,255,0.78);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.55);
  border-radius: var(--r-xl);
  padding: var(--sp-6) var(--sp-8);
  text-align: center;
  margin-top: var(--sp-5);
  box-shadow: 0 4px 24px rgba(107,70,193,0.08);
}
.hmt-btn-submit-main {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  background: linear-gradient(135deg, var(--clr-indigo-800) 0%, var(--clr-violet-500) 100%);
  color: #fff;
  border: none;
  border-radius: var(--r-full);
  font-size: var(--text-md); font-weight: 800;
  cursor: pointer;
  transition: transform var(--dur-fast), box-shadow var(--dur-fast);
  box-shadow: 0 6px 24px rgba(124,58,237,0.4);
  letter-spacing: -.02em;
  font-family: var(--font);
}
.hmt-btn-submit-main:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 10px 32px rgba(124,58,237,0.5);
}
.hmt-btn-submit-main:active { transform: scale(0.97); }
.hmt-submit-hint {
  margin-top: var(--sp-3);
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-weight: 500;
}

/* ══════════════════════════════════════════════════════════════
   RESULTS PANEL
═══════════════════════════════════════════════════════════════ */
.hmt-results-panel {
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.55);
  border-radius: var(--r-2xl);
  overflow: hidden;
  box-shadow: 0 8px 48px rgba(107,70,193,0.16);
  margin-bottom: var(--sp-6);
  animation: slideUp 0.5s var(--ease) both;
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Score hero row */
.hmt-results-score {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
  padding: var(--sp-8) var(--sp-8) var(--sp-6);
  background: linear-gradient(135deg, var(--clr-indigo-950) 0%, var(--clr-indigo-800) 100%);
  position: relative; overflow: hidden;
}
.hmt-results-score::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(167,139,250,0.2), transparent 60%),
              radial-gradient(ellipse at 80% 20%, rgba(236,72,153,0.1), transparent 50%);
  pointer-events: none;
}
@media (max-width: 600px) {
  .hmt-results-score { flex-direction: column; align-items: center; text-align: center; padding: var(--sp-6) var(--sp-5); }
}

/* Score circle (SVG ring) */
.hmt-score-circle {
  position: relative;
  width: 170px; height: 170px; /* Tăng kích thước từ 120px lên 170px */
  flex-shrink: 0; z-index: 1;
  display: flex; align-items: center; justify-content: center;
  margin-right: var(--sp-4);
}
.hmt-score-svg {
  width: 100%; height: 100%;
  position: absolute; inset: 0;
  filter: drop-shadow(0 4px 12px rgba(91, 33, 182, 0.5));
}
.hmt-score-track { fill: none; stroke: rgba(255,255,255,0.08); stroke-width: 8; }
.hmt-score-arc {
  fill: none; stroke: var(--clr-violet-400); stroke-width: 8;
  stroke-linecap: round;
  transition: stroke-dashoffset 1.4s cubic-bezier(.4,0,.2,1);
}
.hmt-score-text {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.hmt-score-num {
  font-size: 2.8rem; font-weight: 900;
  color: #fff; letter-spacing: -.02em; line-height: 1;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}
.hmt-score-denom {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.85); font-weight: 600;
  margin-top: 4px;
}

/* Score text block */
.hmt-score-details { flex: 1; z-index: 1; }
.hmt-score-pct {
  font-size: var(--text-4xl); font-weight: 900;
  color: #fff; letter-spacing: -.05em;
  line-height: 1; margin-bottom: var(--sp-2);
}
.hmt-score-label {
  font-size: var(--text-md); color: rgba(255,255,255,.7);
  line-height: 1.5; margin-bottom: var(--sp-5);
}
.hmt-result-actions { display: flex; gap: var(--sp-3); }
.hmt-btn-retry {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 24px;
  background: rgba(255,255,255,0.12);
  color: #fff; border: 1.5px solid rgba(255,255,255,0.25);
  border-radius: var(--r-full);
  font-size: var(--text-sm); font-weight: 700;
  cursor: pointer; backdrop-filter: blur(8px);
  transition: background var(--dur-fast), border-color var(--dur-fast), transform var(--dur-fast);
  font-family: var(--font);
}
.hmt-btn-retry:hover {
  background: rgba(255,255,255,0.22);
  border-color: rgba(255,255,255,0.45);
  transform: translateY(-2px);
}

/* Breakdown stats (JS-rendered cards) */
.hmt-results-breakdown { padding: var(--sp-6) var(--sp-8); }
.hmt-results-breakdown-title {
  font-size: var(--text-xs); font-weight: 800;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--text-muted); margin-bottom: var(--sp-4);
}
.hmt-result-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-4);
  margin-bottom: var(--sp-4);
}
.hmt-result-card {
  border-radius: var(--r-lg);
  padding: var(--sp-5) var(--sp-3);
  text-align: center;
  border: 1.5px solid transparent;
}
.hmt-result-card--correct { background: var(--green-soft); border-color: rgba(5,150,105,0.2); }
.hmt-result-card--correct .hmt-result-card-num { color: var(--green); }
.hmt-result-card--wrong   { background: var(--red-soft);   border-color: rgba(220,38,38,0.15); }
.hmt-result-card--wrong   .hmt-result-card-num { color: var(--red); }
.hmt-result-card--skipped { background: var(--bg-muted);   border-color: var(--border); }
.hmt-result-card--skipped .hmt-result-card-num { color: var(--text-muted); }
.hmt-result-card-num {
  font-size: var(--text-3xl); font-weight: 900;
  letter-spacing: -.04em; display: block; line-height: 1.1;
}
.hmt-result-card-label {
  font-size: var(--text-xs); color: var(--text-muted);
  font-weight: 600; margin-top: 4px;
}
.hmt-no-answer-notice {
  background: var(--gold-soft);
  border: 1px solid #fde68a;
  border-radius: var(--r-lg);
  padding: var(--sp-4) var(--sp-5);
  font-size: var(--text-sm); color: #78350f;
  line-height: 1.6; margin-top: var(--sp-4);
}

/* ══════════════════════════════════════════════════════════════
   CONFIRM MODAL
   Template: .hmt-confirm-overlay > .hmt-confirm-box
═══════════════════════════════════════════════════════════════ */
.hmt-confirm-overlay {
  position: fixed; inset: 0;
  background: rgba(15,10,46,0.65);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: var(--sp-4);
  opacity: 0; pointer-events: none;
  transition: opacity var(--dur) var(--ease);
}
.hmt-confirm-overlay.open { opacity: 1; pointer-events: all; }
.hmt-confirm-box {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  border: 1px solid rgba(255,255,255,0.7);
  border-radius: var(--r-2xl);
  padding: var(--sp-8);
  max-width: 420px; width: 100%;
  box-shadow: 0 24px 80px rgba(0,0,0,0.2), 0 4px 16px rgba(0,0,0,0.08);
  transform: scale(0.9) translateY(20px);
  transition: transform var(--dur-slow) var(--ease);
}
.hmt-confirm-overlay.open .hmt-confirm-box { transform: scale(1) translateY(0); }
.hmt-confirm-icon {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, var(--primary-soft), var(--clr-violet-200));
  border-radius: var(--r-xl);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  margin: 0 auto var(--sp-5);
  box-shadow: 0 4px 16px rgba(124,58,237,0.2);
}
.hmt-confirm-box h3 {
  font-size: var(--text-xl); font-weight: 800;
  text-align: center; margin-bottom: var(--sp-3);
  letter-spacing: -.025em; color: var(--text);
}
.hmt-confirm-box p {
  font-size: var(--text-sm); color: var(--text-secondary);
  text-align: center; line-height: 1.65;
  margin-bottom: var(--sp-5);
}
.hmt-confirm-box p strong { color: var(--text); font-weight: 700; }
.hmt-confirm-actions { display: flex; gap: var(--sp-3); }
.hmt-btn-cancel {
  flex: 1; padding: 12px;
  border-radius: var(--r-lg); font-size: var(--text-sm); font-weight: 700;
  border: 1.5px solid var(--border); cursor: pointer;
  background: var(--bg-muted); color: var(--text-secondary);
  transition: background var(--dur-fast), color var(--dur-fast), border-color var(--dur-fast);
  font-family: var(--font);
}
.hmt-btn-cancel:hover { background: var(--border); color: var(--text); border-color: rgba(139,92,246,0.25); }
.hmt-btn-confirm {
  flex: 1; padding: 12px;
  border-radius: var(--r-lg); font-size: var(--text-sm); font-weight: 700;
  border: none; cursor: pointer;
  background: linear-gradient(135deg, var(--primary), var(--clr-violet-500));
  color: #fff; box-shadow: var(--shadow-btn);
  display: flex; align-items: center; justify-content: center; gap: 7px;
  transition: transform var(--dur-fast), box-shadow var(--dur-fast);
  font-family: var(--font);
}
.hmt-btn-confirm:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(124,58,237,0.45); }
.hmt-btn-confirm:active { transform: scale(0.97); }

/* ══════════════════════════════════════════════════════════════
   EXPLANATION BLOCK
═══════════════════════════════════════════════════════════════ */
.hmt-explanation, .hm-explanation {
  margin-top: var(--sp-4);
  padding: var(--sp-4) var(--sp-5);
  background: rgba(5,150,105,0.05);
  border: 1px solid rgba(5,150,105,0.18);
  border-radius: var(--r-lg);
  font-size: var(--text-sm); color: var(--text-secondary);
  line-height: 1.65;
  animation: cardAppear 0.3s var(--ease) both;
}
.hmt-explanation-header {
  display: flex; align-items: center; gap: var(--sp-2);
  font-weight: 700; color: var(--green);
  margin-bottom: var(--sp-2); font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: .08em;
}

/* ══════════════════════════════════════════════════════════════
   EMPTY STATE
═══════════════════════════════════════════════════════════════ */
.hmt-empty-notice {
  text-align: center;
  padding: var(--sp-16) var(--sp-8);
  color: var(--text-muted);
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(8px);
  border: 1.5px dashed var(--border);
  border-radius: var(--r-xl);
}
.hmt-empty-notice p { font-size: var(--text-sm); margin-top: var(--sp-2); }

/* ══════════════════════════════════════════════════════════════
   TOAST NOTIFICATION
═══════════════════════════════════════════════════════════════ */
.hmt-toast {
  position: fixed;
  bottom: var(--sp-6); left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--clr-indigo-950); color: #fff;
  padding: 12px 22px; border-radius: var(--r-full);
  font-size: var(--text-sm); font-weight: 600;
  display: flex; align-items: center; gap: var(--sp-2);
  box-shadow: var(--shadow-float); z-index: 300;
  transition: transform var(--dur-slow) var(--ease), opacity var(--dur-slow);
  opacity: 0; white-space: nowrap;
  border: 1px solid rgba(255,255,255,0.08);
}
.hmt-toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
.hmt-toast--success { background: linear-gradient(135deg, #065f46, #059669); }
.hmt-toast--error   { background: linear-gradient(135deg, #991b1b, #dc2626); }

/* ══════════════════════════════════════════════════════════════
   ANIMATIONS
═══════════════════════════════════════════════════════════════ */
@keyframes cardAppear {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ══════════════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .hmt-exam-container { padding-top: var(--sp-4); }
  .hmt-nav-sidebar { position: relative; top: 0; max-height: none; }
  .hmt-qnav-grid { grid-template-columns: repeat(8, 1fr); }
  .hmt-exam-topbar-inner { padding: 0 var(--sp-4); gap: var(--sp-2); }
  .hmt-btn-nopbai { padding: 7px 14px; font-size: var(--text-xs); }
  .hmt-exam-info-box { padding: var(--sp-5); }
  .hmt-results-score { padding: var(--sp-6) var(--sp-5); }
  .hmt-results-breakdown { padding: var(--sp-5); }
  .hmt-submit-area { padding: var(--sp-5); }
  .hmt-confirm-actions { flex-direction: column; }
}
@media (max-width: 480px) {
  .hmt-qnav-grid { grid-template-columns: repeat(6, 1fr); }
  .hmt-topbar-stat { display: none; }
  .hmt-result-cards { gap: var(--sp-2); }
}