/* ─────────────────────────────────────────────────────────────
   CISSP Study Tool — styles.css
   Design: CyBird Security aesthetic (cybirdsecurity.com)
   ───────────────────────────────────────────────────────────── */

/* ── Custom Properties ─────────────────────────────────────── */
:root {
  --c-bg:          #07080f;
  --c-bg-elevated: #0d1017;
  --c-bg-card:     rgba(255, 255, 255, 0.03);
  --c-bg-card-hov: rgba(255, 255, 255, 0.06);
  --c-border:      rgba(255, 255, 255, 0.08);
  --c-border-hov:  rgba(124, 58, 237, 0.4);

  --c-purple:      #7c3aed;
  --c-purple-lt:   #a78bfa;
  --c-blue:        #2563eb;
  --c-blue-lt:     #60a5fa;
  --c-cyan:        #06b6d4;
  --c-cyan-lt:     #67e8f9;
  --c-green:       #10b981;
  --c-red:         #ef4444;
  --c-amber:       #f59e0b;

  --c-text:        #f8fafc;
  --c-text-2:      #94a3b8;
  --c-text-3:      #475569;

  --grad-primary:  linear-gradient(135deg, var(--c-purple-lt) 0%, var(--c-blue-lt) 50%, var(--c-cyan-lt) 100%);
  --grad-button:   linear-gradient(135deg, var(--c-purple) 0%, var(--c-blue) 100%);

  --font:          'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', monospace;

  --nav-h:         64px;
  --radius:        14px;
  --radius-sm:     8px;
  --radius-pill:   999px;

  --ease:          cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast:        150ms;
  --t-base:        250ms;
  --t-slow:        400ms;
}

/* ── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); -webkit-text-size-adjust: 100%; }
body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
img, svg { display: block; max-width: 100%; }

/* ── Layout Utilities ───────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
}

.grid {
  display: grid;
  gap: 24px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ── Card ────────────────────────────────────────────────────── */
.card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color var(--t-base) var(--ease), background var(--t-base);
}
.card:hover {
  border-color: var(--c-border-hov);
  background: var(--c-bg-card-hov);
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  transition: all var(--t-base) var(--ease);
  white-space: nowrap;
  user-select: none;
  cursor: pointer;
  border: none;
}
.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}
.btn-lg { padding: 14px 28px; font-size: 15px; }
.btn-sm { padding: 7px 14px; font-size: 13px; }

.btn-primary {
  background: var(--grad-button);
  color: #fff;
  box-shadow: 0 0 0 1px rgba(124,58,237,0.3), 0 4px 20px rgba(124,58,237,0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(124,58,237,0.5), 0 8px 32px rgba(124,58,237,0.35);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: rgba(96,165,250,0.1);
  color: var(--c-blue-lt);
  border: 1px solid rgba(96,165,250,0.25);
}
.btn-secondary:hover {
  background: rgba(96,165,250,0.18);
  border-color: rgba(96,165,250,0.5);
  transform: translateY(-1px);
}

.btn-ghost {
  background: rgba(255,255,255,0.05);
  color: var(--c-text-2);
  border: 1px solid var(--c-border);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.09);
  border-color: rgba(255,255,255,0.15);
  color: var(--c-text);
  transform: translateY(-1px);
}
.btn-active {
  background: rgba(124,58,237,0.15) !important;
  border-color: rgba(124,58,237,0.4) !important;
  color: var(--c-purple-lt) !important;
}

.btn-correct {
  background: rgba(16,185,129,0.12);
  color: var(--c-green);
  border: 1px solid rgba(16,185,129,0.3);
}
.btn-correct:hover {
  background: rgba(16,185,129,0.2);
  transform: translateY(-1px);
}
.btn-incorrect {
  background: rgba(239,68,68,0.1);
  color: var(--c-red);
  border: 1px solid rgba(239,68,68,0.25);
}
.btn-incorrect:hover {
  background: rgba(239,68,68,0.18);
  transform: translateY(-1px);
}

/* ── Gradient Text ───────────────────────────────────────────── */
.gradient-text {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Navbar ──────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(7,8,15,0.75);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--c-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.nav-logo-icon {
  width: 28px;
  height: 28px;
  background: var(--grad-button);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-logo-dot { color: var(--c-purple-lt); }
.nav-logo-sub {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--c-text-3);
  font-weight: 400;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 7px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--c-text-2);
  border-radius: var(--radius-sm);
  transition: all var(--t-fast);
  cursor: pointer;
}
.nav-link:hover { color: var(--c-text); background: rgba(255,255,255,0.05); }
.nav-link.active {
  color: var(--c-purple-lt);
  background: rgba(124,58,237,0.1);
}

/* ── Nav logo sub-link ──────────────────────────────────────── */
.nav-logo-sub--link {
  transition: color var(--t-fast);
}
.nav-logo-sub--link:hover {
  color: var(--c-purple-lt);
}

/* ── Other Certs dropdown ───────────────────────────────────── */
.nav-dropdown {
  position: relative;
}
.nav-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 5px;
}
.nav-dropdown-trigger svg {
  transition: transform var(--t-fast);
  flex-shrink: 0;
}
.nav-dropdown-trigger[aria-expanded="true"] svg {
  transform: rotate(180deg);
}
.nav-dropdown-menu {
  display: none;
  flex-direction: column;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 176px;
  background: var(--c-bg-elevated);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 6px;
  gap: 2px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  z-index: 200;
}
.nav-dropdown-menu.open {
  display: flex;
}
.nav-dropdown-item {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--c-text-2);
  border-radius: var(--radius-sm);
  transition: all var(--t-fast);
  white-space: nowrap;
}
.nav-dropdown-item:hover {
  color: var(--c-text);
  background: rgba(255,255,255,0.05);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-text-2);
  border-radius: 2px;
  transition: all var(--t-base);
}

/* ── Page Layout ─────────────────────────────────────────────── */
.page {
  display: none;
  min-height: calc(100vh - var(--nav-h));
  padding: 40px 0 80px;
}
.page.active { display: block; }
.page-container { max-width: 900px; margin: 0 auto; padding: 0 32px; }

/* ── Home / Hero ─────────────────────────────────────────────── */
#page-home {
  padding-top: calc(var(--nav-h) + 40px);
}
.hero-section {
  position: relative;
  overflow: hidden;
  padding: 60px 0;
}

.hero-mesh {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.mesh-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
}
.mesh-orb--purple {
  width: 600px; height: 600px;
  top: -200px; left: -100px;
  background: radial-gradient(circle, var(--c-purple) 0%, transparent 70%);
}
.mesh-orb--blue {
  width: 500px; height: 500px;
  top: -100px; right: -80px;
  background: radial-gradient(circle, var(--c-blue) 0%, transparent 70%);
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(124,58,237,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124,58,237,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 90% at 50% 50%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 90% at 50% 50%, black 40%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  padding: 0 32px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-purple-lt);
  margin-bottom: 24px;
  border: 1px solid rgba(167,139,250,0.2);
  background: rgba(124,58,237,0.08);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
}
.eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 8px var(--c-green);
  animation: pulse 2.5s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}
.hero-sub {
  font-size: 18px;
  color: var(--c-text-2);
  line-height: 1.7;
  margin-bottom: 40px;
}
.hero-ctas {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

/* Domain Cards on Home */
.home-stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}
.stat-card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  aspect-ratio: 2 / 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: all var(--t-base);
}
.stat-card:hover { border-color: var(--c-border-hov); background: var(--c-bg-card-hov); }
.stat-card-value {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-card-label {
  font-size: 13px;
  color: var(--c-text-3);
  margin-top: 4px;
  font-weight: 500;
}

.domain-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.domain-card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: all var(--t-base) var(--ease);
  position: relative;
  overflow: hidden;
}
.domain-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: var(--domain-color, var(--c-purple));
  border-radius: 2px 0 0 2px;
}
.domain-card:hover {
  border-color: var(--c-border-hov);
  background: var(--c-bg-card-hov);
  transform: translateY(-2px);
}
.domain-card-name {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  padding-left: 12px;
}
.domain-card-progress {
  padding-left: 12px;
}
.domain-card-bar-wrap {
  height: 4px;
  background: var(--c-border);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 6px;
}
.domain-card-bar {
  height: 100%;
  border-radius: 2px;
  background: var(--domain-color, var(--c-purple));
  transition: width 0.6s var(--ease);
}
.domain-card-pct {
  font-size: 12px;
  color: var(--c-text-3);
  font-family: var(--font-mono);
}

/* ── Flashcard ───────────────────────────────────────────────── */
.flashcard-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 16px;
  flex-wrap: wrap;
}
.flashcard-filters {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.flashcard-counter {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-text-3);
}
.counter-current {
  color: var(--c-purple-lt);
  font-weight: 700;
  font-size: 18px;
}

.flashcard-wrap {
  perspective: 1200px;
  height: 320px;
  cursor: pointer;
  margin-bottom: 24px;
}

.flashcard {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.55s var(--ease);
}
.flashcard.is-flipped { transform: rotateY(180deg); }

.flashcard-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 36px;
  text-align: center;
  transition: border-color var(--t-base);
}
.flashcard-face:hover { border-color: var(--c-border-hov); }

.flashcard-back { transform: rotateY(180deg); }

.flashcard-domain-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-purple-lt);
  background: rgba(124,58,237,0.08);
  border: 1px solid rgba(124,58,237,0.2);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 20px;
}

.flashcard-term {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.flashcard-hint {
  margin-top: 20px;
  font-size: 13px;
  color: var(--c-text-3);
  font-family: var(--font-mono);
}

.flashcard-definition {
  font-size: 16px;
  color: var(--c-text);
  line-height: 1.65;
  max-width: 500px;
}

.flashcard-explanation {
  margin-top: 16px;
  font-size: 13px;
  color: var(--c-text-2);
  line-height: 1.6;
  max-width: 480px;
  border-top: 1px solid var(--c-border);
  padding-top: 14px;
}

.flashcard-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
  justify-content: center;
}
.tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-cyan-lt);
  background: rgba(6,182,212,0.08);
  border: 1px solid rgba(6,182,212,0.2);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.flashcard-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 20px;
}

.flashcard-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.flashcard-stat-pill {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text-3);
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
}

/* ── Form Controls ───────────────────────────────────────────── */
.form-select {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  color: var(--c-text);
  padding: 8px 32px 8px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 14px;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  cursor: pointer;
  transition: border-color var(--t-fast);
}
.form-select:hover, .form-select:focus {
  border-color: var(--c-border-hov);
  outline: none;
}

/* ── Quiz ────────────────────────────────────────────────────── */
.quiz-setup {
  max-width: 700px;
  margin: 0 auto;
}
.quiz-setup-header { margin-bottom: 36px; }
.setup-title { font-size: 28px; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 8px; }
.setup-subtitle { color: var(--c-text-2); font-size: 15px; }
.setup-section { margin-bottom: 32px; }
.setup-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text-2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  font-family: var(--font-mono);
}
.setup-hint { font-size: 12px; color: var(--c-text-3); margin-top: 8px; }

.domain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.domain-chip {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  cursor: pointer;
  transition: all var(--t-base);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.domain-chip:hover { border-color: var(--c-border-hov); background: var(--c-bg-card-hov); }
.domain-chip.is-selected {
  border-color: var(--c-purple-lt);
  background: rgba(124,58,237,0.1);
}
.domain-chip.is-weak { border-color: rgba(239,68,68,0.3); }
.domain-chip-name { font-size: 13px; font-weight: 500; }
.domain-chip-acc {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-green);
  flex-shrink: 0;
}
.domain-chip-acc.acc--weak { color: var(--c-red); }
.weak-badge {
  font-size: 11px;
  color: var(--c-red);
  background: rgba(239,68,68,0.1);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
}

.focus-mode-card {
  background: rgba(239,68,68,0.06);
  border: 1px solid rgba(239,68,68,0.2);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.focus-mode-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-red);
  margin-bottom: 4px;
}
.focus-mode-desc { font-size: 13px; color: var(--c-text-2); }

.count-options {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.count-btn {
  width: 56px;
  height: 40px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  color: var(--c-text-2);
  transition: all var(--t-base);
}
.count-btn:hover { border-color: var(--c-border-hov); color: var(--c-text); }
.count-btn.is-selected {
  background: rgba(124,58,237,0.15);
  border-color: var(--c-purple-lt);
  color: var(--c-purple-lt);
}
.setup-actions { display: flex; gap: 12px; }

/* Quiz Active */
.quiz-progress-bar {
  height: 3px;
  background: var(--c-border);
  border-radius: 2px;
  margin-bottom: 20px;
  overflow: hidden;
}
.quiz-progress-fill {
  height: 100%;
  background: var(--grad-button);
  border-radius: 2px;
  transition: width 0.4s var(--ease);
}
.quiz-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.quiz-counter {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-text-3);
}

.quiz-question-card {
  padding: 32px;
}
.question-domain-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-purple-lt);
  background: rgba(124,58,237,0.08);
  border: 1px solid rgba(124,58,237,0.2);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  display: inline-block;
  margin-bottom: 20px;
}
.question-text {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -0.01em;
  margin-bottom: 28px;
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}
.option-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--c-border);
  color: var(--c-text);
  font-size: 15px;
  text-align: left;
  transition: all var(--t-base);
  cursor: pointer;
  width: 100%;
}
.option-btn:not([disabled]):hover {
  border-color: var(--c-purple-lt);
  background: rgba(124,58,237,0.08);
}
.option-letter {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--c-border);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--c-text-3);
}
.option-text { flex: 1; }
.option-icon { margin-left: auto; flex-shrink: 0; }

.option-correct {
  border-color: var(--c-green) !important;
  background: rgba(16,185,129,0.08) !important;
}
.option-correct .option-letter {
  border-color: var(--c-green);
  background: rgba(16,185,129,0.15);
  color: var(--c-green);
}
.option-correct .option-icon { color: var(--c-green); }

.option-wrong {
  border-color: var(--c-red) !important;
  background: rgba(239,68,68,0.08) !important;
}
.option-wrong .option-letter {
  border-color: var(--c-red);
  background: rgba(239,68,68,0.15);
  color: var(--c-red);
}
.option-wrong .option-icon { color: var(--c-red); }
.option-disabled { opacity: 0.5; cursor: default; }

.quiz-next-bar {
  display: flex;
  justify-content: flex-end;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--c-border);
}

/* Feedback */
.feedback {
  margin-top: 20px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid;
}
.feedback--correct { border-color: rgba(16,185,129,0.3); background: rgba(16,185,129,0.04); }
.feedback--incorrect { border-color: rgba(239,68,68,0.3); background: rgba(239,68,68,0.04); }

.feedback-header { padding: 14px 18px 0; }
.feedback-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
}
.feedback-badge--correct { color: var(--c-green); background: rgba(16,185,129,0.12); }
.feedback-badge--incorrect { color: var(--c-red); background: rgba(239,68,68,0.12); }

.feedback-section { padding: 14px 18px; }
.feedback-label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-text-3);
  margin-bottom: 8px;
}
.feedback-answer {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
}
.feedback-answer-icon { flex-shrink: 0; font-size: 16px; }
.feedback-answer--correct { background: rgba(16,185,129,0.1); color: var(--c-green); }
.feedback-answer--wrong { background: rgba(239,68,68,0.1); color: var(--c-red); }
.feedback-explanation { font-size: 14px; color: var(--c-text-2); line-height: 1.6; }

.feedback-deep {
  border-top: 1px solid var(--c-border);
  padding: 12px 18px;
}
.feedback-deep summary {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-cyan-lt);
  cursor: pointer;
  user-select: none;
  list-style: none;
}
.feedback-deep summary::-webkit-details-marker { display: none; }
.feedback-deep-body {
  margin-top: 12px;
  font-size: 14px;
  color: var(--c-text-2);
  line-height: 1.65;
}

/* Quiz Results */
.quiz-results { max-width: 700px; margin: 0 auto; }
.results-hero { margin-bottom: 20px; }
.results-score { display: flex; align-items: center; gap: 32px; flex-wrap: wrap; }
.score-circle {
  position: relative;
  width: 120px;
  height: 120px;
  flex-shrink: 0;
}
.score-svg { width: 120px; height: 120px; }
.score-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.score-number {
  font-size: 24px;
  font-weight: 800;
  color: var(--grade-color);
  line-height: 1;
}
.score-grade {
  font-size: 11px;
  color: var(--c-text-3);
  font-family: var(--font-mono);
  margin-top: 3px;
}
.results-stats { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-item .stat-value { font-size: 28px; font-weight: 800; }
.stat-item .stat-value.correct { color: var(--c-green); }
.stat-item .stat-value.incorrect { color: var(--c-red); }
.stat-item .stat-label { font-size: 12px; color: var(--c-text-3); }
.stat-divider { width: 1px; height: 40px; background: var(--c-border); }

.section-label {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-text-3);
  font-family: var(--font-mono);
  margin-bottom: 16px;
}
.results-breakdown, .results-incorrect { margin-bottom: 20px; }
.breakdown-row {
  display: grid;
  grid-template-columns: 200px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--c-border);
}
.breakdown-row:last-child { border-bottom: none; }
.breakdown-name { font-size: 13px; color: var(--c-text-2); }
.breakdown-bar-wrap { height: 6px; background: var(--c-border); border-radius: 3px; overflow: hidden; }
.breakdown-bar { height: 100%; border-radius: 3px; transition: width 0.6s var(--ease); }
.breakdown-score { font-family: var(--font-mono); font-size: 12px; color: var(--c-text-3); white-space: nowrap; }

.review-item { padding: 14px 0; border-bottom: 1px solid var(--c-border); }
.review-item:last-child { border-bottom: none; }
.review-q { font-size: 14px; font-weight: 500; margin-bottom: 8px; }
.review-answers { display: flex; flex-direction: column; gap: 4px; }
.review-your-answer, .review-correct-answer { font-size: 13px; color: var(--c-text-2); }
.label-wrong { color: var(--c-red); font-weight: 600; }
.label-correct { color: var(--c-green); font-weight: 600; }

.results-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

/* Quiz Review */
.quiz-review { max-width: 700px; margin: 0 auto; }
.review-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 12px;
}
.review-title { font-size: 22px; font-weight: 700; }
.review-card { margin-bottom: 20px; }
.review-number {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text-3);
  margin-bottom: 12px;
}
.review-question { font-size: 16px; font-weight: 600; margin-bottom: 20px; line-height: 1.5; }
.options-list--static .option-btn { cursor: default; }
.review-footer {
  display: flex;
  gap: 12px;
  justify-content: space-between;
  margin-top: 32px;
  flex-wrap: wrap;
}

/* ── Progress Page ───────────────────────────────────────────── */
.progress-header { margin-bottom: 36px; }
.progress-title { font-size: 28px; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 8px; }
.progress-subtitle { font-size: 15px; color: var(--c-text-2); }

.progress-section { margin-bottom: 40px; }
.progress-section-title {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-text-3);
  font-family: var(--font-mono);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.progress-section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--c-border);
}

.overall-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.overall-stat-card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: all var(--t-base);
}
.overall-stat-card:hover { border-color: var(--c-border-hov); }
.overall-stat-value {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 6px;
}
.overall-stat-label { font-size: 12px; color: var(--c-text-3); font-weight: 500; }

.domain-progress-list { display: flex; flex-direction: column; gap: 12px; }
.domain-progress-item {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  transition: all var(--t-base);
}
.domain-progress-item:hover { border-color: var(--c-border-hov); }
.domain-progress-item.is-weak { border-color: rgba(239,68,68,0.3); }
.domain-progress-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  gap: 8px;
}
.domain-progress-name { font-size: 14px; font-weight: 600; }
.domain-progress-stats { font-family: var(--font-mono); font-size: 12px; color: var(--c-text-3); }
.domain-progress-bar-wrap {
  height: 6px;
  background: var(--c-border);
  border-radius: 3px;
  overflow: hidden;
}
.domain-progress-bar {
  height: 100%;
  border-radius: 3px;
  transition: width 0.8s var(--ease);
}
.weak-tag {
  font-size: 11px;
  color: var(--c-red);
  background: rgba(239,68,68,0.1);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
}

.flashcard-progress-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.fc-stat-card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}
.fc-stat-value {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 6px;
}
.fc-stat-label { font-size: 13px; color: var(--c-text-3); }

.data-mgmt-cards { display: flex; flex-direction: column; gap: 12px; }
.data-mgmt-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  gap: 16px;
  flex-wrap: wrap;
}
.data-mgmt-info { flex: 1; }
.data-mgmt-title { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.data-mgmt-desc { font-size: 13px; color: var(--c-text-2); }
.danger-zone { border-color: rgba(239,68,68,0.2); }

/* ── Empty State ──────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--c-text-3);
  font-size: 15px;
}
.empty-state-icon { font-size: 40px; margin-bottom: 16px; }

/* ── Loading ──────────────────────────────────────────────────── */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--c-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 200;
  transition: opacity 0.4s;
}
.loading-overlay.fade-out { opacity: 0; pointer-events: none; }
.loading-spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--c-border);
  border-top-color: var(--c-purple-lt);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 20px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { font-family: var(--font-mono); font-size: 13px; color: var(--c-text-3); }

/* ── Toast ────────────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.toast {
  background: var(--c-bg-elevated);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  font-size: 14px;
  color: var(--c-text);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  animation: slideIn 0.3s var(--ease) forwards;
  max-width: 320px;
}
.toast.success { border-color: rgba(16,185,129,0.4); }
.toast.error   { border-color: rgba(239,68,68,0.4); }
@keyframes slideIn { from { transform: translateX(40px); opacity: 0; } to { transform: none; opacity: 1; } }

/* ── Page Header ──────────────────────────────────────────────── */
.page-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--c-border);
}
.page-title {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.page-subtitle { font-size: 15px; color: var(--c-text-2); }

/* ═══════════════════════════════════════════════════════════════
   INTERACTIVE QUESTIONS
   ═══════════════════════════════════════════════════════════════ */

/* ── Shared interactive base ─────────────────────────────────── */
.question-header-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.question-type-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(6,182,212,0.12);
  color: var(--c-cyan-lt);
  border: 1px solid rgba(6,182,212,0.25);
}
.question-type-badge--sm {
  font-size: 10px;
  padding: 2px 8px;
  margin-left: 6px;
  vertical-align: middle;
}

.iq-instruction {
  font-size: 13px;
  color: var(--c-text-2);
  margin-bottom: 16px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
}

.iq-submit-row {
  display: flex;
  justify-content: flex-end;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--c-border);
}

.iq-icon {
  display: inline-block;
  flex-shrink: 0;
  vertical-align: middle;
}

/* ── Setup toggle ────────────────────────────────────────────── */
.setup-toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--t-base) var(--ease), background var(--t-base);
}
.setup-toggle-row:hover {
  border-color: rgba(6,182,212,0.35);
  background: rgba(6,182,212,0.04);
}

.setup-toggle-info {
  flex: 1;
}
.setup-toggle-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 2px;
}
.setup-toggle-desc {
  font-size: 12px;
  color: var(--c-text-2);
  line-height: 1.4;
}

.toggle-switch {
  width: 42px;
  height: 24px;
  border-radius: var(--radius-pill);
  background: var(--c-border);
  border: 1px solid rgba(255,255,255,0.1);
  position: relative;
  flex-shrink: 0;
  transition: background var(--t-base) var(--ease);
}
.toggle-switch.is-on {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
}
.toggle-knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  transition: transform var(--t-base) var(--ease);
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.toggle-switch.is-on .toggle-knob {
  transform: translateX(18px);
}

.setup-interactive-link {
  display: inline-block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--c-cyan-lt);
  opacity: 0.8;
  transition: opacity var(--t-fast);
}
.setup-interactive-link:hover { opacity: 1; }

/* ── Multi-Select ────────────────────────────────────────────── */
.iq-ms-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.iq-ms-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
  background: rgba(255,255,255,0.02);
  cursor: pointer;
  transition: border-color var(--t-fast), background var(--t-fast);
  user-select: none;
}
.iq-ms-option:hover {
  border-color: rgba(124,58,237,0.4);
  background: rgba(124,58,237,0.05);
}
.iq-ms-option.is-checked {
  border-color: rgba(124,58,237,0.5);
  background: rgba(124,58,237,0.1);
}
.iq-ms-option.is-correct {
  border-color: rgba(16,185,129,0.5);
  background: rgba(16,185,129,0.08);
  cursor: default;
}
.iq-ms-option.is-wrong {
  border-color: rgba(239,68,68,0.4);
  background: rgba(239,68,68,0.07);
  cursor: default;
}

.iq-ms-checkbox {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: 2px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color var(--t-fast), background var(--t-fast);
  color: var(--c-purple-lt);
}
.is-checked .iq-ms-checkbox {
  border-color: var(--c-purple-lt);
  background: rgba(124,58,237,0.2);
}
.is-correct .iq-ms-checkbox {
  border-color: var(--c-green);
  background: rgba(16,185,129,0.2);
  color: var(--c-green);
}
.is-wrong .iq-ms-checkbox {
  border-color: var(--c-red);
  background: rgba(239,68,68,0.15);
  color: var(--c-red);
}

.iq-ms-letter {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--c-text-2);
  flex-shrink: 0;
}
.iq-ms-text {
  font-size: 14px;
  line-height: 1.45;
  flex: 1;
}

/* ── Fill-in-the-Blank ───────────────────────────────────────── */
.iq-fillblank { }

.iq-template {
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 20px;
  padding: 16px 20px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
}

.blank-slot {
  display: inline-block;
  min-width: 120px;
  padding: 2px 10px;
  border-radius: 4px;
  border-bottom: 2px solid var(--c-cyan);
  background: rgba(6,182,212,0.08);
  color: var(--c-cyan-lt);
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 14px;
  text-align: center;
  transition: all var(--t-fast);
}
.blank-filled-preview {
  background: rgba(124,58,237,0.12);
  border-bottom-color: var(--c-purple-lt);
  color: var(--c-purple-lt);
}
.blank-correct {
  background: rgba(16,185,129,0.15);
  border-bottom-color: var(--c-green);
  color: var(--c-green);
}
.blank-wrong {
  background: rgba(239,68,68,0.12);
  border-bottom-color: var(--c-red);
  color: var(--c-red);
  text-decoration: line-through;
}

.iq-fb-choices {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.iq-fb-choice {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
  background: rgba(255,255,255,0.02);
  font-size: 14px;
  color: var(--c-text);
  text-align: left;
  cursor: pointer;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.iq-fb-choice:hover:not([disabled]) {
  border-color: rgba(124,58,237,0.4);
  background: rgba(124,58,237,0.05);
}
.iq-fb-choice.is-selected {
  border-color: rgba(124,58,237,0.6);
  background: rgba(124,58,237,0.12);
  color: var(--c-purple-lt);
}
.iq-fb-choice.is-correct {
  border-color: rgba(16,185,129,0.5);
  background: rgba(16,185,129,0.1);
  color: var(--c-green);
}
.iq-fb-choice.is-wrong {
  border-color: rgba(239,68,68,0.4);
  background: rgba(239,68,68,0.08);
  color: var(--c-red);
}
.iq-fb-choice[disabled] { cursor: default; }

/* ── Ordering ────────────────────────────────────────────────── */
.iq-ordering { }

.iq-sort-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 0;
  margin: 0;
}

.iq-sort-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
  background: rgba(255,255,255,0.03);
  transition: border-color var(--t-fast), background var(--t-fast), opacity var(--t-fast);
  user-select: none;
}
.iq-sort-item[draggable="true"] { cursor: grab; }
.iq-sort-item[draggable="true"]:active { cursor: grabbing; }
.iq-sort-item.is-dragging {
  opacity: 0.4;
  border-style: dashed;
}
.iq-sort-item.drag-over {
  border-color: var(--c-purple-lt);
  background: rgba(124,58,237,0.1);
}
.iq-sort-item.is-correct {
  border-color: rgba(16,185,129,0.5);
  background: rgba(16,185,129,0.08);
}
.iq-sort-item.is-wrong {
  border-color: rgba(239,68,68,0.4);
  background: rgba(239,68,68,0.07);
}
.iq-sort-item.is-reference {
  background: rgba(255,255,255,0.02);
  border-color: var(--c-border);
  opacity: 0.8;
  cursor: default;
}

.sort-handle {
  font-size: 16px;
  color: var(--c-text-3);
  cursor: grab;
  padding: 0 4px;
  flex-shrink: 0;
}

.sort-pos {
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--c-text-3);
  min-width: 20px;
  flex-shrink: 0;
}

.sort-text {
  flex: 1;
  font-size: 14px;
  line-height: 1.4;
}

.sort-arrows {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}
.sort-up, .sort-dn {
  width: 24px;
  height: 20px;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  color: var(--c-text-2);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--c-border);
  cursor: pointer;
  transition: all var(--t-fast);
  line-height: 1;
}
.sort-up:hover:not([disabled]), .sort-dn:hover:not([disabled]) {
  background: rgba(124,58,237,0.15);
  border-color: rgba(124,58,237,0.4);
  color: var(--c-purple-lt);
}
.sort-up[disabled], .sort-dn[disabled] { opacity: 0.25; cursor: default; }

.iq-sort-list--reference {
  margin-top: 10px;
}
.iq-order-reveal {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--c-border);
}
.iq-answer-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--c-text-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

/* ── Matching ────────────────────────────────────────────────── */
.iq-matching { }

.iq-match-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}

.iq-col-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-text-3);
  margin-bottom: 10px;
}

.iq-match-items,
.iq-match-cats {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.iq-match-item {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
  background: rgba(255,255,255,0.03);
  font-size: 13px;
  cursor: pointer;
  transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast);
  line-height: 1.4;
}
.iq-match-item:hover {
  border-color: rgba(124,58,237,0.4);
  background: rgba(124,58,237,0.06);
}
.iq-match-item.is-selected {
  border-color: var(--c-cyan);
  background: rgba(6,182,212,0.1);
  color: var(--c-cyan-lt);
  transform: scale(1.01);
}
.iq-match-all-placed {
  font-size: 12px;
  color: var(--c-text-3);
  padding: 8px 0;
  text-align: center;
  font-style: italic;
}

.iq-match-cat {
  border: 1.5px dashed var(--c-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  transition: border-color var(--t-fast), background var(--t-fast);
  min-height: 60px;
}
.iq-match-cat.is-droppable {
  border-color: rgba(6,182,212,0.4);
  background: rgba(6,182,212,0.04);
  cursor: pointer;
}
.iq-match-cat.is-droppable:hover {
  border-color: var(--c-cyan);
  background: rgba(6,182,212,0.08);
}

.iq-cat-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-text-2);
  margin-bottom: 8px;
}

.iq-cat-zone {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 32px;
}

.iq-assigned-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 6px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--c-border);
  font-size: 12px;
}
.iq-assigned-item.is-correct {
  background: rgba(16,185,129,0.1);
  border-color: rgba(16,185,129,0.4);
  color: var(--c-green);
}
.iq-assigned-item.is-wrong {
  background: rgba(239,68,68,0.08);
  border-color: rgba(239,68,68,0.35);
  color: var(--c-red);
}

.iq-assigned-text { flex: 1; line-height: 1.3; }

.iq-unassign {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: var(--c-text-3);
  font-size: 14px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast);
  border: none;
}
.iq-unassign:hover {
  background: rgba(239,68,68,0.2);
  color: var(--c-red);
}

/* ── Interactive feedback panels ─────────────────────────────── */
.iq-feedback-ms {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}
.iq-fb-ms-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--c-border);
}
.iq-fb-ms-row.is-correct {
  background: rgba(16,185,129,0.08);
  border-color: rgba(16,185,129,0.3);
  color: var(--c-green);
}
.iq-fb-ms-row.is-wrong {
  background: rgba(239,68,68,0.07);
  border-color: rgba(239,68,68,0.3);
  color: var(--c-red);
}
.iq-fb-neutral {
  width: 16px;
  text-align: center;
  color: var(--c-text-3);
}

.iq-feedback-order {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 8px;
}
.iq-fo-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0;
  margin: 0;
}
.iq-fo-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  padding: 5px 8px;
  border-radius: 5px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--c-border);
  line-height: 1.35;
}
.iq-fo-item.is-correct {
  background: rgba(16,185,129,0.08);
  border-color: rgba(16,185,129,0.3);
  color: var(--c-green);
}
.iq-fo-item.is-wrong {
  background: rgba(239,68,68,0.07);
  border-color: rgba(239,68,68,0.3);
  color: var(--c-red);
}
.iq-fo-item.is-reference {
  background: rgba(255,255,255,0.02);
  color: var(--c-text-2);
}

.iq-feedback-match {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-top: 8px;
}
.iq-fm-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--c-border);
  flex-wrap: wrap;
}
.iq-fm-row.is-correct {
  background: rgba(16,185,129,0.08);
  border-color: rgba(16,185,129,0.3);
}
.iq-fm-row.is-wrong {
  background: rgba(239,68,68,0.07);
  border-color: rgba(239,68,68,0.3);
}
.iq-fm-item { font-weight: 500; color: var(--c-text); }
.iq-fm-arrow { color: var(--c-text-3); }
.iq-fm-cat { font-weight: 600; }
.iq-fm-correct {
  font-size: 11px;
  color: var(--c-green);
  margin-left: auto;
}

/* ── Review page interactive section ────────────────────────── */
.review-interactive-body {
  margin: 12px 0;
  pointer-events: none; /* answered state, no interaction */
  opacity: 0.9;
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 768px) {
  .container, .page-container { padding: 0 20px; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(7,8,15,0.96);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--c-border);
    padding: 16px 20px;
    gap: 8px;
    z-index: 99;
  }
  .nav-link { width: 100%; padding: 12px 16px; }
  .nav-dropdown-menu {
    position: static;
    border: none;
    box-shadow: none;
    background: transparent;
    padding: 4px 0 0 16px;
  }
  .nav-dropdown-menu.open { display: flex; }
  .nav-dropdown-item { padding: 10px 16px; width: 100%; }

  .home-stats { grid-template-columns: repeat(3, 1fr); }
  .domain-cards-grid { grid-template-columns: 1fr; }
  .domain-grid { grid-template-columns: 1fr; }
  .overall-stats { grid-template-columns: repeat(2, 1fr); }
  .flashcard-progress-cards { grid-template-columns: 1fr; }
  .breakdown-row { grid-template-columns: 1fr; }
  .breakdown-name { font-size: 12px; }
  .flashcard-wrap { height: 260px; }
  .flashcard-face { padding: 24px; }
  .flashcard-term { font-size: 20px; }
  .results-score { flex-direction: column; align-items: flex-start; }
  .score-circle { width: 100px; height: 100px; }
  .score-svg { width: 100px; height: 100px; }
  .iq-match-layout { grid-template-columns: 1fr; }
  .iq-feedback-order { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .home-stats { grid-template-columns: 1fr 1fr; }
  .overall-stats { grid-template-columns: 1fr 1fr; }
  .hero-ctas { flex-direction: column; align-items: center; }
  .flashcard-controls { flex-direction: column; align-items: flex-start; }
}