/* ============================================================
   MCQ PLATFORM — MAIN STYLESHEET
   ============================================================ */

/* ── RESET & TOKENS ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary:       #2563EB;
  --primary-dark:  #1d4ed8;
  --primary-light: #dbeafe;
  --success:       #10b981;
  --success-light: #d1fae5;
  --warning:       #f59e0b;
  --warning-light: #fef3c7;
  --danger:        #ef4444;
  --danger-light:  #fee2e2;
  --gold:          #EF9F27;
  --text:          #111827;
  --text-muted:    #6b7280;
  --border:        #e5e7eb;
  --bg:            #f3f4f6;
  --card:          #ffffff;
  --radius:        10px;
  --shadow:        0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.06);
  --shadow-lg:     0 4px 16px rgba(0,0,0,.12);
  --font:          'Inter', system-ui, -apple-system, sans-serif;
  --header-h:      60px;
}
html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
button { font-family: var(--font); cursor: pointer; }
input, select, textarea { font-family: var(--font); }

/* ── LAYOUT ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.main-content { min-height: calc(100vh - var(--header-h) - 120px); padding: 2rem 0 3rem; }

/* ── HEADER ── */
.site-header {
  background: #0f172a;
  height: var(--header-h);
  position: sticky; top: 0; z-index: 200;
  box-shadow: 0 2px 8px rgba(0,0,0,.25);
}
/* ── HEADER — logo left, nav right ── */
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
  padding: 0;
}

/* Logo wrapper — image + name side by side */
.logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-shrink: 0;
  order: 0;
  text-decoration: none;
  margin-left: -.25rem; /* nudge slightly left to align with content edge */
}
.logo:hover { text-decoration: none; }

/* Logo image */
.logo-img {
  height: 42px;
  width: auto;
  display: block;
  object-fit: contain;
}
.logo-img--footer {
  height: 34px;
}

/* Logo text name */
.logo-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.3px;
  line-height: 1;
  white-space: nowrap;
}
.logo-name span {
  color: #f59e0b; /* gold — matches the logo's orange/gold accent */
}
.logo-name--footer {
  font-size: 1.1rem;
  color: #e2e8f0;
}
.logo-name--footer span {
  color: #f59e0b;
}
.nav-toggle {
  display: none;
  order: 2;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-wrap: wrap;
  order: 1;
  margin-left: auto;
}
.nav-link { color: #cbd5e1; font-size: .9rem; font-weight: 500; padding: .3rem .5rem; border-radius: 6px; transition: color .15s, background .15s; }
.nav-link:hover { color: #fff; background: rgba(255,255,255,.08); text-decoration: none; }

.user-menu { display: flex; align-items: center; gap: .5rem; position: relative; }
.avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; border: 2px solid #334155; }
.avatar-placeholder { width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: .85rem; font-weight: 700; }
.user-dropdown { display: flex; flex-direction: column; }
.user-email { font-size: .78rem; color: #94a3b8; max-width: 140px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.logout-link { font-size: .78rem; color: #f87171; }
.logout-link:hover { color: #fca5a5; text-decoration: none; }

.member-pill { background: linear-gradient(135deg, #f59e0b, #d97706); color: #fff; padding: .25rem .75rem; border-radius: 20px; font-size: .78rem; font-weight: 700; }

/* Mobile nav toggle — hidden on desktop */
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; padding: .4rem; order: 2; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: #cbd5e1; border-radius: 2px; transition: transform .25s, opacity .25s; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── BUTTONS ── */
.btn-primary {
  background: var(--primary); color: #fff; border: none;
  padding: .55rem 1.4rem; border-radius: 8px; font-size: .9rem; font-weight: 600;
  display: inline-flex; align-items: center; gap: .4rem;
  transition: background .15s, transform .1s, box-shadow .15s;
  box-shadow: 0 1px 3px rgba(37,99,235,.3);
}
.btn-primary:hover { background: var(--primary-dark); color: #fff; text-decoration: none; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(37,99,235,.35); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { background: #93c5fd; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-secondary {
  background: #fff; color: var(--text); border: 1.5px solid var(--border);
  padding: .55rem 1.4rem; border-radius: 8px; font-size: .9rem; font-weight: 500;
  display: inline-flex; align-items: center; gap: .4rem;
  transition: background .15s, border-color .15s;
}
.btn-secondary:hover { background: #f9fafb; border-color: #d1d5db; text-decoration: none; }
.btn-secondary-sm { background: transparent; color: #cbd5e1; border: 1px solid #334155; padding: .3rem .8rem; border-radius: 6px; font-size: .82rem; }
.btn-secondary-sm:hover { color: #fff; border-color: #64748b; text-decoration: none; }

.btn-lg { padding: .75rem 2rem; font-size: 1rem; }
.btn-full { width: 100%; justify-content: center; }
.btn-upgrade { background: linear-gradient(135deg, #f59e0b, #d97706); color: #fff; padding: .3rem .9rem; border-radius: 20px; font-size: .82rem; font-weight: 700; border: none; }
.btn-upgrade:hover { opacity: .9; color: #fff; text-decoration: none; }
.btn-upgrade-sm { background: var(--gold); color: #fff; padding: .3rem .8rem; border-radius: 6px; font-size: .8rem; font-weight: 600; }
.btn-skip { background: transparent; border: 1px solid rgba(255,255,255,.5); color: #fff; padding: .3rem .8rem; border-radius: 6px; font-size: .85rem; }
.btn-skip:hover { background: rgba(255,255,255,.1); }

/* ── CARDS ── */
.card { background: var(--card); border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow); }

/* ── MESSAGES ── */
.messages-container { position: fixed; top: calc(var(--header-h) + .75rem); right: 1rem; z-index: 500; display: flex; flex-direction: column; gap: .5rem; max-width: 380px; transition: opacity .4s; }
.message { padding: .75rem 1rem .75rem 1.1rem; border-radius: 8px; font-size: .875rem; font-weight: 500; display: flex; align-items: flex-start; justify-content: space-between; gap: .75rem; box-shadow: var(--shadow-lg); }
.message-success { background: var(--success-light); color: #065f46; border-left: 4px solid var(--success); }
.message-error   { background: var(--danger-light);  color: #991b1b; border-left: 4px solid var(--danger); }
.message-warning { background: var(--warning-light); color: #92400e; border-left: 4px solid var(--warning); }
.message-info    { background: var(--primary-light); color: #1e40af; border-left: 4px solid var(--primary); }
.msg-close { background: none; border: none; font-size: 1.1rem; line-height: 1; opacity: .5; padding: 0; flex-shrink: 0; }
.msg-close:hover { opacity: 1; }

/* ── ALERTS ── */
.alert { padding: .85rem 1rem; border-radius: 8px; margin-bottom: 1rem; font-size: .875rem; }
.alert-warning { background: var(--warning-light); color: #92400e; border-left: 4px solid var(--warning); }
.alert-info    { background: var(--primary-light); color: #1e40af; border-left: 4px solid var(--primary); }
.alert a { font-weight: 600; }

/* ── BREADCRUMB ── */
.breadcrumb { font-size: .82rem; color: var(--text-muted); margin-bottom: 1.25rem; display: flex; align-items: center; gap: .4rem; flex-wrap: wrap; }
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { text-decoration: underline; }

/* ── FOOTER ── */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 2.75rem 0 1.5rem;
  margin-top: 3rem;
  overflow-x: hidden;
}
.site-footer .container {
  overflow-x: hidden;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2rem 2.25rem;
  align-items: start;
}
.footer-col--brand { min-width: 0; }
.footer-tagline {
  font-size: .95rem;
  font-weight: 600;
  color: #cbd5e1;
  margin-top: .85rem;
}
.footer-desc {
  font-size: .85rem;
  color: #94a3b8;
  line-height: 1.65;
  margin-top: .45rem;
  max-width: 320px;
}
.footer-col-title {
  font-size: .95rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 0 0 1rem;
  letter-spacing: .02em;
  padding-bottom: .45rem;
  border-bottom: 1px solid rgba(148,163,184,.18);
}
.footer-col-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: .55rem;
}
.footer-col-list li { margin: 0; }
.footer-col-list a {
  color: #94a3b8;
  font-size: .88rem;
  text-decoration: none;
  line-height: 1.5;
  display: inline-block;
  transition: color .15s ease, transform .15s ease;
  word-break: normal;
  overflow-wrap: anywhere;
  hyphens: auto;
}
.footer-col-list a:hover {
  color: #fff;
  transform: translateX(2px);
}
.footer-bottom {
  margin-top: 2.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(148,163,184,.15);
  display: flex;
  flex-direction: column;
  gap: .3rem;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.footer-copy {
  font-size: .82rem;
  color: #cbd5e1;
  margin: 0;
}
.footer-made {
  font-size: .78rem;
  color: #94a3b8;
  margin: 0;
  line-height: 1.5;
}

/* ── EMPTY STATE ── */
.empty-state { color: var(--text-muted); font-size: .9rem; text-align: center; padding: 2rem 1rem; }

/* ── HOME PAGE ── */
.hero { text-align: center; padding: 3.5rem 1rem 2.5rem; }
.hero {
  position: relative;
  border-radius: 18px;
  background: radial-gradient(1200px 500px at 50% -10%, rgba(37,99,235,.25), transparent 60%),
              radial-gradient(900px 420px at 10% 10%, rgba(16,185,129,.18), transparent 55%),
              radial-gradient(900px 420px at 90% 10%, rgba(245,158,11,.15), transparent 55%);
}
.hero h1 { font-size: 2.4rem; font-weight: 800; color: var(--text); margin-bottom: .75rem; line-height: 1.2; }
.hero h1 span { color: var(--primary); }
.hero p { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 1.75rem; max-width: 520px; margin-left: auto; margin-right: auto; }
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.filter-bar { margin-bottom: 2rem; }
.filter-bar h2 { font-size: 1.1rem; font-weight: 700; margin-bottom: .5rem; }
.filter-subtitle { margin: 0 0 1.1rem; color: var(--text-muted); font-size: .92rem; }
.filter-row {
  display: grid;
  grid-template-columns: 2fr 2fr 2fr 1.2fr auto;
  gap: .75rem;
  align-items: end;
}
.filter-group { display: flex; flex-direction: column; gap: .35rem; }
.filter-group label {
  font-size: .72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.filter-group select {
  padding: .6rem .85rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: .9rem;
  background: #fff;
  color: var(--text);
  transition: border-color .15s, box-shadow .15s;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .75rem center;
  padding-right: 2.2rem;
  width: 100%;
}
.filter-group select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.12); }
.filter-help { margin-top: .75rem; font-size: .85rem; color: var(--text-muted); }

/* Better disabled affordance (buttons + selects) */
button:disabled { opacity: .65; cursor: not-allowed; transform: none !important; }
select:disabled { opacity: .65; cursor: not-allowed; }

.courses-section { margin-top: 1rem; }
.courses-section h2 { font-size: 1.3rem; font-weight: 700; margin-bottom: 1.25rem; }
.courses-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 1rem; }
.course-card {
  background: var(--card); border-radius: var(--radius); padding: 1.5rem 1.25rem;
  text-align: center; box-shadow: var(--shadow); display: block; color: var(--text);
  border: 1.5px solid transparent;
  transition: transform .15s, box-shadow .15s, border-color .15s;
}
.course-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); text-decoration: none; }
.course-icon { width: 52px; height: 52px; object-fit: contain; margin: 0 auto .85rem; }
.course-icon-placeholder { font-size: 2.5rem; margin-bottom: .85rem; }
.course-card h3 { font-size: .95rem; font-weight: 700; margin-bottom: .3rem; }
.topic-count { font-size: .78rem; color: var(--text-muted); background: var(--bg); padding: .15rem .6rem; border-radius: 20px; }

/* ── COURSE / TOPIC / SUBTOPIC PAGES ── */
.page-header { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.75rem; }
.page-header h1 { font-size: 1.6rem; font-weight: 800; }
.course-icon-lg { width: 44px; height: 44px; object-fit: contain; }
.subtitle { color: var(--text-muted); margin-bottom: 1.5rem; font-size: .95rem; }

.topics-list { display: flex; flex-direction: column; gap: 1rem; }
.topic-card { background: var(--card); border-radius: var(--radius); padding: 1.25rem 1.5rem; box-shadow: var(--shadow); border-left: 4px solid var(--primary-light); transition: border-color .15s; }
.topic-card:hover { border-left-color: var(--primary); }
.topic-card > a { color: var(--text); display: flex; align-items: center; justify-content: space-between; margin-bottom: .75rem; }
.topic-card > a:hover { text-decoration: none; }
.topic-card h2 { font-size: 1.05rem; font-weight: 700; }
.subtopic-count { font-size: .78rem; color: var(--text-muted); background: var(--bg); padding: .2rem .65rem; border-radius: 20px; white-space: nowrap; }
.subtopics-preview { display: flex; flex-wrap: wrap; gap: .4rem; }
.subtopic-chip { background: var(--primary-light); color: var(--primary); padding: .25rem .75rem; border-radius: 20px; font-size: .78rem; font-weight: 500; transition: background .15s; }
.subtopic-chip:hover { background: #bfdbfe; text-decoration: none; }
.subtopic-chip.more { background: var(--bg); color: var(--text-muted); }

.subtopics-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(175px, 1fr)); gap: 1rem; }
.subtopic-card { background: var(--card); border-radius: var(--radius); padding: 1.1rem 1.25rem; box-shadow: var(--shadow); display: block; color: var(--text); border: 1.5px solid transparent; transition: transform .15s, border-color .15s; }
.subtopic-card:hover { transform: translateY(-2px); border-color: var(--primary-light); text-decoration: none; }
.subtopic-card h3 { font-size: .9rem; font-weight: 600; margin-bottom: .3rem; }
.q-count { font-size: .75rem; color: var(--text-muted); }

.subtopic-hero { text-align: center; padding: 3rem 2rem; }
.subtopic-hero h1 { font-size: 1.8rem; margin-bottom: .5rem; }
.subtopic-hero p { color: var(--text-muted); margin-bottom: 1.75rem; }

/* ── QUIZ START ── */
.start-quiz-card { max-width: 640px; margin: 0 auto; }
.start-quiz-card h1 { font-size: 1.6rem; font-weight: 800; margin-bottom: .75rem; }
.quiz-meta { display: flex; justify-content: center; gap: 1.25rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.meta-item { font-size: .875rem; color: var(--text-muted); display: flex; align-items: center; gap: .3rem; }
.member-badge { color: var(--gold); font-weight: 700; }

.level-access-grid { display: flex; gap: .6rem; justify-content: center; margin: 1.25rem 0 1.5rem; flex-wrap: wrap; }
.level-tile { width: 88px; padding: .85rem .5rem; border-radius: 10px; text-align: center; background: #f8fafc; border: 2px solid var(--border); transition: transform .15s, border-color .15s; }
.level-tile.level-current { border-color: var(--primary); background: var(--primary-light); transform: scale(1.07); box-shadow: 0 4px 12px rgba(37,99,235,.2); }
.level-tile.level-locked { opacity: .65; }
.level-num { font-size: 1.15rem; font-weight: 800; color: var(--text); margin-bottom: .35rem; }
.level-label { font-size: .65rem; color: var(--text-muted); margin-bottom: .3rem; }
.level-badge { font-size: .62rem; font-weight: 700; padding: 2px 7px; border-radius: 8px; white-space: nowrap; display: inline-block; }
.badge-active { background: var(--primary); color: #fff; }
.badge-free   { background: var(--success); color: #fff; }
.badge-locked { background: var(--gold); color: #fff; }

.quiz-options { margin-bottom: 1.25rem; }
.toggle-label { display: flex; align-items: center; gap: .6rem; cursor: pointer; font-size: .9rem; justify-content: center; padding: .75rem 1rem; background: var(--bg); border-radius: 8px; border: 1.5px solid var(--border); transition: border-color .15s; }
.toggle-label:hover { border-color: var(--primary); }
.toggle-label input { width: 16px; height: 16px; accent-color: var(--primary); }
.member-notice { background: var(--warning-light); border-radius: 8px; padding: .85rem 1rem; margin-bottom: 1.25rem; font-size: .875rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

/* Limit reached */
.limit-card { max-width: 460px; margin: 3rem auto; text-align: center; }
.limit-icon { font-size: 3.5rem; margin-bottom: 1rem; }
.limit-card h1 { margin-bottom: .75rem; }
.limit-card p { color: var(--text-muted); margin-bottom: .5rem; }
.limit-actions { display: flex; gap: 1rem; justify-content: center; margin-top: 1.75rem; flex-wrap: wrap; }

/* ── QUIZ SESSION ── */
.quiz-topbar { display: flex; justify-content: space-between; align-items: center; background: var(--card); padding: .75rem 1.25rem; border-radius: var(--radius); margin-bottom: 1rem; box-shadow: var(--shadow); }
.quiz-info { display: flex; align-items: center; gap: .75rem; }
.quiz-title { font-weight: 700; font-size: 1rem; }
.quiz-level { font-size: .78rem; color: #fff; background: var(--primary); padding: .2rem .65rem; border-radius: 20px; font-weight: 600; }
.timer-wrapper { display: flex; align-items: center; gap: .5rem; background: #fef2f2; padding: .4rem .85rem; border-radius: 8px; border: 1px solid #fecaca; }
.timer-label { font-size: .78rem; color: var(--danger); font-weight: 600; }
.timer-display { font-size: 1.15rem; font-weight: 800; color: var(--danger); font-variant-numeric: tabular-nums; min-width: 48px; }
.timer-display.warning { animation: pulse 1s infinite; }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:.5; } }

.question-navigator { display: flex; flex-wrap: wrap; gap: .35rem; margin-bottom: 1.25rem; padding: .75rem 1rem; background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); overflow-x: auto; }
.question-navigator {
  position: sticky;
  top: calc(var(--header-h) + .75rem);
  z-index: 50;
}
.q-pill { width: 30px; height: 30px; border-radius: 50%; background: var(--bg); color: var(--text-muted); display: flex; align-items: center; justify-content: center; font-size: .72rem; font-weight: 600; cursor: pointer; transition: background .15s, color .15s; flex-shrink: 0; border: 1.5px solid var(--border); text-decoration: none; }
.q-pill:hover { background: var(--primary-light); color: var(--primary); text-decoration: none; }
.q-pill.answered { background: var(--success); color: #fff; border-color: var(--success); }
.q-pill.current { background: var(--primary); color: #fff; border-color: var(--primary); }

.quiz-layout { display: grid; grid-template-columns: 210px 1fr 210px; gap: 1.25rem; }
.quiz-sidebar-left, .quiz-sidebar-right { display: flex; flex-direction: column; gap: 1rem; }
.sidebar-topics { background: var(--card); border-radius: var(--radius); padding: 1rem; box-shadow: var(--shadow); }
.sidebar-topics h4 { font-size: .75rem; color: var(--text-muted); margin-bottom: .75rem; text-transform: uppercase; letter-spacing: .06em; font-weight: 600; }
.sidebar-topic-link { display: block; padding: .4rem .6rem; border-radius: 6px; font-size: .85rem; color: var(--text); margin-bottom: .2rem; transition: background .12s; }
.sidebar-topic-link:hover { background: var(--bg); text-decoration: none; }
.sidebar-topic-link.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }

.closing-ad-slot { margin: 1rem 0; }

.question-block { background: var(--card); border-radius: var(--radius); padding: 1.35rem 1.5rem; margin-bottom: .85rem; box-shadow: var(--shadow); border: 1.5px solid transparent; transition: border-color .15s; }
.question-block:target { border-color: var(--primary); }
.question-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: .85rem; }
.q-number { font-weight: 700; color: var(--primary); font-size: .9rem; }
.q-correct-pct { font-size: .75rem; color: var(--text-muted); background: var(--bg); padding: .2rem .65rem; border-radius: 20px; }
.question-body p { font-size: 1rem; line-height: 1.75; }
.question-img { border-radius: 8px; margin-top: .75rem; max-height: 280px; object-fit: contain; border: 1px solid var(--border); }

.options-list { display: flex; flex-direction: column; gap: .5rem; margin-top: 1rem; }
.option-label { display: flex; align-items: flex-start; gap: .85rem; padding: .85rem 1rem; border: 1.5px solid var(--border); border-radius: 8px; cursor: pointer; transition: border-color .15s, background .15s; }
.option-label:hover { border-color: var(--primary); background: #f0f7ff; }
.option-label.selected { border-color: var(--primary); background: var(--primary-light); }
.option-label input[type="radio"] { margin-top: .2rem; flex-shrink: 0; accent-color: var(--primary); width: 16px; height: 16px; }
.option-key { font-weight: 700; color: var(--primary); min-width: 22px; font-size: .9rem; }
.option-text { flex: 1; font-size: .95rem; line-height: 1.5; }
.option-img { width: 80px; height: 60px; object-fit: contain; border-radius: 4px; border: 1px solid var(--border); }

.quiz-pagination { display: flex; justify-content: space-between; align-items: center; padding: 1.25rem 0 .5rem; gap: 1rem; }
.quiz-pagination .btn-primary, .quiz-pagination .btn-secondary { min-width: 120px; justify-content: center; }

/* ── MODAL / INTERSTITIAL ── */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.55); display: flex; align-items: center; justify-content: center; z-index: 400; backdrop-filter: blur(2px); }
.modal-box { background: var(--card); border-radius: 14px; padding: 2rem; max-width: 420px; width: 90%; text-align: center; box-shadow: var(--shadow-lg); }
.modal-box h3 { font-size: 1.2rem; margin-bottom: .5rem; }
.modal-box p { color: var(--text-muted); margin-bottom: 1.5rem; }
.modal-box form { display: flex; gap: .75rem; justify-content: center; flex-wrap: wrap; }
.interstitial-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.8); display: flex; flex-direction: column; align-items: center; justify-content: center; z-index: 500; padding: 2rem; backdrop-filter: blur(4px); }
.interstitial-inner { background: var(--card); border-radius: 14px; padding: 1.5rem; max-width: 400px; width: 100%; text-align: center; }
.interstitial-footer { color: rgba(255,255,255,.8); margin-top: 1rem; font-size: .875rem; display: flex; align-items: center; gap: .75rem; }

/* ── QUIZ RESULTS ── */
.results-header { text-align: center; }
.results-header h1 { font-size: 1.75rem; font-weight: 800; margin-bottom: .25rem; }
.results-subtitle { color: var(--text-muted); margin-bottom: 1.75rem; }
.score-summary { display: flex; align-items: center; justify-content: center; gap: 2.5rem; flex-wrap: wrap; margin-bottom: 1.75rem; }
.score-big { display: flex; align-items: baseline; gap: .2rem; }
.score-value { font-size: 4rem; font-weight: 800; color: var(--primary); line-height: 1; }
.score-max { font-size: 1.5rem; color: #9ca3af; }
.score-stats { display: flex; gap: .75rem; flex-wrap: wrap; justify-content: center; }
.stat { font-size: .85rem; padding: .4rem .9rem; border-radius: 20px; font-weight: 600; }
.stat.correct   { background: var(--success-light); color: #065f46; }
.stat.incorrect { background: var(--danger-light);  color: #991b1b; }
.stat.skipped   { background: var(--warning-light); color: #92400e; }
.stat.time      { background: var(--bg); color: var(--text-muted); }

.level-progress { margin: 1.5rem 0; background: var(--bg); border-radius: 10px; padding: 1rem 1.25rem; }
.level-info { display: flex; justify-content: space-between; font-size: .85rem; color: var(--text-muted); margin-bottom: .5rem; font-weight: 500; }
.progress-bar { height: 10px; background: #e5e7eb; border-radius: 5px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--success)); border-radius: 5px; transition: width .8s cubic-bezier(.4,0,.2,1); }
.progress-hint { font-size: .78rem; color: var(--text-muted); margin-top: .4rem; text-align: right; }
.results-actions { display: flex; gap: .75rem; justify-content: center; margin-top: 1.75rem; flex-wrap: wrap; }

.answers-review { margin-top: 2rem; }
.answers-review h2 { font-size: 1.2rem; font-weight: 700; margin-bottom: 1.25rem; }
.answer-block { background: var(--card); border-radius: var(--radius); padding: 1.25rem 1.5rem; margin-bottom: .85rem; border-left: 4px solid var(--border); box-shadow: var(--shadow); }
.answer-block.correct   { border-left-color: var(--success); }
.answer-block.incorrect { border-left-color: var(--danger); }
.answer-block.skipped   { border-left-color: var(--warning); }
.answer-header { display: flex; gap: .85rem; align-items: center; margin-bottom: .85rem; flex-wrap: wrap; }
.q-num { font-weight: 700; color: var(--primary); font-size: .9rem; }
.q-status { font-size: .85rem; font-weight: 600; }
.q-stat { font-size: .75rem; color: var(--text-muted); margin-left: auto; background: var(--bg); padding: .2rem .65rem; border-radius: 20px; }
.q-body { margin-bottom: .85rem; line-height: 1.7; font-size: .95rem; }
.options-review { display: flex; flex-direction: column; gap: .4rem; margin-bottom: .85rem; }
.option-review { display: flex; align-items: center; gap: .75rem; padding: .65rem .9rem; border-radius: 8px; background: var(--bg); border: 1.5px solid var(--border); font-size: .9rem; }
.option-review.option-correct { background: var(--success-light); border-color: var(--success); }
.option-review.option-wrong   { background: var(--danger-light);  border-color: var(--danger); }
.badge-correct { margin-left: auto; font-size: .72rem; color: #065f46; font-weight: 700; background: #a7f3d0; padding: .15rem .5rem; border-radius: 4px; }
.badge-wrong   { margin-left: auto; font-size: .72rem; color: #991b1b; font-weight: 700; background: #fecaca; padding: .15rem .5rem; border-radius: 4px; }
.option-img-sm { width: 56px; height: 42px; object-fit: contain; border-radius: 4px; }
.explanation { background: #eff6ff; border-radius: 8px; padding: .85rem 1rem; font-size: .875rem; color: #1e40af; border-left: 3px solid var(--primary); line-height: 1.6; }
.explanation strong { color: var(--primary); }

/* ── LEGACY FEEDBACK (kept for any older templates) ── */
.option-label.option-feedback-correct { border-color: var(--success) !important; background: var(--success-light) !important; cursor: default; }
.option-label.option-feedback-wrong   { border-color: var(--danger)  !important; background: var(--danger-light)  !important; cursor: default; }
.question-answered .option-label:hover { border-color: var(--border); background: transparent; }
.instant-feedback { margin-top: 1rem; border-radius: 10px; overflow: hidden; opacity: 0; transform: translateY(-6px); transition: opacity .3s ease, transform .3s ease; }
.instant-feedback.feedback-visible, .question-answered .instant-feedback { opacity: 1; transform: translateY(0); }
.feedback-verdict { display: flex; align-items: center; gap: .6rem; padding: .7rem 1rem; font-weight: 700; font-size: .95rem; border-radius: 8px 8px 0 0; }
.feedback-verdict.feedback-correct { background: var(--success-light); color: #065f46; border: 1.5px solid var(--success); border-bottom: none; }
.feedback-verdict.feedback-incorrect { background: var(--danger-light); color: #991b1b; border: 1.5px solid var(--danger); border-bottom: none; }
.feedback-icon { font-size: 1.1rem; }
.feedback-explanation { background: #eff6ff; padding: .85rem 1rem; font-size: .875rem; color: #1e40af; border-left: 3px solid var(--primary); border-radius: 0 0 8px 8px; line-height: 1.6; }
.feedback-explanation strong { color: var(--primary); }
.q-pill.q-pill-wrong { background: var(--danger); color: #fff; border-color: var(--danger); }

/* ════════════════════════════════════════════════════════════
   REDESIGNED QUIZ SESSION (qs-*)
   ════════════════════════════════════════════════════════════ */

.qs-wrap { max-width: 1240px; margin: 0 auto; padding: 0 1rem 3rem; }

/* ── STICKY HEADER ── */
.qs-header {
  position: sticky; top: var(--header-h); z-index: 100;
  background: #fff; border-bottom: 1px solid var(--border);
  padding: .6rem 1rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  box-shadow: 0 2px 6px rgba(0,0,0,.07);
}
.qs-header-left  { display: flex; align-items: center; gap: .65rem; min-width: 0; }
.qs-header-right { display: flex; align-items: center; gap: .75rem; flex-shrink: 0; }
.qs-back { font-size: 1.1rem; font-weight: 700; color: var(--text-muted); padding: .2rem .5rem; border-radius: 6px; border: 1.5px solid var(--border); text-decoration: none; line-height: 1; transition: color .15s, border-color .15s; }
.qs-back:hover { color: var(--primary); border-color: var(--primary); text-decoration: none; }
.qs-title { font-size: .9rem; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 180px; }
.qs-level-badge { font-size: .7rem; font-weight: 700; background: var(--primary); color: #fff; padding: .15rem .55rem; border-radius: 20px; white-space: nowrap; flex-shrink: 0; }
.qs-progress-wrap { display: flex; align-items: center; gap: .6rem; }
.qs-progress-bar { width: 100px; height: 6px; background: var(--bg); border-radius: 3px; overflow: hidden; }
.qs-progress-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--success)); border-radius: 3px; transition: width .4s; }
.qs-progress-label { font-size: .78rem; font-weight: 600; color: var(--text-muted); white-space: nowrap; }
.qs-timer { display: flex; align-items: center; gap: .35rem; background: #fef2f2; border: 1px solid #fecaca; padding: .28rem .65rem; border-radius: 8px; font-size: .85rem; font-weight: 700; color: var(--danger); font-variant-numeric: tabular-nums; }
.qs-timer-val { min-width: 40px; }
.qs-timer.qs-timer-warn { animation: pulse 1s infinite; }
.qs-map-btn { display: inline-flex; align-items: center; gap: .35rem; background: var(--bg); border: 1.5px solid var(--border); color: var(--text); padding: .28rem .75rem; border-radius: 8px; font-size: .8rem; font-weight: 600; cursor: pointer; transition: border-color .15s, background .15s; }
.qs-map-btn:hover { border-color: var(--primary); background: var(--primary-light); color: var(--primary); }

/* ── MAP PANEL — uses hidden attribute, no sticky, no z-index traps ── */
.qs-map-panel { background: #fff; border: 1.5px solid var(--border); border-radius: 10px; padding: .85rem 1rem 1rem; margin: .5rem 0; box-shadow: 0 4px 12px rgba(0,0,0,.08); }
.qs-map-legend { display: flex; gap: 1.25rem; margin-bottom: .65rem; font-size: .75rem; color: var(--text-muted); font-weight: 500; flex-wrap: wrap; }
.qs-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: .3rem; vertical-align: middle; }
.dot-blank { background: var(--bg); border: 1.5px solid var(--border); }
.dot-ok    { background: var(--success); }
.dot-bad   { background: var(--danger); }
.qs-map-pills { display: flex; flex-wrap: wrap; gap: .35rem; }

/* ── GRID ── */
.qs-grid { display: grid; grid-template-columns: 190px 1fr 190px; gap: 1.25rem; margin-top: .85rem; }
.qs-sidebar { display: flex; flex-direction: column; gap: 1rem; }
.qs-sidebar-box { background: var(--card); border-radius: var(--radius); padding: 1rem; box-shadow: var(--shadow); }
.qs-sidebar-title { font-size: .7rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: .07em; margin-bottom: .65rem; }
.qs-sidebar-link { display: block; padding: .35rem .6rem; border-radius: 6px; font-size: .82rem; color: var(--text); margin-bottom: .15rem; transition: background .12s; }
.qs-sidebar-link:hover { background: var(--bg); text-decoration: none; }
.qs-sidebar-link.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }

/* ── QUESTION CARD ── */
.qs-card { background: var(--card); border-radius: 12px; padding: 1.4rem 1.6rem; margin-bottom: 1rem; border: 1.5px solid var(--border); box-shadow: 0 1px 4px rgba(0,0,0,.05), 0 4px 12px rgba(0,0,0,.04); scroll-margin-top: calc(var(--header-h) + 70px); }
.qs-card:target { border-color: var(--primary); }
.qs-q-header { display: flex; align-items: center; gap: .7rem; margin-bottom: 1rem; }
.qs-q-num { width: 30px; height: 30px; border-radius: 50%; background: var(--primary-light); color: var(--primary); font-size: .8rem; font-weight: 800; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.qs-q-meta { flex: 1; }
.qs-chip { display: inline-flex; align-items: center; font-size: .72rem; font-weight: 700; padding: .2rem .6rem; border-radius: 20px; }
.chip-ok  { background: var(--success-light); color: #065f46; }
.chip-bad { background: var(--danger-light);  color: #991b1b; }
.qs-q-stat { font-size: .72rem; color: var(--text-muted); background: var(--bg); padding: .18rem .65rem; border-radius: 20px; white-space: nowrap; flex-shrink: 0; }
.qs-q-body { margin-bottom: 1.1rem; }
.qs-q-body p { font-size: 1rem; line-height: 1.8; font-weight: 500; }
.qs-formula { margin: .75rem 0; padding: .85rem 1rem; border-radius: 8px; background: #f8fafc; border: 1px solid var(--border); font-size: 1.1em; text-align: center; }
.qs-latex   { margin: .75rem 0; font-size: 1.05em; text-align: center; }
.qs-img     { border-radius: 8px; margin-top: .75rem; max-height: 280px; object-fit: contain; border: 1px solid var(--border); }

/* ── OPTIONS ── */
.qs-opts { display: flex; flex-direction: column; gap: .45rem; }
/* Base option — no position:relative, no transform, no pointer-events tricks */
.qs-opt { display: flex; align-items: center; gap: .85rem; padding: .85rem 1rem; border: 1.5px solid var(--border); border-radius: 10px; }
.qs-opt.opt-available { cursor: pointer; transition: border-color .12s, background .12s; }
.qs-opt.opt-available:hover { border-color: var(--primary); background: #f0f7ff; }
.qs-opt.opt-selected { border-color: var(--primary); background: var(--primary-light); cursor: pointer; }
.qs-opt.opt-correct { border-color: var(--success); background: var(--success-light); cursor: default; }
.qs-opt.opt-wrong { border-color: var(--danger); background: var(--danger-light); cursor: default; }
.qs-opt.opt-neutral-answered { opacity: .6; cursor: default; }
.qs-opt-key { width: 28px; height: 28px; border-radius: 50%; border: 2px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: .78rem; font-weight: 800; color: var(--text-muted); flex-shrink: 0; transition: border-color .12s, background .12s, color .12s; }
.opt-available:hover .qs-opt-key { border-color: var(--primary); color: var(--primary); }
.opt-selected .qs-opt-key { background: var(--primary); border-color: var(--primary); color: #fff; }
.opt-correct  .qs-opt-key { background: var(--success); border-color: var(--success); color: #fff; }
.opt-wrong    .qs-opt-key { background: var(--danger);  border-color: var(--danger);  color: #fff; }
.qs-opt-text { flex: 1; font-size: .95rem; line-height: 1.55; }
.qs-opt-img  { width: 80px; height: 60px; object-fit: contain; border-radius: 4px; border: 1px solid var(--border); }
.qs-opt-tag { margin-left: auto; flex-shrink: 0; font-size: .7rem; font-weight: 700; padding: .18rem .5rem; border-radius: 6px; }
.tag-correct { background: #a7f3d0; color: #065f46; }
.tag-wrong   { background: #fecaca; color: #991b1b; }

/* ── FEEDBACK ── */
.qs-feedback { margin-top: .9rem; border-radius: 10px; overflow: hidden; }
.qs-fb-verdict { display: flex; align-items: center; gap: .5rem; padding: .75rem 1rem; font-size: .9rem; font-weight: 600; border-radius: 10px 10px 0 0; }
.fb-ok  { background: var(--success-light); color: #065f46; border: 1.5px solid var(--success); border-bottom: none; }
.fb-bad { background: var(--danger-light);  color: #991b1b; border: 1.5px solid var(--danger);  border-bottom: none; }
.qs-fb-expl { background: #eff6ff; border: 1.5px solid #bfdbfe; border-top: none; border-radius: 0 0 10px 10px; padding: .8rem 1rem; font-size: .875rem; color: #1e40af; line-height: 1.65; }

/* ── PAGINATION ── */
.qs-pager { display: flex; justify-content: space-between; align-items: center; padding: 1.1rem 0 .5rem; gap: 1rem; }
.qs-btn-sec { display: inline-flex; align-items: center; gap: .4rem; padding: .55rem 1.25rem; border-radius: 9px; font-size: .9rem; font-weight: 600; border: 1.5px solid var(--border); background: #fff; color: var(--text); text-decoration: none; transition: border-color .12s, background .12s; }
.qs-btn-sec:hover { border-color: var(--primary); background: var(--primary-light); color: var(--primary); text-decoration: none; }
.qs-btn-pri { display: inline-flex; align-items: center; gap: .4rem; padding: .55rem 1.25rem; border-radius: 9px; font-size: .9rem; font-weight: 600; background: var(--primary); border: 1.5px solid var(--primary); color: #fff; text-decoration: none; box-shadow: 0 2px 8px rgba(37,99,235,.25); transition: background .12s; }
.qs-btn-pri:hover { background: var(--primary-dark); color: #fff; text-decoration: none; }
.qs-pager-info { font-size: .85rem; color: var(--text-muted); }
.qs-btn-submit { display: inline-flex; align-items: center; gap: .45rem; padding: .6rem 1.5rem; border-radius: 9px; font-size: .95rem; font-weight: 700; background: var(--success); border: none; color: #fff; cursor: pointer; box-shadow: 0 2px 8px rgba(16,185,129,.3); transition: background .12s; }
.qs-btn-submit:hover { background: #059669; }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .qs-grid { grid-template-columns: 1fr; }
  .qs-sidebar, .qs-sidebar-right { display: none; }
}
@media (max-width: 600px) {
  .qs-title { max-width: 110px; }
  .qs-progress-bar { width: 60px; }
  .qs-card { padding: 1rem .9rem; }
  .qs-btn-sec, .qs-btn-pri, .qs-btn-submit { padding: .5rem .9rem; font-size: .85rem; }
}
/* ── END QUIZ SESSION ── */

/* ── ANALYTICS DASHBOARD ── */
.dashboard-header { margin-bottom: 1.75rem; }
.dashboard-header h1 { font-size: 1.6rem; font-weight: 800; }
.dashboard-header p { color: var(--text-muted); margin-top: .25rem; }
.dashboard-layout { display: grid; grid-template-columns: 240px 1fr 280px; gap: 1.25rem; }
.dash-sidebar-left, .dash-sidebar-right { display: flex; flex-direction: column; gap: 1rem; }
.card-title { font-size: 1rem; font-weight: 700; margin-bottom: .25rem; }
.card-subtitle { font-size: .78rem; color: var(--text-muted); margin-bottom: 1rem; }
.freq-item { padding: .55rem 0; border-bottom: 1px solid var(--bg); }
.freq-item:last-child { border-bottom: none; }
.freq-name { font-size: .875rem; font-weight: 500; margin-bottom: .2rem; }
.freq-meta { display: flex; gap: 1rem; font-size: .75rem; color: var(--text-muted); }
.coming-soon { text-align: center; padding: 2.5rem; }
.coming-soon h3 { margin-bottom: .5rem; font-size: 1rem; }
.coming-soon-label { color: var(--text-muted); font-size: .82rem; background: var(--bg); display: inline-block; padding: .25rem .75rem; border-radius: 20px; margin-top: .5rem; }
.donut-card { text-align: center; }
.donut-card h3 { margin-bottom: 1rem; font-size: 1rem; font-weight: 700; }
.weak-areas h3 { margin-bottom: .75rem; font-size: .95rem; font-weight: 700; }
.weak-item { display: flex; justify-content: space-between; padding: .4rem 0; border-bottom: 1px solid var(--bg); font-size: .875rem; }
.weak-item:last-child { border-bottom: none; }
.weak-pct { color: var(--danger); font-weight: 700; }

/* Blur overlay */
.dashboard-blur-wrapper { position: relative; min-height: 400px; }
.dashboard-blur-content { filter: blur(7px); pointer-events: none; user-select: none; }
.blur-placeholder-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.blur-card { background: #e5e7eb; border-radius: var(--radius); height: 130px; }
.blur-card.tall { height: 260px; }
.blur-overlay { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }
.blur-cta { text-align: center; background: var(--card); padding: 2.5rem 2rem; border-radius: 16px; box-shadow: var(--shadow-lg); max-width: 380px; border: 1.5px solid var(--primary-light); }
.lock-icon { font-size: 2.75rem; margin-bottom: .75rem; }
.blur-cta h2 { font-size: 1.3rem; font-weight: 800; margin-bottom: .5rem; }
.blur-cta p { color: var(--text-muted); margin-bottom: 1.5rem; font-size: .9rem; }

/* ── COMMON UI HELPERS ── */
.page-subtitle { color: var(--text-muted); margin-top: .3rem; font-size: .95rem; }
.section-heading { font-size: 1.15rem; font-weight: 800; margin: 1.75rem 0 1rem; }

.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: .75rem; }
.card-head h2 { font-size: 1.1rem; font-weight: 800; }
.card-head .card-meta { font-size: .82rem; color: var(--text-muted); }

.badge-yes, .badge-no {
  display: inline-flex;
  align-items: center;
  padding: .2rem .55rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .02em;
  border: 1px solid var(--border);
}
.badge-yes { background: var(--success-light); color: #065f46; border-color: #a7f3d0; }
.badge-no  { background: var(--danger-light);  color: #991b1b; border-color: #fecaca; }

/* ── DASHBOARD (EXTRAS) ── */
.dash-quick-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; margin-bottom: 1.25rem; }
.qs-card { background: var(--card); border-radius: var(--radius); padding: 1.1rem 1.25rem; box-shadow: var(--shadow); border: 1.5px solid transparent; }
.qs-card--hot { border-color: #fde68a; background: radial-gradient(800px 220px at 50% -30%, rgba(245,158,11,.20), transparent 70%), var(--card); }
.qs-icon { font-size: 1.35rem; }
.qs-val { font-size: 1.65rem; font-weight: 800; line-height: 1.15; margin-top: .25rem; }
.qs-label { font-size: .72rem; color: var(--text-muted); font-weight: 800; text-transform: uppercase; letter-spacing: .06em; margin-top: .15rem; }

.history-table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 12px; background: #fff; }
.history-table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: .9rem; }
.history-table thead th {
  text-align: left;
  font-size: .72rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: .8rem .9rem;
  background: #f8fafc;
  border-bottom: 1px solid var(--border);
}
.history-table tbody td { padding: .85rem .9rem; border-bottom: 1px solid var(--bg); vertical-align: middle; }
.history-table tbody tr:last-child td { border-bottom: none; }
.history-table tbody tr:hover td { background: #fafafa; }
.muted-cell { color: var(--text-muted); font-size: .85rem; }

.history-pagination { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; margin-top: 1rem; }
.btn-sm-link { font-weight: 800; font-size: .85rem; }
.btn-sm-link:hover { text-decoration: none; }

.score-pill { display: inline-flex; align-items: center; padding: .22rem .6rem; border-radius: 999px; font-size: .78rem; font-weight: 800; border: 1px solid var(--border); background: var(--bg); }
.score-pill.score-good    { background: var(--success-light); border-color: #a7f3d0; color: #065f46; }
.score-pill.score-perfect { background: var(--primary-light); border-color: #bfdbfe; color: #1e40af; }
.score-pill.score-zero    { background: var(--danger-light);  border-color: #fecaca; color: #991b1b; }
.level-dot { display: inline-flex; align-items: center; padding: .18rem .55rem; border-radius: 999px; background: var(--bg); border: 1px solid var(--border); font-size: .78rem; font-weight: 800; }

/* ── PRODUCTS ── */
.product-tabs { display: flex; flex-wrap: wrap; gap: .55rem; margin-bottom: 1.5rem; }
.product-tab {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .42rem .9rem;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  background: #fff;
  color: var(--text);
  font-size: .85rem;
  font-weight: 700;
  transition: background .15s, border-color .15s, transform .1s;
}
.product-tab:hover { text-decoration: none; border-color: #d1d5db; transform: translateY(-1px); }
.product-tab.active { background: var(--primary-light); border-color: #bfdbfe; color: var(--primary); }

.product-section { margin-top: 1.25rem; }
.products-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1rem; }

.product-card {
  position: relative;
  background: var(--card);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1.5px solid transparent;
  transition: transform .15s, box-shadow .15s, border-color .15s;
}
.product-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.product-badge {
  position: absolute; top: .75rem; left: .75rem;
  background: rgba(15,23,42,.92);
  color: #fff;
  font-size: .72rem;
  font-weight: 800;
  padding: .25rem .6rem;
  border-radius: 999px;
}
.product-img { width: 100%; height: 160px; object-fit: cover; background: #f8fafc; }
.product-img-placeholder {
  width: 100%;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  background: radial-gradient(800px 240px at 50% -40%, rgba(37,99,235,.18), transparent 70%), #f8fafc;
  border-bottom: 1px solid var(--border);
}
.product-body { padding: 1rem 1.05rem 1.1rem; }
.product-type-tag { display: inline-flex; padding: .2rem .55rem; border-radius: 999px; background: var(--bg); color: var(--text-muted); font-size: .72rem; font-weight: 800; letter-spacing: .02em; }
.product-title { margin-top: .55rem; font-size: 1.02rem; font-weight: 800; line-height: 1.25; }
.product-desc { margin-top: .45rem; color: var(--text-muted); font-size: .9rem; line-height: 1.55; }
.product-footer { display: flex; align-items: center; justify-content: space-between; gap: .75rem; flex-wrap: wrap; margin-top: .9rem; }
.product-price { font-weight: 900; color: var(--text); font-size: .9rem; }
.product-btn { white-space: nowrap; }

/* ── CONTACT / REVIEWS ── */
.contact-header { margin-bottom: 1.75rem; }
.contact-header h1 { font-size: 1.6rem; font-weight: 800; }
.contact-header p { color: var(--text-muted); margin-top: .25rem; }

.contact-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 1.5rem; align-items: start; }
.contact-info-card .contact-info-row { display: flex; gap: .75rem; padding: .35rem 0; color: var(--text); }

.rating-summary { display: grid; grid-template-columns: 240px 1fr; gap: 1.25rem; margin-bottom: 1.5rem; }
.rating-big { text-align: center; }
.rating-number { font-size: 2.6rem; font-weight: 900; line-height: 1; color: var(--primary); }
.rating-stars-big { margin: .4rem 0 .15rem; font-size: 1.1rem; letter-spacing: 2px; }
.rating-stars-big .star { color: #e5e7eb; }
.rating-stars-big .star.filled { color: var(--gold); }
.rating-count { color: var(--text-muted); font-size: .85rem; }
.rating-breakdown { display: flex; flex-direction: column; gap: .45rem; }
.breakdown-row { display: grid; grid-template-columns: 42px 1fr 32px; gap: .6rem; align-items: center; font-size: .85rem; }
.breakdown-label { color: var(--text-muted); font-weight: 700; }
.breakdown-bar { height: 10px; background: #e5e7eb; border-radius: 999px; overflow: hidden; }
.breakdown-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--success)); border-radius: 999px; }
.breakdown-count { color: var(--text-muted); text-align: right; font-weight: 700; }

.form-textarea {
  width: 100%;
  padding: .85rem .95rem;
  border-radius: 12px;
  border: 1.5px solid var(--border);
  background: #fff;
  font-size: .95rem;
  line-height: 1.6;
  transition: border-color .15s, box-shadow .15s;
  resize: vertical;
}
.form-textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.12); }
.char-count { display: block; margin-top: .35rem; font-size: .78rem; color: var(--text-muted); text-align: right; }

.star-picker { display: inline-flex; flex-direction: row-reverse; gap: .2rem; }
.star-picker input { display: none; }
.star-picker label { cursor: pointer; font-size: 1.65rem; color: #e5e7eb; transition: transform .08s, color .15s; line-height: 1; }
.star-picker label:hover { transform: translateY(-1px); }
.star-picker label:hover,
.star-picker label:hover ~ label { color: var(--gold); }
.star-picker input:checked ~ label { color: var(--gold); }

.comments-col h2 { font-size: 1.15rem; font-weight: 800; margin-bottom: .9rem; }
.featured-comments { display: grid; gap: .85rem; margin-bottom: 1rem; }
.all-comments { display: grid; gap: .85rem; }
.comment-card { background: var(--card); border-radius: 14px; padding: 1.1rem 1.1rem; box-shadow: var(--shadow); border: 1px solid var(--border); }
.comment-card.featured { border-color: #fde68a; background: radial-gradient(800px 220px at 40% -40%, rgba(245,158,11,.18), transparent 70%), var(--card); }
.comment-header { display: flex; align-items: center; gap: .85rem; margin-bottom: .6rem; }
.comment-avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-weight: 900; }
.comment-name { font-weight: 900; }
.featured-tag { font-size: .72rem; font-weight: 900; color: #92400e; background: #fef3c7; padding: .12rem .5rem; border-radius: 999px; margin-left: .4rem; }
.comment-stars { color: var(--gold); font-size: .95rem; letter-spacing: 1px; }
.comment-date { margin-left: auto; color: var(--text-muted); font-size: .78rem; white-space: nowrap; }
.comment-body { color: var(--text); font-size: .92rem; line-height: 1.65; }

@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; }
  .rating-summary { grid-template-columns: 1fr; }
}

/* ── PAYMENTS / SUBSCRIBE ── */
.subscribe-header { text-align: center; padding: 2.5rem 0 2rem; }
.subscribe-header h1 { font-size: 2rem; font-weight: 800; margin-bottom: .5rem; }
.subscribe-header p { color: var(--text-muted); font-size: 1.05rem; }
.plans-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem; margin-bottom: 3rem; }
.plan-card { background: var(--card); border-radius: 14px; padding: 2rem; box-shadow: var(--shadow); position: relative; border: 2px solid var(--border); transition: transform .15s, box-shadow .15s; }
.plan-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.plan-card.plan-popular { border-color: var(--primary); }
.popular-badge { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--primary); color: #fff; padding: .25rem 1.1rem; border-radius: 20px; font-size: .72rem; font-weight: 700; white-space: nowrap; box-shadow: 0 2px 8px rgba(37,99,235,.3); }
.plan-header { text-align: center; margin-bottom: 1.5rem; }
.plan-name { font-size: 1rem; color: var(--text-muted); margin-bottom: .5rem; font-weight: 600; }
.plan-price { display: flex; align-items: baseline; justify-content: center; gap: .1rem; margin-bottom: .4rem; }
.price-currency { font-size: 1.4rem; font-weight: 700; }
.price-amount { font-size: 3.2rem; font-weight: 800; line-height: 1; }
.plan-tagline { font-size: .82rem; color: var(--text-muted); font-style: italic; }
.plan-features { list-style: none; margin-bottom: 1.5rem; }
.plan-features li { padding: .45rem 0; font-size: .875rem; color: var(--text); border-bottom: 1px solid var(--bg); display: flex; align-items: center; gap: .5rem; }
.plan-features li::before { content: '✓'; color: var(--success); font-weight: 700; }
.plan-features li:last-child { border-bottom: none; }
.plan-note { font-size: .72rem; color: var(--text-muted); text-align: center; margin-top: .5rem; }
.subscribe-footer { background: var(--card); border-radius: 14px; padding: 2rem; box-shadow: var(--shadow); }
.subscribe-footer h3 { text-align: center; margin-bottom: 1.5rem; font-size: 1.1rem; font-weight: 700; }
.features-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; max-width: 480px; margin: 0 auto; }
.compare-col h4 { margin-bottom: .75rem; font-size: .95rem; font-weight: 700; padding-bottom: .5rem; border-bottom: 2px solid var(--border); }
.compare-col.member h4 { color: var(--primary); border-bottom-color: var(--primary); }
.compare-col ul { list-style: none; }
.compare-col ul li { padding: .35rem 0; font-size: .875rem; color: var(--text); border-bottom: 1px solid var(--bg); }

/* ── ADS ── */
.promo-ad { border-radius: 8px; overflow: hidden; }
.promo-ad-img { width: 100%; border-radius: 8px; display: block; }

/* ── AUTH (LOGIN / SIGNUP) ── */
.auth-card {
  max-width: 520px;
  margin: 2.5rem auto;
  background: var(--card);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1.5px solid var(--border);
}
.auth-header { text-align: center; margin-bottom: 1.25rem; }
.auth-header h1 { font-size: 1.6rem; font-weight: 800; margin-bottom: .35rem; }
.auth-header p  { color: var(--text-muted); font-size: .95rem; }

.auth-divider { display: flex; align-items: center; gap: .75rem; margin: 1rem 0; color: var(--text-muted); font-size: .85rem; }
.auth-divider::before, .auth-divider::after { content: ""; height: 1px; background: var(--border); flex: 1; }
.auth-divider span { padding: 0 .35rem; }

.form-group { display: flex; flex-direction: column; gap: .35rem; margin-bottom: .9rem; }
.form-group label { font-size: .78rem; font-weight: 700; color: var(--text-muted); letter-spacing: .05em; text-transform: uppercase; }

.auth-card input[type="text"],
.auth-card input[type="email"],
.auth-card input[type="password"] {
  width: 100%;
  padding: .7rem .9rem;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  background: #fff;
  font-size: .95rem;
  transition: border-color .15s, box-shadow .15s;
}
.auth-card input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

.btn-google {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  border: 1.5px solid var(--border);
  background: #fff;
  color: var(--text);
  padding: .6rem 1.1rem;
  border-radius: 10px;
  font-weight: 700;
  transition: transform .1s, box-shadow .15s;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.btn-google:hover { text-decoration: none; transform: translateY(-1px); box-shadow: 0 6px 16px rgba(0,0,0,.10); }

.form-error, .field-error {
  background: var(--danger-light);
  border-left: 4px solid var(--danger);
  color: #991b1b;
  border-radius: 10px;
  padding: .75rem 1rem;
  font-size: .875rem;
  margin-bottom: .85rem;
}
.field-error { margin-top: .4rem; margin-bottom: 0; }
.auth-footer { margin-top: 1.25rem; display: flex; justify-content: center; gap: .6rem; flex-wrap: wrap; font-size: .9rem; color: var(--text-muted); }
.auth-footer a { font-weight: 700; }
.auth-actions { display: flex; gap: .75rem; justify-content: center; margin-top: 1rem; flex-wrap: wrap; }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .quiz-layout { grid-template-columns: 1fr; }
  .quiz-sidebar-left, .quiz-sidebar-right { display: none; }
  .dashboard-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-col--brand { grid-column: 1 / -1; }
  .footer-desc { max-width: 560px; }
}
@media (max-width: 768px) {
  :root { --header-h: 56px; }
  .nav-toggle { display: flex; }
  .main-nav {
    display: none;
    position: absolute; top: var(--header-h); left: 0; right: 0;
    background: #0f172a; flex-direction: column; align-items: flex-start;
    padding: 1rem 1.25rem; gap: .5rem; border-top: 1px solid #1e293b;
    box-shadow: 0 8px 24px rgba(0,0,0,.3);
    margin-left: 0;
    order: 3;
    z-index: 300;
  }
  .main-nav.open { display: flex; }
  .main-nav .nav-link { width: 100%; padding: .6rem .5rem; }
  .user-menu { width: 100%; padding: .5rem 0; border-top: 1px solid #1e293b; margin-top: .25rem; }
  .hero h1 { font-size: 1.75rem; }
  /* Filter row stacks on mobile */
  .filter-row { grid-template-columns: 1fr 1fr; }
  .filter-row .filter-group:last-child { grid-column: 1 / -1; }
  .score-summary { flex-direction: column; gap: 1rem; }
  .features-compare { grid-template-columns: 1fr; }
  .plans-grid { grid-template-columns: 1fr; }
  .question-navigator { justify-content: flex-start; }
  .blur-placeholder-grid { grid-template-columns: 1fr; }
  .quiz-pagination { flex-direction: column; }
  .quiz-pagination .btn-primary, .quiz-pagination .btn-secondary { width: 100%; }
  /* Quiz panel section header stacks */
  .qp-section-header { flex-direction: column; align-items: flex-start; }
  /* Footer: 2 columns on tablet */
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 1.75rem 1.5rem; }
  .footer-col--brand { grid-column: 1 / -1; }
  .footer-desc { max-width: 100%; }
  .footer-bottom { margin-top: 1.75rem; padding-top: 1rem; }
}
@media (max-width: 480px) {
  .promo-ad { display: none; }
  .quiz-topbar { flex-direction: column; gap: .5rem; align-items: flex-start; }
  .courses-grid { grid-template-columns: repeat(2, 1fr); }
  .level-access-grid { gap: .4rem; }
  .level-tile { width: 68px; padding: .65rem .3rem; }
  .filter-row { grid-template-columns: 1fr; }
  /* Footer: Single column stack on small phones */
  .site-footer { padding: 2rem 0 1.25rem; }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .footer-col--brand { grid-column: 1 / -1; text-align: left; }
  .footer-tagline { margin-top: .75rem; }
  .footer-col-title { margin-bottom: .7rem; }
  .footer-col-list { gap: .5rem; }
  .footer-col-list a {
    font-size: .92rem;
    padding: .15rem 0;
    min-height: 28px;
    display: flex;
    align-items: center;
  }
  .footer-bottom {
    margin-top: 1.5rem;
    padding-top: 1rem;
    gap: .25rem;
  }
  .footer-copy { font-size: .8rem; }
  .footer-made { font-size: .76rem; line-height: 1.55; }
}

/* ── EXTRAS ── */
.upsell-banner { margin-top: 2.5rem; }
.upsell-inner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }
.upsell-text h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: .3rem; }
.upsell-text p  { font-size: .875rem; color: var(--text-muted); max-width: 560px; }

.quiz-progress-text { font-size: .8rem; color: var(--text-muted); font-weight: 500; }
.page-indicator { font-size: .82rem; color: var(--text-muted); }

.dash-main { display: flex; flex-direction: column; gap: 1rem; }

/* Sidebar card padding fix */
.quiz-sidebar-left .card,
.quiz-sidebar-right .card { padding: 1rem; }
.sidebar-topics h4 { font-size: .72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .06em; font-weight: 600; margin-bottom: .6rem; }

/* ── ADS — FULL STYLES ── */
.promo-ad { border-radius: 10px; overflow: hidden; width: 100%; }
.promo-ad-img { width: 100%; border-radius: 10px; display: block; }

/* Text-only fallback */
.promo-ad-text {
  display: flex; align-items: center; gap: .6rem;
  background: #f8fafc; border: 1.5px solid var(--border);
  border-radius: 8px; padding: .65rem .9rem; text-decoration: none;
  transition: border-color .15s;
}
.promo-ad-text:hover { border-color: var(--primary); text-decoration: none; }
.promo-ad-label {
  font-size: .65rem; font-weight: 700; color: var(--text-muted);
  background: var(--bg); padding: .1rem .4rem; border-radius: 4px;
  text-transform: uppercase; letter-spacing: .05em; flex-shrink: 0;
}
.promo-ad-title { font-size: .85rem; font-weight: 600; color: var(--text); }

/* Sidebar display ad */
.promo-ad--display_sidebar { margin-bottom: .75rem; }

/* Closing ad between questions */
.closing-ad-slot { margin: .75rem 0; }
.promo-ad--closing { border-radius: 10px; }

/* Interstitial overlay */
.interstitial-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.75);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  z-index: 500; padding: 1.5rem;
  backdrop-filter: blur(4px);
}
.interstitial-inner {
  width: 100%; max-width: 420px;
  display: flex; justify-content: center;
}
.interstitial-footer {
  color: rgba(255,255,255,.8);
  margin-top: 1rem; font-size: .875rem;
  display: flex; align-items: center; gap: .75rem;
}

/* Hide all ads on very small screens */
@media (max-width: 480px) {
  .promo-ad--display_sidebar { display: none; }
  .interstitial-overlay { padding: 1rem; }
}

/* ── SITE ALERTS (inline, not floating) ── */
.site-alerts {
  width: 100%;
  background: transparent;
}
.site-alert {
  display: flex; align-items: center; gap: .75rem;
  padding: .85rem 1.25rem;
  font-size: .9rem; font-weight: 500;
  border-bottom: 1px solid transparent;
  animation: slideDown .25s ease;
}
@keyframes slideDown {
  from { transform: translateY(-8px); opacity: 0; }
  to   { transform: none; opacity: 1; }
}
.site-alert--success { background: #d1fae5; color: #065f46; border-bottom-color: #a7f3d0; }
.site-alert--error,
.site-alert--danger  { background: #fee2e2; color: #991b1b; border-bottom-color: #fecaca; }
.site-alert--warning { background: #fef3c7; color: #92400e; border-bottom-color: #fde68a; }
.site-alert--info    { background: #dbeafe; color: #1e40af; border-bottom-color: #bfdbfe; }
.site-alert__icon    { font-size: 1rem; flex-shrink: 0; }
.site-alert__text    { flex: 1; }
.site-alert__close   {
  background: none; border: none; font-size: 1.2rem; line-height: 1;
  opacity: .5; cursor: pointer; padding: 0; flex-shrink: 0;
  color: inherit;
}
.site-alert__close:hover { opacity: 1; }

/* ── CONFIRM BAR (in-site confirmation, no browser popups) ── */
.confirm-bar {
  position: sticky;
  top: var(--header-h);
  z-index: 250;
  width: 100%;
  background: #0f172a;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.confirm-bar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: .75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.confirm-text {
  color: #e2e8f0;
  font-weight: 600;
  font-size: .95rem;
}
.confirm-actions {
  display: flex;
  align-items: center;
  gap: .6rem;
}
.confirm-bar .btn-secondary {
  background: transparent;
  border-color: rgba(255,255,255,.25);
  color: #e2e8f0;
}
.confirm-bar .btn-secondary:hover {
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.35);
}

/* ── BROWSE COURSES — CASCADING DRILL-DOWN ── */

/* course-card used as a button (topics level) */
button.course-card {
  appearance: none;
  -webkit-appearance: none;
  border: 1.5px solid transparent;
  cursor: pointer;
  text-align: center;
  width: 100%;
  background: var(--card);
}
button.course-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
  text-decoration: none;
}
button.course-card:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* Subtopic cards are <a> links — add the start CTA */
.course-card--subtopic {
  position: relative;
}
.browse-start-cta {
  display: block;
  margin-top: .5rem;
  font-size: .75rem;
  font-weight: 700;
  color: var(--primary);
  opacity: 0;
  transition: opacity .15s;
}
.course-card--subtopic:hover .browse-start-cta { opacity: 1; }

/* Drill-down level wrapper — fade in on swap */
.browse-level {
  animation: browseIn .18s ease;
}
@keyframes browseIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

/* Section heading with inline count badge */
.browse-heading {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: .65rem;
  flex-wrap: wrap;
}
.browse-heading-icon {
  width: 28px;
  height: 28px;
  object-fit: contain;
}
.browse-heading-count {
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg);
  padding: .2rem .7rem;
  border-radius: 20px;
  border: 1px solid var(--border);
}

/* Breadcrumb nav bar */
.browse-nav {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
  padding: .6rem .9rem;
  background: var(--bg);
  border-radius: 8px;
  border: 1px solid var(--border);
}
.browse-back {
  background: none;
  border: none;
  padding: 0;
  font-size: .85rem;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  font-family: var(--font);
  transition: color .12s;
}
.browse-back:hover { color: var(--primary-dark); text-decoration: underline; }
.browse-back--inline { font-weight: 600; }
.browse-nav-sep { color: var(--text-muted); font-size: .85rem; }
.browse-nav-current {
  font-size: .85rem;
  font-weight: 700;
  color: var(--text);
}

/* Spinner */
.browse-spinner-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem;
}
.browse-spin {
  width: 28px;
  height: 28px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: browseSpin .65s linear infinite;
}
@keyframes browseSpin { to { transform: rotate(360deg); } }

/* Empty / error message */
.browse-empty-msg {
  color: var(--text-muted);
  font-size: .9rem;
  text-align: center;
  padding: 2rem 1rem;
}

/* ── EXPLORER CARD (Find Your Topic) ── */
.explorer-card {
  margin-bottom: 2rem;
}
.explorer-header {
  margin-bottom: 1.25rem;
}
.explorer-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: .25rem;
}
.explorer-subtitle {
  font-size: .88rem;
  color: var(--text-muted);
}

/* Dropdowns row */
.explorer-selects {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.explorer-select-group {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  flex: 1;
  min-width: 180px;
}
.explorer-select-group label {
  font-size: .72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.explorer-select {
  padding: .6rem .85rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: .92rem;
  background: #fff;
  color: var(--text);
  font-family: var(--font);
  transition: border-color .15s, box-shadow .15s;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .75rem center;
  padding-right: 2.2rem;
  cursor: pointer;
}
.explorer-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.explorer-select:disabled {
  opacity: .55;
  cursor: not-allowed;
  background-color: var(--bg);
}

/* Section label above results */
.explorer-section-label {
  font-size: .8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: .85rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--border);
}

/* Results grid */
.explorer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: .85rem;
  margin-bottom: 1.25rem;
}

/* Individual item card */
.explorer-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .3rem;
  padding: 1rem 1.1rem;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  color: var(--text);
  font-family: var(--font);
  text-align: left;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .12s, box-shadow .15s;
  text-decoration: none;
  width: 100%;
}
.explorer-item:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--text);
}
.explorer-item-icon {
  font-size: 1.4rem;
  line-height: 1;
  margin-bottom: .15rem;
}
.explorer-item-name {
  font-size: .9rem;
  font-weight: 700;
  line-height: 1.3;
}
.explorer-item-count {
  font-size: .75rem;
  color: var(--text-muted);
  font-weight: 500;
}
.explorer-item-cta {
  font-size: .75rem;
  font-weight: 700;
  color: var(--primary);
  margin-top: .25rem;
  opacity: 0;
  transition: opacity .15s;
}
.explorer-item--subtopic:hover .explorer-item-cta { opacity: 1; }

/* Hint / empty states */
.explorer-hint {
  color: var(--text-muted);
  font-size: .9rem;
  padding: .5rem 0 .25rem;
}
.explorer-empty {
  color: var(--text-muted);
  font-size: .88rem;
  padding: .5rem 0;
  grid-column: 1 / -1;
}

/* Spinner inside explorer */
.explorer-spinner-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

/* Divider between topics and subtopics results */
#explorer-subtopics {
  border-top: 1px solid var(--border);
  padding-top: 1.25rem;
  margin-top: .25rem;
}

@media (max-width: 600px) {
  .explorer-selects { flex-direction: column; }
  .explorer-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: .6rem; }
}

/* ── QUIZ PANEL (topic/subtopic cards below quiz bar) ── */
.quiz-panel {
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity .22s ease, transform .22s ease;
  margin-bottom: 2rem;
}
.quiz-panel--visible {
  opacity: 1;
  transform: none;
}
.quiz-panel-card {
  padding: 1.5rem;
}

/* Section header: label+hint on left, difficulty pills on right */
.qp-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--border);
}
.qp-section-left {
  display: flex;
  flex-direction: column;
  gap: .2rem;
}
.qp-section-label {
  font-size: .8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--primary);
}
.qp-section-hint {
  font-size: .78rem;
  color: var(--text-muted);
}

/* Separator between topics and subtopics rows */
#qp-subtopics-section {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--bg);
}

/* Active card state */
.qp-card--active {
  border-color: var(--primary) !important;
  background: var(--primary-light) !important;
  box-shadow: 0 0 0 3px rgba(37,99,235,.15), var(--shadow) !important;
}
.qp-card--active h3 { color: var(--primary); }

/* Empty message */
.qp-empty {
  color: var(--text-muted);
  font-size: .88rem;
  padding: .5rem 0;
  grid-column: 1 / -1;
}

/* Disabled select */
select:disabled {
  opacity: .5;
  cursor: not-allowed;
  background-color: var(--bg);
}

/* ── DIFFICULTY PILLS ── */
.qp-difficulty-row {
  display: flex;
  align-items: center;
  gap: .4rem;
  flex-wrap: wrap;
  flex-shrink: 0;
}
.qp-diff-label {
  font-size: .72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-right: .15rem;
  white-space: nowrap;
}
.qp-diff-btn {
  padding: .28rem .75rem;
  border-radius: 20px;
  border: 1.5px solid var(--border);
  background: #fff;
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font);
  transition: border-color .15s, background .15s, color .15s;
  white-space: nowrap;
}
.qp-diff-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

/* Active state — primary blue for "All" */
.qp-diff-btn--active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.qp-diff-btn--active:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; }

/* Easy — green accent when active */
.qp-diff-btn--easy.qp-diff-btn--active {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
}
.qp-diff-btn--easy:not(.qp-diff-btn--active):hover { border-color: var(--success); color: var(--success); background: var(--success-light); }

/* Medium — amber accent when active */
.qp-diff-btn--medium.qp-diff-btn--active {
  background: var(--warning);
  border-color: var(--warning);
  color: #fff;
}
.qp-diff-btn--medium:not(.qp-diff-btn--active):hover { border-color: var(--warning); color: #92400e; background: var(--warning-light); }

/* Hard — red accent when active */
.qp-diff-btn--hard.qp-diff-btn--active {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}
.qp-diff-btn--hard:not(.qp-diff-btn--active):hover { border-color: var(--danger); color: var(--danger); background: var(--danger-light); }

/* "All" card special styling */
.qp-all-card {
  border: 2px dashed var(--border) !important;
  background: #f8fafc !important;
}
.qp-all-card:hover {
  border-color: var(--primary) !important;
  background: var(--primary-light) !important;
}
.qp-all-card.qp-card--active {
  border: 2px dashed var(--primary) !important;
  background: var(--primary-light) !important;
}

/* ── COURSE NAV BAR (below main header) ── */
.course-nav {
  background: #fff;
  border-bottom: 2px solid var(--border);
  position: sticky;
  top: var(--header-h);
  z-index: 190;
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}
.course-nav-inner {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  height: 44px;
}
.course-nav-inner::-webkit-scrollbar { display: none; }

.course-nav-label {
  font-size: .72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .07em;
  white-space: nowrap;
  padding-right: .75rem;
  border-right: 1px solid var(--border);
  margin-right: .5rem;
  flex-shrink: 0;
}

.course-nav-tab {
  display: inline-flex;
  align-items: center;
  padding: 0 1.25rem;
  height: 44px;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap;
  font-family: var(--font);
  transition: color .15s, border-color .15s;
  flex-shrink: 0;
  margin-bottom: -2px;
}
.course-nav-tab:hover {
  color: var(--primary);
  background: none;
}
.course-nav-tab--active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  background: none;
}

@media (max-width: 768px) {
  .course-nav-label { display: none; }
  .course-nav-tab { padding: 0 .85rem; font-size: .82rem; }
}

/* ── BROWSE SYLLABUS FILTER PILLS ── */
.browse-syllabus-filter {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.browse-syl-pill {
  padding: .35rem 1rem;
  border-radius: 20px;
  border: 1.5px solid var(--border);
  background: #fff;
  font-size: .88rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font);
  transition: border-color .15s, background .15s, color .15s;
}
.browse-syl-pill:hover { border-color: var(--primary); color: var(--primary); }
.browse-syl-pill--active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ── SYLLABUS GROUP HEADING ── */
.browse-syllabus-group { margin-bottom: 2rem; }
.browse-syllabus-group .browse-heading { margin-bottom: 1rem; }

/* ── PANEL SYLLABUS BADGES ── */
.badge-syllabus {
  display: inline-flex;
  align-items: center;
  padding: .18rem .6rem;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: .72rem;
  font-weight: 700;
  margin-left: .5rem;
}
.badge-no-syllabus {
  display: inline-flex;
  align-items: center;
  padding: .18rem .6rem;
  border-radius: 999px;
  background: var(--bg);
  color: var(--text-muted);
  font-size: .72rem;
  font-weight: 600;
  margin-left: .5rem;
}

/* ── PANEL TABLE ── */
.panel-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.panel-table th {
  text-align: left;
  padding: .75rem 1rem;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  background: #f8fafc;
  border-bottom: 1px solid var(--border);
}
.panel-table td {
  padding: .85rem 1rem;
  border-bottom: 1px solid var(--bg);
  vertical-align: middle;
}
.panel-table tbody tr:last-child td { border-bottom: none; }
.panel-table tbody tr:hover td { background: #fafafa; }

/* ── SYLLABUS PICKER MODAL ── */
.syl-modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 600;
  backdrop-filter: blur(3px);
  animation: fadeIn .18s ease;
}
@keyframes fadeIn { from{opacity:0} to{opacity:1} }
.syl-modal-box {
  background: var(--card);
  border-radius: 16px;
  padding: 2rem;
  max-width: 420px;
  width: 90%;
  box-shadow: var(--shadow-lg);
  position: relative;
  animation: slideUp .2s ease;
}
@keyframes slideUp { from{transform:translateY(16px);opacity:0} to{transform:none;opacity:1} }
.syl-modal-close {
  position: absolute; top: 1rem; right: 1rem;
  background: none; border: none;
  font-size: 1.4rem; line-height: 1;
  color: var(--text-muted); cursor: pointer;
  padding: .2rem .4rem; border-radius: 4px;
  transition: color .12s, background .12s;
}
.syl-modal-close:hover { color: var(--text); background: var(--bg); }
.syl-modal-title { font-size: 1.15rem; font-weight: 800; margin-bottom: .35rem; }
.syl-modal-course {
  font-size: 1rem; font-weight: 700;
  color: var(--primary); margin-bottom: .5rem;
}
.syl-modal-hint { font-size: .88rem; color: var(--text-muted); margin-bottom: 1.25rem; }
.syl-modal-options {
  display: flex; flex-direction: column; gap: .6rem;
}
.syl-modal-btn {
  display: flex; align-items: center; justify-content: space-between;
  padding: .85rem 1.1rem;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-size: .95rem; font-weight: 600;
  color: var(--text);
  cursor: pointer;
  font-family: var(--font);
  transition: border-color .15s, background .15s;
  text-align: left;
}
.syl-modal-btn:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
}
.syl-modal-btn-arrow { font-size: 1rem; color: var(--text-muted); }

/* ── NO COURSES IN SYLLABUS ── */
.browse-no-courses {
  display: flex;
  align-items: center;
  gap: .85rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1.5px dashed var(--border);
  color: var(--text-muted);
  font-size: .9rem;
  margin-bottom: .5rem;
}
.browse-no-courses-icon { font-size: 1.5rem; flex-shrink: 0; }
.browse-no-courses p { margin: 0; }
.browse-no-courses strong { color: var(--text); }