/* ── DESIGN TOKENS ────────────────────────────────── */
:root {
  --brand:      #0176D3;
  --brand-dark: #014486;
  --brand-navy: #032D60;
  --brand-light:#1B96FF;

  --bg:       #F4F6F9;
  --surface:  #FFFFFF;
  --surface2: #F8FAFC;
  --border:   #E2E8F0;
  --border2:  #CBD5E1;

  --text:   #0F172A;
  --text2:  #475569;
  --muted:  #94A3B8;

  --green:  #059669;
  --red:    #DC2626;
  --orange: #D97706;
  --purple: #7C3AED;
  --teal:   #0891B2;
  --pink:   #DB2777;

  /* legacy tokens kept for exam/study/results compatibility */
  --navy:   #032D60;
  --blue:   #0176D3;
  --sky:    #00A1E0;

  --sh-sm: 0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.05);
  --sh-md: 0 4px 12px rgba(0,0,0,.08),0 2px 4px rgba(0,0,0,.05);
  --sh-lg: 0 10px 24px rgba(0,0,0,.09),0 4px 8px rgba(0,0,0,.05);

  --r-sm:  6px;
  --r-md:  10px;
  --r-lg:  14px;
  --r-xl:  20px;
  --r-2xl: 28px;
  --r-full:9999px;
  --ease:  cubic-bezier(.4,0,.2,1);

  /* track colors */
  --t-admin:      #0176D3;
  --t-developer:  #7C3AED;
  --t-architect:  #B45309;
  --t-consultant: #059669;
  --t-marketer:   #DB2777;
  --t-ai:         #0891B2;
  --t-specialist: #475569;
}

/* ── DARK MODE ────────────────────────────────────── */
[data-theme="dark"] {
  --bg:       #0D1521;
  --surface:  #162032;
  --surface2: #1C2B3D;
  --border:   #2A3F58;
  --border2:  #3A5270;
  --text:     #F1F5F9;
  --text2:    #94AAC0;
  --muted:    #5A7A96;
  --brand:    #1B96FF;
  --navy:     #4A9FD4;
  --blue:     #1B96FF;
}
[data-theme="dark"] .app-header {
  background: var(--brand-navy);
  border-bottom: 1px solid rgba(255,255,255,.06);
  box-shadow: 0 1px 0 rgba(255,255,255,.05), 0 4px 16px rgba(0,0,0,.35);
}
[data-theme="dark"] code {
  background:#1E2F42;color:#7EB8E8;
}
[data-theme="dark"] .comparison-table thead th {
  background:#1E2F42;border-bottom-color:#2A3F58;color:#5BC8F5;
}
[data-theme="dark"] .comparison-table tbody tr:hover td { background:#1E2F42 }
[data-theme="dark"] .tip-box {
  background:#2A2000;border-color:#5A4500;color:#E8C040;border-left-color:#D4A017;
}
[data-theme="dark"] .warn-box {
  background:#2A0A0A;border-color:#5A1A1A;color:#F08080;border-left-color:#C23934;
}
[data-theme="dark"] .formula-box {
  background:#1A0F30;border-color:#3A2A60;color:#B08AE0;
}
[data-theme="dark"] .q-dot.un {
  background:#1E2F42;color:var(--muted);border-color:var(--border);
}
[data-theme="dark"] .explanation-box {
  background:#1A2A3A;border-color:#2A4060;
}
[data-theme="dark"] .q-cat-label {
  background:#0A2535;border-color:#1A4560;
}
[data-theme="dark"] .opt { background:var(--surface) }
[data-theme="dark"] .opt:hover:not(.locked) { background:#1A2F45 }
[data-theme="dark"] .opt-letter { background:var(--surface2);border-color:var(--border) }
[data-theme="dark"] .tabs-wrap { background:var(--surface);border-color:var(--border) }
[data-theme="dark"] .topic-tab:hover { background:var(--surface2) }
[data-theme="dark"] .rv-exp { background:var(--surface2);border-color:var(--border) }
[data-theme="dark"] .stat-box { background:var(--surface2);border-color:var(--border) }
[data-theme="dark"] .cat-bar-bg { background:var(--surface2);border-color:var(--border) }
[data-theme="dark"] .q-navigator { background:var(--surface);border-color:var(--border) }
[data-theme="dark"] .q-card { background:var(--surface);border-color:var(--border) }
[data-theme="dark"] .flag-btn.flagged { background:#2A1A00 }
[data-theme="dark"] .cert-subnav { background:var(--surface);border-color:var(--border) }
[data-theme="dark"] .stat-card { background:var(--surface);border-color:var(--border) }
[data-theme="dark"] .stat-card::after { background: linear-gradient(135deg, transparent 60%, rgba(27,150,255,.04)); }
[data-theme="dark"] .stat-icon { filter:brightness(.85) }
[data-theme="dark"] .cert-card { background:var(--surface);border-color:var(--border) }
[data-theme="dark"] .cert-stats-row { border-color:var(--border) }
[data-theme="dark"] .cert-badge-available { background:#14532D;color:#86EFAC }
[data-theme="dark"] .cert-badge-coming { background:transparent; color:var(--muted); border-color:var(--border2); }
[data-theme="dark"] .cert-stat-panel { background:var(--surface);border-color:var(--border) }
[data-theme="dark"] .track-section { border-color: transparent !important; }
[data-theme="dark"] .featured-banner { box-shadow: 0 12px 32px rgba(0,0,0,.45); filter: brightness(.92) saturate(1.1); }
[data-theme="dark"] .stat-card:first-child { border-left: 3px solid var(--brand); }
[data-theme="dark"] .flashcard-back { background: linear-gradient(145deg, var(--surface) 0%, var(--surface2) 100%); }
[data-theme="dark"] .cert-prog-wrap { background:var(--surface2); border-color:var(--border); }
[data-theme="dark"] .history-table th,
[data-theme="dark"] .history-table td { border-color:var(--border) }
[data-theme="dark"] .profile-cert-row { background:var(--surface);border-color:var(--border) }
[data-theme="dark"] .hub-hero {
  background: linear-gradient(-45deg, var(--brand-navy), var(--hero-mid, #032D60), var(--brand), var(--hero-dark, #014486), var(--brand-light));
  background-size: 400% 400%;
  animation: gradientFlow 14s ease infinite;
}
[data-theme="dark"] .track-pill { background: var(--surface2); border-color: var(--border); }
[data-theme="dark"] .ai-disclaimer { background: #2D1F00; border-color: #5A3A00; color: #FCD34D; }
[data-theme="dark"] .hub-footer { background: var(--surface); border-color: var(--border); }
[data-theme="dark"] .disclaimer-box { background: #2D1F00; border-color: #5A3A00; color: #FCD34D; }
[data-theme="dark"] .modal-overlay {
  background: rgba(2, 29, 62, 0.8);
}

/* ── COLOR THEMES ──────────────────────────────────────────────────────── */
[data-color-theme="violet"] {
  --brand: #7C3AED; --brand-navy: #2D1B69; --brand-light: #A78BFA;
  --sky: #7C3AED; --blue: #7C3AED;
  --hero-mid: #3D1F7A; --hero-dark: #1E0F4A;
}
[data-color-theme="emerald"] {
  --brand: #059669; --brand-navy: #064E3B; --brand-light: #34D399;
  --sky: #059669; --blue: #059669;
  --hero-mid: #065F46; --hero-dark: #022C22;
}
[data-color-theme="rose"] {
  --brand: #E11D48; --brand-navy: #4C0519; --brand-light: #FB7185;
  --sky: #E11D48; --blue: #E11D48;
  --hero-mid: #7A0A2C; --hero-dark: #3B0414;
}
[data-color-theme="amber"] {
  --brand: #D97706; --brand-navy: #451A03; --brand-light: #FCD34D;
  --sky: #D97706; --blue: #D97706;
  --hero-mid: #92400E; --hero-dark: #3A1500;
}

/* ── KEYFRAMES ────────────────────────────────────── */
@keyframes pulse {
  0%,100% { opacity:1 }
  50% { opacity:.72 }
}

@keyframes pageIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes gradientFlow {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes badge-pulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(5,150,105,.4); }
  55%      { box-shadow: 0 0 0 6px rgba(5,150,105,.0); }
}
@keyframes fadeSlideIn {
  from { opacity:0; transform:translateY(6px); }
  to   { opacity:1; transform:translateY(0); }
}

/* ── RESET ────────────────────────────────────────── */
*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }

/* Global smooth transitions for theme/color changes */
* {
  transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

/* Override for interactive elements — use precise transition list instead */
button, a, .cert-card, .stat-card, .profile-cert-row {
  transition: transform .18s var(--ease), box-shadow .18s var(--ease),
              background .15s, color .15s, border-color .15s, opacity .15s;
}

html { scroll-behavior:smooth; }
body {
  font-family: 'Inter','Segoe UI',system-ui,sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background .25s, color .25s;
}
a { color:var(--blue); text-decoration:none; }
strong { font-weight:700; }
code {
  font-family: 'Courier New',monospace;
  background: #EEF4FF;
  color: var(--navy);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: .83em;
}

/* ── SCROLLBAR ────────────────────────────────────── */
::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:var(--border2); border-radius:3px; }
::-webkit-scrollbar-thumb:hover { background:#A8BDD5; }

/* ── MODAL ────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(2, 29, 62, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
  padding: 20px;
}
.modal-box {
  background: var(--surface);
  border-radius: var(--r-xl);
  padding: 40px;
  width: 100%; max-width: 460px;
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 24px 64px rgba(0,0,0,.2), 0 8px 24px rgba(0,0,0,.12);
  text-align: center;
  position: relative;
}
.modal-close-btn {
  position: absolute;
  top: 14px; right: 14px;
  width: 30px; height: 30px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: .85rem;
  color: var(--text2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  line-height: 1;
  transition: background .15s, color .15s;
}
.modal-close-btn:hover { background: var(--border); color: var(--text); }
.modal-box h2 { font-size:1.5rem; font-weight:800; color:var(--text); margin-bottom:8px; }
.modal-box p  { color:var(--text2); margin-bottom:28px; }
.modal-logo   { margin-bottom:20px; display:flex; justify-content:center; }
.logo-badge-lg {
  width: 56px; height: 56px;
  background: linear-gradient(135deg,var(--brand),var(--brand-light));
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; font-weight: 900; color: #fff;
  box-shadow: 0 4px 16px rgba(0,0,0,.25);
}
.form-group { text-align:left; margin-bottom:20px; }
.form-group label {
  display:block; font-weight:600; font-size:.85rem; color:var(--text2);
  margin-bottom:6px; text-transform:uppercase; letter-spacing:.5px;
}
.form-group input {
  width: 100%; padding: 11px 14px;
  border: 1.5px solid var(--border2);
  border-radius: var(--r-md);
  font-size: .95rem; font-family: inherit;
  background: var(--surface2); color: var(--text);
  transition: border-color .15s;
  outline: none;
}
.form-group input:focus { border-color:var(--brand); }
.avatar-grid { display:flex; flex-wrap:wrap; gap:8px; justify-content:center; }
.avatar-opt {
  width: 44px; height: 44px;
  border-radius: 50%; border: 2.5px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; cursor: pointer; transition: all .15s;
  background: var(--surface2);
}
.avatar-opt:hover    { border-color:var(--brand); transform:scale(1.1); }
.avatar-opt.selected { border-color:var(--brand); background:rgba(1,118,211,.1); transform:scale(1.1); }
.btn-primary {
  width: 100%; padding: 13px;
  background: var(--brand); color: #fff;
  border: none; border-radius: var(--r-lg);
  font-size: 1rem; font-weight: 700; cursor: pointer;
  transition: background .15s, transform .1s;
}
.btn-primary:hover { background:var(--brand-dark); transform:translateY(-1px); }

/* ── HEADER ───────────────────────────────────────── */
.app-header {
  background: var(--brand-navy);
  color: #fff;
  padding: 0 24px;
  height: 60px;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 300;
  border-bottom: 1px solid rgba(255,255,255,.06);
  box-shadow: 0 1px 0 rgba(255,255,255,.05), 0 4px 16px rgba(0,0,0,.25);
}
.header-left { display:flex; align-items:center; gap:16px; }
.logo { display:flex; align-items:center; gap:10px; font-weight:800; font-size:.95rem; color:#fff; }
.logo-badge {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--brand), var(--brand-light));
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: .72rem; font-weight: 900; color: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
  flex-shrink: 0;
  transition: background .3s;
}
.logo-text { font-size:.9rem; font-weight:700; opacity:.95; }
.breadcrumbs { display:flex; align-items:center; gap:6px; font-size:.82rem; color:rgba(255,255,255,.6); }
.bc-sep     { opacity:.5; }
.bc-link    { color:rgba(255,255,255,.7); transition:color .15s; }
.bc-link:hover { color:#fff; }
.bc-current { color:#fff; font-weight:600; }
.header-right { display:flex; align-items:center; gap:8px; }
.icon-btn {
  background: rgba(255,255,255,.1); border: none;
  width: 34px; height: 34px; border-radius: 8px;
  cursor: pointer; font-size: 1rem; color: #fff;
  display: flex; align-items: center; justify-content: center;
  transition: background .15s;
}
.icon-btn:hover { background:rgba(255,255,255,.2); }
.profile-btn {
  display: flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  padding: 5px 12px 5px 6px;
  border-radius: var(--r-full);
  cursor: pointer; color: #fff;
  font-size: .82rem; font-weight: 600;
  transition: background .15s;
}
.profile-btn:hover { background:rgba(255,255,255,.2); }
.profile-avatar { font-size:1.1rem; }
.timer-badge {
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.2);
  color: #fff;
  padding: 4px 12px; border-radius: var(--r-full);
  font-size: .8rem; font-weight: 700; font-variant-numeric: tabular-nums;
  letter-spacing: .5px;
}
.timer-badge.warning { background:#C23934; border-color:#E74C3C; animation:pulse 1s infinite; }

/* ── CERT SUBNAV ──────────────────────────────────── */
.cert-subnav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex; gap: 4px;
  position: sticky; top: 60px; z-index: 200;
  box-shadow: 0 1px 0 var(--border), 0 2px 8px rgba(0,0,0,.04);
}
.subnav-btn {
  background: none; border: none;
  padding: 14px 18px;
  font-size: .85rem; font-weight: 600; color: var(--text2);
  cursor: pointer;
  border-bottom: 2.5px solid transparent;
  margin-bottom: -1px;
  font-family: inherit;
  position: relative;
  transition: color .15s;
}
.subnav-btn:hover { color:var(--brand); }
.subnav-btn.active {
  color: var(--brand); border-bottom: 3px solid var(--brand);
  font-weight: 700; background: transparent;
}
.subnav-btn.active::after {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 2.5px; background: var(--brand);
  border-radius: 2px 2px 0 0;
}

/* ── PAGE SYSTEM ──────────────────────────────────── */
.page { display:none; min-height:calc(100vh - 60px); }
.page.active {
  display: block;
  animation: pageIn .22s cubic-bezier(.4,0,.2,1) both;
}

/* ── HUB PAGE ─────────────────────────────────────── */
@keyframes gradientFlow {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hub-hero {
  background: linear-gradient(-45deg, var(--brand-navy), var(--hero-mid, #0A3F80), var(--brand), var(--hero-dark, #014486), var(--brand-light));
  background-size: 400% 400%;
  animation: gradientFlow 14s ease infinite;
  color: #fff;
  padding: 56px 24px 48px;
  position: relative;
  overflow: hidden;
}
.hub-hero::before {
  content: '';
  position: absolute;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: rgba(255,255,255,.04);
  top: -200px; right: -100px;
  pointer-events: none;
}
.hub-hero::after {
  content: '';
  position: absolute;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: rgba(255,255,255,.03);
  bottom: -150px; left: 10%;
  pointer-events: none;
}
.hub-hero-inner { max-width:1100px; margin:0 auto; display:flex; flex-direction:column; align-items:center; text-align:center; }

.unofficial-badge {
  font-size: .55em; font-weight: 700; color: rgba(255,255,255,.7);
  vertical-align: super; letter-spacing: 0;
}
.hub-unofficial-notice {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--r-md);
  padding: 10px 20px;
  font-size: .78rem;
  color: rgba(255,255,255,.75);
  text-align: center;
  max-width: 700px;
  margin: 14px auto 0;
}

.hub-greeting {
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  opacity: .65;
  margin-bottom: 8px;
  z-index: 1; position: relative;
}
.hub-title {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}
.hub-sub {
  opacity: .75;
  font-size: .975rem;
  max-width: 560px;
  line-height: 1.65;
  z-index: 1; position: relative;
  margin: 0 auto;
}
.hub-body { max-width:1100px; margin:0 auto; padding:40px 28px; }
#static-content-wrap {
  border-top: 1px solid var(--border);
  margin-top: 32px;
  padding-top: 8px;
}
.static-seo-content {
  padding: 24px 0; line-height: 1.75; color: var(--text);
  max-width: 880px; margin: 0 auto;
}
.static-seo-content h2 { font-size:1.4rem; margin: 24px 0 12px; font-weight: 800; }
.static-seo-content h3 { font-size:1.1rem; margin:24px 0 8px; font-weight: 700; }
.static-seo-content h4 { font-size:.98rem; margin:18px 0 6px; font-weight: 700; color: var(--text); }
.static-seo-content p { font-size:.95rem; margin-bottom:12px; }
.static-seo-content ul, .static-seo-content ol { font-size:.95rem; padding-left:22px; margin-bottom:12px; }
.static-seo-content li { margin-bottom:8px; }
.static-seo-content a { color: var(--brand); }
.static-seo-content strong { font-weight: 700; color: var(--text); }
.static-seo-content em { font-style: italic; }

/* ── FEATURED / NEXT STEP ─────────────────────────── */
.featured-banner {
  background: linear-gradient(135deg, var(--brand-navy) 0%, var(--brand) 100%);
  border-radius: var(--r-xl);
  padding: 28px 32px;
  color: #fff;
  display: flex; align-items: center; gap: 24px;
  margin-bottom: 36px;
  position: relative; overflow: hidden;
  box-shadow: 0 12px 32px rgba(0,0,0,.22), 0 4px 12px rgba(0,0,0,.14);
}
.featured-banner::after {
  content: '';
  position: absolute;
  width: 260px; height: 260px; border-radius: 50%;
  background: rgba(255,255,255,.07);
  right: -70px; top: -100px;
  pointer-events: none;
}
.featured-banner::before {
  content: '';
  position: absolute;
  width: 120px; height: 120px; border-radius: 50%;
  background: rgba(255,255,255,.04);
  left: -30px; bottom: -50px;
  pointer-events: none;
}
.featured-icon { font-size: 2.6rem; flex-shrink: 0; filter: drop-shadow(0 2px 8px rgba(0,0,0,.2)); }
.featured-body { flex: 1; }
.featured-eyebrow { font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .8px; opacity: .65; margin-bottom: 6px; }
.featured-title { font-size: 1.35rem; font-weight: 800; margin-bottom: 7px; letter-spacing: -.4px; }
.featured-sub { font-size: .85rem; opacity: .78; line-height: 1.6; }
.featured-actions { display:flex; gap:10px; flex-shrink:0; flex-wrap:wrap; }
.btn-featured-primary {
  padding: 10px 22px; background: #fff; border: none;
  border-radius: var(--r-lg); font-size: .88rem; font-weight: 700;
  cursor: pointer; color: var(--brand-navy); font-family: inherit;
  transition: transform .15s, opacity .15s;
}
.btn-featured-primary:hover { transform: translateY(-1px); opacity: .92; }
.btn-featured-secondary {
  padding: 10px 20px;
  background: rgba(255,255,255,.12);
  border: 1.5px solid rgba(255,255,255,.28);
  border-radius: var(--r-lg); font-size: .88rem; font-weight: 700;
  cursor: pointer; color: #fff; font-family: inherit;
  transition: background .15s;
}
.btn-featured-secondary:hover { background: rgba(255,255,255,.22); }
@media(max-width:640px) {
  .featured-banner { flex-direction:column; align-items:flex-start; }
  .featured-actions { width:100%; }
}

/* ── STATS DASHBOARD ──────────────────────────────── */
.stats-dashboard {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 16px; margin-bottom: 40px;
}
@media(max-width:800px){ .stats-dashboard { grid-template-columns:repeat(2,1fr); } }
@media(max-width:480px){ .stats-dashboard { grid-template-columns:1fr; } }

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 22px 20px;
  display: flex; align-items: center; gap: 16px;
  box-shadow: var(--sh-sm);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
  position: relative; overflow: hidden;
}
.stat-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 60%, rgba(1,118,211,.03));
  pointer-events: none;
}
.stat-card:first-child { border-left: 3px solid var(--brand); }
.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,.1), 0 2px 8px rgba(0,0,0,.06);
}
.stat-icon {
  width: 48px; height: 48px;
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; flex-shrink: 0;
}
.stat-info { flex:1; }
.stat-num { font-size: 2.1rem; font-weight: 900; color: var(--text); line-height: 1; letter-spacing: -1px; }
.stat-label { font-size: .72rem; color: var(--muted); font-weight: 500; margin-top: 5px; text-transform: uppercase; letter-spacing: .5px; }

/* ── TRACK SECTIONS ───────────────────────────────── */
.track-section {
  margin-bottom: 56px;
  padding: 28px 28px 32px;
  border-radius: var(--r-xl);
  border: 1px solid transparent;
  transition: border-color .2s;
  box-shadow: var(--sh-sm);
}
.track-header {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 20px; padding-bottom: 16px;
  border-bottom: 2px solid var(--border);
}
.track-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.track-title {
  font-size: 1.1rem; font-weight: 800; color: var(--text);
  letter-spacing: -.2px;
}

.track-pill {
  display: flex; align-items: center; gap: 6px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  padding: 4px 12px 4px 8px;
  font-size: .8rem; font-weight: 700;
}
.track-count { margin-left:auto; font-size:.72rem; color:var(--muted); text-transform: uppercase; letter-spacing: .4px; font-weight: 600; }

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill,minmax(260px,1fr));
  gap: 18px;
}

/* ── CERT CARDS ───────────────────────────────────── */
.cert-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--r-lg);
  padding: 22px;
  cursor: pointer;
  transition: transform .18s var(--ease), box-shadow .2s var(--ease), border-color .18s, opacity .15s;
  position: relative; overflow: hidden;
  animation: fadeSlideIn .3s var(--ease) both;
}
.cert-card.available {
  border-color: var(--border);
  box-shadow: var(--sh-sm);
}
.cert-card.available:hover {
  transform: translateY(-5px);
  box-shadow: var(--card-hover-shadow, 0 14px 32px rgba(0,0,0,.12)), 0 4px 12px rgba(0,0,0,.07);
  border-color: var(--brand);
  background: linear-gradient(160deg, var(--surface2) 0%, var(--surface) 100%);
}
.cert-card.available:active { transform: translateY(-2px); }
.cert-card.locked {
  opacity: .42;
  cursor: not-allowed;
  border-style: dashed;
  border-color: var(--border2);
}
.cert-card.locked:hover { transform:none; box-shadow:none; opacity:.42; }

/* Cert icon scales on card hover */
.cert-card:hover .cert-icon { transform: scale(1.1); }

.cert-card-accent {
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
}
.cert-card-top { display:flex; align-items:flex-start; justify-content:space-between; margin-bottom:12px; }
.cert-icon {
  width: 42px; height: 42px;
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; flex-shrink: 0;
  transition: transform .18s var(--ease);
}
.cert-badge-available {
  font-size: .68rem; font-weight: 800;
  padding: 4px 10px; border-radius: var(--r-full);
  background: #DCFCE7; color: #166534;
  letter-spacing: .4px;
  animation: badge-pulse 2.8s ease infinite;
}
.cert-badge-coming {
  font-size: .68rem; font-weight: 500;
  padding: 3px 9px; border-radius: var(--r-full);
  background: transparent; color: var(--muted);
  border: 1px dashed var(--border2);
  letter-spacing: .2px;
}
.cert-name { font-size: .93rem; font-weight: 700; color: var(--text); margin-bottom: 4px; line-height: 1.35; }
.cert-abbr { font-size: .72rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .35px; }
.cert-stats-row {
  display: flex; gap: 14px; margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  align-items: flex-end;
}
.cert-stat {
  font-size: .68rem; color: var(--muted); font-weight: 500;
  text-transform: uppercase; letter-spacing: .5px;
  flex: 1;
}
.cert-stat strong {
  display: block; font-size: 1.05rem; font-weight: 800;
  color: var(--text); margin-bottom: 2px; letter-spacing: -.3px;
}
.cert-no-attempts {
  font-size: .8rem; color: var(--muted); padding: 10px 0 2px;
  font-style: italic;
}

/* cert progress bar */
.cert-prog-wrap {
  margin-top: 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  height: 7px; overflow: hidden;
  position: relative;
}
.cert-prog-fill {
  height: 100%; border-radius: var(--r-full);
  transition: width .5s var(--ease);
  position: relative;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.25);
}
.cert-prog-footer {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 6px;
}
.cert-prog-pct { font-size:.7rem; font-weight:700; color:var(--text2); }
.cert-prog-pass { font-size:.68rem; color:var(--muted); }

/* ── CERT HOME PAGE ───────────────────────────────── */
.cert-home-hero {
  padding: 36px 24px 28px;
  color: #fff;
  position: relative; overflow: hidden;
}
.cert-home-hero::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(0,0,0,.15) 0%, transparent 60%);
  pointer-events: none;
}
.cert-home-inner { max-width:900px; margin:0 auto; padding:28px 24px; }
.cert-home-meta { display:flex; flex-wrap:wrap; gap:10px; margin-top:16px; }
.cert-meta-pill {
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.2);
  color: #fff; font-size: .8rem; font-weight: 600;
  padding: 5px 12px; border-radius: var(--r-full);
}
.cert-actions { display:flex; gap:12px; margin-top:24px; flex-wrap:wrap; }
.btn-cert-primary {
  padding: 12px 28px;
  background: #fff;
  border: none; border-radius: var(--r-lg);
  font-size: .95rem; font-weight: 700; cursor: pointer;
  transition: all .15s;
  font-family: inherit;
}
.btn-cert-primary:hover { opacity:.9; transform:translateY(-1px); }
.btn-cert-secondary {
  padding: 12px 28px;
  background: rgba(255,255,255,.15);
  border: 1.5px solid rgba(255,255,255,.3);
  color: #fff; border-radius: var(--r-lg);
  font-size: .95rem; font-weight: 700; cursor: pointer;
  transition: all .15s;
  font-family: inherit;
}
.btn-cert-secondary:hover { background:rgba(255,255,255,.25); }

/* ── QUICK QUIZ BUTTON ────────────────────────────── */
.btn-quiz {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px;
  background: rgba(255,255,255,.12);
  border: 1.5px solid rgba(255,255,255,.25);
  color: #fff; border-radius: var(--r-lg);
  font-size: .9rem; font-weight: 700; cursor: pointer;
  transition: all .18s;
}
.btn-quiz:hover { background:rgba(255,255,255,.2); transform:translateY(-1px); }

.cert-stats-panels {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 16px;
  margin-bottom: 28px;
}
@media(max-width:640px){ .cert-stats-panels { grid-template-columns:1fr; } }
.cert-stat-panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 20px; text-align: center;
  box-shadow: var(--sh-sm);
}
.cert-stat-panel .big-num { font-size:2rem; font-weight:800; color:var(--text); line-height:1; }
.cert-stat-panel .panel-label { font-size:.78rem; color:var(--muted); text-transform:uppercase; letter-spacing:.4px; margin-top:4px; }
.cert-history-section { margin-top:8px; }
.cert-history-section h3 { font-size:1rem; font-weight:700; margin-bottom:14px; color:var(--text); }
.history-table { width:100%; border-collapse:collapse; }
.history-table th {
  text-align:left; font-size:.75rem; font-weight:600; color:var(--muted);
  text-transform:uppercase; letter-spacing:.4px;
  padding:8px 12px; border-bottom:1px solid var(--border);
}
.history-table td { padding:10px 12px; font-size:.85rem; border-bottom:1px solid var(--border); color:var(--text2); }
.history-table tr:last-child td { border-bottom:none; }
.history-table .pass-badge { color:#059669; font-weight:700; }
.history-table .fail-badge { color:#DC2626; font-weight:700; }

/* ── PROFILE PAGE ─────────────────────────────────── */
.profile-page-inner { max-width:800px; margin:0 auto; padding:32px 24px; }
.profile-hero-card {
  background: linear-gradient(135deg, var(--brand-navy) 0%, var(--brand) 100%);
  border-radius: var(--r-xl); padding: 32px; color: #fff;
  display: flex; align-items: center; gap: 24px;
  margin-bottom: 28px;
  flex-wrap: wrap;
  position: relative; overflow: hidden;
}
.profile-hero-card::after {
  content: '';
  position: absolute;
  width: 300px; height: 300px; border-radius: 50%;
  background: rgba(255,255,255,.05);
  top: -150px; right: -50px;
  pointer-events: none;
}
.profile-big-avatar {
  font-size: 3.5rem;
  background: rgba(255,255,255,.12);
  width: 72px; height: 72px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.profile-hero-name { font-size:1.6rem; font-weight:800; margin-bottom:4px; }
.profile-hero-sub  { opacity:.7; font-size:.9rem; }
.profile-edit-btn {
  margin-left: auto;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  color: #fff; padding: 8px 18px; border-radius: var(--r-lg);
  font-size: .85rem; font-weight: 600; cursor: pointer;
  transition: background .15s;
  font-family: inherit;
}
.profile-edit-btn:hover { background:rgba(255,255,255,.25); }
.profile-section { margin-bottom:28px; }
.profile-section h3 { font-size:1rem; font-weight:700; color:var(--text); margin-bottom:14px; }
.profile-cert-list { display:flex; flex-direction:column; gap:10px; }
.profile-cert-row {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 16px 20px;
  display: flex; align-items: center; gap: 16px;
  box-shadow: var(--sh-sm);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background .15s, color .15s, border-color .15s, opacity .15s;
}
.profile-cert-row:hover {
  transform: translateY(-2px);
  box-shadow: var(--sh-md);
}
.profile-cert-icon { font-size:1.4rem; }
.profile-cert-info { flex:1; }
.profile-cert-name { font-size:.9rem; font-weight:700; color:var(--text); }
.profile-cert-meta { font-size:.78rem; color:var(--muted); margin-top:2px; }
.profile-cert-score { font-size:1.1rem; font-weight:800; }

/* ── AD UNITS ─────────────────────────────────────── */
.ad-unit {
  max-width: 1100px;
  margin: 0 auto 24px;
  padding: 0 24px;
  text-align: center;
  min-height: 90px;
}
.ad-unit::before {
  content: 'Advertisement';
  display: block;
  font-size: .6rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 4px;
  opacity: .7;
}
/* Hide ad unit if AdSense hasn't filled it (no empty white space) */
.ad-unit:has(> ins[data-ad-status="unfilled"]) { display: none; }
/* Results page ad sits between hero and domain breakdown */
.ad-unit-results {
  max-width: 820px;
  margin: 0 auto 24px;
  padding: 0 20px;
  min-height: 90px;
}

/* ── HUB FOOTER ───────────────────────────────────── */
.hub-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  margin-top: 16px;
}
.hub-footer-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.hub-footer p { font-size:.78rem; color:var(--muted); line-height:1.6; max-width:640px; }
.hub-footer a { color:var(--brand); }
.ai-disclaimer {
  display: inline-flex; align-items: center; gap: 6px;
  background: #FFFBEB; border: 1px solid #FCD34D;
  color: #92400E; border-radius: var(--r-full);
  padding: 4px 12px; font-size: .75rem; font-weight: 600;
  margin-bottom: 6px;
}
.about-link {
  background: none; border: none; color: var(--brand);
  font-size: .78rem; cursor: pointer; text-decoration: underline;
  font-family: inherit; padding: 0;
}
.hub-footer-links {
  display: flex; flex-wrap: wrap; justify-content: center; align-items: center;
  gap: 8px; margin-top: 4px; font-size: .78rem;
}
.hub-footer-links a {
  color: var(--brand); text-decoration: none; font-weight: 500;
}
.hub-footer-links a:hover { text-decoration: underline; }
.hub-footer-links span { color: var(--muted); }

/* Standalone content pages (about, faq, study-tips, privacy) */
.content-page {
  max-width: 820px; margin: 0 auto; padding: 32px 24px 64px;
  line-height: 1.7; color: var(--text);
}
.content-page h1 {
  font-size: 1.9rem; font-weight: 800; margin-bottom: 8px; line-height: 1.25;
}
.content-page .content-lead {
  color: var(--muted); font-size: 1rem; margin-bottom: 28px;
}
.content-page h2 {
  font-size: 1.25rem; font-weight: 800; margin: 32px 0 10px;
  border-bottom: 1px solid var(--border); padding-bottom: 6px;
}
.content-page h3 {
  font-size: 1rem; font-weight: 700; margin: 22px 0 6px; color: var(--text);
}
.content-page p { margin: 10px 0; font-size: .95rem; }
.content-page ul, .content-page ol { margin: 10px 0 10px 22px; }
.content-page li { margin: 6px 0; font-size: .95rem; }
.content-page a { color: var(--brand); }
.content-page .back-link {
  display: inline-block; color: var(--brand); font-weight: 600;
  text-decoration: none; margin-bottom: 16px; font-size: .9rem;
}
.content-page .back-link:hover { text-decoration: underline; }
.content-page .meta-row {
  display: flex; gap: 14px; flex-wrap: wrap; color: var(--muted);
  font-size: .8rem; margin-bottom: 24px;
}
.content-page .callout {
  background: #FFFBEB; border: 1px solid #FCD34D; color: #92400E;
  border-radius: var(--r-md); padding: 14px 16px; margin: 20px 0;
  font-size: .9rem;
}
[data-theme="dark"] .content-page .callout {
  background: rgba(245, 158, 11, .12); border-color: rgba(245, 158, 11, .35);
  color: #FCD34D;
}

/* ── ABOUT MODAL ──────────────────────────────────── */
.about-modal-box {
  max-width: 520px;
  text-align: left;
}
.about-modal-box h2 { text-align:center; margin-bottom:6px; }
.about-section { margin: 20px 0; }
.about-section h4 {
  font-size: .85rem; font-weight: 700; color: var(--text2);
  text-transform: uppercase; letter-spacing: .5px; margin-bottom: 8px;
}
.about-section p,
.about-section li { font-size:.88rem; color:var(--text2); line-height:1.65; }
.about-section ul { padding-left:18px; }
.about-section li { margin-bottom:4px; }
.disclaimer-box {
  background: #FFFBEB; border: 1.5px solid #FCD34D;
  border-radius: var(--r-md); padding: 14px 16px;
  font-size: .85rem; color: #92400E; line-height: 1.6;
}

/* ── KEYBOARD HINT ────────────────────────────────── */
.kb-hint {
  font-size: .71rem; color: var(--muted); text-align: center;
  margin-top: 10px; letter-spacing: .2px;
}
.kb-hint kbd {
  display: inline-block;
  background: var(--surface2); border: 1px solid var(--border2);
  border-radius: 4px; padding: 1px 6px; font-size: .69rem;
  font-family: 'Courier New',monospace; color: var(--text2);
  margin: 0 2px; box-shadow: 0 1px 0 var(--border2);
}

/* ── STUDY ────────────────────────────────────────── */
#study-page { max-width:1140px; margin:0 auto; padding:34px 20px 60px; }
.study-header { display:flex; align-items:flex-start; justify-content:space-between; margin-bottom:26px; gap:16px; flex-wrap:wrap; }
.study-header-text h2 { font-size:1.5rem; font-weight:800; color:var(--navy); letter-spacing:-.3px; margin-bottom:4px; }
.study-header-text p  { color:var(--text2); font-size:.9rem; }

.tabs-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-2xl);
  padding: 5px;
  display: flex; gap: 3px; flex-wrap: wrap;
  margin-bottom: 26px;
  box-shadow: var(--sh-sm);
}
.topic-tab {
  padding: 9px 17px; border-radius: var(--r-xl);
  border: none; background: transparent;
  font-size: .81rem; font-weight: 600;
  font-family: inherit; cursor: pointer;
  color: var(--text2);
  transition: all .17s var(--ease);
  white-space: nowrap; letter-spacing: .1px;
}
.topic-tab:hover   { background:var(--bg); color:var(--blue); }
.topic-tab.active  { background:var(--blue); color:#fff; box-shadow:0 2px 12px rgba(0,112,210,.3); }

#topic-contents { scroll-margin-top:82px; }
.topic-content { display:none; }
.topic-content.active { display:block; }
.study-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(360px,1fr)); gap:24px; }

.study-card {
  background: var(--surface);
  border-radius: var(--r-lg);
  padding: 28px;
  box-shadow: var(--sh-md);
  border: 1px solid var(--border);
  border-top: 4px solid var(--blue);
  transition: .2s var(--ease);
}
.study-card:hover { box-shadow:var(--sh-lg); transform:translateY(-2px); }
.study-card h3 {
  font-size: .94rem; font-weight: 800;
  color: var(--text); margin-bottom: 16px;
  padding-bottom: 14px; border-bottom: 1px solid var(--border);
  letter-spacing: -.05px;
}
.study-card ul { list-style:none; display:flex; flex-direction:column; gap:9px; }
.study-card li { font-size:.86rem; line-height:1.62; padding-left:16px; position:relative; color:var(--text2); }
.study-card li::before { content:'›'; color:var(--blue); position:absolute; left:0; font-weight:800; font-size:.98rem; line-height:1.4; }
.study-card p { font-size:.86rem; line-height:1.65; color:var(--text2); }

.comparison-table { width:100%; border-collapse:collapse; font-size:.81rem; border-radius:var(--r-md); overflow:hidden; }
.comparison-table thead th {
  background: #EEF5FF; color: var(--blue);
  padding: 10px 12px; text-align: left;
  font-weight: 700; border-bottom: 2px solid #C6DDF8;
  white-space: nowrap;
}
.comparison-table tbody tr:nth-child(even) td { background:var(--surface2); }
.comparison-table tbody tr:hover td { background:#EEF5FF; transition:background .12s; }
.comparison-table td {
  padding: 9px 12px; border-bottom: 1px solid var(--border);
  vertical-align: top; color: var(--text2); line-height: 1.5;
}
.comparison-table tbody tr:last-child td { border-bottom:none; }

.tip-box {
  background: #FFFAEB; border: 1px solid #F0D878;
  border-left: 4px solid #D4A017;
  padding: 14px 16px; border-radius: var(--r-md);
  font-size: .85rem; color: #6B4F00; line-height: 1.65; margin-top: 4px;
}
.warn-box {
  background: #FEF3F2; border: 1px solid #FBCCC8;
  border-left: 4px solid var(--red);
  padding: 14px 16px; border-radius: var(--r-md);
  font-size: .85rem; color: #7D1F1A; line-height: 1.65;
}
.formula-box {
  background: #F6F2FF; border: 1px solid #DDD3F5;
  border-left: 4px solid var(--purple);
  padding: 14px 16px; border-radius: var(--r-md);
  font-size: .81rem; font-family: 'Courier New',monospace;
  color: #4B1D96; line-height: 1.85;
}

/* ── EXAM ─────────────────────────────────────────── */
#exam-page { max-width:840px; margin:0 auto; padding:28px 20px 70px; }

.exam-top-bar { display:flex; align-items:center; gap:12px; margin-bottom:18px; }
.exam-progress-wrap {
  flex: 1; background: var(--border);
  border-radius: var(--r-full); height: 8px; overflow: hidden;
}
.exam-progress-bar {
  background: linear-gradient(90deg,var(--sky),var(--blue));
  height: 100%; border-radius: var(--r-full);
  transition: width .5s var(--ease);
}
.exam-pct-label { font-size:.76rem; font-weight:700; color:var(--muted); white-space:nowrap; min-width:34px; text-align:right; }

.exam-meta-row { display:flex; justify-content:space-between; align-items:center; margin-bottom:14px; }
.exam-counter-text { font-size:.87rem; font-weight:600; color:var(--text2); }
.flag-btn {
  display: flex; align-items: center; gap: 6px;
  background: none; border: 1.5px solid var(--border2);
  padding: 6px 14px; border-radius: var(--r-full);
  cursor: pointer; font-size: .77rem; font-weight: 600;
  font-family: inherit; color: var(--muted);
  transition: .17s var(--ease);
}
.flag-btn:hover   { border-color:var(--orange); color:var(--orange); }
.flag-btn.flagged { border-color:var(--orange); color:var(--orange); background:#FFF4E6; }

.q-navigator {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 18px 20px;
  box-shadow: var(--sh-sm); margin-bottom: 16px;
}
.q-navigator-head { display:flex; align-items:center; justify-content:space-between; margin-bottom:13px; }
.q-navigator-head h4 { font-size:.75rem; font-weight:700; color:var(--muted); text-transform:uppercase; letter-spacing:.8px; }
.q-nav-legend { display:flex; gap:12px; font-size:.71rem; color:var(--muted); font-weight:600; align-items:center; flex-wrap:wrap; }
.legend-swatch { width:10px; height:10px; border-radius:3px; display:inline-block; margin-right:3px; vertical-align:middle; }

.q-dots { display:flex; flex-wrap:wrap; gap:6px; }
.q-dot {
  width: 32px; height: 32px; border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: .72rem; font-weight: 700; cursor: pointer;
  border: 2px solid transparent;
  transition: all .14s var(--ease); font-family: inherit;
  background: none;
}
.q-dot.un      { background:var(--bg); color:var(--muted); border-color:var(--border); }
.q-dot.cor     { background:#D1FAE5; color:#065F46; border-color:#6EE7B7; }
.q-dot.wrg     { background:#FEE2E2; color:#7F1D1D; border-color:#FCA5A5; }
.q-dot.flagged { background:#FEF3C7; color:#92400E; border-color:#FCD34D; }
.q-dot.cur     { border-color:var(--blue); box-shadow:0 0 0 3px rgba(0,112,210,.18); transform:scale(1.14); }
.q-dot:hover:not(.cur) { transform:scale(1.08); }

.q-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 32px;
  box-shadow: var(--sh-md); margin-bottom: 16px;
  scroll-margin-top: 82px;
}
.q-cat-label {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .7rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1px; color: var(--sky);
  background: #EAF7FF; padding: 4px 12px;
  border-radius: var(--r-full); margin-bottom: 16px;
  border: 1px solid #B3E5FA;
}
.q-text {
  font-size: 1.05rem; line-height: 1.78; font-weight: 600;
  color: var(--text); margin-bottom: 24px; letter-spacing: -.1px;
  word-break: break-word; overflow-wrap: break-word;
}
.options { display:flex; flex-direction:column; gap:10px; }
.opt {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 14px 18px; border: 2px solid var(--border);
  border-radius: var(--r-md); cursor: pointer;
  transition: all .14s var(--ease);
  background: var(--surface); width: 100%; text-align: left;
  font-family: inherit;
}
.opt:hover:not(.locked) { border-color:var(--sky); background:#E7F8FE; box-shadow:0 0 0 4px rgba(0,161,224,.14); border-width: 2px; }
.opt.correct    { border-color:#10B981; background:#ECFDF5; box-shadow:0 0 0 3px rgba(16,185,129,.1); }
.opt.wrong      { border-color:#EF4444; background:#FEF2F2; box-shadow:0 0 0 3px rgba(239,68,68,.1); }
.opt.show-answer{ border-color:#10B981; background:#ECFDF5; box-shadow:0 0 0 3px rgba(16,185,129,.1); }
.opt.locked     { cursor:default; }

.opt-letter {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: .77rem; flex-shrink: 0;
  transition: all .14s var(--ease); color: var(--muted);
}
.opt:hover:not(.locked) .opt-letter { border-color:var(--sky); color:var(--sky); }
.opt.correct      .opt-letter { background:#10B981; border-color:#10B981; color:#fff; }
.opt.wrong        .opt-letter { background:#EF4444; border-color:#EF4444; color:#fff; }
.opt.show-answer  .opt-letter { background:#10B981; border-color:#10B981; color:#fff; }

.opt-text { font-size:.93rem; line-height:1.55; padding-top:3px; color:var(--text2); font-weight:500; }

.result-banner {
  display: none; margin-top: 18px; padding: 14px 18px;
  border-radius: var(--r-md); font-size: .92rem; font-weight: 700;
  align-items: center; gap: 10px;
}
.result-banner.correct-banner { background:#ECFDF5; color:#065F46; border:1px solid #6EE7B7; display:flex; }
.result-banner.wrong-banner   { background:#FEF2F2; color:#7F1D1D; border:1px solid #FCA5A5; display:flex; }
.result-icon { font-size:1.1rem; flex-shrink:0; }

.explanation-box {
  display: none; margin-top: 12px; padding: 16px 20px;
  background: #F0F7FF; border: 1px solid #C6DDF8;
  border-left: 4px solid var(--blue); border-radius: var(--r-md);
  font-size: .87rem; line-height: 1.72; color: var(--text2);
}
.explanation-box strong { color:var(--blue); font-weight:700; }

.exam-nav { display:flex; justify-content:space-between; align-items:center; margin-top:16px; gap:10px; }
.nav-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 11px 24px; border-radius: var(--r-md);
  font-weight: 700; font-size: .87rem; font-family: inherit;
  cursor: pointer; transition: all .17s var(--ease);
  border: 2px solid var(--blue); letter-spacing: .1px;
}
.nav-btn.prev { background:var(--surface); color:var(--blue); }
.nav-btn.prev:hover:not(:disabled) { background:#EEF5FF; box-shadow:var(--sh-sm); }
.nav-btn.next-q { background:var(--blue); color:#fff; border-color:var(--blue); box-shadow:0 2px 10px rgba(0,112,210,.3); }
.nav-btn.next-q:hover:not(:disabled) { background:#0058BB; box-shadow:0 4px 18px rgba(0,112,210,.42); transform:translateY(-1px); }
.nav-btn:disabled { opacity:.32; cursor:not-allowed; transform:none !important; box-shadow:none !important; }
.submit-exam-btn {
  display: flex; align-items: center; gap: 6px;
  background: linear-gradient(135deg,#E74C3C,#C23934);
  color: #fff; border: none; padding: 11px 24px;
  border-radius: var(--r-md); font-weight: 700; font-size: .87rem;
  font-family: inherit; cursor: pointer;
  transition: all .17s var(--ease);
  box-shadow: 0 2px 10px rgba(194,57,52,.3);
}
.submit-exam-btn:hover { filter:brightness(1.08); transform:translateY(-1px); box-shadow:0 4px 18px rgba(194,57,52,.42); }

/* ── RESULTS ──────────────────────────────────────── */
#results-page { max-width:820px; margin:0 auto; padding:36px 20px 70px; }

.result-hero {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-2xl); padding: 44px 40px 36px;
  text-align: center; box-shadow: var(--sh-lg); margin-bottom: 22px;
  position: relative; overflow: hidden;
}
.result-hero::before {
  content: ''; position: absolute;
  top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg,var(--sky),var(--blue),var(--purple));
}
.result-hero h2 { font-size:1.6rem; font-weight:800; color:var(--navy); margin-bottom:6px; letter-spacing:-.3px; }
.result-hero>p  { color:var(--text2); font-size:.95rem; }

.score-ring {
  width: 160px; height: 160px; border-radius: 50%;
  border: 12px solid var(--border);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  margin: 28px auto; transition: border-color .6s, box-shadow .6s;
}
.score-ring.pass { border-color:#10B981; box-shadow: 0 0 0 10px rgba(16,185,129,.1), 0 8px 32px rgba(16,185,129,.2); }
.score-ring.fail { border-color:#EF4444; box-shadow: 0 0 0 10px rgba(239,68,68,.08), 0 8px 32px rgba(239,68,68,.15); }
.score-ring .pct { font-size:2.8rem; font-weight:900; letter-spacing:-2px; }
.score-ring.pass .pct { color:#065F46; }
.score-ring.fail .pct { color:#7F1D1D; }
.score-ring .sub { font-size:.77rem; color:var(--muted); font-weight:600; }

.verdict {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 24px; border-radius: var(--r-full);
  font-weight: 800; font-size: .94rem;
  margin-bottom: 16px; letter-spacing: .3px;
}
.verdict.pass { background:#ECFDF5; color:#065F46; border:2px solid #6EE7B7; }
.verdict.fail { background:#FEF2F2; color:#7F1D1D; border:2px solid #FCA5A5; }

.stat-row { display:grid; grid-template-columns:repeat(3,1fr); gap:14px; margin-top:26px; }
.stat-box { background:var(--surface2); border:1px solid var(--border); padding:18px 12px; border-radius:var(--r-md); text-align:center; }
.stat-box .n { font-size:2rem; font-weight:900; letter-spacing:-1px; line-height:1; margin-bottom:4px; }
.stat-box .l { font-size:.73rem; color:var(--muted); font-weight:700; text-transform:uppercase; letter-spacing:.5px; }

.section-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 28px;
  box-shadow: var(--sh-md); margin-bottom: 20px;
}
.section-card h3 {
  font-size: .98rem; font-weight: 800; color: var(--navy);
  margin-bottom: 22px; padding-bottom: 14px;
  border-bottom: 1px solid var(--border); letter-spacing: -.2px;
}
.cat-row { margin-bottom:16px; }
.cat-row-top { display:flex; justify-content:space-between; font-size:.86rem; margin-bottom:7px; font-weight:600; }
.cat-row-top span:first-child { color:var(--text2); }
.cat-bar-bg  { background:var(--bg); border-radius:var(--r-full); height:10px; border:1px solid var(--border); overflow:hidden; }
.cat-bar-fill{ height:100%; border-radius:var(--r-full); transition:width .9s var(--ease); }

.review-item {
  border: 1px solid var(--border); border-radius: var(--r-md);
  padding: 18px 20px; margin-bottom: 12px;
  transition: .17s var(--ease);
}
.review-item:hover { box-shadow:var(--sh-sm); }
.review-item.rv-c  { border-left:4px solid #10B981; }
.review-item.rv-w  { border-left:4px solid #EF4444; }
.rv-num     { font-size:.7rem; color:var(--muted); margin-bottom:6px; font-weight:700; letter-spacing:.3px; text-transform:uppercase; }
.rv-q       { font-size:.9rem; font-weight:600; margin-bottom:10px; line-height:1.55; color:var(--text); }
.rv-ans     { font-size:.84rem; display:flex; gap:12px; flex-wrap:wrap; margin-bottom:10px; flex-direction:column; }
.rv-yours   { font-size:.84rem; font-weight:600; }
.rv-c-ans   { color:#065F46; }
.rv-w-ans   { color:#7F1D1D; }
.rv-correct-ans { font-size:.84rem; color:#065F46; font-weight:600; }
.rv-exp {
  font-size: .83rem; background: var(--surface2); border: 1px solid var(--border);
  padding: 11px 15px; border-radius: var(--r-sm); color: var(--text2); line-height: 1.62;
  cursor: pointer;
}
.rv-exp-toggle    { font-weight:600; margin-bottom:0; }
.rv-exp-content   { display:none; margin-top:8px; }
.rv-exp.open .rv-exp-content  { display:block; }
.rv-exp.open .rv-exp-toggle::before { content:'▼ '; font-size:.75rem; }
.rv-exp-toggle::before { content:'▶ '; font-size:.75rem; }

.result-actions { display:flex; gap:12px; justify-content:center; margin-top:28px; flex-wrap:wrap; }
.result-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: var(--r-md); border: none;
  font-weight: 700; font-size: .91rem; font-family: inherit;
  cursor: pointer; transition: all .18s var(--ease); letter-spacing: .1px;
}
.result-btn.primary { background:var(--blue); color:#fff; box-shadow:0 2px 10px rgba(0,112,210,.3); }
.result-btn.primary:hover { background:#0058BB; box-shadow:0 4px 20px rgba(0,112,210,.42); transform:translateY(-2px); }
.result-btn.success { background:var(--green); color:#fff; box-shadow:0 2px 10px rgba(4,132,75,.3); }
.result-btn.success:hover { background:#036B3E; box-shadow:0 4px 20px rgba(4,132,75,.42); transform:translateY(-2px); }

/* ── RESPONSIVE ───────────────────────────────────── */
@media(max-width:640px) {
  .app-header { padding:0 16px; }
  .hub-title  { font-size:1.5rem; }
  .stat-row   { grid-template-columns:repeat(2,1fr); }
  .study-grid { grid-template-columns:1fr; }
  .q-card     { padding:20px 16px; }
  .result-hero{ padding:32px 20px; }
  .exam-nav   { flex-wrap:wrap; }
  .tabs-wrap  { border-radius:var(--r-lg); }
  .profile-hero-card { flex-direction:column; text-align:center; }
  .profile-edit-btn  { margin-left:0; }
  /* Ensure option buttons meet 44px minimum touch target on mobile */
  .opt { min-height:48px; padding:12px 14px; }
  .options { gap:12px; }
}

/* ── FLASHCARD MODE ────────────────────────────────── */
.flashcard-page-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 32px 24px 48px;
}
.flashcard-header {
  display: flex; align-items: flex-start; justify-content: space-between;
  margin-bottom: 24px;
}
.flashcard-header h2 { font-size: 1.4rem; font-weight: 800; color: var(--text); }
.fc-controls { display:flex; gap:8px; }
.fc-control-btn {
  background: var(--surface2); border: 1px solid var(--border);
  width: 36px; height: 36px; border-radius: var(--r-md);
  font-size: 1rem; cursor: pointer; color: var(--text2);
  display: flex; align-items: center; justify-content: center;
  transition: background .15s;
}
.fc-control-btn:hover { background: var(--border); }
.fc-progress-row {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 28px; font-size: .82rem; color: var(--muted);
}
.fc-prog-bar-wrap {
  flex: 1; height: 5px; background: var(--border);
  border-radius: var(--r-full); overflow: hidden;
}
.fc-prog-bar-fill {
  height: 100%; background: var(--brand);
  border-radius: var(--r-full);
  transition: width .35s var(--ease);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.25);
}
/* 3D flip card */
.flashcard-scene {
  perspective: 1200px;
  width: 100%; height: 280px;
  margin-bottom: 28px;
}
.flashcard {
  width: 100%; height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform .5s cubic-bezier(.4,0,.2,1);
  cursor: pointer;
  border-radius: var(--r-xl);
}
.flashcard.flipped { transform: rotateY(180deg); }
.flashcard-face {
  position: absolute; inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--r-xl);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 32px 36px;
  text-align: center;
  box-shadow: var(--sh-lg);
}
.flashcard-front {
  background: linear-gradient(145deg, var(--brand-navy), var(--brand));
  color: #fff;
}
.flashcard-back {
  background: linear-gradient(145deg, var(--surface2) 0%, var(--surface) 100%);
  border: 2px solid var(--border);
  transform: rotateY(180deg);
  color: var(--text);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06);
}
.fc-label {
  font-size: .68rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: 1.2px; opacity: .6; margin-bottom: 14px;
}
.fc-front-text {
  font-size: 1.25rem; font-weight: 800;
  line-height: 1.35; color: #fff;
}
.fc-back-text {
  font-size: .95rem; line-height: 1.65;
  color: var(--text2);
}
.fc-hint {
  position: absolute; bottom: 18px;
  font-size: .72rem; opacity: .45; letter-spacing: .3px;
}
/* Flashcard action buttons */
.fc-actions {
  display: flex; align-items: center; gap: 10px;
  flex-wrap: wrap;
}
.fc-btn {
  padding: 10px 18px; border-radius: var(--r-lg);
  font-size: .85rem; font-weight: 700;
  cursor: pointer; font-family: inherit;
  transition: all .15s;
}
.fc-btn-prev, .fc-btn-next {
  background: var(--surface2); border: 1px solid var(--border);
  color: var(--text2);
}
.fc-btn-prev:hover, .fc-btn-next:hover { background: var(--border); }
.fc-vote-btns { display:flex; gap:8px; flex:1; justify-content:center; }
.fc-btn-known {
  background: #DCFCE7; color: #166534; border: 1.5px solid #6EE7B7;
  flex: 1; max-width: 180px;
}
.fc-btn-known:hover { background: #BBF7D0; transform: translateY(-1px); }
.fc-btn-unknown {
  background: var(--surface2); color: var(--text2); border: 1.5px solid var(--border);
  flex: 1; max-width: 180px;
}
.fc-btn-unknown:hover { background: var(--border); }
.fc-complete-panel {
  text-align: center; padding: 40px 20px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-xl); margin-top: 16px;
}
.fc-complete-panel h3 { font-size: 1.4rem; font-weight: 800; margin-bottom: 8px; }
.fc-complete-panel p  { color: var(--text2); }
/* Dark mode */
[data-theme="dark"] .flashcard-back { background:var(--surface); border-color:var(--border); }
[data-theme="dark"] .fc-complete-panel { background:var(--surface); border-color:var(--border); }

/* ── DOMAIN DRILL ──────────────────────────────────── */
.domain-option {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px;
  background: var(--surface2); border: 1.5px solid var(--border);
  border-radius: var(--r-lg); cursor: pointer;
  transition: all .15s;
}
.domain-option:hover { border-color: var(--brand); background: var(--surface); transform: translateX(4px); }
.domain-option-name { font-size: .9rem; font-weight: 600; color: var(--text); }
.domain-option-count { font-size: .75rem; color: var(--muted); }
.domain-drill-go {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--brand); color: #fff;
  border: none; border-radius: var(--r-full);
  padding: 4px 12px; font-size: .75rem; font-weight: 700;
  cursor: pointer; font-family: inherit;
}
[data-theme="dark"] .domain-option { background:var(--surface2); border-color:var(--border); }
[data-theme="dark"] .domain-option:hover { background:var(--surface); }

/* ── STUDY GUIDE CONTENT POLISH ────────────────────── */
.section-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--sh-sm);
}
.section-card h3 {
  font-size: 1rem; font-weight: 800; color: var(--text);
  margin-bottom: 14px; padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.content-list { padding-left: 0; list-style: none; display: flex; flex-direction: column; gap: 8px; }
.content-list li {
  padding: 8px 12px 8px 14px;
  background: var(--surface2);
  border-radius: var(--r-md);
  border-left: 3px solid var(--brand);
  font-size: .875rem; line-height: 1.6;
}
[data-theme="dark"] .section-card { background:var(--surface); border-color:var(--border); }

/* ── RESULTS PAGE REFRESH ──────────────────────────── */
.result-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 40px 24px 36px;
  text-align: center;
}
.result-cert-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--r-full); padding: 5px 14px;
  font-size: .78rem; font-weight: 700; color: var(--text2);
  margin-bottom: 20px;
}
.result-hero .verdict {
  display: inline-block;
  padding: 6px 20px; border-radius: var(--r-full);
  font-size: .8rem; font-weight: 800; letter-spacing: 1px;
  text-transform: uppercase; margin-bottom: 12px;
}
.result-hero .verdict.pass { background:#DCFCE7; color:#166534; }
.result-hero .verdict.fail { background:#FEE2E2; color:#991B1B; }
.result-hero h2 { font-size: 1.6rem; font-weight: 900; margin-bottom: 8px; }
.result-hero > p { color: var(--text2); font-size: .9rem; max-width: 500px; margin: 0 auto 24px; }
.score-ring {
  width: 130px; height: 130px;
  border-radius: 50%;
  border: 6px solid;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  margin: 0 auto 24px;
}
.score-ring.pass { border-color: #10B981; }
.score-ring.fail { border-color: #EF4444; }
.score-ring .pct { font-size: 1.8rem; font-weight: 900; line-height: 1; }
.score-ring .sub { font-size: .72rem; color: var(--muted); margin-top: 2px; }
.stat-row { display:flex; gap:12px; justify-content:center; flex-wrap:wrap; margin-bottom:24px; }
.stat-box {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 14px 20px; min-width: 90px; text-align: center;
}
.stat-box .n { font-size: 1.3rem; font-weight: 800; line-height: 1; }
.stat-box .l { font-size: .7rem; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; margin-top: 4px; }
.result-actions {
  display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 4px;
}
[data-theme="dark"] .result-hero { background:var(--surface); border-color:var(--border); }
[data-theme="dark"] .stat-box { background:var(--surface2); border-color:var(--border); }
[data-theme="dark"] .result-cert-badge { background:var(--surface2); border-color:var(--border); }

/* ── AVATAR CREATOR ─────────────────────────────────── */
.avatar-creator {
  display: flex; gap: 20px; align-items: flex-start;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 16px;
}
.avatar-preview-wrap { flex-shrink: 0; }
.avatar-preview {
  width: 72px; height: 72px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; font-weight: 900; color: #fff;
  transition: all .2s var(--ease);
  box-shadow: 0 4px 16px rgba(0,0,0,.15);
}
#avatar-preview-initials { pointer-events: none; }
.avatar-creator-right { flex: 1; }
.avatar-creator-label { font-size: .72rem; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 8px; }
.avatar-color-grid {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.avatar-color-swatch {
  width: 28px; height: 28px; border-radius: 50%;
  border: 3px solid transparent; cursor: pointer;
  transition: transform .12s, border-color .12s;
  outline: none;
}
.avatar-color-swatch:hover { transform: scale(1.15); }
.avatar-color-swatch.selected { border-color: var(--text); transform: scale(1.1); }
.avatar-shape-row { display: flex; gap: 8px; }
.avatar-shape-btn {
  width: 36px; height: 36px; border: 2px solid var(--border);
  background: var(--surface); border-radius: var(--r-md);
  font-size: 1.1rem; cursor: pointer; color: var(--muted);
  display: flex; align-items: center; justify-content: center;
  transition: all .12s;
}
.avatar-shape-btn.active { border-color: var(--brand); color: var(--brand); background: #EFF6FF; }

/* ── THEME PICKER ───────────────────────────────────── */
.theme-picker-wrap { position: relative; }
.theme-picker-dropdown {
  position: absolute; right: 0; top: calc(100% + 8px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 10px;
  gap: 8px;
  box-shadow: var(--sh-lg);
  z-index: 200;
}
.theme-swatch {
  width: 26px; height: 26px; border-radius: 50%;
  border: 3px solid transparent; cursor: pointer;
  transition: transform .12s, border-color .12s;
}
.theme-swatch:hover { transform: scale(1.2); }
.theme-swatch.active { border-color: var(--text); }

/* ── DAILY CHALLENGE WIDGET ─────────────────────────── */
.daily-challenge {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--r-xl);
  padding: 24px 28px;
  margin-bottom: 36px;
  box-shadow: var(--sh-sm);
  border-left: 4px solid var(--brand);
}
.dc-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 18px;
}
.dc-title-row { display: flex; gap: 12px; align-items: center; }
.dc-icon { font-size: 1.6rem; }
.dc-title { font-size: 1rem; font-weight: 800; color: var(--text); letter-spacing: -.2px; }
.dc-subtitle { font-size: .75rem; color: var(--muted); margin-top: 2px; font-weight: 500; }
.dc-refresh-btn {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--r-md); padding: 6px 12px;
  font-size: 1.1rem; cursor: pointer; color: var(--muted);
  transition: all .15s; font-weight: 700;
}
.dc-refresh-btn:hover { background: var(--border); color: var(--text); transform: rotate(90deg); }
.dc-question {
  font-size: .95rem; font-weight: 600; color: var(--text);
  line-height: 1.65; margin-bottom: 16px;
  word-break: break-word;
}
.dc-options { display: flex; flex-direction: column; gap: 8px; }
.dc-opt {
  text-align: left; padding: 10px 14px;
  background: var(--surface2); border: 1.5px solid var(--border);
  border-radius: var(--r-md); font-size: .85rem; font-weight: 500;
  cursor: pointer; color: var(--text); font-family: inherit;
  transition: all .12s;
}
.dc-opt:hover:not(:disabled) { border-color: var(--brand); background: #EFF6FF; }
.dc-opt.dc-correct { background: #ECFDF5; border-color: #10B981; color: #065F46; font-weight: 700; }
.dc-opt.dc-wrong   { background: #FEF2F2; border-color: #EF4444; color: #7F1D1D; }
.dc-opt:disabled   { cursor: default; }
.dc-result {
  margin-top: 14px; padding: 12px 14px;
  border-radius: var(--r-md); font-size: .83rem; line-height: 1.55;
}
.dc-result-pass { background: #ECFDF5; color: #065F46; border: 1px solid #6EE7B7; }
.dc-result-fail { background: #FEF2F2; color: #7F1D1D; border: 1px solid #FCA5A5; }
[data-theme="dark"] .dc-opt:hover:not(:disabled) { background: rgba(1,118,211,.12); }

/* ── CERT SECTION HEADINGS ──────────────────────────── */
.cert-section-heading {
  font-size: .78rem; font-weight: 700; color: var(--muted);
  text-transform: uppercase; letter-spacing: .6px;
  margin: 24px 0 12px;
}