/**
 * CompTIA Security+ SY0-701 Practice Test
 * Clean Dark-Accent Professional Design System
 * gcppcatest.com/comptia
 */

/* =========================================================
   CSS VARIABLES
   ========================================================= */
:root {
    /* Brand */
    --ct-bg:       #F8FAFC;
    --ct-navy:     #1E3A5F;
    --ct-navy-dk:  #0F172A;
    --ct-blue:     #2563EB;
    --ct-blue-lt:  #EFF6FF;
    --ct-blue-md:  #DBEAFE;
    --ct-green:    #16A34A;
    --ct-green-lt: #F0FDF4;
    --ct-red:      #DC2626;
    --ct-red-lt:   #FEF2F2;
    --ct-amber:    #D97706;
    --ct-amber-lt: #FFFBEB;

    /* Text */
    --ct-text:     #0F172A;
    --ct-muted:    #64748B;
    --ct-subtle:   #94A3B8;

    /* Surface */
    --ct-card:     #FFFFFF;
    --ct-border:   #E2E8F0;
    --ct-border-dk:#CBD5E1;

    /* Shadows */
    --ct-shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --ct-shadow:    0 4px 12px rgba(0,0,0,0.08);
    --ct-shadow-lg: 0 10px 30px rgba(0,0,0,0.10);

    /* Typography */
    --ct-font:     'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --ct-mono:     'Courier New', Courier, monospace;

    /* Spacing */
    --s1: 0.25rem; --s2: 0.5rem;  --s3: 0.75rem; --s4: 1rem;
    --s5: 1.25rem; --s6: 1.5rem;  --s8: 2rem;    --s10: 2.5rem;
    --s12: 3rem;   --s16: 4rem;   --s20: 5rem;

    /* Border radius */
    --r-sm: 4px; --r-md: 8px; --r-lg: 12px; --r-full: 9999px;

    /* Transitions */
    --t-fast: 150ms ease;
    --t-base: 280ms ease;

    /* Layout */
    --ct-max-w: 1200px;
    --ct-header-h: 64px;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root.ct-auto-dark,
    :root[data-theme="dark"] {
        --ct-bg:     #0F172A;
        --ct-card:   #1E293B;
        --ct-border: #334155;
        --ct-text:   #F1F5F9;
        --ct-muted:  #94A3B8;
        --ct-subtle: #64748B;
    }
}
:root[data-theme="dark"] {
    --ct-bg:     #0F172A;
    --ct-card:   #1E293B;
    --ct-border: #334155;
    --ct-text:   #F1F5F9;
    --ct-muted:  #94A3B8;
    --ct-subtle: #64748B;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--ct-font);
    background: var(--ct-bg);
    color: var(--ct-text);
    line-height: 1.6;
    min-height: 100vh;
    padding-top: var(--ct-header-h);
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a   { color: var(--ct-blue); text-decoration: none; }
a:hover { text-decoration: underline; }
ul  { list-style: none; }
button { font-family: var(--ct-font); cursor: pointer; }

/* =========================================================
   LAYOUT
   ========================================================= */
.ct-container {
    width: 100%;
    max-width: var(--ct-max-w);
    margin: 0 auto;
    padding: 0 var(--s6);
}
@media (min-width: 768px) { .ct-container { padding: 0 var(--s8); } }

.ct-section { padding: var(--s16) 0; }
.ct-section-sm { padding: var(--s10) 0; }

.ct-grid-2 { display: grid; gap: var(--s6); }
.ct-grid-3 { display: grid; gap: var(--s6); }
.ct-grid-4 { display: grid; gap: var(--s5); }

@media (min-width: 640px)  { .ct-grid-2 { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 768px)  { .ct-grid-3 { grid-template-columns: repeat(3,1fr); } }
@media (min-width: 1024px) { .ct-grid-4 { grid-template-columns: repeat(4,1fr); } }

/* =========================================================
   HEADER
   ========================================================= */
.ct-header {
    position: fixed;
    top: 3px; /* below the top progress bar */
    left: 0;
    right: 0;
    height: var(--ct-header-h);
    background: #38373c;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    z-index: 500;
    transition: box-shadow var(--t-base);
}
.ct-header.scrolled { box-shadow: var(--ct-shadow); }

.ct-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: var(--s6);
}

/* Logo */
.ct-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--s3);
    text-decoration: none;
    color: #fff;
    font-weight: 600;
    flex-shrink: 0;
}
.ct-logo:hover { text-decoration: none; }
.ct-logo-icon {
    width: 36px; height: 36px;
    background: var(--ct-navy);
    color: #fff;
    border-radius: var(--r-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem;
}
.ct-logo-text { font-size: 1.05rem; letter-spacing: -0.01em; }
.ct-logo-plus { color: var(--ct-blue); }

/* Nav */
.ct-nav { display: none; align-items: center; gap: var(--s2); }
@media (min-width: 768px) { .ct-nav { display: flex; } }

.ct-nav-link {
    display: inline-flex;
    align-items: center;
    gap: var(--s2);
    padding: var(--s2) var(--s3);
    border-radius: var(--r-md);
    font-size: 0.9rem;
    font-weight: 400;
    color: rgba(255,255,255,0.78);
    text-decoration: none;
    transition: color var(--t-fast), background var(--t-fast);
}
.ct-nav-link:hover { color: #fff; background: rgba(255,255,255,0.10); text-decoration: none; }
.ct-nav-link.active { color: #fff; font-weight: 600; background: rgba(255,255,255,0.15); }

/* Hamburger */
.ct-hamburger {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 24px; height: 18px;
    background: none;
    border: none;
    padding: 0;
}
@media (min-width: 768px) { .ct-hamburger { display: none; } }
.ct-hamburger span {
    display: block;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform var(--t-fast), opacity var(--t-fast);
}
.ct-hamburger.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.ct-hamburger.open span:nth-child(2) { opacity: 0; }
.ct-hamburger.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* Mobile nav drawer */
.ct-nav-mobile {
    display: none;
    flex-direction: column;
    position: fixed;
    top: var(--ct-header-h);
    left: 0; right: 0;
    background: #38373c;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding: var(--s4) var(--s6);
    gap: var(--s2);
    z-index: 499;
    box-shadow: var(--ct-shadow);
}
.ct-nav-mobile.open { display: flex; }
.ct-nav-mobile .ct-nav-link { font-size: 1rem; padding: var(--s3) var(--s4); }

/* =========================================================
   HERO
   ========================================================= */
.ct-hero {
    background: linear-gradient(180deg, #38373c 0%, #28272c 100%);
    color: #fff;
    padding: var(--s20) 0 var(--s16);
    text-align: center;
}
.ct-hero h1 {
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 600;
    line-height: 1.25;
    color: #fff;
    margin-bottom: var(--s4);
    letter-spacing: -0.02em;
}
.ct-hero-sub {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.78);
    max-width: 620px;
    margin: 0 auto var(--s8);
    line-height: 1.7;
}
.ct-hero-badges {
    display: flex;
    gap: var(--s3);
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: var(--s8);
}
.ct-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--s2);
    padding: var(--s2) var(--s4);
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--r-full);
    font-size: 0.82rem;
    font-weight: 600;
    color: rgba(255,255,255,0.9);
}
.ct-hero-cta { display: flex; gap: var(--s4); justify-content: center; flex-wrap: wrap; }

/* =========================================================
   BUTTONS
   ========================================================= */
.ct-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--s2);
    padding: 0.7rem 1.4rem;
    border-radius: var(--r-md);
    font-size: 0.95rem;
    font-weight: 600;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--t-fast);
    text-decoration: none;
    line-height: 1;
    white-space: nowrap;
}
.ct-btn:hover { text-decoration: none; transform: translateY(-1px); }
.ct-btn:active { transform: translateY(0); }

.ct-btn-primary  { background: var(--ct-blue);   color: #fff;             border-color: var(--ct-blue);  }
.ct-btn-primary:hover  { background: #1d4ed8; border-color: #1d4ed8; color: #fff; }

.ct-btn-white    { background: #fff; color: var(--ct-navy); border-color: #fff; }
.ct-btn-white:hover { background: #f1f5f9; border-color: #f1f5f9; color: var(--ct-navy); }

.ct-btn-outline  { background: transparent; color: #fff; border-color: rgba(255,255,255,0.5); }
.ct-btn-outline:hover { background: rgba(255,255,255,0.1); color: #fff; border-color: rgba(255,255,255,0.8); }

.ct-btn-secondary { background: var(--ct-bg); color: var(--ct-text); border-color: var(--ct-border); }
.ct-btn-secondary:hover { background: var(--ct-border); border-color: var(--ct-border-dk); color: var(--ct-text); }

.ct-btn-sm { padding: 0.45rem 0.9rem; font-size: 0.82rem; }
.ct-btn-lg { padding: 0.9rem 1.8rem; font-size: 1rem;   }

.ct-btn-flag { background: var(--ct-amber-lt); color: var(--ct-amber); border-color: var(--ct-amber); }
.ct-btn-flag:hover { background: var(--ct-amber); color: #fff; }
.ct-btn-flag.flagged { background: var(--ct-amber); color: #fff; }

/* =========================================================
   CARDS
   ========================================================= */
.ct-card {
    background: var(--ct-card);
    border: 1px solid var(--ct-border);
    border-radius: var(--r-lg);
    padding: var(--s6);
    box-shadow: var(--ct-shadow-sm);
}
.ct-card-hover {
    transition: transform var(--t-base), box-shadow var(--t-base);
}
.ct-card-hover:hover {
    transform: translateY(-3px);
    box-shadow: var(--ct-shadow);
}

/* =========================================================
   STATS BAR
   ========================================================= */
.ct-stats-bar {
    background: var(--ct-card);
    border-bottom: 1px solid var(--ct-border);
    padding: var(--s8) 0;
}
.ct-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--s6);
    text-align: center;
}
@media (min-width: 640px) { .ct-stats-grid { grid-template-columns: repeat(4, 1fr); } }
.ct-stat-number { font-size: 2rem; font-weight: 600; color: var(--ct-blue); display: block; line-height: 1; }
.ct-stat-label  { font-size: 0.82rem; color: var(--ct-muted); margin-top: var(--s1); display: block; }

/* =========================================================
   DOMAIN CARDS (sectional page)
   ========================================================= */
.ct-domain-card {
    background: var(--ct-card);
    border: 1px solid var(--ct-border);
    border-radius: var(--r-lg);
    padding: var(--s6);
    display: flex;
    flex-direction: column;
    gap: var(--s3);
    cursor: pointer;
    transition: all var(--t-base);
    text-decoration: none;
    color: var(--ct-text);
}
.ct-domain-card:hover { border-color: var(--ct-blue); box-shadow: var(--ct-shadow); transform: translateY(-2px); text-decoration: none; color: var(--ct-text); }

.ct-domain-icon {
    width: 44px; height: 44px;
    border-radius: var(--r-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
    color: #fff;
}
.ct-domain-percent {
    font-size: 0.75rem;
    color: var(--ct-muted);
    display: inline-block;
    padding: 2px 8px;
    background: var(--ct-bg);
    border-radius: var(--r-full);
    border: 1px solid var(--ct-border);
}
.ct-domain-bar-wrap { height: 5px; background: var(--ct-border); border-radius: var(--r-full); overflow: hidden; }
.ct-domain-bar-fill { height: 100%; border-radius: var(--r-full); }

/* =========================================================
   QUIZ ENGINE
   ========================================================= */
.ct-quiz-wrap {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--s6) var(--s6) var(--s16);
}

/* Quiz header bar */
.ct-quiz-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s4);
    flex-wrap: wrap;
    padding: var(--s4) var(--s5);
    background: var(--ct-card);
    border: 1px solid var(--ct-border);
    border-radius: var(--r-lg);
    margin-bottom: var(--s5);
    position: sticky;
    top: calc(var(--ct-header-h) + var(--s3));
    z-index: 100;
    box-shadow: var(--ct-shadow-sm);
}

/* Timer */
.ct-timer {
    display: inline-flex;
    align-items: center;
    gap: var(--s2);
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    font-size: 1rem;
    color: var(--ct-text);
    background: var(--ct-bg);
    padding: var(--s2) var(--s4);
    border-radius: var(--r-full);
    border: 1px solid var(--ct-border);
}
.ct-timer.warning { color: var(--ct-amber); border-color: var(--ct-amber); background: var(--ct-amber-lt); }
.ct-timer.danger  { color: var(--ct-red);   border-color: var(--ct-red);   background: var(--ct-red-lt); animation: ct-pulse 1s ease infinite; }

@keyframes ct-pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.6; } }

/* Progress text */
.ct-quiz-progress { font-size: 0.85rem; color: var(--ct-muted); }

/* Question card */
.ct-question-card {
    background: var(--ct-card);
    border: 1px solid var(--ct-border);
    border-radius: var(--r-lg);
    padding: var(--s6) var(--s8);
    margin-bottom: var(--s5);
    box-shadow: var(--ct-shadow-sm);
}
.ct-question-meta {
    display: flex;
    align-items: center;
    gap: var(--s3);
    margin-bottom: var(--s4);
    flex-wrap: wrap;
}
.ct-q-number {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--ct-blue);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.ct-q-type {
    font-size: 0.72rem;
    padding: 2px 8px;
    border-radius: var(--r-full);
    background: var(--ct-blue-lt);
    color: var(--ct-blue);
    border: 1px solid var(--ct-blue-md);
}
.ct-q-domain {
    font-size: 0.72rem;
    padding: 2px 8px;
    border-radius: var(--r-full);
    background: var(--ct-bg);
    color: var(--ct-muted);
    border: 1px solid var(--ct-border);
}
.ct-q-flagged-badge {
    font-size: 0.72rem;
    padding: 2px 8px;
    border-radius: var(--r-full);
    background: var(--ct-amber-lt);
    color: var(--ct-amber);
    border: 1px solid var(--ct-amber);
    display: none;
}
.ct-q-flagged-badge.show { display: inline-flex; align-items: center; gap: 4px; }

.ct-question-text {
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--ct-text);
    margin-bottom: var(--s5);
}

/* Answer options */
.ct-options { display: flex; flex-direction: column; gap: var(--s3); }

.ct-option {
    display: flex;
    align-items: flex-start;
    gap: var(--s3);
    padding: var(--s4) var(--s5);
    border: 2px solid var(--ct-border);
    border-radius: var(--r-md);
    cursor: pointer;
    transition: all var(--t-fast);
    background: var(--ct-card);
    text-align: left;
    width: 100%;
    font-family: var(--ct-font);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--ct-text);
}
.ct-option:hover:not(.disabled) { border-color: var(--ct-blue); background: var(--ct-blue-lt); }
.ct-option.selected { border-color: var(--ct-blue); background: var(--ct-blue-lt); }
.ct-option.correct  { border-color: var(--ct-green); background: var(--ct-green-lt); }
.ct-option.incorrect { border-color: var(--ct-red); background: var(--ct-red-lt); }
.ct-option.disabled { cursor: default; }

.ct-option-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 28px; height: 28px;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 6px;
    background: var(--ct-bg);
    border: 1px solid var(--ct-border);
    color: var(--ct-muted);
    transition: all var(--t-fast);
}
.ct-option.selected .ct-option-letter   { background: var(--ct-blue);  border-color: var(--ct-blue);  color: #fff; }
.ct-option.correct  .ct-option-letter   { background: var(--ct-green); border-color: var(--ct-green); color: #fff; }
.ct-option.incorrect .ct-option-letter  { background: var(--ct-red);   border-color: var(--ct-red);   color: #fff; }

.ct-option-text { flex: 1; }

/* Explanation box */
.ct-explanation {
    margin-top: var(--s5);
    padding: var(--s5);
    background: var(--ct-blue-lt);
    border-left: 4px solid var(--ct-blue);
    border-radius: 0 var(--r-md) var(--r-md) 0;
    display: none;
}
.ct-explanation.show { display: block; }
.ct-explanation h4 { color: var(--ct-blue); font-size: 0.9rem; margin-bottom: var(--s2); }
.ct-explanation p  { font-size: 0.92rem; line-height: 1.7; color: var(--ct-text); }
.ct-explanation a  { color: var(--ct-blue); font-size: 0.85rem; display: inline-flex; align-items: center; gap: 4px; margin-top: var(--s2); }

/* Quiz nav */
.ct-quiz-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s4);
    flex-wrap: wrap;
    margin-top: var(--s5);
}

/* Question Navigator grid */
.ct-nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(32px, 1fr));
    gap: 6px;
    margin-top: var(--s4);
}
.ct-nav-dot {
    width: 32px; height: 32px;
    border-radius: 6px;
    border: 1px solid var(--ct-border);
    background: var(--ct-bg);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--ct-muted);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    transition: all var(--t-fast);
}
.ct-nav-dot:hover { border-color: var(--ct-blue); color: var(--ct-blue); }
.ct-nav-dot.current { border-color: var(--ct-blue); background: var(--ct-blue); color: #fff; }
.ct-nav-dot.answered { border-color: var(--ct-green); background: var(--ct-green-lt); color: var(--ct-green); }
.ct-nav-dot.flagged  { border-color: var(--ct-amber); background: var(--ct-amber-lt); color: var(--ct-amber); }

/* Quiz layout – single column, no sidebar */
.ct-quiz-layout { display: block; max-width: 900px; margin: 0 auto; }

/* =========================================================
   RESULTS PAGE
   ========================================================= */
.ct-result-score-wrap {
    text-align: center;
    padding: var(--s10) 0;
}
.ct-score-donut {
    position: relative;
    display: inline-block;
    width: 180px; height: 180px;
    margin-bottom: var(--s6);
}
.ct-score-donut svg { width: 180px; height: 180px; transform: rotate(-90deg); }
.ct-score-donut circle { fill: none; stroke-width: 14; stroke-linecap: round; }
.ct-donut-bg     { stroke: var(--ct-border); }
.ct-donut-fill   { transition: stroke-dashoffset 1s ease; }
.ct-donut-pass   { stroke: var(--ct-green); }
.ct-donut-fail   { stroke: var(--ct-red); }
.ct-score-label {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.ct-score-big { font-size: 2.4rem; font-weight: 600; line-height: 1; }
.ct-score-denom { font-size: 0.8rem; color: var(--ct-muted); }

.ct-result-verdict {
    display: inline-flex;
    align-items: center;
    gap: var(--s2);
    padding: var(--s2) var(--s6);
    border-radius: var(--r-full);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--s4);
}
.ct-verdict-pass { background: var(--ct-green-lt); color: var(--ct-green); border: 1px solid var(--ct-green); }
.ct-verdict-fail { background: var(--ct-red-lt);   color: var(--ct-red);   border: 1px solid var(--ct-red); }

.ct-domain-results { display: flex; flex-direction: column; gap: var(--s3); margin: var(--s6) 0; }
.ct-domain-result-row { display: flex; flex-direction: column; gap: var(--s1); }
.ct-domain-result-label { display: flex; justify-content: space-between; font-size: 0.85rem; }
.ct-domain-result-bar { height: 8px; background: var(--ct-border); border-radius: var(--r-full); overflow: hidden; }
.ct-domain-result-fill { height: 100%; border-radius: var(--r-full); background: var(--ct-blue); transition: width 1s ease; }

/* Review accordion */
.ct-review-item {
    border: 1px solid var(--ct-border);
    border-radius: var(--r-lg);
    margin-bottom: var(--s4);
    overflow: hidden;
}
.ct-review-header {
    display: flex;
    align-items: center;
    gap: var(--s3);
    padding: var(--s4) var(--s5);
    cursor: pointer;
    background: var(--ct-card);
    border: none;
    width: 100%;
    text-align: left;
    font-family: var(--ct-font);
    font-size: 0.9rem;
    color: var(--ct-text);
}
.ct-review-header:hover { background: var(--ct-bg); }
.ct-review-body { padding: var(--s5); background: var(--ct-card); display: none; }
.ct-review-body.open { display: block; }

/* =========================================================
   MOCK EXAM GRID (practice.php)
   ========================================================= */
.ct-mock-grid { display: grid; gap: var(--s5); }
@media (min-width: 640px) { .ct-mock-grid { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 900px) { .ct-mock-grid { grid-template-columns: repeat(3,1fr); } }

.ct-mock-card {
    background: var(--ct-card);
    border: 1px solid var(--ct-border);
    border-radius: var(--r-lg);
    padding: var(--s6);
    display: flex;
    flex-direction: column;
    gap: var(--s3);
    transition: all var(--t-base);
    text-decoration: none;
    color: var(--ct-text);
}
.ct-mock-card:hover { border-color: var(--ct-blue); box-shadow: var(--ct-shadow); transform: translateY(-2px); text-decoration: none; color: var(--ct-text); }
.ct-mock-number { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ct-blue); }
.ct-mock-title  { font-size: 1.05rem; font-weight: 600; }
.ct-mock-meta   { font-size: 0.8rem; color: var(--ct-muted); display: flex; gap: var(--s3); flex-wrap: wrap; }

/* =========================================================
   AI FEEDBACK CARD
   ========================================================= */
.ct-ai-card {
    background: linear-gradient(135deg, var(--ct-navy-dk), var(--ct-navy));
    color: #fff;
    border-radius: var(--r-lg);
    padding: var(--s6);
    margin-bottom: var(--s6);
}
.ct-ai-card h3 { color: #fff; margin-bottom: var(--s4); }
.ct-ai-content { line-height: 1.8; color: rgba(255,255,255,0.87); }
.ct-ai-content strong { color: #fff; }
.ct-ai-content h4 { color: rgba(255,255,255,0.95); margin: var(--s4) 0 var(--s2); }

/* =========================================================
   FOOTER
   ========================================================= */
.ct-footer {
    background: #38373c;
    color: rgba(255,255,255,0.75);
    padding: var(--s16) 0 0;
    margin-top: var(--s20);
}
.ct-footer-grid {
    display: grid;
    gap: var(--s8);
    margin-bottom: var(--s12);
}
@media (min-width: 640px) { .ct-footer-grid { grid-template-columns: 1.5fr repeat(3,1fr); } }

.ct-footer .ct-logo-text { color: #fff; }
.ct-footer .ct-logo-icon { background: var(--ct-blue); }
.ct-footer-tagline { font-size: 0.85rem; margin-top: var(--s3); line-height: 1.7; }
.ct-footer-links h3 { color: rgba(255,255,255,0.55); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: var(--s4); }
.ct-footer-links ul { display: flex; flex-direction: column; gap: var(--s2); }
.ct-footer-links a { color: rgba(255,255,255,0.65); font-size: 0.88rem; text-decoration: none; transition: color var(--t-fast); }
.ct-footer-links a:hover { color: #fff; }
.ct-footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: var(--s5) 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s4);
    flex-wrap: wrap;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
}
.ct-footer-bottom-links { display: flex; gap: var(--s5); }
.ct-footer-bottom-links a { color: rgba(255,255,255,0.4); text-decoration: none; }
.ct-footer-bottom-links a:hover { color: rgba(255,255,255,0.7); }

/* =========================================================
   BACK TO TOP
   ========================================================= */
.ct-back-top {
    position: fixed;
    bottom: var(--s8);
    right: var(--s8);
    width: 44px; height: 44px;
    background: var(--ct-navy);
    color: #fff;
    border: none;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.9rem;
    box-shadow: var(--ct-shadow-lg);
    cursor: pointer;
    opacity: 0;
    transform: translateY(12px);
    transition: all var(--t-base);
    z-index: 200;
}
.ct-back-top.show { opacity: 1; transform: translateY(0); }
.ct-back-top:hover { background: var(--ct-blue); }

/* =========================================================
   DARK MODE TOGGLE
   ========================================================= */
.ct-theme-toggle {
    background: none;
    border: 1px solid var(--ct-border);
    border-radius: var(--r-full);
    padding: var(--s2) var(--s3);
    display: flex; align-items: center; gap: var(--s2);
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--ct-muted);
    transition: all var(--t-fast);
}
.ct-theme-toggle:hover { border-color: var(--ct-blue); color: var(--ct-blue); }

/* =========================================================
  UTILITY
   ========================================================= */
.ct-text-center { text-align: center; }
.ct-mt-4  { margin-top: var(--s4); }
.ct-mt-6  { margin-top: var(--s6); }
.ct-mt-8  { margin-top: var(--s8); }
.ct-mb-6  { margin-bottom: var(--s6); }

.ct-tag {
    display: inline-flex; align-items: center;
    padding: 2px 10px;
    border-radius: var(--r-full);
    font-size: 0.72rem; font-weight: 600;
    background: var(--ct-blue-lt); color: var(--ct-blue);
    border: 1px solid var(--ct-blue-md);
}

.ct-divider { height: 1px; background: var(--ct-border); margin: var(--s8) 0; }

h2.ct-section-title {
    font-size: clamp(1.3rem, 2.5vw, 1.8rem);
    font-weight: 600;
    color: var(--ct-text);
    margin-bottom: var(--s6);
    letter-spacing: -0.01em;
}

.ct-spinner {
    display: inline-block;
    width: 24px; height: 24px;
    border: 3px solid var(--ct-border);
    border-top-color: var(--ct-blue);
    border-radius: 50%;
    animation: ct-spin 0.7s linear infinite;
}
@keyframes ct-spin { to { transform: rotate(360deg); } }

/* Passing score threshold line annotation */
.ct-pass-note {
    display: inline-flex; align-items: center; gap: var(--s2);
    font-size: 0.8rem; color: var(--ct-muted);
    margin-top: var(--s2);
}

/* =========================================================
   RESPONSIVE OVERRIDES
   ========================================================= */
@media (max-width: 600px) {
    .ct-quiz-wrap { padding: var(--s4) var(--s4) var(--s16); }
    .ct-question-card { padding: var(--s5) var(--s4); }
    .ct-option { padding: var(--s3) var(--s4); font-size: 0.95rem; }
    .ct-hero { padding: var(--s16) 0 var(--s12); }
    .ct-btn { padding: 0.65rem 1.1rem; }
}

/* =========================================================
   MULTI-CHOICE STATUS BANNER
   ========================================================= */
.ct-multi-status {
    padding: 0.6rem 1rem;
    border-radius: var(--r-md);
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.75rem;
}
.ct-multi-warning {
    background: var(--ct-red-lt);
    color: var(--ct-red);
    border: 1px solid var(--ct-red);
}
.ct-multi-ok {
    background: var(--ct-green-lt);
    color: var(--ct-green);
    border: 1px solid var(--ct-green);
}

@keyframes ct-shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    50% { transform: translateX(6px); }
    75% { transform: translateX(-3px); }
}

@keyframes ct-spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}