/* ==========================================================================
   CertLab Theme — app.css
   Design system + all component styles
   ========================================================================== */

/* ─── Google Fonts fallback (also loaded in layout) ─── */
@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=Sora:wght@600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Protest+Guerrilla&family=Roboto:ital,wght@0,100..900;1,100..900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Paytone+One&display=swap');
/* ==========================================================================
   1. Design tokens
   ========================================================================== */
:root {
    /* Palette */
    --cl-blue:       #2553ff;
    --cl-blue-d:     #1a2f8f;
    --cl-blue-l:     #6d8cff;
    --cl-coral:      #f46c5f;
    --cl-coral-l:    rgba(244, 108, 95, 0.12);
    --cl-mint:       #8fe0d3;
    --cl-mint-l:     rgba(143, 224, 211, 0.18);
    --cl-gold:       #f5be6f;
    --cl-gold-l:     rgba(245, 190, 111, 0.16);

    /* Neutrals */
    --cl-ink:        #16202e;
    --cl-muted:      #56647a;
    --cl-border:     rgba(22, 32, 46, 0.09);
    --cl-bg:         #faf9f7;
    --cl-bg-warm:    #fff7f2;
    --cl-surface:    rgba(255, 255, 255, 0.72);
    --cl-surface-s:  rgba(255, 255, 255, 0.92);
    --cl-white:      #ffffff;

    /* Dark palette */
    --cl-dark:       #0f1724;
    --cl-dark-2:     #182033;
    --cl-dark-3:     #1e2a40;

    /* Shadows */
    --cl-shadow-sm:  0 4px 16px rgba(15, 23, 36, 0.08);
    --cl-shadow:     0 20px 60px rgba(15, 23, 36, 0.12);
    --cl-shadow-lg:  0 32px 90px rgba(15, 23, 36, 0.18);

    /* Radii */
    --cl-radius-xs:  8px;
    --cl-radius-sm:  14px;
    --cl-radius-md:  20px;
    --cl-radius-lg:  28px;
    --cl-radius-xl:  36px;
    --cl-radius-full: 9999px;

    /* Typography */
    --cl-font-body:  'Manrope', system-ui, sans-serif;
    --cl-font-head:  'Paytone One', system-ui, sans-serif;
    --cl-font-logo:  "Protest Guerrilla", sans-serif;

    /* Transitions */
    --cl-ease:       0.22s ease;
}

/* ==========================================================================
   2. Reset & base
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
    font-family: var(--cl-font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--cl-ink);
    background: var(--cl-bg);
    -webkit-font-smoothing: antialiased;
}

img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; -webkit-tap-highlight-color: transparent; }
button { font-family: inherit; cursor: pointer; border: none; background: none; -webkit-tap-highlight-color: transparent; }
ul, ol { list-style: none; }

/* ==========================================================================
   3. Layout helpers
   ========================================================================== */
.cl-shell {
    width: min(1360px, calc(100% - 32px));
    margin: 0 auto;
}
.cl-shell--narrow { max-width: min(1360px, calc(100% - 32px))}
.cl-shell--xs     { max-width: 500px; }

/* ==========================================================================
   4. Typography helpers
   ========================================================================== */
.cl-eyebrow {
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--cl-coral);
}

.cl-heading {
    font-family: var(--cl-font-head);
    font-size: clamp(1.9rem, 3.5vw, 3.2rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.06;
}

.cl-subhead {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--cl-muted);
    max-width: 62ch;
    margin-top: 14px;
}

.cl-gradient-text {
    background: linear-gradient(135deg, var(--cl-coral), var(--cl-blue));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* ==========================================================================
   5. Buttons
   ========================================================================== */
.cl-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 22px;
    border-radius: var(--cl-radius-full);
    font-family: var(--cl-font-body);
    font-weight: 800;
    font-size: 0.95rem;
    text-decoration: none;
    border: 1px solid transparent;
    transition: transform var(--cl-ease), box-shadow var(--cl-ease),
                background var(--cl-ease), border-color var(--cl-ease);
    white-space: nowrap;
}
.cl-btn:hover, .cl-btn:focus-visible { transform: translateY(-2px); }
.cl-btn:focus-visible { outline: 2px solid var(--cl-blue); outline-offset: 3px; }

.cl-btn--primary {
    color: #fff;
    background: linear-gradient(135deg, var(--cl-blue-d), var(--cl-blue) 70%, var(--cl-blue-l));
    box-shadow: 0 14px 28px rgba(37, 83, 255, 0.26);
}
.cl-btn--primary:hover { box-shadow: 0 20px 40px rgba(37, 83, 255, 0.36); }

.cl-btn--ghost {
    color: var(--cl-ink);
    background: var(--cl-surface);
    border-color: var(--cl-border);
}
.cl-btn--ghost:hover { background: var(--cl-white); }

.cl-btn--white {
    color: var(--cl-blue-d);
    background: #fff;
    border-color: transparent;
    box-shadow: var(--cl-shadow-sm);
}

.cl-btn--soft {
    color: #b6483d;
    background: var(--cl-coral-l);
    border-color: transparent;
}

.cl-btn--sm  { padding: 10px 18px; font-size: 0.88rem; }
.cl-btn--lg  { padding: 16px 28px; font-size: 1rem; }
.cl-btn--xs  { padding: 7px 14px; font-size: 0.82rem; }

/* ==========================================================================
   6. Pills / kickers
   ========================================================================== */
.cl-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: var(--cl-radius-full);
    background: var(--cl-coral-l);
    color: #b6483d;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.cl-kicker--mint  { background: var(--cl-mint-l);  color: #2a7d71; }
.cl-kicker--gold  { background: var(--cl-gold-l);  color: #8a5e0a; }
.cl-kicker--blue  { background: rgba(37,83,255,.1); color: var(--cl-blue-d); }

.cl-pill {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: var(--cl-radius-full);
    font-size: 0.88rem;
    font-weight: 700;
    background: rgba(255,255,255,.7);
    border: 1px solid var(--cl-border);
    color: var(--cl-muted);
    text-decoration: none;
    transition: background var(--cl-ease), color var(--cl-ease);
}
.cl-pill:hover    { background: #fff; color: var(--cl-ink); }
.cl-pill--active  { background: var(--cl-blue); color: #fff; border-color: var(--cl-blue); }

/* ==========================================================================
   7. Brand mark
   ========================================================================== */
.cl-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--cl-ink);
}
.cl-brand__mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--cl-blue-d), var(--cl-blue));
    color: #fff;
    font-family: var(--cl-font-head);
    font-size: 0.9rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    box-shadow: 0 12px 24px rgba(37, 83, 255, 0.26);
    flex-shrink: 0;
}
.cl-brand__title {
    display: block;
    /* font-family: var(--cl-font-head); */
    font-family: var(--cl-font-logo);
    font-size: 2rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}
.cl-brand__sub {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--cl-muted);
}
.cl-brand--sm .cl-brand__mark { width: 36px; height: 36px; font-size: 0.78rem; }
.cl-brand--lg .cl-brand__mark { width: 54px; height: 54px; font-size: 1.05rem; border-radius: 18px; }

/* ==========================================================================
   8. Navigation
   ========================================================================== */
.cl-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    /* padding: 16px 0 6px; */
    background: rgba(250, 249, 247, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.cl-nav__inner {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 18px;
    /* border-radius: var(--cl-radius-full);
    border: 1px solid rgba(255, 255, 255, 0.72);
    background: rgba(255, 255, 255, 0.56);
    box-shadow: 0 12px 36px rgba(37, 83, 255, 0.07); */
}

.cl-nav__links {
    display: flex;
    gap: 2px;
    flex-wrap: wrap;
    justify-content: center;
    flex: 1;
}

.cl-nav__link {
    padding: 8px 14px;
    border-radius: var(--cl-radius-full);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--cl-muted);
    text-decoration: none;
    transition: background var(--cl-ease), color var(--cl-ease);
}
.cl-nav__link:hover           { color: var(--cl-ink); background: rgba(255,255,255,.8); }
.cl-nav__link--active         { color: var(--cl-blue); background: rgba(37,83,255,.08); }

.cl-nav__actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.cl-nav__user {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--cl-muted);
}

.cl-nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    padding: 6px;
    border-radius: var(--cl-radius-xs);
    background: transparent;
}
.cl-nav__toggle span {
    display: block;
    height: 2px;
    width: 20px;
    background: var(--cl-ink);
    border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s;
}

/* ==========================================================================
   9. Exam top bar (exam layout)
   ========================================================================== */
.cl-exambar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,.92);
    border-bottom: 1px solid var(--cl-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}
.cl-exambar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 0;
}
.cl-exambar__timer {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--cl-radius-full);
    background: var(--cl-coral-l);
    color: #b6483d;
    font-weight: 800;
    font-size: 1rem;
}

/* ==========================================================================
   10. Sections
   ========================================================================== */
.cl-section         { padding: 72px 0; }
.cl-section--sm     { padding: 48px 0; }
.cl-section--lg     { padding: 100px 0; }
.cl-section--tinted {
    background: linear-gradient(180deg, #f0f4ff 0%, var(--cl-bg) 100%);
}
.cl-section--dark {
    background: var(--cl-dark);
    color: #fff;
}
.cl-section--dark .cl-eyebrow { color: var(--cl-mint); }
.cl-section--dark .cl-heading { color: #fff; }
.cl-section--dark .cl-subhead { color: rgba(255,255,255,.55); }

.cl-section__head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.cl-section__head--center {
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.cl-section__head--center .cl-subhead { margin-left: auto; margin-right: auto; }

/* ==========================================================================
   11. Hero section
   ========================================================================== */
.cl-hero {
    padding: 40px 0 60px;
    background:
        radial-gradient(circle at top left,  rgba(255,255,255,.95), transparent 22%),
        radial-gradient(circle at 88% 12%,   rgba(143,224,211,.32), transparent 18%),
        radial-gradient(circle at 72% 58%,   rgba(37,83,255,.1),   transparent 24%),
        linear-gradient(180deg, var(--cl-bg-warm) 0%, #fff1e6 34%, #f5f8ff 100%);
}

.cl-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
    gap: 32px;
    align-items: center;
}

.cl-hero__copy { display: flex; flex-direction: column; gap: 20px; }

.cl-hero__headline {
    font-family: var(--cl-font-head);
    font-size: clamp(3rem, 6.5vw, 5.8rem);
    font-weight: 800;
    letter-spacing: -0.05em;
    line-height: 0.94;
    color: var(--cl-ink);
}

.cl-hero__lead {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--cl-muted);
    max-width: 60ch;
}

.cl-hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding-top: 4px;
}

.cl-hero__stats {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding-top: 10px;
}

/* Hero right card */
.cl-hero__visual { position: relative; }

.cl-hero__card {
    position: relative;
    padding: 32px;
    border-radius: var(--cl-radius-xl);
    border: 1px solid rgba(255,255,255,.8);
    background: rgba(255,255,255,.82);
    box-shadow: var(--cl-shadow);
    backdrop-filter: blur(14px);
    animation: clFloat 7s ease-in-out infinite;
}

.cl-hero__card-header { margin-bottom: 14px; }

.cl-hero__card-title {
    font-family: var(--cl-font-head);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 4px;
}

.cl-hero__card-meta {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--cl-muted);
    margin-bottom: 16px;
}

.cl-hero__card-bars { display: flex; align-items: center; gap: 12px; }

.cl-hero__card-score {
    font-size: 0.82rem;
    font-weight: 800;
    color: var(--cl-muted);
    white-space: nowrap;
}

/* Floating badge */
.cl-hero__floater {
    position: absolute;
    top: -16px;
    right: -16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 20px;
    border-radius: var(--cl-radius-md);
    background: linear-gradient(135deg, var(--cl-blue-d), var(--cl-blue));
    color: #fff;
    box-shadow: 0 16px 32px rgba(37, 83, 255, 0.32);
    font-size: 0.8rem;
    font-weight: 800;
}
.cl-hero__floater i  { font-size: 1.4rem; margin-bottom: 4px; }
.cl-hero__floater strong { font-size: 1.6rem; font-weight: 800; line-height: 1; }

/* ==========================================================================
   12. Stats bar
   ========================================================================== */
.cl-stats-bar {
    background: linear-gradient(135deg, var(--cl-coral), var(--cl-blue));
    padding: 0;
}
.cl-stats-bar__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 24px 0;
}
.cl-stats-bar__item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 32px;
}
.cl-stats-bar__item strong {
    font-family: var(--cl-font-head);
    font-size: 1.6rem;
    font-weight: 800;
    color: #fff;
}
.cl-stats-bar__item span {
    font-size: 0.82rem;
    font-weight: 700;
    color: rgba(255,255,255,.5);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.cl-stats-bar__divider {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,.1);
}

/* ==========================================================================
   13. Stat pills
   ========================================================================== */
.cl-stat-pill {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    border-radius: var(--cl-radius-md);
    background: rgba(255,255,255,.8);
    border: 1px solid var(--cl-border);
}
.cl-stat-pill strong {
    font-family: var(--cl-font-head);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--cl-ink);
}
.cl-stat-pill span {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--cl-muted);
    line-height: 1.3;
}

/* ==========================================================================
   14. Features grid
   ========================================================================== */
.cl-features-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.cl-feature-card {
    padding: 28px 26px;
    border-radius: var(--cl-radius-lg);
    border: 1px solid var(--cl-border);
    background: var(--cl-surface);
    transition: transform var(--cl-ease), box-shadow var(--cl-ease);
}
.cl-feature-card:hover { transform: translateY(-4px); box-shadow: var(--cl-shadow); }

.cl-feature-card__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: var(--cl-radius-sm);
    margin-bottom: 18px;
    font-size: 1.3rem;
}

.cl-feature-card--blue  .cl-feature-card__icon { background: rgba(37,83,255,.12); color: var(--cl-blue); }
.cl-feature-card--coral .cl-feature-card__icon { background: var(--cl-coral-l); color: var(--cl-coral); }
.cl-feature-card--mint  .cl-feature-card__icon { background: var(--cl-mint-l); color: #2a7d71; }
.cl-feature-card--gold  .cl-feature-card__icon { background: var(--cl-gold-l); color: #8a5e0a; }

.cl-feature-card__title {
    font-family: var(--cl-font-head);
    font-size: 1.05rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.cl-feature-card__desc {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--cl-muted);
}

/* ==========================================================================
   15. Certification cards grid
   ========================================================================== */
.cl-certs-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}
.cl-certs-grid--full {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.cl-cert-card {
    display: flex;
    flex-direction: column;
    border-radius: var(--cl-radius-xl);
    border: 1px solid var(--cl-border);
    background: #fff;
    overflow: hidden;
    text-decoration: none;
    color: var(--cl-ink);
    transition: transform var(--cl-ease), box-shadow var(--cl-ease);
    box-shadow: var(--cl-shadow-sm);
    will-change: transform;
}
.cl-cert-card:hover { transform: translateY(-6px); box-shadow: var(--cl-shadow); }

.cl-cert-card__thumb {
    position: relative;
    height: 180px;
    overflow: hidden;
    background: linear-gradient(135deg, #eef1ff, #f0f6f5);
    border-top-left-radius: var(--cl-radius-xl);
    border-top-right-radius: var(--cl-radius-xl);
}
.cl-cert-card__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    
}


.cl-cert-card__thumb-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: rgba(37, 83, 255, 0.2);
}

.cl-cert-card__badge {
    position: absolute;
    bottom: 12px;
    right: 12px;
    padding: 6px 12px;
    border-radius: var(--cl-radius-full);
    background: rgba(37, 83, 255, 0.85);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 800;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.2s, transform 0.2s;
    backdrop-filter: blur(6px);
}
.cl-cert-card:hover .cl-cert-card__badge { opacity: 1; transform: translateY(0); }

/* Color accents on top border */
.cl-cert-card--blue  { border-top: 3px solid var(--cl-blue); }
.cl-cert-card--coral { border-top: 3px solid var(--cl-coral); }
.cl-cert-card--mint  { border-top: 3px solid var(--cl-mint); }
.cl-cert-card--gold  { border-top: 3px solid var(--cl-gold); }

.cl-cert-card__body {
    padding: 20px 22px 22px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cl-cert-card__title {
    font-family: var(--cl-font-head);
    font-size: 1.05rem;
    font-weight: 500;
    letter-spacing: -0.02em;
}

.cl-cert-card__desc {
    font-size: 0.88rem;
    line-height: 1.6;
    color: var(--cl-muted);
}

.cl-cert-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--cl-muted);
    margin-top: auto;
    padding-top: 8px;
}
.cl-cert-card__meta i { color: var(--cl-blue); }

/* ==========================================================================
   16. How-it-works steps
   ========================================================================== */
.cl-steps {
    display: flex;
    align-items: flex-start;
    gap: 0;
    flex-wrap: wrap;
}

.cl-step {
    flex: 1;
    min-width: 200px;
    padding: 28px 24px;
    border-radius: var(--cl-radius-lg);
    border: 1px solid var(--cl-border);
    background: var(--cl-surface);
}

.cl-step__num {
    font-family: var(--cl-font-head);
    font-size: 2.6rem;
    font-weight: 800;
    color: rgba(37, 83, 255, 0.15);
    margin-bottom: 14px;
    letter-spacing: -0.06em;
}

.cl-step h3 {
    font-family: var(--cl-font-head);
    font-size: 1.05rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.cl-step p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--cl-muted);
}

.cl-step__arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 12px;
    color: var(--cl-muted);
    font-size: 1.2rem;
    align-self: center;
}

/* ==========================================================================
   17. CTA section
   ========================================================================== */
.cl-cta {
    padding: 80px 0;
    background: var(--cl-dark);
    position: relative;
    overflow: hidden;
}

.cl-cta__inner {
    position: relative;
    z-index: 1;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 22px;
}

.cl-cta__headline {
    font-family: var(--cl-font-head);
    font-size: clamp(2rem, 4vw, 3.6rem);
    font-weight: 800;
    letter-spacing: -0.05em;
    color: #fff;
    line-height: 1.05;
    max-width: 14ch;
}

.cl-cta__lead {
    font-size: 1.05rem;
    line-height: 1.8;
    color: rgba(255,255,255,.55);
    max-width: 58ch;
}

.cl-cta__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: center;
}

.cl-cta__glow {
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 999px;
    pointer-events: none;
    filter: blur(80px);
    opacity: 0.25;
}
.cl-cta__glow--left  { left: -100px; bottom: -100px; background: var(--cl-blue); }
.cl-cta__glow--right { right: -100px; top: -100px;  background: var(--cl-coral); }

/* ==========================================================================
   18. Page heroes
   ========================================================================== */
.cl-page-hero {
    padding: 56px 0 48px;
    background:
        radial-gradient(circle at 80% 20%, rgba(143,224,211,.2), transparent 28%),
        linear-gradient(180deg, #fff 0%, #f5f8ff 60%, var(--cl-bg) 100%);
}

.cl-page-hero--sm  { padding: 40px 0 32px; }

.cl-page-hero--dark {
    background: var(--cl-dark);
    padding: 60px 0 50px;
}

.cl-page-hero--exams {
    background:
        radial-gradient(circle at 10% 90%, rgba(37,83,255,.08), transparent 30%),
        radial-gradient(circle at 90% 10%, rgba(244,108,95,.1), transparent 28%),
        linear-gradient(180deg, #fff 0%, #f5f8ff 100%);
}

.cl-page-hero__inner {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.cl-page-hero__heading {
    font-family: var(--cl-font-head);
    font-size: clamp(2.4rem, 5vw, 3rem);
    font-weight: 500;
    letter-spacing: -0.05em;
    line-height: 1.0;
    color: var(--cl-ink);
    margin: 8px 0;
}
.cl-page-hero__heading--light { color: #fff; }

.cl-page-hero__lead {
    font-size: 1rem;
    color: var(--cl-muted);
}
.cl-page-hero__lead--muted { color: rgba(255,255,255,.55); }

.cl-page-hero__stats {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 8px;
}

/* ==========================================================================
   19. Marquee
   ========================================================================== */
.cl-marquee {
    overflow: hidden;
    padding: 16px 0;
    background: linear-gradient(135deg, var(--cl-coral), var(--cl-blue));
}
.cl-marquee__track {
    display: flex;
    white-space: nowrap;
    animation: clMarquee 26s linear infinite;
}
.cl-marquee__track span {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 0 24px;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,.45);
}
.cl-marquee__track span::after {
    content: "·";
    color: var(--cl-coral);
    font-size: 1.2rem;
}

/* ==========================================================================
   20. Featured exam block
   ========================================================================== */
.cl-featured-exam {
    display: flex;
    align-items: center;
    gap: 26px;
    padding: 28px 32px;
    border-radius: var(--cl-radius-xl);
    border: 1px solid var(--cl-border);
    background: rgba(255,255,255,.86);
    box-shadow: var(--cl-shadow-sm);
    position: relative;
    flex-wrap: wrap;
}

.cl-featured-exam__badge {
    position: absolute;
    top: -12px;
    left: 28px;
    padding: 5px 14px;
    border-radius: var(--cl-radius-full);
    background: linear-gradient(135deg, var(--cl-coral), #f08a45);
    color: #fff;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.cl-featured-exam__body { flex: 1; min-width: 200px; }

.cl-featured-exam__title {
    font-family: var(--cl-font-head);
    font-size: 1.6rem;
    font-weight: 500;
    letter-spacing: -0.03em;
    margin: 6px 0 8px;
}

.cl-featured-exam__desc {
    font-size: 0.9rem;
    color: var(--cl-muted);
    line-height: 1.7;
}

.cl-featured-exam__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 10px;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--cl-muted);
}
.cl-featured-exam__meta i { color: var(--cl-blue); }

/* ==========================================================================
   21. Exam format cards
   ========================================================================== */
.cl-formats-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.cl-format-card {
    position: relative;
    overflow: hidden;
    padding: 28px 24px;
    border-radius: var(--cl-radius-xl);
    border: 1px solid rgba(255,255,255,.15);
    background: rgba(255,255,255,.06);
    color: #fff;
    text-decoration: none;
    transition: transform var(--cl-ease), box-shadow var(--cl-ease), background var(--cl-ease);
}
.cl-format-card:hover {
    transform: translateY(-6px);
    background: rgba(255,255,255,.12);
    box-shadow: 0 28px 60px rgba(0,0,0,.3);
}

.cl-format-card__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: var(--cl-radius-sm);
    margin-bottom: 16px;
    font-size: 1.2rem;
}

.cl-format-card__tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: var(--cl-radius-full);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.cl-format-card h3 {
    font-family: var(--cl-font-head);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 8px;
}

.cl-format-card p {
    font-size: 0.88rem;
    line-height: 1.7;
    color: rgba(255,255,255,.55);
}

/* body-text wrapper — transparent on desktop, used for flex layout on mobile */
.cl-format-card__body-text { display: contents; }

.cl-format-card--blue  .cl-format-card__icon { background: rgba(109,140,255,.2); color: var(--cl-blue-l); }
.cl-format-card--blue  .cl-format-card__tag  { background: rgba(37,83,255,.2); color: var(--cl-blue-l); }

.cl-format-card--coral .cl-format-card__icon { background: rgba(244,108,95,.15); color: var(--cl-coral); }
.cl-format-card--coral .cl-format-card__tag  { background: rgba(244,108,95,.15); color: var(--cl-coral); }

.cl-format-card--mint  .cl-format-card__icon { background: rgba(143,224,211,.15); color: var(--cl-mint); }
.cl-format-card--mint  .cl-format-card__tag  { background: rgba(143,224,211,.15); color: var(--cl-mint); }

/* ==========================================================================
   22. Filter bar
   ========================================================================== */
.cl-filter-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}
.cl-filter-bar__label {
    font-size: 0.82rem;
    font-weight: 800;
    color: var(--cl-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    white-space: nowrap;
}
.cl-filter-bar__pills { display: flex; flex-wrap: wrap; gap: 8px; }

/* ==========================================================================
   23. Exam setup card
   ========================================================================== */
.cl-exam-setup-card {
    padding: 36px;
    border-radius: var(--cl-radius-xl);
    border: 1px solid var(--cl-border);
    background: #fff;
    box-shadow: var(--cl-shadow-sm);
}

/* ==========================================================================
   24. Auth page
   ========================================================================== */
.cl-auth-page {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    padding: 60px 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(37,83,255,.08), transparent 26%),
        linear-gradient(180deg, #fff 0%, #f5f8ff 100%);
}

.cl-auth-page__brand {
    text-align: center;
    margin-bottom: 32px;
    display: flex;
    justify-content: center;
}

.cl-auth-card {
    background: #fff;
    border-radius: var(--cl-radius-xl);
    border: 1px solid var(--cl-border);
    box-shadow: var(--cl-shadow);
    overflow: hidden;
}

.cl-auth-tabs {
    display: flex;
    border-bottom: 1px solid var(--cl-border);
}

.cl-auth-tab {
    flex: 1;
    padding: 16px;
    font-family: var(--cl-font-body);
    font-size: 0.9rem;
    font-weight: 800;
    color: var(--cl-muted);
    border: none;
    background: none;
    cursor: pointer;
    transition: color var(--cl-ease), border-bottom var(--cl-ease);
    border-bottom: 3px solid transparent;
    margin-bottom: -1px;
}
.cl-auth-tab:hover { color: var(--cl-ink); }
.cl-auth-tab--active { color: var(--cl-blue); border-bottom-color: var(--cl-blue); }

.cl-auth-panel { padding: 30px; }
.cl-auth-panel--hidden { display: none; }

.cl-auth-heading {
    font-family: var(--cl-font-head);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 6px;
}

.cl-auth-sub {
    font-size: 0.9rem;
    color: var(--cl-muted);
    margin-bottom: 24px;
}

.cl-auth-page__back {
    text-align: center;
    margin-top: 20px;
    font-size: 0.88rem;
    font-weight: 700;
}
.cl-auth-page__back a {
    color: var(--cl-muted);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color var(--cl-ease);
}
.cl-auth-page__back a:hover { color: var(--cl-blue); }

/* ==========================================================================
   25. Error page (404)
   ========================================================================== */
.cl-error-page {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 0;
    text-align: center;
}

.cl-error-page__code {
    font-family: var(--cl-font-head);
    font-size: clamp(6rem, 18vw, 14rem);
    font-weight: 800;
    letter-spacing: -0.08em;
    line-height: 0.85;
    color: rgba(37, 83, 255, 0.1);
    margin-bottom: 16px;
}

.cl-error-page__heading {
    font-family: var(--cl-font-head);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.04em;
    margin-bottom: 12px;
}

.cl-error-page__lead {
    font-size: 1rem;
    color: var(--cl-muted);
    max-width: 50ch;
    margin: 0 auto 30px;
    line-height: 1.8;
}

.cl-error-page__actions {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================================================
   26. Footer
   ========================================================================== */
.cl-footer {
    background: var(--cl-dark);
    color: rgba(255,255,255,.6);
    padding: 60px 0 30px;
}

.cl-footer__top {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,.08);
    margin-bottom: 24px;
}

.cl-footer__brand .cl-brand { margin-bottom: 16px; }
.cl-footer__brand .cl-brand__title,
.cl-footer__brand .cl-brand__sub { color: rgba(255,255,255,.7); }

.cl-footer__tagline {
    font-size: 0.88rem;
    line-height: 1.8;
    color: rgba(255,255,255,.4);
    max-width: 42ch;
}

.cl-footer__nav {
    display: flex;
    gap: 48px;
    flex-wrap: wrap;
}

.cl-footer__col h4,
.cl-footer__heading {
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255,255,255,.35);
    margin-bottom: 16px;
}

.cl-footer__col ul { display: flex; flex-direction: column; gap: 10px; }
.cl-footer__col a {
    font-size: 0.9rem;
    color: rgba(255,255,255,.5);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--cl-ease);
}
.cl-footer__col a:hover { color: #fff; }

.cl-footer__contact-link {
    display: flex;
    align-items: center;
    gap: 10px;
}
.cl-footer__icon-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 8px;
    flex-shrink: 0;
    transition: background var(--cl-ease), transform var(--cl-ease);
}
.cl-footer__icon-wrap svg {
    width: 14px;
    height: 14px;
    display: block;
}
.cl-footer__icon-wrap--email {
    background: rgba(37,83,255,.15);
    color: rgba(37,83,255,.9);
}
.cl-footer__icon-wrap--fb {
    background: rgba(24,119,242,.15);
    color: rgba(24,119,242,.9);
}
.cl-footer__contact-link:hover .cl-footer__icon-wrap--email {
    background: rgba(37,83,255,.28);
    transform: scale(1.08);
}
.cl-footer__contact-link--fb:hover .cl-footer__icon-wrap--fb {
    background: rgba(24,119,242,.28);
    transform: scale(1.08);
}
.cl-footer__contact-link--fb:hover { color: #5b9bf8; }

.cl-footer__bottom {
    font-size: 0.82rem;
    color: rgba(255,255,255,.25);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}

/* ==========================================================================
   27. Progress bar
   ========================================================================== */
.cl-progress-bar {
    flex: 1;
    height: 8px;
    border-radius: var(--cl-radius-full);
    background: rgba(37,83,255,.1);
    overflow: hidden;
}
.cl-progress-bar__fill {
    height: 100%;
    border-radius: var(--cl-radius-full);
    background: linear-gradient(90deg, var(--cl-blue-d), var(--cl-blue));
    transition: width 0.4s ease;
}

/* ==========================================================================
   28. Empty state
   ========================================================================== */
.cl-empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--cl-muted);
}
.cl-empty-state i {
    font-size: 3rem;
    display: block;
    margin-bottom: 16px;
    opacity: 0.4;
}
.cl-empty-state h3 {
    font-family: var(--cl-font-head);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--cl-ink);
    margin-bottom: 8px;
}
.cl-empty-state p { font-size: 0.9rem; }

/* ==========================================================================
   29. Keyframe animations
   ========================================================================== */
@keyframes clFloat {
    0%, 100% { transform: translateY(0);    }
    50%       { transform: translateY(-12px); }
}

@keyframes clRise {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes clMarquee {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

/* ==========================================================================
   30. Body variants
   ========================================================================== */
.cl-body { }

.cl-body--exam #cl-footer { display: none; }

/* ==========================================================================
   31. Responsive
   ========================================================================== */
@media (max-width: 1024px) {
    .cl-hero__grid    { grid-template-columns: 1fr; }
    .cl-hero__visual  { display: none; }
    .cl-features-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .cl-certs-grid    { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .cl-formats-grid  { grid-template-columns: 1fr; gap: 14px; }
    .cl-footer__top   { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 768px) {
    .cl-section       { padding: 48px 0; }
    .cl-features-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .cl-certs-grid    { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .cl-steps         { flex-direction: column; }
    .cl-step__arrow   { transform: rotate(90deg); }
    .cl-stats-bar__inner   { flex-direction: row; flex-wrap: nowrap; padding: 18px 0; }
    .cl-stats-bar__divider  { display: none; }
    .cl-stats-bar__item     { flex: 1; flex-direction: column; align-items: center;
                               text-align: center; padding: 10px 6px; gap: 3px;
                               border-right: 1px solid rgba(255,255,255,.14); }
    .cl-stats-bar__item:last-child { border-right: none; }
    .cl-stats-bar__item strong { font-size: 1.45rem; }
    .cl-stats-bar__item span   { font-size: 0.68rem; letter-spacing: 0.06em; }
    .cl-footer__nav   { flex-direction: column; gap: 24px; }

    .cl-nav__links    { display: none; }
    .cl-nav__toggle   { display: flex; }
    .cl-nav__actions  { margin-left: auto; }

    /* Mobile nav open state */
    .cl-nav--open .cl-nav__links {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 16px;
        right: 16px;
        background: #fff;
        border-radius: var(--cl-radius-lg);
        box-shadow: var(--cl-shadow);
        padding: 16px;
        border: 1px solid var(--cl-border);
    }

    /* Filter bar stacks vertically */
    .cl-filter-bar { flex-direction: column; align-items: flex-start; }

    /* Footer bottom row stacks */
    .cl-footer__bottom { flex-direction: column; align-items: center; text-align: center; }

    /* Featured exam — reduce padding for narrow screens */
    .cl-featured-exam { padding: 28px 16px 20px; }
    .cl-featured-exam__title { font-size: 1.35rem; }

    /* Cert card — compact for 2-col layout */
    .cl-cert-card__thumb   { height: 130px; }
    .cl-cert-card__body    { padding: 14px 14px 16px; gap: 6px; }
    .cl-cert-card__title   { font-size: 0.92rem; }
    .cl-cert-card__desc    { font-size: 0.8rem; line-height: 1.5; }
    .cl-cert-card__meta    { font-size: 0.75rem; gap: 8px; padding-top: 4px; }

    /* Feature card — compact for 2-col layout */
    .cl-feature-card        { padding: 20px 16px; }
    .cl-feature-card__icon  { width: 44px; height: 44px; font-size: 1.1rem; margin-bottom: 12px; }
    .cl-feature-card__title { font-size: 0.95rem; }
    .cl-feature-card__desc  { font-size: 0.82rem; line-height: 1.6; }

    /* Section head — stack heading + action button */
    .cl-section__head:not(.cl-section__head--center) { flex-direction: column; gap: 12px; }

    /* Hero stat pills — compact */
    .cl-stat-pill         { padding: 8px 12px; }
    .cl-stat-pill strong  { font-size: 1.2rem; }
    .cl-stat-pill span    { font-size: 0.74rem; }

    /* Format cards (training mode) — horizontal row layout on mobile */
    .cl-formats-grid { gap: 10px; }
    .cl-format-card {
        display: flex;
        flex-direction: row;
        align-items: flex-start;
        padding: 16px 18px;
        gap: 16px;
    }
    .cl-format-card__icon {
        width: 44px;
        height: 44px;
        flex-shrink: 0;
        margin-bottom: 0;
        font-size: 1.1rem;
        border-radius: var(--cl-radius-xs);
        align-self: center;
    }
    .cl-format-card__body-text { display: block; flex: 1; }
    .cl-format-card__tag   { margin-bottom: 5px; font-size: 0.65rem; }
    .cl-format-card h3     { font-size: 1rem; margin-bottom: 4px; }
    .cl-format-card p      { font-size: 0.82rem; line-height: 1.55; }

}

@media (max-width: 480px) {
    .cl-hero__headline { font-size: 3rem; }
    .cl-heading        { font-size: 1.8rem; }
    .cl-page-hero__heading { font-size: 2.2rem; }
    .cl-cta__headline  { font-size: 2rem; }
    .cl-btn--lg        { padding: 14px 22px; font-size: 0.95rem; }
}

/* ==========================================================================
   32. Mobile — iPhone 12/13/14/15/16/17 (390–430 px)
   ========================================================================== */
@media (max-width: 430px) {

    /* ── Shell ─────────────────────────────────────────────────── */
    .cl-shell,
    .cl-shell--narrow { width: calc(100% - 24px); }

    /* ── Nav ───────────────────────────────────────────────────── */
    .cl-nav { padding: 10px 0 4px; }
    .cl-nav__inner { padding: 8px 12px; gap: 10px; }
    .cl-nav__actions { gap: 6px; }
    .cl-nav__actions .cl-btn--sm { padding: 8px 12px; font-size: 0.8rem; }
    .cl-nav__user { font-size: 0.8rem; max-width: 100px; overflow: hidden;
                    white-space: nowrap; text-overflow: ellipsis; }

    /* ── Page hero ─────────────────────────────────────────────── */
    .cl-page-hero        { padding: 28px 0 20px; }
    .cl-page-hero--sm    { padding: 24px 0 16px; }
    .cl-page-hero__heading { font-size: 1.7rem; margin: 4px 0; }
    .cl-page-hero__lead  { font-size: 0.88rem; }

    /* ── Sections ───────────────────────────────────────────────── */
    .cl-section    { padding: 32px 0; }
    .cl-section--sm { padding: 24px 0; }

    /* ── Cert cards ─────────────────────────────────────────────── */
    .cl-certs-grid    { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
    .cl-features-grid { gap: 10px; }
    .cl-cert-card__thumb { height: 100px; }
    .cl-cert-card__desc  { display: none; }

    /* ── Hero lead ──────────────────────────────────────────────── */
    .cl-hero__lead { font-size: 0.9rem; }

    /* ── CTA actions — stack full-width on phone ────────────────── */
    .cl-cta__actions { flex-direction: column; align-items: stretch; }

    /* ── Auth card ──────────────────────────────────────────────── */
    .cl-auth-panel { padding: 20px 16px; }
    .cl-auth-tab   { padding: 13px 8px; font-size: 0.82rem; }

    /* ── Touch targets (iOS minimum 44px) ───────────────────────── */
    .cl-btn { font-size: 0.88rem; padding: 11px 18px; min-height: 44px; }
    .cl-btn--primary { font-size: 0.9rem; }

    /* ── Hero ──────────────────────────────────────────────────── */
    .cl-hero               { padding: 28px 0 36px; }
    .cl-hero__headline     { font-size: 2.6rem; }
    .cl-hero__actions      { flex-direction: column; }
    .cl-hero__actions .cl-btn { width: 100%; }
    .cl-hero__stats        { gap: 8px; }

    /* ── Featured exam ──────────────────────────────────────────── */
    .cl-featured-exam         { padding: 28px 14px 20px; gap: 12px; }
    .cl-featured-exam__title  { font-size: 1.2rem; }
    .cl-featured-exam__meta   { gap: 10px; }

    /* ── Exam setup card ────────────────────────────────────────── */
    .cl-exam-setup-card { padding: 20px 14px; }

    /* ── CTA ────────────────────────────────────────────────────── */
    .cl-cta { padding: 48px 0; }

    /* ── Footer ─────────────────────────────────────────────────── */
    .cl-footer { padding: 36px 0 20px; }

    /* ── Stats bar ──────────────────────────────────────────────── */
    .cl-stats-bar__item strong { font-size: 1.25rem; }
    .cl-stats-bar__item span   { font-size: 0.62rem; }

    /* ── Section heads ──────────────────────────────────────────── */
    .cl-section__head { margin-bottom: 24px; }

    /* ── Dark page hero (Leaderboard) ──────────────────────────── */
    .cl-page-hero--dark { padding: 36px 0 28px; }

    /* ── Exam bar ───────────────────────────────────────────────── */
    .cl-exambar__inner  { gap: 8px; padding: 10px 0; }
    .cl-exambar__timer  { padding: 8px 14px; font-size: 0.88rem; }
    .cl-exambar .cl-brand__title { font-size: 1.3rem; }
    .cl-exambar__exit { display: none; }
}

/* ==========================================================================
   33. Exam runner — single-viewport layout (≤ 768 px)
   ========================================================================== */

/* "Nộp bài" button injected into exambar — hidden on desktop */
.er-mobile-finish {
    display: none;
    background: linear-gradient(135deg, #7f0000, #c62828);
    color: #fff;
    box-shadow: 0 4px 14px rgba(198,40,40,.22);
    border: none;
}
.er-mobile-finish:hover { opacity: .88; }

@media (max-width: 768px) {
    /* Body fills exactly the visible screen — no outer scroll */
    .cl-body--exam {
        height: 100dvh;
        overflow: hidden;
        display: flex;
        flex-direction: column;
    }
    /* Exambar no longer needs sticky — it's the first flex child */
    .cl-body--exam .cl-exambar { flex-shrink: 0; position: relative; top: auto; }
    /* Main fills the rest of the screen */
    .cl-body--exam #cl-main {
        flex: 1;
        min-height: 0;
        overflow: hidden;
        display: flex;
        flex-direction: column;
    }
    /* Show Nộp bài in the exambar */
    .er-mobile-finish { display: inline-flex; }
    /* Hide Exit button on mobile */
    .cl-exambar__exit { display: none; }
}

/* ==========================================================================
   34. Safe-area insets — iPhone notch / Dynamic Island / home indicator
   Requires viewport-fit=cover in the meta viewport tag.
   ========================================================================== */
@supports (padding: env(safe-area-inset-top)) {
    /* Push nav below the status bar / notch */
    #cl-header {
        padding-top: env(safe-area-inset-top);
    }

    /* Exam layout: exambar absorbs the notch */
    .cl-body--exam .cl-exambar {
        padding-top: env(safe-area-inset-top);
    }

    /* Footer: clear the home-indicator bar at the bottom */
    .cl-footer {
        padding-bottom: calc(30px + env(safe-area-inset-bottom));
    }

    /* Exam body: prevent question content hiding behind the home indicator */
    .cl-body--exam {
        padding-bottom: env(safe-area-inset-bottom);
    }
}