/* ============================================================
   BTEC Level 3 International in Business — English Version
   ITS Education Asia
   - Montserrat 800 headings, Poppins body
   - ITS brand palette: #0067AC / #003A63 / #CEA82C
   - White content cards with subtle border + shadow
   - Flat-colour KF cards (no gradients)
   - Key Facts grid: exactly 3 columns on desktop
   ============================================================ */

/* ── CSS Variables ──────────────────────────────────────────── */
:root {
    --blue:       #0067AC;
    --dark-blue:  #003A63;
    --light-blue: #00A4E4;
    --gold:       #CEA82C;
    --orange:     #CC4E00;
    --teal:       #168CA1;
    --green:      #01A355;
    --purple:     #6B1FAD;
    --tint:       #E6F4FC;
    --ink:        #2b2f33;
    --grey:       #5b6168;
    --border:     #e8eef6;
    --shadow-sm:  0 1px 4px rgba(0,58,99,0.06);
}

/* ── Hero Section ───────────────────────────────────────────── */
#hero-section {
    position: relative;
    /* min-height: 420px; */
    display: flex;
    align-items: center;
    background: linear-gradient(170deg, #005a9a 0%, var(--dark-blue) 100%);
    border-bottom: 4px solid var(--gold);
    color: #fff;
    text-align: left;
    padding: 44px 0 50px;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0,58,99,0.18), rgba(0,58,99,0.55));
    pointer-events: none;
}

#hero-content {
    position: relative;
    z-index: 2;
    max-width: 780px;
    margin: 0;
}

#hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: rgba(206,168,44,0.15);
    border: 1px solid rgba(206,168,44,0.5);
    color: var(--gold);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 6px 18px;
    border-radius: 30px;
    margin-bottom: 14px;
}

#hero-content h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 10px;
    color: #fff;
}

#hero-content h2 {
    font-family: 'Poppins', sans-serif;
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    font-weight: 400;
    color: rgba(255,255,255,0.88);
    margin-bottom: 22px;
}

#hero-actions {
    display: flex;
    gap: 14px;
    justify-content: flex-start;
    flex-wrap: wrap;
}

#hero-actions .btn {
    padding: 12px 28px;
    font-size: 0.93rem;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.25s;
    font-family: 'Poppins', sans-serif;
}

#hero-actions .btn-outline {
    background: transparent;
    border: 2px solid rgba(255,255,255,0.75);
    color: #fff;
}

#hero-actions .btn-outline:hover {
    background: rgba(255,255,255,0.12);
    border-color: #fff;
}

#hero-actions .btn-primary {
    background: #00A4E4;
    border-color: #00A4E4;
    color: #fff;
}

#hero-actions .btn-primary:hover {
    background: #0089c4;
    border-color: #0089c4;
}

/* ── Page Nav (sticky) ──────────────────────────────────────── */
#page-nav {
    background: #fff;
    border-bottom: 1px solid #d0deee;
    position: sticky;
    top: 55px;
    z-index: 900;
    box-shadow: 0 2px 8px rgba(0,58,99,0.06);
    overflow: hidden;
}

#page-nav-links {
    list-style: none;
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    gap: 0;
    padding: 0;
    margin: 0;
}

#page-nav-links::-webkit-scrollbar { display: none; }

#page-nav-links li a {
    display: block;
    padding: 13px 18px;
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--grey);
    font-family: 'Poppins', sans-serif;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
    transition: color 0.2s, border-color 0.2s;
    text-decoration: none !important;
}

#page-nav-links li a:hover,
#page-nav-links li a.active {
    color: var(--blue);
    border-bottom-color: var(--blue);
}

/* ── Main Layout ────────────────────────────────────────────── */
#main-content { padding: 50px 0 0; background: #f4f8fc; }

.main-layout {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 15px;
}

#content-column { width: 100%; }

/* ── Content Sections (white cards) ────────────────────────── */
.content-section {
    background: #fff;
    border-radius: 6px;
    padding: 36px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}

/* ── Section Titles ─────────────────────────────────────────── */
.section-title {
    font-size: 1.22rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid #d8e4f0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title i { color: var(--blue); font-size: 1rem; }

/* ── Key Facts Grid — exactly 3 columns ─────────────────────── */
.key-facts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin: 26px 0;
}

.kf-card {
    border-radius: 6px;
    padding: 20px 16px;
    text-align: center;
    color: #fff;
    transition: transform 0.22s, box-shadow 0.22s;
}

.kf-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,58,99,0.18);
}

.kf-blue   { background: var(--blue); }
.kf-teal   { background: var(--teal); }
.kf-green  { background: var(--green); }
.kf-orange { background: var(--orange); }
.kf-navy   { background: var(--dark-blue); }
.kf-purple { background: var(--purple); }

.kf-icon  { font-size: 1.4rem; margin-bottom: 6px; opacity: 0.9; }
.kf-num   { font-size: 2rem; font-weight: 800; line-height: 1; color: #fff; }
.kf-label { font-size: 0.76rem; font-weight: 600; margin: 6px 0 3px; letter-spacing: 0.03em; }
.kf-sub   { font-size: 0.67rem; opacity: 0.85; line-height: 1.35; }

/* ── Info Blocks ────────────────────────────────────────────── */
.info-block {
    background: #f8fbff;
    border: 1px solid #d0deee;
    border-left: 4px solid var(--blue);
    border-radius: 8px;
    padding: 22px 24px;
    margin: 20px 0;
}

.info-block h3 {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-block p {
    font-size: 0.9rem;
    color: var(--ink);
    line-height: 1.7;
    margin-bottom: 10px;
}

.info-block p:last-child { margin-bottom: 0; }

.info-block-compact { padding: 14px 18px; margin-top: 14px; }
.info-block-compact h3 { font-size: 0.9rem; margin-bottom: 8px; }

.info-block-header {
    display: flex;
    align-items: baseline;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}

.info-block-header h3 { margin-bottom: 0; flex-shrink: 0; }

.info-block-note {
    font-size: 0.82rem;
    color: #506070;
    line-height: 1.4;
}

.info-compact-text {
    font-size: 0.87rem !important;
    color: #3a4a5c !important;
    line-height: 1.6 !important;
    margin-bottom: 8px !important;
}

.info-block-tqt  { border-left-color: var(--teal); }
.info-block-glh  { border-left-color: var(--green); }
.info-block-ilh  { border-left-color: var(--purple); }

/* ── English Requirement Grid (2×2) ────────────────────────── */
.req-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 12px;
}

.req-grid-inline { margin-top: 0; }

.req-item {
    background: #fff;
    border: 1px solid #d0deee;
    border-radius: 8px;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.req-item-sm { padding: 8px 12px; }

.req-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--blue);
}

.req-value {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--dark-blue);
}

.req-value-lg { font-size: 1.05rem; }

.req-value small {
    font-size: 0.78rem;
    font-weight: 400;
    color: #506070;
    display: inline;
}

/* ── Doc Lists ──────────────────────────────────────────────── */
.doc-list { padding-left: 22px; margin: 12px 0; }

.doc-list li {
    font-size: 0.9rem;
    color: var(--ink);
    line-height: 1.7;
    margin-bottom: 6px;
}

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

.note-text {
    font-size: 0.83rem !important;
    color: var(--grey) !important;
    display: block;
    background: var(--tint);
    padding: 8px 12px 8px 34px;
    border-radius: 6px;
    margin-top: 10px !important;
    position: relative;
    line-height: 1.65;
}

.note-text i {
    color: var(--blue);
    position: absolute;
    left: 12px;
    top: 10px;
    font-size: 0.85rem;
}

/* ── Year / Semester Blocks ─────────────────────────────────── */
.year-block {
    margin-bottom: 32px;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.year-header {
    background: var(--dark-blue);
    color: #fff;
    padding: 18px 22px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.year-tag {
    background: var(--gold);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.year-tag-cross { background: var(--teal); }
.year-tag-2     { background: var(--blue); }

.year-header h3 {
    font-size: 1rem;
    font-weight: 700;
    margin: 0;
    color: #fff;
    flex: 1;
}

.year-credits { font-size: 0.78rem; color: rgba(255,255,255,0.75); white-space: nowrap; }

.year-intro {
    font-size: 0.9rem;
    color: var(--grey);
    line-height: 1.65;
    margin: 16px 22px 0;
    padding-bottom: 4px;
}

.unit-group-label {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--dark-blue);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin: 18px 22px 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.unit-group-label i { color: var(--gold); font-size: 0.75rem; }

/* ── Accordion ──────────────────────────────────────────────── */
.accordion {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 0 18px 18px;
}

.accordion-item {
    border: 1px solid #d0deee;
    border-radius: 8px;
    overflow: hidden;
    background: #fff;
}

.accordion-header {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: #fff;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: background 0.2s;
    font-family: 'Poppins', sans-serif;
}

.accordion-header:hover { background: var(--tint); }

.accordion-item.open .accordion-header {
    background: #eef4ff;
    color: var(--dark-blue);
    border-bottom: 2px solid var(--blue);
}

.acc-unit-num {
    background: var(--tint);
    color: var(--blue);
    font-size: 0.76rem;
    font-weight: 700;
    padding: 3px 9px;
    border-radius: 20px;
    white-space: nowrap;
    flex-shrink: 0;
}

.accordion-item.open .acc-unit-num { background: var(--blue); color: #fff; }

.acc-title {
    flex: 1;
    font-size: 0.93rem;
    font-weight: 600;
    color: var(--dark-blue);
}

.accordion-item.open .acc-title { font-weight: 700; }

.acc-credits {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--blue);
    background: var(--tint);
    padding: 3px 10px;
    border-radius: 12px;
    white-space: nowrap;
}

.acc-icon {
    color: var(--blue);
    transition: transform 0.3s;
    flex-shrink: 0;
    font-size: 0.82rem;
}

.accordion-item.open .acc-icon { transform: rotate(180deg); }

.accordion-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.accordion-item.open .accordion-body { max-height: 1200px; }

.unit-detail-grid {
    display: grid;
    grid-template-columns: 1fr 220px;
    gap: 24px;
    padding: 24px;
    background: #f8fbff;
    border-top: 1px solid #d0deee;
}

.unit-detail-main h4 {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--dark-blue);
    text-transform: none;
    letter-spacing: 0;
    margin-bottom: 8px;
    margin-top: 18px;
    padding: 6px 10px;
    background: var(--tint);
    border-left: 3px solid var(--blue);
    border-radius: 0 4px 4px 0;
}

.unit-detail-main h4:first-of-type { margin-top: 10px; }

.unit-detail-main p,
.unit-tagline {
    font-size: 0.9rem;
    color: var(--ink);
    line-height: 1.7;
    margin-bottom: 4px;
}

.unit-desc-list {
    list-style: disc;
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-top: 6px;
}

.unit-desc-list li {
    font-size: 0.88rem;
    color: var(--ink);
    line-height: 1.6;
    padding-left: 4px;
}

.unit-info-card {
    background: #fff;
    border: 1px solid #d0deee;
    border-radius: 8px;
    overflow: hidden;
    height: fit-content;
}

.unit-info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    border-bottom: 1px solid var(--tint);
    font-size: 0.84rem;
}

.unit-info-row:last-child { border-bottom: none; }
.unit-info-row strong { color: var(--grey); font-size: 0.78rem; }
.unit-info-row span { color: var(--dark-blue); font-weight: 600; text-align: right; }

/* ── Optional Units ─────────────────────────────────────────── */
.optional-units-box {
    margin: 10px 18px 18px;
    border: 1px solid #d0deee;
    border-radius: 8px;
    overflow: hidden;
}

.opt-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: #f8fbff;
    border: none;
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
    transition: background 0.2s;
    gap: 12px;
}

.opt-toggle:hover,
.opt-toggle[aria-expanded="true"] { background: var(--tint); }

.opt-toggle-left { display: flex; align-items: center; gap: 10px; }

.opt-toggle-icon {
    width: 26px;
    height: 26px;
    background: var(--blue);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    flex-shrink: 0;
    transition: transform 0.3s;
}

.opt-toggle[aria-expanded="true"] .opt-toggle-icon { transform: rotate(45deg); }

.opt-toggle-title { font-size: 0.9rem; font-weight: 700; color: var(--dark-blue); }

.opt-toggle-badge {
    background: var(--tint);
    color: var(--blue);
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
}

.opt-toggle-hint { font-size: 0.75rem; color: var(--grey); white-space: nowrap; }

.opt-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.opt-body.open { max-height: 800px; }

.opt-body-inner { padding: 18px 20px; border-top: 1px solid var(--border); }

.opt-intro { font-size: 0.88rem; color: var(--grey); margin-bottom: 14px; line-height: 1.6; }

.optional-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-bottom: 14px;
}

.optional-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--tint);
    border-radius: 6px;
    padding: 10px 14px;
    border: 1px solid #d0deee;
}

.opt-unit-num {
    background: var(--blue);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    white-space: nowrap;
    flex-shrink: 0;
}

.opt-unit-name { flex: 1; font-size: 0.85rem; font-weight: 600; color: var(--dark-blue); }
.opt-unit-glh  { font-size: 0.72rem; color: var(--grey); white-space: nowrap; }

/* ── Study Mode / Delivery Grid ─────────────────────────────── */
.delivery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 18px;
}

.delivery-card { border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }

.delivery-card-header {
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.delivery-card-header i { font-size: 1.1rem; color: #fff; opacity: 0.9; }

.delivery-card-header h3 {
    font-size: 1rem;
    font-weight: 800;
    color: #fff;
    margin: 0;
}

.delivery-card-intensive .delivery-card-header { background: var(--blue); }
.delivery-card-standard  .delivery-card-header { background: var(--teal); }

.delivery-card-body { padding: 18px 20px; background: #fafcff; }

.delivery-sem-list {
    list-style: none;
    padding: 0;
    margin: 0 0 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.delivery-sem-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.88rem;
    color: var(--ink);
    line-height: 1.5;
}

.delivery-sem-list li i { color: var(--green); flex-shrink: 0; margin-top: 2px; font-size: 0.82rem; }

.delivery-sem-tag {
    font-weight: 700;
    color: var(--dark-blue);
    white-space: nowrap;
    min-width: 88px;
    display: inline-block;
}

.delivery-note {
    background: var(--tint);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 0.78rem;
    color: var(--grey);
    border: 1px solid #d0deee;
    line-height: 1.55;
}

.delivery-note strong { color: var(--dark-blue); }

/* ── Grading Cards ──────────────────────────────────────────── */
.grading-cards { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; }

.grading-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    border-radius: 8px;
    padding: 18px 20px;
    border: 1px solid var(--border);
    background: #fafcff;
    transition: box-shadow 0.2s;
}

.grading-card:hover { box-shadow: 0 3px 12px rgba(0,58,99,0.09); }

.grading-card-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.1rem;
    color: #fff;
}

.grading-pass .grading-card-icon        { background: var(--green); }
.grading-merit .grading-card-icon       { background: var(--gold); }
.grading-distinction .grading-card-icon { background: var(--blue); }

.grading-card-body { flex: 1; }

.grading-card-title {
    font-size: 1rem;
    font-weight: 800;
    display: block;
    margin-bottom: 6px;
}

.grading-pass .grading-card-title        { color: var(--green); }
.grading-merit .grading-card-title       { color: var(--gold); }
.grading-distinction .grading-card-title { color: var(--blue); }

.grading-card p { font-size: 0.88rem; color: var(--grey); line-height: 1.65; margin-bottom: 0; }

/* ── Progression Section ────────────────────────────────────── */
#progression-section {
    background: var(--tint);
    padding: 40px 0;
}

#progression-section .container {
    max-width: 1100px;
}

.prog-wrapper-card {
    background: #fff;
    border-radius: 8px;
    padding: 36px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.prog-section-header { margin-bottom: 24px; }

.prog-section-intro { font-size: 0.93rem; color: var(--grey); line-height: 1.7; margin-bottom: 0; }

.progression-grid { display: grid; gap: 18px; }
.progression-two-col { grid-template-columns: repeat(2, 1fr); }

.prog-card {
    background: #f4f7fb;
    border: 1px solid #dde6f5;
    border-radius: 8px;
    padding: 24px;
    transition: all 0.22s;
}

/* Featured card — Progress to Higher Education */
.prog-card.prog-university {
    background: linear-gradient(135deg, #eef3fb 0%, #ddeaf8 100%);
    border-color: var(--blue);
    /* border-top: 3px solid var(--blue); */
    box-shadow: 0 2px 10px rgba(0,103,172,0.10);
}

.prog-card.prog-university .prog-card-icon { background: var(--dark-blue); }
.prog-card.prog-university h3 { color: var(--dark-blue); font-size: 1.02rem; }
.prog-card.prog-university .prog-list li i { color: var(--blue); }

/* Workforce card */
.prog-card.prog-careers { background: #f4f7fb; border-color: #cdd8ea; }
.prog-card.prog-careers .prog-card-icon { background: var(--teal); }

.prog-card:hover { transform: translateY(-2px); box-shadow: 0 3px 12px rgba(0,58,99,0.09); }

.prog-card-icon {
    width: 48px;
    height: 48px;
    background: var(--blue);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}

.prog-card-icon i { color: #fff; font-size: 1.2rem; }

.prog-card h3 {
    font-size: 0.96rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: 8px;
}

.prog-card p { font-size: 0.88rem; color: var(--grey); line-height: 1.65; margin-bottom: 0; }

.prog-list {
    list-style: none;
    padding: 0;
    margin: 12px 0 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.prog-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.86rem;
    color: var(--ink);
    line-height: 1.55;
}

.prog-list li i { color: var(--green); flex-shrink: 0; margin-top: 3px; font-size: 0.78rem; }

.progression-cta {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 24px;
    padding: 16px 20px;
    background: var(--tint);
    border-radius: 6px;
    border: 1px solid var(--border);
    font-size: 0.86rem;
    color: var(--grey);
    line-height: 1.55;
}

.progression-cta i { color: var(--blue); flex-shrink: 0; }
.progression-cta span { flex: 1; }

.progression-cta .btn {
    background: #00A4E4;
    color: #fff;
    border-color: #00A4E4;
    font-size: 0.85rem;
    padding: 9px 18px;
    border-radius: 6px;
    white-space: nowrap;
    font-weight: 600;
}

.progression-cta .btn:hover { background: #0089c4; border-color: #0089c4; }

/* =============================================================================
   18. LANGUAGE TOGGLE BUTTON  (#lang-toggle-btn)
   ─────────────────────────────────────────────────────────────────────────────
   BILINGUAL FEATURE — managed by js/lang.js
   ─────────────────────────────────────────────────────────────────────────────
   The button is fixed at the top-right of the viewport. It is intentionally
   placed ABOVE both the sticky header (z-index: 1000) and the fixed CTA bar
   (z-index: 1000) using z-index: 1100.

   Responsive behaviour:
     Default (>768px): pill shape with globe icon + text label
     ≤768px:           smaller pill (see responsive section)
     ≤480px:           hides the .lang-label text; becomes a circular icon button

   The button's HTML structure expected in index.html:
     <button id="lang-toggle-btn" aria-label="Switch language">
       <i class="fas fa-globe lang-icon"></i>
       <span class="lang-label">中文</span>
     </button>
   ─────────────────────────────────────────────────────────────────────────────
   NOTE: the responsive overrides for this button live inside the
   @media (max-width: 768px) and @media (max-width: 480px) blocks below.
   ============================================================================= */
#lang-toggle-btn {
    position: fixed;
    top: 65px;
    right: 20px;
    z-index: 1100;  /* above sticky header (1000) and fixed CTA bar (1000) */
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(0, 58, 99, 0.88);  /* semi-transparent dark-blue */
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, 0.35);
    border-radius: 20px;
    padding: 7px 16px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    /* backdrop-filter creates the frosted-glass effect on supported browsers */
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);  /* Safari prefix */
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.22);
    transition: background 0.2s, border-color 0.2s, transform 0.15s;
    white-space: nowrap;
    text-decoration: none;
    outline: none;
}

#lang-toggle-btn:hover {
    background: var(--blue);
    border-color: rgba(255, 255, 255, 0.55);
    transform: translateY(-1px);
}

#lang-toggle-btn:active {
    transform: translateY(0);  /* snap back on click */
}

#lang-toggle-btn .lang-icon {
    font-size: 1rem;
    line-height: 1;
}

#lang-toggle-btn .lang-label {
    line-height: 1;
}

/* ── CTA Fixed Bar ──────────────────────────────────────────── */
#cta-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: linear-gradient(90deg, var(--dark-blue) 0%, var(--blue) 100%);
    border-top: 3px solid var(--gold);
    box-shadow: 0 -4px 24px rgba(0,0,0,0.22);
    padding: 13px 32px;
}

.cta-bar-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.cta-bar-inner h2 {
    font-size: 1.05rem;
    font-weight: 800;
    color: #fff;
    margin: 0;
    white-space: nowrap;
}

.cta-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin: 0; }

.btn-sky {
    background: #00A4E4;
    color: #fff;
    border: 2px solid #00A4E4;
    font-weight: 700;
    border-radius: 6px;
    padding: 9px 22px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: background 0.2s, border-color 0.2s;
    text-decoration: none !important;
}

.btn-sky:hover { background: #0089c4; border-color: #0089c4; color: #fff; }

.btn-white { background: #fff; color: #00A4E4; border-color: #fff; font-weight: 700; }
.btn-white:hover { background: #f0f6ff; color: var(--dark-blue); }

.btn-outline-white {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.6);
    font-weight: 600;
}

.btn-outline-white:hover { background: rgba(255,255,255,0.12); border-color: #fff; color: #fff; }
.btn-cta-main { font-size: 0.88rem; padding: 9px 22px; border-radius: 6px; }

/* ── Tablet wide (≤1100px) ── */
@media (max-width: 1100px) {
    #lang-toggle-btn {top: 30%; right: 0; border-radius: 20px 0 0 20px; padding: 10px; transition: transform 0.3s ease-in-out; }
    #lang-toggle-btn:hover .lang-label {display: block;}
    #lang-toggle-btn .lang-label {display: none;}
}

/* ── Responsive Breakpoints ─────────────────────────────────── */
@media (max-width: 900px) {
    .container { padding: 0 20px; }
    .req-grid           { grid-template-columns: 1fr !important; }
    .optional-grid      { grid-template-columns: 1fr !important; }
    .key-facts-grid     { grid-template-columns: repeat(2, 1fr); }
    #hero-content h1    { font-size: 2.2rem; }
    #hero-content h2    { font-size: 1.2rem; }
    .content-section    { padding: 26px 22px; }
    .unit-detail-grid   { grid-template-columns: 1fr; }
    .unit-detail-side   { order: -1; }
    .progression-two-col{ grid-template-columns: 1fr; }
    .delivery-grid      { grid-template-columns: 1fr; }
    .doc-list.two-col   { gap: 4px; }
}

@media (max-width: 768px) {
    .container          { padding: 0 14px; }
    body                { padding-bottom: 80px; }
    .content-section    { padding: 22px 16px; }
    .key-facts-grid     { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    #page-nav-links li a{ padding: 11px 12px; font-size: 0.75rem; }
    #hero-section       { padding: 40px 16px 60px; min-height: 280px; }
    #hero-content h1    { font-size: 1.7rem; }
    .year-header        { padding: 14px 16px; }
    .year-intro         { margin: 12px 16px 0; }
    .unit-group-label   { margin: 14px 16px 8px; }
    .accordion          { padding: 0 12px 14px; }
    .optional-units-box { margin: 8px 12px 14px; }
    #cta-banner         { padding: 12px 16px; }
    .cta-bar-inner      { gap: 10px; }
    .cta-bar-inner h2   { font-size: 0.88rem; white-space: normal; }
    .prog-wrapper-card  { padding: 22px 16px; }
    .progression-cta    { flex-direction: column; align-items: flex-start; gap: 10px; }
}

@media (max-width: 767px) {
    #lang-toggle-btn {top:35%}
}

@media (max-width: 480px) {
    .key-facts-grid     { grid-template-columns: 1fr; }
    #hero-badge         { font-size: 0.72rem; padding: 4px 11px; }
    .cta-actions        { flex-direction: column; width: 100%; }
    .btn-cta-main       { width: 100%; text-align: center; }
    .accordion-header {
        display: grid;
        /* grid-template-columns: repeat(2, auto); */
        grid-template-areas:         "year year"        "title title"        "credits arrow";
        gap: 8px 12px;
        align-items: center;

        padding: 20px;
    }
    .acc-unit-num {grid-area: year;}
    .acc-title {grid-area: title;}
    .acc-credits {grid-area: credits;}
    .acc-icon {
        grid-area: arrow;
        /* justify-self: end; */
    }
    .optional-collapsible .opt-toggle {
        display: grid !important;
    }
    .opt-toggle-left {
        display: grid !important;
        grid-template-columns: repeat(2, auto);
    }
    .acc-title        { font-size: 0.83rem; }
}
@media (max-width: 350px) {

}