/* ============================================================
   Header + Footer V3 — Clinical Tech V3
   Non-sticky · navy trust bar · mega menu Catalogue · footer 4 cols
   ============================================================ */

/* ─── BODY + SKIP LINK V3 ─── */
.bt-body {
    background: #fff;
    color: var(--color-text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
.bt-skip-link {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}
.bt-skip-link:focus {
    position: absolute;
    top: 8px;
    left: 8px;
    width: auto;
    height: auto;
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
    background: var(--color-text-primary);
    color: #fff;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    z-index: var(--z-modal);
    text-decoration: none;
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 600;
}

/* ─── BREADCRUMB V3 (sous header, blanc) ─── */
.bt-breadcrumb {
    background: #fff;
    border-bottom: 1px solid var(--color-border-light);
}
.bt-breadcrumb__list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    list-style: none;
    padding-top: 12px;
    padding-bottom: 12px;
    margin: 0 auto;
    font-size: 13px;
}
.bt-breadcrumb__sep {
    color: var(--color-text-muted);
    opacity: 0.4;
    font-size: 13px;
}
.bt-breadcrumb__current {
    font-weight: 500;
    color: var(--color-text-primary);
}
.bt-breadcrumb__link {
    color: var(--color-text-body);
    text-decoration: none;
    transition: color 150ms;
}
.bt-breadcrumb__link:hover { color: var(--color-text-primary); }

/* ─── AUTHOR BAR EEAT (avant footer, cream) ─── */
.bt-author-bar {
    background: var(--color-cream);
    border-top: 1px solid var(--color-border-light);
    border-bottom: 1px solid var(--color-border-light);
}
.bt-author-bar__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0 clamp(14px, 1.8vw, 24px);
    padding: 10px 0;
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 13px;
    color: var(--color-text-body);
}
.bt-author-bar__primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}
.bt-author-bar__avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--color-navy-deep);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.02em;
    flex-shrink: 0;
}
.bt-author-bar__avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}
.bt-author-bar__name {
    color: var(--color-text-primary);
    font-weight: 600;
}
.bt-author-bar__role { color: var(--color-text-body); }
.bt-author-bar__meta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-text-muted);
    font-variant-numeric: tabular-nums;
}
.bt-author-bar__meta svg {
    width: 13px;
    height: 13px;
    flex-shrink: 0;
    color: var(--color-blue);
}
.bt-author-bar__div {
    width: 1px;
    height: 14px;
    background: var(--color-border-medium);
    flex-shrink: 0;
}
.bt-author-bar__validated {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: 9999px;
    padding: 4px 12px;
    color: var(--color-text-primary);
    font-size: 12px;
}
.bt-author-bar__validated::before {
    content: "✓";
    color: var(--color-signal-ok);
    font-weight: 700;
}
.bt-author-bar__validated a {
    color: var(--color-navy-deep);
    text-decoration: none;
    border-bottom: 1px solid var(--color-border-medium);
}
@media (max-width: 768px) {
    .bt-author-bar__inner { font-size: 12px; gap: 4px 12px; padding: 8px 0; }
    .bt-author-bar__role { display: none; }
    .bt-author-bar__div { display: none; }
    .bt-author-bar__validated { margin-left: 0; }
}

/* ─── TRUST BAR (top, navy, mono cyan) ─── */
.bt-trust {
    background: var(--color-navy-deepest);
    color: rgb(var(--rgb-on-dark) / 0.78);
    border-bottom: 1px solid rgb(var(--rgb-on-dark) / 0.06);
}
.bt-trust__inner {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0 clamp(16px, 2vw, 28px);
    padding: 9px 0;
    font-family: 'JetBrains Mono', Menlo, Consolas, monospace;
    font-size: 11px;
    letter-spacing: 0.10em;
    text-transform: uppercase;
}
.bt-trust__item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: rgb(var(--rgb-on-dark) / 0.70);
}
.bt-trust__item svg { color: var(--color-cyan-tech); flex-shrink: 0; }
.bt-trust__item a {
    color: var(--color-text-on-dark);
    text-decoration: none;
    border-bottom: 1px solid rgb(var(--rgb-on-dark) / 0.20);
    font-variant-numeric: tabular-nums;
}
.bt-trust__item a:hover { border-bottom-color: var(--color-cyan-tech); }
.bt-trust__div {
    width: 1px;
    height: 14px;
    background: rgb(var(--rgb-on-dark) / 0.12);
    flex-shrink: 0;
}
@media (max-width: 768px) {
    .bt-trust__inner { font-size: 10px; gap: 0 14px; padding: 7px clamp(16px, 4vw, 24px); }
    .bt-trust__div { display: none; }
    .bt-trust__item--secondary { display: none; }
}

/* ─── HEADER (non-sticky, blanc) ─── */
.bt-header {
    position: relative;
    background: #fff;
    border-bottom: 1px solid var(--color-border-light);
    z-index: var(--z-header);
    transition: border-color 180ms var(--ease-out);
}
/* Quand le mega est ouvert, masque la border pour ne pas trancher la bulle flottante */
.bt-header:has(.bt-mega.is-open) { border-bottom-color: transparent; }
.bt-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: clamp(20px, 3vw, 40px);
    padding: 18px 0;
}

.bt-logo {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    text-decoration: none;
    color: var(--color-text-primary);
    line-height: 1;
}
.bt-logo picture {
    display: block;
    width: clamp(200px, 19vw, 260px);
    line-height: 0;
}
.bt-logo__img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 536 / 37;
}
.bt-logo__tag {
    white-space: nowrap;
    font-family: 'JetBrains Mono', monospace;
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

/* ─── NAV INLINE (desktop) ─── */
.bt-nav {
    display: flex;
    align-items: center;
    gap: clamp(20px, 2.5vw, 32px);
    margin-left: auto;
}
@media (max-width: 1023px) {
    .bt-nav { display: none; }
}
.bt-nav__item {
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-primary);
    text-decoration: none;
    background: transparent;
    border: 0;
    padding: 8px 0;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    position: relative;
    transition: color 200ms;
}
.bt-nav__item::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background: var(--color-blue);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 200ms var(--ease-out);
}
.bt-nav__item:hover { color: var(--color-blue); }
.bt-nav__item:hover::after,
.bt-nav__item[aria-expanded="true"]::after { transform: scaleX(1); }
.bt-nav__chevron {
    width: 10px;
    height: 10px;
    transition: transform 200ms var(--ease-out);
}
.bt-nav__item[aria-expanded="true"] .bt-nav__chevron { transform: rotate(180deg); }

/* ─── CTA primary header ─── */
.bt-header .bt-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: var(--color-blue);
    padding: 11px 22px;
    border-radius: var(--radius-pill);
    text-decoration: none;
    border: 0;
    cursor: pointer;
    white-space: nowrap;
    transition: background 200ms var(--ease-out), transform 150ms var(--ease-out), box-shadow 200ms var(--ease-out);
}
.bt-header .bt-cta:hover {
    background: var(--color-blue-hover);
    box-shadow: 0 2px 6px rgba(11, 25, 54, 0.10);
}

/* ─── BURGER mobile ─── */
.bt-burger {
    display: none;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: background 200ms;
}
.bt-burger:hover { background: var(--color-cream); }
@media (max-width: 1023px) {
    .bt-burger { display: inline-flex; }
    .bt-header .bt-cta { display: none; }
}

/* ─── MEGA PANEL Catalogue (V4 — bulle flottante, tabs verticales) ─── */
.bt-mega {
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    max-width: 1296px;
    margin: 6px auto 0;
    background: #fff;
    border-radius: 16px;
    border: 1px solid rgba(11, 25, 54, 0.06);
    overflow: hidden;
    box-shadow:
        0 1px 2px rgba(11, 25, 54, 0.04),
        0 8px 24px -6px rgba(11, 25, 54, 0.12),
        0 32px 64px -12px rgba(11, 25, 54, 0.24);
    z-index: var(--z-sticky);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 200ms var(--ease-out), transform 200ms var(--ease-out), visibility 0s 200ms;
}
.bt-mega.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity 200ms var(--ease-out), transform 200ms var(--ease-out), visibility 0s;
}
.bt-mega__grid {
    display: grid;
    grid-template-columns: 290px 1fr 340px;
}
@media (max-width: 1023px) {
    .bt-mega { display: none; }
}

/* ── COL 1 · Tabs verticales persona ────────────────────────── */
.bt-mega__tabs {
    background: var(--color-cream-deep);
    border-right: 1px solid var(--color-border-light);
    padding: 28px 0 32px;
    display: flex; flex-direction: column;
}
.bt-mega__tabs-header {
    font-family: 'Inter', sans-serif;
    font-size: 13px; font-weight: 600;
    letter-spacing: -0.005em;
    color: var(--color-text-primary);
    padding: 0 22px;
    margin: 0 0 16px;
}
.bt-mega__tabs-header small {
    display: block;
    font-family: 'Inter', sans-serif;
    font-size: 12px; font-weight: 400;
    color: var(--color-text-body);
    margin-top: 4px;
}
.bt-mega__tab {
    display: grid;
    grid-template-columns: 18px 1fr;
    align-items: center;
    column-gap: 12px; row-gap: 3px;
    padding: 16px 22px;
    cursor: pointer;
    position: relative;
    margin-right: -1px;
    background: transparent;
    border: 0;
    text-align: left;
    font: inherit;
    transition: background 200ms var(--ease-out), color 200ms;
}
.bt-mega__tab:hover { background: rgba(255, 255, 255, 0.50); }
.bt-mega__tab-dot {
    grid-row: 1 / span 2; grid-column: 1;
    width: 16px; height: 16px;
    border: 2px solid var(--color-border-medium);
    border-radius: 50%;
    background: #fff;
    position: relative;
    transition: all 200ms var(--ease-out);
}
.bt-mega__tab-dot::after {
    content: '';
    position: absolute; inset: 3px;
    border-radius: 50%;
    background: transparent;
    transition: background 200ms var(--ease-out);
}
.bt-mega__tab-name {
    grid-column: 2; grid-row: 1;
    font-family: 'Inter', sans-serif;
    font-size: 14px; font-weight: 600; letter-spacing: -0.015em;
    color: var(--color-text-primary);
    line-height: 1.2;
}
.bt-mega__tab-meta {
    grid-column: 2; grid-row: 2;
    font-family: 'JetBrains Mono', monospace;
    font-size: 9px; font-weight: 500;
    letter-spacing: 0.10em; text-transform: uppercase;
    color: var(--color-text-muted);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* État ACTIF : tab blanche fusionnée avec col 2 */
.bt-mega[data-active="medic"] .bt-mega__tab--medic,
.bt-mega[data-active="esth"]  .bt-mega__tab--esth {
    background: #fff;
    z-index: 1;
}
.bt-mega[data-active="medic"] .bt-mega__tab--medic .bt-mega__tab-name { color: var(--color-blue); font-weight: 700; }
.bt-mega[data-active="esth"]  .bt-mega__tab--esth  .bt-mega__tab-name { color: var(--color-blue-deep); font-weight: 700; }
.bt-mega[data-active="medic"] .bt-mega__tab--medic .bt-mega__tab-dot { border-color: var(--color-blue); }
.bt-mega[data-active="medic"] .bt-mega__tab--medic .bt-mega__tab-dot::after { background: var(--color-blue); }
.bt-mega[data-active="esth"]  .bt-mega__tab--esth  .bt-mega__tab-dot { border-color: var(--color-blue-deep); }
.bt-mega[data-active="esth"]  .bt-mega__tab--esth  .bt-mega__tab-dot::after { background: var(--color-blue-deep); }

/* Inverted corners : la tab active bombe haut/bas dans le cream-deep */
.bt-mega[data-active="medic"] .bt-mega__tab--medic::before,
.bt-mega[data-active="esth"]  .bt-mega__tab--esth::before,
.bt-mega[data-active="medic"] .bt-mega__tab--medic::after,
.bt-mega[data-active="esth"]  .bt-mega__tab--esth::after {
    content: '';
    position: absolute;
    right: 0;
    width: 10px; height: 10px;
    pointer-events: none;
}
.bt-mega[data-active="medic"] .bt-mega__tab--medic::before,
.bt-mega[data-active="esth"]  .bt-mega__tab--esth::before {
    top: -10px;
    background: radial-gradient(circle at 0 0, transparent 10px, #fff 10px);
}
.bt-mega[data-active="medic"] .bt-mega__tab--medic::after,
.bt-mega[data-active="esth"]  .bt-mega__tab--esth::after {
    bottom: -10px;
    background: radial-gradient(circle at 0 100%, transparent 10px, #fff 10px);
}

/* ── COL 2 · Contenu (variantes par audience) ───────────────── */
.bt-mega__content {
    padding: 28px 32px 30px;
    display: none;
    flex-direction: column;
    animation: bt-mega-fade 240ms var(--ease-out);
}
.bt-mega[data-active="medic"] .bt-mega__content--medic,
.bt-mega[data-active="esth"]  .bt-mega__content--esth { display: flex; }
@keyframes bt-mega-fade {
    from { opacity: 0; transform: translateY(3px); }
    to   { opacity: 1; transform: translateY(0); }
}
.bt-mega__content-eb { display: none; }
.bt-mega__content h2 {
    font-family: 'Inter', sans-serif;
    font-size: 18px; font-weight: 600;
    letter-spacing: -0.015em; line-height: 1.3;
    color: var(--color-text-primary);
    margin: 0 0 20px;
    text-wrap: balance;
}
.bt-mega__list {
    list-style: none; padding: 0; margin: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
}
.bt-mega__list li { border-top: 1px solid var(--color-border-light); }
.bt-mega__list li:nth-child(2n+1) { border-right: 1px solid var(--color-border-light); }
.bt-mega__list li:last-child:nth-child(2n+1) { grid-column: 1 / -1; border-right: 0; }
.bt-mega__list li a {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    column-gap: 12px;
    padding: 14px 0;
    text-decoration: none;
    color: var(--color-text-primary);
    transition: color 180ms var(--ease-out);
}
.bt-mega__list li:nth-child(2n+1) a { padding-right: 18px; }
.bt-mega__list li:nth-child(2n) a   { padding-left: 18px; }
.bt-mega__list li a:hover { color: var(--color-blue); }
.bt-mega__list li a:hover .bt-mega__list-name { transform: translateX(2px); }
.bt-mega__list-name {
    display: flex; flex-direction: column; gap: 1px;
    transition: transform 220ms var(--ease-out);
    min-width: 0;
}
.bt-mega__list-name b {
    font-family: 'Inter', sans-serif;
    font-size: 14px; font-weight: 600;
    letter-spacing: -0.005em; line-height: 1.2;
}
.bt-mega__list-name small {
    font-family: 'Inter', sans-serif;
    font-size: 12px; font-weight: 400;
    color: var(--color-text-body);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.bt-mega__list-count {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px; font-weight: 600;
    color: var(--color-text-body);
    white-space: nowrap;
    background: var(--color-cream);
    padding: 3px 8px;
    border-radius: var(--radius-sm);
}

/* ── COL 3 · Spotlight (variantes par audience) ─────────────── */
.bt-mega__spot {
    background: var(--color-navy-deepest);
    color: #fff;
    padding: 28px 24px 24px;
    display: none;
    flex-direction: column;
    gap: 18px;
    position: relative; overflow: hidden;
    animation: bt-mega-fade 240ms var(--ease-out);
}
.bt-mega[data-active="medic"] .bt-mega__spot--medic,
.bt-mega[data-active="esth"]  .bt-mega__spot--esth { display: flex; }
.bt-mega__spot-card {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 16px;
    align-items: stretch;
}
.bt-mega__spot-photo {
    display: block;
    width: 140px; height: 140px;
    border-radius: var(--radius-lg);
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.10);
    overflow: hidden;
}
.bt-mega__spot-photo img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
}
.bt-mega__spot-info {
    display: flex; flex-direction: column;
    min-width: 0;
    height: 140px;
    gap: 4px;
}
.bt-mega__spot-eb {
    font-family: 'Inter', sans-serif;
    font-size: 12px; font-weight: 500;
    color: var(--color-text-on-dark-muted);
    margin: 0;
}
.bt-mega__spot-name {
    font-family: 'Inter', sans-serif;
    font-size: 22px; font-weight: 700;
    letter-spacing: -0.02em; line-height: 1.05;
    margin: 2px 0 0;
    color: #fff;
}
.bt-mega__spot-pitch {
    font-size: 12px; line-height: 1.4;
    color: var(--color-text-on-dark-muted);
    margin: 4px 0 0;
    display: -webkit-box;
    -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden;
}
.bt-mega__spot-cta {
    display: inline-flex; align-items: center; gap: 6px;
    align-self: flex-start;
    background: var(--color-blue); color: #fff;
    padding: 8px 16px; border-radius: var(--radius-pill);
    font-family: 'Inter', sans-serif;
    font-size: 12px; font-weight: 600;
    text-decoration: none;
    margin-top: auto;
    transition: background-color 180ms, transform 180ms var(--ease-out);
}
.bt-mega__spot-cta::after { content: '→'; transition: transform 220ms var(--ease-out); }
.bt-mega__spot-cta:hover { background: var(--color-blue-hover); transform: translateY(-1px); }
.bt-mega__spot-cta:hover::after { transform: translateX(2px); }
.bt-mega__spot-foot {
    border-top: 1px solid rgba(255, 255, 255, 0.10);
    padding-top: 16px;
    margin-top: auto;
}
.bt-mega__spot-demo {
    font-family: 'Inter', sans-serif;
    font-size: 12px; font-weight: 500;
    color: var(--color-text-on-dark-muted);
    text-decoration: none;
    transition: color 180ms;
}
.bt-mega__spot-demo:hover { color: var(--color-cyan-tech); }

/* ─── MOBILE PANEL ─── */
.bt-mobile {
    background: #fff;
    border-bottom: 1px solid var(--color-border-light);
}
@media (min-width: 1024px) {
    .bt-mobile { display: none !important; }
}
.bt-mobile__inner { padding: 24px 0 32px; }

/* Tabs persona mobile — mirroir du desktop */
.bt-mobile__tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 24px;
    padding: 4px;
    background: var(--color-cream);
    border-radius: var(--radius-pill);
}
.bt-mobile__tab {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 10px 14px;
    background: transparent;
    border: 0;
    border-radius: var(--radius-pill);
    color: var(--color-text-body);
    text-align: left;
    cursor: pointer;
    transition: background-color 200ms var(--ease-out), color 200ms var(--ease-out);
}
.bt-mobile__tab[aria-selected="true"] {
    background: #fff;
    color: var(--color-text-primary);
    box-shadow: 0 1px 2px rgba(11,25,54,0.06), 0 1px 3px rgba(11,25,54,0.08);
}
.bt-mobile__tab--medic[aria-selected="true"] { color: var(--color-blue); }
.bt-mobile__tab--esth[aria-selected="true"]  { color: var(--color-blue-deep); }
.bt-mobile__tab-name {
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.2;
}
.bt-mobile__tab-meta {
    font-family: 'JetBrains Mono', monospace;
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

/* Visibilité des panels par data-active */
.bt-mobile[data-active="medic"] .bt-mobile__group--esth,
.bt-mobile[data-active="esth"]  .bt-mobile__group--medic {
    display: none;
}

/* Compteur sur les indications mobile */
.bt-mobile__group li a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}
.bt-mobile__count {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text-muted);
}

.bt-mobile__group { margin-bottom: 24px; }
.bt-mobile__group:last-child { margin-bottom: 0; }
.bt-mobile__group-eyebrow {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-blue);
    margin: 0 0 12px;
}
.bt-mobile__group ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    border-top: 1px solid var(--color-border-light);
}
.bt-mobile__group li a {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border-light);
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-primary);
    text-decoration: none;
}
.bt-mobile__group li a:hover { color: var(--color-blue); }
.bt-mobile__cta {
    display: block;
    margin-top: 24px;
    padding: 14px 22px;
    background: var(--color-blue);
    color: #fff;
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-pill);
    text-decoration: none;
    text-align: center;
}

/* ============================================================
   FOOTER V3 — Pre-footer aside + footer navy 4 cols
   ============================================================ */

.bt-prefooter {
    background: var(--color-cream);
    border-top: 1px solid var(--color-border-light);
    padding: clamp(56px, 7vw, 96px) 0;
}
.bt-prefooter__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: clamp(28px, 4vw, 64px);
    align-items: end;
}
@media (max-width: 900px) {
    .bt-prefooter__grid { grid-template-columns: 1fr; align-items: start; }
}
.bt-prefooter__copy h2 {
    font-family: 'Inter', sans-serif;
    font-size: clamp(28px, 3vw, 40px);
    font-weight: 600;
    letter-spacing: -0.025em;
    line-height: 1.12;
    color: var(--color-text-primary);
    margin: 12px 0 0;
    max-width: 22ch;
    text-wrap: balance;
}
.bt-prefooter__copy p {
    font-size: 15px;
    line-height: 1.65;
    color: var(--color-text-body);
    max-width: 55ch;
    margin: 16px 0 0;
}
.bt-prefooter__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.bt-footer {
    background: var(--color-navy-deepest);
    color: rgb(var(--rgb-on-dark) / 0.85);
}
.bt-footer__main {
    padding: clamp(64px, 8vw, 112px) 0 clamp(40px, 5vw, 72px);
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: clamp(32px, 4vw, 64px);
}
@media (max-width: 900px) {
    .bt-footer__main { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
    .bt-footer__main { grid-template-columns: 1fr; }
}

.bt-footer__brand-name {
    font-family: 'Inter', sans-serif;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--color-text-on-dark);
}
.bt-footer__brand-name em {
    font-style: normal;
    color: var(--color-blue-electric);
    margin-left: 2px;
}
.bt-footer__brand-desc {
    font-size: 14px;
    line-height: 1.65;
    color: rgb(var(--rgb-on-dark) / 0.65);
    margin: 16px 0 24px;
    max-width: 38ch;
}
.bt-footer__address {
    font-style: normal;
    font-size: 13px;
    line-height: 1.7;
    color: rgb(var(--rgb-on-dark) / 0.65);
}
.bt-footer__address a {
    color: rgb(var(--rgb-on-dark) / 0.85);
    text-decoration: none;
    border-bottom: 1px solid rgb(var(--rgb-on-dark) / 0.20);
}
.bt-footer__address a:hover { border-bottom-color: var(--color-blue-electric); color: var(--color-text-on-dark); }

.bt-footer__col h3 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-cyan-tech);
    margin: 0 0 18px;
}
.bt-footer__col ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.bt-footer__col li a {
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    color: rgb(var(--rgb-on-dark) / 0.75);
    text-decoration: none;
    transition: color 200ms;
}
.bt-footer__col li a:hover { color: var(--color-text-on-dark); }

.bt-footer__bottom {
    border-top: 1px solid rgb(var(--rgb-on-dark) / 0.10);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.10em;
    color: rgb(var(--rgb-on-dark) / 0.50);
}
.bt-footer__bottom-meta {
    text-transform: uppercase;
}
@media (max-width: 600px) {
    .bt-footer__bottom { font-size: 10px; }
}