/* =====================================================
   HEADER GLOBAL (fixe au scroll)
   ===================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--paper);
    border-bottom: 3px solid transparent;
    transition: border-color 180ms ease, box-shadow 180ms ease;
}
.site-header--scrolled {
    border-bottom-color: var(--red);
    box-shadow: 0 6px 18px rgba(0,0,0,0.06);
}
.site-header__inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 14px clamp(18px, 4vw, 48px);
    display: flex;
    align-items: center;
    gap: clamp(16px, 3vw, 40px);
}
.site-header__brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--ink);
    font-family: var(--display);
    font-weight: 400;
    font-size: clamp(20px, 2.4vw, 26px);
    letter-spacing: 0.01em;
    text-transform: uppercase;
    white-space: nowrap;
}
.site-header__brand strong { color: var(--ink); font-weight: 400; }
.site-header__fist { font-size: 1.1em; line-height: 1; }

.site-header__nav {
    display: flex;
    align-items: center;
    gap: clamp(10px, 1.6vw, 26px);
    margin-left: auto;
}
.site-header__nav a {
    font-family: var(--body);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--ink);
    padding: 4px 6px;
    background-image: linear-gradient(var(--yellow), var(--yellow));
    background-repeat: no-repeat;
    background-position: 0 100%;
    background-size: 100% 0;
    transition: background-size 140ms ease;
}
.site-header__nav a:hover,
.site-header__nav a:focus-visible {
    background-size: 100% 100%;
    color: var(--ink);
    outline: none;
}

.site-header__cta {
    flex-shrink: 0;
    font-family: var(--body);
    font-weight: 800;
    font-size: 14px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--paper);
    background: var(--ink);
    padding: 12px 22px;
    transition: background 140ms ease;
}
.site-header__cta:hover,
.site-header__cta:focus-visible { background: var(--red); color: var(--paper); outline: none; }

/* Header responsive : la nav passe sous la marque sur petit écran */
@media (max-width: 860px) {
    .site-header__inner { flex-wrap: wrap; row-gap: 12px; }
    .site-header__nav { order: 3; width: 100%; margin-left: 0; justify-content: space-between; gap: 8px; }
    .site-header__cta { margin-left: auto; }
}
@media (max-width: 520px) {
    .site-header__nav { font-size: 0; }
    .site-header__nav a { font-size: 12px; letter-spacing: 0.04em; }
}