/* Nav : full-width, bottom border, 3-col grid (logo | nav centré | auth) */

.site-header-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 0.5px solid rgba(255, 255, 255, 0.15);
    font-family: var(--ruixen-ui, "Geist Sans", ui-sans-serif, system-ui, sans-serif);
    user-select: none;
    transition: border-color 0.3s ease;
}

/* ── Mode clair (sur fond blanc) ── */
.site-header-nav.is-light {
    border-bottom-color: rgba(0, 0, 0, 0.08);
}

.site-header-nav.is-light .site-header-nav__background {
    background: #fff;
}

.site-header-nav.is-light .site-header-nav__link {
    color: rgba(0, 0, 0, 0.7);
}

.site-header-nav.is-light .site-header-nav__link:hover {
    background: rgba(0, 0, 0, 0.06);
    color: #000;
}

.site-header-nav.is-light .site-header-nav__btn-login {
    color: rgba(0, 0, 0, 0.7);
    border-color: rgba(0, 0, 0, 0.18);
}

.site-header-nav.is-light .site-header-nav__btn-login:hover {
    background: rgba(0, 0, 0, 0.05);
    color: #000;
    border-color: rgba(0, 0, 0, 0.3);
}

.site-header-nav.is-light .site-header-nav__burger {
    color: rgba(0, 0, 0, 0.7);
}

.site-header-nav.is-light .site-header-nav__logo-img {
    filter: invert(1);
}

.site-header-nav.is-light .site-header-nav__btn-signup {
    background: #0a0a0a;
    color: #fff;
    border-color: transparent;
}

.site-header-nav.is-light .site-header-nav__btn-signup:hover {
    background: #222;
}

.site-header-nav.is-light .site-header-nav__signup-glow {
    background: #0a0a0a;
    opacity: 0.15;
}

/* Drawer links on light pages */
.site-header-nav.is-light .site-header-nav__drawer {
    background: #fff;
}
.site-header-nav.is-light .site-header-nav__drawer-nav a {
    color: rgba(0, 0, 0, 0.7);
}
.site-header-nav.is-light .site-header-nav__drawer-nav a:hover {
    background: rgba(0, 0, 0, 0.06);
    color: #000;
}

.site-header-nav__background {
    position: absolute;
    inset: 0;
    z-index: -1;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.site-header-nav__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    width: 100%;
    padding: 1rem 1.5rem;
}

@media (min-width: 1024px) {
    .site-header-nav__inner {
        grid-template-columns: 1fr 1fr 1fr;
        padding: 1rem 2.5rem;
    }
}

/* Col 1 : Logo */
.site-header-nav__col-logo {
    display: flex;
    align-items: center;
}

.site-header-nav__logo-mark {
    display: block;
    text-decoration: none;
    color: inherit;
    flex-shrink: 0;
}

.site-header-nav__logo-img {
    height: 1.75rem;
    width: auto;
    max-width: 7.5rem;
    object-fit: contain;
    display: block;
}

.site-header-nav__logo-fallback {
    display: none;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 0.35rem;
    background: rgba(255, 255, 255, 0.1);
    font-size: 0.85rem;
    font-weight: 700;
    color: #e5e7eb;
}

/* Col 2 : Nav centrée (desktop uniquement) */
.site-header-nav__col-nav {
    display: none;
    position: relative;
}

@media (min-width: 1024px) {
    .site-header-nav__col-nav {
        display: block;
    }
}

.site-header-nav__nav-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    white-space: nowrap;
}

.site-header-nav__desktop-nav {
    display: flex;
    align-items: center;
    gap: 0;
    font-size: 0.9375rem;
    letter-spacing: 0.01em;
}

.site-header-nav__link {
    display: block;
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    border-radius: 0.375rem;
    white-space: nowrap;
    transition: background 0.15s ease, color 0.15s ease;
}

.site-header-nav__link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

/* Col 3 : Auth + burger */
.site-header-nav__col-auth {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.5rem;
}

.site-header-nav__desktop-auth {
    display: none;
    align-items: center;
    gap: 0.5rem;
}

@media (min-width: 640px) {
    .site-header-nav__desktop-auth {
        display: flex;
    }
}

.site-header-nav__btn-login {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 2.25rem;
    padding: 0 1rem;
    font-size: 0.875rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    border-radius: 9999px;
    border: 0.5px solid rgba(255, 255, 255, 0.2);
    background: transparent;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
    white-space: nowrap;
}

.site-header-nav__btn-login:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.35);
}

.site-header-nav__signup-wrap {
    position: relative;
}

.site-header-nav__signup-glow {
    display: block;
    position: absolute;
    inset: 0;
    margin: -0.5rem;
    border-radius: 9999px;
    background: #f3f4f6;
    opacity: 0.25;
    filter: blur(14px);
    pointer-events: none;
    transition: opacity 0.25s ease, filter 0.25s ease;
}

.site-header-nav__signup-wrap:hover .site-header-nav__signup-glow {
    opacity: 0.45;
    filter: blur(20px);
}

.site-header-nav__btn-signup {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 2.25rem;
    padding: 0 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: #000;
    text-decoration: none;
    border-radius: 9999px;
    border: 0.5px solid rgba(0, 0, 0, 0.2);
    background: #fff;
    cursor: pointer;
    transition: background 0.15s ease;
    white-space: nowrap;
}

.site-header-nav__btn-signup:hover {
    background: #e5e7eb;
}

/* Burger (mobile) */
.site-header-nav__burger {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    padding: 0;
    border: none;
    background: transparent;
    color: rgba(255, 255, 255, 0.85);
    cursor: pointer;
}

.site-header-nav__burger-icon--close {
    display: none;
}

.site-header-nav.is-open .site-header-nav__burger-icon--open {
    display: none;
}

.site-header-nav.is-open .site-header-nav__burger-icon--close {
    display: block;
}

@media (min-width: 640px) {
    .site-header-nav__burger {
        display: none;
    }
}

/* ─── Mobile (< 640px) : on affiche Sign up + Log in à côté du burger.
   On garde les couleurs desktop (signup = filled / login = outlined),
   qui s'inversent automatiquement via .is-light sur fond blanc. ─── */
@media (max-width: 639px) {
    .site-header-nav__desktop-auth {
        display: flex;
        gap: 0.5rem;
        margin-right: 0.5rem;
    }
    /* Ordre visuel : Sign up for free → Log in → burger */
    .site-header-nav__desktop-auth .site-header-nav__signup-wrap { order: 1; }
    .site-header-nav__desktop-auth .site-header-nav__btn-login    { order: 2; }

    /* Tailles compactes pour le mobile (couleurs gérées par desktop + is-light) */
    .site-header-nav__desktop-auth .site-header-nav__btn-signup,
    .site-header-nav__desktop-auth .site-header-nav__btn-login {
        height: 2rem;
        padding: 0 0.85rem;
        font-size: 0.8125rem;
    }

    /* Header inner : grid serré sur mobile */
    .site-header-nav__inner {
        grid-template-columns: auto 1fr auto;
        gap: 0.5rem;
        padding: 0.875rem 0.875rem;
    }
    /* Blur plus léger sur mobile */
    .site-header-nav__background {
        backdrop-filter: blur(6px);
        -webkit-backdrop-filter: blur(6px);
    }
    .site-header-nav__col-auth {
        display: flex;
        align-items: center;
        justify-content: flex-end;
        gap: 0.25rem;
    }
    .site-header-nav__burger {
        margin-left: 0.125rem;
    }
}

/* Drawer mobile */
.site-header-nav__drawer {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
    border-top: 0.5px solid transparent;
    transition: max-height 0.3s ease, opacity 0.3s ease, border-color 0.3s ease, padding 0.3s ease;
}

.site-header-nav.is-open .site-header-nav__drawer {
    max-height: 600px;
    opacity: 1;
    padding: 1rem 1.5rem 1.5rem;
    pointer-events: auto;
    border-color: rgba(255, 255, 255, 0.1);
}

.site-header-nav__drawer-nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    width: 100%;
}

.site-header-nav__drawer-nav a {
    font-size: 1rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    width: 100%;
    text-align: center;
    padding: 0.625rem;
    border-radius: 0.5rem;
    transition: background 0.15s, color 0.15s;
}

.site-header-nav__drawer-nav a:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.site-header-nav__drawer-auth {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.625rem;
    margin-top: 1rem;
    width: 100%;
}