/* =========================================
   FOOTER PROFESSIONNEL & RESPONSIVE (.footer.s5.section)
   ========================================= */
.footer.section {
    position: relative;
    grid-column: 1 / -1;
    width: 100%;
    padding: clamp(2.5rem, 5vw, 4.5rem) 0 0;
    margin: 0;
    box-sizing: border-box;
    overflow: hidden;
}

/* panneau verre éditorial 90% collé tout en bas sans radius bas */
.footer-shell {
    position: relative;
    isolation: isolate;
    width: 90%;
    max-width: 90%;
    margin: 0 auto;
    padding: clamp(3rem, 5.5vw, 4.75rem) clamp(1.5rem, 4.5vw, 4rem) clamp(1.5rem, 2.5vw, 2.25rem);
    border-radius: 24px 24px 0 0;
    border: 1px solid var(--rk-line);
    border-bottom: none;
    background:
        radial-gradient(ellipse 70% 55% at 50% 0%, color-mix(in srgb, var(--rk-accent) 10%, transparent), transparent 70%),
        linear-gradient(180deg, color-mix(in srgb, var(--rk-surface) 96%, transparent) 0%, color-mix(in srgb, var(--rk-shell) 92%, transparent) 100%);
    box-shadow:
        0 -10px 40px rgba(10, 26, 38, 0.05),
        0 4px 14px rgba(10, 26, 38, 0.03);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(2.5rem, 5vw, 4rem);
    box-sizing: border-box;
}

/* grille technique subtile en filigrane dans le haut du footer */
.footer-shell::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(to right, var(--rk-grid-line2) 1px, transparent 1px),
        linear-gradient(to bottom, var(--rk-grid-line2) 1px, transparent 1px);
    background-size: 36px 36px;
    -webkit-mask-image: radial-gradient(ellipse 80% 65% at 50% 25%, #000 35%, transparent 100%);
    mask-image: radial-gradient(ellipse 80% 65% at 50% 25%, #000 35%, transparent 100%);
}

/* --- Bloc principal centré --- */
.footer-main {
    position: relative;
    z-index: 2;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.25rem;
}

/* --- Titre --- */
.titre-footer,
.titre-footer.tn-head {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 100%;
    gap: 0.65rem;
    margin-bottom: 0.25rem;
    z-index: 2;
}

.title-footer,
.title.title-footer.tn-title {
    display: block;
    width: 100%;
    color: var(--rk-title);
    font-size: clamp(1.05rem, 4.4vw, 3.2rem);
    letter-spacing: -0.035em;
    line-height: 1.08;
    text-transform: none;
    white-space: nowrap;
    text-align: center;
    padding: 0;
    margin-top: 0.35rem;
}

.title-footer::before {
    content: none;
}

/* --- Texte d'appel --- */
.contact-us-f {
    position: relative;
    z-index: 2;
    font-family: var(--rk-font-body);
    font-size: clamp(0.96rem, 1.35vw, 1.12rem);
    letter-spacing: 0.01em;
    font-weight: 400;
    color: var(--rk-muted);
    text-align: center;
    width: 100%;
    max-width: 44ch;
    margin: 0 auto;
    padding: 0;
    line-height: 1.6;
}

/* --- Action principale --- */
.footer-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0.5rem;
}
.footer-actions .hero--btn {
    margin: 0;
}

/* --- Barre inférieure structurée en 3 colonnes --- */
.footer-bottom {
    position: relative;
    z-index: 2;
    width: 100%;
    padding-top: 1.5rem;
    border-top: 1px solid var(--rk-line);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 1.25rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    justify-self: start;
}
.footer-brand__logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    border: 1px solid #0a1a26;
    background: #0a1a26;
    box-shadow: 0 6px 16px rgba(10, 26, 38, 0.16);
    transition: transform 0.25s ease, background 0.25s ease;
}
.footer-brand__logo:hover {
    transform: translateY(-2px);
    background: #142838;
}
.footer-brand__logo img {
    width: 22px;
    height: auto;
    display: block;
}

.copyright {
    color: var(--rk-muted);
    font-family: var(--rk-font-body);
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.01em;
}

/* --- Icônes de contact (hover noir foncé) --- */
.icons-contact {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
}

.footer .icon {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.55rem;
    height: 2.55rem;
    margin: 0;
    padding: 0;
    border-radius: 50%;
    border: 1px solid var(--rk-border);
    background: var(--rk-surface);
    cursor: pointer;
    transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}
.footer .icon::before {
    content: none;
}
.footer .icon:hover {
    transform: translateY(-2px);
    border-color: #0a1a26;
    background: #0a1a26;
    box-shadow: 0 8px 20px rgba(10, 26, 38, 0.22);
}
.footer .icon svg {
    width: 1rem;
    height: 1rem;
    transition: transform 0.25s ease;
}
.footer .icon:hover svg {
    transform: scale(1.08);
}

#facebook, #linkedin, #google {
    fill: var(--rk-title);
    transition: fill 0.25s ease;
}
.footer .icon:hover #facebook,
.footer .icon:hover #linkedin,
.footer .icon:hover #google {
    fill: #ffffff;
}

/* --- Bouton retour en haut (hover noir foncé) --- */
.footer-top-btn {
    justify-self: end;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.5rem 0.9rem;
    border-radius: 999px;
    border: 1px solid var(--rk-line);
    background: transparent;
    color: var(--rk-muted);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    text-decoration: none;
    transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.footer-top-btn svg {
    width: 13px;
    height: 13px;
    transition: transform 0.25s ease;
}
.footer-top-btn:hover {
    color: #ffffff;
    border-color: #0a1a26;
    background: #0a1a26;
    box-shadow: 0 8px 20px rgba(10, 26, 38, 0.18);
    transform: translateY(-2px);
}
.footer-top-btn:hover svg {
    transform: translateY(-2px);
}

/* --- Helpers hérités conservés --- */
.content-portfolio { font-size: var(--text-detail); }
.content-equipe { font-size: 12px; letter-spacing: 3px; }
.type { text-transform: uppercase; font-size: 10px; letter-spacing: 2px; line-height: 20px; }
.section { margin-top: 1rem; margin-bottom: 1.5rem; }
.accueil { padding-top: 4rem; }
.footer { padding-bottom: 0; margin-bottom: 0; }
.footer .right::before { background: none !important; }
.prev, .next { font-family: 'League Spartan', sans-serif; }

/* --- Responsive tablette & mobile --- */
@media screen and (max-width: 820px) {
    .footer.section {
        padding: 2rem 0 0;
    }
    .footer-shell {
        width: 94%;
        max-width: 94%;
        padding: 2.25rem 1.25rem 1.5rem;
        border-radius: 20px 20px 0 0;
        gap: 2rem;
    }
    .title.title-footer.tn-title {
        font-size: clamp(1rem, 4.6vw, 2.2rem);
    }
    .footer-bottom {
        grid-template-columns: 1fr;
        justify-items: center;
        text-align: center;
        gap: 1rem;
    }
    .footer-brand {
        justify-self: center;
        flex-direction: column;
        gap: 0.5rem;
    }
    .footer-top-btn {
        justify-self: center;
    }
}