/* ==========================================================================

   FOOTER — Pied de page : groupes sémantiques + responsive

   --------------------------------------------------------------------------

   Structure :

     1. .footer-tech      — crédits technologiques

     2. .footer-meta      — .diagram-info + hamburger (.footer-legal)

     3. .footer-copyright — mention de copyright

   --------------------------------------------------------------------------

   Liens légaux : menu déroulant (hamburger) sur tous les breakpoints.

   ========================================================================== */



/* ── Base (tous viewports) ───────────────────────────────────────────────── */

.app-footer {

    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: var(--sp-4);

    padding: 0 var(--sp-6);

    background: var(--bg-secondary);

    border-top: 1px solid var(--border-subtle);

    font-size: var(--fs-xs);

    color: var(--text-tertiary);

    min-height: var(--footer-height);

    flex-wrap: nowrap;

}



.footer-tech {

    display: flex;

    align-items: center;

    gap: var(--sp-2);

    flex-shrink: 0;

    white-space: nowrap;

}



.footer-tech > i {

    color: var(--accent);

    font-size: 0.8em;

    flex-shrink: 0;

}



/* Stats diagramme + hamburger sur une même ligne */

.footer-meta {

    display: flex;

    align-items: center;

    justify-content: center;

    gap: var(--sp-2);

    flex: 1;

    min-width: 0;

}



.diagram-info {

    font-family: var(--font-mono);

    font-size: 0.7rem;

    color: var(--text-tertiary);

    text-align: center;

    white-space: nowrap;

    overflow: hidden;

    text-overflow: ellipsis;

    flex: 1;

    min-width: 0;

}



.footer-legal {

    position: relative;

    flex-shrink: 0;

    z-index: 20;

}



.footer-legal-toggle {

    display: inline-flex;

    align-items: center;

    justify-content: center;

    width: 2rem;

    height: 2rem;

    padding: 0;

    border: 1px solid var(--border-subtle);

    border-radius: var(--radius-sm);

    background: transparent;

    color: var(--text-tertiary);

    font-size: 0.85rem;

    line-height: 1;

    transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);

}



.footer-legal-toggle:hover,

.footer-legal[data-open="true"] .footer-legal-toggle {

    border-color: var(--accent);

    color: var(--accent);

    background: var(--bg-tertiary);

}



.footer-legal-links {

    position: absolute;

    right: 0;

    bottom: calc(100% + var(--sp-1));

    min-width: 220px;

    max-width: min(92vw, 280px);

    max-height: min(50vh, 320px);

    overflow-y: auto;

    background: var(--bg-secondary);

    border: 1px solid var(--border-subtle);

    border-radius: var(--radius-md);

    box-shadow: var(--shadow-lg);

    padding: var(--sp-2);

    display: none;

    flex-direction: column;

    align-items: flex-start;

    gap: var(--sp-1);

    z-index: 30;

}



.footer-legal[data-open="true"] .footer-legal-links {

    display: flex;

}



.footer-legal-links .footer-sep {

    display: none;

}



.footer-copyright {

    flex-shrink: 0;

    white-space: nowrap;

    opacity: 0.7;

}



.footer-sep {

    color: var(--border-default);

    user-select: none;

    pointer-events: none;

    flex-shrink: 0;

}



.footer-tech a,

.footer-legal a {

    color: var(--text-tertiary);

    text-decoration: none;

    transition: color var(--t-fast), opacity var(--t-fast);

}



.footer-tech a:hover,

.footer-legal a:hover {

    color: var(--accent);

    text-decoration: none;

}



/* ── Tablette paysage ≤ 1280px ───────────────────────────────────────────── */

@media (max-width: 1280px) {

    .app-footer {

        padding: 0 var(--sp-4);

        gap: var(--sp-3);

    }

}



/* ── Tablette portrait ≤ 1024px ──────────────────────────────────────────── */

@media (max-width: 1024px) {

    .app-footer {

        flex-wrap: wrap;

        padding: var(--sp-2) var(--sp-4);

        gap: var(--sp-1) var(--sp-3);

        min-height: auto;

    }



    .footer-tech {

        order: 1;

        flex: 1 1 auto;

    }



    .footer-meta {

        order: 2;

        flex: 1 1 auto;

        justify-content: flex-end;

    }



    .footer-copyright {

        order: 3;

        flex: 0 1 auto;

    }

}



/* ── Tablette étroite / grand mobile ≤ 768px ─────────────────────────────── */

@media (max-width: 768px) {

    .app-footer {

        padding: var(--sp-2) var(--sp-3);

        font-size: 0.7rem;

    }



    .footer-tech {

        display: none;

    }



    .footer-meta {

        order: 1;

        flex: 1 1 auto;

        justify-content: flex-start;

    }



    .diagram-info {

        text-align: left;

    }



    .footer-copyright {

        order: 2;

        font-size: 0.65rem;

    }

}



/* ── Mobile ≤ 640px ──────────────────────────────────────────────────────── */

@media (max-width: 640px) {

    .app-footer {

        flex-direction: column;

        align-items: center;

        flex-shrink: 0;

        padding: var(--sp-2);

        padding-bottom: max(var(--sp-3), env(safe-area-inset-bottom));

        gap: var(--sp-2);

        min-height: auto;

    }



    .footer-meta {

        width: 100%;

        flex: 0 0 auto;

        justify-content: center;

    }



    .diagram-info {

        flex: 0 1 auto;

        max-width: calc(100% - 2.5rem);

    }



    .footer-legal-links {

        left: 50%;

        right: auto;

        transform: translateX(-50%);

    }



    .footer-legal a {

        font-size: 0.65rem;

        padding: 2px 0;

    }



    .footer-copyright {

        font-size: 0.6rem;

        width: 100%;

        text-align: center;

    }

}



/* ── Petit mobile ≤ 480px ────────────────────────────────────────────────── */

@media (max-width: 480px) {

    .app-footer {

        padding-left: max(var(--sp-2), env(safe-area-inset-left));

        padding-right: max(var(--sp-2), env(safe-area-inset-right));

    }



    .footer-legal a {

        font-size: 0.62rem;

    }



    .footer-sep {

        font-size: 0.6rem;

    }



    .footer-copyright {

        font-size: 0.58rem;

    }

}



/* ── Paysage court (≤ 600px de hauteur) ───────────────────────────────────── */

@media (max-height: 600px) and (orientation: landscape) {

    .app-footer {

        min-height: auto;

        padding-top: var(--sp-1);

        padding-bottom: max(var(--sp-2), env(safe-area-inset-bottom));

        gap: var(--sp-1);

    }



    .footer-legal-toggle {

        width: 1.75rem;

        height: 1.75rem;

        font-size: 0.8rem;

    }

}