.container {
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-pad);
}

/* ---------- Bandeau d'annonce ---------- */
.announcement-bar {
    position: fixed;
    inset-block-start: 0;
    inset-inline: 0;
    z-index: 60;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    height: var(--announcement-height);
    padding-inline: var(--container-pad);
    background: var(--color-alert);
}

.announcement-bar__dot {
    flex-shrink: 0;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-surface);
    animation: announcement-pulse 2s ease-in-out infinite;
}

@keyframes announcement-pulse {
    0%,
    100% {
        opacity: 1;
    }
    50% {
        opacity: 0.25;
    }
}

.announcement-bar__text {
    flex: 1;
    min-width: 0;
    margin: 0;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: var(--color-bg);
    font-size: var(--fs-sm);
    text-align: center;
    letter-spacing: 0.01em;
}

.announcement-bar__text--short {
    display: none;
}

@media (max-width: 640px) {
    .announcement-bar__text--full {
        display: none;
    }

    .announcement-bar__text--short {
        display: block;
    }
}

/* ---------- En-tête / navigation ---------- */
.site-header {
    position: fixed;
    inset-block-start: var(--announcement-height);
    inset-inline: 0;
    z-index: 50;
    background: color-mix(in srgb, var(--color-bg) 88%, transparent);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid transparent;
    transition:
        border-color var(--transition-base),
        background var(--transition-base);
}

.site-header--scrolled {
    border-bottom-color: var(--color-border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--nav-height);
}

.nav__brand {
    font-family: var(--font-mono);
    font-size: var(--fs-base);
    font-weight: 500;
    letter-spacing: 0.02em;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav__link {
    position: relative;
    padding-block: var(--space-1);
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.nav__link:hover {
    color: var(--color-text);
}

.nav__link--active {
    color: var(--color-text);
}

.nav__link--active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -6px;
    height: 2px;
    background: var(--color-accent);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
}

.nav__toggle-bar {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    transition:
        transform var(--transition-fast),
        opacity var(--transition-fast);
}

@media (max-width: 860px) {
    .nav__toggle {
        display: flex;
    }

    .nav__list {
        position: fixed;
        top: calc(var(--announcement-height) + var(--nav-height));
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-2);
        padding: var(--space-6) var(--container-pad) var(--space-8);
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-8px);
        opacity: 0;
        visibility: hidden;
        transition:
            transform var(--transition-base),
            opacity var(--transition-base),
            visibility var(--transition-base);
    }

    .nav__list--open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav__link {
        padding-block: var(--space-2);
        font-size: var(--fs-md);
    }

    .nav--open .nav__toggle-bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .nav--open .nav__toggle-bar:nth-child(2) {
        opacity: 0;
    }

    .nav--open .nav__toggle-bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
}

/* ---------- Structure générale des sections ---------- */
main {
    padding-top: calc(var(--announcement-height) + var(--nav-height));
}

.section {
    padding-block: var(--space-24);
    border-bottom: 1px solid var(--color-border);
}

.section-header {
    margin-bottom: var(--space-12);
}

.section-header__title {
    position: relative;
    padding-bottom: var(--space-4);
    font-size: var(--fs-2xl);
}

.section-header__title::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 3px;
    background: var(--color-accent);
}

/* ---------- Pied de page ---------- */
.site-footer {
    background: var(--color-surface);
    padding-block: var(--space-12) var(--space-8);
}

.footer__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.footer__signature {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--color-text-muted);
}

.footer__links {
    display: flex;
    gap: var(--space-6);
}

.footer__links a {
    font-size: var(--fs-xs);
    color: var(--color-text-secondary);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: color var(--transition-fast);
}

.footer__links a:hover {
    color: var(--color-accent);
}