html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

[hidden] {
    display: none !important;
}

:focus-visible {
    outline: 3px solid var(--color-primary-blue);
    outline-offset: 5px;
}

button {
    cursor: pointer;
}

header {
    transition: box-shadow 220ms ease;
}

header.is-scrolled {
    box-shadow: 0 8px 30px rgba(26, 37, 47, 0.12);
}

nav.nav-links a {
    position: relative;
    padding: 8px 0;
}

nav.nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background: var(--color-primary-blue);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 220ms ease;
}

nav.nav-links a:hover::after,
nav.nav-links a[aria-current="location"]::after {
    transform: scaleX(1);
}

nav.nav-links a[aria-current="location"] {
    color: var(--color-primary-blue);
}

.menu-toggle {
    display: none;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: white;
    color: var(--color-darker);
    padding: 10px 12px;
    font: 600 14px var(--font-family);
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--color-primary-blue);
    transform: scaleX(0);
    transform-origin: left;
    z-index: 110;
    pointer-events: none;
}

.enhanced .hero-content > * {
    animation: entrance 750ms both;
}

.enhanced .hero-content > :nth-child(2) { animation-delay: 100ms; }
.enhanced .hero-content > :nth-child(3) { animation-delay: 200ms; }
.enhanced .hero-content > :nth-child(4) { animation-delay: 300ms; }
.enhanced .hero-content > :nth-child(5) { animation-delay: 400ms; }

@keyframes entrance {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.reveal-pending {
    opacity: 0;
    transform: translateY(24px);
}

.reveal {
    transition: opacity 650ms ease, transform 650ms ease;
    transition-delay: var(--reveal-delay, 0ms);
}

.value-card,
.prestation-card,
.reference-card,
.document-item {
    transition: transform 250ms ease, box-shadow 250ms ease;
}

@media (hover: hover) {
    .value-card:hover,
    .prestation-card:hover,
    .reference-card:hover,
    .document-item:hover {
        transform: translateY(-5px);
        box-shadow: 0 14px 32px rgba(26, 37, 47, 0.1);
    }

    .btn-primary:hover,
    .cta-header:hover {
        transform: translateY(-2px);
    }
}

.btn-primary,
.cta-header {
    transition: transform 200ms ease, background 200ms ease, box-shadow 200ms ease;
}

.btn-primary:active,
.cta-header:active {
    transform: translateY(1px);
}

.gallery-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 28px 0 12px;
}

.gallery-filters button {
    padding: 10px 18px;
    border: 1px solid #cbd5df;
    border-radius: 24px;
    color: var(--color-dark);
    background: white;
    font: 600 13px var(--font-family);
    transition: background 200ms ease, color 200ms ease;
}

.gallery-filters button[aria-pressed="true"] {
    color: white;
    border-color: var(--color-darker);
    background: var(--color-darker);
}

.gallery-filters button:hover:not([aria-pressed="true"]) {
    background: #e7edf3;
}

.gallery-status {
    font-size: 13px;
    color: var(--color-text-light);
}

.prestations-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 400px), 1fr));
}

.value-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
}

.enhanced .references-grid {
    margin-top: 24px;
}

a.reference-photo {
    position: relative;
    overflow: hidden;
    padding: 0;
    text-decoration: none;
    cursor: zoom-in;
    height: 240px;
}

.reference-photo:hover img,
.reference-photo:focus-visible img {
    transform: scale(1.04);
}

.photo-hint {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background: rgba(26, 37, 47, 0.9);
    color: white;
    font-size: 12px;
    padding: 7px 12px;
    border-radius: 4px;
    pointer-events: none;
}

.faq-layout {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 64px;
    align-items: start;
}

.section-eyebrow {
    display: block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-primary-blue);
    margin-bottom: 18px;
}

.faq h2 {
    text-align: left;
    margin-bottom: 20px;
}

.faq-layout > div > p {
    color: var(--color-text-light);
}

.faq-contact {
    display: inline-block;
    margin-top: 24px;
    color: var(--color-primary-blue);
    text-decoration: none;
    font-weight: 600;
}

.faq-list {
    border-top: 1px solid var(--color-border);
}

.faq details {
    border-bottom: 1px solid var(--color-border);
    padding: 22px 0;
}

.faq summary {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    list-style: none;
    font-weight: 600;
    cursor: pointer;
    color: var(--color-darker);
}

.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; color: var(--color-primary-blue); font-size: 20px; line-height: 1.2; }
.faq details[open] summary::after { content: '−'; }
.faq details[open] p { animation: entrance 250ms ease; }
.faq details p { margin-top: 16px; color: var(--color-text-light); font-size: 14px; }

.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    border: 1px solid #cbd5df;
    border-radius: 50%;
    background: white;
    color: var(--color-darker);
    box-shadow: 0 4px 16px rgba(26, 37, 47, 0.12);
    font-size: 24px;
    z-index: 90;
}

.gallery-dialog {
    inset: 0;
    margin: auto;
    width: min(1000px, calc(100% - 32px));
    max-height: calc(100dvh - 32px);
    padding: 56px 24px 24px;
    background: var(--color-darker);
    color: white;
    border: 1px solid #536271;
    border-radius: 12px;
}

.gallery-dialog::backdrop { background: rgba(15, 20, 25, 0.92); }
.gallery-dialog[open] { animation: entrance 200ms ease; }
.gallery-dialog figure { margin: 0; }
.gallery-image { display: block; width: 100%; height: min(56vh, 600px); object-fit: contain; }
.gallery-dialog figcaption { margin-top: 18px; text-align: center; font-size: 14px; }
.gallery-controls { display: flex; justify-content: center; align-items: center; gap: 24px; margin-top: 20px; }
.gallery-dialog button { border: 1px solid #536271; background: transparent; color: white; border-radius: 6px; width: 44px; height: 44px; font-size: 24px; }
.gallery-dialog button:hover { background: #344657; }
.gallery-dialog button:disabled { opacity: 0.35; cursor: default; }
.gallery-close { position: absolute; top: 8px; right: 12px; }
.gallery-count { min-width: 50px; text-align: center; font-size: 13px; }
.gallery-help { text-align: center; color: #bdc9d5; margin-top: 12px; font-size: 12px; }
.gallery-dialog :focus-visible { outline-color: white; }

@media (max-width: 1080px) {
    .header-container { flex-wrap: wrap; height: auto; min-height: 70px; gap: 12px; padding-top: 10px; padding-bottom: 10px; }
    .header-actions { margin-left: auto; }
    .header-actions .cta-header { display: none; }
    nav.nav-links { display: flex; flex-wrap: wrap; justify-content: center; width: 100%; gap: 12px 24px; order: 4; }
    .enhanced .menu-toggle { display: block; order: 3; }
    .enhanced nav.nav-links { display: none; position: absolute; top: 100%; left: 0; padding: 20px; background: white; border-bottom: 1px solid var(--color-border); box-shadow: 0 12px 20px rgba(26, 37, 47, 0.1); }
    .enhanced nav.nav-links.is-open { display: flex; flex-direction: column; align-items: stretch; }
    .enhanced nav.nav-links a { padding: 10px; }
}

@media (max-width: 768px) {
    section h2 { font-size: 28px; overflow-wrap: break-word; }
    .faq-layout { grid-template-columns: 1fr; gap: 32px; }
    .back-to-top { bottom: 88px; right: 26px; }
    .gallery-dialog { padding: 56px 16px 20px; }
    .gallery-help { display: none; }
}

@media (max-width: 420px) {
    .logo { gap: 6px; font-size: 13px; }
    .logo-icon { width: 32px; height: 32px; }
    .header-container { gap: 8px; }
    .menu-toggle { padding: 10px; }
    .gallery-filters button { padding: 10px 14px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation: none !important; transition: none !important; }
    .reveal-pending { opacity: 1; transform: none; }
}