/* =============================================================================
   common.css — BF Fiduciaire SA
   ============================================================================= */

/* ─── Variables couleurs ─────────────────────────────────────────────────────── */
:root {
    --color-dark:       #2C3E50;   /* Bleu ardoise — nav, hero, titres forts */
    --color-dark-deep:  #1E2B36;   /* Footer */
    --color-dark-mid:   #3D5470;   /* Hover, accents secondaires */
    --color-gold:       #C9A96E;   /* Or satiné — accent discret */
    --color-gold-light: #D9BF8E;   /* Or hover */
    --color-bg:         #F8F6F2;   /* Blanc chaud — fond général */
    --color-bg-alt:     #FFFFFF;   /* Blanc pur — cartes, sections alternées */
    --color-border:     #E8E4DE;   /* Bordures subtiles */
    --color-text:       #1A2532;   /* Texte principal */
    --color-text-muted: #6B7280;   /* Texte secondaire */
    --color-text-light: #9CA3AF;   /* Texte tertiaire */

    /* ─── Typographie ─────────────────────────────────────────────────────── */
    --font-display: 'Outfit', sans-serif;
    --font-body:    'Inter', sans-serif;

    /* ─── Espacements ─────────────────────────────────────────────────────── */
    --space-xs:  0.5rem;
    --space-sm:  1rem;
    --space-md:  2rem;
    --space-lg:  4rem;
    --space-xl:  6rem;

    /* ─── Mise en page ────────────────────────────────────────────────────── */
    --container-max: 1200px;
    --radius-sm:  4px;
    --radius-md:  8px;
    --radius-lg:  12px;

    /* ─── Transitions ─────────────────────────────────────────────────────── */
    --transition: 0.2s ease;
}

/* ─── Reset & base ───────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.container {
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: 1.5rem;
}

/* ─── Typographie ────────────────────────────────────────────────────────────── */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.25;
    color: var(--color-dark);
}

h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.125rem; }

.section-eyebrow {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gold);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}
.section-eyebrow::before {
    content: '';
    display: block;
    width: 24px;
    height: 1px;
    background: var(--color-gold);
    flex-shrink: 0;
}

/* ─── Boutons ────────────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.5rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}
.btn--primary {
    background: var(--color-gold);
    color: #fff;
    border-color: var(--color-gold);
}
.btn--primary:hover {
    background: var(--color-gold-light);
    border-color: var(--color-gold-light);
}
.btn--outline {
    background: transparent;
    color: var(--color-gold);
    border-color: var(--color-gold);
}
.btn--outline:hover {
    background: var(--color-gold);
    color: #fff;
}
.btn--ghost {
    background: transparent;
    color: rgba(255,255,255,0.85);
    border-color: rgba(255,255,255,0.35);
}
.btn--ghost:hover {
    background: rgba(255,255,255,0.1);
}
.btn--dark {
    background: var(--color-dark);
    color: #fff;
    border-color: var(--color-dark);
}
.btn--dark:hover { background: var(--color-dark-mid); }
.btn--sm { padding: 0.45rem 1rem; font-size: 0.82rem; }

/* ─── Navigation ─────────────────────────────────────────────────────────────── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-dark);
    box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 1.5rem;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    flex-shrink: 0;
}
.nav__monogram {
    width: 36px;
    height: 36px;
    border: 1.5px solid var(--color-gold);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--color-gold);
    letter-spacing: 0.02em;
    flex-shrink: 0;
}
.nav__identity { display: flex; flex-direction: column; }
.nav__name {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    color: #fff;
    line-height: 1.2;
}
.nav__tagline {
    font-size: 0.65rem;
    color: rgba(255,255,255,0.4);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
.nav__link {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.7);
    transition: color var(--transition);
    text-decoration: none;
    padding-bottom: 2px;
    border-bottom: 1px solid transparent;
}
.nav__link:hover,
.nav__link.active {
    color: #fff;
    border-bottom-color: var(--color-gold);
}
.nav__cta { margin-left: 0.25rem; }

/* Sélecteur de langue */
.nav__lang-switcher { position: relative; }
.nav__lang-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: none;
    border: 0.5px solid rgba(255,255,255,0.25);
    color: rgba(255,255,255,0.65);
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    font-family: var(--font-body);
    transition: all var(--transition);
}
.nav__lang-btn:hover { border-color: rgba(255,255,255,0.5); color: #fff; }
.nav__lang-btn img { border-radius: 2px; }
.nav__lang-arrow { font-style: normal; font-size: 0.7rem; transition: transform var(--transition); }
.nav__lang-btn[aria-expanded="true"] .nav__lang-arrow { transform: rotate(180deg); }

.nav__lang-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--color-dark);
    border: 0.5px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-md);
    padding: 0.5rem;
    min-width: 100px;
    z-index: 200;
}
.nav__lang-dropdown.open { display: block; }
.nav__lang-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
    transition: all var(--transition);
}
.nav__lang-option:hover,
.nav__lang-option--active { background: rgba(255,255,255,0.08); color: #fff; }
.nav__lang-option img { border-radius: 2px; }

/* Burger mobile */
.nav__burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav__burger span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: rgba(255,255,255,0.8);
    transition: all var(--transition);
    border-radius: 1px;
}

/* ─── Cookie banner ──────────────────────────────────────────────────────────── */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-dark-deep);
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}
.cookie-banner__text {
    font-size: 0.825rem;
    color: rgba(255,255,255,0.75);
    flex: 1;
    min-width: 280px;
}
.cookie-banner__link { color: var(--color-gold); text-decoration: underline; }
.cookie-banner__actions { display: flex; gap: 0.5rem; flex-shrink: 0; }

/* ─── Sections ───────────────────────────────────────────────────────────────── */
.section { padding-block: var(--space-lg); }
.section--sm { padding-block: var(--space-md); }
.section--bg-alt { background: var(--color-bg-alt); }
.section--bg-dark { background: var(--color-dark); }

.section__header { margin-bottom: 2.5rem; }
.section__title { color: inherit; margin-bottom: 0.25rem; }
.section__title--light { color: #fff; }
.section__sub {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    padding-left: 2rem;
    position: relative;
}
.section__sub::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 1px;
    background: var(--color-gold);
}
.section__sub--light { color: rgba(255,255,255,0.5); }

/* ─── Cartes services ────────────────────────────────────────────────────────── */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}
.service-card {
    background: var(--color-bg-alt);
    border: 0.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: box-shadow var(--transition), transform var(--transition);
}
.service-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(44,62,80,0.08);
}
.service-card__icon {
    width: 40px;
    height: 40px;
    background: #EEF2F6;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: var(--color-dark);
}
.service-card__title {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 0.5rem;
}
.service-card__desc {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ─── Bandeau stats ──────────────────────────────────────────────────────────── */
.stats-band {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: var(--color-bg-alt);
    border-bottom: 0.5px solid var(--color-border);
    border-top: 0.5px solid var(--color-border);
}
.stat-item {
    padding: 1.5rem 1rem;
    text-align: center;
    border-right: 0.5px solid var(--color-border);
}
.stat-item:last-child { border-right: none; }
.stat-item__num {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-dark);
    display: block;
}
.stat-item__accent {
    width: 20px;
    height: 2px;
    background: var(--color-gold);
    margin: 0.4rem auto;
    border-radius: 1px;
}
.stat-item__label {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    line-height: 1.3;
}

/* ─── Engagements ────────────────────────────────────────────────────────────── */
.engagements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1px;
    background: rgba(255,255,255,0.1);
}
.engagement-item {
    padding: 2rem 1.5rem;
    background: var(--color-dark);
}
.engagement-item__icon {
    font-size: 1.4rem;
    color: var(--color-gold);
    margin-bottom: 0.75rem;
    display: block;
}
.engagement-item__title {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 0.4rem;
}
.engagement-item__desc {
    font-size: 0.825rem;
    color: rgba(255,255,255,0.55);
    line-height: 1.6;
}

/* ─── Footer ─────────────────────────────────────────────────────────────────── */
.site-footer {
    background: var(--color-dark);
    color: rgba(255,255,255,0.7);
    margin-top: auto;
}
.footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    padding-block: 3rem;
}
.footer__logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    text-decoration: none;
}
.footer__monogram {
    width: 34px;
    height: 34px;
    border: 1.5px solid var(--color-gold);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--color-gold);
    flex-shrink: 0;
}
.footer__name {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    color: #fff;
}
.footer__address {
    font-size: 0.825rem;
    color: rgba(255,255,255,0.55);
    line-height: 1.8;
    margin-bottom: 1rem;
}
.footer__address a:hover { color: var(--color-gold); }
.footer__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: rgba(255,255,255,0.5);
    border: 0.5px solid rgba(255,255,255,0.15);
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.footer__badge:hover { border-color: var(--color-gold); color: var(--color-gold); }

.footer__nav-title {
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 1rem;
}
.footer__nav ul li { margin-bottom: 0.5rem; }
.footer__nav ul li a {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.55);
    transition: color var(--transition);
}
.footer__nav ul li a:hover { color: var(--color-gold); }

.footer__hours {
    font-size: 0.825rem;
    color: rgba(255,255,255,0.55);
    line-height: 1.8;
    margin-bottom: 1rem;
}
.footer__linkedin {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 0.5px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-sm);
    color: rgba(255,255,255,0.5);
    transition: all var(--transition);
}
.footer__linkedin:hover { border-color: var(--color-gold); color: var(--color-gold); }

.footer__bottom {
    border-top: 0.5px solid rgba(255,255,255,0.08);
    padding-block: 1rem;
    background: var(--color-dark-deep);
}
.footer__bottom p {
    font-size: 0.78rem;
    color: rgba(255,255,255,0.3);
    text-align: center;
}

/* ─── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
    .footer__inner { grid-template-columns: 1fr 1fr; gap: 2rem; }
    .stats-band { grid-template-columns: repeat(2, 1fr); }
    .stat-item:nth-child(2) { border-right: none; }
}

@media (max-width: 768px) {
    .nav__links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-dark);
        flex-direction: column;
        padding: 1rem 1.5rem;
        gap: 0.75rem;
        border-top: 0.5px solid rgba(255,255,255,0.08);
    }
    .nav__links.open { display: flex; }
    .nav__burger { display: flex; }
    .nav__cta { display: none; }
    .nav__tagline { display: none; }
    .services-grid { grid-template-columns: 1fr 1fr; }
    .engagements-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 500px) {
    .services-grid { grid-template-columns: 1fr; }
    .engagements-grid { grid-template-columns: 1fr; }
    .stats-band { grid-template-columns: 1fr 1fr; }
    .footer__inner { grid-template-columns: 1fr; }
    .cookie-banner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition: none !important; animation: none !important; }
}