/* ==========================================================================
   1. VARIABLES GLOBALES & IDENTITY SYSTEM (Mis à jour selon la DA)
   ========================================================================== */
:root {
    --color-bordeaux: #6D071A;
    /* Ruby Red principal */
    --color-dark: #1A1817;
    /* Charbon / Luxe épuré */
    --color-sable: #F5F1ED;
    /* Fond doux, organique et chaud */
    --color-soie: #FFFFFF;
    /* Pureté éclatante */
    --color-text-muted: #A49F9B;
    /* Gris chaud adouci */

    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Montserrat', sans-serif;
    --container-width: 1200px;
}

/* ==========================================================================
   2. BASES SYSTEM & RESET
   ========================================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: #FFFFFF;
    /* Rupture blanche par défaut, la Home gère ses sections */
    color: var(--color-dark);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-heading);
    color: var(--color-dark);
    font-weight: 400;
    /* Standard luxe : titles légers, pas de gras excessif */
}

/* Utilitaires structurels */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.container-sm {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

.text-center {
    text-align: center;
}

.bg-light {
    background-color: var(--color-sable);
}

.bg-dark {
    background-color: var(--color-dark);
    color: #FFFFFF;
}

.section-padding {
    padding: 120px 0;
}

/* En-tête partagé des sections de la Home */
.section-header {
    margin-bottom: 80px;
}

.section-meta-tag {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-bordeaux);
    display: block;
    margin-bottom: 12px;
}

.section-main-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    color: var(--color-dark);
    line-height: 1.2;
    margin-bottom: 20px;
}

.section-title-line {
    width: 60px;
    height: 1px;
    background-color: var(--color-bordeaux);
    margin: 0 auto;
}

/* ==========================================================================
   3. UTILS BOUTONS
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 36px;
    text-decoration: none;
    text-transform: uppercase;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 2px;
    transition: all 0.3s ease-in-out;
    cursor: pointer;
}

.btn-premium-ruby {
    background: var(--color-bordeaux);
    color: var(--color-soie);
    border: 1px solid var(--color-bordeaux);
}

.btn-premium-ruby:hover {
    background: #4a0512;
    border-color: #4a0512;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.btn-premium-ruby .material-symbols-outlined {
    font-size: 18px;
    transition: transform 0.3s ease;
}

.btn-premium-ruby:hover .material-symbols-outlined {
    transform: translateX(5px);
}

/* ==========================================================================
   4. STRUCTURE GLOBALE : HEADER SÉMANTIQUE
   ========================================================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 30px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Sticky state transition */
.site-header.is-sticky {
    background: rgba(245, 241, 237, 0.92); /* Sable satin */
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding: 16px 0;
    box-shadow: 0 4px 30px rgba(26, 24, 23, 0.04);
    border-bottom: 1px solid rgba(26, 24, 23, 0.05);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    text-decoration: none;
    letter-spacing: 1px;
    color: var(--color-soie);
    font-weight: 700;
    transition: color 0.4s ease;
}

.site-header.is-sticky .logo-text {
    color: var(--color-dark);
}

.logo-text span {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 0.9rem;
    letter-spacing: 3px;
    color: var(--color-sable);
    margin-left: 4px;
    transition: color 0.4s ease;
}

.site-header.is-sticky .logo-text span {
    color: var(--color-bordeaux);
}

.main-navigation ul {
    display: flex;
    list-style: none;
    gap: 36px;
    align-items: center;
}

.main-navigation li {
    position: relative;
}

.main-navigation a {
    text-decoration: none;
    color: var(--color-soie);
    text-transform: uppercase;
    font-size: 0.82rem;
    letter-spacing: 1.5px;
    transition: color 0.4s ease, background-color 0.4s ease, border-color 0.4s ease;
    padding: 8px 0;
    display: block;
}

.site-header.is-sticky .main-navigation a {
    color: var(--color-dark);
}

.main-navigation a:hover {
    color: var(--color-sable);
}

.site-header.is-sticky .main-navigation a:hover {
    color: var(--color-bordeaux);
}

/* --- DROPDOWN SUBMENU FOR PRESTATIONS --- */
.main-navigation ul li .sub-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translate3d(-50%, 15px, 0);
    background-color: var(--color-soie);
    border: 1px solid rgba(26, 24, 23, 0.08);
    min-width: 280px;
    padding: 12px 0;
    box-shadow: 0 10px 30px rgba(26, 24, 23, 0.08);
    display: flex;
    flex-direction: column;
    gap: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    z-index: 99;
}

.main-navigation ul li .sub-menu li {
    width: 100%;
}

.main-navigation ul li .sub-menu a {
    color: var(--color-dark) !important;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 12px 24px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    transition: all 0.3s ease;
    text-align: left;
    display: block;
}

.main-navigation ul li .sub-menu a:hover {
    background-color: var(--color-sable);
    color: var(--color-bordeaux) !important;
    padding-left: 30px;
}

.main-navigation ul li:hover .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translate3d(-50%, 0, 0);
}

/* --- CONTACT CTA BUTTON ACTION --- */
.main-navigation ul > li:last-child {
    margin-left: 12px;
}

.main-navigation ul > li:last-child a {
    background-color: var(--color-bordeaux) !important;
    color: var(--color-soie) !important;
    padding: 12px 24px;
    border: 1px solid var(--color-bordeaux);
    font-weight: 600;
    letter-spacing: 1.5px;
    transition: all 0.3s ease;
    display: inline-block;
}

.main-navigation ul > li:last-child a:hover {
    background-color: var(--color-dark) !important;
    border-color: var(--color-dark);
    color: var(--color-soie) !important;
}

/* Sticky state header buttons overrides */
.site-header.is-sticky .main-navigation ul > li:last-child a {
    background-color: var(--color-bordeaux) !important;
    color: var(--color-soie) !important;
    border-color: var(--color-bordeaux);
}

.site-header.is-sticky .main-navigation ul > li:last-child a:hover {
    background-color: var(--color-dark) !important;
    border-color: var(--color-dark);
}

/* ==========================================================================
   5. STRUCTURE GLOBALE : FOOTER SÉMANTIQUE
   ========================================================================== */
.site-footer {
    background: var(--color-sable);
    color: var(--color-dark);
    padding: 80px 0 40px 0;
    border-top: 1px solid rgba(26, 24, 23, 0.05);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
    text-align: center;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--color-dark);
    letter-spacing: 1px;
}

.footer-navigation {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}

.footer-nav-separator {
    color: rgba(26, 24, 23, 0.15);
    font-size: 0.8rem;
    user-select: none;
}

.footer-navigation a {
    text-decoration: none;
    color: #55514E;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1.5px;
    transition: color 0.3s ease;
}

.footer-navigation a:hover {
    color: var(--color-bordeaux);
}

.footer-credits {
    width: 100%;
    border-top: 1px solid rgba(26, 24, 23, 0.08);
    padding-top: 30px;
    margin-top: 20px;
}

.footer-credits p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 300;
    margin-bottom: 8px;
}

.developer-info {
    margin-top: 20px;
    font-size: 0.75rem;
    line-height: 1.6;
    color: var(--color-text-muted);
}

.developer-info strong {
    color: var(--color-dark);
}

.developer-info a {
    color: var(--color-bordeaux);
    text-decoration: none;
    transition: color 0.3s ease;
}

.developer-info a:hover {
    color: var(--color-dark);
    text-decoration: underline;
}

.developer-info p {
    margin: 4px 0 !important;
    font-size: 0.75rem !important;
    color: var(--color-text-muted) !important;
}

@media (max-width: 767px) {
    .main-navigation {
        display: none;
    }

    .footer-navigation {
        flex-direction: column;
        gap: 10px;
    }
    
    .footer-nav-separator {
        display: none;
    }
}

/* ==========================================================================
   6. PREMIUM SCROLL REVEAL & STAGGER SYSTEM
   ========================================================================== */
.reveal {
    opacity: 0;
    transition: opacity 1.2s cubic-bezier(0.215, 0.61, 0.355, 1);
    will-change: opacity;
}

.reveal.reveal-visible {
    opacity: 1;
}

.reveal-up {
    opacity: 0;
    transform: translate3d(0, 50px, 0);
    transition: opacity 1.2s cubic-bezier(0.215, 0.61, 0.355, 1), 
                transform 1.2s cubic-bezier(0.215, 0.61, 0.355, 1);
    will-change: opacity, transform;
}

.reveal-up.reveal-visible {
    opacity: 1;
    transform: translate3d(0, 0, 0);
}

.reveal-left {
    opacity: 0;
    transform: translate3d(-50px, 0, 0);
    transition: opacity 1.2s cubic-bezier(0.215, 0.61, 0.355, 1), 
                transform 1.2s cubic-bezier(0.215, 0.61, 0.355, 1);
    will-change: opacity, transform;
}

.reveal-left.reveal-visible {
    opacity: 1;
    transform: translate3d(0, 0, 0);
}

.reveal-right {
    opacity: 0;
    transform: translate3d(50px, 0, 0);
    transition: opacity 1.2s cubic-bezier(0.215, 0.61, 0.355, 1), 
                transform 1.2s cubic-bezier(0.215, 0.61, 0.355, 1);
    will-change: opacity, transform;
}

.reveal-right.reveal-visible {
    opacity: 1;
    transform: translate3d(0, 0, 0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.96);
    transition: opacity 1.2s cubic-bezier(0.215, 0.61, 0.355, 1), 
                transform 1.2s cubic-bezier(0.215, 0.61, 0.355, 1);
    will-change: opacity, transform;
}

.reveal-scale.reveal-visible {
    opacity: 1;
    transform: scale(1);
}

/* Stagger Animations */
.reveal-stagger-item {
    opacity: 0;
    transform: translate3d(0, 30px, 0);
    transition: opacity 0.8s cubic-bezier(0.215, 0.61, 0.355, 1), 
                transform 0.8s cubic-bezier(0.215, 0.61, 0.355, 1);
    transition-delay: calc(var(--stagger-index, 0) * 0.12s);
    will-change: opacity, transform;
}

.reveal-stagger-item.reveal-visible {
    opacity: 1;
    transform: translate3d(0, 0, 0);
}