/* ==========================================================================
   DESIGN SYSTEM & VARIABLES
   ========================================================================== */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --text-primary: #111111;
    --text-secondary: #666666;
    --text-muted: #999999;
    --accent: #000000;
    --border-color: #e5e5e5;
    
    /* Typographie */
    --font-heading: 'Outfit', 'Inter', -apple-system, sans-serif;
    --font-body: 'Inter', -apple-system, sans-serif;
    
    /* Transitions */
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s ease;
}

/* ==========================================================================
   RESET & OUTILS
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* Evite que le header ne cache le début des sections */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

li {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

/* REND LE POINT CARRE ET PARFAITEMENT ALIGNE EN CSS */
.dot {
    display: inline-block;
    width: 0.14em;
    height: 0.14em;
    background-color: var(--accent);
    margin-left: 0.05em;
    vertical-align: baseline; /* Aligne la base du carré sur la ligne de base du texte */
    position: relative;
    bottom: 0.02em; /* Micro-ajustement pour compenser les hauteurs de ligne */
    transition: var(--transition-smooth);
}

/* ==========================================================================
   HEADER (NAVIGATION)
   ========================================================================== */
#main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-smooth);
}

#main-header.scrolled {
    padding: 10px 0;
    background-color: rgba(255, 255, 255, 0.95);
}

.header-container {
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-smooth);
}

#main-header.scrolled .header-container {
    height: 60px;
}

.logo {
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: 24px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.logo:hover .dot {
    transform: scale(1.3);
}

#nav-menu ul {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    font-family: var(--font-heading);
    font-weight: 400;
    font-size: 14px;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 8px 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--text-primary);
    transition: var(--transition-smooth);
}

.nav-link:hover::after {
    width: 100%;
}

.contact-btn {
    border: 1px solid var(--text-primary);
    padding: 8px 20px;
    border-radius: 0px;
    transition: var(--transition-smooth);
}

.contact-btn:hover {
    background-color: var(--text-primary);
    color: var(--bg-primary);
}

.contact-btn:hover .dot {
    background-color: var(--bg-primary);
}

/* Hamburguer Menu mobile */
#menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

#menu-toggle .bar {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 5px 0;
    transition: var(--transition-smooth);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
#hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background-color: var(--bg-primary);
    padding-top: 80px;
}

.hero-container {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 8vw;
    font-weight: 900;
    letter-spacing: 6px;
    text-transform: uppercase;
    line-height: 0.9;
    margin-bottom: 25px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-tagline {
    font-family: var(--font-body);
    font-size: 18px;
    font-weight: 300;
    letter-spacing: 2px;
    color: var(--text-secondary);
    text-transform: uppercase;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
}

/* Indicateur de Scroll */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    opacity: 0;
    animation: fadeIn 1s ease 1s forwards;
}

.mouse {
    width: 22px;
    height: 38px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background-color: var(--text-primary);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollMouse 1.5s infinite;
}

/* ==========================================================================
   PILLARS (SERVICES GRID)
   ========================================================================== */
#pillars {
    background-color: var(--bg-secondary);
    padding: 120px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    transition: var(--transition-smooth);
}

.pillar-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 40px 30px;
    display: flex;
    flex-direction: column;
    min-height: 340px;
    position: relative;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.pillar-card:hover,
.pillar-card.highlighted {
    transform: translateY(-8px);
    border-color: var(--text-primary);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.03);
}

.pillar-header {
    margin-bottom: 30px;
}

.pillar-card h2 {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.pillar-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-grow: 1; /* Permet de pousser le contenu mobile vers le bas */
}

.pillar-list li {
    font-size: 14px;
    font-weight: 300;
    color: var(--text-secondary);
    position: relative;
    padding-left: 0;
    transition: var(--transition-fast);
}

.pillar-card:hover .pillar-list li,
.pillar-card.highlighted .pillar-list li {
    color: var(--text-primary);
}

/* MASQUE L'IMAGE MOBILE PAR DEFAUT SUR DESKTOP */
.pillar-mobile-image {
    display: none;
}

/* ==========================================================================
   GALLERY (UNIQUEMENT LES VISUELS - DESKTOP)
   ========================================================================== */
#gallery {
    padding: 120px 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    transition: var(--transition-smooth);
}

.gallery-item {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.image-wrapper {
    width: 100%;
    height: 100%;
    transition: var(--transition-smooth);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    opacity: 0.85;
    transition: var(--transition-smooth);
}

.gallery-item:hover img,
.gallery-item.highlighted img {
    filter: grayscale(0%);
    opacity: 1;
    transform: scale(1.05);
}

.gallery-item.highlighted {
    border-color: var(--text-primary);
}

/* ==========================================================================
   INTERACTION MULTI-HOVER (JUMELAGE)
   ========================================================================== */
.pillars-grid.has-active .pillar-card:not(.highlighted) {
    opacity: 0.3;
}

.gallery-grid.has-active .gallery-item:not(.highlighted) {
    opacity: 0.3;
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
#contact {
    background-color: var(--bg-secondary);
    padding: 120px 0;
    border-top: 1px solid var(--border-color);
}

.contact-container {
    max-width: 800px;
}

.contact-header {
    text-align: center;
    margin-bottom: 50px;
}

.contact-desc {
    font-size: 16px;
    font-weight: 300;
    color: var(--text-secondary);
    margin-top: 15px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-align: center;
}

.subtitle {
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--text-muted);
    display: block;
    margin-bottom: 15px;
}

.minimal-form {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
    border: none;
    border-bottom: 1px solid #cccccc;
    background: transparent;
    padding: 12px 0;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 300;
    color: var(--text-primary);
    outline: none;
    border-radius: 0;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--text-primary);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23666666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 5px center;
    padding-right: 20px;
}

.form-submit {
    margin-top: 20px;
    text-align: center;
}

.submit-btn {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    border: 1px solid var(--text-primary);
    padding: 16px 50px;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.submit-btn:hover {
    background-color: transparent;
    color: var(--text-primary);
}

.submit-btn:hover .dot {
    background-color: var(--text-primary);
}

.form-feedback {
    text-align: center;
    font-size: 14px;
    margin-top: 15px;
    font-weight: 300;
    min-height: 24px;
}

.form-feedback.success {
    color: #2e7d32;
}

.form-feedback.error {
    color: #c62828;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
footer {
    background-color: var(--bg-primary);
    padding: 60px 0;
    border-top: 1px solid var(--border-color);
    font-size: 13px;
    font-weight: 300;
    color: var(--text-secondary);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 900;
    letter-spacing: 1px;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.footer-tagline {
    font-family: var(--font-body);
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-muted);
}

.footer-tagline .dot {
    width: 0.12em;
    height: 0.12em;
    bottom: 0.03em;
    margin-left: 0.05em;
}

.footer-right {
    text-align: right;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-right a:hover {
    text-decoration: underline;
    color: var(--text-primary);
}

.copyright {
    color: var(--text-muted);
    margin-top: 10px;
}

/* ==========================================================================
   ANIMATIONS & MEDIA QUERIES
   ========================================================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scrollMouse {
    0% {
        opacity: 1;
        top: 6px;
    }
    50% {
        opacity: 0.3;
        top: 18px;
    }
    100% {
        opacity: 1;
        top: 6px;
    }
}

/* ==========================================================================
   MEDIA QUERY: TABLETTES ET ECRANS TACTILES (<= 1024px)
   ========================================================================== */
@media (max-width: 1024px) {
    .container {
        padding: 0 30px;
    }

    /* 1. SUPPRESSION DU MENU DE NAVIGATION SUR TABLETTE & MOBILE */
    #menu-toggle {
        display: none !important;
    }

    #nav-menu {
        display: none !important;
    }

    /* Animation Hamburger */
    #menu-toggle.active .bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    #menu-toggle.active .bar:nth-child(2) {
        transform: translateY(-7px) rotate(-45deg);
    }

    /* 2. SERVICES GRID ET IMAGES MOBILES */
    .pillars-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pillar-mobile-image {
        display: block;
        margin-top: 25px;
        width: 100%;
        aspect-ratio: 1.5;
        overflow: hidden;
        border: 1px solid var(--border-color);
        transition: var(--transition-smooth);
    }

    .pillar-mobile-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        filter: grayscale(100%);
        opacity: 0.9;
        transition: var(--transition-smooth);
    }

    /* Couleur au clic */
    .pillar-card:active .pillar-mobile-image img,
    .pillar-card.highlighted .pillar-mobile-image img {
        filter: grayscale(0%);
        opacity: 1;
    }

    #gallery {
        display: none; /* Masque la galerie du bas */
    }
}

/* ==========================================================================
   MEDIA QUERY: SMARTPHONES (<= 768px)
   ========================================================================== */
@media (max-width: 768px) {
    .container {
        padding: 0 24px;
    }

    #nav-menu {
        padding: 40px 24px;
        top: 80px; /* Force la position par défaut */
    }

    /* ALIGNEMENT COMPLET ET PROPRE AU FER A GAUCHE SUR SMARTPHONE */
    #hero {
        align-items: center;
        justify-content: flex-start; /* Aligne le flex-child à gauche */
    }

    .hero-container {
        align-items: flex-start;
        text-align: left;
        width: 100%;
        padding: 0 24px !important; /* Force l'alignement sur les marges standard de 24px */
    }

    .hero-title {
        font-size: 12vw;
        text-align: left;
        margin-left: 0;
        width: 100%;
    }

    .hero-tagline {
        text-align: left;
        font-size: 14px;
        width: 100%;
        letter-spacing: 1px;
    }

    .pillars-grid {
        grid-template-columns: 1fr; /* 1 colonne sur smartphone */
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-container {
        flex-direction: column;
        gap: 30px;
        text-align: left;
    }

    .footer-right {
        text-align: left;
        width: 100%;
    }
}