/* --- VARIABLES & DESIGN SYSTEM --- */
:root {
    --primary-color: #1a1a1a;
    --accent-color: #c5a059; /* Doré luxe */
    --accent-hover: #a3844a;
    --bg-light: #f9f9f9;
    --text-main: #4a4a4a;
    --text-muted: #888;
    --white: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.95);
    --transition-smooth: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    --shadow-soft: 0 10px 30px rgba(0,0,0,0.05);
    --header-height: 80px;
}

/* --- BASE --- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.8;
    color: var(--text-main);
    background-color: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .serif {
    font-family: 'Playfair Display', serif;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

img { max-width: 100%; height: auto; display: block; }

/* --- HEADER & NAVIGATION --- */
header {
    position: fixed;
    top: 0; width: 100%;
    height: var(--header-height);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    padding: 0 5%;
    z-index: 2000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 1px 0 rgba(0,0,0,0.05);
}

.logo {
    font-family: 'Playfair Display', serif;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
}

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

/* Desktop Menu */
.menu {
    list-style: none;
    display: flex;
    gap: 35px;
    align-items: center;
}

.menu > li > a {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 500;
    color: var(--primary-color);
}

.menu > li > a:hover { color: var(--accent-color); }

/* Dropdown */
.dropdown { position: relative; }
.submenu {
    position: absolute;
    top: 100%; left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--white);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    box-shadow: var(--shadow-soft);
    list-style: none;
    padding: 15px 0;
    transition: var(--transition-smooth);
    border-top: 2px solid var(--accent-color);
}

.dropdown:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.submenu li a {
    padding: 10px 25px;
    display: block;
    font-size: 13px;
    color: var(--text-main);
}

.submenu li a:hover { background: var(--bg-light); color: var(--accent-color); }

/* Mobile Menu Toggle */
.burger {
    display: none;
    cursor: pointer;
    background: none;
    border: none;
    padding: 10px;
}

.burger span {
    display: block;
    width: 25px;
    height: 1px;
    background: var(--primary-color);
    margin: 6px 0;
    transition: var(--transition-smooth);
}

/* --- HERO CARROUSEL --- */
.hero-carousel {
    height: 100vh;
    width: 100%;
    position: relative;
    overflow: hidden;
    background: #fdfdfd;
}

.hero-carousel img {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
}

.hero-carousel img.active {
    opacity: 1;
}

.hero-content {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--white);
    z-index: 10;
    width: 90%;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.hero-content h1 {
    color: var(--white);
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s forwards 0.5s;
}

.hero-content p {
    font-size: 1.2rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s forwards 0.8s;
}

@keyframes fadeInUp {
    to { opacity: 1; transform: translateY(0); }
}

/* --- GALLERY --- */
.thumbnail-gallery {
    columns: 3 350px;
    column-gap: 20px;
    padding: 80px 5%;
    max-width: 1600px;
    margin: 0 auto;
}

.thumbnail-gallery img {
    width: 100%;
    height: auto;
    margin-bottom: 20px;
    break-inside: avoid;
    cursor: pointer;
    transition: var(--transition-smooth);
    filter: grayscale(20%);
    display: block;
}

.thumbnail-gallery img:hover {
    filter: grayscale(0);
    transform: translateY(-5px);
    box-shadow: var(--shadow-soft);
}

/* --- SECTIONS & CONTAINERS --- */
.container {
    max-width: 1100px;
    margin: calc(var(--header-height) + 60px) auto 100px;
    padding: 0 5%;
}

.section-title {
    text-align: center;
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: 60px;
    position: relative;
    padding-bottom: 20px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0; left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: var(--accent-color);
}

.about-hero {
    padding: 60px 0;
}

.profile-img {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto;
    border: 8px solid var(--white);
    box-shadow: var(--shadow-soft);
    transition: var(--transition-smooth);
}

.profile-img:hover {
    transform: scale(1.05);
}

.tagline {
    max-width: 600px;
    margin: 30px auto 0;
    line-height: 1.4;
}

.portrait-chinois {
    background: var(--bg-light);
    padding: 60px 40px;
    border-top: 1px solid var(--accent-color);
    border-bottom: 1px solid var(--accent-color);
    margin: 80px 0;
    text-align: center;
}

/* --- FAQ ACCORDION --- */
.faq-accordion {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid #eee;
    padding: 20px 0;
}

.faq-question {
    font-size: 1.3rem;
    cursor: pointer;
    list-style: none;
    position: relative;
    padding-right: 40px;
    transition: var(--transition-smooth);
}

.faq-question::-webkit-details-marker { display: none; }

.faq-question::after {
    content: '+';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--accent-color);
    transition: var(--transition-smooth);
}

details[open] .faq-question::after {
    content: '-';
    transform: translateY(-50%) rotate(180deg);
}

.faq-answer {
    padding: 20px 0;
    color: var(--text-muted);
    line-height: 1.6;
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- FORMS --- */
.form-wrapper {
    background: var(--bg-light);
    padding: 60px;
    border-radius: 4px;
    box-shadow: var(--shadow-soft);
}

/* --- FOOTER --- */
footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 100px 5% 50px;
    text-align: center;
}

.footer-socials {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-socials a {
    opacity: 0.7;
}

.footer-socials a:hover {
    opacity: 1;
    transform: translateY(-10px);
}

.footer-socials img {
    width: 32px;
    filter: invert(1);
}

.client-access {
    max-width: 400px;
    margin: 0 auto 60px;
    padding: 40px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
}

.client-access input {
    width: 100%;
    padding: 15px;
    margin-bottom: 15px;
    background: transparent;
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--white);
    font-family: inherit;
}

.btn-submit {
    background: var(--accent-color);
    color: var(--white);
    border: none;
    padding: 15px 30px;
    cursor: pointer;
    width: 100%;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.btn-submit:hover { background: var(--accent-hover); }

.seo-footer {
    padding: 80px 5%;
    background: var(--white);
    text-align: center;
}

.seo-footer h2 { margin-bottom: 30px; font-size: 1.8rem; }
.seo-footer p { color: var(--text-muted); max-width: 800px; margin: 0 auto; }

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
    .menu { display: none; }
    .burger { display: block; }
    
    .menu.active {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background: var(--white);
        padding: 50px;
        z-index: 1500;
        gap: 30px;
    }

    .menu.active > li > a { font-size: 18px; }
    
    .dropdown:hover .submenu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        padding-left: 20px;
        display: block;
    }

    .burger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .burger.active span:nth-child(2) { opacity: 0; }
    .burger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    .thumbnail-gallery { columns: 2 250px; }
}

@media (max-width: 600px) {
    .container { margin-top: 40px; }
    .hero-content h1 { font-size: 2.5rem; }
    .thumbnail-gallery { columns: 1; }
}