/* SIA — Galerie d'Art — Luxe / Chic */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --black:#0a0a0a;--white:#fafafa;--gold:#c9a96e;--gold-light:#d4ba8a;
  --gray:#888;--bg:#f5f3ef;--card-bg:#fff;--border:#e0ddd7;
  --font-heading:'Playfair Display',Georgia,serif;
  --font-body:'Inter',Helvetica,Arial,sans-serif;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-body);color:var(--black);background:var(--bg);line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .3s}
img{max-width:100%;display:block}
h1,h2,h3,h4{font-family:var(--font-heading);font-weight:400;line-height:1.2}

/* NAV */
.navbar{position:fixed;top:0;left:0;width:100%;z-index:100;padding:24px 5%;display:flex;align-items:center;justify-content:space-between;transition:all .4s ease}
.navbar.scrolled{background:rgba(10,10,10,.95);padding:14px 5%;backdrop-filter:blur(10px)}
.nav-logo{font-family:var(--font-heading);font-size:28px;color:var(--white);letter-spacing:6px;text-transform:uppercase}
.nav-links{display:flex;gap:32px;list-style:none}
.nav-links a{color:rgba(255,255,255,.85);font-size:13px;letter-spacing:2px;text-transform:uppercase;font-weight:500;transition:color .3s}
.nav-links a:hover,.nav-links a.active{color:var(--gold)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;z-index:200}
.hamburger span{display:block;width:26px;height:2px;background:var(--white);transition:all .3s}
.hamburger.open span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
.mobile-menu{position:fixed;top:0;left:0;width:100%;height:100vh;background:rgba(10,10,10,.97);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:32px;z-index:150;opacity:0;pointer-events:none;transition:opacity .4s}
.mobile-menu.open{opacity:1;pointer-events:all}
.mobile-menu a{color:var(--white);font-size:20px;letter-spacing:3px;text-transform:uppercase;font-family:var(--font-heading)}
.mobile-menu a:hover{color:var(--gold)}

/* HERO */
.hero{position:relative;height:100vh;min-height:600px;display:flex;align-items:center;justify-content:center;text-align:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;background-repeat:no-repeat}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(to bottom,rgba(10,10,10,.45),rgba(10,10,10,.7))}
.hero-content{position:relative;z-index:2;max-width:800px;padding:0 5%}
.hero h1{font-size:clamp(36px,6vw,72px);color:var(--white);letter-spacing:4px;text-transform:uppercase;margin-bottom:16px}
.hero p{color:rgba(255,255,255,.8);font-size:clamp(14px,1.6vw,18px);letter-spacing:2px;margin-bottom:32px}
.hero-line{width:60px;height:1px;background:var(--gold);margin:0 auto 24px}
.btn{display:inline-block;padding:14px 40px;font-size:12px;letter-spacing:3px;text-transform:uppercase;font-weight:600;border:1px solid var(--gold);color:var(--gold);transition:all .3s}
.btn:hover{background:var(--gold);color:var(--black)}
.btn-filled{background:var(--gold);color:var(--black)}
.btn-filled:hover{background:var(--gold-light)}

/* SECTIONS */
.section{padding:100px 5%}
.section-title{text-align:center;margin-bottom:60px}
.section-title h2{font-size:clamp(28px,3.5vw,42px);letter-spacing:3px;text-transform:uppercase;margin-bottom:12px}
.section-title .line{width:50px;height:1px;background:var(--gold);margin:0 auto}

/* GRID OEUVRES */
.works-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:1200px;margin:0 auto}
.work-card{position:relative;overflow:hidden;cursor:pointer;aspect-ratio:3/4;background:var(--border)}
.work-card img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.work-card:hover img{transform:scale(1.05)}
.work-card .overlay{position:absolute;inset:0;background:linear-gradient(transparent 40%,rgba(10,10,10,.8));display:flex;flex-direction:column;justify-content:flex-end;padding:24px;opacity:0;transition:opacity .4s}
.work-card:hover .overlay{opacity:1}
.work-card .overlay h3{color:var(--white);font-size:18px;letter-spacing:1px;margin-bottom:4px}
.work-card .overlay span{color:var(--gold);font-size:13px;letter-spacing:1px}

/* ABOUT SECTION */
.about-section{display:grid;grid-template-columns:1fr 1fr;gap:60px;max-width:1200px;margin:0 auto;align-items:center}
.about-img{aspect-ratio:4/5;overflow:hidden}
.about-img img{width:100%;height:100%;object-fit:cover}
.about-text h2{font-size:clamp(28px,3vw,38px);letter-spacing:2px;text-transform:uppercase;margin-bottom:20px}
.about-text .gold-line{width:40px;height:1px;background:var(--gold);margin-bottom:24px}
.about-text p{color:#555;font-size:15px;line-height:1.8;margin-bottom:16px}

/* CONTACT */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;max-width:1100px;margin:0 auto}
.contact-info{display:flex;flex-direction:column;gap:32px}
.contact-item{display:flex;align-items:flex-start;gap:16px}
.contact-icon{width:48px;height:48px;min-width:48px;border:1px solid var(--gold);display:flex;align-items:center;justify-content:center}
.contact-icon svg{width:20px;height:20px;stroke:var(--gold);fill:none;stroke-width:1.5}
.contact-item h4{font-size:14px;letter-spacing:2px;text-transform:uppercase;margin-bottom:4px}
.contact-item p{color:var(--gray);font-size:14px}
.map-container{aspect-ratio:1;overflow:hidden;border:1px solid var(--border)}
.map-container iframe{width:100%;height:100%;border:0}

/* GALERIE PAGE */
.gallery-hero{height:50vh;min-height:300px;display:flex;align-items:center;justify-content:center;background:var(--black);position:relative}
.gallery-hero h1{color:var(--white);font-size:clamp(32px,5vw,56px);letter-spacing:6px;text-transform:uppercase;z-index:2}
.gallery-hero::after{content:'';position:absolute;bottom:0;left:0;width:100%;height:1px;background:var(--gold)}
.masonry{columns:3;column-gap:16px;max-width:1300px;margin:0 auto}
.masonry-item{break-inside:avoid;margin-bottom:16px;cursor:pointer;overflow:hidden;position:relative}
.masonry-item img{width:100%;display:block;transition:transform .5s ease}
.masonry-item:hover img{transform:scale(1.03)}
.masonry-item .caption{position:absolute;bottom:0;left:0;right:0;padding:16px 20px;background:linear-gradient(transparent,rgba(10,10,10,.7));color:var(--white);font-size:13px;letter-spacing:1px;opacity:0;transition:opacity .4s}
.masonry-item:hover .caption{opacity:1}

/* LIGHTBOX */
.lightbox{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(10,10,10,.95);display:flex;align-items:center;justify-content:center;z-index:9999;opacity:0;transition:opacity .3s}
.lightbox.active{opacity:1}
.lightbox img{max-width:90%;max-height:90%;object-fit:contain}
.lightbox-close{position:absolute;top:24px;right:24px;color:var(--white);font-size:36px;cursor:pointer;font-family:var(--font-body);line-height:1}

/* FOOTER */
.footer{background:var(--black);color:rgba(255,255,255,.6);padding:48px 5%;text-align:center}
.footer-logo{font-family:var(--font-heading);font-size:24px;color:var(--white);letter-spacing:4px;text-transform:uppercase;margin-bottom:16px}
.footer p{font-size:13px;letter-spacing:1px}
.footer a{color:var(--gold);transition:color .3s}
.footer a:hover{color:var(--gold-light)}

/* ABOUT PAGE */
.page-hero{height:50vh;min-height:300px;display:flex;align-items:center;justify-content:center;background:var(--black);position:relative}
.page-hero h1{color:var(--white);font-size:clamp(32px,5vw,56px);letter-spacing:6px;text-transform:uppercase;z-index:2}
.page-hero::after{content:'';position:absolute;bottom:0;left:0;width:100%;height:1px;background:var(--gold)}
.page-content{max-width:900px;margin:0 auto;padding:80px 5%}
.page-content h2{font-size:clamp(24px,3vw,34px);letter-spacing:2px;text-transform:uppercase;margin-bottom:16px}
.page-content .gold-line{width:40px;height:1px;background:var(--gold);margin-bottom:24px}
.page-content p{color:#555;font-size:15px;line-height:1.9;margin-bottom:20px}
.page-content-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;max-width:1200px;margin:0 auto;padding:80px 5%;align-items:center}
.page-content-grid img{width:100%;aspect-ratio:4/5;object-fit:cover}

/* ADMIN */
.admin-login{max-width:400px;margin:120px auto;padding:40px;background:var(--card-bg);border:1px solid var(--border)}
.admin-login h2{font-family:var(--font-heading);font-size:24px;text-align:center;letter-spacing:2px;margin-bottom:24px}
.admin-login input{width:100%;padding:12px 16px;margin-bottom:16px;border:1px solid var(--border);font-size:14px;font-family:var(--font-body)}
.admin-login button{width:100%;padding:14px;background:var(--gold);color:var(--black);border:none;font-size:13px;letter-spacing:2px;text-transform:uppercase;cursor:pointer;font-weight:600}
.admin-panel{max-width:700px;margin:60px auto;padding:40px;background:var(--card-bg);border:1px solid var(--border);display:none}
.admin-panel h2{font-family:var(--font-heading);font-size:24px;text-align:center;letter-spacing:2px;margin-bottom:12px}
.admin-panel p{text-align:center;color:var(--gray);font-size:14px;margin-bottom:32px}
.domain-btn{display:block;width:100%;padding:16px;background:var(--gold);color:var(--black);border:none;font-size:14px;letter-spacing:2px;text-transform:uppercase;cursor:pointer;font-weight:600;text-align:center;margin-top:16px;transition:background .3s}
.domain-btn:hover{background:var(--gold-light)}

/* RESPONSIVE */
@media(max-width:1024px){
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .masonry{columns:2}
  .about-section,.contact-grid,.page-content-grid{grid-template-columns:1fr;gap:40px}
}
@media(max-width:768px){
  .nav-links{display:none}
  .hamburger{display:flex}
  .works-grid{grid-template-columns:1fr 1fr;gap:12px}
  .masonry{columns:2;column-gap:10px}
  .section{padding:60px 5%}
  .work-card .overlay{opacity:1}
  .masonry-item .caption{opacity:1}
  .hero{min-height:500px}
}
@media(max-width:480px){
  .works-grid{grid-template-columns:1fr}
  .masonry{columns:1}
}