/* ============================================
   ROBERT PHAN – SITE COMPLET
   Design System: Lumière & Modernité
   ============================================ */

/* --- RESET & BASE --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#fafaf8;
  --white:#ffffff;
  --ink:#1a1a2e;
  --indigo:#3d3b8e;
  --indigo-dark:#2e2c6e;
  --plum:#6b4c8a;
  --violet-light:#9b8ab8;
  --rose:#c4727f;
  --warm-gray:#f0ede8;
  --text:#3a3a4a;
  --text-light:#8a8a9a;
  --text-dim:#b0b0be;
  --border:#e8e6e2;
  --border-light:#f0eee9;
  --shadow:0 4px 30px rgba(26,26,46,.06);
  --shadow-md:0 8px 40px rgba(26,26,46,.08);
  --shadow-lg:0 16px 60px rgba(26,26,46,.12);
  --radius:8px;
  --radius-lg:12px;
  --max-w:1140px;
  --transition:all .3s ease;
}
html{scroll-behavior:smooth}
body{font-family:'Outfit',sans-serif;color:var(--text);background:var(--bg);line-height:1.7;font-weight:400;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit}

/* --- TYPOGRAPHY --- */
.t-serif{font-family:'Fraunces',serif}
.t-label{font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;color:var(--indigo);font-weight:600}
.t-heading{font-family:'Fraunces',serif;font-size:2.6rem;color:var(--ink);font-weight:300;line-height:1.2}
.t-heading strong{font-weight:700}
.t-body{font-size:1rem;color:var(--text);line-height:2;font-weight:300}

/* --- BUTTONS --- */
.btn{font-family:'Outfit',sans-serif;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;font-weight:600;text-decoration:none;padding:.85rem 2rem;border-radius:var(--radius);transition:var(--transition);cursor:pointer;border:none;display:inline-block;text-align:center}
.btn--primary{background:var(--indigo);color:#fff}
.btn--primary:hover{background:var(--plum);transform:translateY(-2px);box-shadow:0 8px 25px rgba(61,59,142,.25)}
.btn--secondary{background:var(--white);color:var(--indigo);border:1.5px solid var(--border)}
.btn--secondary:hover{border-color:var(--indigo)}
.btn--dark{background:var(--ink);color:#fff}
.btn--dark:hover{background:var(--indigo)}
.btn--full{width:100%}

/* --- LAYOUT --- */
.container{max-width:var(--max-w);margin:0 auto;padding-left:2rem;padding-right:2rem}
.section{padding:6rem 2rem}
.section--alt{background:var(--white)}
.section--warm{background:var(--warm-gray)}
.section--dark{background:var(--ink);color:#fff}
.section__header{text-align:center;margin-bottom:3.5rem}

/* --- NAV --- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(250,250,248,.92);backdrop-filter:blur(20px);border-bottom:1px solid var(--border)}
.nav__inner{max-width:var(--max-w);margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:.9rem 2rem}
.nav__logo{font-family:'Fraunces',serif;font-size:1.3rem;color:var(--ink);text-decoration:none;font-weight:600}
.nav__logo span{color:var(--indigo)}
.nav__links{display:flex;gap:2rem;list-style:none;align-items:center}
.nav__links a{color:var(--text-light);text-decoration:none;font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;font-weight:500;transition:color .3s;position:relative}
.nav__links a:hover,.nav__links a.active{color:var(--indigo)}
.nav__links a.active::after{content:'';position:absolute;bottom:-4px;left:0;right:0;height:2px;background:var(--indigo);border-radius:2px}
.nav__hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.nav__hamburger span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}
.nav__mobile-menu{display:none;position:fixed;top:60px;left:0;right:0;background:var(--white);border-bottom:1px solid var(--border);padding:1.5rem 2rem;list-style:none;box-shadow:var(--shadow-md)}
.nav__mobile-menu.open{display:flex;flex-direction:column;gap:1rem}
.nav__mobile-menu a{color:var(--text);text-decoration:none;font-size:.9rem;font-weight:500;padding:.5rem 0}

/* --- FOOTER --- */
.footer{padding:4rem 2rem 2rem;background:var(--ink);color:rgba(255,255,255,.5)}
.footer__inner{max-width:var(--max-w);margin:0 auto;display:grid;grid-template-columns:1fr 1fr 1fr;gap:3rem;padding-bottom:3rem;border-bottom:1px solid rgba(255,255,255,.08)}
.footer__col h4{font-family:'Fraunces',serif;font-size:1rem;color:var(--white);margin-bottom:1rem;font-weight:500}
.footer__col p{font-size:.85rem;line-height:1.8;font-weight:300}
.footer__col ul{list-style:none}
.footer__col ul li{margin-bottom:.4rem}
.footer__col ul a{color:rgba(255,255,255,.5);text-decoration:none;font-size:.85rem;transition:color .3s;font-weight:300}
.footer__col ul a:hover{color:var(--white)}
.footer__bottom{max-width:var(--max-w);margin:0 auto;padding-top:1.5rem;display:flex;align-items:center;justify-content:space-between}
.footer__logo{font-family:'Fraunces',serif;font-size:1rem;color:var(--white);font-weight:500}
.footer__copy{font-size:.72rem;color:rgba(255,255,255,.3);letter-spacing:.04em}

/* --- BREADCRUMB --- */
.breadcrumb{padding:1rem 0;font-size:.8rem;color:var(--text-light)}
.breadcrumb a{color:var(--text-light);text-decoration:none;transition:color .3s}
.breadcrumb a:hover{color:var(--indigo)}
.breadcrumb span{margin:0 .5rem;opacity:.5}

/* --- QUOTE --- */
.quote-section{padding:5rem 2rem;background:var(--white);border-top:1px solid var(--border);border-bottom:1px solid var(--border);text-align:center}
.quote-section__text{font-family:'Fraunces',serif;font-size:1.5rem;font-style:italic;color:var(--ink);max-width:650px;margin:0 auto;line-height:1.6;font-weight:300}
.quote-section__text mark{background:linear-gradient(to top,rgba(61,59,142,.1) 40%,transparent 40%);color:inherit}
.quote-section__attr{margin-top:1.2rem;font-size:.75rem;color:var(--text-light);letter-spacing:.15em;text-transform:uppercase;font-weight:500}

/* --- CARDS --- */
.card{background:var(--bg);border-radius:var(--radius-lg);border:1px solid transparent;transition:var(--transition);overflow:hidden}
.card:hover{border-color:var(--border);box-shadow:var(--shadow-md);transform:translateY(-4px)}

/* --- FORMS --- */
.form{}
.fg{margin-bottom:1.4rem}
.fg label{display:block;font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--text-light);margin-bottom:.4rem;font-weight:500}
.fg input,.fg textarea,.fg select{width:100%;padding:.85rem 1rem;font-family:'Outfit',sans-serif;font-size:.95rem;background:var(--white);border:1px solid var(--border);color:var(--ink);border-radius:var(--radius);transition:var(--transition);font-weight:400}
.fg input:focus,.fg textarea:focus{outline:none;border-color:var(--indigo);box-shadow:0 0 0 3px rgba(61,59,142,.08)}
.fg textarea{resize:vertical;min-height:140px}

/* --- ANIMATIONS --- */
.reveal{opacity:0;transform:translateY(25px);transition:all .7s cubic-bezier(.22,1,.36,1)}
.reveal.v{opacity:1;transform:translateY(0)}

/* --- BACK TO TOP --- */
.btt{position:fixed;bottom:2rem;right:2rem;width:42px;height:42px;background:var(--indigo);color:#fff;border:none;border-radius:50%;font-size:1.1rem;cursor:pointer;opacity:0;transition:var(--transition);z-index:50;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 15px rgba(61,59,142,.3)}
.btt.show{opacity:1}
.btt:hover{background:var(--plum);transform:scale(1.08)}

/* --- RESPONSIVE --- */
@media(max-width:900px){
  .nav__links{display:none}
  .nav__hamburger{display:flex}
  .footer__inner{grid-template-columns:1fr}
  .footer__bottom{flex-direction:column;gap:.5rem;text-align:center}
  .t-heading{font-size:2rem}
}
@media(max-width:600px){
  .section{padding:4rem 1.5rem}
  .t-heading{font-size:1.7rem}
  .container{padding-left:1.5rem;padding-right:1.5rem}
}