/* ChimieLycée - Complete Styles */
*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#065F46;--primary-dark:#047857;--accent:#10B981;--bg:#f8fafc;--bg-white:#ffffff;--text:#1e293b;--text-light:#64748b;--border:#e5e7eb;--tag-bg:#ECFDF5;--shadow:0 2px 8px rgba(0,0,0,0.08);--shadow-hover:0 8px 24px rgba(6,95,70,0.15)}
body{font-family:'Inter','Segoe UI',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;min-height:100vh;display:flex;flex-direction:column}

/* Header */
.header{background:linear-gradient(135deg,#065F46 0%,#047857 100%);padding:0;position:sticky;top:0;z-index:100;box-shadow:0 2px 10px rgba(0,0,0,0.15)}
.header-inner{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:0.75rem 2rem}
.logo{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-size:1.35rem;font-weight:700}
.logo svg{width:36px;height:36px}
.logo span{font-family:'Plus Jakarta Sans',sans-serif}
.nav{display:flex;align-items:center;gap:1.75rem}
.nav a{color:#d1fae5;text-decoration:none;font-weight:500;font-size:0.92rem;transition:color 0.2s}
.nav a:hover{color:#fff}
.nav a.active{color:#fff;font-weight:600}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}
.hamburger span{display:block;width:24px;height:2px;background:#fff;border-radius:2px}

/* Hero */
.hero{background:linear-gradient(135deg,#065F46 0%,#10B981 100%);color:#fff;text-align:center;padding:80px 2rem;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");opacity:0.5}
.hero-content{position:relative;max-width:800px;margin:0 auto}
.hero h1{font-size:3rem;font-weight:800;margin-bottom:1rem;line-height:1.2;font-family:'Plus Jakarta Sans',sans-serif}
.hero p{font-size:1.15rem;opacity:0.9;max-width:600px;margin:0 auto 2rem;line-height:1.7}
.hero-stats{display:flex;justify-content:center;gap:3rem;margin-top:3rem}
.hero-stat{text-align:center}
.hero-stat strong{display:block;font-size:2rem;font-weight:800;font-family:'Plus Jakarta Sans',sans-serif}
.hero-stat span{font-size:0.85rem;opacity:0.8}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 28px;border-radius:8px;font-weight:600;font-size:0.95rem;text-decoration:none;transition:all 0.25s;cursor:pointer;border:none}
.btn-primary{background:#fff;color:#065F46}
.btn-primary:hover{background:#ECFDF5;transform:translateY(-1px)}
.btn-secondary{background:rgba(255,255,255,0.15);color:#fff;border:2px solid rgba(255,255,255,0.4)}
.btn-secondary:hover{background:rgba(255,255,255,0.25)}
.btn-outline{background:transparent;color:#065F46;border:2px solid #065F46;padding:10px 24px}
.btn-outline:hover{background:#065F46;color:#fff}
.btn-sm{padding:8px 18px;font-size:0.85rem}

/* Layout */
.container{max-width:1200px;margin:0 auto;padding:0 2rem}
.section{padding:60px 0}
.section:nth-child(even){background:var(--bg-white)}

/* Section Headers */
.section-header{text-align:center;margin-bottom:40px}
.section-header h2{font-size:2rem;font-weight:700;color:var(--primary);margin-bottom:8px;font-family:'Plus Jakarta Sans',sans-serif}
.section-header p{color:var(--text-light);font-size:1.05rem}

/* Cards Grid */
.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}

/* Tool & Article Cards */
.tool-card,.article-card{background:var(--bg-white);border-radius:12px;padding:24px;box-shadow:var(--shadow);transition:all 0.3s;border:1px solid var(--border);text-decoration:none;color:inherit;display:flex;flex-direction:column}
.tool-card:hover,.article-card:hover{box-shadow:var(--shadow-hover);border-color:var(--accent);transform:translateY(-3px)}
.tool-card h3,.article-card h3{color:var(--primary);font-size:1.1rem;margin-bottom:8px;font-weight:600}
.tool-card p,.article-card p{color:var(--text-light);font-size:0.9rem;margin-bottom:14px;flex:1}
.tool-card-icon{width:48px;height:48px;background:var(--tag-bg);border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:14px;color:var(--accent)}
.tool-card-icon svg{width:24px;height:24px}

/* Tags & Badges */
.tag{display:inline-block;background:var(--tag-bg);color:var(--primary);padding:3px 12px;border-radius:20px;font-size:0.75rem;font-weight:600;align-self:flex-start}
.badge{display:inline-block;padding:3px 12px;border-radius:20px;font-size:0.75rem;font-weight:600;align-self:flex-start}
.badge-organic{background:#EDE9FE;color:#7C3AED}
.badge-inorganic{background:#DBEAFE;color:#1D4ED8}
.badge-physical{background:#FEF3C7;color:#D97706}
.badge-analytical{background:#FCE7F3;color:#DB2777}
.badge-environment{background:#D1FAE5;color:#059669}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:0.85rem;color:var(--text-light);margin-bottom:0}
.breadcrumb a{color:var(--primary);text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb span{margin:0 6px}

/* Cards text center */
.text-center{text-align:center}
.mt-4{margin-top:24px}

/* Article Content */
.article-content h2{font-size:1.4rem;color:var(--primary);margin:28px 0 12px;border-bottom:2px solid var(--tag-bg);padding-bottom:8px}
.article-content h3{font-size:1.2rem;color:#047857;margin:20px 0 10px}
.article-content p{color:#374151;margin-bottom:16px;font-size:1.02rem;line-height:1.9}

/* FAQ */
.faq{margin-top:3rem;background:#f9fafb;padding:1.5rem;border-radius:12px}
.faq h2{margin-top:0;border-bottom:2px solid #cbd5e1}
.faq details{background:#fff;margin:0.75rem 0;border-radius:8px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,0.1)}
.faq summary{padding:1rem;font-weight:600;cursor:pointer;background:#fff;transition:background 0.2s;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{background:#f8fafc}
.faq p{padding:1rem;padding-top:0.5rem;margin:0}
.related{margin-top:2rem;padding-top:2rem;border-top:1px solid #d1fae5}
.related h2{font-size:1.3rem}
.related ul{list-style:none;margin-left:0}
.related li{padding:0.5rem 0;border-bottom:1px solid #f1f5f9}
.related a{color:var(--primary);text-decoration:none}
.related a:hover{text-decoration:underline}

/* Article page styles */
article h1{font-size:2.2rem;color:#0f172a;margin-bottom:0.5rem;line-height:1.3}
article .meta{color:#64748b;font-size:0.9rem;margin-bottom:1.5rem}
article img{max-width:100%;border-radius:12px;margin:1.5rem 0;box-shadow:0 4px 15px rgba(0,0,0,0.1)}
article .caption{text-align:center;color:#64748b;font-size:0.85rem;margin-top:-1rem;margin-bottom:1.5rem;font-style:italic}
article h2{font-size:1.5rem;color:var(--primary);margin:2rem 0 1rem;border-bottom:2px solid #d1fae5;padding-bottom:0.5rem}
article h3{font-size:1.2rem;color:#047857;margin:1.5rem 0 0.75rem}
article p{margin-bottom:1rem;text-align:justify}
article ul,article ol{margin:1rem 0 1rem 1.5rem}
article li{margin-bottom:0.5rem}
article strong{color:var(--primary)}
article .highlight{background:#fef3c7;padding:0.2rem 0.4rem;border-radius:4px}
.related a{color:var(--primary)}

/* Footer */
.footer{background:var(--primary);color:#d1fae5;padding:3rem 0 1rem;margin-top:auto}
.footer-inner{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;max-width:1200px;margin:0 auto;padding:0 2rem}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:12px}
.footer-col p{font-size:0.9rem;opacity:0.8;line-height:1.6}
.footer-col ul{list-style:none;padding:0}
.footer-col li{margin-bottom:8px}
.footer-col a{color:#d1fae5;text-decoration:none;font-size:0.9rem;opacity:0.8}
.footer-col a:hover{opacity:1;text-decoration:underline}
.footer-bottom{text-align:center;padding:1.5rem 2rem 0;margin-top:2rem;border-top:1px solid rgba(255,255,255,0.1);max-width:1200px;margin-left:auto;margin-right:auto}
.footer-bottom p{font-size:0.85rem;opacity:0.6}

/* Tool page */
.tool-container{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin:32px 0}
.tool-form{background:#fff;border-radius:12px;padding:28px;box-shadow:var(--shadow);border:1px solid var(--border)}
.tool-result{background:linear-gradient(135deg,#ECFDF5 0%,#d1fae5 100%);border-radius:12px;padding:28px;display:flex;flex-direction:column;justify-content:center;border:1px solid #a7f3d0}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-weight:600;color:var(--primary);margin-bottom:6px;font-size:0.9rem}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:12px 14px;border:2px solid var(--border);border-radius:8px;font-size:1rem;font-family:inherit;transition:border-color 0.2s}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--accent)}

/* Filter bar */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:32px;justify-content:center}
.filter-btn{padding:8px 18px;border:2px solid var(--border);border-radius:20px;background:#fff;color:var(--text);font-size:0.85rem;font-weight:500;cursor:pointer;transition:all 0.2s}
.filter-btn:hover,.filter-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* Mobile Responsive */
@media(max-width:768px){
  .nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--primary);flex-direction:column;gap:0;padding:0.5rem 0;box-shadow:0 4px 12px rgba(0,0,0,0.15)}
  .nav.open{display:flex}
  .nav a{padding:12px 2rem;width:100%;border-bottom:1px solid rgba(255,255,255,0.1)}
  .hamburger{display:flex}
  .hero{padding:50px 1.5rem}
  .hero h1{font-size:2rem}
  .hero-stats{gap:1.5rem}
  .hero-stat strong{font-size:1.5rem}
  .container{padding:0 1rem}
  .section{padding:40px 0}
  .cards-grid{grid-template-columns:1fr}
  .tool-container{grid-template-columns:1fr}
  .section-header h2{font-size:1.6rem}
  article h1{font-size:1.7rem}
  .header-inner{padding:0.75rem 1rem}
  .footer-inner{grid-template-columns:1fr;text-align:center}
}