:root{--primary:#ff6b35;--primary-dark:#e85a2a;--secondary:#2ecc71;--bg-body:#fff;--dark:#2d3436;--gray:#636e72;--light:#f5f6fa;--white:#fff;--shadow:0 8px 30px rgba(0,0,0,0.08);--radius:12px;--whatsapp:#25d366;--whatsapp-dark:#128c7e;--header-bg:#fff;--border-color:#e9ecef;--text-muted:#b2bec3;--mockup-item-bg:#f5f6fa}*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Poppins',sans-serif;color:var(--dark);line-height:1.6;overflow-x:hidden;background:var(--bg-body);transition:background .3s,color .3s}a{text-decoration:none;color:inherit;transition:.3s}a:hover{color:var(--primary)}ul{list-style:none}img{max-width:100%;display:block;height:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}header{background:var(--white);position:fixed;width:100%;top:0;z-index:1000;box-shadow:0 2px 15px rgba(0,0,0,0.05);transition:.3s}nav{max-width:1200px;margin:0 auto;padding:1rem 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.mockup{background:#333}.theme-btn{background:transparent;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:0;cursor:pointer;font-size:1.2rem;color:var(--dark);transition:.3s;margin-left:.5rem;flex-shrink:0}.theme-btn:hover{background:var(--border-color)}