:root{--bg-primary: #ffffff;--bg-secondary: #f8fafc;--bg-card: #ffffff;--text-primary: #1e293b;--text-secondary: #64748b;--accent-color: #2563eb;--accent-hover: #1d4ed8;--border-color: #e2e8f0;--shadow-color: rgba(0, 0, 0, .1);--nav-bg: rgba(255, 255, 255, .95);--blob-color-1: #dbeafe;--blob-color-2: #f3e8ff}[data-theme=dark]{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-card: #1e293b;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--accent-color: #3b82f6;--accent-hover: #60a5fa;--border-color: #334155;--shadow-color: rgba(0, 0, 0, .5);--nav-bg: rgba(15, 23, 42, .95);--blob-color-1: rgba(37, 99, 235, .2);--blob-color-2: rgba(168, 85, 247, .2)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:var(--text-primary);background-color:var(--bg-primary);overflow-x:hidden;padding-top:80px;transition:background-color .3s ease,color .3s ease}a{text-decoration:none;color:inherit}ul{list-style:none}.container{max-width:1200px;margin:0 auto;padding:0 20px}.section{padding:80px 0;position:relative}.section-title{text-align:center;font-size:2.5rem;font-weight:800;color:var(--text-primary);margin-bottom:40px}div,section,h1,h2,h3,p,span,button,input,textarea{transition:background-color .3s ease,color .3s ease,border-color .3s ease,box-shadow .3s ease}footer{background:var(--bg-secondary);color:var(--text-primary);text-align:center;padding:40px 0;border-top:1px solid var(--border-color)}footer p{color:var(--text-secondary);font-size:.9rem}