:root{--bg-primary: #ffffff;--bg-secondary: #f3f4f6;--text-primary: #111827;--text-secondary: #4b5563;--text-accent: #2563eb;--border-color: #e5e7eb;--card-bg: #ffffff;--card-hover: #f9fafb;--overlay-blue: rgba(37, 99, 235, .4);--font-sans: "Inter", system-ui, Avenir, Helvetica, Arial, sans-serif;--spacing-section: 80px;--max-width: 1000px}[data-theme=dark]{--bg-primary: #0f172a;--bg-secondary: #1e293b;--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-accent: #60a5fa;--border-color: #334155;--card-bg: #1e293b;--card-hover: #334155;--overlay-blue: rgba(96, 165, 250, .3)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);transition:background-color .3s ease,color .3s ease;line-height:1.6}a{color:var(--text-accent);text-decoration:none;transition:color .2s}a:hover{text-decoration:underline}ul{list-style:none}button{cursor:pointer;border:none;background:none;font-family:inherit}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--text-secondary);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-accent)}.section-padding{padding:var(--spacing-section) 0}.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}.section-title{font-size:2rem;font-weight:700;margin-bottom:2rem;display:flex;align-items:center;gap:1rem}.section-title:after{content:"";display:block;height:1px;background-color:var(--border-color);flex-grow:1;max-width:300px}