:root{--bg: #0a0e14;--surface: #10151d;--border: #1f2833;--text-primary: #e6edf3;--text-secondary: #8b949e;--accent: #4dd0e1;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono: "SFMono-Regular", "Cascadia Code", Consolas, "Courier New", monospace}:root[data-theme=light]{--bg: #f7f9fb;--surface: #ffffff;--border: #e1e6eb;--text-primary: #10151d;--text-secondary: #55606b;--accent: #0c8599}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text-primary);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color .25s ease,color .25s ease}h1,h2,h3{margin:0}a{color:inherit}.section__kicker{font-family:var(--font-mono);color:var(--accent);font-size:.9rem;margin:0 0 .75rem}.section__title{font-size:clamp(1.75rem,4vw,2.5rem);font-weight:700;color:var(--text-primary);letter-spacing:-.01em}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;border-radius:8px;font-size:.95rem;font-weight:500;text-decoration:none;transition:background .2s ease,border-color .2s ease,transform .2s ease}.btn--primary{background:var(--accent);color:#04141a}.btn--primary:hover{transform:translateY(-1px);opacity:.9}.btn--ghost{border:1px solid var(--border);color:var(--text-primary)}.btn--ghost:hover{border-color:var(--accent);color:var(--accent)}