*{box-sizing:border-box;margin:0;padding:0}html,body{background:var(--bg);color:var(--text);font-family:Inter,sans-serif;transition:background .3s,color .3s}:root{--primary:#1e3a8a;--secondary:#1e2f6d;--bg:#fff;--text:#111;--header-bg:#f1f5f9}.dark{--primary:#e8ecf8;--secondary:#1d69d4;--bg:#1b1e23;--text:#e2e8f0;--header-bg:#053584}a{color:inherit;text-decoration:none}.site-header{background:var(--header-bg);z-index:1000;width:100%;position:fixed;top:0;left:0;box-shadow:0 2px 8px rgba(0,0,0,.06)}.nav{justify-content:space-between;align-items:center;gap:1rem;max-width:1200px;margin:0 auto;padding:1rem;display:flex}.name{color:var(--primary);font-weight:700}.nav-list{gap:1.25rem;list-style:none;display:flex}.nav-list a{color:var(--text);text-decoration:none}.theme-button{background:var(--secondary);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:.4rem .6rem}