*{box-sizing:border-box;margin:0;padding:0;font-family:Arial,Helvetica,sans-serif}
body{color:#222;background:#f7f7f8;line-height:1.6}
.container{max-width:980px;margin:18px auto;padding:0 16px}
.site-header{background:#ffffff;padding:18px 0;border-bottom:1px solid #e3e3e3}
.site-header .container{display:flex;align-items:center;gap:18px}
.avatar{width:auto;height:auto;max-width:100%;object-fit:contain;border-radius:8px;border:1px solid #ddd}
.title h1{font-size:1.6rem;margin-bottom:6px}
.subtitle{color:#555;margin-bottom:6px}
.contact a{color:#1a73e8;text-decoration:none}
.layout{display:flex;gap:20px;max-width:1100px;margin:18px auto;padding:0 16px;align-items:flex-start}
.nav{position:sticky;top:12px;display:flex;flex-direction:column;gap:6px;padding:12px;background:#fff;border:1px solid #ececec;border-radius:8px;min-width:230px;max-height:calc(100vh - 24px);overflow:auto}
.nav a{color:#333;text-decoration:none;padding:6px 10px;border-radius:6px;transition:background 0.2s ease,color 0.2s ease}
.nav a:hover{background:#f0f4ff}
.nav a.active{font-weight:700;background:#e9f0ff;color:#1a3d8f}
.content{flex:1;background:#fff;padding:20px;border-radius:8px;border:1px solid #eee}
section{margin-bottom:18px}
section h2{font-size:1.15rem;margin-bottom:10px;color:#111}
/* Make subheadings visually distinct from main section titles */
.content h2{font-size:1.4rem;color:#0b2a66}
.content h3{font-size:1.02rem;color:#103a8f;margin-top:14px;margin-bottom:8px;padding-left:10px;border-left:4px solid #d7e6ff;font-weight:600}
ol,ul{margin-left:18px}
.site-footer{text-align:center;padding:14px 0;color:#777;margin-top:12px}
@media(max-width:900px){.layout{flex-direction:column}.nav{position:static;width:100%;flex-direction:row;flex-wrap:wrap}.content{width:100%}}
@media(max-width:700px){.site-header .container{flex-direction:column;align-items:flex-start}}