:root {
      --accent:      #2196F3;
      --accent-dim:  rgba(33, 150, 243, 0.10);
      --accent-glow: rgba(33, 150, 243, 0.18);
    }
    .about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-top: 2rem; }
    @media (max-width: 640px) { .about-grid { grid-template-columns: 1fr; } }
    .stat-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; text-align: center; }
    .stat-card__value { font-family: var(--mono); font-size: 2rem; font-weight: 600; color: var(--accent); display: block; }
    .stat-card__label { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.25rem; display: block; }
    .profile-link-grid { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }
    .profile-link { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.6rem 1.1rem; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 0.85rem; color: var(--text); text-decoration: none; transition: border-color 0.2s, color 0.2s; }
    .profile-link:hover { border-color: var(--accent); color: var(--accent); opacity: 1; }
    .cert-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin-top: 1.5rem; }
    .cert-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.2rem 1.5rem; display: flex; align-items: center; gap: 0.9rem; }
    .cert-item__icon { font-size: 1.4rem; flex-shrink: 0; }
    .cert-item__name { font-size: 0.88rem; font-weight: 600; color: var(--text); }
    .cert-item__org { font-size: 0.78rem; color: var(--text-muted); }
    .bio-section p { color: var(--text); font-size: 1.05rem; line-height: 1.85; margin-bottom: 1.2rem; }
    .bio-section strong { color: var(--accent); }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
    .tag { background: var(--accent-dim); color: var(--accent); border: 1px solid rgba(33,150,243,0.25); border-radius: 4px; font-family: var(--mono); font-size: 0.75rem; padding: 0.2rem 0.6rem; }
    .navbar.fixed-top { background: rgba(15, 15, 20, 0.97) !important; display: flex !important; opacity: 1 !important; }

button.profile-link { cursor: pointer; font: inherit; font-size: 0.85rem; }

.bio-photo { margin: 2rem 0; max-width: 640px; }
.bio-photo img { display: block; width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--border); }
.bio-photo figcaption { margin-top: 0.6rem; font-size: 0.85rem; color: var(--text-muted); }

.skills-intro { color: var(--text-muted); margin: 0 0 2rem; max-width: 640px; }
.skills-intro a { color: var(--accent); }
.skills-group-icon { color: var(--accent); width: 1.4em; margin-right: 0.25rem; text-align: center; }
.about-grid > :last-child:nth-child(odd) { grid-column: 1 / -1; }