:root{--bg:#0a0a0a;--card-bg:#161616;--text-main:#f5f5f5;--text-dim:#999;--accent:#fff;--border:#2a2a2a;--radius:12px;--transition:.2s cubic-bezier(.4, 0, .2, 1)}.contact-details-section{background-color:var(--bg);color:var(--text-main);max-width:800px;margin:4rem auto;padding:2rem;font-family:Inter,-apple-system,sans-serif}.portfolio-header{justify-content:space-between;align-items:flex-start;gap:1rem;margin-bottom:3rem;display:flex}.header-title{margin:0;font-size:1.75rem;font-weight:700}.subtitle{color:var(--text-dim);margin-top:.5rem;font-size:.95rem}.links-grid{grid-template-columns:1fr 1fr;gap:1rem;display:grid}.link-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);transition:var(--transition);justify-content:space-between;align-items:center;padding:1.5rem;text-decoration:none;display:flex}.link-card.full-width{grid-column:span 2}.link-card:hover{background:#1c1c1c;border-color:#3a3a3a;transform:translateY(-2px)}.link-label{color:var(--text-main);font-size:1.1rem;font-weight:600;display:block}.link-sub{color:var(--text-dim);margin-top:.25rem;font-size:.85rem}.arrow{color:var(--text-dim);transition:var(--transition);font-size:1.2rem}.link-card:hover .arrow{color:var(--text-main);transform:translate(2px,-2px)}.action-links{gap:.75rem;display:flex}.btn-primary,.btn-secondary{border-radius:var(--radius);cursor:pointer;transition:var(--transition);padding:.7rem 1.4rem;font-size:.9rem;font-weight:500;text-decoration:none;display:inline-block}.btn-primary{background:var(--accent);color:var(--bg);border:none}.btn-secondary{color:var(--text-main);border:1px solid var(--border);background:0 0}.btn-primary:hover{opacity:.9}.btn-secondary:hover{border-color:var(--text-dim)}@media (max-width:600px){.portfolio-header{flex-direction:column;align-items:flex-start}.links-grid{grid-template-columns:1fr}.link-card.full-width{grid-column:span 1}.action-links{width:100%;margin-top:1rem}.btn-primary,.btn-secondary{text-align:center;flex:1}}