/* === Cards (base) === */
.card {
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 28px;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover { border-color: rgba(255,255,255,0.12); transform: translateY(-1px); }
.card-icon {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; margin-bottom: 16px;
}
.card-icon.accent { background: var(--accent-subtle); color: var(--accent); }
.card-icon.green { background: var(--green-subtle); color: var(--green); }
.card-icon.purple { background: var(--purple-subtle); color: var(--purple); }
.card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.3px; }
.card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; font-weight: 300; }

/* === Project Cards === */
.project-card {
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 28px;
  display: flex; flex-direction: column; gap: 12px;
  transition: border-color 0.2s, transform 0.2s;
}
.project-card:hover { border-color: rgba(255,255,255,0.12); transform: translateY(-1px); }
.project-card h3 {
  font-size: 18px; font-weight: 600; letter-spacing: -0.3px;
  color: var(--text-primary);
}
.project-card .tags {
  display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px;
}
.project-card .tag {
  display: inline-flex; align-items: center;
  font-family: var(--font-mono); font-size: 10px; font-weight: 500;
  padding: 2px 8px; border-radius: 4px;
  background: rgba(255,255,255,0.04); color: var(--text-tertiary);
  border: 1px solid var(--border-subtle);
  text-transform: uppercase; letter-spacing: 0.5px;
}
.project-card .desc {
  font-size: 14px; color: var(--text-secondary); line-height: 1.65; font-weight: 300;
}
.project-card .links {
  display: flex; gap: 16px; flex-wrap: wrap; margin-top: auto; padding-top: 4px;
}
.project-card .links a {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 13px; font-weight: 500; color: var(--text-tertiary);
  transition: color 0.15s;
}
.project-card .links a:hover { color: var(--accent); }
.project-card .cat {
  font-family: var(--font-mono); font-size: 10px; font-weight: 500;
  color: var(--accent); text-transform: uppercase; letter-spacing: 0.5px;
  margin-bottom: 2px;
}
.project-card .pub-date,
.book-card .pub-date {
  font-size: 11px; color: var(--text-tertiary); margin-top: 2px; margin-bottom: 4px;
}

/* === Feature Grid === */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 900px) { .features-grid { grid-template-columns: 1fr; } }

/* === Project Grid === */
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
@media (max-width: 900px) { .projects-grid { grid-template-columns: 1fr; } }