.faq-section {
  padding: 80px 0;
  background: var(--bg-section);
  border-top: 1px solid var(--border);
}

.faq-section .container { max-width: 860px; }

.faq-tag {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.faq-heading {
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 8px;
  line-height: 1.1;
}

.faq-sub {
  font-size: 16px;
  color: var(--slate);
  margin-bottom: 40px;
}

.faq-list { display: flex; flex-direction: column; gap: 0; }

.faq-subheading {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin: 48px 0 0 0;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent);
}

.faq-subheading:first-child { margin-top: 0; }

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-subheading + .faq-item { border-top: 1px solid var(--border); }

.faq-question {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 600;
  color: var(--dark);
  line-height: 1.4;
  transition: color 0.2s;
}

.faq-question:hover { color: var(--accent); }

.faq-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 300;
  color: var(--muted);
  margin-top: 2px;
  transition: all 0.2s;
}

.faq-item.open .faq-icon {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.faq-icon::after { content: '+'; }
.faq-item.open .faq-icon::after { content: '−'; }

.faq-answer {
  display: none;
  padding: 0 0 20px 0;
  font-size: 16px;
  color: var(--slate);
  line-height: 1.75;
  max-width: 780px;
}

.faq-item.open .faq-answer { display: block; }

/* ── Nested group accordion (parent + child) ─────────────────── */

.faq-group { border-bottom: 1px solid var(--border); }
.faq-group:first-child { border-top: 1px solid var(--border); }

.faq-group-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.3;
  letter-spacing: 0.2px;
  transition: color 0.2s;
}

.faq-group-toggle:hover { color: var(--accent); }

.faq-group.open .faq-group-toggle { color: var(--accent); }

.faq-sublist {
  display: none;
  padding: 0 0 16px 24px;
  border-left: 2px solid var(--accent);
  margin-left: 4px;
}

.faq-group.open .faq-sublist { display: block; }

.faq-sublist .faq-item { border-bottom: 1px solid var(--border); }
.faq-sublist .faq-item:first-child { border-top: 1px solid var(--border); }
.faq-sublist .faq-item:last-child { border-bottom: none; }

/* ── Responsive ──────────────────────────────────────────────── */

@media (max-width: 640px) {
  .faq-section { padding: 56px 0; }
  .faq-question { font-size: 15px; padding: 16px 0; }
  .faq-answer { font-size: 15px; }
  .faq-group-toggle { font-size: 17px; }
  .faq-sublist { padding-left: 14px; }
}