Free Trial form in features grid: 2x3 layout, email + location + send

- features-grid changed to repeat(3, 1fr) for 2x3 layout
- 6th cell is a Free Trial card with midnight bg, brass border
- Email input, location dropdown (preselected to best ping server),
  brass Send button
- POST to webhook as JSON {email, location}
- On success: form hides, success message shown
- Responsive: 3col -> 2col -> 1col

style.css

@@ -382,7 +382,7 @@ img { max-width: 100%; height: auto; vertical-align: middle; }
 /* ---- Features ---- */
 .features-grid {
   display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
+  grid-template-columns: repeat(3, 1fr);
   gap: 1.5rem;
 }
 .feature-card {
@@ -420,8 +420,88 @@ img { max-width: 100%; height: auto; vertical-align: middle; }
 .feature-card p {
   font-size: 0.85rem;
   color: var(--ink-soft);
-  margin: 0;
-  line-height: 1.6;
+  line-height: 1.5;
+  margin-bottom: 0;
+}
+.feature-card-trial {
+  background: var(--midnight);
+  border: 1px solid var(--line-brass);
+  border-radius: var(--radius-lg);
+  padding: 1.5rem;
+  text-align: center;
+  transition: all 0.25s;
+  box-shadow: var(--shadow-rest);
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+}
+.feature-card-trial h3 {
+  font-family: Marcellus, Georgia, serif;
+  font-size: 1.05rem;
+  font-weight: 400;
+  margin-bottom: 0.35rem;
+  color: #fff;
+}
+.feature-card-trial p {
+  font-size: 0.8rem;
+  color: rgba(255,255,255,0.55);
+  margin-bottom: 1rem;
+  line-height: 1.4;
+}
+.trial-form {
+  display: flex;
+  flex-direction: column;
+  gap: 0.6rem;
+}
+.trial-form input,
+.trial-form select {
+  padding: 0.6rem 0.8rem;
+  border-radius: var(--radius);
+  border: 1px solid var(--line-brass);
+  background: rgba(255,255,255,0.06);
+  color: #fff;
+  font-family: Inter, sans-serif;
+  font-size: 0.82rem;
+  outline: none;
+  transition: border-color 0.2s;
+}
+.trial-form input::placeholder {
+  color: rgba(255,255,255,0.3);
+}
+.trial-form input:focus,
+.trial-form select:focus {
+  border-color: var(--brass);
+  background: rgba(255,255,255,0.1);
+}
+.trial-form select option {
+  background: var(--midnight);
+  color: #fff;
+}
+.trial-form .btn-brass {
+  padding: 0.6rem;
+  font-size: 0.82rem;
+  width: 100%;
+}
+.trial-success {
+  display: none;
+  font-size: 0.82rem;
+  color: #4ade80;
+  line-height: 1.4;
+  margin-top: 0.5rem;
+}
+.trial-success.visible {
+  display: block;
+}
+
+@media (max-width: 768px) {
+  .features-grid {
+    grid-template-columns: repeat(2, 1fr);
+  }
+}
+@media (max-width: 576px) {
+  .features-grid {
+    grid-template-columns: 1fr;
+  }
 }
 
 /* ---- FAQ ---- */