.substack-iframe {
  width: 410px;
  height: 150px;
}

.substack-fluid {
  width: 100%;
  background: #fff;
  border-radius: 20px;
  padding: 48px;
  box-sizing: border-box;
  border: 1px solid #eee;
  box-shadow: 0 12px 30px rgba(0,0,0,0.06);
}

.substack-fluid-inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
  align-items: center;
}

.substack-fluid .badge {
  display: inline-block;
  background: #ffcc33;
  color: #000;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.substack-fluid h2 {
  font-size: 1.8rem;
  margin-bottom: 12px;
  letter-spacing: -0.6px;
  color: #000;
}

.substack-fluid p {
  font-size: 1.05rem;
  color: #555;
  line-height: 1.6;
}

.substack-fluid .form {
  display: flex;
  gap: 12px;
}

.substack-fluid .form input {
  flex: 1;
  padding: 16px;
  font-size: 1rem;
  border-radius: 14px;
  border: 1px solid #ddd;
  outline: none;
}

.substack-fluid .form input:focus {
  border-color: #ffcc33;
  box-shadow: 0 0 0 4px rgba(255, 204, 51, 0.25);
}

.substack-fluid .form button {
  padding: 16px 26px;
  background: #000;
  color: #fff;
  border: none;
  border-radius: 14px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.substack-fluid .form button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(0,0,0,0.18);
}

/* Responsivo */
@media (max-width: 900px) {
  .substack-iframe {
    width: 268px;
  }

  .substack-fluid {
    padding: 32px 15px;
  }

  .substack-fluid-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .substack-fluid .form {
    flex-direction: column;
  }

  .substack-fluid h2 {
    font-size: 1.4rem;
  }
}