* {
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
  background-color: #F4F6F8;
  margin: 0;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.card-box {
  background: #ffffff;
  border-radius: 16px;
  padding: 24px;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  text-align: center;
}

h2 {
  color: #2E5A1C;
  margin-top: 0;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

p.sub {
  color: #666;
  font-size: 14px;
  margin-bottom: 20px;
}

.agent-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.agent-btn {
  background: #FAFAFA;
  border: 1.5px solid #E2E8F0;
  border-radius: 10px;
  padding: 12px 8px;
  font-size: 15px;
  font-weight: 600;
  color: #333;
  cursor: pointer;
  transition: all 0.2s;
}

.agent-btn:hover,
.agent-btn.active {
  background: #E8F5E9;
  border-color: #4B9838;
  color: #2E5A1C;
}

.status-text {
  font-size: 13px;
  color: #888;
  margin-top: 8px;
  min-height: 20px;
}

.send-btn {
  background: #4B9838;
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 14px;
  font-size: 16px;
  font-weight: bold;
  width: 100%;
  cursor: pointer;
  margin-top: 10px;
  display: none;
  box-shadow: 0 4px 12px rgba(75, 152, 56, 0.3);
}

.send-btn:active {
  transform: scale(0.98);
}

.loading-spin {
  color: #4B9838;
  font-weight: bold;
}