:root {
  --m3-primary: #6750A4;
  --m3-on-primary: #ffffff;
  --m3-surface: #ffffff;
  --m3-on-surface: #1c1b1f;
  --m3-outline: #cac4d0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --m3-primary: #D0BCFF;
    --m3-on-primary: #381E72;
    --m3-surface: #1c1b1f;
    --m3-on-surface: #e6e1e5;
    --m3-outline: #49454f;
  }
}

.m3-card {
  position: fixed;
  left: 16px;
  right: 16px;
  bottom: -250px;
  background: var(--m3-surface);
  color: var(--m3-on-surface);
  border-radius: 28px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  padding: 20px;
  z-index: 9999;
  transition: bottom 0.35s cubic-bezier(.2,.8,.2,1);
  font-family: "Roboto", system-ui, sans-serif;
}

.m3-card.show {
  bottom: 20px;
}

.m3-content {
  display: flex;
  gap: 16px;
  align-items: center;
}

.m3-icon {
  width: 64px;
  height: 64px;
  border-radius: 20px;
}

.m3-title {
  font-size: 18px;
  font-weight: 600;
}

.m3-desc {
  font-size: 14px;
  opacity: 0.8;
  margin-top: 4px;
}

.m3-actions {
  margin-top: 20px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.m3-btn {
  border: none;
  padding: 10px 20px;
  border-radius: 100px;
  font-size: 14px;
  cursor: pointer;
}

.m3-btn.filled {
  background: var(--m3-primary);
  color: var(--m3-on-primary);
}

.m3-btn.text {
  background: transparent;
  color: var(--m3-primary);
}