* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  min-height: 100vh;
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.container {
  width: 100%;
  max-width: 720px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 40px 30px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
  text-align: center;
}

h1 {
  font-size: 32px;
  margin-bottom: 10px;
}

.subtitle {
  color: #d0d8ff;
  margin-bottom: 30px;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 30px;
}

button {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  background: #4ecdc4;
  color: #1a1a1a;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease;
}

button:hover {
  background: #38b2a8;
  transform: translateY(-2px);
}

button:active {
  transform: translateY(0);
}

.result-box {
  background: rgba(0, 0, 0, 0.25);
  border-radius: 12px;
  padding: 24px;
}

.result {
  font-size: 20px;
  line-height: 1.6;
  word-break: break-word;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  transition: color 0.3s ease;
}

.copy-btn {
  background: #ff6b6b;
  color: #fff;
}

.copy-btn:hover {
  background: #e85a5a;
}