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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #f8f9fa;
  color: #222;
  line-height: 1.5;
  padding: 20px;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

h1 {
  font-size: 2.4rem;
  text-align: center;
  margin-bottom: 0.5rem;
  color: #1a73e8;
}

.subtitle {
  text-align: center;
  color: #666;
  margin-bottom: 2rem;
}

form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

input[type="url"] {
  padding: 14px 16px;
  font-size: 1.1rem;
  border: 2px solid #ddd;
  border-radius: 8px;
  outline: none;
}

input[type="url"]:focus {
  border-color: #1a73e8;
  box-shadow: 0 0 0 3px rgba(26,115,232,0.15);
}

button {
  padding: 14px;
  font-size: 1.1rem;
  background: #1a73e8;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
}

button:hover {
  background: #1557b0;
}

.result {
  margin: 2rem 0;
  padding: 1.2rem;
  background: #f0f9ff;
  border-radius: 10px;
  text-align: center;
}

.short-url {
  font-size: 1.5rem;
  font-family: monospace;
  word-break: break-all;
  margin-bottom: 1rem;
  color: #1a73e8;
}

.copy-btn {
  padding: 10px 20px;
  font-size: 1rem;
  background: #34a853;
}

.copy-btn:hover {
  background: #2d8e47;
}

.message {
  padding: 1rem;
  margin: 1.5rem 0;
  border-radius: 8px;
}

.error {
  background: #fee;
  color: #c33;
  border: 1px solid #fcc;
}

.stats {
  text-align: center;
  color: #777;
  margin-top: 2rem;
  font-size: 0.95rem;
}

@media (max-width: 500px) {
  .container { padding: 1.5rem; }
  h1 { font-size: 2rem; }
}