* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: #f5f5f5; display: flex; justify-content: center; align-items: center; min-height: 100vh; }
.container { background: #fff; padding: 32px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); width: 100%; max-width: 400px; }
h2 { margin-bottom: 16px; color: #555; }
input { display: block; width: 100%; padding: 10px 12px; margin-bottom: 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px; }
input:focus { outline: none; border-color: #4a90d9; }
button { display: block; width: 100%; padding: 10px; background: #4a90d9; color: #fff; border: none; border-radius: 4px; font-size: 14px; cursor: pointer; }
button:hover { background: #3a7bc8; }
button:disabled { background: #aaa; cursor: not-allowed; }
.switch { margin-top: 16px; text-align: center; font-size: 13px; color: #888; }
.switch a { color: #4a90d9; text-decoration: none; }
.msg { padding: 10px; border-radius: 4px; margin-bottom: 16px; font-size: 13px; }
.msg.success { background: #e8f5e9; color: #2e7d32; }
.msg.error { background: #fbe9e7; color: #c62828; }