* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: #f3f4f6; min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px; }
.card { background: white; border-radius: 8px; box-shadow: 0 10px 25px rgba(0,0,0,0.1); padding: 32px; width: 100%; max-width: 384px; }
h1 { font-size: 24px; font-weight: 700; color: #1f2937; margin-bottom: 24px; text-align: center; }
label { display: block; font-size: 14px; color: #4b5563; margin-bottom: 4px; }
input { width: 100%; border: 1px solid #d1d5db; border-radius: 4px; padding: 8px 12px; font-size: 16px; outline: none; margin-bottom: 16px; }
input:focus { border-color: #3b82f6; box-shadow: 0 0 0 2px rgba(59,130,246,0.3); }
button { width: 100%; background: #2563eb; color: white; border: none; border-radius: 4px; padding: 8px 16px; font-size: 16px; cursor: pointer; transition: background 0.2s; }
button:hover { background: #1d4ed8; }
.error { color: #dc2626; font-size: 14px; margin-bottom: 16px; }