* { box-sizing: border-box; margin: 0; padding: 0; font-family: Arial, sans-serif; }
body { background-color: #f4f7f6; display: flex; justify-content: center; align-items: center; min-height: 100vh; padding: 20px; }
.container { background: #fff; max-width: 500px; width: 100%; padding: 30px; border-radius: 8px; box-shadow: 0 4px 10px rgba(0,0,0,0.1); }
h2 { color: #333; margin-bottom: 10px; text-align: center; }
p { color: #666; margin-bottom: 20px; text-align: center; font-size: 14px; }
.form-group { margin-bottom: 15px; }
label { display: block; font-weight: bold; margin-bottom: 5px; color: #444; font-size: 14px; }
input { width: 100%; padding: 10px; border: 1px solid #ccc; border-radius: 4px; font-size: 16px; transition: border-color 0.3s; }
input:focus { border-color: #007BFF; outline: none; }
button { width: 100%; background-color: #28a745; color: white; border: none; padding: 12px; font-size: 16px; border-radius: 4px; cursor: pointer; font-weight: bold; margin-top: 10px; transition: background 0.3s; }
button:hover { background-color: #218838; }
button:disabled { background-color: #ccc; cursor: not-allowed; }
.hidden { display: none !important; }
.error { color: #dc3545; text-align: center; margin-top: 15px; font-size: 14px; font-weight: bold; background: #ffe6e6; padding: 10px; border-radius: 4px; }
#loading { text-align: center; margin-top: 15px; font-style: italic; color: #007BFF; }
#success-container { text-align: center; }
.success-icon { font-size: 50px; margin-bottom: 15px; }
small { color: #666; font-size: 12px; display: block; margin-top: 4px; }