* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-container { background: white; padding: 40px; border-radius: 12px; box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1); width: 100%; max-width: 400px; text-align: center; }
.logo { margin-bottom: 30px; }
.logo h1 { color: #5e6ed6; font-size: 28px; font-weight: 600; margin-bottom: 8px; }
.logo p { color: #666; font-size: 14px; }
.form-group { margin-bottom: 20px; text-align: left; }
.form-group label { display: block; margin-bottom: 8px; color: #333; font-weight: 500; font-size: 14px; }
.form-group input { width: 100%; padding: 12px 16px; border: 2px solid #e1e5e9; border-radius: 8px; font-size: 16px; transition: border-color 0.3s ease; }
.form-group input:focus { outline: none; border-color: #5e6ed6; }
.login-btn { width: 100%; padding: 14px; background: #5e6ed6; color: white; border: none; border-radius: 8px; font-size: 16px; font-weight: 600; cursor: pointer; transition: background-color 0.3s ease; }
.login-btn:hover { background: #4a59c2; }
.login-btn:disabled { background: #c2c6dc; cursor: not-allowed; }
.error-message { color: #e74c3c; font-size: 14px; margin-top: 10px; display: none; }
.loading { display: none; margin-top: 20px; }
.spinner { border: 3px solid #f3f3f3; border-top: 3px solid #5e6ed6; border-radius: 50%; width: 24px; height: 24px; animation: spin 1s linear infinite; margin: 0 auto; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }