:root {
            --primary: #6C63FF;
            --primary-dark: #5A52D5;
        }
        body {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            padding: 20px;
            font-family: 'Segoe UI', system-ui, sans-serif;
        }
        .login-card {
            background: var(--bg-surface);
            color: var(--text-primary);
            backdrop-filter: blur(20px);
            border-radius: 24px;
            padding: 40px;
            width: 100%;
            max-width: 420px;
            box-shadow: 0 30px 80px rgba(0, 0, 0, 0.2);
        }
        .login-card .brand {
            text-align: center;
            margin-bottom: 32px;
        }
        .login-card .brand .icon {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, var(--primary), #764ba2);
            border-radius: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            color: #fff;
            margin-bottom: 12px;
        }
        .login-card .brand h2 {
            font-weight: 700;
            margin: 0;
            background: linear-gradient(135deg, var(--primary), #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .login-card .brand p {
            color: var(--text-secondary);
            margin: 4px 0 0;
        }
        .login-card .form-group {
            margin-bottom: 20px;
        }
        .login-card .form-group label {
            font-weight: 500;
            font-size: 14px;
            margin-bottom: 6px;
            display: block;
        }
        .login-card .form-group .input-group {
            border-radius: 12px;
            overflow: hidden;
            border: 2px solid var(--border-color);
            transition: all 0.3s;
            background: var(--bg-surface);
        }
        .login-card .form-group .input-group:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(108, 99, 255, 0.08);
        }
        .login-card .form-group .input-group-text {
            background: none;
            border: none;
            color: var(--text-secondary);
            padding: 0 0 0 16px;
        }
        .login-card .form-group .form-control {
            border: none;
            padding: 12px 16px;
            font-size: 14px;
            background: transparent;
        }
        .login-card .form-group .form-control:focus {
            box-shadow: none;
        }
        .login-card .btn-login {
            width: 100%;
            padding: 14px;
            border: none;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s;
            cursor: pointer;
        }
        .login-card .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(108, 99, 255, 0.3);
        }
        .login-card .btn-login:disabled {
            opacity: 0.7;
            cursor: not-allowed;
            transform: none;
        }
        .alert-custom {
            border-radius: 12px;
            padding: 12px 16px;
            font-size: 14px;
        }
        .demo-info {
            text-align: center;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
        }
        .demo-info small {
            color: var(--text-secondary);
        }
        .demo-info .badge {
            background: var(--border-color);
            color: var(--text-primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 500;
            font-size: 12px;
        }